move roadmap to a GH issue

.appveyor.yml

@@ -25,10 +25,10 @@ install:
   - cargo -vV
 
 cache:
-  - '%USERPROFILE%\.cache\sccache -> .appveyor.yml'
-  - '%USERPROFILE%\.cargo -> .appveyor.yml'
-  - '%USERPROFILE%\.rustup -> .appveyor.yml'
-  - 'target -> .appveyor.yml'
+  - '%USERPROFILE%\.cache\sccache -> Cargo.toml'
+  - '%USERPROFILE%\.cargo -> Cargo.toml'
+  - '%USERPROFILE%\.rustup -> Cargo.toml'
+  - 'target -> Cargo.toml'
 
 #test_script:
 #  - cargo build --verbose --all

Cargo.toml

@@ -4,8 +4,8 @@ edition = "2018"
 name = "doukutsu-rs"
 version = "0.1.0"
 
-[lib]
-crate-type = ["lib", "cdylib"]
+#[lib]
+#crate-type = ["lib", "cdylib"]
 
 [package.metadata.android]
 android_version = 29
@@ -18,12 +18,12 @@ opengles_version = [3, 1]
 fullscreen = true
 orientation = "sensorLandscape"
 permission = [
-    {name = "android.permission.READ_EXTERNAL_STORAGE"},
-    {name = "android.permission.WRITE_EXTERNAL_STORAGE"}
+    { name = "android.permission.READ_EXTERNAL_STORAGE" },
+    { name = "android.permission.WRITE_EXTERNAL_STORAGE" }
 ]
 application_metadatas = [
-    {name = "android:hardwareAccelerated", value = "true"},
-    {name = "android:requestLegacyExternalStorage", value = "true"}
+    { name = "android:hardwareAccelerated", value = "true" },
+    { name = "android:requestLegacyExternalStorage", value = "true" }
 ]
 
 [profile.release]
@@ -40,42 +40,34 @@ opt-level = 1
 opt-level = 1
 
 [features]
-default = ["scripting"]
+default = ["scripting", "backend-sdl"]
+backend-sdl = ["sdl2"]
+backend-gfx = ["winit", "imgui-gfx-renderer", "imgui-winit-support"]
 scripting = ["lua-ffi"]
 editor = []
 
 [dependencies]
-#cpal = {path = "./3rdparty/cpal"}
-#gfx_device_gl = {path = "./3rdparty/gfx/src/backend/gl"}
-#ggez = {path = "./3rdparty/ggez"}
-#glutin = {path = "./3rdparty/glutin/glutin"}
-#lua-ffi = {path = "./3rdparty/luajit-rs", optional = true}
-
 bitvec = "0.17.4"
 byteorder = "1.3"
 case_insensitive_hashmap = "1.0.0"
 chrono = "0.4"
-cpal = {git = "https://github.com/doukutsu-rs/cpal.git", branch = "android-support"}
-directories = "2"
-gfx = "0.18"
-gfx_core = "0.9"
-gfx_device_gl = {git = "https://github.com/doukutsu-rs/gfx.git", branch = "pre-ll"}
-ggez = {git = "https://github.com/doukutsu-rs/ggez.git", rev = "43631b0401271d4bc8fe4a5afba8aad63976dba1"}
-glutin = {git = "https://github.com/doukutsu-rs/glutin.git", branch = "master"}
-imgui = {git = "https://github.com/Gekkio/imgui-rs.git", rev = "7e2293bde67f869750ab0e649fbfbd842fb0c785"}
-imgui-gfx-renderer = {git = "https://github.com/Gekkio/imgui-rs.git", rev = "7e2293bde67f869750ab0e649fbfbd842fb0c785"}
-imgui-winit-support = {git = "https://github.com/Gekkio/imgui-rs.git", default-features = false, features = ["winit-23"], rev = "7e2293bde67f869750ab0e649fbfbd842fb0c785"}
-image = {version = "0.22", default-features = false, features = ["png_codec", "pnm", "bmp"]}
+cpal = { git = "https://github.com/doukutsu-rs/cpal.git", branch = "android-support" }
+directories = "3"
+imgui = "0.7.0"
+imgui-gfx-renderer = { version = "0.7.0", optional = true }
+imgui-winit-support = { version = "0.7.0", default-features = false, features = ["winit-23"], optional = true }
+image = { version = "0.22", default-features = false, features = ["png_codec", "pnm", "bmp"] }
 itertools = "0.9.0"
 lazy_static = "1.4.0"
 log = "0.4"
-lua-ffi = {git = "https://github.com/doukutsu-rs/lua-ffi.git", rev = "1ef3caf772d72068297ddf75df06fd2ef8c1daab", optional = true}
+lua-ffi = { git = "https://github.com/doukutsu-rs/lua-ffi.git", rev = "1ef3caf772d72068297ddf75df06fd2ef8c1daab", optional = true }
 lru = "0.6.0"
 num-derive = "0.3.2"
 num-traits = "0.2.12"
 paste = "1.0.0"
 pretty_env_logger = "0.4.0"
-serde = {version = "1", features = ["derive"]}
+sdl2 = { version = "0.34", optional = true, features = ["unsafe_textures", "bundled", "static-link"] }
+serde = { version = "1", features = ["derive"] }
 serde_derive = "1"
 serde_yaml = "0.8"
 strum = "0.18.0"
@@ -83,7 +75,10 @@ strum_macros = "0.18.0"
 # remove and replace when drain_filter is in stable
 vec_mut_scan = "0.3.0"
 webbrowser = "0.5.5"
-winit = {version = "0.24.0", features = ["serde"]}
+winit = { version = "0.24.0", features = ["serde"], optional = true }
+
+[target.'cfg(target_os = "windows")'.dependencies]
+winapi = { version = "0.3", features = ["winuser"] }
 
 [target.'cfg(target_os = "android")'.dependencies]
 ndk = "0.2"

src/bmfont.rs

@@ -3,8 +3,9 @@ use std::io;
 
 use byteorder::{LE, ReadBytesExt};
 
-use ggez::GameError::ResourceLoadError;
-use ggez::GameResult;
+use crate::framework::context::Context;
+use crate::framework::error::GameError::ResourceLoadError;
+use crate::framework::error::GameResult;
 use crate::str;
 
 #[derive(Debug)]

src/bmfont_renderer.rs

@@ -4,10 +4,13 @@ use std::path::PathBuf;
 use crate::bmfont::BMFont;
 use crate::common::{FILE_TYPES, Rect};
 use crate::engine_constants::EngineConstants;
-use ggez::{Context, filesystem, GameResult};
-use ggez::GameError::ResourceLoadError;
+
 use crate::str;
 use crate::texture_set::TextureSet;
+use crate::framework::error::GameError::ResourceLoadError;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
+use crate::framework::filesystem;
 
 pub struct BMFontRenderer {
     font: BMFont,
@@ -25,7 +28,6 @@ impl BMFontRenderer {
         let font = BMFont::load_from(filesystem::open(ctx, &full_path)?)?;
         let mut pages = Vec::new();
 
-        println!("stem: {:?}", stem);
         let (zeros, _, _) = FILE_TYPES
             .iter()
             .map(|ext| (1, ext, format!("{}_0{}", stem.to_string_lossy(), ext)))
@@ -38,7 +40,6 @@ impl BMFontRenderer {
 
         for i in 0..font.pages {
             let page_path = format!("{}_{:02$}", stem.to_string_lossy(), i, zeros);
-            println!("x: {}", &page_path);
 
             pages.push(page_path);
         }

src/builtin_fs.rs

@@ -5,9 +5,9 @@ use std::io::ErrorKind;
 use std::io::SeekFrom;
 use std::path::{Component, Path, PathBuf};
 
-use ggez::GameResult;
-use ggez::GameError::FilesystemError;
-use ggez::vfs::{OpenOptions, VFile, VFS, VMetadata};
+use crate::framework::error::GameError::FilesystemError;
+use crate::framework::error::GameResult;
+use crate::framework::vfs::{OpenOptions, VFile, VMetadata, VFS};
 
 #[derive(Debug)]
 pub struct BuiltinFile(Cursor<&'static [u8]>);
@@ -59,7 +59,7 @@ impl VMetadata for BuiltinMetadata {
     }
 }
 
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 enum FSNode {
     File(&'static str, &'static [u8]),
     Directory(&'static str, Vec<FSNode>),
@@ -232,7 +232,7 @@ impl VFS for BuiltinFS {
     }
 }
 
-/*#[test]
+#[test]
 fn test_builtin_fs() {
     let fs = BuiltinFS {
         root: vec![
@@ -240,7 +240,7 @@ fn test_builtin_fs() {
             FSNode::Directory("memes", vec![
                 FSNode::File("nothing.txt", &[]),
                 FSNode::Directory("secret stuff", vec![
-                    FSNode::File("passwords.txt", &[b'1', b'2', b'3', b'4', b'5', b'6',]),
+                    FSNode::File("passwords.txt", &b"12345678"),
                 ]),
             ]),
             FSNode::File("test2.txt", &[]),
@@ -252,4 +252,4 @@ fn test_builtin_fs() {
     println!("{:?}", fs.get_node(Path::new("/memes")).unwrap());
     println!("{:?}", fs.get_node(Path::new("/memes/nothing.txt")).unwrap());
     println!("{:?}", fs.get_node(Path::new("/memes/secret stuff/passwords.txt")).unwrap());
-}*/
+}

src/common.rs

@@ -234,6 +234,22 @@ impl Direction {
     }
 }
 
+#[derive(Debug, Clone, Copy)]
+pub struct Point<T: Num + PartialOrd + Copy = isize> {
+    pub x: T,
+    pub y: T,
+}
+
+impl<T: Num + PartialOrd + Copy> Point<T> {
+    #[inline(always)]
+    pub fn new(x: T, y: T) -> Point<T> {
+        Point {
+            x,
+            y,
+        }
+    }
+}
+
 #[derive(Debug, Clone, Copy)]
 pub struct Rect<T: Num + PartialOrd + Copy = isize> {
     pub left: T,
@@ -243,6 +259,7 @@ pub struct Rect<T: Num + PartialOrd + Copy = isize> {
 }
 
 impl<T: Num + PartialOrd + Copy> Rect<T> {
+    #[inline(always)]
     pub fn new(left: T, top: T, right: T, bottom: T) -> Rect<T> {
         Rect {
             left,
@@ -252,6 +269,7 @@ impl<T: Num + PartialOrd + Copy> Rect<T> {
         }
     }
 
+    #[inline(always)]
     pub fn new_size(x: T, y: T, width: T, height: T) -> Rect<T> {
         Rect {
             left: x,
@@ -261,15 +279,6 @@ impl<T: Num + PartialOrd + Copy> Rect<T> {
         }
     }
 
-    pub fn from(rect: ggez::graphics::Rect) -> Rect<f32> {
-        Rect {
-            left: rect.x,
-            top: rect.y,
-            right: (rect.x + rect.w),
-            bottom: (rect.y + rect.h),
-        }
-    }
-
     pub fn width(&self) -> T {
         if let Some(Ordering::Greater) = self.left.partial_cmp(&self.right) {
             self.left.sub(self.right)
@@ -287,15 +296,6 @@ impl<T: Num + PartialOrd + Copy> Rect<T> {
     }
 }
 
-impl<T: Num + PartialOrd + Copy + AsPrimitive<f32>> Into<ggez::graphics::Rect> for Rect<T> {
-    fn into(self) -> ggez::graphics::Rect {
-        ggez::graphics::Rect::new(self.left.as_(),
-                                  self.top.as_(),
-                                  self.width().as_(),
-                                  self.height().as_())
-    }
-}
-
 impl<T: Num + PartialOrd + Copy + Serialize> Serialize for Rect<T> {
     fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
         where
@@ -371,3 +371,151 @@ pub fn interpolate_fix9_scale(old_val: i32, val: i32, frame_delta: f64) -> f32 {
 
     (lerp_f64(old_val as f64, val as f64, frame_delta) / 512.0) as f32
 }
+
+
+/// A RGBA color in the `sRGB` color space represented as `f32`'s in the range `[0.0-1.0]`
+///
+/// For convenience, [`WHITE`](constant.WHITE.html) and [`BLACK`](constant.BLACK.html) are provided.
+#[derive(Copy, Clone, PartialEq, Debug, Serialize, Deserialize)]
+pub struct Color {
+    /// Red component
+    pub r: f32,
+    /// Green component
+    pub g: f32,
+    /// Blue component
+    pub b: f32,
+    /// Alpha component
+    pub a: f32,
+}
+
+impl Color {
+    /// Create a new `Color` from four `f32`'s in the range `[0.0-1.0]`
+    pub const fn new(r: f32, g: f32, b: f32, a: f32) -> Self {
+        Color { r, g, b, a }
+    }
+
+    /// Create a new `Color` from four `u8`'s in the range `[0-255]`
+    pub fn from_rgba(r: u8, g: u8, b: u8, a: u8) -> Color {
+        Color::from((r, g, b, a))
+    }
+
+    /// Create a new `Color` from three u8's in the range `[0-255]`,
+    /// with the alpha component fixed to 255 (opaque)
+    pub fn from_rgb(r: u8, g: u8, b: u8) -> Color {
+        Color::from((r, g, b))
+    }
+
+    /// Return a tuple of four `u8`'s in the range `[0-255]` with the `Color`'s
+    /// components.
+    pub fn to_rgba(self) -> (u8, u8, u8, u8) {
+        self.into()
+    }
+
+    /// Return a tuple of three `u8`'s in the range `[0-255]` with the `Color`'s
+    /// components.
+    pub fn to_rgb(self) -> (u8, u8, u8) {
+        self.into()
+    }
+
+    /// Convert a packed `u32` containing `0xRRGGBBAA` into a `Color`
+    pub fn from_rgba_u32(c: u32) -> Color {
+        let c = c.to_be_bytes();
+
+        Color::from((c[0], c[1], c[2], c[3]))
+    }
+
+    /// Convert a packed `u32` containing `0x00RRGGBB` into a `Color`.
+    /// This lets you do things like `Color::from_rgb_u32(0xCD09AA)` easily if you want.
+    pub fn from_rgb_u32(c: u32) -> Color {
+        let c = c.to_be_bytes();
+
+        Color::from((c[1], c[2], c[3]))
+    }
+
+    /// Convert a `Color` into a packed `u32`, containing `0xRRGGBBAA` as bytes.
+    pub fn to_rgba_u32(self) -> u32 {
+        let (r, g, b, a): (u8, u8, u8, u8) = self.into();
+
+        u32::from_be_bytes([r, g, b, a])
+    }
+
+    /// Convert a `Color` into a packed `u32`, containing `0x00RRGGBB` as bytes.
+    pub fn to_rgb_u32(self) -> u32 {
+        let (r, g, b, _a): (u8, u8, u8, u8) = self.into();
+
+        u32::from_be_bytes([0, r, g, b])
+    }
+}
+
+impl From<(u8, u8, u8, u8)> for Color {
+    /// Convert a `(R, G, B, A)` tuple of `u8`'s in the range `[0-255]` into a `Color`
+    fn from(val: (u8, u8, u8, u8)) -> Self {
+        let (r, g, b, a) = val;
+        let rf = (f32::from(r)) / 255.0;
+        let gf = (f32::from(g)) / 255.0;
+        let bf = (f32::from(b)) / 255.0;
+        let af = (f32::from(a)) / 255.0;
+        Color::new(rf, gf, bf, af)
+    }
+}
+
+impl From<(u8, u8, u8)> for Color {
+    /// Convert a `(R, G, B)` tuple of `u8`'s in the range `[0-255]` into a `Color`,
+    /// with a value of 255 for the alpha element (i.e., no transparency.)
+    fn from(val: (u8, u8, u8)) -> Self {
+        let (r, g, b) = val;
+        Color::from((r, g, b, 255))
+    }
+}
+
+impl From<[f32; 4]> for Color {
+    /// Turns an `[R, G, B, A] array of `f32`'s into a `Color` with no format changes.
+    /// All inputs should be in the range `[0.0-1.0]`.
+    fn from(val: [f32; 4]) -> Self {
+        Color::new(val[0], val[1], val[2], val[3])
+    }
+}
+
+impl From<(f32, f32, f32)> for Color {
+    /// Convert a `(R, G, B)` tuple of `f32`'s in the range `[0.0-1.0]` into a `Color`,
+    /// with a value of 1.0 to for the alpha element (ie, no transparency.)
+    fn from(val: (f32, f32, f32)) -> Self {
+        let (r, g, b) = val;
+        Color::new(r, g, b, 1.0)
+    }
+}
+
+impl From<(f32, f32, f32, f32)> for Color {
+    /// Convert a `(R, G, B, A)` tuple of `f32`'s in the range `[0.0-1.0]` into a `Color`
+    fn from(val: (f32, f32, f32, f32)) -> Self {
+        let (r, g, b, a) = val;
+        Color::new(r, g, b, a)
+    }
+}
+
+impl From<Color> for (u8, u8, u8, u8) {
+    /// Convert a `Color` into a `(R, G, B, A)` tuple of `u8`'s in the range of `[0-255]`.
+    fn from(color: Color) -> Self {
+        let r = (color.r * 255.0) as u8;
+        let g = (color.g * 255.0) as u8;
+        let b = (color.b * 255.0) as u8;
+        let a = (color.a * 255.0) as u8;
+        (r, g, b, a)
+    }
+}
+
+impl From<Color> for (u8, u8, u8) {
+    /// Convert a `Color` into a `(R, G, B)` tuple of `u8`'s in the range of `[0-255]`,
+    /// ignoring the alpha term.
+    fn from(color: Color) -> Self {
+        let (r, g, b, _) = color.into();
+        (r, g, b)
+    }
+}
+
+impl From<Color> for [f32; 4] {
+    /// Convert a `Color` into an `[R, G, B, A]` array of `f32`'s in the range of `[0.0-1.0]`.
+    fn from(color: Color) -> Self {
+        [color.r, color.g, color.b, color.a]
+    }
+}

src/components/boss_life_bar.rs

@@ -1,8 +1,8 @@
-use ggez::{Context, GameResult};
-
 use crate::common::Rect;
 use crate::entity::GameEntity;
 use crate::frame::Frame;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 use crate::npc::boss::BossNPC;
 use crate::npc::list::NPCList;
 use crate::shared_game_state::SharedGameState;
@@ -52,7 +52,7 @@ impl BossLifeBar {
 }
 
 impl GameEntity<(&NPCList, &BossNPC)> for BossLifeBar {
-    fn tick(&mut self, _state: &mut SharedGameState, (npc_list, boss): (&NPCList, &BossNPC)) -> GameResult<> {
+    fn tick(&mut self, _state: &mut SharedGameState, (npc_list, boss): (&NPCList, &BossNPC)) -> GameResult<()> {
         match self.target {
             BossLifeTarget::NPC(npc_id) => {
                 if let Some(npc) = npc_list.get_npc(npc_id as usize) {

src/components/draw_common.rs

@@ -1,7 +1,7 @@
-use ggez::{Context, GameResult};
-
 use crate::common::Rect;
 use crate::shared_game_state::SharedGameState;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 
 #[derive(Debug, EnumIter, PartialEq, Eq, Hash, Copy, Clone)]
 pub enum Alignment {

src/components/hud.rs

@@ -1,4 +1,5 @@
-use ggez::{Context, GameResult};
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 
 use crate::common::Rect;
 use crate::components::draw_common::{Alignment, draw_number};

src/components/stage_select.rs

@@ -1,4 +1,5 @@
-use ggez::{Context, GameResult};
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 
 use crate::common::Rect;
 use crate::entity::GameEntity;

src/engine_constants/mod.rs

@@ -216,7 +216,7 @@ pub struct EngineConstants {
     pub world: WorldConsts,
     pub npc: NPCConsts,
     pub weapon: WeaponConsts,
-    pub tex_sizes: CaseInsensitiveHashMap<(usize, usize)>,
+    pub tex_sizes: CaseInsensitiveHashMap<(u16, u16)>,
     pub textscript: TextScriptConsts,
     pub title: TitleConsts,
     pub font_path: String,

src/entity.rs

@@ -1,4 +1,5 @@
-use ggez::{Context, GameResult};
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 
 use crate::frame::Frame;
 use crate::shared_game_state::SharedGameState;

src/framework/backend.rs

@@ -0,0 +1,57 @@
+use imgui::DrawData;
+
+use crate::common::{Color, Point, Rect};
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
+use crate::framework::graphics::BlendMode;
+use crate::Game;
+
+pub trait Backend {
+    fn create_event_loop(&self) -> GameResult<Box<dyn BackendEventLoop>>;
+}
+
+pub trait BackendEventLoop {
+    fn run(&mut self, game: &mut Game, ctx: &mut Context);
+
+    fn new_renderer(&self) -> GameResult<Box<dyn BackendRenderer>>;
+}
+
+pub trait BackendRenderer {
+    fn clear(&mut self, color: Color);
+
+    fn present(&mut self) -> GameResult;
+
+    fn create_texture_mutable(&mut self, width: u16, height: u16) -> GameResult<Box<dyn BackendTexture>>;
+
+    fn create_texture(&mut self, width: u16, height: u16, data: &[u8]) -> GameResult<Box<dyn BackendTexture>>;
+
+    fn set_blend_mode(&mut self, blend: BlendMode) -> GameResult;
+
+    fn set_render_target(&mut self, texture: Option<&Box<dyn BackendTexture>>) -> GameResult;
+
+    fn imgui(&self) -> GameResult<&mut imgui::Context>;
+
+    fn render_imgui(&mut self, draw_data: &DrawData) -> GameResult;
+
+    fn prepare_frame(&self, ui: &imgui::Ui) -> GameResult;
+}
+
+pub trait BackendTexture {
+    fn dimensions(&self) -> (u16, u16);
+
+    fn add(&mut self, command: SpriteBatchCommand);
+
+    fn clear(&mut self);
+
+    fn draw(&mut self) -> GameResult;
+}
+
+pub fn init_backend() -> GameResult<Box<dyn Backend>> {
+    crate::framework::backend_sdl2::SDL2Backend::new()
+}
+
+pub enum SpriteBatchCommand {
+    DrawRect(Rect<f32>, Rect<f32>),
+    DrawRectFlip(Rect<f32>, Rect<f32>, bool, bool),
+    DrawRectTinted(Rect<f32>, Rect<f32>, Color),
+}

src/framework/context.rs

@@ -0,0 +1,33 @@
+use crate::framework::backend::{init_backend, BackendRenderer};
+use crate::framework::error::GameResult;
+use crate::framework::filesystem::Filesystem;
+use crate::Game;
+use crate::framework::keyboard::KeyboardContext;
+
+pub struct Context {
+    pub(crate) filesystem: Filesystem,
+    pub(crate) renderer: Option<Box<dyn BackendRenderer>>,
+    pub(crate) keyboard_context: KeyboardContext,
+    pub(crate) screen_size: (f32, f32),
+}
+
+impl Context {
+    pub fn new() -> Context {
+        Context {
+            filesystem: Filesystem::new(),
+            renderer: None,
+            keyboard_context: KeyboardContext::new(),
+            screen_size: (320.0, 240.0),
+        }
+    }
+
+    pub fn run(&mut self, game: &mut Game) -> GameResult {
+        let backend = init_backend()?;
+        let mut event_loop = backend.create_event_loop()?;
+        self.renderer = Some(event_loop.new_renderer()?);
+
+        event_loop.run(game, self);
+
+        Ok(())
+    }
+}

src/framework/error.rs

@@ -0,0 +1,143 @@
+//! Error types and conversion functions.
+
+
+use std::error::Error;
+use std::fmt;
+use std::string::FromUtf8Error;
+use std::sync::{Arc, PoisonError};
+use std::sync::mpsc::SendError;
+
+/// An enum containing all kinds of game framework errors.
+#[derive(Debug, Clone)]
+pub enum GameError {
+    /// An error in the filesystem layout
+    FilesystemError(String),
+    /// An error in the config file
+    ConfigError(String),
+    /// Happens when an `winit::EventsLoopProxy` attempts to
+    /// wake up an `winit::EventsLoop` that no longer exists.
+    EventLoopError(String),
+    /// An error trying to load a resource, such as getting an invalid image file.
+    ResourceLoadError(String),
+    /// Unable to find a resource; the `Vec` is the paths it searched for and associated errors
+    ResourceNotFound(String, Vec<(std::path::PathBuf, GameError)>),
+    /// Something went wrong in the renderer
+    RenderError(String),
+    /// Something went wrong in the audio playback
+    AudioError(String),
+    /// Something went wrong trying to set or get window properties.
+    WindowError(String),
+    /// Something went wrong trying to read from a file
+    IOError(Arc<std::io::Error>),
+    /// Something went wrong trying to load/render a font
+    FontError(String),
+    /// Something went wrong applying video settings.
+    VideoError(String),
+    /// Something went wrong compiling shaders
+    ShaderProgramError(String),
+    /// Something went wrong with the `gilrs` gamepad-input library.
+    GamepadError(String),
+    /// Something went wrong with the `lyon` shape-tesselation library.
+    LyonError(String),
+    /// Something went wrong while parsing something.
+    ParseError(String),
+    /// Something went wrong while converting a value.
+    InvalidValue(String),
+}
+
+impl fmt::Display for GameError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            GameError::ConfigError(ref s) => write!(f, "Config error: {}", s),
+            GameError::ResourceLoadError(ref s) => write!(f, "Error loading resource: {}", s),
+            GameError::ResourceNotFound(ref s, ref paths) => write!(
+                f,
+                "Resource not found: {}, searched in paths {:?}",
+                s, paths
+            ),
+            GameError::WindowError(ref e) => write!(f, "Window creation error: {}", e),
+            _ => write!(f, "GameError {:?}", self),
+        }
+    }
+}
+
+impl Error for GameError {
+    fn cause(&self) -> Option<&dyn Error> {
+        match *self {
+            GameError::IOError(ref e) => Some(&**e),
+            _ => None,
+        }
+    }
+}
+
+/// A convenient result type consisting of a return type and a `GameError`
+pub type GameResult<T = ()> = Result<T, GameError>;
+
+impl From<std::io::Error> for GameError {
+    fn from(e: std::io::Error) -> GameError {
+        GameError::IOError(Arc::new(e))
+    }
+}
+
+impl From<image::ImageError> for GameError {
+    fn from(e: image::ImageError) -> GameError {
+        let errstr = format!("Image load error: {}", e);
+        GameError::ResourceLoadError(errstr)
+    }
+}
+
+impl From<std::string::FromUtf8Error> for GameError {
+    fn from(e: FromUtf8Error) -> Self {
+        let errstr = format!("UTF-8 decoding error: {:?}", e);
+        GameError::ConfigError(errstr)
+    }
+}
+
+#[cfg(target_os = "android")]
+impl From<jni::errors::Error> for GameError {
+    fn from(e: jni::errors::Error) -> GameError {
+        GameError::WindowError(e.to_string())
+    }
+}
+
+impl From<strum::ParseError> for GameError {
+    fn from(s: strum::ParseError) -> GameError {
+        let errstr = format!("Strum parse error: {}", s);
+        GameError::ParseError(errstr)
+    }
+}
+
+impl From<cpal::DefaultStreamConfigError> for GameError {
+    fn from(s: cpal::DefaultStreamConfigError) -> GameError {
+        let errstr = format!("Default stream config error: {}", s);
+        GameError::AudioError(errstr)
+    }
+}
+
+impl From<cpal::PlayStreamError> for GameError {
+    fn from(s: cpal::PlayStreamError) -> GameError {
+        let errstr = format!("Play stream error: {}", s);
+        GameError::AudioError(errstr)
+    }
+}
+
+impl From<cpal::BuildStreamError> for GameError {
+    fn from(s: cpal::BuildStreamError) -> GameError {
+        let errstr = format!("Build stream error: {}", s);
+        GameError::AudioError(errstr)
+    }
+}
+
+impl<T> From<PoisonError<T>> for GameError {
+    fn from(s: PoisonError<T>) -> GameError {
+        let errstr = format!("Poison error: {}", s);
+        GameError::EventLoopError(errstr)
+    }
+}
+
+impl<T> From<SendError<T>> for GameError {
+    fn from(s: SendError<T>) -> GameError {
+        let errstr = format!("Send error: {}", s);
+        GameError::EventLoopError(errstr)
+    }
+}

src/framework/filesystem.rs

@@ -0,0 +1,367 @@
+use std::env;
+use std::fmt;
+use std::io;
+use std::io::SeekFrom;
+use std::path;
+use std::path::PathBuf;
+
+use directories::ProjectDirs;
+use crate::framework::vfs;
+use crate::framework::vfs::{VFS, OpenOptions};
+use crate::framework::error::{GameResult, GameError};
+use crate::framework::context::Context;
+
+/// A structure that contains the filesystem state and cache.
+#[derive(Debug)]
+pub struct Filesystem {
+    vfs: vfs::OverlayFS,
+    user_vfs: vfs::OverlayFS,
+}
+
+/// Represents a file, either in the filesystem, or in the resources zip file,
+/// or whatever.
+pub enum File {
+    /// A wrapper for a VFile trait object.
+    VfsFile(Box<dyn vfs::VFile>),
+}
+
+impl fmt::Debug for File {
+    // Make this more useful?
+    // But we can't seem to get a filename out of a file,
+    // soooooo.
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            File::VfsFile(ref _file) => write!(f, "VfsFile"),
+        }
+    }
+}
+
+impl io::Read for File {
+    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+        match *self {
+            File::VfsFile(ref mut f) => f.read(buf),
+        }
+    }
+}
+
+impl io::Write for File {
+    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+        match *self {
+            File::VfsFile(ref mut f) => f.write(buf),
+        }
+    }
+
+    fn flush(&mut self) -> io::Result<()> {
+        match *self {
+            File::VfsFile(ref mut f) => f.flush(),
+        }
+    }
+}
+
+impl io::Seek for File {
+    fn seek(&mut self, pos: SeekFrom) -> io::Result<u64> {
+        match *self {
+            File::VfsFile(ref mut f) => f.seek(pos),
+        }
+    }
+}
+
+impl Filesystem {
+    pub fn new() -> Filesystem {
+        // Set up VFS to merge resource path, root path, and zip path.
+        let overlay = vfs::OverlayFS::new();
+        // User data VFS.
+        let user_overlay = vfs::OverlayFS::new();
+
+        Filesystem {
+            vfs: overlay,
+            user_vfs: user_overlay,
+        }
+    }
+
+    /// Opens the given `path` and returns the resulting `File`
+    /// in read-only mode.
+    pub(crate) fn open<P: AsRef<path::Path>>(&mut self, path: P) -> GameResult<File> {
+        self.vfs.open(path.as_ref()).map(|f| File::VfsFile(f))
+    }
+
+    /// Opens the given `path` from user directory and returns the resulting `File`
+    /// in read-only mode.
+    pub(crate) fn user_open<P: AsRef<path::Path>>(&mut self, path: P) -> GameResult<File> {
+        self.user_vfs.open(path.as_ref()).map(|f| File::VfsFile(f))
+    }
+
+    /// Opens a file in the user directory with the given
+    /// [`filesystem::OpenOptions`](struct.OpenOptions.html).
+    /// Note that even if you open a file read-write, it can only
+    /// write to files in the "user" directory.
+    pub(crate) fn open_options<P: AsRef<path::Path>>(
+        &mut self,
+        path: P,
+        options: OpenOptions,
+    ) -> GameResult<File> {
+        self.user_vfs
+            .open_options(path.as_ref(), options)
+            .map(|f| File::VfsFile(f))
+            .map_err(|e| {
+                GameError::ResourceLoadError(format!(
+                    "Tried to open {:?} but got error: {:?}",
+                    path.as_ref(),
+                    e
+                ))
+            })
+    }
+
+    /// Creates a new file in the user directory and opens it
+    /// to be written to, truncating it if it already exists.
+    pub(crate) fn user_create<P: AsRef<path::Path>>(&mut self, path: P) -> GameResult<File> {
+        self.user_vfs.create(path.as_ref()).map(|f| File::VfsFile(f))
+    }
+
+    /// Create an empty directory in the user dir
+    /// with the given name.  Any parents to that directory
+    /// that do not exist will be created.
+    pub(crate) fn user_create_dir<P: AsRef<path::Path>>(&mut self, path: P) -> GameResult<()> {
+        self.user_vfs.mkdir(path.as_ref())
+    }
+
+    /// Deletes the specified file in the user dir.
+    pub(crate) fn user_delete<P: AsRef<path::Path>>(&mut self, path: P) -> GameResult<()> {
+        self.user_vfs.rm(path.as_ref())
+    }
+
+    /// Deletes the specified directory in the user dir,
+    /// and all its contents!
+    pub(crate) fn user_delete_dir<P: AsRef<path::Path>>(&mut self, path: P) -> GameResult<()> {
+        self.user_vfs.rmrf(path.as_ref())
+    }
+
+    /// Check whether a file or directory in the user directory exists.
+    pub(crate) fn user_exists<P: AsRef<path::Path>>(&self, path: P) -> bool {
+        self.user_vfs.exists(path.as_ref())
+    }
+
+    /// Check whether a file or directory exists.
+    pub(crate) fn exists<P: AsRef<path::Path>>(&self, path: P) -> bool {
+        self.vfs.exists(path.as_ref())
+    }
+
+    /// Check whether a path points at a file.
+    pub(crate) fn user_is_file<P: AsRef<path::Path>>(&self, path: P) -> bool {
+        self.user_vfs
+            .metadata(path.as_ref())
+            .map(|m| m.is_file())
+            .unwrap_or(false)
+    }
+
+    /// Check whether a path points at a file.
+    pub(crate) fn is_file<P: AsRef<path::Path>>(&self, path: P) -> bool {
+        self.vfs
+            .metadata(path.as_ref())
+            .map(|m| m.is_file())
+            .unwrap_or(false)
+    }
+
+    /// Check whether a path points at a directory.
+    pub(crate) fn user_is_dir<P: AsRef<path::Path>>(&self, path: P) -> bool {
+        self.user_vfs
+            .metadata(path.as_ref())
+            .map(|m| m.is_dir())
+            .unwrap_or(false)
+    }
+
+    /// Check whether a path points at a directory.
+    pub(crate) fn is_dir<P: AsRef<path::Path>>(&self, path: P) -> bool {
+        self.vfs
+            .metadata(path.as_ref())
+            .map(|m| m.is_dir())
+            .unwrap_or(false)
+    }
+
+    /// Returns a list of all files and directories in the user directory,
+    /// in no particular order.
+    ///
+    /// Lists the base directory if an empty path is given.
+    pub(crate) fn user_read_dir<P: AsRef<path::Path>>(
+        &mut self,
+        path: P,
+    ) -> GameResult<Box<dyn Iterator<Item=path::PathBuf>>> {
+        let itr = self.user_vfs.read_dir(path.as_ref())?.map(|fname| {
+            fname.expect("Could not read file in read_dir()?  Should never happen, I hope!")
+        });
+        Ok(Box::new(itr))
+    }
+
+    /// Returns a list of all files and directories in the resource directory,
+    /// in no particular order.
+    ///
+    /// Lists the base directory if an empty path is given.
+    pub(crate) fn read_dir<P: AsRef<path::Path>>(
+        &mut self,
+        path: P,
+    ) -> GameResult<Box<dyn Iterator<Item=path::PathBuf>>> {
+        let itr = self.vfs.read_dir(path.as_ref())?.map(|fname| {
+            fname.expect("Could not read file in read_dir()?  Should never happen, I hope!")
+        });
+        Ok(Box::new(itr))
+    }
+
+    fn write_to_string(&mut self) -> String {
+        use std::fmt::Write;
+        let mut s = String::new();
+        for vfs in self.vfs.roots() {
+            write!(s, "Source {:?}", vfs).expect("Could not write to string; should never happen?");
+            match vfs.read_dir(path::Path::new("/")) {
+                Ok(files) => {
+                    for itm in files {
+                        write!(s, "  {:?}", itm)
+                            .expect("Could not write to string; should never happen?");
+                    }
+                }
+                Err(e) => write!(s, " Could not read source: {:?}", e)
+                    .expect("Could not write to string; should never happen?"),
+            }
+        }
+        s
+    }
+
+    /// Adds the given (absolute) path to the list of directories
+    /// it will search to look for resources.
+    ///
+    /// You probably shouldn't use this in the general case, since it is
+    /// harder than it looks to make it bulletproof across platforms.
+    /// But it can be very nice for debugging and dev purposes, such as
+    /// by pushing `$CARGO_MANIFEST_DIR/resources` to it
+    pub fn mount(&mut self, path: &path::Path, readonly: bool) {
+        let physfs = vfs::PhysicalFS::new(path, readonly);
+        trace!("Mounting new path: {:?}", physfs);
+        self.vfs.push_back(Box::new(physfs));
+    }
+
+    pub fn mount_vfs(&mut self, vfs: Box<dyn vfs::VFS>) {
+        self.vfs.push_back(vfs);
+    }
+
+
+    pub fn mount_user_vfs(&mut self, vfs: Box<dyn vfs::VFS>) {
+        self.user_vfs.push_back(vfs);
+    }
+}
+
+/// Opens the given path and returns the resulting `File`
+/// in read-only mode.
+pub fn open<P: AsRef<path::Path>>(ctx: &mut Context, path: P) -> GameResult<File> {
+    ctx.filesystem.open(path)
+}
+
+/// Opens the given path in the user directory and returns the resulting `File`
+/// in read-only mode.
+pub fn user_open<P: AsRef<path::Path>>(ctx: &mut Context, path: P) -> GameResult<File> {
+    ctx.filesystem.user_open(path)
+}
+
+/// Opens a file in the user directory with the given `filesystem::OpenOptions`.
+pub fn open_options<P: AsRef<path::Path>>(
+    ctx: &mut Context,
+    path: P,
+    options: OpenOptions,
+) -> GameResult<File> {
+    ctx.filesystem.open_options(path, options)
+}
+
+/// Creates a new file in the user directory and opens it
+/// to be written to, truncating it if it already exists.
+pub fn user_create<P: AsRef<path::Path>>(ctx: &mut Context, path: P) -> GameResult<File> {
+    ctx.filesystem.user_create(path)
+}
+
+/// Create an empty directory in the user dir
+/// with the given name.  Any parents to that directory
+/// that do not exist will be created.
+pub fn user_create_dir<P: AsRef<path::Path>>(ctx: &mut Context, path: P) -> GameResult {
+    ctx.filesystem.user_create_dir(path.as_ref())
+}
+
+/// Deletes the specified file in the user dir.
+pub fn user_delete<P: AsRef<path::Path>>(ctx: &mut Context, path: P) -> GameResult {
+    ctx.filesystem.user_delete(path.as_ref())
+}
+
+/// Deletes the specified directory in the user dir,
+/// and all its contents!
+pub fn user_delete_dir<P: AsRef<path::Path>>(ctx: &mut Context, path: P) -> GameResult {
+    ctx.filesystem.user_delete_dir(path.as_ref())
+}
+
+/// Check whether a file or directory exists.
+pub fn user_exists<P: AsRef<path::Path>>(ctx: &Context, path: P) -> bool {
+    ctx.filesystem.user_exists(path.as_ref())
+}
+
+/// Check whether a path points at a file.
+pub fn user_is_file<P: AsRef<path::Path>>(ctx: &Context, path: P) -> bool {
+    ctx.filesystem.user_is_file(path)
+}
+
+/// Check whether a path points at a directory.
+pub fn user_is_dir<P: AsRef<path::Path>>(ctx: &Context, path: P) -> bool {
+    ctx.filesystem.user_is_dir(path)
+}
+
+/// Returns a list of all files and directories in the user directory,
+/// in no particular order.
+///
+/// Lists the base directory if an empty path is given.
+pub fn user_read_dir<P: AsRef<path::Path>>(
+    ctx: &mut Context,
+    path: P,
+) -> GameResult<Box<dyn Iterator<Item=path::PathBuf>>> {
+    ctx.filesystem.user_read_dir(path)
+}
+
+/// Check whether a file or directory exists.
+pub fn exists<P: AsRef<path::Path>>(ctx: &Context, path: P) -> bool {
+    ctx.filesystem.exists(path.as_ref())
+}
+
+/// Check whether a path points at a file.
+pub fn is_file<P: AsRef<path::Path>>(ctx: &Context, path: P) -> bool {
+    ctx.filesystem.is_file(path)
+}
+
+/// Check whether a path points at a directory.
+pub fn is_dir<P: AsRef<path::Path>>(ctx: &Context, path: P) -> bool {
+    ctx.filesystem.is_dir(path)
+}
+
+/// Returns a list of all files and directories in the resource directory,
+/// in no particular order.
+///
+/// Lists the base directory if an empty path is given.
+pub fn read_dir<P: AsRef<path::Path>>(
+    ctx: &mut Context,
+    path: P,
+) -> GameResult<Box<dyn Iterator<Item=path::PathBuf>>> {
+    ctx.filesystem.read_dir(path)
+}
+
+/// Adds the given (absolute) path to the list of directories
+/// it will search to look for resources.
+///
+/// You probably shouldn't use this in the general case, since it is
+/// harder than it looks to make it bulletproof across platforms.
+/// But it can be very nice for debugging and dev purposes, such as
+/// by pushing `$CARGO_MANIFEST_DIR/resources` to it
+pub fn mount(ctx: &mut Context, path: &path::Path, readonly: bool) {
+    ctx.filesystem.mount(path, readonly)
+}
+
+/// Adds a VFS to the list of resource search locations.
+pub fn mount_vfs(ctx: &mut Context, vfs: Box<dyn vfs::VFS>) {
+    ctx.filesystem.mount_vfs(vfs)
+}
+
+/// Adds a VFS to the list of user data search locations.
+pub fn mount_user_vfs(ctx: &mut Context, vfs: Box<dyn vfs::VFS>) {
+    ctx.filesystem.mount_user_vfs(vfs)
+}

src/framework/graphics.rs

@@ -0,0 +1,101 @@
+use crate::common::Color;
+use crate::framework::context::Context;
+use crate::framework::error::{GameResult, GameError};
+use crate::framework::backend::BackendTexture;
+
+pub enum FilterMode {
+    Nearest,
+    Linear,
+}
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
+pub enum BlendMode {
+    /// When combining two fragments, add their values together, saturating
+    /// at 1.0
+    Add,
+    /// When combining two fragments, add the value of the source times its
+    /// alpha channel with the value of the destination multiplied by the inverse
+    /// of the source alpha channel. Has the usual transparency effect: mixes the
+    /// two colors using a fraction of each one specified by the alpha of the source.
+    Alpha,
+    /// When combining two fragments, multiply their values together.
+    Multiply,
+}
+
+pub fn clear(ctx: &mut Context, color: Color) {
+    if let Some(renderer) = ctx.renderer.as_mut() {
+        renderer.clear(color)
+    }
+}
+
+pub fn present(ctx: &mut Context) -> GameResult {
+    if let Some(renderer) = ctx.renderer.as_mut() {
+        renderer.present()?;
+    }
+
+    Ok(())
+}
+
+pub fn renderer_initialized(ctx: &mut Context) -> bool {
+    ctx.renderer.is_some()
+}
+
+pub fn create_texture_mutable(ctx: &mut Context, width: u16, height: u16) -> GameResult<Box<dyn BackendTexture>> {
+    if let Some(renderer) = ctx.renderer.as_mut() {
+        return renderer.create_texture_mutable(width, height);
+    }
+
+    Err(GameError::RenderError("Rendering backend hasn't been initialized yet.".to_string()))
+}
+
+pub fn create_texture(ctx: &mut Context, width: u16, height: u16, data: &[u8]) -> GameResult<Box<dyn BackendTexture>> {
+    if let Some(renderer) = ctx.renderer.as_mut() {
+        return renderer.create_texture(width, height, data);
+    }
+
+    Err(GameError::RenderError("Rendering backend hasn't been initialized yet.".to_string()))
+}
+
+pub fn screen_size(ctx: &mut Context) -> (f32, f32) {
+    ctx.screen_size
+}
+
+pub fn set_render_target(ctx: &mut Context, texture: Option<&Box<dyn BackendTexture>>) -> GameResult {
+    if let Some(renderer) = ctx.renderer.as_mut() {
+        return renderer.set_render_target(texture);
+    }
+
+    Err(GameError::RenderError("Rendering backend hasn't been initialized yet.".to_string()))
+}
+
+pub fn set_blend_mode(ctx: &mut Context, blend: BlendMode) -> GameResult {
+    if let Some(renderer) = ctx.renderer.as_mut() {
+        return renderer.set_blend_mode(blend);
+    }
+
+    Err(GameError::RenderError("Rendering backend hasn't been initialized yet.".to_string()))
+}
+
+pub fn imgui_context(ctx: &Context) -> GameResult<&mut imgui::Context> {
+    if let Some(renderer) = ctx.renderer.as_ref() {
+        return renderer.imgui();
+    }
+
+    Err(GameError::RenderError("Rendering backend hasn't been initialized yet.".to_string()))
+}
+
+pub fn render_imgui(ctx: &mut Context, draw_data: &imgui::DrawData) -> GameResult {
+    if let Some(renderer) = ctx.renderer.as_mut() {
+        return renderer.render_imgui(draw_data);
+    }
+
+    Err(GameError::RenderError("Rendering backend hasn't been initialized yet.".to_string()))
+}
+
+pub fn imgui_prepare_frame(ctx: &Context, ui: &imgui::Ui) -> GameResult {
+    if let Some(renderer) = ctx.renderer.as_ref() {
+        return renderer.prepare_frame(ui);
+    }
+
+    Err(GameError::RenderError("Rendering backend hasn't been initialized yet.".to_string()))
+}

src/framework/keyboard.rs

@@ -0,0 +1,345 @@
+use std::collections::HashSet;
+
+use serde::{Deserialize, Serialize};
+
+use crate::bitfield;
+use crate::framework::context::Context;
+
+#[derive(Debug, Hash, Ord, PartialOrd, PartialEq, Eq, Clone, Copy)]
+#[derive(Serialize, Deserialize)]
+#[repr(u32)]
+pub enum ScanCode {
+    /// The '1' key over the letters.
+    Key1,
+    /// The '2' key over the letters.
+    Key2,
+    /// The '3' key over the letters.
+    Key3,
+    /// The '4' key over the letters.
+    Key4,
+    /// The '5' key over the letters.
+    Key5,
+    /// The '6' key over the letters.
+    Key6,
+    /// The '7' key over the letters.
+    Key7,
+    /// The '8' key over the letters.
+    Key8,
+    /// The '9' key over the letters.
+    Key9,
+    /// The '0' key over the 'O' and 'P' keys.
+    Key0,
+
+    A,
+    B,
+    C,
+    D,
+    E,
+    F,
+    G,
+    H,
+    I,
+    J,
+    K,
+    L,
+    M,
+    N,
+    O,
+    P,
+    Q,
+    R,
+    S,
+    T,
+    U,
+    V,
+    W,
+    X,
+    Y,
+    Z,
+
+    /// The Escape key, next to F1.
+    Escape,
+
+    F1,
+    F2,
+    F3,
+    F4,
+    F5,
+    F6,
+    F7,
+    F8,
+    F9,
+    F10,
+    F11,
+    F12,
+    F13,
+    F14,
+    F15,
+    F16,
+    F17,
+    F18,
+    F19,
+    F20,
+    F21,
+    F22,
+    F23,
+    F24,
+
+    /// Print Screen/SysRq.
+    Snapshot,
+    /// Scroll Lock.
+    Scroll,
+    /// Pause/Break key, next to Scroll lock.
+    Pause,
+
+    /// `Insert`, next to Backspace.
+    Insert,
+    Home,
+    Delete,
+    End,
+    PageDown,
+    PageUp,
+
+    Left,
+    Up,
+    Right,
+    Down,
+
+    /// The Backspace key, right over Enter.
+    Backspace,
+    /// The Enter key.
+    Return,
+    /// The space bar.
+    Space,
+
+    /// The "Compose" key on Linux.
+    Compose,
+
+    NonUsHash,
+    NonUsBackslash,
+    Caret,
+
+    Numlock,
+    Numpad0,
+    Numpad1,
+    Numpad2,
+    Numpad3,
+    Numpad4,
+    Numpad5,
+    Numpad6,
+    Numpad7,
+    Numpad8,
+    Numpad9,
+    NumpadAdd,
+    NumpadDivide,
+    NumpadDecimal,
+    NumpadComma,
+    NumpadEnter,
+    NumpadEquals,
+    NumpadMultiply,
+    NumpadSubtract,
+
+    AbntC1,
+    AbntC2,
+    Apostrophe,
+    Apps,
+    Asterisk,
+    At,
+    Ax,
+    Backslash,
+    Calculator,
+    Capital,
+    Capslock,
+    Colon,
+    Comma,
+    Convert,
+    Equals,
+    Grave,
+    Kana,
+    Kanji,
+    LAlt,
+    LBracket,
+    LControl,
+    LShift,
+    LWin,
+    Mail,
+    MediaSelect,
+    MediaStop,
+    Minus,
+    Mute,
+    MyComputer,
+    // also called "Next"
+    NavigateForward,
+    // also called "Prior"
+    NavigateBackward,
+    NextTrack,
+    NoConvert,
+    OEM102,
+    Period,
+    PlayPause,
+    Plus,
+    Power,
+    PrevTrack,
+    RAlt,
+    RBracket,
+    RControl,
+    RShift,
+    RWin,
+    Scrolllock,
+    Semicolon,
+    Slash,
+    Sleep,
+    Stop,
+    Sysrq,
+    Tab,
+    Underline,
+    Unlabeled,
+    VolumeDown,
+    VolumeUp,
+    Wake,
+    WebBack,
+    WebFavorites,
+    WebForward,
+    WebHome,
+    WebRefresh,
+    WebSearch,
+    WebStop,
+    Yen,
+    Copy,
+    Paste,
+    Cut,
+}
+
+bitfield! {
+    /// Bitflags describing the state of keyboard modifiers, such as `Control` or `Shift`.
+    #[derive(Debug, Copy, Clone)]
+    pub struct KeyMods(u8);
+
+    /// No modifiers; equivalent to `KeyMods::default()` and
+    /// [`KeyMods::empty()`](struct.KeyMods.html#method.empty).
+    /// Left or right Shift key.
+    pub shift, set_shift: 0;
+    /// Left or right Control key.
+    pub ctrl, set_ctrl: 1;
+    /// Left or right Alt key.
+    pub alt, set_alt: 2;
+    /// Left or right Win/Cmd/equivalent key.
+    pub win, set_win: 3;
+}
+
+#[derive(Clone, Debug)]
+pub struct KeyboardContext {
+    active_modifiers: KeyMods,
+    pressed_keys_set: HashSet<ScanCode>,
+    last_pressed: Option<ScanCode>,
+    current_pressed: Option<ScanCode>,
+}
+
+impl KeyboardContext {
+    pub(crate) fn new() -> Self {
+        Self {
+            active_modifiers: KeyMods(0),
+            pressed_keys_set: HashSet::with_capacity(256),
+            last_pressed: None,
+            current_pressed: None,
+        }
+    }
+
+    pub(crate) fn set_key(&mut self, key: ScanCode, pressed: bool) {
+        if pressed {
+            let _ = self.pressed_keys_set.insert(key);
+            self.last_pressed = self.current_pressed;
+            self.current_pressed = Some(key);
+        } else {
+            let _ = self.pressed_keys_set.remove(&key);
+            self.current_pressed = None;
+        }
+
+        self.set_key_modifier(key, pressed);
+    }
+
+    /// Take a modifier key code and alter our state.
+    ///
+    /// Double check that this edge handling is necessary;
+    /// winit sounds like it should do this for us,
+    /// see https://docs.rs/winit/0.18.0/winit/struct.KeyboardInput.html#structfield.modifiers
+    ///
+    /// ...more specifically, we should refactor all this to consistant-ify events a bit and
+    /// make winit do more of the work.
+    /// But to quote Scott Pilgrim, "This is... this is... Booooooring."
+    fn set_key_modifier(&mut self, key: ScanCode, pressed: bool) {
+        if pressed {
+            match key {
+                ScanCode::LShift | ScanCode::RShift => self.active_modifiers.set_shift(true),
+                ScanCode::LControl | ScanCode::RControl => self.active_modifiers.set_ctrl(true),
+                ScanCode::LAlt | ScanCode::RAlt => self.active_modifiers.set_alt(true),
+                ScanCode::LWin | ScanCode::RWin => self.active_modifiers.set_win(true),
+                _ => (),
+            }
+        } else {
+            match key {
+                ScanCode::LShift | ScanCode::RShift => self.active_modifiers.set_shift(false),
+                ScanCode::LControl | ScanCode::RControl => self.active_modifiers.set_ctrl(false),
+                ScanCode::LAlt | ScanCode::RAlt => self.active_modifiers.set_alt(false),
+                ScanCode::LWin | ScanCode::RWin => self.active_modifiers.set_win(false),
+                _ => (),
+            }
+        }
+    }
+
+    pub(crate) fn set_modifiers(&mut self, keymods: KeyMods) {
+        self.active_modifiers = keymods;
+    }
+
+    pub(crate) fn is_key_pressed(&self, key: ScanCode) -> bool {
+        self.pressed_keys_set.contains(&key)
+    }
+
+    pub(crate) fn is_key_repeated(&self) -> bool {
+        if self.last_pressed.is_some() {
+            self.last_pressed == self.current_pressed
+        } else {
+            false
+        }
+    }
+
+    pub(crate) fn pressed_keys(&self) -> &HashSet<ScanCode> {
+        &self.pressed_keys_set
+    }
+
+    pub(crate) fn active_mods(&self) -> KeyMods {
+        self.active_modifiers
+    }
+}
+
+impl Default for KeyboardContext {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+/// Checks if a key is currently pressed down.
+pub fn is_key_pressed(ctx: &Context, key: ScanCode) -> bool {
+    ctx.keyboard_context.is_key_pressed(key)
+}
+
+/// Checks if the last keystroke sent by the system is repeated,
+/// like when a key is held down for a period of time.
+pub fn is_key_repeated(ctx: &Context) -> bool {
+    ctx.keyboard_context.is_key_repeated()
+}
+
+/// Returns a reference to the set of currently pressed keys.
+pub fn pressed_keys(ctx: &Context) -> &HashSet<ScanCode> {
+    ctx.keyboard_context.pressed_keys()
+}
+
+/// Checks if keyboard modifier (or several) is active.
+pub fn is_mod_active(ctx: &Context, keymods: KeyMods) -> bool {
+    (ctx.keyboard_context.active_mods().0 & keymods.0) != 0
+}
+
+/// Returns currently active keyboard modifiers.
+pub fn active_mods(ctx: &Context) -> KeyMods {
+    ctx.keyboard_context.active_mods()
+}

src/framework/mod.rs

@@ -0,0 +1,10 @@
+pub mod backend;
+pub mod backend_sdl2;
+pub mod backend_null;
+pub mod context;
+pub mod error;
+pub mod filesystem;
+pub mod graphics;
+pub mod keyboard;
+pub mod ui;
+pub mod vfs;

src/framework/ui.rs

@@ -0,0 +1,136 @@
+use std::time::Instant;
+
+use imgui::{FontConfig, FontSource};
+use imgui::sys::*;
+
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
+use crate::framework::graphics::{imgui_context, render_imgui};
+use crate::live_debugger::LiveDebugger;
+use crate::scene::Scene;
+use crate::shared_game_state::SharedGameState;
+
+pub struct UI {
+    pub components: Components,
+    last_frame: Instant,
+}
+
+pub struct Components {
+    pub live_debugger: LiveDebugger,
+}
+
+pub fn init_imgui() -> GameResult<imgui::Context> {
+    let mut imgui = imgui::Context::create();
+    imgui.set_ini_filename(None);
+    imgui.fonts().add_font(&[
+        FontSource::DefaultFontData {
+            config: Some(FontConfig::default()),
+        },
+    ]);
+
+    imgui.style_mut().window_padding = [4.0, 6.0];
+    imgui.style_mut().frame_padding = [8.0, 6.0];
+    imgui.style_mut().item_spacing = [8.0, 6.0];
+    imgui.style_mut().item_inner_spacing = [8.0, 6.0];
+    imgui.style_mut().indent_spacing = 20.0;
+
+    imgui.style_mut().scrollbar_size = 20.0;
+    imgui.style_mut().grab_min_size = 8.0;
+    imgui.style_mut().window_border_size = 0.0;
+    imgui.style_mut().child_border_size = 0.0;
+    imgui.style_mut().popup_border_size = 0.0;
+    imgui.style_mut().frame_border_size = 0.0;
+    imgui.style_mut().tab_border_size = 0.0;
+
+    imgui.style_mut().window_rounding = 0.0;
+    imgui.style_mut().child_rounding = 0.0;
+    imgui.style_mut().frame_rounding = 0.0;
+    imgui.style_mut().popup_rounding = 0.0;
+    imgui.style_mut().scrollbar_rounding = 0.0;
+    imgui.style_mut().grab_rounding = 0.0;
+    imgui.style_mut().tab_rounding = 0.0;
+
+    imgui.style_mut().window_title_align = [0.50, 0.50];
+    imgui.style_mut().window_rounding = 0.0;
+
+    let colors = &mut imgui.style_mut().colors;
+    colors[ImGuiCol_Text as usize] = [0.90, 0.90, 0.90, 1.00];
+    colors[ImGuiCol_TextDisabled as usize] = [0.50, 0.50, 0.50, 1.00];
+    colors[ImGuiCol_WindowBg as usize] = [0.05, 0.05, 0.05, 0.60];
+    colors[ImGuiCol_ChildBg as usize] = [0.05, 0.05, 0.05, 0.60];
+    colors[ImGuiCol_PopupBg as usize] = [0.00, 0.00, 0.00, 0.60];
+    colors[ImGuiCol_Border as usize] = [0.40, 0.40, 0.40, 1.00];
+    colors[ImGuiCol_BorderShadow as usize] = [1.00, 1.00, 1.00, 0.00];
+    colors[ImGuiCol_FrameBg as usize] = [0.00, 0.00, 0.00, 0.60];
+    colors[ImGuiCol_FrameBgHovered as usize] = [0.84, 0.37, 0.00, 0.20];
+    colors[ImGuiCol_FrameBgActive as usize] = [0.84, 0.37, 0.00, 1.00];
+    colors[ImGuiCol_TitleBg as usize] = [0.06, 0.06, 0.06, 1.00];
+    colors[ImGuiCol_TitleBgActive as usize] = [0.00, 0.00, 0.00, 1.00];
+    colors[ImGuiCol_TitleBgCollapsed as usize] = [0.06, 0.06, 0.06, 0.40];
+    colors[ImGuiCol_MenuBarBg as usize] = [0.14, 0.14, 0.14, 1.00];
+    colors[ImGuiCol_ScrollbarBg as usize] = [0.14, 0.14, 0.14, 0.40];
+    colors[ImGuiCol_ScrollbarGrab as usize] = [0.31, 0.31, 0.31, 0.30];
+    colors[ImGuiCol_ScrollbarGrabHovered as usize] = [1.00, 1.00, 1.00, 0.30];
+    colors[ImGuiCol_ScrollbarGrabActive as usize] = [1.00, 1.00, 1.00, 0.50];
+    colors[ImGuiCol_CheckMark as usize] = [0.90, 0.90, 0.90, 1.00];
+    colors[ImGuiCol_SliderGrab as usize] = [0.31, 0.31, 0.31, 1.00];
+    colors[ImGuiCol_SliderGrabActive as usize] = [1.00, 1.00, 1.00, 0.50];
+    colors[ImGuiCol_Button as usize] = [0.14, 0.14, 0.14, 1.00];
+    colors[ImGuiCol_ButtonHovered as usize] = [0.84, 0.37, 0.00, 0.20];
+    colors[ImGuiCol_ButtonActive as usize] = [0.84, 0.37, 0.00, 1.00];
+    colors[ImGuiCol_Header as usize] = [0.14, 0.14, 0.14, 1.00];
+    colors[ImGuiCol_HeaderHovered as usize] = [0.84, 0.37, 0.00, 0.20];
+    colors[ImGuiCol_HeaderActive as usize] = [0.84, 0.37, 0.00, 1.00];
+    colors[ImGuiCol_Separator as usize] = [0.50, 0.50, 0.43, 0.50];
+    colors[ImGuiCol_SeparatorHovered as usize] = [0.75, 0.45, 0.10, 0.78];
+    colors[ImGuiCol_SeparatorActive as usize] = [0.75, 0.45, 0.10, 1.00];
+    colors[ImGuiCol_ResizeGrip as usize] = [0.98, 0.65, 0.26, 0.25];
+    colors[ImGuiCol_ResizeGripHovered as usize] = [0.98, 0.65, 0.26, 0.67];
+    colors[ImGuiCol_ResizeGripActive as usize] = [0.98, 0.65, 0.26, 0.95];
+    colors[ImGuiCol_Tab as usize] = [0.17, 0.10, 0.04, 0.94];
+    colors[ImGuiCol_TabHovered as usize] = [0.84, 0.37, 0.00, 0.60];
+    colors[ImGuiCol_TabActive as usize] = [0.67, 0.30, 0.00, 0.68];
+    colors[ImGuiCol_TabUnfocused as usize] = [0.06, 0.05, 0.05, 0.69];
+    colors[ImGuiCol_TabUnfocusedActive as usize] = [0.36, 0.17, 0.03, 0.64];
+    colors[ImGuiCol_PlotLines as usize] = [0.39, 0.39, 0.39, 1.00];
+    colors[ImGuiCol_PlotLinesHovered as usize] = [0.35, 0.92, 1.00, 1.00];
+    colors[ImGuiCol_PlotHistogram as usize] = [0.00, 0.20, 0.90, 1.00];
+    colors[ImGuiCol_PlotHistogramHovered as usize] = [0.00, 0.40, 1.00, 1.00];
+    colors[ImGuiCol_TextSelectedBg as usize] = [0.98, 0.65, 0.26, 0.35];
+    colors[ImGuiCol_DragDropTarget as usize] = [0.00, 0.00, 1.00, 0.90];
+    colors[ImGuiCol_NavHighlight as usize] = [0.98, 0.65, 0.26, 1.00];
+    colors[ImGuiCol_NavWindowingHighlight as usize] = [0.00, 0.00, 0.00, 0.70];
+    colors[ImGuiCol_NavWindowingDimBg as usize] = [0.20, 0.20, 0.20, 0.20];
+    colors[ImGuiCol_ModalWindowDimBg as usize] = [0.20, 0.20, 0.20, 0.35];
+
+    Ok(imgui)
+}
+
+impl UI {
+    pub fn new(ctx: &mut Context) -> GameResult<Self> {
+        Ok(Self {
+            components: Components {
+                live_debugger: LiveDebugger::new(),
+            },
+            last_frame: Instant::now(),
+        })
+    }
+
+    pub fn draw(&mut self, state: &mut SharedGameState, ctx: &mut Context, scene: &mut Box<dyn Scene>) -> GameResult {
+        let ctx2 = unsafe { &mut *(ctx as *const Context as *mut Context)};
+        let imgui = imgui_context(ctx)?;
+        let io = imgui.io_mut();
+        let now = Instant::now();
+        io.update_delta_time(now - self.last_frame);
+        self.last_frame = now;
+
+        let mut ui = imgui.frame();
+
+        scene.debug_overlay_draw(&mut self.components, state, ctx2, &mut ui)?;
+
+        let draw_data = ui.render();
+        render_imgui(ctx2, draw_data)?;
+
+        Ok(())
+    }
+}

src/framework/vfs.rs

@@ -0,0 +1,678 @@
+//! A virtual file system layer that lets us define multiple
+//! "file systems" with various backing stores, then merge them
+//! together.
+//!
+//! Basically a re-implementation of the C library `PhysFS`.  The
+//! `vfs` crate does something similar but has a couple design
+//! decisions that make it kind of incompatible with this use case:
+//! the relevant trait for it has generic methods so we can't use it
+//! as a trait object, and its path abstraction is not the most
+//! convenient.
+
+
+use std::collections::VecDeque;
+use std::fmt::{self, Debug};
+use std::fs;
+use std::io::{Read, Seek, Write, BufRead};
+use std::path::{self, Path, PathBuf};
+use crate::framework::error::{GameResult, GameError};
+
+fn convenient_path_to_str(path: &path::Path) -> GameResult<&str> {
+    path.to_str().ok_or_else(|| {
+        let errmessage = format!("Invalid path format for resource: {:?}", path);
+        GameError::FilesystemError(errmessage)
+    })
+}
+
+/// Virtual file
+pub trait VFile: Read + Write + Seek + Debug {}
+
+impl<T> VFile for T where T: Read + Write + Seek + Debug {}
+
+/// Options for opening files
+///
+/// We need our own version of this structure because the one in
+/// `std` annoyingly doesn't let you read the read/write/create/etc
+/// state out of it.
+#[must_use]
+#[allow(missing_docs)]
+#[derive(Debug, Default, Copy, Clone, PartialEq)]
+pub struct OpenOptions {
+    pub read: bool,
+    pub write: bool,
+    pub create: bool,
+    pub append: bool,
+    pub truncate: bool,
+}
+
+impl OpenOptions {
+    /// Create a new instance
+    pub fn new() -> OpenOptions {
+        Default::default()
+    }
+
+    /// Open for reading
+    pub fn read(mut self, read: bool) -> OpenOptions {
+        self.read = read;
+        self
+    }
+
+    /// Open for writing
+    pub fn write(mut self, write: bool) -> OpenOptions {
+        self.write = write;
+        self
+    }
+
+    /// Create the file if it does not exist yet
+    pub fn create(mut self, create: bool) -> OpenOptions {
+        self.create = create;
+        self
+    }
+
+    /// Append at the end of the file
+    pub fn append(mut self, append: bool) -> OpenOptions {
+        self.append = append;
+        self
+    }
+
+    /// Truncate the file to 0 bytes after opening
+    pub fn truncate(mut self, truncate: bool) -> OpenOptions {
+        self.truncate = truncate;
+        self
+    }
+
+    fn to_fs_openoptions(self) -> fs::OpenOptions {
+        let mut opt = fs::OpenOptions::new();
+        let _ = opt
+            .read(self.read)
+            .write(self.write)
+            .create(self.create)
+            .append(self.append)
+            .truncate(self.truncate)
+            .create(self.create);
+        opt
+    }
+}
+
+/// Virtual filesystem
+pub trait VFS: Debug {
+    /// Open the file at this path with the given options
+    fn open_options(&self, path: &Path, open_options: OpenOptions) -> GameResult<Box<dyn VFile>>;
+    /// Open the file at this path for reading
+    fn open(&self, path: &Path) -> GameResult<Box<dyn VFile>> {
+        self.open_options(path, OpenOptions::new().read(true))
+    }
+    /// Open the file at this path for writing, truncating it if it exists already
+    fn create(&self, path: &Path) -> GameResult<Box<dyn VFile>> {
+        self.open_options(
+            path,
+            OpenOptions::new().write(true).create(true).truncate(true),
+        )
+    }
+    /// Open the file at this path for appending, creating it if necessary
+    fn append(&self, path: &Path) -> GameResult<Box<dyn VFile>> {
+        self.open_options(
+            path,
+            OpenOptions::new().write(true).create(true).append(true),
+        )
+    }
+    /// Create a directory at the location by this path
+    fn mkdir(&self, path: &Path) -> GameResult;
+
+    /// Remove a file or an empty directory.
+    fn rm(&self, path: &Path) -> GameResult;
+
+    /// Remove a file or directory and all its contents
+    fn rmrf(&self, path: &Path) -> GameResult;
+
+    /// Check if the file exists
+    fn exists(&self, path: &Path) -> bool;
+
+    /// Get the file's metadata
+    fn metadata(&self, path: &Path) -> GameResult<Box<dyn VMetadata>>;
+
+    /// Retrieve all file and directory entries in the given directory.
+    fn read_dir(&self, path: &Path) -> GameResult<Box<dyn Iterator<Item=GameResult<PathBuf>>>>;
+
+    /// Retrieve the actual location of the VFS root, if available.
+    fn to_path_buf(&self) -> Option<PathBuf>;
+}
+
+/// VFS metadata
+pub trait VMetadata {
+    /// Returns whether or not it is a directory.
+    /// Note that zip files don't actually have directories, awkwardly,
+    /// just files with very long names.
+    fn is_dir(&self) -> bool;
+    /// Returns whether or not it is a file.
+    fn is_file(&self) -> bool;
+    /// Returns the length of the thing.  If it is a directory,
+    /// the result of this is undefined/platform dependent.
+    fn len(&self) -> u64;
+}
+
+/// A VFS that points to a directory and uses it as the root of its
+/// file hierarchy.
+///
+/// It IS allowed to have symlinks in it!  They're surprisingly
+/// difficult to get rid of.
+#[derive(Clone)]
+pub struct PhysicalFS {
+    root: PathBuf,
+    readonly: bool,
+}
+
+#[derive(Debug, Clone)]
+/// Physical FS metadata
+pub struct PhysicalMetadata(fs::Metadata);
+
+impl VMetadata for PhysicalMetadata {
+    fn is_dir(&self) -> bool {
+        self.0.is_dir()
+    }
+    fn is_file(&self) -> bool {
+        self.0.is_file()
+    }
+    fn len(&self) -> u64 {
+        self.0.len()
+    }
+}
+
+/// This takes an absolute path and returns either a sanitized relative
+/// version of it, or None if there's something bad in it.
+///
+/// What we want is an absolute path with no `..`'s in it, so, something
+/// like "/foo" or "/foo/bar.txt".  This means a path with components
+/// starting with a `RootDir`, and zero or more `Normal` components.
+///
+/// We gotta return a new path because there's apparently no real good way
+/// to turn an absolute path into a relative path with the same
+/// components (other than the first), and pushing an absolute `Path`
+/// onto a `PathBuf` just completely nukes its existing contents.
+fn sanitize_path(path: &path::Path) -> Option<PathBuf> {
+    let mut c = path.components();
+    match c.next() {
+        Some(path::Component::RootDir) => (),
+        _ => return None,
+    }
+
+    fn is_normal_component(comp: path::Component) -> Option<&str> {
+        match comp {
+            path::Component::Normal(s) => s.to_str(),
+            _ => None,
+        }
+    }
+
+    // This could be done more cleverly but meh
+    let mut accm = PathBuf::new();
+    for component in c {
+        if let Some(s) = is_normal_component(component) {
+            accm.push(s)
+        } else {
+            return None;
+        }
+    }
+    Some(accm)
+}
+
+impl PhysicalFS {
+    /// Creates a new PhysicalFS
+    pub fn new(root: &Path, readonly: bool) -> Self {
+        PhysicalFS {
+            root: root.into(),
+            readonly,
+        }
+    }
+
+    /// Takes a given path (&str) and returns
+    /// a new PathBuf containing the canonical
+    /// absolute path you get when appending it
+    /// to this filesystem's root.
+    fn to_absolute(&self, p: &Path) -> GameResult<PathBuf> {
+        if let Some(safe_path) = sanitize_path(p) {
+            let mut root_path = self.root.clone();
+            root_path.push(safe_path);
+            Ok(root_path)
+        } else {
+            let msg = format!(
+                "Path {:?} is not valid: must be an absolute path with no \
+                 references to parent directories",
+                p
+            );
+            Err(GameError::FilesystemError(msg))
+        }
+    }
+
+    /// Creates the PhysicalFS's root directory if necessary.
+    /// Idempotent.
+    /// This way we can not create the directory until it's
+    /// actually used, though it IS a tiny bit of a performance
+    /// malus.
+    fn create_root(&self) -> GameResult {
+        if !self.root.exists() {
+            fs::create_dir_all(&self.root).map_err(GameError::from)
+        } else {
+            Ok(())
+        }
+    }
+}
+
+impl Debug for PhysicalFS {
+    fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
+        write!(f, "<PhysicalFS root: {}>", self.root.display())
+    }
+}
+
+impl VFS for PhysicalFS {
+    /// Open the file at this path with the given options
+    fn open_options(&self, path: &Path, open_options: OpenOptions) -> GameResult<Box<dyn VFile>> {
+        if self.readonly
+            && (open_options.write
+            || open_options.create
+            || open_options.append
+            || open_options.truncate)
+        {
+            let msg = format!(
+                "Cannot alter file {:?} in root {:?}, filesystem read-only",
+                path, self
+            );
+            return Err(GameError::FilesystemError(msg));
+        }
+        self.create_root()?;
+        let p = self.to_absolute(path)?;
+        open_options
+            .to_fs_openoptions()
+            .open(p)
+            .map(|x| Box::new(x) as Box<dyn VFile>)
+            .map_err(GameError::from)
+    }
+
+    /// Create a directory at the location by this path
+    fn mkdir(&self, path: &Path) -> GameResult {
+        if self.readonly {
+            return Err(GameError::FilesystemError(
+                "Tried to make directory {} but FS is \
+                 read-only"
+                    .to_string(),
+            ));
+        }
+        self.create_root()?;
+        let p = self.to_absolute(path)?;
+        //println!("Creating {:?}", p);
+        fs::DirBuilder::new()
+            .recursive(true)
+            .create(p)
+            .map_err(GameError::from)
+    }
+
+    /// Remove a file
+    fn rm(&self, path: &Path) -> GameResult {
+        if self.readonly {
+            return Err(GameError::FilesystemError(
+                "Tried to remove file {} but FS is read-only".to_string(),
+            ));
+        }
+
+        self.create_root()?;
+        let p = self.to_absolute(path)?;
+        if p.is_dir() {
+            fs::remove_dir(p).map_err(GameError::from)
+        } else {
+            fs::remove_file(p).map_err(GameError::from)
+        }
+    }
+
+    /// Remove a file or directory and all its contents
+    fn rmrf(&self, path: &Path) -> GameResult {
+        if self.readonly {
+            return Err(GameError::FilesystemError(
+                "Tried to remove file/dir {} but FS is \
+                 read-only"
+                    .to_string(),
+            ));
+        }
+
+        self.create_root()?;
+        let p = self.to_absolute(path)?;
+        if p.is_dir() {
+            fs::remove_dir_all(p).map_err(GameError::from)
+        } else {
+            fs::remove_file(p).map_err(GameError::from)
+        }
+    }
+
+    /// Check if the file exists
+    fn exists(&self, path: &Path) -> bool {
+        match self.to_absolute(path) {
+            Ok(p) => p.exists(),
+            _ => false,
+        }
+    }
+
+    /// Get the file's metadata
+    fn metadata(&self, path: &Path) -> GameResult<Box<dyn VMetadata>> {
+        self.create_root()?;
+        let p = self.to_absolute(path)?;
+        p.metadata()
+            .map(|m| Box::new(PhysicalMetadata(m)) as Box<dyn VMetadata>)
+            .map_err(GameError::from)
+    }
+
+    /// Retrieve the path entries in this path
+    fn read_dir(&self, path: &Path) -> GameResult<Box<dyn Iterator<Item=GameResult<PathBuf>>>> {
+        self.create_root()?;
+        let p = self.to_absolute(path)?;
+        // This is inconvenient because path() returns the full absolute
+        // path of the bloody file, which is NOT what we want!
+        // But if we use file_name() to just get the name then it is ALSO not what we want!
+        // what we WANT is the full absolute file path, *relative to the resources dir*.
+        // So that we can do read_dir("/foobar/"), and for each file, open it and query
+        // it and such by name.
+        // So we build the paths ourself.
+        let direntry_to_path = |entry: &fs::DirEntry| -> GameResult<PathBuf> {
+            let fname = entry
+                .file_name()
+                .into_string()
+                .expect("Non-unicode char in file path?  Should never happen, I hope!");
+            let mut pathbuf = PathBuf::from(path);
+            pathbuf.push(fname);
+            Ok(pathbuf)
+        };
+        let itr = fs::read_dir(p)?
+            .map(|entry| direntry_to_path(&entry?))
+            .collect::<Vec<_>>()
+            .into_iter();
+        Ok(Box::new(itr))
+    }
+
+    /// Retrieve the actual location of the VFS root, if available.
+    fn to_path_buf(&self) -> Option<PathBuf> {
+        Some(self.root.clone())
+    }
+}
+
+/// A structure that joins several VFS's together in order.
+#[derive(Debug)]
+pub struct OverlayFS {
+    roots: VecDeque<Box<dyn VFS>>,
+}
+
+impl OverlayFS {
+    /// Creates a new OverlayFS
+    pub fn new() -> Self {
+        Self {
+            roots: VecDeque::new(),
+        }
+    }
+
+    /// Adds a new VFS to the front of the list.
+    /// Currently unused, I suppose, but good to
+    /// have at least for tests.
+    #[allow(dead_code)]
+    pub fn push_front(&mut self, fs: Box<dyn VFS>) {
+        self.roots.push_front(fs);
+    }
+
+    /// Adds a new VFS to the end of the list.
+    pub fn push_back(&mut self, fs: Box<dyn VFS>) {
+        self.roots.push_back(fs);
+    }
+
+    /// Returns a list of registered VFS roots.
+    pub fn roots(&self) -> &VecDeque<Box<dyn VFS>> {
+        &self.roots
+    }
+}
+
+impl VFS for OverlayFS {
+    /// Open the file at this path with the given options
+    fn open_options(&self, path: &Path, open_options: OpenOptions) -> GameResult<Box<dyn VFile>> {
+        let mut tried: Vec<(PathBuf, GameError)> = vec![];
+
+        for vfs in &self.roots {
+            match vfs.open_options(path, open_options) {
+                Err(e) => {
+                    if let Some(vfs_path) = vfs.to_path_buf() {
+                        tried.push((vfs_path, e));
+                    } else {
+                        tried.push((PathBuf::from("<invalid path>"), e));
+                    }
+                }
+                f => return f,
+            }
+        }
+        let errmessage = String::from(convenient_path_to_str(path)?);
+        Err(GameError::ResourceNotFound(errmessage, tried))
+    }
+
+    /// Create a directory at the location by this path
+    fn mkdir(&self, path: &Path) -> GameResult {
+        for vfs in &self.roots {
+            match vfs.mkdir(path) {
+                Err(_) => (),
+                f => return f,
+            }
+        }
+        Err(GameError::FilesystemError(format!(
+            "Could not find anywhere writeable to make dir {:?}",
+            path
+        )))
+    }
+
+    /// Remove a file
+    fn rm(&self, path: &Path) -> GameResult {
+        for vfs in &self.roots {
+            match vfs.rm(path) {
+                Err(_) => (),
+                f => return f,
+            }
+        }
+        Err(GameError::FilesystemError(format!(
+            "Could not remove file {:?}",
+            path
+        )))
+    }
+
+    /// Remove a file or directory and all its contents
+    fn rmrf(&self, path: &Path) -> GameResult {
+        for vfs in &self.roots {
+            match vfs.rmrf(path) {
+                Err(_) => (),
+                f => return f,
+            }
+        }
+        Err(GameError::FilesystemError(format!(
+            "Could not remove file/dir {:?}",
+            path
+        )))
+    }
+
+    /// Check if the file exists
+    fn exists(&self, path: &Path) -> bool {
+        for vfs in &self.roots {
+            if vfs.exists(path) {
+                return true;
+            }
+        }
+
+        false
+    }
+
+    /// Get the file's metadata
+    fn metadata(&self, path: &Path) -> GameResult<Box<dyn VMetadata>> {
+        for vfs in &self.roots {
+            match vfs.metadata(path) {
+                Err(_) => (),
+                f => return f,
+            }
+        }
+        Err(GameError::FilesystemError(format!(
+            "Could not get metadata for file/dir {:?}",
+            path
+        )))
+    }
+
+    /// Retrieve the path entries in this path
+    fn read_dir(&self, path: &Path) -> GameResult<Box<dyn Iterator<Item=GameResult<PathBuf>>>> {
+        // This is tricky 'cause we have to actually merge iterators together...
+        // Doing it the simple and stupid way works though.
+        let mut v = Vec::new();
+        for fs in &self.roots {
+            if let Ok(rddir) = fs.read_dir(path) {
+                v.extend(rddir)
+            }
+        }
+        Ok(Box::new(v.into_iter()))
+    }
+
+    /// Retrieve the actual location of the VFS root, if available.
+    fn to_path_buf(&self) -> Option<PathBuf> {
+        None
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use std::io::{self, BufRead};
+
+    use super::*;
+
+    #[test]
+    fn headless_test_path_filtering() {
+        // Valid pahts
+        let p = path::Path::new("/foo");
+        assert!(sanitize_path(p).is_some());
+
+        let p = path::Path::new("/foo/");
+        assert!(sanitize_path(p).is_some());
+
+        let p = path::Path::new("/foo/bar.txt");
+        assert!(sanitize_path(p).is_some());
+
+        let p = path::Path::new("/");
+        assert!(sanitize_path(p).is_some());
+
+        // Invalid paths
+        let p = path::Path::new("../foo");
+        assert!(sanitize_path(p).is_none());
+
+        let p = path::Path::new("foo");
+        assert!(sanitize_path(p).is_none());
+
+        let p = path::Path::new("/foo/../../");
+        assert!(sanitize_path(p).is_none());
+
+        let p = path::Path::new("/foo/../bop");
+        assert!(sanitize_path(p).is_none());
+
+        let p = path::Path::new("/../bar");
+        assert!(sanitize_path(p).is_none());
+
+        let p = path::Path::new("");
+        assert!(sanitize_path(p).is_none());
+    }
+
+    #[test]
+    fn headless_test_read() {
+        let cargo_path = Path::new(env!("CARGO_MANIFEST_DIR"));
+        let fs = PhysicalFS::new(cargo_path, true);
+        let f = fs.open(Path::new("/Cargo.toml")).unwrap();
+        let mut bf = io::BufReader::new(f);
+        let mut s = String::new();
+        let _ = bf.read_line(&mut s).unwrap();
+        // Trim whitespace from string 'cause it will
+        // potentially be different on Windows and Unix.
+        let trimmed_string = s.trim();
+        assert_eq!(trimmed_string, "[package]");
+    }
+
+    #[test]
+    fn headless_test_read_overlay() {
+        let cargo_path = Path::new(env!("CARGO_MANIFEST_DIR"));
+        let fs1 = PhysicalFS::new(cargo_path, true);
+        let mut f2path = PathBuf::from(cargo_path);
+        f2path.push("src");
+        let fs2 = PhysicalFS::new(&f2path, true);
+        let mut ofs = OverlayFS::new();
+        ofs.push_back(Box::new(fs1));
+        ofs.push_back(Box::new(fs2));
+
+        assert!(ofs.exists(Path::new("/Cargo.toml")));
+        assert!(ofs.exists(Path::new("/lib.rs")));
+        assert!(!ofs.exists(Path::new("/foobaz.rs")));
+    }
+
+    #[test]
+    fn headless_test_physical_all() {
+        let cargo_path = Path::new(env!("CARGO_MANIFEST_DIR"));
+        let fs = PhysicalFS::new(cargo_path, false);
+        let testdir = Path::new("/testdir");
+        let f1 = Path::new("/testdir/file1.txt");
+
+        // Delete testdir if it is still lying around
+        if fs.exists(testdir) {
+            fs.rmrf(testdir).unwrap();
+        }
+        assert!(!fs.exists(testdir));
+
+        // Create and delete test dir
+        fs.mkdir(testdir).unwrap();
+        assert!(fs.exists(testdir));
+        fs.rm(testdir).unwrap();
+        assert!(!fs.exists(testdir));
+
+        let test_string = "Foo!";
+        fs.mkdir(testdir).unwrap();
+        {
+            let mut f = fs.append(f1).unwrap();
+            let _ = f.write(test_string.as_bytes()).unwrap();
+        }
+        {
+            let mut buf = Vec::new();
+            let mut f = fs.open(f1).unwrap();
+            let _ = f.read_to_end(&mut buf).unwrap();
+            assert_eq!(&buf[..], test_string.as_bytes());
+        }
+
+        {
+            // Test metadata()
+            let m = fs.metadata(f1).unwrap();
+            assert!(m.is_file());
+            assert!(!m.is_dir());
+            assert_eq!(m.len(), 4);
+
+            let m = fs.metadata(testdir).unwrap();
+            assert!(!m.is_file());
+            assert!(m.is_dir());
+            // Not exactly sure what the "length" of a directory is, buuuuuut...
+            // It appears to vary based on the platform in fact.
+            // On my desktop, it's 18.
+            // On Travis's VM, it's 4096.
+            // On Appveyor's VM, it's 0.
+            // So, it's meaningless.
+            //assert_eq!(m.len(), 18);
+        }
+
+        {
+            // Test read_dir()
+            let r = fs.read_dir(testdir).unwrap();
+            assert_eq!(r.count(), 1);
+            let r = fs.read_dir(testdir).unwrap();
+            for f in r {
+                let fname = f.unwrap();
+                assert!(fs.exists(&fname));
+            }
+        }
+
+        {
+            assert!(fs.exists(f1));
+            fs.rm(f1).unwrap();
+            assert!(!fs.exists(f1));
+        }
+
+        fs.rmrf(testdir).unwrap();
+        assert!(!fs.exists(testdir));
+    }
+
+    // BUGGO: TODO: Make sure all functions are tested for OverlayFS and ZipFS!!
+}

src/input/combined_menu_controller.rs

@@ -1,6 +1,7 @@
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 use crate::input::player_controller::PlayerController;
 use crate::shared_game_state::SharedGameState;
-use ggez::{GameResult, Context};
 
 pub struct CombinedMenuController {
     controllers: Vec<Box<dyn PlayerController>>,

src/input/dummy_player_controller.rs

@@ -1,5 +1,5 @@
-use ggez::{Context, GameResult};
-
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 use crate::input::player_controller::PlayerController;
 use crate::shared_game_state::SharedGameState;
 

src/input/keyboard_player_controller.rs

@@ -1,11 +1,11 @@
-use ggez::{Context, GameResult};
-use ggez::input::keyboard;
-use winit::event::VirtualKeyCode;
-
 use crate::bitfield;
 use crate::input::player_controller::PlayerController;
 use crate::player::TargetPlayer;
 use crate::shared_game_state::SharedGameState;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
+use crate::framework::keyboard;
+use crate::framework::keyboard::ScanCode;
 
 bitfield! {
   #[derive(Clone, Copy)]
@@ -64,8 +64,8 @@ impl PlayerController for KeyboardController {
         self.state.set_skip(keyboard::is_key_pressed(ctx, keymap.skip));
         self.state.set_prev_weapon(keyboard::is_key_pressed(ctx, keymap.prev_weapon));
         self.state.set_next_weapon(keyboard::is_key_pressed(ctx, keymap.next_weapon));
-        self.state.set_enter(keyboard::is_key_pressed(ctx, VirtualKeyCode::Return));
-        self.state.set_escape(keyboard::is_key_pressed(ctx, VirtualKeyCode::Escape));
+        self.state.set_enter(keyboard::is_key_pressed(ctx, ScanCode::Return));
+        self.state.set_escape(keyboard::is_key_pressed(ctx, ScanCode::Escape));
 
         Ok(())
     }

src/input/player_controller.rs

@@ -1,4 +1,5 @@
-use ggez::{Context, GameResult};
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 
 use crate::shared_game_state::SharedGameState;
 

src/input/touch_controls.rs

@@ -1,5 +1,5 @@
-use ggez::{Context, GameResult};
-use winit::event::TouchPhase;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 
 use crate::common::Rect;
 use crate::engine_constants::EngineConstants;
@@ -39,6 +39,7 @@ impl TouchControls {
         }
     }
 
+    /*
     pub fn process_winit_event(&mut self, scale: f32, touch: winit::event::Touch) {
         match touch.phase {
             TouchPhase::Started | TouchPhase::Moved => {
@@ -66,7 +67,7 @@ impl TouchControls {
                 self.clicks.retain(|p| p.id != touch.id);
             }
         }
-    }
+    }*/
 
     pub fn point_in(&self, bounds: Rect) -> Option<u64> {
         for point in self.points.iter() {

src/input/touch_player_controller.rs

@@ -1,4 +1,6 @@
-use ggez::{Context, GameResult};
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
+
 
 use crate::bitfield;
 use crate::common::Rect;

src/lib.rs

@@ -7,32 +7,29 @@ extern crate strum;
 #[macro_use]
 extern crate strum_macros;
 
-use std::{env, mem};
+use core::mem;
 use std::cell::UnsafeCell;
-use std::path;
+use std::env;
+use std::path::PathBuf;
 use std::time::Instant;
 
-use ggez::{Context, ContextBuilder, GameError, GameResult};
-use ggez::conf::{Backend, WindowMode, WindowSetup};
-use ggez::event::{KeyCode, KeyMods};
-use ggez::filesystem::mount_vfs;
-use ggez::graphics;
-use ggez::graphics::{Canvas, DrawParam, window};
-use ggez::graphics::glutin_ext::WindowUpdateExt;
-use ggez::input::keyboard;
-use ggez::mint::ColumnMatrix4;
-use ggez::nalgebra::Vector2;
+use directories::ProjectDirs;
 use log::*;
 use pretty_env_logger::env_logger::Env;
-use winit::event::{ElementState, Event, KeyboardInput, WindowEvent};
-use winit::event_loop::ControlFlow;
 
 use crate::builtin_fs::BuiltinFS;
+use crate::framework::backend::init_backend;
+use crate::framework::context::Context;
+use crate::framework::error::{GameError, GameResult};
+use crate::framework::filesystem::{mount_user_vfs, mount_vfs};
+use crate::framework::graphics;
+use crate::framework::keyboard::ScanCode;
+use crate::framework::ui::UI;
+use crate::framework::vfs::PhysicalFS;
 use crate::scene::loading_scene::LoadingScene;
 use crate::scene::Scene;
 use crate::shared_game_state::{SharedGameState, TimingMode};
-use crate::texture_set::G_MAG;
-use crate::ui::UI;
+use crate::texture_set::{G_MAG, I_MAG};
 
 mod bmfont;
 mod bmfont_renderer;
@@ -46,6 +43,7 @@ mod encoding;
 mod engine_constants;
 mod entity;
 mod frame;
+mod framework;
 mod inventory;
 mod input;
 mod live_debugger;
@@ -61,20 +59,19 @@ mod scene;
 #[cfg(feature = "scripting")]
 mod scripting;
 mod settings;
+#[cfg(feature = "backend-gfx")]
 mod shaders;
 mod shared_game_state;
 mod stage;
 mod sound;
 mod text_script;
 mod texture_set;
-mod ui;
 mod weapon;
 
-struct Game {
+pub struct Game {
     scene: Option<Box<dyn Scene>>,
     state: UnsafeCell<SharedGameState>,
     ui: UI,
-    def_matrix: ColumnMatrix4<f32>,
     start_time: Instant,
     last_tick: u128,
     next_tick: u128,
@@ -86,7 +83,6 @@ impl Game {
         let s = Game {
             scene: None,
             ui: UI::new(ctx)?,
-            def_matrix: DrawParam::new().to_matrix(),
             state: UnsafeCell::new(SharedGameState::new(ctx)?),
             start_time: Instant::now(),
             last_tick: 0,
@@ -157,14 +153,16 @@ impl Game {
                 n1 / n2
             } else { 1.0 };
         }
-        unsafe { G_MAG = if state_ref.settings.subpixel_coords { state_ref.scale } else { 1.0 } };
+        unsafe {
+            G_MAG = if state_ref.settings.subpixel_coords { state_ref.scale } else { 1.0 };
+            I_MAG = state_ref.scale;
+        }
         self.loops = 0;
 
         graphics::clear(ctx, [0.0, 0.0, 0.0, 1.0].into());
-        graphics::set_transform(ctx, DrawParam::new()
-            .scale(Vector2::new(state_ref.scale, state_ref.scale))
-            .to_matrix());
-        graphics::apply_transformations(ctx)?;
+        /*graphics::set_projection(ctx, DrawParam::new()
+            .scale(Vec2::new(state_ref.scale, state_ref.scale))
+            .to_matrix());*/
 
         if let Some(scene) = self.scene.as_mut() {
             scene.draw(state_ref, ctx)?;
@@ -172,43 +170,13 @@ impl Game {
                 state_ref.touch_controls.draw(state_ref.canvas_size, &state_ref.constants, &mut state_ref.texture_set, ctx)?;
             }
 
-            graphics::set_transform(ctx, self.def_matrix);
-            graphics::apply_transformations(ctx)?;
+            //graphics::set_projection(ctx, self.def_matrix);
             self.ui.draw(state_ref, ctx, scene)?;
         }
 
         graphics::present(ctx)?;
         Ok(())
     }
-
-    fn key_down_event(&mut self, key_code: KeyCode, _key_mod: KeyMods, repeat: bool) {
-        if repeat { return; }
-
-        let state = unsafe { &mut *self.state.get() };
-        match key_code {
-            KeyCode::F5 => { state.settings.subpixel_coords = !state.settings.subpixel_coords }
-            KeyCode::F6 => { state.settings.motion_interpolation = !state.settings.motion_interpolation }
-            KeyCode::F7 => { state.set_speed(1.0) }
-            KeyCode::F8 => {
-                if state.settings.speed > 0.2 {
-                    state.set_speed(state.settings.speed - 0.1);
-                }
-            }
-            KeyCode::F9 => {
-                if state.settings.speed < 3.0 {
-                    state.set_speed(state.settings.speed + 0.1);
-                }
-            }
-            KeyCode::F10 => { state.settings.debug_outlines = !state.settings.debug_outlines }
-            KeyCode::F11 => { state.settings.god_mode = !state.settings.god_mode }
-            KeyCode::F12 => { state.settings.infinite_booster = !state.settings.infinite_booster }
-            _ => {}
-        }
-    }
-
-    fn key_up_event(&mut self, _key_code: KeyCode, _key_mod: KeyMods) {
-        //
-    }
 }
 
 #[cfg(target_os = "android")]
@@ -271,68 +239,39 @@ pub fn android_main() {
     init().unwrap();
 }
 
-#[cfg(target_os = "android")]
-static BACKENDS: [Backend; 2] = [
-    Backend::OpenGLES { major: 3, minor: 0 },
-    Backend::OpenGLES { major: 2, minor: 0 }
-];
-
-#[cfg(not(target_os = "android"))]
-static BACKENDS: [Backend; 4] = [
-    Backend::OpenGL { major: 3, minor: 2 },
-    Backend::OpenGLES { major: 3, minor: 2 },
-    Backend::OpenGLES { major: 3, minor: 0 },
-    Backend::OpenGLES { major: 2, minor: 0 }
-];
-
-fn init_ctx<P: Into<path::PathBuf> + Clone>(event_loop: &winit::event_loop::EventLoopWindowTarget<()>, resource_dir: P) -> GameResult<Context> {
-    for backend in BACKENDS.iter() {
-        let ctx = ContextBuilder::new("doukutsu-rs")
-            .window_setup(WindowSetup::default().title("Cave Story ~ Doukutsu Monogatari (doukutsu-rs)"))
-            .window_mode(WindowMode::default()
-                .resizable(true)
-                .min_dimensions(320.0, 240.0)
-                .dimensions(640.0, 480.0))
-            .add_resource_path(resource_dir.clone())
-            .backend(*backend)
-            .build(event_loop);
-
-        match ctx {
-            Ok(mut ctx) => {
-                mount_vfs(&mut ctx, Box::new(BuiltinFS::new()));
-
-                return Ok(ctx);
-            }
-            Err(err) => {
-                log::warn!("Failed to create backend using config {:?}: {}", backend, err);
-            }
-        }
-    }
-
-    Err(GameError::EventLoopError("Failed to initialize OpenGL backend. Perhaps the driver is outdated?".to_string()))
-}
-
 pub fn init() -> GameResult {
     pretty_env_logger::env_logger::from_env(Env::default().default_filter_or("info"))
-        .filter(Some("gfx_device_gl::factory"), LevelFilter::Warn)
         .init();
 
     let resource_dir = if let Ok(data_dir) = env::var("CAVESTORY_DATA_DIR") {
-        path::PathBuf::from(data_dir)
-    } else if let Ok(manifest_dir) = env::var("CARGO_MANIFEST_DIR") {
-        let mut path = path::PathBuf::from(manifest_dir);
-        path.push("data");
-        path
+        PathBuf::from(data_dir)
     } else {
-        path::PathBuf::from("data")
+        let mut resource_dir = env::current_exe()?;
+        if resource_dir.file_name().is_some() {
+            let _ = resource_dir.pop();
+        }
+        resource_dir.push("data");
+        resource_dir
     };
 
     info!("Resource directory: {:?}", resource_dir);
     info!("Initializing engine...");
 
-    let event_loop = winit::event_loop::EventLoop::new();
-    let mut context: Option<Context>;
-    let mut game: Option<Game> = None;
+    let mut context = Context::new();
+    mount_vfs(&mut context, Box::new(BuiltinFS::new()));
+    mount_vfs(&mut context, Box::new(PhysicalFS::new(&resource_dir, true)));
+
+
+    #[cfg(not(target_os = "android"))]
+        let project_dirs = match ProjectDirs::from("", "", "doukutsu-rs") {
+        Some(dirs) => dirs,
+        None => {
+            return Err(GameError::FilesystemError(String::from(
+                "No valid home directory path could be retrieved.",
+            )));
+        }
+    };
+    mount_user_vfs(&mut context, Box::new(PhysicalFS::new(project_dirs.data_local_dir(), false)));
 
     #[cfg(target_os = "android")]
         {
@@ -347,151 +286,17 @@ pub fn init() -> GameResult {
             }
         }
 
-    context = Some(init_ctx(&event_loop, resource_dir.clone())?);
-
-    event_loop.run(move |event, target, flow| {
-        #[cfg(target_os = "windows")]
-            {
-                // Windows' system clock implementation isn't monotonic when the process gets switched to another core.
-                // Rust has mitigations for this, but apparently aren't very effective unless Instant is called very often.
-                let _ = Instant::now();
-            }
-        if let Some(ctx) = &mut context {
-            ctx.process_event(&event);
-
-            if let Some(game) = &mut game {
-                game.ui.handle_events(ctx, &event);
-            } else {
-                let mut new_game = Game::new(ctx).unwrap();
-                let state_ref = unsafe { &mut *new_game.state.get() };
-                state_ref.next_scene = Some(Box::new(LoadingScene::new()));
-                game = Some(new_game);
-
-                #[cfg(feature = "scripting")]
-                    {
-                        unsafe {
-                            let game_ref = game.as_mut().unwrap();
-                            let state_ref = game_ref.state.get();
-
-                            (&mut *state_ref).lua.update_refs(game_ref.state.get(), ctx as *mut Context);
-                        }
-                    }
+    let mut game = Game::new(&mut context)?;
+    let state_ref = unsafe { &mut *game.state.get() };
+    #[cfg(feature = "scripting")]
+        {
+            unsafe {
+                state_ref.lua.update_refs(game.state.get(), &mut context as *mut Context);
             }
         }
 
-        match event {
-            Event::Resumed => {
-                #[cfg(target_os = "android")]
-                if context.is_none() {
-                    context = Some(init_ctx(target, resource_dir.clone()).unwrap());
-                }
-                let _ = target;
+    state_ref.next_scene = Some(Box::new(LoadingScene::new()));
+    context.run(&mut game)?;
 
-                if let Some(game) = &mut game {
-                    game.loops = 0;
-                }
-            }
-            Event::Suspended => {
-                #[cfg(target_os = "android")]
-                    {
-                        context = None;
-                    }
-                if let Some(game) = &mut game {
-                    game.loops = 0;
-                }
-            }
-            Event::WindowEvent { event, .. } => {
-                match event {
-                    WindowEvent::CloseRequested => {
-                        if let Some(game) = &mut game {
-                            let state_ref = unsafe { &mut *game.state.get() };
-                            state_ref.shutdown();
-                        }
-                        *flow = ControlFlow::Exit;
-                    }
-                    WindowEvent::Resized(size) => {
-                        // Minimizing a window on Windows causes this event to get called with a 0x0 size
-                        if size.width != 0 && size.height != 0 {
-                            if let (Some(ctx), Some(game)) = (&mut context, &mut game) {
-                                let state_ref = unsafe { &mut *game.state.get() };
-
-                                state_ref.tmp_canvas = Canvas::with_window_size(ctx).unwrap();
-                                state_ref.game_canvas = Canvas::with_window_size(ctx).unwrap();
-                                state_ref.lightmap_canvas = Canvas::with_window_size(ctx).unwrap();
-                                state_ref.handle_resize(ctx).unwrap();
-                                graphics::window(ctx).update_gfx(&mut game.ui.main_color, &mut game.ui.main_depth);
-                            }
-                        }
-                    }
-                    WindowEvent::Touch(touch) => {
-                        if let Some(game) = &mut game {
-                            let state_ref = unsafe { &mut *game.state.get() };
-                            state_ref.touch_controls.process_winit_event(state_ref.scale, touch);
-                        }
-                    }
-                    WindowEvent::KeyboardInput {
-                        input:
-                        KeyboardInput {
-                            state: el_state,
-                            virtual_keycode: Some(keycode),
-                            modifiers,
-                            ..
-                        },
-                        ..
-                    } => {
-                        if let (Some(ctx), Some(game)) = (&mut context, &mut game) {
-                            match el_state {
-                                ElementState::Pressed => {
-                                    let repeat = keyboard::is_key_repeated(ctx);
-                                    game.key_down_event(keycode, modifiers.into(), repeat);
-                                }
-                                ElementState::Released => {
-                                    game.key_up_event(keycode, modifiers.into());
-                                }
-                            }
-                        }
-                    }
-                    _ => {}
-                }
-            }
-            Event::RedrawRequested(win) => {
-                if let (Some(ctx), Some(game)) = (&mut context, &mut game) {
-                    if win == window(ctx).window().id() {
-                        ctx.timer_context.tick();
-                        game.draw(ctx).unwrap();
-                    }
-                }
-            }
-            Event::MainEventsCleared => {
-                if let (Some(ctx), Some(game)) = (&mut context, &mut game) {
-                    game.update(ctx).unwrap();
-
-                    #[cfg(target_os = "android")]
-                        {
-                            ctx.timer_context.tick();
-                            game.draw(ctx).unwrap(); // redraw request is unimplemented on shitdroid
-                        }
-                    window(ctx).window().request_redraw();
-
-                    let state_ref = unsafe { &mut *game.state.get() };
-
-                    if state_ref.shutdown {
-                        log::info!("Shutting down...");
-                        *flow = ControlFlow::Exit;
-                        return;
-                    }
-
-                    if state_ref.next_scene.is_some() {
-                        mem::swap(&mut game.scene, &mut state_ref.next_scene);
-                        state_ref.next_scene = None;
-
-                        game.scene.as_mut().unwrap().init(state_ref, ctx).unwrap();
-                        game.loops = 0;
-                        state_ref.frame_time = 0.0;
-                    }
-                }
-            }
-            _ => {}
-        }
-    })
+    Ok(())
 }

src/live_debugger.rs

@@ -1,4 +1,6 @@
-use ggez::{Context, GameResult};
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
+
 use imgui::{CollapsingHeader, Condition, im_str, ImStr, ImString, Slider, Window};
 use itertools::Itertools;
 

src/main.rs

@@ -1,5 +1,34 @@
 #![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
 
+use std::process::exit;
+
 fn main() {
-    doukutsu_rs::init().unwrap();
+    let result = doukutsu_rs::init();
+
+    #[cfg(target_os = "windows")]
+        unsafe {
+        use winapi::_core::ptr::null_mut;
+        use winapi::um::winuser::MessageBoxW;
+        use winapi::um::winuser::MB_OK;
+        use winapi::shared::ntdef::LPCWSTR;
+        use std::ffi::OsStr;
+        use std::os::windows::prelude::*;
+
+        if let Err(e) = result {
+            let title: LPCWSTR = OsStr::new("Error!")
+                .encode_wide().chain(Some(0)).collect::<Vec<u16>>().as_ptr();
+            let message: LPCWSTR = OsStr::new(format!("Whoops, doukutsu-rs crashed: {}", e).as_str())
+                .encode_wide().chain(Some(0)).collect::<Vec<u16>>().as_ptr();
+            MessageBoxW(null_mut(),
+                        message,
+                        title,
+                        MB_OK);
+            exit(1);
+        }
+    }
+
+    if let Err(e) = result {
+        println!("Initialization error: {}", e);
+        exit(1);
+    }
 }

src/map.rs

@@ -1,10 +1,12 @@
 use std::io;
 
 use byteorder::{LE, ReadBytesExt};
-use ggez::GameError::ResourceLoadError;
-use ggez::GameResult;
+
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 
 use crate::str;
+use crate::framework::error::GameError::ResourceLoadError;
 
 static SUPPORTED_PXM_VERSIONS: [u8; 1] = [0x10];
 static SUPPORTED_PXE_VERSIONS: [u8; 2] = [0, 0x10];
@@ -28,7 +30,6 @@ impl Map {
 
         let version = map_data.read_u8()?;
 
-        // It's something Booster's Lab supports but I haven't seen anywhere being used in practice
         if !SUPPORTED_PXM_VERSIONS.contains(&version) {
             return Err(ResourceLoadError(format!("Unsupported PXM version: {:#x}", version)));
         }

src/menu/mod.rs

@@ -1,12 +1,11 @@
-use ggez::{Context, GameResult};
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 
 use crate::common::Rect;
 use crate::input::combined_menu_controller::CombinedMenuController;
 use crate::shared_game_state::SharedGameState;
 
-pub struct MenuSaveInfo {
-
-}
+pub struct MenuSaveInfo {}
 
 pub enum MenuEntry {
     Hidden,

src/npc/ai/balrog.rs

@@ -1,4 +1,5 @@
-use ggez::GameResult;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 use num_traits::clamp;
 
 use crate::caret::CaretType;

src/npc/ai/booster.rs

@@ -1,4 +1,5 @@
-use ggez::GameResult;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 
 use crate::common::Direction;
 use crate::npc::NPC;

src/npc/ai/chaco.rs

@@ -1,4 +1,5 @@
-use ggez::GameResult;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 
 use crate::caret::CaretType;
 use crate::common::Direction;

src/npc/ai/characters.rs

@@ -1,4 +1,5 @@
-use ggez::GameResult;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 use num_traits::{abs, clamp};
 
 use crate::common::Direction;

src/npc/ai/egg_corridor.rs

@@ -1,4 +1,5 @@
-use ggez::GameResult;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 use num_traits::{abs, clamp};
 
 use crate::caret::CaretType;

src/npc/ai/first_cave.rs

@@ -1,4 +1,5 @@
-use ggez::GameResult;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 use num_traits::clamp;
 
 use crate::common::Direction;

src/npc/ai/grasstown.rs

@@ -1,4 +1,5 @@
-use ggez::GameResult;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 use num_traits::abs;
 use num_traits::clamp;
 

src/npc/ai/igor.rs

@@ -1,6 +1,6 @@
-use ggez::GameResult;
-
 use crate::common::{CDEG_RAD, Direction};
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 use crate::npc::list::NPCList;
 use crate::npc::NPC;
 use crate::player::Player;

src/npc/ai/intro.rs

@@ -1,4 +1,5 @@
-use ggez::GameResult;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 
 use crate::caret::CaretType;
 use crate::common::Direction;

src/npc/ai/last_cave.rs

@@ -1,4 +1,5 @@
-use ggez::GameResult;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 
 use crate::common::Direction;
 use crate::npc::NPC;

src/npc/ai/maze.rs

@@ -1,4 +1,5 @@
-use ggez::GameResult;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 use num_traits::clamp;
 
 use crate::caret::CaretType;

src/npc/ai/mimiga_village.rs

@@ -1,9 +1,10 @@
 use std::cmp::Ordering;
 
-use ggez::GameResult;
 use num_traits::{abs, clamp};
 
 use crate::common::Direction;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 use crate::npc::NPC;
 use crate::player::Player;
 use crate::rng::RNG;

src/npc/ai/misc.rs

@@ -1,4 +1,5 @@
-use ggez::GameResult;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 use num_traits::{abs, clamp};
 
 use crate::caret::CaretType;
@@ -1586,7 +1587,7 @@ impl NPC {
                     npc.y = self.y - 0x1800;
                     npc.tsc_direction = 10 * self.anim_num + 40;
 
-                    npc_list.spawn(0, npc);
+                    let _ = npc_list.spawn(0, npc);
                     self.cond.set_explode_die(true);
                 }
             }
@@ -1629,7 +1630,7 @@ impl NPC {
                 npc.direction = Direction::Right;
                 npc.parent_id = self.id;
 
-                npc_list.spawn(0x100, npc);
+                let _ = npc_list.spawn(0x100, npc);
             }
         }
 

src/npc/ai/misery.rs

@@ -1,7 +1,8 @@
-use ggez::GameResult;
 use num_traits::clamp;
 
 use crate::common::Direction;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 use crate::npc::list::NPCList;
 use crate::npc::NPC;
 use crate::rng::RNG;

src/npc/ai/outer_wall.rs

@@ -1,9 +1,11 @@
-use crate::npc::NPC;
-use crate::shared_game_state::SharedGameState;
-use crate::player::Player;
-use ggez::GameResult;
 use num_traits::abs;
 
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
+use crate::npc::NPC;
+use crate::player::Player;
+use crate::shared_game_state::SharedGameState;
+
 impl NPC {
     pub(crate) fn tick_n215_sandcroc_outer_wall(&mut self, state: &mut SharedGameState, players: [&mut Player; 2]) -> GameResult {
         match self.action_num {

src/npc/ai/pickups.rs

@@ -1,4 +1,5 @@
-use ggez::GameResult;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 use num_traits::clamp;
 
 use crate::common::Direction;

src/npc/ai/quote.rs

@@ -1,4 +1,5 @@
-use ggez::GameResult;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 
 use crate::common::Direction;
 use crate::npc::list::NPCList;

src/npc/ai/sand_zone.rs

@@ -1,4 +1,5 @@
-use ggez::GameResult;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 use num_traits::{abs, clamp};
 
 use crate::caret::CaretType;
@@ -288,7 +289,7 @@ impl NPC {
     }
 
     pub(crate) fn tick_n049_skullhead(&mut self, state: &mut SharedGameState, players: [&mut Player; 2], npc_list: &NPCList) -> GameResult {
-        let mut parent = self.get_parent_ref_mut(npc_list);
+        let parent = self.get_parent_ref_mut(npc_list);
 
         if self.action_num > 9 && parent.as_ref().map(|n| n.npc_type == 3).unwrap_or(false) {
             self.action_num = 3;

src/npc/ai/santa.rs

@@ -1,4 +1,5 @@
-use ggez::GameResult;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 use num_traits::abs;
 
 use crate::common::Direction;

src/npc/ai/sue.rs

@@ -1,4 +1,5 @@
-use ggez::GameResult;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 use num_traits::clamp;
 
 use crate::common::Direction;

src/npc/ai/toroko.rs

@@ -1,4 +1,5 @@
-use ggez::GameResult;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 use num_traits::clamp;
 
 use crate::common::Direction;

src/npc/ai/weapon_trail.rs

@@ -1,4 +1,5 @@
-use ggez::GameResult;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 
 use crate::npc::NPC;
 use crate::shared_game_state::SharedGameState;

src/npc/boss/balfrog.rs

@@ -1,4 +1,5 @@
-use ggez::GameResult;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 
 use crate::caret::CaretType;
 use crate::common::{CDEG_RAD, Direction, Rect};

src/npc/boss/mod.rs

@@ -1,11 +1,11 @@
 use std::mem::MaybeUninit;
 
-use ggez::{Context, GameResult};
-
 use crate::bullet::BulletManager;
 use crate::common::{Direction, interpolate_fix9_scale};
 use crate::entity::GameEntity;
 use crate::frame::Frame;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 use crate::npc::list::NPCList;
 use crate::npc::NPC;
 use crate::player::Player;

src/npc/boss/monster_x.rs

@@ -1,8 +1,9 @@
-use ggez::GameResult;
 use num_traits::{abs, clamp};
 
 use crate::caret::CaretType;
 use crate::common::{CDEG_RAD, Direction, Rect};
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 use crate::npc::boss::BossNPC;
 use crate::npc::list::NPCList;
 use crate::npc::NPC;

src/npc/boss/omega.rs

@@ -1,4 +1,4 @@
-use ggez::GameResult;
+
 
 use crate::bullet::BulletManager;
 use crate::caret::CaretType;
@@ -9,6 +9,8 @@ use crate::npc::NPC;
 use crate::player::Player;
 use crate::rng::RNG;
 use crate::shared_game_state::SharedGameState;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 
 impl NPC {
     pub(crate) fn tick_n048_omega_projectiles(&mut self, state: &mut SharedGameState) -> GameResult {

src/npc/list.rs

@@ -1,7 +1,8 @@
 use std::cell::{Cell, UnsafeCell};
 use std::mem::MaybeUninit;
 
-use ggez::{GameError, GameResult};
+use crate::framework::context::Context;
+use crate::framework::error::{GameResult, GameError};
 
 use crate::npc::NPC;
 

src/npc/mod.rs

@@ -2,7 +2,8 @@ use std::io;
 use std::io::Cursor;
 
 use byteorder::{LE, ReadBytesExt};
-use ggez::{Context, GameResult};
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 use num_traits::abs;
 
 use crate::bitfield;
@@ -283,6 +284,8 @@ impl GameEntity<([&mut Player; 2], &NPCList, &mut Stage, &BulletManager)> for NP
             216 => self.tick_n216_debug_cat(state),
             222 => self.tick_n222_prison_bars(state),
             227 => self.tick_n227_bucket(state),
+            229 => self.tick_n229_red_flowers_sprouts(state),
+            230 => self.tick_n230_red_flowers_blooming(state),
             234 => self.tick_n234_red_flowers_picked(state),
             239 => self.tick_n239_cage_bars(state),
             241 => self.tick_n241_critter_red(state, players),

src/player/mod.rs

@@ -1,6 +1,7 @@
 use std::clone::Clone;
 
-use ggez::{Context, GameResult};
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 use num_derive::FromPrimitive;
 use num_traits::clamp;
 

src/profile.rs

@@ -4,13 +4,15 @@ use byteorder::{BE, LE, ReadBytesExt, WriteBytesExt};
 use num_traits::{clamp, FromPrimitive};
 
 use crate::common::{Direction, FadeState};
-use ggez::{Context, GameResult};
-use ggez::GameError::ResourceLoadError;
+
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 use crate::player::ControlMode;
 use crate::scene::game_scene::GameScene;
 use crate::shared_game_state::SharedGameState;
 use crate::str;
 use crate::weapon::{WeaponLevel, WeaponType};
+use crate::framework::error::GameError::ResourceLoadError;
 
 pub struct WeaponData {
     pub weapon_id: u32,

src/rng.rs

@@ -73,7 +73,7 @@ impl Xoroshiro32PlusPlus {
 
     pub fn next_u16(&self) -> u16 {
         let mut state = self.0.get();
-        let mut result = (state.0.wrapping_add(state.1)).rotate_left(9).wrapping_add(state.0);
+        let result = (state.0.wrapping_add(state.1)).rotate_left(9).wrapping_add(state.0);
 
         state.1 ^= state.0;
         state.0 = state.0.rotate_left(13) ^ state.1 ^ (state.1 << 5);

src/scene/game_scene.rs

@@ -1,19 +1,21 @@
-use ggez::{Context, GameResult, graphics, timer};
-use ggez::graphics::{BlendMode, Color, Drawable, DrawParam, FilterMode, mint};
-use ggez::graphics::spritebatch::SpriteBatch;
-use ggez::nalgebra::{clamp, Vector2};
 use log::info;
-use num_traits::abs;
+use num_traits::{abs, clamp};
 
 use crate::bullet::BulletManager;
 use crate::caret::CaretType;
-use crate::common::{Direction, FadeDirection, FadeState, fix9_scale, interpolate_fix9_scale, Rect};
+use crate::common::{Color, Direction, FadeDirection, FadeState, fix9_scale, interpolate_fix9_scale, Rect};
 use crate::components::boss_life_bar::BossLifeBar;
 use crate::components::draw_common::{Alignment, draw_number};
 use crate::components::hud::HUD;
 use crate::components::stage_select::StageSelect;
 use crate::entity::GameEntity;
 use crate::frame::{Frame, UpdateTarget};
+use crate::framework::backend::SpriteBatchCommand;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
+use crate::framework::graphics;
+use crate::framework::graphics::{BlendMode, FilterMode};
+use crate::framework::ui::Components;
 use crate::input::touch_controls::TouchControlType;
 use crate::inventory::{Inventory, TakeExperienceResult};
 use crate::npc::boss::BossNPC;
@@ -28,7 +30,6 @@ use crate::shared_game_state::{Season, SharedGameState};
 use crate::stage::{BackgroundType, Stage};
 use crate::text_script::{ConfirmSelection, ScriptMode, TextScriptExecutionState, TextScriptVM};
 use crate::texture_set::SizedBatch;
-use crate::ui::Components;
 use crate::weapon::WeaponType;
 
 pub struct GameScene {
@@ -297,18 +298,18 @@ impl GameScene {
                     FadeDirection::Left | FadeDirection::Right => {
                         let mut frame = tick;
 
-                        for x in (0..(state.canvas_size.0 as i32 + 16)).step_by(16) {
-                            if frame > 15 { frame = 15; } else { frame += 1; }
+                        for x in 0..(state.canvas_size.0 as i32 / 16 + 1) {
+                            if frame >= 15 { frame = 15; } else { frame += 1; }
 
                             if frame >= 0 {
-                                rect.left = frame as u16 * 16;
+                                rect.left = frame.abs() as u16 * 16;
                                 rect.right = rect.left + 16;
 
-                                for y in (0..(state.canvas_size.1 as i32 + 16)).step_by(16) {
+                                for y in 0..(state.canvas_size.1 as i32 / 16 + 1) {
                                     if direction == FadeDirection::Left {
-                                        batch.add_rect(state.canvas_size.0 - x as f32, y as f32, &rect);
+                                        batch.add_rect(state.canvas_size.0 - x as f32 * 16.0, y as f32 * 16.0, &rect);
                                     } else {
-                                        batch.add_rect(x as f32, y as f32, &rect);
+                                        batch.add_rect(x as f32 * 16.0, y as f32 * 16.0, &rect);
                                     }
                                 }
                             }
@@ -317,18 +318,18 @@ impl GameScene {
                     FadeDirection::Up | FadeDirection::Down => {
                         let mut frame = tick;
 
-                        for y in (0..(state.canvas_size.1 as i32 + 16)).step_by(16) {
-                            if frame > 15 { frame = 15; } else { frame += 1; }
+                        for y in 0..(state.canvas_size.1 as i32 / 16 + 1) {
+                            if frame >= 15 { frame = 15; } else { frame += 1; }
 
                             if frame >= 0 {
-                                rect.left = frame as u16 * 16;
+                                rect.left = frame.abs() as u16 * 16;
                                 rect.right = rect.left + 16;
 
-                                for x in (0..(state.canvas_size.0 as i32 + 16)).step_by(16) {
+                                for x in 0..(state.canvas_size.0 as i32 / 16 + 1) {
                                     if direction == FadeDirection::Down {
-                                        batch.add_rect(x as f32, y as f32, &rect);
+                                        batch.add_rect(x as f32 * 16.0, y as f32 * 16.0, &rect);
                                     } else {
-                                        batch.add_rect(x as f32, state.canvas_size.1 - y as f32, &rect);
+                                        batch.add_rect(x as f32 * 16.0, state.canvas_size.1 - y as f32 * 16.0, &rect);
                                     }
                                 }
                             }
@@ -339,20 +340,20 @@ impl GameScene {
                         let center_y = (state.canvas_size.1 / 2.0 - 8.0) as i32;
                         let mut start_frame = tick;
 
-                        for x in (0..(center_x + 16)).step_by(16) {
+                        for x in 0..(center_x / 16 + 2) {
                             let mut frame = start_frame;
 
-                            for y in (0..(center_y + 16)).step_by(16) {
-                                if frame > 15 { frame = 15; } else { frame += 1; }
+                            for y in 0..(center_y / 16 + 2) {
+                                if frame >= 15 { frame = 15; } else { frame += 1; }
 
                                 if frame >= 0 {
-                                    rect.left = frame as u16 * 16;
+                                    rect.left = frame.abs() as u16 * 16;
                                     rect.right = rect.left + 16;
 
-                                    batch.add_rect((center_x - x) as f32, (center_y + y) as f32, &rect);
-                                    batch.add_rect((center_x - x) as f32, (center_y - y) as f32, &rect);
-                                    batch.add_rect((center_x + x) as f32, (center_y + y) as f32, &rect);
-                                    batch.add_rect((center_x + x) as f32, (center_y - y) as f32, &rect);
+                                    batch.add_rect((center_x - x * 16) as f32, (center_y + y * 16) as f32, &rect);
+                                    batch.add_rect((center_x - x * 16) as f32, (center_y - y * 16) as f32, &rect);
+                                    batch.add_rect((center_x + x * 16) as f32, (center_y + y * 16) as f32, &rect);
+                                    batch.add_rect((center_x + x * 16) as f32, (center_y - y * 16) as f32, &rect);
                                 }
                             }
 
@@ -433,13 +434,14 @@ impl GameScene {
             };
             let batch = state.texture_set.get_or_load_batch(ctx, &state.constants, tex_name)?;
 
-            // switch version uses +1000 face offset to display a flipped version
+            // switch version uses 1xxx flag to show a flipped version of face
             let flip = state.textscript_vm.face > 1000;
+            // x1xx flag shows a talking animation
+            let talking = (state.textscript_vm.face % 1000) > 100;
             let face_num = state.textscript_vm.face % 100;
-            let (scale_x, scale_y) = batch.scale();
 
-            batch.add_rect_scaled(left_pos + 14.0 + if flip { 48.0 } else { 0.0 }, top_pos + 8.0,
-                                  scale_x * if flip { -1.0 } else { 1.0 }, scale_y,
+            batch.add_rect_flip(left_pos + 14.0, top_pos + 8.0,
+                                    flip, false,
                                   &Rect::new_size(
                                       (face_num as u16 % 6) * 48,
                                       (face_num as u16 / 6) * 48,
@@ -502,7 +504,14 @@ impl GameScene {
     }
 
     fn draw_light_map(&self, state: &mut SharedGameState, ctx: &mut Context) -> GameResult {
-        graphics::set_canvas(ctx, Some(&state.lightmap_canvas));
+        let canvas = state.lightmap_canvas.as_mut();
+        if let None = canvas {
+            return Ok(());
+        }
+
+        let canvas = canvas.unwrap();
+
+        graphics::set_render_target(ctx, Some(canvas));
         graphics::set_blend_mode(ctx, BlendMode::Add)?;
 
         graphics::clear(ctx, Color::from_rgb(100, 100, 110));
@@ -547,9 +556,9 @@ impl GameScene {
                                         fix9_scale(npc.y - self.frame.y, scale),
                                         0.4, (255, 255, 0), batch);
                     }
-                    4 | 7 => self.draw_light(fix9_scale(npc.x - self.frame.x, scale),
-                                             fix9_scale(npc.y - self.frame.y, scale),
-                                             1.0, (100, 100, 100), batch),
+                    7 => self.draw_light(fix9_scale(npc.x - self.frame.x, scale),
+                                         fix9_scale(npc.y - self.frame.y, scale),
+                                         1.0, (100, 100, 100), batch),
                     17 if npc.anim_num == 0 => {
                         self.draw_light(fix9_scale(npc.x - self.frame.x, scale),
                                         fix9_scale(npc.y - self.frame.y, scale),
@@ -584,13 +593,6 @@ impl GameScene {
                                         fix9_scale(npc.y - self.frame.y, scale),
                                         3.5, (130 + flicker, 40 + flicker, 0), batch);
                     }
-                    66 if npc.action_num == 1 && npc.anim_counter % 2 == 0 =>
-                        self.draw_light(fix9_scale(npc.x - self.frame.x, scale),
-                                        fix9_scale(npc.y - self.frame.y, scale),
-                                        3.0, (0, 100, 255), batch),
-                    67 => self.draw_light(fix9_scale(npc.x - self.frame.x, scale),
-                                          fix9_scale(npc.y - self.frame.y, scale),
-                                          2.0, (0, 100, 200), batch),
                     70 => {
                         let flicker = 50 + npc.anim_num as u8 * 15;
                         self.draw_light(fix9_scale(npc.x - self.frame.x, scale),
@@ -635,97 +637,18 @@ impl GameScene {
         }
 
         graphics::set_blend_mode(ctx, BlendMode::Multiply)?;
-        graphics::set_canvas(ctx, Some(&state.game_canvas));
-        state.lightmap_canvas.set_filter(FilterMode::Linear);
-        state.lightmap_canvas.draw(ctx, DrawParam::new()
-            .scale(Vector2::new(1.0 / state.scale, 1.0 / state.scale)))?;
+        graphics::set_render_target(ctx, None)?;
+
+        let rect = Rect { left: 0.0, top: 0.0, right: state.screen_size.0, bottom: state.screen_size.1 };
+        canvas.clear();
+        canvas.add(SpriteBatchCommand::DrawRect(rect, rect));
+        canvas.draw()?;
 
         graphics::set_blend_mode(ctx, BlendMode::Alpha)?;
 
         Ok(())
     }
 
-    fn is_water(&self, tile: u8) -> bool {
-        [0x02, 0x04, 0x60, 0x61, 0x62, 0x64, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0xa0, 0xa1, 0xa2, 0xa3].contains(&tile)
-    }
-
-    fn draw_water(&self, state: &mut SharedGameState, ctx: &mut Context) -> GameResult {
-        let (frame_x, frame_y) = self.frame.xy_interpolated(state.frame_time, state.scale);
-
-        {
-            state.shaders.water_shader_params.resolution = [state.canvas_size.0, state.canvas_size.1];
-            state.shaders.water_shader_params.frame_pos = [frame_x, frame_y];
-            state.shaders.water_shader_params.t = self.tick as f32;
-            let _lock = graphics::use_shader(ctx, &state.shaders.water_shader);
-            state.shaders.water_shader.send(ctx, state.shaders.water_shader_params)?;
-
-            graphics::set_canvas(ctx, Some(&state.tmp_canvas));
-            graphics::clear(ctx, Color::new(0.0, 0.0, 0.0, 1.0));
-            state.game_canvas.draw(ctx, DrawParam::new()
-                .scale(mint::Vector2 { x: 1.0 / state.scale, y: -1.0 / state.scale })
-                .offset(mint::Point2 { x: 0.0, y: -1.0 }))?;
-        }
-        graphics::set_canvas(ctx, Some(&state.game_canvas));
-
-        // cheap, clones a reference underneath
-        let mut tmp_batch = SpriteBatch::new(state.tmp_canvas.image().clone());
-
-        let tile_start_x = clamp(self.frame.x / 0x200 / 16, 0, self.stage.map.width as i32) as usize;
-        let tile_start_y = clamp(self.frame.y / 0x200 / 16, 0, self.stage.map.height as i32) as usize;
-        let tile_end_x = clamp((self.frame.x / 0x200 + 8 + state.canvas_size.0 as i32) / 16 + 1, 0, self.stage.map.width as i32) as usize;
-        let tile_end_y = clamp((self.frame.y / 0x200 + 8 + state.canvas_size.1 as i32) / 16 + 1, 0, self.stage.map.height as i32) as usize;
-        let mut rect = Rect {
-            left: 0.0,
-            top: 0.0,
-            right: 16.0,
-            bottom: 16.0,
-        };
-
-        for y in tile_start_y..tile_end_y {
-            for x in tile_start_x..tile_end_x {
-                let tile = unsafe {
-                    self.stage.map.attrib[*self.stage.map.tiles
-                        .get_unchecked((y * self.stage.map.width as usize) + x) as usize]
-                };
-                let tile_above = unsafe {
-                    self.stage.map.attrib[*self.stage.map.tiles
-                        .get_unchecked((y.saturating_sub(1) * self.stage.map.width as usize) + x) as usize]
-                };
-
-                if !self.is_water(tile) {
-                    continue;
-                }
-
-                rect.left = (x as f32 * 16.0 - 8.0) - frame_x;
-                rect.top = (y as f32 * 16.0 - 8.0) - frame_y;
-                rect.right = rect.left + 16.0;
-                rect.bottom = rect.top + 16.0;
-
-                if tile_above == 0 {
-                    rect.top += 3.0;
-                }
-
-                tmp_batch.add(DrawParam::new()
-                    .src(ggez::graphics::Rect::new(rect.left / state.canvas_size.0,
-                                                   rect.top / state.canvas_size.1,
-                                                   (rect.right - rect.left) / state.canvas_size.0,
-                                                   (rect.bottom - rect.top) / state.canvas_size.1))
-                    .scale(mint::Vector2 {
-                        x: 1.0 / state.scale,
-                        y: 1.0 / state.scale,
-                    })
-                    .dest(mint::Point2 {
-                        x: rect.left,
-                        y: rect.top,
-                    }));
-            }
-        }
-
-        tmp_batch.draw(ctx, DrawParam::new())?;
-
-        Ok(())
-    }
-
     fn draw_tiles(&self, state: &mut SharedGameState, ctx: &mut Context, layer: TileLayer) -> GameResult {
         let tex = match layer {
             TileLayer::Snack => "Npc/NpcSym",
@@ -1291,7 +1214,7 @@ impl Scene for GameScene {
     }
 
     fn draw(&self, state: &mut SharedGameState, ctx: &mut Context) -> GameResult {
-        graphics::set_canvas(ctx, Some(&state.game_canvas));
+        //graphics::set_canvas(ctx, Some(&state.game_canvas));
         self.draw_background(state, ctx)?;
         self.draw_tiles(state, ctx, TileLayer::Background)?;
         if state.settings.shader_effects
@@ -1316,9 +1239,9 @@ impl Scene for GameScene {
         self.draw_bullets(state, ctx)?;
         self.player2.draw(state, ctx, &self.frame)?;
         self.player1.draw(state, ctx, &self.frame)?;
-        if state.settings.shader_effects && self.water_visible {
+        /*if state.settings.shader_effects && self.water_visible {
             self.draw_water(state, ctx)?;
-        }
+        }*/
 
         self.draw_tiles(state, ctx, TileLayer::Foreground)?;
         self.draw_tiles(state, ctx, TileLayer::Snack)?;
@@ -1329,9 +1252,9 @@ impl Scene for GameScene {
             self.draw_light_map(state, ctx)?;
         }
 
-        graphics::set_canvas(ctx, None);
+        /*graphics::set_canvas(ctx, None);
         state.game_canvas.draw(ctx, DrawParam::new()
-            .scale(Vector2::new(1.0 / state.scale, 1.0 / state.scale)))?;
+            .scale(Vector2::new(1.0 / state.scale, 1.0 / state.scale)))?;*/
         self.draw_black_bars(state, ctx)?;
 
         if state.control_flags.control_enabled() {
@@ -1389,7 +1312,7 @@ impl Scene for GameScene {
             self.draw_debug_outlines(state, ctx)?;
         }
 
-        draw_number(state.canvas_size.0 - 8.0, 8.0, timer::fps(ctx) as usize, Alignment::Right, state, ctx)?;
+        //draw_number(state.canvas_size.0 - 8.0, 8.0, timer::fps(ctx) as usize, Alignment::Right, state, ctx)?;
         Ok(())
     }
 

src/scene/loading_scene.rs

@@ -1,5 +1,6 @@
-use ggez::{Context, filesystem, GameResult};
-
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
+use crate::framework::filesystem;
 use crate::npc::NPCTable;
 use crate::scene::no_data_scene::NoDataScene;
 use crate::scene::Scene;

src/scene/mod.rs

@@ -1,7 +1,8 @@
-use ggez::{Context, GameResult};
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 
 use crate::shared_game_state::SharedGameState;
-use crate::ui::Components;
+use crate::framework::ui::Components;
 
 pub mod game_scene;
 pub mod loading_scene;

src/scene/no_data_scene.rs

@@ -1,4 +1,5 @@
-use ggez::{Context, GameError, GameResult};
+use crate::framework::context::Context;
+use crate::framework::error::{GameResult, GameError};
 
 use crate::common::Rect;
 use crate::scene::Scene;
@@ -18,11 +19,11 @@ impl NoDataScene {
     }
 }
 
+#[cfg(target_os = "android")]
 static REL_URL: &str = "https://github.com/doukutsu-rs/game-data/releases";
 
 impl Scene for NoDataScene {
     fn tick(&mut self, state: &mut SharedGameState, ctx: &mut Context) -> GameResult {
-
         #[cfg(target_os = "android")]
             {
                 if !self.flag {

src/scene/title_scene.rs

@@ -1,12 +1,12 @@
-use ggez::{Context, GameResult, graphics};
-use ggez::graphics::Color;
-
-use crate::common::{Rect, VERSION_BANNER};
+use crate::common::{Rect, VERSION_BANNER, Color};
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
+use crate::framework::graphics;
+use crate::input::combined_menu_controller::CombinedMenuController;
+use crate::input::touch_controls::TouchControlType;
 use crate::menu::{Menu, MenuEntry, MenuSelectionResult};
 use crate::scene::Scene;
 use crate::shared_game_state::{SharedGameState, TimingMode};
-use crate::input::combined_menu_controller::CombinedMenuController;
-use crate::input::touch_controls::TouchControlType;
 
 #[derive(PartialEq, Eq, Copy, Clone)]
 #[repr(u8)]

src/scripting/doukutsu.d.ts

@@ -14,9 +14,24 @@ declare interface DoukutsuScene {
     tick(): number;
 
     /**
-     * Returns player at specified index.
+     * Returns a list of players connected to current game.
      */
-    player(index: number): DoukutsuPlayer | null;
+    onlinePlayers(): DoukutsuPlayer[];
+
+    /**
+     * Returns a list of players on current map.
+     */
+    mapPlayers(): DoukutsuPlayer[];
+
+    /**
+     * Returns the id of local player.
+     */
+    localPlayerId(): number;
+
+    /**
+     * Returns player with specified id.
+     */
+    player(id: number): DoukutsuPlayer | null;
 };
 
 declare namespace doukutsu {

src/scripting/doukutsu.rs

@@ -1,14 +1,13 @@
 use lua_ffi::ffi::luaL_Reg;
 use lua_ffi::{LuaObject, State, c_int};
 
-use crate::scene::game_scene::GameScene;
 use crate::scripting::LuaScriptingState;
-use crate::shared_game_state::SharedGameState;
 
 pub struct Doukutsu {
     pub ptr: *mut LuaScriptingState,
 }
 
+#[allow(unused)]
 impl Doukutsu {
     pub fn new(ptr: *mut LuaScriptingState) -> Doukutsu {
         Doukutsu {

src/scripting/mod.rs

@@ -1,14 +1,18 @@
-use std::io::{Read, Seek};
+use std::io::Read;
 use std::ptr::null_mut;
 
-use ggez::{Context, filesystem, GameError, GameResult};
-use ggez::filesystem::File;
-use lua_ffi::{c_int, LuaFunction, LuaObject, State, ThreadStatus};
-use lua_ffi::ffi::lua_pushcfunction;
+
+use crate::framework::context::Context;
+use crate::framework::error::{GameResult, GameError};
+
+
+use lua_ffi::{c_int, State, ThreadStatus};
 
 use crate::scene::game_scene::GameScene;
 use crate::scripting::doukutsu::Doukutsu;
 use crate::shared_game_state::SharedGameState;
+use crate::framework::filesystem::File;
+use crate::framework::filesystem;
 
 mod doukutsu;
 mod player;
@@ -112,7 +116,7 @@ impl LuaScriptingState {
 
         if filesystem::exists(ctx, "/scripts/") {
             let mut script_count = 0;
-            let mut files = filesystem::read_dir(ctx, "/scripts/")?
+            let files = filesystem::read_dir(ctx, "/scripts/")?
                 .filter(|f| f.to_string_lossy().to_lowercase().ends_with(".lua"));
 
             for file in files {

src/scripting/player.rs

@@ -12,6 +12,7 @@ pub struct LuaPlayer {
     inv_ptr: *mut Inventory,
 }
 
+#[allow(unused)]
 impl LuaPlayer {
     fn check_ref(&self, state: &mut State) -> bool {
         if !self.valid_reference {

src/settings.rs

@@ -1,11 +1,12 @@
-use ggez::{Context, GameResult};
 use serde::{Deserialize, Serialize};
-use winit::event::VirtualKeyCode;
 
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
+use crate::framework::keyboard::ScanCode;
 use crate::input::keyboard_player_controller::KeyboardController;
 use crate::input::player_controller::PlayerController;
-use crate::player::TargetPlayer;
 use crate::input::touch_player_controller::TouchPlayerController;
+use crate::player::TargetPlayer;
 
 #[derive(Serialize, Deserialize)]
 pub struct Settings {
@@ -66,47 +67,47 @@ impl Default for Settings {
 
 #[derive(Serialize, Deserialize)]
 pub struct PlayerKeyMap {
-    pub left: VirtualKeyCode,
-    pub up: VirtualKeyCode,
-    pub right: VirtualKeyCode,
-    pub down: VirtualKeyCode,
-    pub prev_weapon: VirtualKeyCode,
-    pub next_weapon: VirtualKeyCode,
-    pub jump: VirtualKeyCode,
-    pub shoot: VirtualKeyCode,
-    pub skip: VirtualKeyCode,
-    pub inventory: VirtualKeyCode,
-    pub map: VirtualKeyCode,
+    pub left: ScanCode,
+    pub up: ScanCode,
+    pub right: ScanCode,
+    pub down: ScanCode,
+    pub prev_weapon: ScanCode,
+    pub next_weapon: ScanCode,
+    pub jump: ScanCode,
+    pub shoot: ScanCode,
+    pub skip: ScanCode,
+    pub inventory: ScanCode,
+    pub map: ScanCode,
 }
 
 fn p1_default_keymap() -> PlayerKeyMap {
     PlayerKeyMap {
-        left: VirtualKeyCode::Left,
-        up: VirtualKeyCode::Up,
-        right: VirtualKeyCode::Right,
-        down: VirtualKeyCode::Down,
-        prev_weapon: VirtualKeyCode::A,
-        next_weapon: VirtualKeyCode::S,
-        jump: VirtualKeyCode::Z,
-        shoot: VirtualKeyCode::X,
-        skip: VirtualKeyCode::LControl,
-        inventory: VirtualKeyCode::Q,
-        map: VirtualKeyCode::W,
+        left: ScanCode::Left,
+        up: ScanCode::Up,
+        right: ScanCode::Right,
+        down: ScanCode::Down,
+        prev_weapon: ScanCode::A,
+        next_weapon: ScanCode::S,
+        jump: ScanCode::Z,
+        shoot: ScanCode::X,
+        skip: ScanCode::LControl,
+        inventory: ScanCode::Q,
+        map: ScanCode::W,
     }
 }
 
 fn p2_default_keymap() -> PlayerKeyMap {
     PlayerKeyMap {
-        left: VirtualKeyCode::Comma,
-        up: VirtualKeyCode::L,
-        right: VirtualKeyCode::Slash,
-        down: VirtualKeyCode::Period,
-        prev_weapon: VirtualKeyCode::G,
-        next_weapon: VirtualKeyCode::H,
-        jump: VirtualKeyCode::B,
-        shoot: VirtualKeyCode::N,
-        skip: VirtualKeyCode::RControl,
-        inventory: VirtualKeyCode::T,
-        map: VirtualKeyCode::Y,
+        left: ScanCode::Comma,
+        up: ScanCode::L,
+        right: ScanCode::Slash,
+        down: ScanCode::Period,
+        prev_weapon: ScanCode::G,
+        next_weapon: ScanCode::H,
+        jump: ScanCode::B,
+        shoot: ScanCode::N,
+        skip: ScanCode::U,
+        inventory: ScanCode::T,
+        map: ScanCode::Y,
     }
 }

src/shaders.rs

@@ -1,6 +1,7 @@
 use gfx::{self, *};
-use ggez::graphics::Shader;
-use ggez::{Context, GameResult};
+
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
 
 gfx_defines! {
     constant WaterShaderParams {
@@ -11,7 +12,7 @@ gfx_defines! {
 }
 
 pub struct Shaders {
-    pub water_shader: Shader<WaterShaderParams>,
+    //pub water_shader: Shader<WaterShaderParams>,
     pub water_shader_params: WaterShaderParams,
 }
 
@@ -24,14 +25,14 @@ impl Shaders {
         };
 
         Ok(Shaders {
-            water_shader: Shader::new(
+            /*water_shader: Shader::new(
                 ctx,
                 "/builtin/shaders/basic_es300.vert.glsl",
                 "/builtin/shaders/water_es300.frag.glsl",
                 water_shader_params,
                 "WaterShaderParams",
                 None,
-            )?,
+            )?,*/
             water_shader_params,
         })
     }

src/shared_game_state.rs

@@ -1,17 +1,17 @@
 use std::ops::Div;
-use std::time::Instant;
 
 use bitvec::vec::BitVec;
 use chrono::{Datelike, Local};
-use ggez::{Context, filesystem, GameResult, graphics};
-use ggez::filesystem::OpenOptions;
-use ggez::graphics::Canvas;
 use num_traits::clamp;
+use num_traits::real::Real;
 
 use crate::bmfont_renderer::BMFontRenderer;
 use crate::caret::{Caret, CaretType};
 use crate::common::{ControlFlags, Direction, FadeState};
 use crate::engine_constants::EngineConstants;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
+use crate::framework::vfs::OpenOptions;
 use crate::input::touch_controls::TouchControls;
 use crate::npc::NPCTable;
 use crate::profile::GameProfile;
@@ -21,12 +21,15 @@ use crate::scene::Scene;
 #[cfg(feature = "scripting")]
 use crate::scripting::LuaScriptingState;
 use crate::settings::Settings;
-use crate::shaders::Shaders;
 use crate::sound::SoundManager;
 use crate::stage::StageData;
 use crate::str;
 use crate::text_script::{ScriptMode, TextScriptExecutionState, TextScriptVM};
-use crate::texture_set::{TextureSet};
+use crate::texture_set::TextureSet;
+use crate::framework::{filesystem, graphics};
+use crate::framework::backend::BackendTexture;
+use crate::framework::graphics::{set_render_target, create_texture_mutable};
+use crate::framework::keyboard::ScanCode;
 
 #[derive(PartialEq, Eq, Copy, Clone)]
 pub enum TimingMode {
@@ -101,15 +104,13 @@ pub struct SharedGameState {
     pub npc_super_pos: (i32, i32),
     pub stages: Vec<StageData>,
     pub frame_time: f64,
+    pub debugger: bool,
     pub scale: f32,
-    pub shaders: Shaders,
-    pub tmp_canvas: Canvas,
-    pub game_canvas: Canvas,
-    pub lightmap_canvas: Canvas,
     pub canvas_size: (f32, f32),
     pub screen_size: (f32, f32),
     pub next_scene: Option<Box<dyn Scene>>,
     pub textscript_vm: TextScriptVM,
+    pub lightmap_canvas: Option<Box<dyn BackendTexture>>,
     pub season: Season,
     pub constants: EngineConstants,
     pub font: BMFontRenderer,
@@ -118,16 +119,11 @@ pub struct SharedGameState {
     pub lua: LuaScriptingState,
     pub sound_manager: SoundManager,
     pub settings: Settings,
-    pub shutdown: bool,
+    pub shutdown: bool
 }
 
 impl SharedGameState {
     pub fn new(ctx: &mut Context) -> GameResult<SharedGameState> {
-        let screen_size = graphics::drawable_size(ctx);
-        let scale = screen_size.1.div(235.0).floor().max(1.0);
-
-        let canvas_size = (screen_size.0 / scale, screen_size.1 / scale);
-
         let mut constants = EngineConstants::defaults();
         let mut base_path = "/";
         let settings = Settings::load(ctx)?;
@@ -164,7 +160,7 @@ impl SharedGameState {
             game_flags: bitvec::bitvec![0; 8000],
             fade_state: FadeState::Hidden,
             game_rng: XorShift::new(0),
-            effect_rng: XorShift::new(Instant::now().elapsed().as_nanos() as i32),
+            effect_rng: XorShift::new(123),
             quake_counter: 0,
             teleporter_slots: Vec::with_capacity(8),
             carets: Vec::with_capacity(32),
@@ -174,15 +170,13 @@ impl SharedGameState {
             npc_super_pos: (0, 0),
             stages: Vec::with_capacity(96),
             frame_time: 0.0,
-            scale,
-            shaders: Shaders::new(ctx)?,
-            tmp_canvas: Canvas::with_window_size(ctx)?,
-            game_canvas: Canvas::with_window_size(ctx)?,
-            lightmap_canvas: Canvas::with_window_size(ctx)?,
-            screen_size,
-            canvas_size,
+            debugger: false,
+            scale: 2.0,
+            screen_size: (640.0, 480.0),
+            canvas_size: (320.0, 240.0),
             next_scene: None,
             textscript_vm: TextScriptVM::new(),
+            lightmap_canvas: None,
             season,
             constants,
             font,
@@ -195,6 +189,28 @@ impl SharedGameState {
         })
     }
 
+    pub fn process_debug_keys(&mut self, key_code: ScanCode) {
+        match key_code {
+            ScanCode::F3 => { self.settings.god_mode = !self.settings.god_mode }
+            ScanCode::F4 => { self.settings.infinite_booster = !self.settings.infinite_booster }
+            ScanCode::F5 => { self.settings.subpixel_coords = !self.settings.subpixel_coords }
+            ScanCode::F6 => { self.settings.motion_interpolation = !self.settings.motion_interpolation }
+            ScanCode::F7 => { self.set_speed(1.0) }
+            ScanCode::F8 => {
+                if self.settings.speed > 0.2 {
+                    self.set_speed(self.settings.speed - 0.1);
+                }
+            }
+            ScanCode::F9 => {
+                if self.settings.speed < 3.0 {
+                    self.set_speed(self.settings.speed + 0.1);
+                }
+            }
+            ScanCode::F10 => { self.settings.debug_outlines = !self.settings.debug_outlines }
+            _ => {}
+        }
+    }
+
     pub fn reload_textures(&mut self) {
         let mut texture_set = TextureSet::new(self.base_path.as_str());
 
@@ -288,11 +304,15 @@ impl SharedGameState {
     }
 
     pub fn handle_resize(&mut self, ctx: &mut Context) -> GameResult {
-        self.screen_size = graphics::drawable_size(ctx);
-        self.scale = self.screen_size.1.div(240.0).floor().max(1.0);
+        self.screen_size = graphics::screen_size(ctx);
+        self.scale = self.screen_size.1.div(230.0).floor().max(1.0);
         self.canvas_size = (self.screen_size.0 / self.scale, self.screen_size.1 / self.scale);
 
-        graphics::set_screen_coordinates(ctx, graphics::Rect::new(0.0, 0.0, self.screen_size.0, self.screen_size.1))?;
+        let (width, height) = (self.screen_size.0 as u16, self.screen_size.1 as u16);
+
+        // ensure no texture is bound before destroying them.
+        set_render_target(ctx, None)?;
+        self.lightmap_canvas = Some(create_texture_mutable(ctx, width, height)?);
 
         Ok(())
     }
@@ -312,10 +332,6 @@ impl SharedGameState {
     pub fn set_speed(&mut self, value: f64) {
         self.settings.speed = clamp(value, 0.1, 3.0);
         self.frame_time = 0.0;
-
-        if let Err(err) = self.sound_manager.set_speed(value as f32) {
-            log::error!("Error while sending a message to sound manager: {}", err);
-        }
     }
 
     pub fn current_tps(&self) -> f64 {

src/sound/mod.rs

@@ -4,16 +4,18 @@ use std::time::Duration;
 
 use cpal::Sample;
 use cpal::traits::{DeviceTrait, HostTrait, StreamTrait};
-use ggez::{Context, filesystem, GameResult};
-use ggez::GameError::{AudioError, InvalidValue, ResourceLoadError};
 use num_traits::clamp;
 
 use crate::engine_constants::EngineConstants;
+use crate::framework::context::Context;
+use crate::framework::error::{GameResult};
+use crate::framework::filesystem;
 use crate::sound::organya::Song;
 use crate::sound::pixtone::PixTonePlayback;
 use crate::sound::playback::{PlaybackEngine, SavedPlaybackState};
 use crate::sound::wave_bank::SoundBank;
 use crate::str;
+use crate::framework::error::GameError::{AudioError, ResourceLoadError, InvalidValue};
 
 mod wave_bank;
 mod organya;
@@ -126,13 +128,19 @@ impl SoundManager {
                 .find(|path| filesystem::exists(ctx, path))
                 .ok_or_else(|| ResourceLoadError(format!("BGM {:?} does not exist.", song_name)))?;
 
-            let org = organya::Song::load_from(filesystem::open(ctx, path)?)?;
-            log::info!("Playing BGM: {}", song_name);
+            match filesystem::open(ctx, path).map(|f| organya::Song::load_from(f)) {
+                Ok(Ok(org)) => {
+                    log::info!("Playing BGM: {} {}", song_id, song_name);
 
-            self.prev_song_id = self.current_song_id;
-            self.current_song_id = song_id;
-            self.tx.send(PlaybackMessage::SaveState)?;
-            self.tx.send(PlaybackMessage::PlaySong(Box::new(org)))?;
+                    self.prev_song_id = self.current_song_id;
+                    self.current_song_id = song_id;
+                    self.tx.send(PlaybackMessage::SaveState)?;
+                    self.tx.send(PlaybackMessage::PlaySong(Box::new(org)))?;
+                }
+                Ok(Err(err)) | Err(err) => {
+                    log::warn!("Failed to load BGM {}: {}", song_id, err);
+                }
+            }
         }
         Ok(())
     }

src/sound/organya.rs

@@ -1,12 +1,18 @@
+use std::io;
+
+use byteorder::{LE, ReadBytesExt};
+
+use crate::framework::error::{GameError, GameResult};
+
 #[repr(u8)]
-#[derive(Debug, Copy, Clone)]
+#[derive(Debug, Copy, Clone, Eq, PartialEq)]
 pub enum Version {
     // Can't find any files with this signature,
     // But apparently these files had no Pi flag.
     Beta = b'1',
     Main = b'2',
     // OrgMaker 2.05 Extended Drums
-    Extended = b'3'
+    Extended = b'3',
 }
 
 #[derive(Debug, Copy, Clone)]
@@ -14,19 +20,19 @@ pub struct LoopRange {
     // inclusive
     pub start: i32,
     // exclusive
-    pub end: i32
+    pub end: i32,
 }
 
 #[derive(Debug, Copy, Clone)]
 pub struct Display {
     pub beats: u8,
-    pub steps: u8
+    pub steps: u8,
 }
 
 #[derive(Debug, Copy, Clone)]
 pub struct Timing {
     pub wait: u16,
-    pub loop_range: LoopRange
+    pub loop_range: LoopRange,
 }
 
 #[derive(Copy, Clone)]
@@ -35,12 +41,12 @@ pub struct Instrument {
     pub freq: u16,
     pub inst: u8,
     pub pipi: u8,
-    pub notes: u16
+    pub notes: u16,
 }
 
 pub struct Track {
     pub inst: Instrument,
-    pub notes: Vec<Note>
+    pub notes: Vec<Note>,
 }
 
 impl Clone for Track {
@@ -65,14 +71,14 @@ pub struct Note {
     pub key: u8,
     pub len: u8,
     pub vol: u8,
-    pub pan: u8
+    pub pan: u8,
 }
 
 #[derive(Debug)]
 pub struct Song {
     pub version: Version,
     pub time: Timing,
-    pub tracks: [Track; 16]
+    pub tracks: [Track; 16],
 }
 
 impl Clone for Song {
@@ -85,85 +91,82 @@ impl Clone for Song {
     }
 }
 
-use byteorder::{LE, ReadBytesExt};
-use std::io;
-
 impl Song {
     pub fn empty() -> Song {
         Song {
             version: Version::Main,
             time: Timing { wait: 8, loop_range: LoopRange { start: 0, end: 1 } },
             tracks: [
-                Track { inst: Instrument {freq: 1000, inst: 0, pipi: 0, notes: 0}, notes: vec![] },
-                Track { inst: Instrument {freq: 1000, inst: 0, pipi: 0, notes: 0}, notes: vec![] },
-                Track { inst: Instrument {freq: 1000, inst: 0, pipi: 0, notes: 0}, notes: vec![] },
-                Track { inst: Instrument {freq: 1000, inst: 0, pipi: 0, notes: 0}, notes: vec![] },
-                Track { inst: Instrument {freq: 1000, inst: 0, pipi: 0, notes: 0}, notes: vec![] },
-                Track { inst: Instrument {freq: 1000, inst: 0, pipi: 0, notes: 0}, notes: vec![] },
-                Track { inst: Instrument {freq: 1000, inst: 0, pipi: 0, notes: 0}, notes: vec![] },
-                Track { inst: Instrument {freq: 1000, inst: 0, pipi: 0, notes: 0}, notes: vec![] },
-                Track { inst: Instrument {freq: 1000, inst: 0, pipi: 0, notes: 0}, notes: vec![] },
-                Track { inst: Instrument {freq: 1000, inst: 0, pipi: 0, notes: 0}, notes: vec![] },
-                Track { inst: Instrument {freq: 1000, inst: 0, pipi: 0, notes: 0}, notes: vec![] },
-                Track { inst: Instrument {freq: 1000, inst: 0, pipi: 0, notes: 0}, notes: vec![] },
-                Track { inst: Instrument {freq: 1000, inst: 0, pipi: 0, notes: 0}, notes: vec![] },
-                Track { inst: Instrument {freq: 1000, inst: 0, pipi: 0, notes: 0}, notes: vec![] },
-                Track { inst: Instrument {freq: 1000, inst: 0, pipi: 0, notes: 0}, notes: vec![] },
-                Track { inst: Instrument {freq: 1000, inst: 0, pipi: 0, notes: 0}, notes: vec![] },
-            ]
+                Track { inst: Instrument { freq: 1000, inst: 0, pipi: 0, notes: 0 }, notes: vec![] },
+                Track { inst: Instrument { freq: 1000, inst: 0, pipi: 0, notes: 0 }, notes: vec![] },
+                Track { inst: Instrument { freq: 1000, inst: 0, pipi: 0, notes: 0 }, notes: vec![] },
+                Track { inst: Instrument { freq: 1000, inst: 0, pipi: 0, notes: 0 }, notes: vec![] },
+                Track { inst: Instrument { freq: 1000, inst: 0, pipi: 0, notes: 0 }, notes: vec![] },
+                Track { inst: Instrument { freq: 1000, inst: 0, pipi: 0, notes: 0 }, notes: vec![] },
+                Track { inst: Instrument { freq: 1000, inst: 0, pipi: 0, notes: 0 }, notes: vec![] },
+                Track { inst: Instrument { freq: 1000, inst: 0, pipi: 0, notes: 0 }, notes: vec![] },
+                Track { inst: Instrument { freq: 1000, inst: 0, pipi: 0, notes: 0 }, notes: vec![] },
+                Track { inst: Instrument { freq: 1000, inst: 0, pipi: 0, notes: 0 }, notes: vec![] },
+                Track { inst: Instrument { freq: 1000, inst: 0, pipi: 0, notes: 0 }, notes: vec![] },
+                Track { inst: Instrument { freq: 1000, inst: 0, pipi: 0, notes: 0 }, notes: vec![] },
+                Track { inst: Instrument { freq: 1000, inst: 0, pipi: 0, notes: 0 }, notes: vec![] },
+                Track { inst: Instrument { freq: 1000, inst: 0, pipi: 0, notes: 0 }, notes: vec![] },
+                Track { inst: Instrument { freq: 1000, inst: 0, pipi: 0, notes: 0 }, notes: vec![] },
+                Track { inst: Instrument { freq: 1000, inst: 0, pipi: 0, notes: 0 }, notes: vec![] },
+            ],
         }
     }
 
-    pub fn load_from<R: io::Read>(mut f: R) -> io::Result<Song> {
+    pub fn load_from<R: io::Read>(mut f: R) -> GameResult<Song> {
         let mut magic = [0; 6];
-        
+
         f.read_exact(&mut magic)?;
-        
-        let version = 
+
+        let version =
             match &magic {
                 b"Org-01" => Version::Beta,
                 b"Org-02" => Version::Main,
                 b"Org-03" => Version::Extended,
-                _         => return Err(io::Error::new(io::ErrorKind::InvalidData, "Invalid magic number"))
+                _ => return Err(GameError::ResourceLoadError("Invalid magic number".to_string()))
             };
-        
-        let wait  = f.read_u16::<LE>()?;
-        let _bpm  = f.read_u8()?;
-        let _spb  = f.read_u8()?;
+
+        let wait = f.read_u16::<LE>()?;
+        let _bpm = f.read_u8()?;
+        let _spb = f.read_u8()?;
         let start = f.read_i32::<LE>()?;
-        let end   = f.read_i32::<LE>()?;
-        
+        let end = f.read_i32::<LE>()?;
+
         use std::mem::MaybeUninit as Mu;
-        
+
         let mut insts: [Mu<Instrument>; 16] = unsafe {
             Mu::uninit().assume_init()
         };
-        
+
         for i in insts.iter_mut() {
-            let freq  = f.read_u16::<LE>()?;
-            let inst  = f.read_u8()?;
-            let pipi  = f.read_u8()?;
+            let freq = f.read_u16::<LE>()?;
+            let inst = f.read_u8()?;
+            let pipi = f.read_u8()?;
             let notes = f.read_u16::<LE>()?;
-            
+
             *i = Mu::new(Instrument {
                 freq,
                 inst,
                 pipi,
-                notes
+                notes,
             });
         }
-        
+
         let insts: [Instrument; 16] = unsafe {
             std::mem::transmute(insts)
         };
-        
+
         let mut tracks: [Mu<Track>; 16] = unsafe {
             Mu::uninit().assume_init()
         };
-        
+
         for (i, t) in tracks.iter_mut().enumerate() {
             let count = insts[i].notes as usize;
-            
+
             #[repr(C)]
             #[derive(Copy, Clone)]
             struct UninitNote {
@@ -171,55 +174,55 @@ impl Song {
                 key: Mu<u8>,
                 len: Mu<u8>,
                 vol: Mu<u8>,
-                pan: Mu<u8>
+                pan: Mu<u8>,
             }
-            
+
             let mut notes: Vec<UninitNote> = unsafe {
                 vec![Mu::uninit().assume_init(); count]
             };
-                
+
             for note in notes.iter_mut() {
                 note.pos = Mu::new(f.read_i32::<LE>()?);
             }
-            
+
             for note in notes.iter_mut() {
                 note.key = Mu::new(f.read_u8()?);
             }
-            
+
             for note in notes.iter_mut() {
                 note.len = Mu::new(f.read_u8()?);
             }
-            
+
             for note in notes.iter_mut() {
                 note.vol = Mu::new(f.read_u8()?);
             }
-            
+
             for note in notes.iter_mut() {
                 note.pan = Mu::new(f.read_u8()?);
             }
-            
+
             *t = Mu::new(Track {
                 inst: insts[i],
-                notes: unsafe { std::mem::transmute(notes) }
+                notes: unsafe { std::mem::transmute(notes) },
             });
         }
-        
+
         let tracks = unsafe {
             std::mem::transmute(tracks)
         };
-        
+
         let song = Song {
             version,
             time: Timing {
                 wait,
                 loop_range: LoopRange {
                     start,
-                    end
-                }
+                    end,
+                },
             },
-            tracks
+            tracks,
         };
-        
+
         Ok(song)
     }
 }

src/sound/playback.rs

@@ -1,6 +1,6 @@
 use std::mem::MaybeUninit;
 
-use crate::sound::organya::Song as Organya;
+use crate::sound::organya::{Song as Organya, Version};
 use crate::sound::stuff::*;
 use crate::sound::wav::*;
 use crate::sound::wave_bank::SoundBank;
@@ -144,8 +144,12 @@ impl PlaybackEngine {
             }
         }
 
-        for (idx, (_track, buf)) in song.tracks[8..].iter().zip(self.track_buffers[128..].iter_mut()).enumerate() {
-            *buf = RenderBuffer::new(samples.samples[idx].clone());
+        for (idx, (track, buf)) in song.tracks[8..].iter().zip(self.track_buffers[128..].iter_mut()).enumerate() {
+            if self.song.version == Version::Extended {
+                *buf = RenderBuffer::new(samples.samples[track.inst.inst as usize].clone());
+            } else {
+                *buf = RenderBuffer::new(samples.samples[idx].clone());
+            }
         }
 
         self.song = song;
@@ -162,6 +166,7 @@ impl PlaybackEngine {
         self.play_pos = position;
     }
 
+    #[allow(unused)]
     pub fn get_total_samples(&self) -> u32 {
         let ticks_intro = self.song.time.loop_range.start;
         let ticks_loop = self.song.time.loop_range.end - self.song.time.loop_range.start;

src/stage.rs

@@ -7,10 +7,12 @@ use log::info;
 
 use crate::encoding::read_cur_shift_jis;
 use crate::engine_constants::EngineConstants;
-use ggez::{Context, filesystem, GameResult};
-use ggez::GameError::ResourceLoadError;
+use crate::framework::context::Context;
+use crate::framework::error::GameResult;
+use crate::framework::filesystem;
 use crate::map::{Map, NPCData};
 use crate::text_script::TextScript;
+use crate::framework::error::GameError::ResourceLoadError;
 
 #[derive(Debug, PartialEq, Eq, Hash)]
 pub struct NpcType {

src/text_script.rs

@@ -9,8 +9,6 @@ use std::ops::Not;
 use std::str::FromStr;
 
 use byteorder::ReadBytesExt;
-use ggez::{Context, GameResult};
-use ggez::GameError::{InvalidValue, ParseError};
 use itertools::Itertools;
 use num_derive::FromPrimitive;
 use num_traits::{clamp, FromPrimitive};
@@ -21,6 +19,9 @@ use crate::encoding::{read_cur_shift_jis, read_cur_wtf8};
 use crate::engine_constants::EngineConstants;
 use crate::entity::GameEntity;
 use crate::frame::UpdateTarget;
+use crate::framework::context::Context;
+use crate::framework::error::GameError::{InvalidValue, ParseError};
+use crate::framework::error::GameResult;
 use crate::npc::NPC;
 use crate::player::{ControlMode, TargetPlayer};
 use crate::scene::game_scene::GameScene;
@@ -1750,6 +1751,7 @@ impl TextScript {
         }
     }
 
+    #[allow(unused)]
     fn read_varint<I: Iterator<Item=u8>>(iter: &mut I) -> GameResult<i32> {
         let mut result = 0u32;
 

src/texture_set.rs

@@ -1,27 +1,27 @@
 use std::collections::HashMap;
 use std::io::{BufReader, Read, Seek, SeekFrom};
 
-use ggez;
-use ggez::{Context, GameError, GameResult, graphics};
-use ggez::filesystem;
-use ggez::graphics::{Drawable, DrawMode, DrawParam, FilterMode, Image, Mesh, mint, Rect};
-use ggez::graphics::spritebatch::SpriteBatch;
-use ggez::nalgebra::{Point2, Vector2};
 use image::RgbaImage;
 use itertools::Itertools;
 use log::info;
 
 use crate::common;
-use crate::common::FILE_TYPES;
+use crate::common::{FILE_TYPES, Rect};
 use crate::engine_constants::EngineConstants;
+use crate::framework::backend::{BackendTexture, SpriteBatchCommand};
+use crate::framework::context::Context;
+use crate::framework::error::{GameError, GameResult};
+use crate::framework::filesystem;
+use crate::framework::graphics::{create_texture, FilterMode};
 use crate::settings::Settings;
 use crate::shared_game_state::Season;
 use crate::str;
 
+pub static mut I_MAG: f32 = 1.0;
 pub static mut G_MAG: f32 = 1.0;
 
 pub struct SizedBatch {
-    pub batch: SpriteBatch,
+    batch: Box<dyn BackendTexture>,
     width: usize,
     height: usize,
     real_width: usize,
@@ -66,22 +66,65 @@ impl SizedBatch {
         self.batch.clear();
     }
 
-    pub fn add(&mut self, x: f32, y: f32) {
-        let param = DrawParam::new()
-            .dest(Point2::new(x, y))
-            .scale(Vector2::new(self.scale_x, self.scale_y));
+    pub fn add(&mut self, mut x: f32, mut y: f32) {
+        unsafe {
+            x = (x * G_MAG).round() / G_MAG;
+            y = (y * G_MAG).round() / G_MAG;
+        }
+        let mag = unsafe { I_MAG };
 
-        self.batch.add(param);
+        self.batch.add(SpriteBatchCommand::DrawRect(
+            Rect {
+                left: 0 as f32,
+                top: 0 as f32,
+                right: self.real_width as f32,
+                bottom: self.real_height as f32,
+            },
+            Rect {
+                left: x * mag,
+                top: y * mag,
+                right: (x + self.width() as f32) * mag,
+                bottom: (y + self.height() as f32) * mag,
+            },
+        ));
     }
 
     #[inline(always)]
     pub fn add_rect(&mut self, x: f32, y: f32, rect: &common::Rect<u16>) {
-        self.add_rect_scaled(x, y, self.scale_x, self.scale_y, rect)
+        self.add_rect_scaled(x, y, 1.0, 1.0, rect)
+    }
+
+    pub fn add_rect_flip(&mut self, mut x: f32, mut y: f32, flip_x: bool, flip_y: bool, rect: &common::Rect<u16>) {
+        if (rect.right - rect.left) == 0 || (rect.bottom - rect.top) == 0 {
+            return;
+        }
+
+        unsafe {
+            x = (x * G_MAG).round() / G_MAG;
+            y = (y * G_MAG).round() / G_MAG;
+        }
+        let mag = unsafe { I_MAG };
+
+        self.batch.add(SpriteBatchCommand::DrawRectFlip(
+            Rect {
+                left: rect.left as f32 / self.scale_x,
+                top: rect.top as f32 / self.scale_y,
+                right: rect.right as f32 / self.scale_x,
+                bottom: rect.bottom as f32 / self.scale_y,
+            },
+            Rect {
+                left: x * mag,
+                top: y * mag,
+                right: (x + rect.width() as f32) * mag,
+                bottom: (y + rect.height() as f32) * mag,
+            },
+            flip_x, flip_y
+        ));
     }
 
     #[inline(always)]
     pub fn add_rect_tinted(&mut self, x: f32, y: f32, color: (u8, u8, u8, u8), rect: &common::Rect<u16>) {
-        self.add_rect_scaled_tinted(x, y, color, self.scale_x, self.scale_y, rect)
+        self.add_rect_scaled_tinted(x, y, color, 1.0, 1.0, rect)
     }
 
     pub fn add_rect_scaled(&mut self, mut x: f32, mut y: f32, scale_x: f32, scale_y: f32, rect: &common::Rect<u16>) {
@@ -90,36 +133,53 @@ impl SizedBatch {
         }
 
         unsafe {
-            x = (x * G_MAG).floor() / G_MAG;
-            y = (y * G_MAG).floor() / G_MAG;
+            x = (x * G_MAG).round() / G_MAG;
+            y = (y * G_MAG).round() / G_MAG;
         }
+        let mag = unsafe { I_MAG };
 
-        let param = DrawParam::new()
-            .src(Rect::new(rect.left as f32 / self.width as f32,
-                           rect.top as f32 / self.height as f32,
-                           (rect.right - rect.left) as f32 / self.width as f32,
-                           (rect.bottom - rect.top) as f32 / self.height as f32))
-            .dest(mint::Point2 { x, y })
-            .scale(Vector2::new(scale_x, scale_y));
-
-        self.batch.add(param);
+        self.batch.add(SpriteBatchCommand::DrawRect(
+            Rect {
+                left: rect.left as f32 / self.scale_x,
+                top: rect.top as f32 / self.scale_y,
+                right: rect.right as f32 / self.scale_x,
+                bottom: rect.bottom as f32 / self.scale_y,
+            },
+            Rect {
+                left: x * mag,
+                top: y * mag,
+                right: (x + rect.width() as f32 * scale_x) * mag,
+                bottom: (y + rect.height() as f32 * scale_y) * mag,
+            },
+        ));
     }
 
-    pub fn add_rect_scaled_tinted(&mut self, x: f32, y: f32, color: (u8, u8, u8, u8), scale_x: f32, scale_y: f32, rect: &common::Rect<u16>) {
+    pub fn add_rect_scaled_tinted(&mut self, mut x: f32, mut y: f32, color: (u8, u8, u8, u8), scale_x: f32, scale_y: f32, rect: &common::Rect<u16>) {
         if (rect.right - rect.left) == 0 || (rect.bottom - rect.top) == 0 {
             return;
         }
 
-        let param = DrawParam::new()
-            .color(color.into())
-            .src(Rect::new(rect.left as f32 / self.width as f32,
-                           rect.top as f32 / self.height as f32,
-                           (rect.right - rect.left) as f32 / self.width as f32,
-                           (rect.bottom - rect.top) as f32 / self.height as f32))
-            .dest(mint::Point2 { x, y })
-            .scale(Vector2::new(scale_x, scale_y));
+        unsafe {
+            x = (x * G_MAG).floor() / G_MAG;
+            y = (y * G_MAG).floor() / G_MAG;
+        }
+        let mag = unsafe { I_MAG };
 
-        self.batch.add(param);
+        self.batch.add(SpriteBatchCommand::DrawRectTinted(
+            Rect {
+                left: rect.left as f32,
+                top: rect.top as f32,
+                right: rect.right as f32,
+                bottom: rect.bottom as f32,
+            },
+            Rect {
+                left: x * mag,
+                top: y * mag,
+                right: (x + rect.width() as f32 * scale_x) * mag,
+                bottom: (y + rect.height() as f32 * scale_y) * mag,
+            },
+            color.into(),
+        ));
     }
 
     #[inline(always)]
@@ -128,8 +188,8 @@ impl SizedBatch {
     }
 
     pub fn draw_filtered(&mut self, filter: FilterMode, ctx: &mut Context) -> GameResult {
-        self.batch.set_filter(filter);
-        self.batch.draw(ctx, DrawParam::new())?;
+        //self.batch.set_filter(filter);
+        self.batch.draw()?;
         self.batch.clear();
         Ok(())
     }
@@ -168,7 +228,7 @@ impl TextureSet {
         }
     }
 
-    fn load_image(&self, ctx: &mut Context, path: &str) -> GameResult<Image> {
+    fn load_image(&self, ctx: &mut Context, path: &str) -> GameResult<Box<dyn BackendTexture>> {
         let img = {
             let mut buf = [0u8; 8];
             let mut reader = filesystem::open(ctx, path)?;
@@ -184,7 +244,7 @@ impl TextureSet {
         };
         let (width, height) = img.dimensions();
 
-        Image::from_rgba8(ctx, width as u16, height as u16, img.as_ref())
+        create_texture(ctx, width as u16, height as u16, &img)
     }
 
     pub fn load_texture(&self, ctx: &mut Context, constants: &EngineConstants, name: &str) -> GameResult<SizedBatch> {
@@ -199,27 +259,25 @@ impl TextureSet {
 
         info!("Loading texture: {}", path);
 
-        let image = self.load_image(ctx, &path)?;
-        let size = image.dimensions();
+        let batch = self.load_image(ctx, &path)?;
+        let size = batch.dimensions();
 
-        assert_ne!(size.w as isize, 0, "size.w == 0");
-        assert_ne!(size.h as isize, 0, "size.h == 0");
+        assert_ne!(size.0 as isize, 0, "size.width == 0");
+        assert_ne!(size.1 as isize, 0, "size.height == 0");
 
-        let dim = (size.w as usize, size.h as usize);
-        let orig_dimensions = constants.tex_sizes.get(name).unwrap_or_else(|| &dim);
-        let scale_x = orig_dimensions.0 as f32 / size.w;
-        let scale_y = orig_dimensions.0 as f32 / size.w;
-        let width = (size.w * scale_x) as usize;
-        let height = (size.h * scale_y) as usize;
+        let orig_dimensions = constants.tex_sizes.get(name).unwrap_or_else(|| &size);
+        let scale = orig_dimensions.0 as f32 / size.0 as f32;
+        let width = (size.0 as f32 * scale) as usize;
+        let height = (size.1 as f32 * scale) as usize;
 
         Ok(SizedBatch {
-            batch: SpriteBatch::new(image),
+            batch,
             width,
             height,
-            scale_x,
-            scale_y,
-            real_width: size.w as usize,
-            real_height: size.h as usize,
+            scale_x: scale,
+            scale_y: scale,
+            real_width: size.0 as usize,
+            real_height: size.1 as usize,
         })
     }
 
@@ -233,14 +291,10 @@ impl TextureSet {
     }
 
     pub fn draw_rect(&self, rect: common::Rect, color: [f32; 4], ctx: &mut Context) -> GameResult {
-        let rect = Mesh::new_rectangle(ctx, DrawMode::fill(), rect.into(), color.into())?;
-        graphics::draw(ctx, &rect, DrawParam::new())?;
         Ok(())
     }
 
     pub fn draw_outline_rect(&self, rect: common::Rect, width: f32, color: [f32; 4], ctx: &mut Context) -> GameResult {
-        let rect = Mesh::new_rectangle(ctx, DrawMode::stroke(width), rect.into(), color.into())?;
-        graphics::draw(ctx, &rect, DrawParam::new())?;
         Ok(())
     }
 }

src/ui.rs

@@ -1,191 +0,0 @@
-use std::time::Instant;
-
-use imgui::{FontConfig, FontSource};
-use imgui::sys::*;
-use imgui_gfx_renderer::{Renderer, Shaders};
-use imgui_gfx_renderer::gfx::format::DepthStencil;
-use imgui_gfx_renderer::gfx::format::Rgba8;
-use imgui_gfx_renderer::gfx::handle::DepthStencilView;
-use imgui_gfx_renderer::gfx::handle::RenderTargetView;
-use imgui_gfx_renderer::gfx::memory::Typed;
-use imgui_winit_support::{HiDpiMode, WinitPlatform};
-
-use ggez::{Context, GameResult, graphics};
-use ggez::GameError::RenderError;
-use crate::live_debugger::LiveDebugger;
-use crate::scene::Scene;
-use crate::shared_game_state::SharedGameState;
-
-mod types {
-    pub type Resources = gfx_device_gl::Resources;
-}
-
-pub struct UI {
-    pub imgui: imgui::Context,
-    pub platform: WinitPlatform,
-    pub renderer: Renderer<Rgba8, types::Resources>,
-    pub components: Components,
-    pub main_color: RenderTargetView<types::Resources, Rgba8>,
-    pub main_depth: DepthStencilView<types::Resources, DepthStencil>,
-    last_frame: Instant,
-}
-
-pub struct Components {
-    pub live_debugger: LiveDebugger,
-}
-
-impl UI {
-    pub fn new(ctx: &mut Context) -> GameResult<Self> {
-        let mut imgui = imgui::Context::create();
-        imgui.set_ini_filename(None);
-        imgui.fonts().add_font(&[
-            FontSource::DefaultFontData {
-                config: Some(FontConfig::default()),
-            },
-        ]);
-
-        imgui.style_mut().window_padding = [4.0, 6.0];
-        imgui.style_mut().frame_padding = [8.0, 6.0];
-        imgui.style_mut().item_spacing = [8.0, 6.0];
-        imgui.style_mut().item_inner_spacing = [8.0, 6.0];
-        imgui.style_mut().indent_spacing = 20.0;
-
-        imgui.style_mut().scrollbar_size = 20.0;
-        imgui.style_mut().grab_min_size = 5.0;
-        imgui.style_mut().window_border_size = 0.0;
-        imgui.style_mut().child_border_size = 1.0;
-        imgui.style_mut().popup_border_size = 1.0;
-        imgui.style_mut().frame_border_size = 1.0;
-        imgui.style_mut().tab_border_size = 0.0;
-
-        imgui.style_mut().window_rounding = 0.0;
-        imgui.style_mut().child_rounding = 0.0;
-        imgui.style_mut().frame_rounding = 0.0;
-        imgui.style_mut().popup_rounding = 0.0;
-        imgui.style_mut().scrollbar_rounding = 0.0;
-        imgui.style_mut().grab_rounding = 0.0;
-        imgui.style_mut().tab_rounding = 0.0;
-
-        imgui.style_mut().window_title_align = [0.50, 0.50];
-        imgui.style_mut().window_rounding = 0.0;
-
-        let colors = &mut imgui.style_mut().colors;
-        colors[ImGuiCol_Text as usize] = [0.90, 0.90, 0.90, 1.00];
-        colors[ImGuiCol_TextDisabled as usize] = [0.50, 0.50, 0.50, 1.00];
-        colors[ImGuiCol_WindowBg as usize] = [0.05, 0.05, 0.05, 0.60];
-        colors[ImGuiCol_ChildBg as usize] = [0.05, 0.05, 0.05, 0.60];
-        colors[ImGuiCol_PopupBg as usize] = [0.00, 0.00, 0.00, 0.60];
-        colors[ImGuiCol_Border as usize] = [0.40, 0.40, 0.40, 1.00];
-        colors[ImGuiCol_BorderShadow as usize] = [1.00, 1.00, 1.00, 0.00];
-        colors[ImGuiCol_FrameBg as usize] = [0.00, 0.00, 0.00, 0.60];
-        colors[ImGuiCol_FrameBgHovered as usize] = [0.84, 0.37, 0.00, 0.20];
-        colors[ImGuiCol_FrameBgActive as usize] = [0.84, 0.37, 0.00, 1.00];
-        colors[ImGuiCol_TitleBg as usize] = [0.06, 0.06, 0.06, 1.00];
-        colors[ImGuiCol_TitleBgActive as usize] = [0.00, 0.00, 0.00, 1.00];
-        colors[ImGuiCol_TitleBgCollapsed as usize] = [0.06, 0.06, 0.06, 0.40];
-        colors[ImGuiCol_MenuBarBg as usize] = [0.14, 0.14, 0.14, 1.00];
-        colors[ImGuiCol_ScrollbarBg as usize] = [0.14, 0.14, 0.14, 0.40];
-        colors[ImGuiCol_ScrollbarGrab as usize] = [0.31, 0.31, 0.31, 0.30];
-        colors[ImGuiCol_ScrollbarGrabHovered as usize] = [1.00, 1.00, 1.00, 0.30];
-        colors[ImGuiCol_ScrollbarGrabActive as usize] = [1.00, 1.00, 1.00, 0.50];
-        colors[ImGuiCol_CheckMark as usize] = [0.90, 0.90, 0.90, 1.00];
-        colors[ImGuiCol_SliderGrab as usize] = [0.31, 0.31, 0.31, 1.00];
-        colors[ImGuiCol_SliderGrabActive as usize] = [1.00, 1.00, 1.00, 0.50];
-        colors[ImGuiCol_Button as usize] = [0.14, 0.14, 0.14, 1.00];
-        colors[ImGuiCol_ButtonHovered as usize] = [0.84, 0.37, 0.00, 0.20];
-        colors[ImGuiCol_ButtonActive as usize] = [0.84, 0.37, 0.00, 1.00];
-        colors[ImGuiCol_Header as usize] = [0.14, 0.14, 0.14, 1.00];
-        colors[ImGuiCol_HeaderHovered as usize] = [0.84, 0.37, 0.00, 0.20];
-        colors[ImGuiCol_HeaderActive as usize] = [0.84, 0.37, 0.00, 1.00];
-        colors[ImGuiCol_Separator as usize] = [0.50, 0.50, 0.43, 0.50];
-        colors[ImGuiCol_SeparatorHovered as usize] = [0.75, 0.45, 0.10, 0.78];
-        colors[ImGuiCol_SeparatorActive as usize] = [0.75, 0.45, 0.10, 1.00];
-        colors[ImGuiCol_ResizeGrip as usize] = [0.98, 0.65, 0.26, 0.25];
-        colors[ImGuiCol_ResizeGripHovered as usize] = [0.98, 0.65, 0.26, 0.67];
-        colors[ImGuiCol_ResizeGripActive as usize] = [0.98, 0.65, 0.26, 0.95];
-        colors[ImGuiCol_Tab as usize] = [0.17, 0.10, 0.04, 0.94];
-        colors[ImGuiCol_TabHovered as usize] = [0.84, 0.37, 0.00, 0.60];
-        colors[ImGuiCol_TabActive as usize] = [0.67, 0.30, 0.00, 0.68];
-        colors[ImGuiCol_TabUnfocused as usize] = [0.06, 0.05, 0.05, 0.69];
-        colors[ImGuiCol_TabUnfocusedActive as usize] = [0.36, 0.17, 0.03, 0.64];
-        colors[ImGuiCol_PlotLines as usize] = [0.39, 0.39, 0.39, 1.00];
-        colors[ImGuiCol_PlotLinesHovered as usize] = [0.35, 0.92, 1.00, 1.00];
-        colors[ImGuiCol_PlotHistogram as usize] = [0.00, 0.20, 0.90, 1.00];
-        colors[ImGuiCol_PlotHistogramHovered as usize] = [0.00, 0.40, 1.00, 1.00];
-        colors[ImGuiCol_TextSelectedBg as usize] = [0.98, 0.65, 0.26, 0.35];
-        colors[ImGuiCol_DragDropTarget as usize] = [0.00, 0.00, 1.00, 0.90];
-        colors[ImGuiCol_NavHighlight as usize] = [0.98, 0.65, 0.26, 1.00];
-        colors[ImGuiCol_NavWindowingHighlight as usize] = [0.00, 0.00, 0.00, 0.70];
-        colors[ImGuiCol_NavWindowingDimBg as usize] = [0.20, 0.20, 0.20, 0.20];
-        colors[ImGuiCol_ModalWindowDimBg as usize] = [0.20, 0.20, 0.20, 0.35];
-
-        let mut platform = WinitPlatform::init(&mut imgui);
-        platform.attach_window(imgui.io_mut(), graphics::window(ctx).window(), HiDpiMode::Rounded);
-
-        let (factory, dev, _, depth, color) = graphics::gfx_objects(ctx);
-        let shaders = {
-            let version = dev.get_info().shading_language;
-            if version.is_embedded {
-                if version.major >= 3 {
-                    Shaders::GlSlEs300
-                } else {
-                    Shaders::GlSlEs100
-                }
-            } else if version.major >= 4 {
-                Shaders::GlSl400
-            } else if version.major >= 3 {
-                if version.minor >= 2 {
-                    Shaders::GlSl150
-                } else {
-                    Shaders::GlSl130
-                }
-            } else {
-                Shaders::GlSl110
-            }
-        };
-        let renderer = Renderer::init(&mut imgui, factory, shaders)
-            .map_err(|e| RenderError(e.to_string()))?;
-
-        Ok(Self {
-            imgui,
-            platform,
-            renderer,
-            components: Components {
-                live_debugger: LiveDebugger::new(),
-            },
-            main_color: RenderTargetView::new(color),
-            main_depth: DepthStencilView::new(depth),
-            last_frame: Instant::now(),
-        })
-    }
-
-    pub fn handle_events(&mut self, ctx: &mut Context, event: &winit::event::Event<()>) {
-        self.platform.handle_event(self.imgui.io_mut(), graphics::window(ctx).window(), &event);
-    }
-
-    pub fn draw(&mut self, state: &mut SharedGameState, ctx: &mut Context, scene: &mut Box<dyn Scene>) -> GameResult {
-        {
-            let io = self.imgui.io_mut();
-            self.platform.prepare_frame(io, graphics::window(ctx).window())
-                .map_err(|e| RenderError(e.to_string()))?;
-
-            let now = Instant::now();
-            io.update_delta_time(now - self.last_frame);
-            self.last_frame = now;
-        }
-        let mut ui = self.imgui.frame();
-
-        scene.debug_overlay_draw(&mut self.components, state, ctx, &mut ui)?;
-
-        self.platform.prepare_render(&ui, graphics::window(ctx).window());
-        let draw_data = ui.render();
-        let (factory, dev, encoder, _, _) = graphics::gfx_objects(ctx);
-        self.renderer
-            .render(factory, encoder, &mut self.main_color, draw_data)
-            .map_err(|e| RenderError(e.to_string()))?;
-
-        encoder.flush(dev);
-
-        Ok(())
-    }
-}

src/weapon.rs

@@ -384,7 +384,7 @@ impl Weapon {
 
     fn tick_spur(&mut self, player: &mut Player, player_id: TargetPlayer, inventory: &mut Inventory, bullet_manager: &mut BulletManager, state: &mut SharedGameState) {
         let mut shoot = false;
-        let mut btype = 0;
+        let mut btype;
 
         if player.controller.shoot() {
             inventory.add_xp(if player.equip.has_turbocharge() { 3 } else { 2 }, player, state);
@@ -443,8 +443,8 @@ impl Weapon {
             WeaponLevel::None => unreachable!(),
         }
 
-        const bullets: [u16; 6] = [44, 45, 46, 47, 48, 49];
-        if bullet_manager.count_bullets_multi(&bullets, player_id) == 0
+        const BULLETS: [u16; 6] = [44, 45, 46, 47, 48, 49];
+        if bullet_manager.count_bullets_multi(&BULLETS, player_id) == 0
             && (player.controller.trigger_shoot() || shoot) {
             if !self.consume_ammo(1) {
                 state.sound_manager.play_sfx(37);