mirror of https://git.h3cjp.net/H3cJP/citra.git
1784 lines
72 KiB
C++
1784 lines
72 KiB
C++
// Copyright 2022 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <string_view>
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#include <fmt/format.h>
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#include "common/bit_set.h"
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#include "common/logging/log.h"
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#include "core/core.h"
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#include "video_core/pica_state.h"
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#include "video_core/renderer_opengl/gl_shader_decompiler.h"
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#include "video_core/renderer_opengl/gl_shader_gen.h"
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#include "video_core/renderer_opengl/gl_shader_util.h"
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#include "video_core/renderer_opengl/gl_vars.h"
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#include "video_core/shader/shader_uniforms.h"
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#include "video_core/video_core.h"
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using Pica::FramebufferRegs;
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using Pica::LightingRegs;
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using Pica::RasterizerRegs;
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using Pica::TexturingRegs;
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using TevStageConfig = TexturingRegs::TevStageConfig;
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using VSOutputAttributes = RasterizerRegs::VSOutputAttributes;
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namespace OpenGL {
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const std::string UniformBlockDef = Pica::Shader::BuildShaderUniformDefinitions();
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static std::string GetVertexInterfaceDeclaration(bool is_output, bool separable_shader) {
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std::string out;
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const auto append_variable = [&](std::string_view var, int location) {
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if (separable_shader) {
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out += fmt::format("layout (location={}) ", location);
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}
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out += fmt::format("{}{};\n", is_output ? "out " : "in ", var);
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};
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append_variable("vec4 primary_color", ATTRIBUTE_COLOR);
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append_variable("vec2 texcoord0", ATTRIBUTE_TEXCOORD0);
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append_variable("vec2 texcoord1", ATTRIBUTE_TEXCOORD1);
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append_variable("vec2 texcoord2", ATTRIBUTE_TEXCOORD2);
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append_variable("float texcoord0_w", ATTRIBUTE_TEXCOORD0_W);
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append_variable("vec4 normquat", ATTRIBUTE_NORMQUAT);
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append_variable("vec3 view", ATTRIBUTE_VIEW);
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if (is_output && separable_shader) {
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// gl_PerVertex redeclaration is required for separate shader object
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out += R"(
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out gl_PerVertex {
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vec4 gl_Position;
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#if !defined(CITRA_GLES) || defined(GL_EXT_clip_cull_distance)
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float gl_ClipDistance[2];
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#endif // !defined(CITRA_GLES) || defined(GL_EXT_clip_cull_distance)
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};
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)";
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}
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return out;
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}
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PicaFSConfig PicaFSConfig::BuildFromRegs(const Pica::Regs& regs, bool use_normal) {
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PicaFSConfig res{};
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auto& state = res.state;
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state.scissor_test_mode = regs.rasterizer.scissor_test.mode;
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state.depthmap_enable = regs.rasterizer.depthmap_enable;
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state.alpha_test_func = regs.framebuffer.output_merger.alpha_test.enable
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? regs.framebuffer.output_merger.alpha_test.func.Value()
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: FramebufferRegs::CompareFunc::Always;
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state.texture0_type = regs.texturing.texture0.type;
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state.texture2_use_coord1 = regs.texturing.main_config.texture2_use_coord1 != 0;
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if (GLES) {
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// With GLES, we need this in the fragment shader to emulate logic operations
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state.alphablend_enable =
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Pica::g_state.regs.framebuffer.output_merger.alphablend_enable == 1;
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state.logic_op = regs.framebuffer.output_merger.logic_op;
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} else {
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// We don't need these otherwise, reset them to avoid unnecessary shader generation
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state.alphablend_enable = {};
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state.logic_op = {};
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}
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// Copy relevant tev stages fields.
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// We don't sync const_color here because of the high variance, it is a
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// shader uniform instead.
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const auto& tev_stages = regs.texturing.GetTevStages();
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DEBUG_ASSERT(state.tev_stages.size() == tev_stages.size());
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for (std::size_t i = 0; i < tev_stages.size(); i++) {
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const auto& tev_stage = tev_stages[i];
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state.tev_stages[i].sources_raw = tev_stage.sources_raw;
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state.tev_stages[i].modifiers_raw = tev_stage.modifiers_raw;
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state.tev_stages[i].ops_raw = tev_stage.ops_raw;
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state.tev_stages[i].scales_raw = tev_stage.scales_raw;
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}
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state.fog_mode = regs.texturing.fog_mode;
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state.fog_flip = regs.texturing.fog_flip != 0;
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state.combiner_buffer_input = regs.texturing.tev_combiner_buffer_input.update_mask_rgb.Value() |
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regs.texturing.tev_combiner_buffer_input.update_mask_a.Value()
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<< 4;
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// Fragment lighting
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state.lighting.enable = !regs.lighting.disable;
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state.lighting.src_num = regs.lighting.max_light_index + 1;
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for (unsigned light_index = 0; light_index < state.lighting.src_num; ++light_index) {
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unsigned num = regs.lighting.light_enable.GetNum(light_index);
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const auto& light = regs.lighting.light[num];
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state.lighting.light[light_index].num = num;
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state.lighting.light[light_index].directional = light.config.directional != 0;
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state.lighting.light[light_index].two_sided_diffuse = light.config.two_sided_diffuse != 0;
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state.lighting.light[light_index].geometric_factor_0 = light.config.geometric_factor_0 != 0;
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state.lighting.light[light_index].geometric_factor_1 = light.config.geometric_factor_1 != 0;
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state.lighting.light[light_index].dist_atten_enable =
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!regs.lighting.IsDistAttenDisabled(num);
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state.lighting.light[light_index].spot_atten_enable =
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!regs.lighting.IsSpotAttenDisabled(num);
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state.lighting.light[light_index].shadow_enable = !regs.lighting.IsShadowDisabled(num);
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}
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state.lighting.lut_d0.enable = regs.lighting.config1.disable_lut_d0 == 0;
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state.lighting.lut_d0.abs_input = regs.lighting.abs_lut_input.disable_d0 == 0;
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state.lighting.lut_d0.type = regs.lighting.lut_input.d0.Value();
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state.lighting.lut_d0.scale = regs.lighting.lut_scale.GetScale(regs.lighting.lut_scale.d0);
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state.lighting.lut_d1.enable = regs.lighting.config1.disable_lut_d1 == 0;
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state.lighting.lut_d1.abs_input = regs.lighting.abs_lut_input.disable_d1 == 0;
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state.lighting.lut_d1.type = regs.lighting.lut_input.d1.Value();
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state.lighting.lut_d1.scale = regs.lighting.lut_scale.GetScale(regs.lighting.lut_scale.d1);
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// this is a dummy field due to lack of the corresponding register
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state.lighting.lut_sp.enable = true;
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state.lighting.lut_sp.abs_input = regs.lighting.abs_lut_input.disable_sp == 0;
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state.lighting.lut_sp.type = regs.lighting.lut_input.sp.Value();
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state.lighting.lut_sp.scale = regs.lighting.lut_scale.GetScale(regs.lighting.lut_scale.sp);
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state.lighting.lut_fr.enable = regs.lighting.config1.disable_lut_fr == 0;
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state.lighting.lut_fr.abs_input = regs.lighting.abs_lut_input.disable_fr == 0;
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state.lighting.lut_fr.type = regs.lighting.lut_input.fr.Value();
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state.lighting.lut_fr.scale = regs.lighting.lut_scale.GetScale(regs.lighting.lut_scale.fr);
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state.lighting.lut_rr.enable = regs.lighting.config1.disable_lut_rr == 0;
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state.lighting.lut_rr.abs_input = regs.lighting.abs_lut_input.disable_rr == 0;
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state.lighting.lut_rr.type = regs.lighting.lut_input.rr.Value();
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state.lighting.lut_rr.scale = regs.lighting.lut_scale.GetScale(regs.lighting.lut_scale.rr);
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state.lighting.lut_rg.enable = regs.lighting.config1.disable_lut_rg == 0;
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state.lighting.lut_rg.abs_input = regs.lighting.abs_lut_input.disable_rg == 0;
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state.lighting.lut_rg.type = regs.lighting.lut_input.rg.Value();
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state.lighting.lut_rg.scale = regs.lighting.lut_scale.GetScale(regs.lighting.lut_scale.rg);
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state.lighting.lut_rb.enable = regs.lighting.config1.disable_lut_rb == 0;
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state.lighting.lut_rb.abs_input = regs.lighting.abs_lut_input.disable_rb == 0;
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state.lighting.lut_rb.type = regs.lighting.lut_input.rb.Value();
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state.lighting.lut_rb.scale = regs.lighting.lut_scale.GetScale(regs.lighting.lut_scale.rb);
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state.lighting.config = regs.lighting.config0.config;
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state.lighting.enable_primary_alpha = regs.lighting.config0.enable_primary_alpha;
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state.lighting.enable_secondary_alpha = regs.lighting.config0.enable_secondary_alpha;
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state.lighting.bump_mode = regs.lighting.config0.bump_mode;
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state.lighting.bump_selector = regs.lighting.config0.bump_selector;
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state.lighting.bump_renorm = regs.lighting.config0.disable_bump_renorm == 0;
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state.lighting.clamp_highlights = regs.lighting.config0.clamp_highlights != 0;
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state.lighting.enable_shadow = regs.lighting.config0.enable_shadow != 0;
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state.lighting.shadow_primary = regs.lighting.config0.shadow_primary != 0;
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state.lighting.shadow_secondary = regs.lighting.config0.shadow_secondary != 0;
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state.lighting.shadow_invert = regs.lighting.config0.shadow_invert != 0;
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state.lighting.shadow_alpha = regs.lighting.config0.shadow_alpha != 0;
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state.lighting.shadow_selector = regs.lighting.config0.shadow_selector;
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state.proctex.enable = regs.texturing.main_config.texture3_enable;
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if (state.proctex.enable) {
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state.proctex.coord = regs.texturing.main_config.texture3_coordinates;
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state.proctex.u_clamp = regs.texturing.proctex.u_clamp;
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state.proctex.v_clamp = regs.texturing.proctex.v_clamp;
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state.proctex.color_combiner = regs.texturing.proctex.color_combiner;
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state.proctex.alpha_combiner = regs.texturing.proctex.alpha_combiner;
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state.proctex.separate_alpha = regs.texturing.proctex.separate_alpha;
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state.proctex.noise_enable = regs.texturing.proctex.noise_enable;
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state.proctex.u_shift = regs.texturing.proctex.u_shift;
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state.proctex.v_shift = regs.texturing.proctex.v_shift;
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state.proctex.lut_width = regs.texturing.proctex_lut.width;
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state.proctex.lut_offset0 = regs.texturing.proctex_lut_offset.level0;
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state.proctex.lut_offset1 = regs.texturing.proctex_lut_offset.level1;
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state.proctex.lut_offset2 = regs.texturing.proctex_lut_offset.level2;
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state.proctex.lut_offset3 = regs.texturing.proctex_lut_offset.level3;
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state.proctex.lod_min = regs.texturing.proctex_lut.lod_min;
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state.proctex.lod_max = regs.texturing.proctex_lut.lod_max;
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state.proctex.lut_filter = regs.texturing.proctex_lut.filter;
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}
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state.shadow_rendering = regs.framebuffer.output_merger.fragment_operation_mode ==
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FramebufferRegs::FragmentOperationMode::Shadow;
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state.shadow_texture_orthographic = regs.texturing.shadow.orthographic != 0;
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state.use_custom_normal_map = use_normal;
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return res;
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}
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void PicaShaderConfigCommon::Init(const Pica::ShaderRegs& regs, Pica::Shader::ShaderSetup& setup) {
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program_hash = setup.GetProgramCodeHash();
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swizzle_hash = setup.GetSwizzleDataHash();
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main_offset = regs.main_offset;
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sanitize_mul = VideoCore::g_hw_shader_accurate_mul;
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num_outputs = 0;
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output_map.fill(16);
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for (int reg : Common::BitSet<u32>(regs.output_mask)) {
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output_map[reg] = num_outputs++;
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}
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}
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void PicaGSConfigCommonRaw::Init(const Pica::Regs& regs) {
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vs_output_attributes = Common::BitSet<u32>(regs.vs.output_mask).Count();
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gs_output_attributes = vs_output_attributes;
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semantic_maps.fill({16, 0});
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for (u32 attrib = 0; attrib < regs.rasterizer.vs_output_total; ++attrib) {
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const std::array semantics{
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regs.rasterizer.vs_output_attributes[attrib].map_x.Value(),
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regs.rasterizer.vs_output_attributes[attrib].map_y.Value(),
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regs.rasterizer.vs_output_attributes[attrib].map_z.Value(),
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regs.rasterizer.vs_output_attributes[attrib].map_w.Value(),
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};
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for (u32 comp = 0; comp < 4; ++comp) {
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const auto semantic = semantics[comp];
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if (static_cast<std::size_t>(semantic) < 24) {
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semantic_maps[static_cast<std::size_t>(semantic)] = {attrib, comp};
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} else if (semantic != VSOutputAttributes::INVALID) {
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LOG_ERROR(Render_OpenGL, "Invalid/unknown semantic id: {}", semantic);
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}
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}
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}
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}
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/// Detects if a TEV stage is configured to be skipped (to avoid generating unnecessary code)
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static bool IsPassThroughTevStage(const TevStageConfig& stage) {
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return (stage.color_op == TevStageConfig::Operation::Replace &&
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stage.alpha_op == TevStageConfig::Operation::Replace &&
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stage.color_source1 == TevStageConfig::Source::Previous &&
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stage.alpha_source1 == TevStageConfig::Source::Previous &&
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stage.color_modifier1 == TevStageConfig::ColorModifier::SourceColor &&
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stage.alpha_modifier1 == TevStageConfig::AlphaModifier::SourceAlpha &&
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stage.GetColorMultiplier() == 1 && stage.GetAlphaMultiplier() == 1);
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}
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static std::string SampleTexture(const PicaFSConfig& config, unsigned texture_unit) {
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const auto& state = config.state;
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switch (texture_unit) {
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case 0:
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// Only unit 0 respects the texturing type
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switch (state.texture0_type) {
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case TexturingRegs::TextureConfig::Texture2D:
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return "textureLod(tex0, texcoord0, getLod(texcoord0 * vec2(textureSize(tex0, 0))) + "
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"tex_lod_bias[0])";
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case TexturingRegs::TextureConfig::Projection2D:
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// TODO (wwylele): find the exact LOD formula for projection texture
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return "textureProj(tex0, vec3(texcoord0, texcoord0_w))";
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case TexturingRegs::TextureConfig::TextureCube:
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return "texture(tex_cube, vec3(texcoord0, texcoord0_w))";
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case TexturingRegs::TextureConfig::Shadow2D:
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return "shadowTexture(texcoord0, texcoord0_w)";
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case TexturingRegs::TextureConfig::ShadowCube:
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return "shadowTextureCube(texcoord0, texcoord0_w)";
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case TexturingRegs::TextureConfig::Disabled:
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return "vec4(0.0)";
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default:
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LOG_CRITICAL(HW_GPU, "Unhandled texture type {:x}", state.texture0_type);
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UNIMPLEMENTED();
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return "texture(tex0, texcoord0)";
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}
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case 1:
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return "textureLod(tex1, texcoord1, getLod(texcoord1 * vec2(textureSize(tex1, 0))) + "
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"tex_lod_bias[1])";
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case 2:
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if (state.texture2_use_coord1)
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return "textureLod(tex2, texcoord1, getLod(texcoord1 * vec2(textureSize(tex2, 0))) + "
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"tex_lod_bias[2])";
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else
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return "textureLod(tex2, texcoord2, getLod(texcoord2 * vec2(textureSize(tex2, 0))) + "
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"tex_lod_bias[2])";
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case 3:
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if (state.proctex.enable) {
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return "ProcTex()";
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} else {
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LOG_DEBUG(Render_OpenGL, "Using Texture3 without enabling it");
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return "vec4(0.0)";
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}
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case 4:
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return "texture(tex_normal, texcoord0)";
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default:
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UNREACHABLE();
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return "";
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}
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}
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/// Writes the specified TEV stage source component(s)
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static void AppendSource(std::string& out, const PicaFSConfig& config,
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TevStageConfig::Source source, std::string_view index_name) {
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using Source = TevStageConfig::Source;
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switch (source) {
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case Source::PrimaryColor:
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out += "rounded_primary_color";
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break;
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case Source::PrimaryFragmentColor:
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out += "primary_fragment_color";
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break;
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case Source::SecondaryFragmentColor:
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out += "secondary_fragment_color";
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break;
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case Source::Texture0:
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out += SampleTexture(config, 0);
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break;
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case Source::Texture1:
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out += SampleTexture(config, 1);
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break;
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case Source::Texture2:
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out += SampleTexture(config, 2);
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break;
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case Source::Texture3:
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out += SampleTexture(config, 3);
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break;
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case Source::PreviousBuffer:
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out += "combiner_buffer";
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break;
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case Source::Constant:
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out += "const_color[";
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out += index_name;
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out += ']';
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break;
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case Source::Previous:
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out += "last_tex_env_out";
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break;
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default:
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out += "vec4(0.0)";
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LOG_CRITICAL(Render_OpenGL, "Unknown source op {}", source);
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break;
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}
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}
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/// Writes the color components to use for the specified TEV stage color modifier
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static void AppendColorModifier(std::string& out, const PicaFSConfig& config,
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TevStageConfig::ColorModifier modifier,
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TevStageConfig::Source source, std::string_view index_name) {
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using ColorModifier = TevStageConfig::ColorModifier;
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switch (modifier) {
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case ColorModifier::SourceColor:
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AppendSource(out, config, source, index_name);
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out += ".rgb";
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break;
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case ColorModifier::OneMinusSourceColor:
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out += "vec3(1.0) - ";
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AppendSource(out, config, source, index_name);
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out += ".rgb";
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break;
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case ColorModifier::SourceAlpha:
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AppendSource(out, config, source, index_name);
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out += ".aaa";
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break;
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case ColorModifier::OneMinusSourceAlpha:
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out += "vec3(1.0) - ";
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AppendSource(out, config, source, index_name);
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out += ".aaa";
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break;
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case ColorModifier::SourceRed:
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AppendSource(out, config, source, index_name);
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out += ".rrr";
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break;
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case ColorModifier::OneMinusSourceRed:
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out += "vec3(1.0) - ";
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AppendSource(out, config, source, index_name);
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out += ".rrr";
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break;
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case ColorModifier::SourceGreen:
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AppendSource(out, config, source, index_name);
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out += ".ggg";
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break;
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case ColorModifier::OneMinusSourceGreen:
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out += "vec3(1.0) - ";
|
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AppendSource(out, config, source, index_name);
|
|
out += ".ggg";
|
|
break;
|
|
case ColorModifier::SourceBlue:
|
|
AppendSource(out, config, source, index_name);
|
|
out += ".bbb";
|
|
break;
|
|
case ColorModifier::OneMinusSourceBlue:
|
|
out += "vec3(1.0) - ";
|
|
AppendSource(out, config, source, index_name);
|
|
out += ".bbb";
|
|
break;
|
|
default:
|
|
out += "vec3(0.0)";
|
|
LOG_CRITICAL(Render_OpenGL, "Unknown color modifier op {}", modifier);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/// Writes the alpha component to use for the specified TEV stage alpha modifier
|
|
static void AppendAlphaModifier(std::string& out, const PicaFSConfig& config,
|
|
TevStageConfig::AlphaModifier modifier,
|
|
TevStageConfig::Source source, const std::string& index_name) {
|
|
using AlphaModifier = TevStageConfig::AlphaModifier;
|
|
switch (modifier) {
|
|
case AlphaModifier::SourceAlpha:
|
|
AppendSource(out, config, source, index_name);
|
|
out += ".a";
|
|
break;
|
|
case AlphaModifier::OneMinusSourceAlpha:
|
|
out += "1.0 - ";
|
|
AppendSource(out, config, source, index_name);
|
|
out += ".a";
|
|
break;
|
|
case AlphaModifier::SourceRed:
|
|
AppendSource(out, config, source, index_name);
|
|
out += ".r";
|
|
break;
|
|
case AlphaModifier::OneMinusSourceRed:
|
|
out += "1.0 - ";
|
|
AppendSource(out, config, source, index_name);
|
|
out += ".r";
|
|
break;
|
|
case AlphaModifier::SourceGreen:
|
|
AppendSource(out, config, source, index_name);
|
|
out += ".g";
|
|
break;
|
|
case AlphaModifier::OneMinusSourceGreen:
|
|
out += "1.0 - ";
|
|
AppendSource(out, config, source, index_name);
|
|
out += ".g";
|
|
break;
|
|
case AlphaModifier::SourceBlue:
|
|
AppendSource(out, config, source, index_name);
|
|
out += ".b";
|
|
break;
|
|
case AlphaModifier::OneMinusSourceBlue:
|
|
out += "1.0 - ";
|
|
AppendSource(out, config, source, index_name);
|
|
out += ".b";
|
|
break;
|
|
default:
|
|
out += "0.0";
|
|
LOG_CRITICAL(Render_OpenGL, "Unknown alpha modifier op {}", modifier);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/// Writes the combiner function for the color components for the specified TEV stage operation
|
|
static void AppendColorCombiner(std::string& out, TevStageConfig::Operation operation,
|
|
std::string_view variable_name) {
|
|
out += "clamp(";
|
|
using Operation = TevStageConfig::Operation;
|
|
switch (operation) {
|
|
case Operation::Replace:
|
|
out += fmt::format("{}[0]", variable_name);
|
|
break;
|
|
case Operation::Modulate:
|
|
out += fmt::format("{0}[0] * {0}[1]", variable_name);
|
|
break;
|
|
case Operation::Add:
|
|
out += fmt::format("{0}[0] + {0}[1]", variable_name);
|
|
break;
|
|
case Operation::AddSigned:
|
|
out += fmt::format("{0}[0] + {0}[1] - vec3(0.5)", variable_name);
|
|
break;
|
|
case Operation::Lerp:
|
|
out += fmt::format("{0}[0] * {0}[2] + {0}[1] * (vec3(1.0) - {0}[2])", variable_name);
|
|
break;
|
|
case Operation::Subtract:
|
|
out += fmt::format("{0}[0] - {0}[1]", variable_name);
|
|
break;
|
|
case Operation::MultiplyThenAdd:
|
|
out += fmt::format("{0}[0] * {0}[1] + {0}[2]", variable_name);
|
|
break;
|
|
case Operation::AddThenMultiply:
|
|
out += fmt::format("min({0}[0] + {0}[1], vec3(1.0)) * {0}[2]", variable_name);
|
|
break;
|
|
case Operation::Dot3_RGB:
|
|
case Operation::Dot3_RGBA:
|
|
out +=
|
|
fmt::format("vec3(dot({0}[0] - vec3(0.5), {0}[1] - vec3(0.5)) * 4.0)", variable_name);
|
|
break;
|
|
default:
|
|
out += "vec3(0.0)";
|
|
LOG_CRITICAL(Render_OpenGL, "Unknown color combiner operation: {}", operation);
|
|
break;
|
|
}
|
|
out += ", vec3(0.0), vec3(1.0))"; // Clamp result to 0.0, 1.0
|
|
}
|
|
|
|
/// Writes the combiner function for the alpha component for the specified TEV stage operation
|
|
static void AppendAlphaCombiner(std::string& out, TevStageConfig::Operation operation,
|
|
std::string_view variable_name) {
|
|
out += "clamp(";
|
|
using Operation = TevStageConfig::Operation;
|
|
switch (operation) {
|
|
case Operation::Replace:
|
|
out += fmt::format("{}[0]", variable_name);
|
|
break;
|
|
case Operation::Modulate:
|
|
out += fmt::format("{0}[0] * {0}[1]", variable_name);
|
|
break;
|
|
case Operation::Add:
|
|
out += fmt::format("{0}[0] + {0}[1]", variable_name);
|
|
break;
|
|
case Operation::AddSigned:
|
|
out += fmt::format("{0}[0] + {0}[1] - 0.5", variable_name);
|
|
break;
|
|
case Operation::Lerp:
|
|
out += fmt::format("{0}[0] * {0}[2] + {0}[1] * (1.0 - {0}[2])", variable_name);
|
|
break;
|
|
case Operation::Subtract:
|
|
out += fmt::format("{0}[0] - {0}[1]", variable_name);
|
|
break;
|
|
case Operation::MultiplyThenAdd:
|
|
out += fmt::format("{0}[0] * {0}[1] + {0}[2]", variable_name);
|
|
break;
|
|
case Operation::AddThenMultiply:
|
|
out += fmt::format("min({0}[0] + {0}[1], 1.0) * {0}[2]", variable_name);
|
|
break;
|
|
default:
|
|
out += "0.0";
|
|
LOG_CRITICAL(Render_OpenGL, "Unknown alpha combiner operation: {}", operation);
|
|
break;
|
|
}
|
|
out += ", 0.0, 1.0)";
|
|
}
|
|
|
|
/// Writes the if-statement condition used to evaluate alpha testing
|
|
static void AppendAlphaTestCondition(std::string& out, FramebufferRegs::CompareFunc func) {
|
|
using CompareFunc = FramebufferRegs::CompareFunc;
|
|
switch (func) {
|
|
case CompareFunc::Never:
|
|
out += "true";
|
|
break;
|
|
case CompareFunc::Always:
|
|
out += "false";
|
|
break;
|
|
case CompareFunc::Equal:
|
|
case CompareFunc::NotEqual:
|
|
case CompareFunc::LessThan:
|
|
case CompareFunc::LessThanOrEqual:
|
|
case CompareFunc::GreaterThan:
|
|
case CompareFunc::GreaterThanOrEqual: {
|
|
static constexpr std::array op{"!=", "==", ">=", ">", "<=", "<"};
|
|
const auto index = static_cast<u32>(func) - static_cast<u32>(CompareFunc::Equal);
|
|
out += fmt::format("int(last_tex_env_out.a * 255.0) {} alphatest_ref", op[index]);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
out += "false";
|
|
LOG_CRITICAL(Render_OpenGL, "Unknown alpha test condition {}", func);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/// Writes the code to emulate the specified TEV stage
|
|
static void WriteTevStage(std::string& out, const PicaFSConfig& config, unsigned index) {
|
|
const auto stage =
|
|
static_cast<const TexturingRegs::TevStageConfig>(config.state.tev_stages[index]);
|
|
if (!IsPassThroughTevStage(stage)) {
|
|
const std::string index_name = std::to_string(index);
|
|
|
|
out += fmt::format("vec3 color_results_{}_1 = ", index_name);
|
|
AppendColorModifier(out, config, stage.color_modifier1, stage.color_source1, index_name);
|
|
out += fmt::format(";\nvec3 color_results_{}_2 = ", index_name);
|
|
AppendColorModifier(out, config, stage.color_modifier2, stage.color_source2, index_name);
|
|
out += fmt::format(";\nvec3 color_results_{}_3 = ", index_name);
|
|
AppendColorModifier(out, config, stage.color_modifier3, stage.color_source3, index_name);
|
|
out += fmt::format(";\nvec3 color_results_{}[3] = vec3[3](color_results_{}_1, "
|
|
"color_results_{}_2, color_results_{}_3);\n",
|
|
index_name, index_name, index_name, index_name);
|
|
|
|
// Round the output of each TEV stage to maintain the PICA's 8 bits of precision
|
|
out += fmt::format("vec3 color_output_{} = byteround(", index_name);
|
|
AppendColorCombiner(out, stage.color_op, "color_results_" + index_name);
|
|
out += ");\n";
|
|
|
|
if (stage.color_op == TevStageConfig::Operation::Dot3_RGBA) {
|
|
// result of Dot3_RGBA operation is also placed to the alpha component
|
|
out += fmt::format("float alpha_output_{0} = color_output_{0}[0];\n", index_name);
|
|
} else {
|
|
out += fmt::format("float alpha_results_{}[3] = float[3](", index_name);
|
|
AppendAlphaModifier(out, config, stage.alpha_modifier1, stage.alpha_source1,
|
|
index_name);
|
|
out += ", ";
|
|
AppendAlphaModifier(out, config, stage.alpha_modifier2, stage.alpha_source2,
|
|
index_name);
|
|
out += ", ";
|
|
AppendAlphaModifier(out, config, stage.alpha_modifier3, stage.alpha_source3,
|
|
index_name);
|
|
out += ");\n";
|
|
|
|
out += fmt::format("float alpha_output_{} = byteround(", index_name);
|
|
AppendAlphaCombiner(out, stage.alpha_op, "alpha_results_" + index_name);
|
|
out += ");\n";
|
|
}
|
|
|
|
out += fmt::format("last_tex_env_out = vec4("
|
|
"clamp(color_output_{} * {}.0, vec3(0.0), vec3(1.0)), "
|
|
"clamp(alpha_output_{} * {}.0, 0.0, 1.0));\n",
|
|
index_name, stage.GetColorMultiplier(), index_name,
|
|
stage.GetAlphaMultiplier());
|
|
}
|
|
|
|
out += "combiner_buffer = next_combiner_buffer;\n";
|
|
|
|
if (config.TevStageUpdatesCombinerBufferColor(index))
|
|
out += "next_combiner_buffer.rgb = last_tex_env_out.rgb;\n";
|
|
|
|
if (config.TevStageUpdatesCombinerBufferAlpha(index))
|
|
out += "next_combiner_buffer.a = last_tex_env_out.a;\n";
|
|
}
|
|
|
|
/// Writes the code to emulate fragment lighting
|
|
static void WriteLighting(std::string& out, const PicaFSConfig& config) {
|
|
const auto& lighting = config.state.lighting;
|
|
|
|
// Define lighting globals
|
|
out += "vec4 diffuse_sum = vec4(0.0, 0.0, 0.0, 1.0);\n"
|
|
"vec4 specular_sum = vec4(0.0, 0.0, 0.0, 1.0);\n"
|
|
"vec3 light_vector = vec3(0.0);\n"
|
|
"float light_distance = 0.0;\n"
|
|
"vec3 refl_value = vec3(0.0);\n"
|
|
"vec3 spot_dir = vec3(0.0);\n"
|
|
"vec3 half_vector = vec3(0.0);\n"
|
|
"float dot_product = 0.0;\n"
|
|
"float clamp_highlights = 1.0;\n"
|
|
"float geo_factor = 1.0;\n";
|
|
|
|
// Compute fragment normals and tangents
|
|
const auto Perturbation = [&] {
|
|
return fmt::format("2.0 * ({}).rgb - 1.0", SampleTexture(config, lighting.bump_selector));
|
|
};
|
|
if (config.state.use_custom_normal_map) {
|
|
const std::string normal_texel =
|
|
fmt::format("2.0 * ({}).rgb - 1.0", SampleTexture(config, 4));
|
|
out += fmt::format("vec3 surface_normal = {};\n", normal_texel);
|
|
out += "vec3 surface_tangent = vec3(1.0, 0.0, 0.0);\n";
|
|
} else if (lighting.bump_mode == LightingRegs::LightingBumpMode::NormalMap) {
|
|
// Bump mapping is enabled using a normal map
|
|
out += fmt::format("vec3 surface_normal = {};\n", Perturbation());
|
|
|
|
// Recompute Z-component of perturbation if 'renorm' is enabled, this provides a higher
|
|
// precision result
|
|
if (lighting.bump_renorm) {
|
|
constexpr std::string_view val =
|
|
"(1.0 - (surface_normal.x*surface_normal.x + surface_normal.y*surface_normal.y))";
|
|
out += fmt::format("surface_normal.z = sqrt(max({}, 0.0));\n", val);
|
|
}
|
|
|
|
// The tangent vector is not perturbed by the normal map and is just a unit vector.
|
|
out += "vec3 surface_tangent = vec3(1.0, 0.0, 0.0);\n";
|
|
} else if (lighting.bump_mode == LightingRegs::LightingBumpMode::TangentMap) {
|
|
// Bump mapping is enabled using a tangent map
|
|
out += fmt::format("vec3 surface_tangent = {};\n", Perturbation());
|
|
// Mathematically, recomputing Z-component of the tangent vector won't affect the relevant
|
|
// computation below, which is also confirmed on 3DS. So we don't bother recomputing here
|
|
// even if 'renorm' is enabled.
|
|
|
|
// The normal vector is not perturbed by the tangent map and is just a unit vector.
|
|
out += "vec3 surface_normal = vec3(0.0, 0.0, 1.0);\n";
|
|
} else {
|
|
// No bump mapping - surface local normal and tangent are just unit vectors
|
|
out += "vec3 surface_normal = vec3(0.0, 0.0, 1.0);\n"
|
|
"vec3 surface_tangent = vec3(1.0, 0.0, 0.0);\n";
|
|
}
|
|
|
|
// Rotate the surface-local normal by the interpolated normal quaternion to convert it to
|
|
// eyespace.
|
|
out += "vec4 normalized_normquat = normalize(normquat);\n"
|
|
"vec3 normal = quaternion_rotate(normalized_normquat, surface_normal);\n"
|
|
"vec3 tangent = quaternion_rotate(normalized_normquat, surface_tangent);\n";
|
|
|
|
if (lighting.enable_shadow) {
|
|
std::string shadow_texture = SampleTexture(config, lighting.shadow_selector);
|
|
if (lighting.shadow_invert) {
|
|
out += fmt::format("vec4 shadow = vec4(1.0) - {};\n", shadow_texture);
|
|
} else {
|
|
out += fmt::format("vec4 shadow = {};\n", shadow_texture);
|
|
}
|
|
} else {
|
|
out += "vec4 shadow = vec4(1.0);\n";
|
|
}
|
|
|
|
// Samples the specified lookup table for specular lighting
|
|
auto GetLutValue = [&lighting](LightingRegs::LightingSampler sampler, unsigned light_num,
|
|
LightingRegs::LightingLutInput input, bool abs) {
|
|
std::string index;
|
|
switch (input) {
|
|
case LightingRegs::LightingLutInput::NH:
|
|
index = "dot(normal, normalize(half_vector))";
|
|
break;
|
|
|
|
case LightingRegs::LightingLutInput::VH:
|
|
index = "dot(normalize(view), normalize(half_vector))";
|
|
break;
|
|
|
|
case LightingRegs::LightingLutInput::NV:
|
|
index = "dot(normal, normalize(view))";
|
|
break;
|
|
|
|
case LightingRegs::LightingLutInput::LN:
|
|
index = "dot(light_vector, normal)";
|
|
break;
|
|
|
|
case LightingRegs::LightingLutInput::SP:
|
|
index = "dot(light_vector, spot_dir)";
|
|
break;
|
|
|
|
case LightingRegs::LightingLutInput::CP:
|
|
// CP input is only available with configuration 7
|
|
if (lighting.config == LightingRegs::LightingConfig::Config7) {
|
|
// Note: even if the normal vector is modified by normal map, which is not the
|
|
// normal of the tangent plane anymore, the half angle vector is still projected
|
|
// using the modified normal vector.
|
|
constexpr std::string_view half_angle_proj =
|
|
"normalize(half_vector) - normal * dot(normal, normalize(half_vector))";
|
|
// Note: the half angle vector projection is confirmed not normalized before the dot
|
|
// product. The result is in fact not cos(phi) as the name suggested.
|
|
index = fmt::format("dot({}, tangent)", half_angle_proj);
|
|
} else {
|
|
index = "0.0";
|
|
}
|
|
break;
|
|
|
|
default:
|
|
LOG_CRITICAL(HW_GPU, "Unknown lighting LUT input {}", (int)input);
|
|
UNIMPLEMENTED();
|
|
index = "0.0";
|
|
break;
|
|
}
|
|
|
|
const auto sampler_index = static_cast<u32>(sampler);
|
|
|
|
if (abs) {
|
|
// LUT index is in the range of (0.0, 1.0)
|
|
index = lighting.light[light_num].two_sided_diffuse
|
|
? fmt::format("abs({})", index)
|
|
: fmt::format("max({}, 0.0)", index);
|
|
return fmt::format("LookupLightingLUTUnsigned({}, {})", sampler_index, index);
|
|
} else {
|
|
// LUT index is in the range of (-1.0, 1.0)
|
|
return fmt::format("LookupLightingLUTSigned({}, {})", sampler_index, index);
|
|
}
|
|
};
|
|
|
|
// Write the code to emulate each enabled light
|
|
for (unsigned light_index = 0; light_index < lighting.src_num; ++light_index) {
|
|
const auto& light_config = lighting.light[light_index];
|
|
const std::string light_src = fmt::format("light_src[{}]", light_config.num);
|
|
|
|
// Compute light vector (directional or positional)
|
|
if (light_config.directional) {
|
|
out += fmt::format("light_vector = {}.position;\n", light_src);
|
|
} else {
|
|
out += fmt::format("light_vector = {}.position + view;\n", light_src);
|
|
}
|
|
out += fmt::format("light_distance = length(light_vector);\n", light_src);
|
|
out += fmt::format("light_vector = normalize(light_vector);\n", light_src);
|
|
|
|
out += fmt::format("spot_dir = {}.spot_direction;\n", light_src);
|
|
out += "half_vector = normalize(view) + light_vector;\n";
|
|
|
|
// Compute dot product of light_vector and normal, adjust if lighting is one-sided or
|
|
// two-sided
|
|
out += std::string("dot_product = ") + (light_config.two_sided_diffuse
|
|
? "abs(dot(light_vector, normal));\n"
|
|
: "max(dot(light_vector, normal), 0.0);\n");
|
|
|
|
// If enabled, clamp specular component if lighting result is zero
|
|
if (lighting.clamp_highlights) {
|
|
out += "clamp_highlights = sign(dot_product);\n";
|
|
}
|
|
|
|
// If enabled, compute spot light attenuation value
|
|
std::string spot_atten = "1.0";
|
|
if (light_config.spot_atten_enable &&
|
|
LightingRegs::IsLightingSamplerSupported(
|
|
lighting.config, LightingRegs::LightingSampler::SpotlightAttenuation)) {
|
|
const std::string value =
|
|
GetLutValue(LightingRegs::SpotlightAttenuationSampler(light_config.num),
|
|
light_config.num, lighting.lut_sp.type, lighting.lut_sp.abs_input);
|
|
spot_atten = fmt::format("({:#} * {})", lighting.lut_sp.scale, value);
|
|
}
|
|
|
|
// If enabled, compute distance attenuation value
|
|
std::string dist_atten = "1.0";
|
|
if (light_config.dist_atten_enable) {
|
|
const std::string index = fmt::format("clamp({}.dist_atten_scale * light_distance "
|
|
"+ {}.dist_atten_bias, 0.0, 1.0)",
|
|
light_src, light_src, light_src);
|
|
const auto sampler = LightingRegs::DistanceAttenuationSampler(light_config.num);
|
|
dist_atten = fmt::format("LookupLightingLUTUnsigned({}, {})", sampler, index);
|
|
}
|
|
|
|
if (light_config.geometric_factor_0 || light_config.geometric_factor_1) {
|
|
out += "geo_factor = dot(half_vector, half_vector);\n"
|
|
"geo_factor = geo_factor == 0.0 ? 0.0 : min("
|
|
"dot_product / geo_factor, 1.0);\n";
|
|
}
|
|
|
|
// Specular 0 component
|
|
std::string d0_lut_value = "1.0";
|
|
if (lighting.lut_d0.enable &&
|
|
LightingRegs::IsLightingSamplerSupported(
|
|
lighting.config, LightingRegs::LightingSampler::Distribution0)) {
|
|
// Lookup specular "distribution 0" LUT value
|
|
const std::string value =
|
|
GetLutValue(LightingRegs::LightingSampler::Distribution0, light_config.num,
|
|
lighting.lut_d0.type, lighting.lut_d0.abs_input);
|
|
d0_lut_value = fmt::format("({:#} * {})", lighting.lut_d0.scale, value);
|
|
}
|
|
std::string specular_0 = fmt::format("({} * {}.specular_0)", d0_lut_value, light_src);
|
|
if (light_config.geometric_factor_0) {
|
|
specular_0 = fmt::format("({} * geo_factor)", specular_0);
|
|
}
|
|
|
|
// If enabled, lookup ReflectRed value, otherwise, 1.0 is used
|
|
if (lighting.lut_rr.enable &&
|
|
LightingRegs::IsLightingSamplerSupported(lighting.config,
|
|
LightingRegs::LightingSampler::ReflectRed)) {
|
|
std::string value =
|
|
GetLutValue(LightingRegs::LightingSampler::ReflectRed, light_config.num,
|
|
lighting.lut_rr.type, lighting.lut_rr.abs_input);
|
|
value = fmt::format("({:#} * {})", lighting.lut_rr.scale, value);
|
|
out += fmt::format("refl_value.r = {};\n", value);
|
|
} else {
|
|
out += "refl_value.r = 1.0;\n";
|
|
}
|
|
|
|
// If enabled, lookup ReflectGreen value, otherwise, ReflectRed value is used
|
|
if (lighting.lut_rg.enable &&
|
|
LightingRegs::IsLightingSamplerSupported(lighting.config,
|
|
LightingRegs::LightingSampler::ReflectGreen)) {
|
|
std::string value =
|
|
GetLutValue(LightingRegs::LightingSampler::ReflectGreen, light_config.num,
|
|
lighting.lut_rg.type, lighting.lut_rg.abs_input);
|
|
value = fmt::format("({:#} * {})", lighting.lut_rg.scale, value);
|
|
out += fmt::format("refl_value.g = {};\n", value);
|
|
} else {
|
|
out += "refl_value.g = refl_value.r;\n";
|
|
}
|
|
|
|
// If enabled, lookup ReflectBlue value, otherwise, ReflectRed value is used
|
|
if (lighting.lut_rb.enable &&
|
|
LightingRegs::IsLightingSamplerSupported(lighting.config,
|
|
LightingRegs::LightingSampler::ReflectBlue)) {
|
|
std::string value =
|
|
GetLutValue(LightingRegs::LightingSampler::ReflectBlue, light_config.num,
|
|
lighting.lut_rb.type, lighting.lut_rb.abs_input);
|
|
value = fmt::format("({:#} * {})", lighting.lut_rb.scale, value);
|
|
out += fmt::format("refl_value.b = {};\n", value);
|
|
} else {
|
|
out += "refl_value.b = refl_value.r;\n";
|
|
}
|
|
|
|
// Specular 1 component
|
|
std::string d1_lut_value = "1.0";
|
|
if (lighting.lut_d1.enable &&
|
|
LightingRegs::IsLightingSamplerSupported(
|
|
lighting.config, LightingRegs::LightingSampler::Distribution1)) {
|
|
// Lookup specular "distribution 1" LUT value
|
|
const std::string value =
|
|
GetLutValue(LightingRegs::LightingSampler::Distribution1, light_config.num,
|
|
lighting.lut_d1.type, lighting.lut_d1.abs_input);
|
|
d1_lut_value = fmt::format("({:#} * {})", lighting.lut_d1.scale, value);
|
|
}
|
|
std::string specular_1 =
|
|
fmt::format("({} * refl_value * {}.specular_1)", d1_lut_value, light_src);
|
|
if (light_config.geometric_factor_1) {
|
|
specular_1 = fmt::format("({} * geo_factor)", specular_1);
|
|
}
|
|
|
|
// Fresnel
|
|
// Note: only the last entry in the light slots applies the Fresnel factor
|
|
if (light_index == lighting.src_num - 1 && lighting.lut_fr.enable &&
|
|
LightingRegs::IsLightingSamplerSupported(lighting.config,
|
|
LightingRegs::LightingSampler::Fresnel)) {
|
|
// Lookup fresnel LUT value
|
|
std::string value =
|
|
GetLutValue(LightingRegs::LightingSampler::Fresnel, light_config.num,
|
|
lighting.lut_fr.type, lighting.lut_fr.abs_input);
|
|
value = fmt::format("({:#} * {})", lighting.lut_fr.scale, value);
|
|
|
|
// Enabled for diffuse lighting alpha component
|
|
if (lighting.enable_primary_alpha) {
|
|
out += fmt::format("diffuse_sum.a = {};\n", value);
|
|
}
|
|
|
|
// Enabled for the specular lighting alpha component
|
|
if (lighting.enable_secondary_alpha) {
|
|
out += fmt::format("specular_sum.a = {};\n", value);
|
|
}
|
|
}
|
|
|
|
bool shadow_primary_enable = lighting.shadow_primary && light_config.shadow_enable;
|
|
bool shadow_secondary_enable = lighting.shadow_secondary && light_config.shadow_enable;
|
|
std::string shadow_primary = shadow_primary_enable ? " * shadow.rgb" : "";
|
|
std::string shadow_secondary = shadow_secondary_enable ? " * shadow.rgb" : "";
|
|
|
|
// Compute primary fragment color (diffuse lighting) function
|
|
out += fmt::format(
|
|
"diffuse_sum.rgb += (({}.diffuse * dot_product) + {}.ambient) * {} * {}{};\n",
|
|
light_src, light_src, dist_atten, spot_atten, shadow_primary);
|
|
|
|
// Compute secondary fragment color (specular lighting) function
|
|
out += fmt::format("specular_sum.rgb += ({} + {}) * clamp_highlights * {} * {}{};\n",
|
|
specular_0, specular_1, dist_atten, spot_atten, shadow_secondary);
|
|
}
|
|
|
|
// Apply shadow attenuation to alpha components if enabled
|
|
if (lighting.shadow_alpha) {
|
|
if (lighting.enable_primary_alpha) {
|
|
out += "diffuse_sum.a *= shadow.a;\n";
|
|
}
|
|
if (lighting.enable_secondary_alpha) {
|
|
out += "specular_sum.a *= shadow.a;\n";
|
|
}
|
|
}
|
|
|
|
// Sum final lighting result
|
|
out += "diffuse_sum.rgb += lighting_global_ambient;\n"
|
|
"primary_fragment_color = clamp(diffuse_sum, vec4(0.0), vec4(1.0));\n"
|
|
"secondary_fragment_color = clamp(specular_sum, vec4(0.0), vec4(1.0));\n";
|
|
}
|
|
|
|
using ProcTexClamp = TexturingRegs::ProcTexClamp;
|
|
using ProcTexShift = TexturingRegs::ProcTexShift;
|
|
using ProcTexCombiner = TexturingRegs::ProcTexCombiner;
|
|
using ProcTexFilter = TexturingRegs::ProcTexFilter;
|
|
|
|
static void AppendProcTexShiftOffset(std::string& out, std::string_view v, ProcTexShift mode,
|
|
ProcTexClamp clamp_mode) {
|
|
const std::string_view offset = (clamp_mode == ProcTexClamp::MirroredRepeat) ? "1.0" : "0.5";
|
|
switch (mode) {
|
|
case ProcTexShift::None:
|
|
out += "0.0";
|
|
break;
|
|
case ProcTexShift::Odd:
|
|
out += fmt::format("{} * float((int({}) / 2) % 2)", offset, v);
|
|
break;
|
|
case ProcTexShift::Even:
|
|
out += fmt::format("{} * float(((int({}) + 1) / 2) % 2)", offset, v);
|
|
break;
|
|
default:
|
|
LOG_CRITICAL(HW_GPU, "Unknown shift mode {}", mode);
|
|
out += "0.0";
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void AppendProcTexClamp(std::string& out, std::string_view var, ProcTexClamp mode) {
|
|
switch (mode) {
|
|
case ProcTexClamp::ToZero:
|
|
out += fmt::format("{0} = {0} > 1.0 ? 0 : {0};\n", var);
|
|
break;
|
|
case ProcTexClamp::ToEdge:
|
|
out += fmt::format("{0} = min({0}, 1.0);\n", var);
|
|
break;
|
|
case ProcTexClamp::SymmetricalRepeat:
|
|
out += fmt::format("{0} = fract({0});\n", var);
|
|
break;
|
|
case ProcTexClamp::MirroredRepeat: {
|
|
out += fmt::format("{0} = int({0}) % 2 == 0 ? fract({0}) : 1.0 - fract({0});\n", var);
|
|
break;
|
|
}
|
|
case ProcTexClamp::Pulse:
|
|
out += fmt::format("{0} = {0} > 0.5 ? 1.0 : 0.0;\n", var);
|
|
break;
|
|
default:
|
|
LOG_CRITICAL(HW_GPU, "Unknown clamp mode {}", mode);
|
|
out += fmt::format("{0} = min({0}, 1.0);\n", var);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void AppendProcTexCombineAndMap(std::string& out, ProcTexCombiner combiner,
|
|
std::string_view offset) {
|
|
const auto combined = [combiner]() -> std::string_view {
|
|
switch (combiner) {
|
|
case ProcTexCombiner::U:
|
|
return "u";
|
|
case ProcTexCombiner::U2:
|
|
return "(u * u)";
|
|
case TexturingRegs::ProcTexCombiner::V:
|
|
return "v";
|
|
case TexturingRegs::ProcTexCombiner::V2:
|
|
return "(v * v)";
|
|
case TexturingRegs::ProcTexCombiner::Add:
|
|
return "((u + v) * 0.5)";
|
|
case TexturingRegs::ProcTexCombiner::Add2:
|
|
return "((u * u + v * v) * 0.5)";
|
|
case TexturingRegs::ProcTexCombiner::SqrtAdd2:
|
|
return "min(sqrt(u * u + v * v), 1.0)";
|
|
case TexturingRegs::ProcTexCombiner::Min:
|
|
return "min(u, v)";
|
|
case TexturingRegs::ProcTexCombiner::Max:
|
|
return "max(u, v)";
|
|
case TexturingRegs::ProcTexCombiner::RMax:
|
|
return "min(((u + v) * 0.5 + sqrt(u * u + v * v)) * 0.5, 1.0)";
|
|
default:
|
|
LOG_CRITICAL(HW_GPU, "Unknown combiner {}", combiner);
|
|
return "0.0";
|
|
}
|
|
}();
|
|
|
|
out += fmt::format("ProcTexLookupLUT({}, {})", offset, combined);
|
|
}
|
|
|
|
static void AppendProcTexSampler(std::string& out, const PicaFSConfig& config) {
|
|
// LUT sampling uitlity
|
|
// For NoiseLUT/ColorMap/AlphaMap, coord=0.0 is lut[0], coord=127.0/128.0 is lut[127] and
|
|
// coord=1.0 is lut[127]+lut_diff[127]. For other indices, the result is interpolated using
|
|
// value entries and difference entries.
|
|
out += R"(
|
|
float ProcTexLookupLUT(int offset, float coord) {
|
|
coord *= 128.0;
|
|
float index_i = clamp(floor(coord), 0.0, 127.0);
|
|
float index_f = coord - index_i; // fract() cannot be used here because 128.0 needs to be
|
|
// extracted as index_i = 127.0 and index_f = 1.0
|
|
vec2 entry = texelFetch(texture_buffer_lut_rg, int(index_i) + offset).rg;
|
|
return clamp(entry.r + entry.g * index_f, 0.0, 1.0);
|
|
}
|
|
)";
|
|
|
|
// Noise utility
|
|
if (config.state.proctex.noise_enable) {
|
|
// See swrasterizer/proctex.cpp for more information about these functions
|
|
out += R"(
|
|
int ProcTexNoiseRand1D(int v) {
|
|
const int table[] = int[](0,4,10,8,4,9,7,12,5,15,13,14,11,15,2,11);
|
|
return ((v % 9 + 2) * 3 & 0xF) ^ table[(v / 9) & 0xF];
|
|
}
|
|
|
|
float ProcTexNoiseRand2D(vec2 point) {
|
|
const int table[] = int[](10,2,15,8,0,7,4,5,5,13,2,6,13,9,3,14);
|
|
int u2 = ProcTexNoiseRand1D(int(point.x));
|
|
int v2 = ProcTexNoiseRand1D(int(point.y));
|
|
v2 += ((u2 & 3) == 1) ? 4 : 0;
|
|
v2 ^= (u2 & 1) * 6;
|
|
v2 += 10 + u2;
|
|
v2 &= 0xF;
|
|
v2 ^= table[u2];
|
|
return -1.0 + float(v2) * 2.0/ 15.0;
|
|
}
|
|
|
|
float ProcTexNoiseCoef(vec2 x) {
|
|
vec2 grid = 9.0 * proctex_noise_f * abs(x + proctex_noise_p);
|
|
vec2 point = floor(grid);
|
|
vec2 frac = grid - point;
|
|
|
|
float g0 = ProcTexNoiseRand2D(point) * (frac.x + frac.y);
|
|
float g1 = ProcTexNoiseRand2D(point + vec2(1.0, 0.0)) * (frac.x + frac.y - 1.0);
|
|
float g2 = ProcTexNoiseRand2D(point + vec2(0.0, 1.0)) * (frac.x + frac.y - 1.0);
|
|
float g3 = ProcTexNoiseRand2D(point + vec2(1.0, 1.0)) * (frac.x + frac.y - 2.0);
|
|
|
|
float x_noise = ProcTexLookupLUT(proctex_noise_lut_offset, frac.x);
|
|
float y_noise = ProcTexLookupLUT(proctex_noise_lut_offset, frac.y);
|
|
float x0 = mix(g0, g1, x_noise);
|
|
float x1 = mix(g2, g3, x_noise);
|
|
return mix(x0, x1, y_noise);
|
|
}
|
|
)";
|
|
}
|
|
|
|
out += "vec4 SampleProcTexColor(float lut_coord, int level) {\n";
|
|
out += fmt::format("int lut_width = {} >> level;\n", config.state.proctex.lut_width);
|
|
// Offsets for level 4-7 seem to be hardcoded
|
|
out += fmt::format("int lut_offsets[8] = int[]({}, {}, {}, {}, 0xF0, 0xF8, 0xFC, 0xFE);\n",
|
|
config.state.proctex.lut_offset0, config.state.proctex.lut_offset1,
|
|
config.state.proctex.lut_offset2, config.state.proctex.lut_offset3);
|
|
out += "int lut_offset = lut_offsets[level];\n";
|
|
// For the color lut, coord=0.0 is lut[offset] and coord=1.0 is lut[offset+width-1]
|
|
out += "lut_coord *= float(lut_width - 1);\n";
|
|
|
|
switch (config.state.proctex.lut_filter) {
|
|
case ProcTexFilter::Linear:
|
|
case ProcTexFilter::LinearMipmapLinear:
|
|
case ProcTexFilter::LinearMipmapNearest:
|
|
out += "int lut_index_i = int(lut_coord) + lut_offset;\n";
|
|
out += "float lut_index_f = fract(lut_coord);\n";
|
|
out += "return texelFetch(texture_buffer_lut_rgba, lut_index_i + "
|
|
"proctex_lut_offset) + "
|
|
"lut_index_f * "
|
|
"texelFetch(texture_buffer_lut_rgba, lut_index_i + proctex_diff_lut_offset);\n";
|
|
break;
|
|
case ProcTexFilter::Nearest:
|
|
case ProcTexFilter::NearestMipmapLinear:
|
|
case ProcTexFilter::NearestMipmapNearest:
|
|
out += "lut_coord += float(lut_offset);\n";
|
|
out += "return texelFetch(texture_buffer_lut_rgba, int(round(lut_coord)) + "
|
|
"proctex_lut_offset);\n";
|
|
break;
|
|
}
|
|
|
|
out += "}\n";
|
|
|
|
out += "vec4 ProcTex() {\n";
|
|
if (config.state.proctex.coord < 3) {
|
|
out += fmt::format("vec2 uv = abs(texcoord{});\n", config.state.proctex.coord);
|
|
} else {
|
|
LOG_CRITICAL(Render_OpenGL, "Unexpected proctex.coord >= 3");
|
|
out += "vec2 uv = abs(texcoord0);\n";
|
|
}
|
|
|
|
// This LOD formula is the same as the LOD upper limit defined in OpenGL.
|
|
// f(x, y) <= m_u + m_v + m_w
|
|
// (See OpenGL 4.6 spec, 8.14.1 - Scale Factor and Level-of-Detail)
|
|
// Note: this is different from the one normal 2D textures use.
|
|
out += "vec2 duv = max(abs(dFdx(uv)), abs(dFdy(uv)));\n";
|
|
// unlike normal texture, the bias is inside the log2
|
|
out += fmt::format("float lod = log2(abs(float({}) * proctex_bias) * (duv.x + duv.y));\n",
|
|
config.state.proctex.lut_width);
|
|
out += "if (proctex_bias == 0.0) lod = 0.0;\n";
|
|
out += fmt::format("lod = clamp(lod, {:#}, {:#});\n",
|
|
std::max(0.0f, static_cast<float>(config.state.proctex.lod_min)),
|
|
std::min(7.0f, static_cast<float>(config.state.proctex.lod_max)));
|
|
// Get shift offset before noise generation
|
|
out += "float u_shift = ";
|
|
AppendProcTexShiftOffset(out, "uv.y", config.state.proctex.u_shift,
|
|
config.state.proctex.u_clamp);
|
|
out += ";\n";
|
|
out += "float v_shift = ";
|
|
AppendProcTexShiftOffset(out, "uv.x", config.state.proctex.v_shift,
|
|
config.state.proctex.v_clamp);
|
|
out += ";\n";
|
|
|
|
// Generate noise
|
|
if (config.state.proctex.noise_enable) {
|
|
out += "uv += proctex_noise_a * ProcTexNoiseCoef(uv);\n"
|
|
"uv = abs(uv);\n";
|
|
}
|
|
|
|
// Shift
|
|
out += "float u = uv.x + u_shift;\n"
|
|
"float v = uv.y + v_shift;\n";
|
|
|
|
// Clamp
|
|
AppendProcTexClamp(out, "u", config.state.proctex.u_clamp);
|
|
AppendProcTexClamp(out, "v", config.state.proctex.v_clamp);
|
|
|
|
// Combine and map
|
|
out += "float lut_coord = ";
|
|
AppendProcTexCombineAndMap(out, config.state.proctex.color_combiner,
|
|
"proctex_color_map_offset");
|
|
out += ";\n";
|
|
|
|
switch (config.state.proctex.lut_filter) {
|
|
case ProcTexFilter::Linear:
|
|
case ProcTexFilter::Nearest:
|
|
out += "vec4 final_color = SampleProcTexColor(lut_coord, 0);\n";
|
|
break;
|
|
case ProcTexFilter::NearestMipmapNearest:
|
|
case ProcTexFilter::LinearMipmapNearest:
|
|
out += "vec4 final_color = SampleProcTexColor(lut_coord, int(round(lod)));\n";
|
|
break;
|
|
case ProcTexFilter::NearestMipmapLinear:
|
|
case ProcTexFilter::LinearMipmapLinear:
|
|
out += "int lod_i = int(lod);\n"
|
|
"float lod_f = fract(lod);\n"
|
|
"vec4 final_color = mix(SampleProcTexColor(lut_coord, lod_i), "
|
|
"SampleProcTexColor(lut_coord, lod_i + 1), lod_f);\n";
|
|
break;
|
|
}
|
|
|
|
if (config.state.proctex.separate_alpha) {
|
|
// Note: in separate alpha mode, the alpha channel skips the color LUT look up stage. It
|
|
// uses the output of CombineAndMap directly instead.
|
|
out += "float final_alpha = ";
|
|
AppendProcTexCombineAndMap(out, config.state.proctex.alpha_combiner,
|
|
"proctex_alpha_map_offset");
|
|
out += ";\n";
|
|
out += "return vec4(final_color.xyz, final_alpha);\n}\n";
|
|
} else {
|
|
out += "return final_color;\n}\n";
|
|
}
|
|
}
|
|
|
|
ShaderDecompiler::ProgramResult GenerateFragmentShader(const PicaFSConfig& config,
|
|
bool separable_shader) {
|
|
const auto& state = config.state;
|
|
std::string out;
|
|
|
|
if (separable_shader && !GLES) {
|
|
out += "#extension GL_ARB_separate_shader_objects : enable\n";
|
|
}
|
|
|
|
if (GLES) {
|
|
out += fragment_shader_precision_OES;
|
|
}
|
|
|
|
out += GetVertexInterfaceDeclaration(false, separable_shader);
|
|
|
|
out += R"(
|
|
#ifndef CITRA_GLES
|
|
in vec4 gl_FragCoord;
|
|
#endif // CITRA_GLES
|
|
|
|
out vec4 color;
|
|
|
|
uniform sampler2D tex0;
|
|
uniform sampler2D tex1;
|
|
uniform sampler2D tex2;
|
|
uniform sampler2D tex_normal; //< Used for custom normal maps
|
|
uniform samplerCube tex_cube;
|
|
uniform samplerBuffer texture_buffer_lut_lf;
|
|
uniform samplerBuffer texture_buffer_lut_rg;
|
|
uniform samplerBuffer texture_buffer_lut_rgba;
|
|
|
|
layout(r32ui) uniform readonly uimage2D shadow_texture_px;
|
|
layout(r32ui) uniform readonly uimage2D shadow_texture_nx;
|
|
layout(r32ui) uniform readonly uimage2D shadow_texture_py;
|
|
layout(r32ui) uniform readonly uimage2D shadow_texture_ny;
|
|
layout(r32ui) uniform readonly uimage2D shadow_texture_pz;
|
|
layout(r32ui) uniform readonly uimage2D shadow_texture_nz;
|
|
layout(r32ui) uniform uimage2D shadow_buffer;
|
|
)";
|
|
|
|
out += UniformBlockDef;
|
|
|
|
out += R"(
|
|
// Rotate the vector v by the quaternion q
|
|
vec3 quaternion_rotate(vec4 q, vec3 v) {
|
|
return v + 2.0 * cross(q.xyz, cross(q.xyz, v) + q.w * v);
|
|
}
|
|
|
|
float LookupLightingLUT(int lut_index, int index, float delta) {
|
|
vec2 entry = texelFetch(texture_buffer_lut_lf, lighting_lut_offset[lut_index >> 2][lut_index & 3] + index).rg;
|
|
return entry.r + entry.g * delta;
|
|
}
|
|
|
|
float LookupLightingLUTUnsigned(int lut_index, float pos) {
|
|
int index = clamp(int(pos * 256.0), 0, 255);
|
|
float delta = pos * 256.0 - float(index);
|
|
return LookupLightingLUT(lut_index, index, delta);
|
|
}
|
|
|
|
float LookupLightingLUTSigned(int lut_index, float pos) {
|
|
int index = clamp(int(pos * 128.0), -128, 127);
|
|
float delta = pos * 128.0 - float(index);
|
|
if (index < 0) index += 256;
|
|
return LookupLightingLUT(lut_index, index, delta);
|
|
}
|
|
|
|
float byteround(float x) {
|
|
return round(x * 255.0) * (1.0 / 255.0);
|
|
}
|
|
|
|
vec2 byteround(vec2 x) {
|
|
return round(x * 255.0) * (1.0 / 255.0);
|
|
}
|
|
|
|
vec3 byteround(vec3 x) {
|
|
return round(x * 255.0) * (1.0 / 255.0);
|
|
}
|
|
|
|
vec4 byteround(vec4 x) {
|
|
return round(x * 255.0) * (1.0 / 255.0);
|
|
}
|
|
|
|
// PICA's LOD formula for 2D textures.
|
|
// This LOD formula is the same as the LOD lower limit defined in OpenGL.
|
|
// f(x, y) >= max{m_u, m_v, m_w}
|
|
// (See OpenGL 4.6 spec, 8.14.1 - Scale Factor and Level-of-Detail)
|
|
float getLod(vec2 coord) {
|
|
vec2 d = max(abs(dFdx(coord)), abs(dFdy(coord)));
|
|
return log2(max(d.x, d.y));
|
|
}
|
|
|
|
uvec2 DecodeShadow(uint pixel) {
|
|
return uvec2(pixel >> 8, pixel & 0xFFu);
|
|
}
|
|
|
|
uint EncodeShadow(uvec2 pixel) {
|
|
return (pixel.x << 8) | pixel.y;
|
|
}
|
|
|
|
float CompareShadow(uint pixel, uint z) {
|
|
uvec2 p = DecodeShadow(pixel);
|
|
return mix(float(p.y) * (1.0 / 255.0), 0.0, p.x <= z);
|
|
}
|
|
|
|
float SampleShadow2D(ivec2 uv, uint z) {
|
|
if (any(bvec4( lessThan(uv, ivec2(0)), greaterThanEqual(uv, imageSize(shadow_texture_px)) )))
|
|
return 1.0;
|
|
return CompareShadow(imageLoad(shadow_texture_px, uv).x, z);
|
|
}
|
|
|
|
float mix2(vec4 s, vec2 a) {
|
|
vec2 t = mix(s.xy, s.zw, a.yy);
|
|
return mix(t.x, t.y, a.x);
|
|
}
|
|
|
|
vec4 shadowTexture(vec2 uv, float w) {
|
|
)";
|
|
if (!config.state.shadow_texture_orthographic) {
|
|
out += "uv /= w;";
|
|
}
|
|
out += "uint z = uint(max(0, int(min(abs(w), 1.0) * float(0xFFFFFF)) - shadow_texture_bias));";
|
|
out += R"(
|
|
vec2 coord = vec2(imageSize(shadow_texture_px)) * uv - vec2(0.5);
|
|
vec2 coord_floor = floor(coord);
|
|
vec2 f = coord - coord_floor;
|
|
ivec2 i = ivec2(coord_floor);
|
|
vec4 s = vec4(
|
|
SampleShadow2D(i , z),
|
|
SampleShadow2D(i + ivec2(1, 0), z),
|
|
SampleShadow2D(i + ivec2(0, 1), z),
|
|
SampleShadow2D(i + ivec2(1, 1), z));
|
|
return vec4(mix2(s, f));
|
|
}
|
|
|
|
vec4 shadowTextureCube(vec2 uv, float w) {
|
|
ivec2 size = imageSize(shadow_texture_px);
|
|
vec3 c = vec3(uv, w);
|
|
vec3 a = abs(c);
|
|
if (a.x > a.y && a.x > a.z) {
|
|
w = a.x;
|
|
uv = -c.zy;
|
|
if (c.x < 0.0) uv.x = -uv.x;
|
|
} else if (a.y > a.z) {
|
|
w = a.y;
|
|
uv = c.xz;
|
|
if (c.y < 0.0) uv.y = -uv.y;
|
|
} else {
|
|
w = a.z;
|
|
uv = -c.xy;
|
|
if (c.z > 0.0) uv.x = -uv.x;
|
|
}
|
|
)";
|
|
out += "uint z = uint(max(0, int(min(w, 1.0) * float(0xFFFFFF)) - shadow_texture_bias));";
|
|
out += R"(
|
|
vec2 coord = vec2(size) * (uv / w * vec2(0.5) + vec2(0.5)) - vec2(0.5);
|
|
vec2 coord_floor = floor(coord);
|
|
vec2 f = coord - coord_floor;
|
|
ivec2 i00 = ivec2(coord_floor);
|
|
ivec2 i10 = i00 + ivec2(1, 0);
|
|
ivec2 i01 = i00 + ivec2(0, 1);
|
|
ivec2 i11 = i00 + ivec2(1, 1);
|
|
ivec2 cmin = ivec2(0), cmax = size - ivec2(1, 1);
|
|
i00 = clamp(i00, cmin, cmax);
|
|
i10 = clamp(i10, cmin, cmax);
|
|
i01 = clamp(i01, cmin, cmax);
|
|
i11 = clamp(i11, cmin, cmax);
|
|
uvec4 pixels;
|
|
// This part should have been refactored into functions,
|
|
// but many drivers don't like passing uimage2D as parameters
|
|
if (a.x > a.y && a.x > a.z) {
|
|
if (c.x > 0.0)
|
|
pixels = uvec4(
|
|
imageLoad(shadow_texture_px, i00).r,
|
|
imageLoad(shadow_texture_px, i10).r,
|
|
imageLoad(shadow_texture_px, i01).r,
|
|
imageLoad(shadow_texture_px, i11).r);
|
|
else
|
|
pixels = uvec4(
|
|
imageLoad(shadow_texture_nx, i00).r,
|
|
imageLoad(shadow_texture_nx, i10).r,
|
|
imageLoad(shadow_texture_nx, i01).r,
|
|
imageLoad(shadow_texture_nx, i11).r);
|
|
} else if (a.y > a.z) {
|
|
if (c.y > 0.0)
|
|
pixels = uvec4(
|
|
imageLoad(shadow_texture_py, i00).r,
|
|
imageLoad(shadow_texture_py, i10).r,
|
|
imageLoad(shadow_texture_py, i01).r,
|
|
imageLoad(shadow_texture_py, i11).r);
|
|
else
|
|
pixels = uvec4(
|
|
imageLoad(shadow_texture_ny, i00).r,
|
|
imageLoad(shadow_texture_ny, i10).r,
|
|
imageLoad(shadow_texture_ny, i01).r,
|
|
imageLoad(shadow_texture_ny, i11).r);
|
|
} else {
|
|
if (c.z > 0.0)
|
|
pixels = uvec4(
|
|
imageLoad(shadow_texture_pz, i00).r,
|
|
imageLoad(shadow_texture_pz, i10).r,
|
|
imageLoad(shadow_texture_pz, i01).r,
|
|
imageLoad(shadow_texture_pz, i11).r);
|
|
else
|
|
pixels = uvec4(
|
|
imageLoad(shadow_texture_nz, i00).r,
|
|
imageLoad(shadow_texture_nz, i10).r,
|
|
imageLoad(shadow_texture_nz, i01).r,
|
|
imageLoad(shadow_texture_nz, i11).r);
|
|
}
|
|
vec4 s = vec4(
|
|
CompareShadow(pixels.x, z),
|
|
CompareShadow(pixels.y, z),
|
|
CompareShadow(pixels.z, z),
|
|
CompareShadow(pixels.w, z));
|
|
return vec4(mix2(s, f));
|
|
}
|
|
)";
|
|
|
|
if (config.state.proctex.enable)
|
|
AppendProcTexSampler(out, config);
|
|
|
|
// We round the interpolated primary color to the nearest 1/255th
|
|
// This maintains the PICA's 8 bits of precision
|
|
out += R"(
|
|
void main() {
|
|
vec4 rounded_primary_color = byteround(primary_color);
|
|
vec4 primary_fragment_color = vec4(0.0);
|
|
vec4 secondary_fragment_color = vec4(0.0);
|
|
)";
|
|
|
|
// Do not do any sort of processing if it's obvious we're not going to pass the alpha test
|
|
if (state.alpha_test_func == FramebufferRegs::CompareFunc::Never) {
|
|
out += "discard; }";
|
|
return {std::move(out)};
|
|
}
|
|
|
|
// Append the scissor test
|
|
if (state.scissor_test_mode != RasterizerRegs::ScissorMode::Disabled) {
|
|
out += "if (";
|
|
// Negate the condition if we have to keep only the pixels outside the scissor box
|
|
if (state.scissor_test_mode == RasterizerRegs::ScissorMode::Include) {
|
|
out += '!';
|
|
}
|
|
out += "(gl_FragCoord.x >= float(scissor_x1) && "
|
|
"gl_FragCoord.y >= float(scissor_y1) && "
|
|
"gl_FragCoord.x < float(scissor_x2) && "
|
|
"gl_FragCoord.y < float(scissor_y2))) discard;\n";
|
|
}
|
|
|
|
// After perspective divide, OpenGL transform z_over_w from [-1, 1] to [near, far]. Here we use
|
|
// default near = 0 and far = 1, and undo the transformation to get the original z_over_w, then
|
|
// do our own transformation according to PICA specification.
|
|
out += "float z_over_w = 2.0 * gl_FragCoord.z - 1.0;\n"
|
|
"float depth = z_over_w * depth_scale + depth_offset;\n";
|
|
if (state.depthmap_enable == RasterizerRegs::DepthBuffering::WBuffering) {
|
|
out += "depth /= gl_FragCoord.w;\n";
|
|
}
|
|
|
|
if (state.lighting.enable)
|
|
WriteLighting(out, config);
|
|
|
|
out += "vec4 combiner_buffer = vec4(0.0);\n"
|
|
"vec4 next_combiner_buffer = tev_combiner_buffer_color;\n"
|
|
"vec4 last_tex_env_out = vec4(0.0);\n";
|
|
|
|
for (std::size_t index = 0; index < state.tev_stages.size(); ++index) {
|
|
WriteTevStage(out, config, static_cast<u32>(index));
|
|
}
|
|
|
|
if (state.alpha_test_func != FramebufferRegs::CompareFunc::Always) {
|
|
out += "if (";
|
|
AppendAlphaTestCondition(out, state.alpha_test_func);
|
|
out += ") discard;\n";
|
|
}
|
|
|
|
// Append fog combiner
|
|
if (state.fog_mode == TexturingRegs::FogMode::Fog) {
|
|
// Get index into fog LUT
|
|
if (state.fog_flip) {
|
|
out += "float fog_index = (1.0 - float(depth)) * 128.0;\n";
|
|
} else {
|
|
out += "float fog_index = depth * 128.0;\n";
|
|
}
|
|
|
|
// Generate clamped fog factor from LUT for given fog index
|
|
out += "float fog_i = clamp(floor(fog_index), 0.0, 127.0);\n"
|
|
"float fog_f = fog_index - fog_i;\n"
|
|
"vec2 fog_lut_entry = texelFetch(texture_buffer_lut_lf, int(fog_i) + "
|
|
"fog_lut_offset).rg;\n"
|
|
"float fog_factor = fog_lut_entry.r + fog_lut_entry.g * fog_f;\n"
|
|
"fog_factor = clamp(fog_factor, 0.0, 1.0);\n";
|
|
|
|
// Blend the fog
|
|
out += "last_tex_env_out.rgb = mix(fog_color.rgb, last_tex_env_out.rgb, fog_factor);\n";
|
|
} else if (state.fog_mode == TexturingRegs::FogMode::Gas) {
|
|
Core::System::GetInstance().TelemetrySession().AddField(
|
|
Common::Telemetry::FieldType::Session, "VideoCore_Pica_UseGasMode", true);
|
|
LOG_CRITICAL(Render_OpenGL, "Unimplemented gas mode");
|
|
out += "discard; }";
|
|
return {std::move(out)};
|
|
}
|
|
|
|
if (state.shadow_rendering) {
|
|
out += R"(
|
|
uint d = uint(clamp(depth, 0.0, 1.0) * float(0xFFFFFF));
|
|
uint s = uint(last_tex_env_out.g * float(0xFF));
|
|
ivec2 image_coord = ivec2(gl_FragCoord.xy);
|
|
|
|
uint old = imageLoad(shadow_buffer, image_coord).x;
|
|
uint new;
|
|
uint old2;
|
|
do {
|
|
old2 = old;
|
|
|
|
uvec2 ref = DecodeShadow(old);
|
|
if (d < ref.x) {
|
|
if (s == 0u) {
|
|
ref.x = d;
|
|
} else {
|
|
s = uint(float(s) / (shadow_bias_constant + shadow_bias_linear * float(d) / float(ref.x)));
|
|
ref.y = min(s, ref.y);
|
|
}
|
|
}
|
|
new = EncodeShadow(ref);
|
|
|
|
} while ((old = imageAtomicCompSwap(shadow_buffer, image_coord, old, new)) != old2);
|
|
)";
|
|
} else {
|
|
out += "gl_FragDepth = depth;\n";
|
|
// Round the final fragment color to maintain the PICA's 8 bits of precision
|
|
out += "color = byteround(last_tex_env_out);\n";
|
|
}
|
|
|
|
if (GLES) {
|
|
if (!state.alphablend_enable) {
|
|
switch (state.logic_op) {
|
|
case FramebufferRegs::LogicOp::Clear:
|
|
out += "color = vec4(0);\n";
|
|
break;
|
|
case FramebufferRegs::LogicOp::Set:
|
|
out += "color = vec4(1);\n";
|
|
break;
|
|
case FramebufferRegs::LogicOp::Copy:
|
|
// Take the color output as-is
|
|
break;
|
|
case FramebufferRegs::LogicOp::CopyInverted:
|
|
out += "color = ~color;\n";
|
|
break;
|
|
case FramebufferRegs::LogicOp::NoOp:
|
|
// We need to discard the color, but not necessarily the depth. This is not possible
|
|
// with fragment shader alone, so we emulate this behavior on GLES with glColorMask.
|
|
break;
|
|
default:
|
|
LOG_CRITICAL(HW_GPU, "Unhandled logic_op {:x}", static_cast<int>(state.logic_op));
|
|
UNIMPLEMENTED();
|
|
}
|
|
}
|
|
}
|
|
|
|
out += '}';
|
|
|
|
return {std::move(out)};
|
|
}
|
|
|
|
ShaderDecompiler::ProgramResult GenerateTrivialVertexShader(bool separable_shader) {
|
|
std::string out;
|
|
if (separable_shader && !GLES) {
|
|
out += "#extension GL_ARB_separate_shader_objects : enable\n";
|
|
}
|
|
|
|
out +=
|
|
fmt::format("layout(location = {}) in vec4 vert_position;\n"
|
|
"layout(location = {}) in vec4 vert_color;\n"
|
|
"layout(location = {}) in vec2 vert_texcoord0;\n"
|
|
"layout(location = {}) in vec2 vert_texcoord1;\n"
|
|
"layout(location = {}) in vec2 vert_texcoord2;\n"
|
|
"layout(location = {}) in float vert_texcoord0_w;\n"
|
|
"layout(location = {}) in vec4 vert_normquat;\n"
|
|
"layout(location = {}) in vec3 vert_view;\n",
|
|
ATTRIBUTE_POSITION, ATTRIBUTE_COLOR, ATTRIBUTE_TEXCOORD0, ATTRIBUTE_TEXCOORD1,
|
|
ATTRIBUTE_TEXCOORD2, ATTRIBUTE_TEXCOORD0_W, ATTRIBUTE_NORMQUAT, ATTRIBUTE_VIEW);
|
|
|
|
out += GetVertexInterfaceDeclaration(true, separable_shader);
|
|
|
|
out += UniformBlockDef;
|
|
|
|
out += R"(
|
|
|
|
void main() {
|
|
primary_color = vert_color;
|
|
texcoord0 = vert_texcoord0;
|
|
texcoord1 = vert_texcoord1;
|
|
texcoord2 = vert_texcoord2;
|
|
texcoord0_w = vert_texcoord0_w;
|
|
normquat = vert_normquat;
|
|
view = vert_view;
|
|
gl_Position = vert_position;
|
|
#if !defined(CITRA_GLES) || defined(GL_EXT_clip_cull_distance)
|
|
gl_ClipDistance[0] = -vert_position.z; // fixed PICA clipping plane z <= 0
|
|
gl_ClipDistance[1] = dot(clip_coef, vert_position);
|
|
#endif // !defined(CITRA_GLES) || defined(GL_EXT_clip_cull_distance)
|
|
}
|
|
)";
|
|
|
|
return {std::move(out)};
|
|
}
|
|
|
|
std::optional<ShaderDecompiler::ProgramResult> GenerateVertexShader(
|
|
const Pica::Shader::ShaderSetup& setup, const PicaVSConfig& config, bool separable_shader) {
|
|
std::string out;
|
|
if (separable_shader && !GLES) {
|
|
out += "#extension GL_ARB_separate_shader_objects : enable\n";
|
|
}
|
|
|
|
out += ShaderDecompiler::GetCommonDeclarations();
|
|
|
|
std::array<bool, 16> used_regs{};
|
|
const auto get_input_reg = [&used_regs](u32 reg) {
|
|
ASSERT(reg < 16);
|
|
used_regs[reg] = true;
|
|
return fmt::format("vs_in_reg{}", reg);
|
|
};
|
|
|
|
const auto get_output_reg = [&](u32 reg) -> std::string {
|
|
ASSERT(reg < 16);
|
|
if (config.state.output_map[reg] < config.state.num_outputs) {
|
|
return fmt::format("vs_out_attr{}", config.state.output_map[reg]);
|
|
}
|
|
return "";
|
|
};
|
|
|
|
auto program_source_opt = ShaderDecompiler::DecompileProgram(
|
|
setup.program_code, setup.swizzle_data, config.state.main_offset, get_input_reg,
|
|
get_output_reg, config.state.sanitize_mul);
|
|
|
|
if (!program_source_opt)
|
|
return std::nullopt;
|
|
|
|
std::string& program_source = program_source_opt->code;
|
|
|
|
out += R"(
|
|
#define uniforms vs_uniforms
|
|
layout (std140) uniform vs_config {
|
|
pica_uniforms uniforms;
|
|
};
|
|
|
|
)";
|
|
// input attributes declaration
|
|
for (std::size_t i = 0; i < used_regs.size(); ++i) {
|
|
if (used_regs[i]) {
|
|
out += fmt::format("layout(location = {0}) in vec4 vs_in_reg{0};\n", i);
|
|
}
|
|
}
|
|
out += '\n';
|
|
|
|
// output attributes declaration
|
|
for (u32 i = 0; i < config.state.num_outputs; ++i) {
|
|
out += (separable_shader ? "layout(location = " + std::to_string(i) + ")" : std::string{}) +
|
|
" out vec4 vs_out_attr" + std::to_string(i) + ";\n";
|
|
}
|
|
|
|
out += "\nvoid main() {\n";
|
|
for (u32 i = 0; i < config.state.num_outputs; ++i) {
|
|
out += fmt::format(" vs_out_attr{} = vec4(0.0, 0.0, 0.0, 1.0);\n", i);
|
|
}
|
|
out += "\n exec_shader();\n}\n\n";
|
|
|
|
out += program_source;
|
|
|
|
return {{std::move(out)}};
|
|
}
|
|
|
|
static std::string GetGSCommonSource(const PicaGSConfigCommonRaw& config, bool separable_shader) {
|
|
std::string out = GetVertexInterfaceDeclaration(true, separable_shader);
|
|
out += UniformBlockDef;
|
|
out += ShaderDecompiler::GetCommonDeclarations();
|
|
|
|
out += '\n';
|
|
for (u32 i = 0; i < config.vs_output_attributes; ++i) {
|
|
out += (separable_shader ? "layout(location = " + std::to_string(i) + ")" : std::string{}) +
|
|
" in vec4 vs_out_attr" + std::to_string(i) + "[];\n";
|
|
}
|
|
|
|
out += R"(
|
|
struct Vertex {
|
|
)";
|
|
out += fmt::format(" vec4 attributes[{}];\n", config.gs_output_attributes);
|
|
out += "};\n\n";
|
|
|
|
const auto semantic = [&config](VSOutputAttributes::Semantic slot_semantic) -> std::string {
|
|
const u32 slot = static_cast<u32>(slot_semantic);
|
|
const u32 attrib = config.semantic_maps[slot].attribute_index;
|
|
const u32 comp = config.semantic_maps[slot].component_index;
|
|
if (attrib < config.gs_output_attributes) {
|
|
return fmt::format("vtx.attributes[{}].{}", attrib, "xyzw"[comp]);
|
|
}
|
|
return "0.0";
|
|
};
|
|
|
|
out += "vec4 GetVertexQuaternion(Vertex vtx) {\n";
|
|
out += " return vec4(" + semantic(VSOutputAttributes::QUATERNION_X) + ", " +
|
|
semantic(VSOutputAttributes::QUATERNION_Y) + ", " +
|
|
semantic(VSOutputAttributes::QUATERNION_Z) + ", " +
|
|
semantic(VSOutputAttributes::QUATERNION_W) + ");\n";
|
|
out += "}\n\n";
|
|
|
|
out += "void EmitVtx(Vertex vtx, bool quats_opposite) {\n";
|
|
out += " vec4 vtx_pos = vec4(" + semantic(VSOutputAttributes::POSITION_X) + ", " +
|
|
semantic(VSOutputAttributes::POSITION_Y) + ", " +
|
|
semantic(VSOutputAttributes::POSITION_Z) + ", " +
|
|
semantic(VSOutputAttributes::POSITION_W) + ");\n";
|
|
out += " gl_Position = vtx_pos;\n";
|
|
out += "#if !defined(CITRA_GLES) || defined(GL_EXT_clip_cull_distance)\n";
|
|
out += " gl_ClipDistance[0] = -vtx_pos.z;\n"; // fixed PICA clipping plane z <= 0
|
|
out += " gl_ClipDistance[1] = dot(clip_coef, vtx_pos);\n";
|
|
out += "#endif // !defined(CITRA_GLES) || defined(GL_EXT_clip_cull_distance)\n\n";
|
|
|
|
out += " vec4 vtx_quat = GetVertexQuaternion(vtx);\n";
|
|
out += " normquat = mix(vtx_quat, -vtx_quat, bvec4(quats_opposite));\n\n";
|
|
|
|
out += " vec4 vtx_color = vec4(" + semantic(VSOutputAttributes::COLOR_R) + ", " +
|
|
semantic(VSOutputAttributes::COLOR_G) + ", " + semantic(VSOutputAttributes::COLOR_B) +
|
|
", " + semantic(VSOutputAttributes::COLOR_A) + ");\n";
|
|
out += " primary_color = min(abs(vtx_color), vec4(1.0));\n\n";
|
|
|
|
out += " texcoord0 = vec2(" + semantic(VSOutputAttributes::TEXCOORD0_U) + ", " +
|
|
semantic(VSOutputAttributes::TEXCOORD0_V) + ");\n";
|
|
out += " texcoord1 = vec2(" + semantic(VSOutputAttributes::TEXCOORD1_U) + ", " +
|
|
semantic(VSOutputAttributes::TEXCOORD1_V) + ");\n\n";
|
|
|
|
out += " texcoord0_w = " + semantic(VSOutputAttributes::TEXCOORD0_W) + ";\n";
|
|
out += " view = vec3(" + semantic(VSOutputAttributes::VIEW_X) + ", " +
|
|
semantic(VSOutputAttributes::VIEW_Y) + ", " + semantic(VSOutputAttributes::VIEW_Z) +
|
|
");\n\n";
|
|
|
|
out += " texcoord2 = vec2(" + semantic(VSOutputAttributes::TEXCOORD2_U) + ", " +
|
|
semantic(VSOutputAttributes::TEXCOORD2_V) + ");\n\n";
|
|
|
|
out += " EmitVertex();\n";
|
|
out += "}\n";
|
|
|
|
out += R"(
|
|
bool AreQuaternionsOpposite(vec4 qa, vec4 qb) {
|
|
return (dot(qa, qb) < 0.0);
|
|
}
|
|
|
|
void EmitPrim(Vertex vtx0, Vertex vtx1, Vertex vtx2) {
|
|
EmitVtx(vtx0, false);
|
|
EmitVtx(vtx1, AreQuaternionsOpposite(GetVertexQuaternion(vtx0), GetVertexQuaternion(vtx1)));
|
|
EmitVtx(vtx2, AreQuaternionsOpposite(GetVertexQuaternion(vtx0), GetVertexQuaternion(vtx2)));
|
|
EndPrimitive();
|
|
}
|
|
)";
|
|
|
|
return out;
|
|
};
|
|
|
|
ShaderDecompiler::ProgramResult GenerateFixedGeometryShader(const PicaFixedGSConfig& config,
|
|
bool separable_shader) {
|
|
std::string out;
|
|
if (separable_shader && !GLES) {
|
|
out += "#extension GL_ARB_separate_shader_objects : enable\n\n";
|
|
}
|
|
|
|
out += R"(
|
|
layout(triangles) in;
|
|
layout(triangle_strip, max_vertices = 3) out;
|
|
|
|
)";
|
|
|
|
out += GetGSCommonSource(config.state, separable_shader);
|
|
|
|
out += R"(
|
|
void main() {
|
|
Vertex prim_buffer[3];
|
|
)";
|
|
for (u32 vtx = 0; vtx < 3; ++vtx) {
|
|
out += fmt::format(" prim_buffer[{}].attributes = vec4[{}](", vtx,
|
|
config.state.gs_output_attributes);
|
|
for (u32 i = 0; i < config.state.vs_output_attributes; ++i) {
|
|
out += fmt::format("{}vs_out_attr{}[{}]", i == 0 ? "" : ", ", i, vtx);
|
|
}
|
|
out += ");\n";
|
|
}
|
|
out += " EmitPrim(prim_buffer[0], prim_buffer[1], prim_buffer[2]);\n";
|
|
out += "}\n";
|
|
|
|
return {std::move(out)};
|
|
}
|
|
} // namespace OpenGL
|