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gl_device: Reserve base bindings on limited devices

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SSBOs and other resources are limited per pipeline on Intel and AMD.
Heuristically reserve resources per stage having in mind the reported
OpenGL limits.
This commit is contained in:
ReinUsesLisp 2019-11-22 21:22:01 -03:00
parent e3d7334be9
commit dc2e83fa31
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GPG key ID: 2DFC508897B39CFE
1 changed files with 76 additions and 36 deletions
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112
src/video_core/renderer_opengl/gl_device.cpp
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@ -5,7 +5,9 @@
#include <algorithm>
#include <array>
#include <cstddef>
#include <optional>
#include <vector>
#include <glad/glad.h>
#include "common/logging/log.h"
@ -20,6 +22,27 @@ namespace {
// One uniform block is reserved for emulation purposes
constexpr u32 ReservedUniformBlocks = 1;
constexpr u32 NumStages = 5;
constexpr std::array LimitUBOs = {GL_MAX_VERTEX_UNIFORM_BLOCKS, GL_MAX_TESS_CONTROL_UNIFORM_BLOCKS,
GL_MAX_TESS_EVALUATION_UNIFORM_BLOCKS,
GL_MAX_GEOMETRY_UNIFORM_BLOCKS, GL_MAX_FRAGMENT_UNIFORM_BLOCKS};
constexpr std::array LimitSSBOs = {
GL_MAX_VERTEX_SHADER_STORAGE_BLOCKS, GL_MAX_TESS_CONTROL_SHADER_STORAGE_BLOCKS,
GL_MAX_TESS_EVALUATION_SHADER_STORAGE_BLOCKS, GL_MAX_GEOMETRY_SHADER_STORAGE_BLOCKS,
GL_MAX_FRAGMENT_SHADER_STORAGE_BLOCKS};
constexpr std::array LimitSamplers = {
GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS, GL_MAX_TESS_CONTROL_TEXTURE_IMAGE_UNITS,
GL_MAX_TESS_EVALUATION_TEXTURE_IMAGE_UNITS, GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS,
GL_MAX_TEXTURE_IMAGE_UNITS};
constexpr std::array LimitImages = {GL_MAX_VERTEX_IMAGE_UNIFORMS,
GL_MAX_TESS_CONTROL_IMAGE_UNIFORMS,
GL_MAX_TESS_EVALUATION_IMAGE_UNIFORMS,
GL_MAX_GEOMETRY_IMAGE_UNIFORMS, GL_MAX_FRAGMENT_IMAGE_UNIFORMS};
template <typename T>
T GetInteger(GLenum pname) {
GLint temporary;
@ -51,54 +74,71 @@ bool HasExtension(const std::vector<std::string_view>& images, std::string_view
return std::find(images.begin(), images.end(), extension) != images.end();
}
constexpr Device::BaseBindings operator+(Device::BaseBindings lhs, Device::BaseBindings rhs) {
return Device::BaseBindings{lhs.uniform_buffer + rhs.uniform_buffer,
lhs.shader_storage_buffer + rhs.shader_storage_buffer,
lhs.sampler + rhs.sampler, lhs.image + rhs.image};
u32 Extract(u32& base, u32& num, u32 amount, std::optional<GLenum> limit = {}) {
ASSERT(num >= amount);
if (limit) {
amount = std::min(amount, GetInteger<u32>(*limit));
}
num -= amount;
return std::exchange(base, base + amount);
}
Device::BaseBindings BuildBaseBindings(GLenum uniform_blocks, GLenum shader_storage_blocks,
GLenum texture_image_units, GLenum image_uniforms) noexcept {
return Device::BaseBindings{
GetInteger<u32>(uniform_blocks) - ReservedUniformBlocks,
GetInteger<u32>(shader_storage_blocks),
GetInteger<u32>(texture_image_units),
GetInteger<u32>(image_uniforms),
};
std::array<Device::BaseBindings, Tegra::Engines::MaxShaderTypes> BuildBaseBindings() noexcept {
std::array<Device::BaseBindings, Tegra::Engines::MaxShaderTypes> bindings;
static std::array<std::size_t, 5> stage_swizzle = {0, 1, 2, 3, 4};
const u32 total_ubos = GetInteger<u32>(GL_MAX_UNIFORM_BUFFER_BINDINGS);
const u32 total_ssbos = GetInteger<u32>(GL_MAX_SHADER_STORAGE_BUFFER_BINDINGS);
const u32 total_samplers = GetInteger<u32>(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS);
u32 num_ubos = total_ubos - ReservedUniformBlocks;
u32 num_ssbos = total_ssbos;
u32 num_samplers = total_samplers;
u32 base_ubo = ReservedUniformBlocks;
u32 base_ssbo = 0;
u32 base_samplers = 0;
for (std::size_t i = 0; i < NumStages; ++i) {
const std::size_t stage = stage_swizzle[i];
bindings[stage] = {
Extract(base_ubo, num_ubos, total_ubos / NumStages, LimitUBOs[stage]),
Extract(base_ssbo, num_ssbos, total_ssbos / NumStages, LimitSSBOs[stage]),
Extract(base_samplers, num_samplers, total_samplers / NumStages, LimitSamplers[stage])};
}
u32 num_images = GetInteger<u32>(GL_MAX_IMAGE_UNITS);
u32 base_images = 0;
// Reserve more image bindings on fragment and vertex stages.
bindings[4].image =
Extract(base_images, num_images, num_images / NumStages + 2, LimitImages[4]);
bindings[0].image =
Extract(base_images, num_images, num_images / NumStages + 1, LimitImages[0]);
// Reserve the other image bindings.
const u32 total_extracted_images = num_images / (NumStages - 2);
for (std::size_t i = 2; i < NumStages; ++i) {
const std::size_t stage = stage_swizzle[i];
bindings[stage].image =
Extract(base_images, num_images, total_extracted_images, LimitImages[stage]);
}
// Compute doesn't care about any of this.
bindings[5] = {0, 0, 0, 0};
return bindings;
}
} // Anonymous namespace
Device::Device() {
Device::Device() : base_bindings{BuildBaseBindings()} {
const std::string_view vendor = reinterpret_cast<const char*>(glGetString(GL_VENDOR));
const std::vector extensions = GetExtensions();
const bool is_nvidia = vendor == "NVIDIA Corporation";
const bool is_intel = vendor == "Intel";
// Reserve the first UBO for emulation bindings
base_bindings[0] = BaseBindings{ReservedUniformBlocks, 0, 0, 0};
base_bindings[1] = base_bindings[0] + BuildBaseBindings(GL_MAX_VERTEX_UNIFORM_BLOCKS,
GL_MAX_VERTEX_SHADER_STORAGE_BLOCKS,
GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS,
GL_MAX_VERTEX_IMAGE_UNIFORMS);
base_bindings[2] =
base_bindings[1] + BuildBaseBindings(GL_MAX_TESS_CONTROL_UNIFORM_BLOCKS,
GL_MAX_TESS_CONTROL_SHADER_STORAGE_BLOCKS,
GL_MAX_TESS_CONTROL_TEXTURE_IMAGE_UNITS,
GL_MAX_TESS_CONTROL_IMAGE_UNIFORMS);
base_bindings[3] =
base_bindings[2] + BuildBaseBindings(GL_MAX_TESS_EVALUATION_UNIFORM_BLOCKS,
GL_MAX_TESS_EVALUATION_SHADER_STORAGE_BLOCKS,
GL_MAX_TESS_EVALUATION_TEXTURE_IMAGE_UNITS,
GL_MAX_TESS_EVALUATION_IMAGE_UNIFORMS);
base_bindings[4] = base_bindings[3] + BuildBaseBindings(GL_MAX_GEOMETRY_UNIFORM_BLOCKS,
GL_MAX_GEOMETRY_SHADER_STORAGE_BLOCKS,
GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS,
GL_MAX_GEOMETRY_IMAGE_UNIFORMS);
// Compute doesn't need any of that
base_bindings[5] = BaseBindings{0, 0, 0, 0};
uniform_buffer_alignment = GetInteger<std::size_t>(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT);
shader_storage_alignment = GetInteger<std::size_t>(GL_SHADER_STORAGE_BUFFER_OFFSET_ALIGNMENT);
max_vertex_attributes = GetInteger<u32>(GL_MAX_VERTEX_ATTRIBS);