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gl_rasterizer: Use MMH3 hash for shader cache hey.

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- Includes a check to confirm no hash collisions.
This commit is contained in:
bunnei
2015-10-09 22:46:47 -04:00
parent 71edb55114
commit 240a3b80d9
5 changed files with 64 additions and 102 deletions
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18
src/common/common_funcs.h
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@@ -4,9 +4,6 @@
#pragma once
#include <cstddef>
#include <functional>
#include "common_types.h"
#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
@@ -98,18 +95,3 @@ inline u64 _rotr64(u64 x, unsigned int shift){
// This function might change the error code.
// Defined in Misc.cpp.
const char* GetLastErrorMsg();
template <typename T>
inline std::size_t hash(const T& o) {
return std::hash<T>()(o);
}
template <typename T>
inline std::size_t combine_hash(const T& o) {
return hash(o);
}
template <typename T, typename... Args>
inline std::size_t combine_hash(const T& o, const Args&... args) {
return hash(o) * 3 + combine_hash(args...);
}

7
src/video_core/renderer_opengl/gl_rasterizer.cpp
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@@ -461,7 +461,8 @@ void RasterizerOpenGL::ReconfigureDepthTexture(DepthTextureInfo& texture, Pica::
}
void RasterizerOpenGL::SetShader() {
ShaderCacheKey config = ShaderCacheKey::CurrentConfig();
PicaShaderConfig config = PicaShaderConfig::CurrentConfig();
std::unique_ptr<PicaShader> shader = Common::make_unique<PicaShader>();
// Find (or generate) the GLSL shader for the current TEV state
auto cached_shader = shader_cache.find(config);
@@ -471,9 +472,7 @@ void RasterizerOpenGL::SetShader() {
state.draw.shader_program = current_shader->shader.handle;
state.Apply();
} else {
LOG_DEBUG(Render_OpenGL, "Creating new shader: %08X", hash(config));
std::unique_ptr<TEVShader> shader = Common::make_unique<TEVShader>();
LOG_DEBUG(Render_OpenGL, "Creating new shader");
shader->shader.Create(GLShader::GenerateVertexShader().c_str(), GLShader::GenerateFragmentShader(config).c_str());

135
src/video_core/renderer_opengl/gl_rasterizer.h
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@@ -5,11 +5,13 @@
#pragma once
#include <cstddef>
#include <cstring>
#include <memory>
#include <vector>
#include <unordered_map>
#include "common/common_types.h"
#include "common/hash.h"
#include "video_core/pica.h"
#include "video_core/hwrasterizer_base.h"
@@ -25,16 +27,52 @@
* Pica state is not being captured in the shader cache key, thereby resulting in (what should be)
* two separate shaders sharing the same key.
*/
struct ShaderCacheKey {
using Regs = Pica::Regs;
struct PicaShaderConfig {
/// Construct a PicaShaderConfig with the current Pica register configuration.
static PicaShaderConfig CurrentConfig() {
PicaShaderConfig res;
const auto& regs = Pica::g_state.regs;
bool operator ==(const ShaderCacheKey& o) const {
return hash(*this) == hash(o);
};
res.alpha_test_func = regs.output_merger.alpha_test.enable ?
regs.output_merger.alpha_test.func.Value() : Pica::Regs::CompareFunc::Always;
Regs::CompareFunc alpha_test_func;
std::array<Regs::TevStageConfig, 6> tev_stages = {};
u8 combiner_buffer_input;
// Copy relevant TevStageConfig fields only. We're doing this manually (instead of calling
// the GetTevStages() function) because BitField explicitly disables copies.
res.tev_stages[0].sources_raw = regs.tev_stage0.sources_raw;
res.tev_stages[1].sources_raw = regs.tev_stage1.sources_raw;
res.tev_stages[2].sources_raw = regs.tev_stage2.sources_raw;
res.tev_stages[3].sources_raw = regs.tev_stage3.sources_raw;
res.tev_stages[4].sources_raw = regs.tev_stage4.sources_raw;
res.tev_stages[5].sources_raw = regs.tev_stage5.sources_raw;
res.tev_stages[0].modifiers_raw = regs.tev_stage0.modifiers_raw;
res.tev_stages[1].modifiers_raw = regs.tev_stage1.modifiers_raw;
res.tev_stages[2].modifiers_raw = regs.tev_stage2.modifiers_raw;
res.tev_stages[3].modifiers_raw = regs.tev_stage3.modifiers_raw;
res.tev_stages[4].modifiers_raw = regs.tev_stage4.modifiers_raw;
res.tev_stages[5].modifiers_raw = regs.tev_stage5.modifiers_raw;
res.tev_stages[0].ops_raw = regs.tev_stage0.ops_raw;
res.tev_stages[1].ops_raw = regs.tev_stage1.ops_raw;
res.tev_stages[2].ops_raw = regs.tev_stage2.ops_raw;
res.tev_stages[3].ops_raw = regs.tev_stage3.ops_raw;
res.tev_stages[4].ops_raw = regs.tev_stage4.ops_raw;
res.tev_stages[5].ops_raw = regs.tev_stage5.ops_raw;
res.tev_stages[0].scales_raw = regs.tev_stage0.scales_raw;
res.tev_stages[1].scales_raw = regs.tev_stage1.scales_raw;
res.tev_stages[2].scales_raw = regs.tev_stage2.scales_raw;
res.tev_stages[3].scales_raw = regs.tev_stage3.scales_raw;
res.tev_stages[4].scales_raw = regs.tev_stage4.scales_raw;
res.tev_stages[5].scales_raw = regs.tev_stage5.scales_raw;
res.combiner_buffer_input =
regs.tev_combiner_buffer_input.update_mask_rgb.Value() |
regs.tev_combiner_buffer_input.update_mask_a.Value() << 4;
return res;
}
bool TevStageUpdatesCombinerBufferColor(unsigned stage_index) const {
return (stage_index < 4) && (combiner_buffer_input & (1 << stage_index));
@@ -44,78 +82,21 @@ struct ShaderCacheKey {
return (stage_index < 4) && ((combiner_buffer_input >> 4) & (1 << stage_index));
}
/**
* This function is used to construct a ShaderCacheKey with the current Pica register
* configuration. Don't construct a ShaderCacheKey manually, instead call this function (and
* extend it as additional state needs to be captured to generate shaders).
*/
static ShaderCacheKey CurrentConfig() {
const auto& regs = Pica::g_state.regs;
ShaderCacheKey config;
bool operator ==(const PicaShaderConfig& o) const {
return std::memcmp(this, &o, sizeof(PicaShaderConfig)) == 0;
};
config.alpha_test_func = regs.output_merger.alpha_test.enable ?
regs.output_merger.alpha_test.func.Value() : Pica::Regs::CompareFunc::Always;
// Copy relevant TevStageConfig fields only. We're doing this manually (instead of calling
// the GetTevStages() function) because BitField explicitly disables copies.
config.tev_stages[0].source_raw = regs.tev_stage0.source_raw;
config.tev_stages[1].source_raw = regs.tev_stage1.source_raw;
config.tev_stages[2].source_raw = regs.tev_stage2.source_raw;
config.tev_stages[3].source_raw = regs.tev_stage3.source_raw;
config.tev_stages[4].source_raw = regs.tev_stage4.source_raw;
config.tev_stages[5].source_raw = regs.tev_stage5.source_raw;
config.tev_stages[0].modifier_raw = regs.tev_stage0.modifier_raw;
config.tev_stages[1].modifier_raw = regs.tev_stage1.modifier_raw;
config.tev_stages[2].modifier_raw = regs.tev_stage2.modifier_raw;
config.tev_stages[3].modifier_raw = regs.tev_stage3.modifier_raw;
config.tev_stages[4].modifier_raw = regs.tev_stage4.modifier_raw;
config.tev_stages[5].modifier_raw = regs.tev_stage5.modifier_raw;
config.tev_stages[0].op_raw = regs.tev_stage0.op_raw;
config.tev_stages[1].op_raw = regs.tev_stage1.op_raw;
config.tev_stages[2].op_raw = regs.tev_stage2.op_raw;
config.tev_stages[3].op_raw = regs.tev_stage3.op_raw;
config.tev_stages[4].op_raw = regs.tev_stage4.op_raw;
config.tev_stages[5].op_raw = regs.tev_stage5.op_raw;
config.tev_stages[0].scale_raw = regs.tev_stage0.scale_raw;
config.tev_stages[1].scale_raw = regs.tev_stage1.scale_raw;
config.tev_stages[2].scale_raw = regs.tev_stage2.scale_raw;
config.tev_stages[3].scale_raw = regs.tev_stage3.scale_raw;
config.tev_stages[4].scale_raw = regs.tev_stage4.scale_raw;
config.tev_stages[5].scale_raw = regs.tev_stage5.scale_raw;
config.combiner_buffer_input =
regs.tev_combiner_buffer_input.update_mask_rgb.Value() |
regs.tev_combiner_buffer_input.update_mask_a.Value() << 4;
return config;
}
Pica::Regs::CompareFunc alpha_test_func;
std::array<Pica::Regs::TevStageConfig, 6> tev_stages = {};
u8 combiner_buffer_input;
};
namespace std {
template<> struct hash<::Pica::Regs::CompareFunc> {
std::size_t operator()(const ::Pica::Regs::CompareFunc& o) {
return ::hash((unsigned)o);
}
};
template<> struct hash<::Pica::Regs::TevStageConfig> {
std::size_t operator()(const ::Pica::Regs::TevStageConfig& o) {
return ::combine_hash(
::hash(o.source_raw), ::hash(o.modifier_raw),
::hash(o.op_raw), ::hash(o.scale_raw));
}
};
template<> struct hash<::ShaderCacheKey> {
std::size_t operator()(const ::ShaderCacheKey& o) const {
return ::combine_hash(o.alpha_test_func, o.combiner_buffer_input,
o.tev_stages[0], o.tev_stages[1], o.tev_stages[2],
o.tev_stages[3], o.tev_stages[4], o.tev_stages[5]);
template <>
struct hash<PicaShaderConfig> {
std::size_t operator()(const PicaShaderConfig& k) const {
return Common::ComputeHash64(&k, sizeof(PicaShaderConfig));
}
};
@@ -314,8 +295,8 @@ private:
TextureInfo fb_color_texture;
DepthTextureInfo fb_depth_texture;
std::unordered_map<ShaderCacheKey, std::unique_ptr<TEVShader>> shader_cache;
const TEVShader* current_shader = nullptr;
std::unordered_map<PicaShaderConfig, std::unique_ptr<PicaShader>> shader_cache;
const PicaShader* current_shader = nullptr;
OGLVertexArray vertex_array;
OGLBuffer vertex_buffer;

4
src/video_core/renderer_opengl/gl_shader_gen.cpp
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@@ -278,7 +278,7 @@ static void AppendAlphaTestCondition(std::string& out, Regs::CompareFunc func) {
}
/// Writes the code to emulate the specified TEV stage
static void WriteTevStage(std::string& out, const ShaderCacheKey& config, unsigned index) {
static void WriteTevStage(std::string& out, const PicaShaderConfig& config, unsigned index) {
auto& stage = config.tev_stages[index];
if (!IsPassThroughTevStage(stage)) {
std::string index_name = std::to_string(index);
@@ -319,7 +319,7 @@ static void WriteTevStage(std::string& out, const ShaderCacheKey& config, unsign
out += "g_combiner_buffer.a = g_last_tex_env_out.a;\n";
}
std::string GenerateFragmentShader(const ShaderCacheKey& config) {
std::string GenerateFragmentShader(const PicaShaderConfig& config) {
std::string out = R"(
#version 330
#extension GL_ARB_explicit_uniform_location : require

2
src/video_core/renderer_opengl/gl_shader_gen.h
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@@ -22,6 +22,6 @@ std::string GenerateVertexShader();
* configuration (NOTE: Use state in this struct only, not the Pica registers!)
* @returns String of the shader source code
*/
std::string GenerateFragmentShader(const ShaderCacheKey& config);
std::string GenerateFragmentShader(const PicaShaderConfig& config);
} // namespace GLShader