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Merge pull request #1187 from bunnei/shader-gen

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GLSL Fragment Shader Generation
This commit is contained in:
bunnei 2015-10-21 22:36:27 -04:00
commit 4195d9b3f8
12 changed files with 689 additions and 631 deletions
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3
src/video_core/CMakeLists.txt
View file

@ -1,6 +1,7 @@
set(SRCS
renderer_opengl/gl_rasterizer.cpp
renderer_opengl/gl_rasterizer_cache.cpp
renderer_opengl/gl_shader_gen.cpp
renderer_opengl/gl_shader_util.cpp
renderer_opengl/gl_state.cpp
renderer_opengl/renderer_opengl.cpp
@ -21,8 +22,8 @@ set(HEADERS
renderer_opengl/gl_rasterizer.h
renderer_opengl/gl_rasterizer_cache.h
renderer_opengl/gl_resource_manager.h
renderer_opengl/gl_shader_gen.h
renderer_opengl/gl_shader_util.h
renderer_opengl/gl_shaders.h
renderer_opengl/gl_state.h
renderer_opengl/pica_to_gl.h
renderer_opengl/renderer_opengl.h

4
src/video_core/pica.h
View file

@ -317,6 +317,7 @@ struct Regs {
};
union {
u32 sources_raw;
BitField< 0, 4, Source> color_source1;
BitField< 4, 4, Source> color_source2;
BitField< 8, 4, Source> color_source3;
@ -326,6 +327,7 @@ struct Regs {
};
union {
u32 modifiers_raw;
BitField< 0, 4, ColorModifier> color_modifier1;
BitField< 4, 4, ColorModifier> color_modifier2;
BitField< 8, 4, ColorModifier> color_modifier3;
@ -335,6 +337,7 @@ struct Regs {
};
union {
u32 ops_raw;
BitField< 0, 4, Operation> color_op;
BitField<16, 4, Operation> alpha_op;
};
@ -348,6 +351,7 @@ struct Regs {
};
union {
u32 scales_raw;
BitField< 0, 2, u32> color_scale;
BitField<16, 2, u32> alpha_scale;
};

335
src/video_core/renderer_opengl/gl_rasterizer.cpp
View file

@ -8,6 +8,8 @@
#include <glad/glad.h>
#include "common/color.h"
#include "common/file_util.h"
#include "common/make_unique.h"
#include "common/math_util.h"
#include "common/microprofile.h"
#include "common/profiler.h"
@ -19,7 +21,7 @@
#include "video_core/pica.h"
#include "video_core/utils.h"
#include "video_core/renderer_opengl/gl_rasterizer.h"
#include "video_core/renderer_opengl/gl_shaders.h"
#include "video_core/renderer_opengl/gl_shader_gen.h"
#include "video_core/renderer_opengl/gl_shader_util.h"
#include "video_core/renderer_opengl/pica_to_gl.h"
@ -38,36 +40,6 @@ RasterizerOpenGL::RasterizerOpenGL() : last_fb_color_addr(0), last_fb_depth_addr
RasterizerOpenGL::~RasterizerOpenGL() { }
void RasterizerOpenGL::InitObjects() {
// Create the hardware shader program and get attrib/uniform locations
shader.Create(GLShaders::g_vertex_shader_hw, GLShaders::g_fragment_shader_hw);
attrib_position = glGetAttribLocation(shader.handle, "vert_position");
attrib_color = glGetAttribLocation(shader.handle, "vert_color");
attrib_texcoords = glGetAttribLocation(shader.handle, "vert_texcoords");
uniform_alphatest_enabled = glGetUniformLocation(shader.handle, "alphatest_enabled");
uniform_alphatest_func = glGetUniformLocation(shader.handle, "alphatest_func");
uniform_alphatest_ref = glGetUniformLocation(shader.handle, "alphatest_ref");
uniform_tex = glGetUniformLocation(shader.handle, "tex");
uniform_tev_combiner_buffer_color = glGetUniformLocation(shader.handle, "tev_combiner_buffer_color");
const auto tev_stages = Pica::g_state.regs.GetTevStages();
for (unsigned tev_stage_index = 0; tev_stage_index < tev_stages.size(); ++tev_stage_index) {
auto& uniform_tev_cfg = uniform_tev_cfgs[tev_stage_index];
std::string tev_ref_str = "tev_cfgs[" + std::to_string(tev_stage_index) + "]";
uniform_tev_cfg.enabled = glGetUniformLocation(shader.handle, (tev_ref_str + ".enabled").c_str());
uniform_tev_cfg.color_sources = glGetUniformLocation(shader.handle, (tev_ref_str + ".color_sources").c_str());
uniform_tev_cfg.alpha_sources = glGetUniformLocation(shader.handle, (tev_ref_str + ".alpha_sources").c_str());
uniform_tev_cfg.color_modifiers = glGetUniformLocation(shader.handle, (tev_ref_str + ".color_modifiers").c_str());
uniform_tev_cfg.alpha_modifiers = glGetUniformLocation(shader.handle, (tev_ref_str + ".alpha_modifiers").c_str());
uniform_tev_cfg.color_alpha_op = glGetUniformLocation(shader.handle, (tev_ref_str + ".color_alpha_op").c_str());
uniform_tev_cfg.color_alpha_multiplier = glGetUniformLocation(shader.handle, (tev_ref_str + ".color_alpha_multiplier").c_str());
uniform_tev_cfg.const_color = glGetUniformLocation(shader.handle, (tev_ref_str + ".const_color").c_str());
uniform_tev_cfg.updates_combiner_buffer_color_alpha = glGetUniformLocation(shader.handle, (tev_ref_str + ".updates_combiner_buffer_color_alpha").c_str());
}
// Create sampler objects
for (size_t i = 0; i < texture_samplers.size(); ++i) {
texture_samplers[i].Create();
@ -78,29 +50,25 @@ void RasterizerOpenGL::InitObjects() {
vertex_buffer.Create();
vertex_array.Create();
// Update OpenGL state
state.draw.vertex_array = vertex_array.handle;
state.draw.vertex_buffer = vertex_buffer.handle;
state.draw.shader_program = shader.handle;
state.Apply();
// Set the texture samplers to correspond to different texture units
glUniform1i(uniform_tex, 0);
glUniform1i(uniform_tex + 1, 1);
glUniform1i(uniform_tex + 2, 2);
// Set vertex attributes
glVertexAttribPointer(attrib_position, 4, GL_FLOAT, GL_FALSE, sizeof(HardwareVertex), (GLvoid*)offsetof(HardwareVertex, position));
glVertexAttribPointer(attrib_color, 4, GL_FLOAT, GL_FALSE, sizeof(HardwareVertex), (GLvoid*)offsetof(HardwareVertex, color));
glVertexAttribPointer(attrib_texcoords, 2, GL_FLOAT, GL_FALSE, sizeof(HardwareVertex), (GLvoid*)offsetof(HardwareVertex, tex_coord0));
glVertexAttribPointer(attrib_texcoords + 1, 2, GL_FLOAT, GL_FALSE, sizeof(HardwareVertex), (GLvoid*)offsetof(HardwareVertex, tex_coord1));
glVertexAttribPointer(attrib_texcoords + 2, 2, GL_FLOAT, GL_FALSE, sizeof(HardwareVertex), (GLvoid*)offsetof(HardwareVertex, tex_coord2));
glEnableVertexAttribArray(attrib_position);
glEnableVertexAttribArray(attrib_color);
glEnableVertexAttribArray(attrib_texcoords);
glEnableVertexAttribArray(attrib_texcoords + 1);
glEnableVertexAttribArray(attrib_texcoords + 2);
glVertexAttribPointer(GLShader::ATTRIBUTE_POSITION, 4, GL_FLOAT, GL_FALSE, sizeof(HardwareVertex), (GLvoid*)offsetof(HardwareVertex, position));
glEnableVertexAttribArray(GLShader::ATTRIBUTE_POSITION);
glVertexAttribPointer(GLShader::ATTRIBUTE_COLOR, 4, GL_FLOAT, GL_FALSE, sizeof(HardwareVertex), (GLvoid*)offsetof(HardwareVertex, color));
glEnableVertexAttribArray(GLShader::ATTRIBUTE_COLOR);
glVertexAttribPointer(GLShader::ATTRIBUTE_TEXCOORD0, 2, GL_FLOAT, GL_FALSE, sizeof(HardwareVertex), (GLvoid*)offsetof(HardwareVertex, tex_coord0));
glVertexAttribPointer(GLShader::ATTRIBUTE_TEXCOORD1, 2, GL_FLOAT, GL_FALSE, sizeof(HardwareVertex), (GLvoid*)offsetof(HardwareVertex, tex_coord1));
glVertexAttribPointer(GLShader::ATTRIBUTE_TEXCOORD2, 2, GL_FLOAT, GL_FALSE, sizeof(HardwareVertex), (GLvoid*)offsetof(HardwareVertex, tex_coord2));
glEnableVertexAttribArray(GLShader::ATTRIBUTE_TEXCOORD0);
glEnableVertexAttribArray(GLShader::ATTRIBUTE_TEXCOORD1);
glEnableVertexAttribArray(GLShader::ATTRIBUTE_TEXCOORD2);
SetShader();
// Create textures for OGL framebuffer that will be rendered to, initially 1x1 to succeed in framebuffer creation
fb_color_texture.texture.Create();
@ -150,61 +118,15 @@ void RasterizerOpenGL::InitObjects() {
}
void RasterizerOpenGL::Reset() {
const auto& regs = Pica::g_state.regs;
SyncCullMode();
SyncBlendEnabled();
SyncBlendFuncs();
SyncBlendColor();
SyncAlphaTest();
SyncLogicOp();
SyncStencilTest();
SyncDepthTest();
// TEV stage 0
SyncTevSources(0, regs.tev_stage0);
SyncTevModifiers(0, regs.tev_stage0);
SyncTevOps(0, regs.tev_stage0);
SyncTevColor(0, regs.tev_stage0);
SyncTevMultipliers(0, regs.tev_stage0);
// TEV stage 1
SyncTevSources(1, regs.tev_stage1);
SyncTevModifiers(1, regs.tev_stage1);
SyncTevOps(1, regs.tev_stage1);
SyncTevColor(1, regs.tev_stage1);
SyncTevMultipliers(1, regs.tev_stage1);
// TEV stage 2
SyncTevSources(2, regs.tev_stage2);
SyncTevModifiers(2, regs.tev_stage2);
SyncTevOps(2, regs.tev_stage2);
SyncTevColor(2, regs.tev_stage2);
SyncTevMultipliers(2, regs.tev_stage2);
// TEV stage 3
SyncTevSources(3, regs.tev_stage3);
SyncTevModifiers(3, regs.tev_stage3);
SyncTevOps(3, regs.tev_stage3);
SyncTevColor(3, regs.tev_stage3);
SyncTevMultipliers(3, regs.tev_stage3);
// TEV stage 4
SyncTevSources(4, regs.tev_stage4);
SyncTevModifiers(4, regs.tev_stage4);
SyncTevOps(4, regs.tev_stage4);
SyncTevColor(4, regs.tev_stage4);
SyncTevMultipliers(4, regs.tev_stage4);
// TEV stage 5
SyncTevSources(5, regs.tev_stage5);
SyncTevModifiers(5, regs.tev_stage5);
SyncTevOps(5, regs.tev_stage5);
SyncTevColor(5, regs.tev_stage5);
SyncTevMultipliers(5, regs.tev_stage5);
SyncCombinerColor();
SyncCombinerWriteFlags();
SetShader();
res_cache.FullFlush();
}
@ -221,6 +143,11 @@ void RasterizerOpenGL::DrawTriangles() {
SyncFramebuffer();
SyncDrawState();
if (state.draw.shader_dirty) {
SetShader();
state.draw.shader_dirty = false;
}
glBufferData(GL_ARRAY_BUFFER, vertex_batch.size() * sizeof(HardwareVertex), vertex_batch.data(), GL_STREAM_DRAW);
glDrawArrays(GL_TRIANGLES, 0, (GLsizei)vertex_batch.size());
@ -272,6 +199,7 @@ void RasterizerOpenGL::NotifyPicaRegisterChanged(u32 id) {
// Alpha test
case PICA_REG_INDEX(output_merger.alpha_test):
SyncAlphaTest();
state.draw.shader_dirty = true;
break;
// Stencil test
@ -290,117 +218,57 @@ void RasterizerOpenGL::NotifyPicaRegisterChanged(u32 id) {
SyncLogicOp();
break;
// TEV stage 0
// TEV stages
case PICA_REG_INDEX(tev_stage0.color_source1):
SyncTevSources(0, regs.tev_stage0);
break;
case PICA_REG_INDEX(tev_stage0.color_modifier1):
SyncTevModifiers(0, regs.tev_stage0);
break;
case PICA_REG_INDEX(tev_stage0.color_op):
SyncTevOps(0, regs.tev_stage0);
case PICA_REG_INDEX(tev_stage0.color_scale):
case PICA_REG_INDEX(tev_stage1.color_source1):
case PICA_REG_INDEX(tev_stage1.color_modifier1):
case PICA_REG_INDEX(tev_stage1.color_op):
case PICA_REG_INDEX(tev_stage1.color_scale):
case PICA_REG_INDEX(tev_stage2.color_source1):
case PICA_REG_INDEX(tev_stage2.color_modifier1):
case PICA_REG_INDEX(tev_stage2.color_op):
case PICA_REG_INDEX(tev_stage2.color_scale):
case PICA_REG_INDEX(tev_stage3.color_source1):
case PICA_REG_INDEX(tev_stage3.color_modifier1):
case PICA_REG_INDEX(tev_stage3.color_op):
case PICA_REG_INDEX(tev_stage3.color_scale):
case PICA_REG_INDEX(tev_stage4.color_source1):
case PICA_REG_INDEX(tev_stage4.color_modifier1):
case PICA_REG_INDEX(tev_stage4.color_op):
case PICA_REG_INDEX(tev_stage4.color_scale):
case PICA_REG_INDEX(tev_stage5.color_source1):
case PICA_REG_INDEX(tev_stage5.color_modifier1):
case PICA_REG_INDEX(tev_stage5.color_op):
case PICA_REG_INDEX(tev_stage5.color_scale):
case PICA_REG_INDEX(tev_combiner_buffer_input):
state.draw.shader_dirty = true;
break;
case PICA_REG_INDEX(tev_stage0.const_r):
SyncTevColor(0, regs.tev_stage0);
break;
case PICA_REG_INDEX(tev_stage0.color_scale):
SyncTevMultipliers(0, regs.tev_stage0);
break;
// TEV stage 1
case PICA_REG_INDEX(tev_stage1.color_source1):
SyncTevSources(1, regs.tev_stage1);
break;
case PICA_REG_INDEX(tev_stage1.color_modifier1):
SyncTevModifiers(1, regs.tev_stage1);
break;
case PICA_REG_INDEX(tev_stage1.color_op):
SyncTevOps(1, regs.tev_stage1);
SyncTevConstColor(0, regs.tev_stage0);
break;
case PICA_REG_INDEX(tev_stage1.const_r):
SyncTevColor(1, regs.tev_stage1);
break;
case PICA_REG_INDEX(tev_stage1.color_scale):
SyncTevMultipliers(1, regs.tev_stage1);
break;
// TEV stage 2
case PICA_REG_INDEX(tev_stage2.color_source1):
SyncTevSources(2, regs.tev_stage2);
break;
case PICA_REG_INDEX(tev_stage2.color_modifier1):
SyncTevModifiers(2, regs.tev_stage2);
break;
case PICA_REG_INDEX(tev_stage2.color_op):
SyncTevOps(2, regs.tev_stage2);
SyncTevConstColor(1, regs.tev_stage1);
break;
case PICA_REG_INDEX(tev_stage2.const_r):
SyncTevColor(2, regs.tev_stage2);
break;
case PICA_REG_INDEX(tev_stage2.color_scale):
SyncTevMultipliers(2, regs.tev_stage2);
break;
// TEV stage 3
case PICA_REG_INDEX(tev_stage3.color_source1):
SyncTevSources(3, regs.tev_stage3);
break;
case PICA_REG_INDEX(tev_stage3.color_modifier1):
SyncTevModifiers(3, regs.tev_stage3);
break;
case PICA_REG_INDEX(tev_stage3.color_op):
SyncTevOps(3, regs.tev_stage3);
SyncTevConstColor(2, regs.tev_stage2);
break;
case PICA_REG_INDEX(tev_stage3.const_r):
SyncTevColor(3, regs.tev_stage3);
break;
case PICA_REG_INDEX(tev_stage3.color_scale):
SyncTevMultipliers(3, regs.tev_stage3);
break;
// TEV stage 4
case PICA_REG_INDEX(tev_stage4.color_source1):
SyncTevSources(4, regs.tev_stage4);
break;
case PICA_REG_INDEX(tev_stage4.color_modifier1):
SyncTevModifiers(4, regs.tev_stage4);
break;
case PICA_REG_INDEX(tev_stage4.color_op):
SyncTevOps(4, regs.tev_stage4);
SyncTevConstColor(3, regs.tev_stage3);
break;
case PICA_REG_INDEX(tev_stage4.const_r):
SyncTevColor(4, regs.tev_stage4);
break;
case PICA_REG_INDEX(tev_stage4.color_scale):
SyncTevMultipliers(4, regs.tev_stage4);
break;
// TEV stage 5
case PICA_REG_INDEX(tev_stage5.color_source1):
SyncTevSources(5, regs.tev_stage5);
break;
case PICA_REG_INDEX(tev_stage5.color_modifier1):
SyncTevModifiers(5, regs.tev_stage5);
break;
case PICA_REG_INDEX(tev_stage5.color_op):
SyncTevOps(5, regs.tev_stage5);
SyncTevConstColor(4, regs.tev_stage4);
break;
case PICA_REG_INDEX(tev_stage5.const_r):
SyncTevColor(5, regs.tev_stage5);
break;
case PICA_REG_INDEX(tev_stage5.color_scale):
SyncTevMultipliers(5, regs.tev_stage5);
SyncTevConstColor(5, regs.tev_stage5);
break;
// TEV combiner buffer color
case PICA_REG_INDEX(tev_combiner_buffer_color):
SyncCombinerColor();
break;
// TEV combiner buffer write flags
case PICA_REG_INDEX(tev_combiner_buffer_input):
SyncCombinerWriteFlags();
break;
}
}
@ -592,6 +460,41 @@ void RasterizerOpenGL::ReconfigureDepthTexture(DepthTextureInfo& texture, Pica::
state.Apply();
}
void RasterizerOpenGL::SetShader() {
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);
if (cached_shader != shader_cache.end()) {
current_shader = cached_shader->second.get();
state.draw.shader_program = current_shader->shader.handle;
state.Apply();
} else {
LOG_DEBUG(Render_OpenGL, "Creating new shader");
shader->shader.Create(GLShader::GenerateVertexShader().c_str(), GLShader::GenerateFragmentShader(config).c_str());
state.draw.shader_program = shader->shader.handle;
state.Apply();
// Set the texture samplers to correspond to different texture units
glUniform1i(PicaShader::Uniform::Texture0, 0);
glUniform1i(PicaShader::Uniform::Texture1, 1);
glUniform1i(PicaShader::Uniform::Texture2, 2);
current_shader = shader_cache.emplace(config, std::move(shader)).first->second.get();
}
// Update uniforms
SyncAlphaTest();
SyncCombinerColor();
auto& tev_stages = Pica::g_state.regs.GetTevStages();
for (int index = 0; index < tev_stages.size(); ++index)
SyncTevConstColor(index, tev_stages[index]);
}
void RasterizerOpenGL::SyncFramebuffer() {
const auto& regs = Pica::g_state.regs;
@ -712,9 +615,7 @@ void RasterizerOpenGL::SyncBlendColor() {
void RasterizerOpenGL::SyncAlphaTest() {
const auto& regs = Pica::g_state.regs;
glUniform1i(uniform_alphatest_enabled, regs.output_merger.alpha_test.enable);
glUniform1i(uniform_alphatest_func, (GLint)regs.output_merger.alpha_test.func.Value());
glUniform1f(uniform_alphatest_ref, regs.output_merger.alpha_test.ref / 255.0f);
glUniform1i(PicaShader::Uniform::AlphaTestRef, regs.output_merger.alpha_test.ref);
}
void RasterizerOpenGL::SyncLogicOp() {
@ -744,56 +645,14 @@ void RasterizerOpenGL::SyncDepthTest() {
state.depth.write_mask = regs.output_merger.depth_write_enable ? GL_TRUE : GL_FALSE;
}
void RasterizerOpenGL::SyncTevSources(unsigned stage_index, const Pica::Regs::TevStageConfig& config) {
GLint color_srcs[3] = { (GLint)config.color_source1.Value(),
(GLint)config.color_source2.Value(),
(GLint)config.color_source3.Value() };
GLint alpha_srcs[3] = { (GLint)config.alpha_source1.Value(),
(GLint)config.alpha_source2.Value(),
(GLint)config.alpha_source3.Value() };
glUniform3iv(uniform_tev_cfgs[stage_index].color_sources, 1, color_srcs);
glUniform3iv(uniform_tev_cfgs[stage_index].alpha_sources, 1, alpha_srcs);
}
void RasterizerOpenGL::SyncTevModifiers(unsigned stage_index, const Pica::Regs::TevStageConfig& config) {
GLint color_mods[3] = { (GLint)config.color_modifier1.Value(),
(GLint)config.color_modifier2.Value(),
(GLint)config.color_modifier3.Value() };
GLint alpha_mods[3] = { (GLint)config.alpha_modifier1.Value(),
(GLint)config.alpha_modifier2.Value(),
(GLint)config.alpha_modifier3.Value() };
glUniform3iv(uniform_tev_cfgs[stage_index].color_modifiers, 1, color_mods);
glUniform3iv(uniform_tev_cfgs[stage_index].alpha_modifiers, 1, alpha_mods);
}
void RasterizerOpenGL::SyncTevOps(unsigned stage_index, const Pica::Regs::TevStageConfig& config) {
glUniform2i(uniform_tev_cfgs[stage_index].color_alpha_op, (GLint)config.color_op.Value(), (GLint)config.alpha_op.Value());
}
void RasterizerOpenGL::SyncTevColor(unsigned stage_index, const Pica::Regs::TevStageConfig& config) {
auto const_color = PicaToGL::ColorRGBA8(config.const_color);
glUniform4fv(uniform_tev_cfgs[stage_index].const_color, 1, const_color.data());
}
void RasterizerOpenGL::SyncTevMultipliers(unsigned stage_index, const Pica::Regs::TevStageConfig& config) {
glUniform2i(uniform_tev_cfgs[stage_index].color_alpha_multiplier, config.GetColorMultiplier(), config.GetAlphaMultiplier());
}
void RasterizerOpenGL::SyncCombinerColor() {
auto combiner_color = PicaToGL::ColorRGBA8(Pica::g_state.regs.tev_combiner_buffer_color.raw);
glUniform4fv(uniform_tev_combiner_buffer_color, 1, combiner_color.data());
glUniform4fv(PicaShader::Uniform::TevCombinerBufferColor, 1, combiner_color.data());
}
void RasterizerOpenGL::SyncCombinerWriteFlags() {
const auto& regs = Pica::g_state.regs;
const auto tev_stages = regs.GetTevStages();
for (unsigned tev_stage_index = 0; tev_stage_index < tev_stages.size(); ++tev_stage_index) {
glUniform2i(uniform_tev_cfgs[tev_stage_index].updates_combiner_buffer_color_alpha,
regs.tev_combiner_buffer_input.TevStageUpdatesCombinerBufferColor(tev_stage_index),
regs.tev_combiner_buffer_input.TevStageUpdatesCombinerBufferAlpha(tev_stage_index));
}
void RasterizerOpenGL::SyncTevConstColor(int stage_index, const Pica::Regs::TevStageConfig& tev_stage) {
auto const_color = PicaToGL::ColorRGBA8(tev_stage.const_color);
glUniform4fv(PicaShader::Uniform::TevConstColors + stage_index, 1, const_color.data());
}
void RasterizerOpenGL::SyncDrawState() {
@ -824,12 +683,6 @@ void RasterizerOpenGL::SyncDrawState() {
}
}
// Skip processing TEV stages that simply pass the previous stage results through
const auto tev_stages = regs.GetTevStages();
for (unsigned tev_stage_index = 0; tev_stage_index < tev_stages.size(); ++tev_stage_index) {
glUniform1i(uniform_tev_cfgs[tev_stage_index].enabled, !IsPassThroughTevStage(tev_stages[tev_stage_index]));
}
state.Apply();
}

157
src/video_core/renderer_opengl/gl_rasterizer.h
View file

@ -4,15 +4,104 @@
#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"
#include "video_core/renderer_opengl/gl_rasterizer_cache.h"
#include "video_core/renderer_opengl/gl_state.h"
#include "video_core/shader/shader_interpreter.h"
/**
* This struct contains all state used to generate the GLSL shader program that emulates the current
* Pica register configuration. This struct is used as a cache key for generated GLSL shader
* programs. The functions in gl_shader_gen.cpp should retrieve state from this struct only, not by
* directly accessing Pica registers. This should reduce the risk of bugs in shader generation where
* 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 PicaShaderConfig {
/// Construct a PicaShaderConfig with the current Pica register configuration.
static PicaShaderConfig CurrentConfig() {
PicaShaderConfig res;
const auto& regs = Pica::g_state.regs;
res.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.
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));
}
bool TevStageUpdatesCombinerBufferAlpha(unsigned stage_index) const {
return (stage_index < 4) && ((combiner_buffer_input >> 4) & (1 << stage_index));
}
bool operator ==(const PicaShaderConfig& o) const {
return std::memcmp(this, &o, sizeof(PicaShaderConfig)) == 0;
};
Pica::Regs::CompareFunc alpha_test_func;
std::array<Pica::Regs::TevStageConfig, 6> tev_stages = {};
u8 combiner_buffer_input;
};
namespace std {
template <>
struct hash<PicaShaderConfig> {
size_t operator()(const PicaShaderConfig& k) const {
return Common::ComputeHash64(&k, sizeof(PicaShaderConfig));
}
};
} // namespace std
class RasterizerOpenGL : public HWRasterizer {
public:
@ -45,20 +134,24 @@ public:
/// Notify rasterizer that a 3DS memory region has been changed
void NotifyFlush(PAddr addr, u32 size) override;
private:
/// Structure used for managing texture environment states
struct TEVConfigUniforms {
GLuint enabled;
GLuint color_sources;
GLuint alpha_sources;
GLuint color_modifiers;
GLuint alpha_modifiers;
GLuint color_alpha_op;
GLuint color_alpha_multiplier;
GLuint const_color;
GLuint updates_combiner_buffer_color_alpha;
/// OpenGL shader generated for a given Pica register state
struct PicaShader {
/// OpenGL shader resource
OGLShader shader;
/// Fragment shader uniforms
enum Uniform : GLuint {
AlphaTestRef = 0,
TevConstColors = 1,
Texture0 = 7,
Texture1 = 8,
Texture2 = 9,
TevCombinerBufferColor = 10,
};
};
private:
/// Structure used for storing information about color textures
struct TextureInfo {
OGLTexture texture;
@ -129,6 +222,9 @@ private:
/// Reconfigure the OpenGL depth texture to use the given format and dimensions
void ReconfigureDepthTexture(DepthTextureInfo& texture, Pica::Regs::DepthFormat format, u32 width, u32 height);
/// Sets the OpenGL shader in accordance with the current PICA register state
void SetShader();
/// Syncs the state and contents of the OpenGL framebuffer to match the current PICA framebuffer
void SyncFramebuffer();
@ -156,27 +252,12 @@ private:
/// Syncs the depth test states to match the PICA register
void SyncDepthTest();
/// Syncs the specified TEV stage's color and alpha sources to match the PICA register
void SyncTevSources(unsigned stage_index, const Pica::Regs::TevStageConfig& config);
/// Syncs the specified TEV stage's color and alpha modifiers to match the PICA register
void SyncTevModifiers(unsigned stage_index, const Pica::Regs::TevStageConfig& config);
/// Syncs the specified TEV stage's color and alpha combiner operations to match the PICA register
void SyncTevOps(unsigned stage_index, const Pica::Regs::TevStageConfig& config);
/// Syncs the specified TEV stage's constant color to match the PICA register
void SyncTevColor(unsigned stage_index, const Pica::Regs::TevStageConfig& config);
/// Syncs the specified TEV stage's color and alpha multipliers to match the PICA register
void SyncTevMultipliers(unsigned stage_index, const Pica::Regs::TevStageConfig& config);
/// Syncs the TEV constant color to match the PICA register
void SyncTevConstColor(int tev_index, const Pica::Regs::TevStageConfig& tev_stage);
/// Syncs the TEV combiner color buffer to match the PICA register
void SyncCombinerColor();
/// Syncs the TEV combiner write flags to match the PICA register
void SyncCombinerWriteFlags();
/// Syncs the remaining OpenGL drawing state to match the current PICA state
void SyncDrawState();
@ -213,21 +294,11 @@ private:
std::array<SamplerInfo, 3> texture_samplers;
TextureInfo fb_color_texture;
DepthTextureInfo fb_depth_texture;
OGLShader shader;
std::unordered_map<PicaShaderConfig, std::unique_ptr<PicaShader>> shader_cache;
const PicaShader* current_shader = nullptr;
OGLVertexArray vertex_array;
OGLBuffer vertex_buffer;
OGLFramebuffer framebuffer;
// Hardware vertex shader
GLuint attrib_position;
GLuint attrib_color;
GLuint attrib_texcoords;
// Hardware fragment shader
GLuint uniform_alphatest_enabled;
GLuint uniform_alphatest_func;
GLuint uniform_alphatest_ref;
GLuint uniform_tex;
GLuint uniform_tev_combiner_buffer_color;
TEVConfigUniforms uniform_tev_cfgs[6];
};

2
src/video_core/renderer_opengl/gl_resource_manager.h
View file

@ -71,7 +71,7 @@ public:
/// Creates a new internal OpenGL resource and stores the handle
void Create(const char* vert_shader, const char* frag_shader) {
if (handle != 0) return;
handle = ShaderUtil::LoadShaders(vert_shader, frag_shader);
handle = GLShader::LoadProgram(vert_shader, frag_shader);
}
/// Deletes the internal OpenGL resource

388
src/video_core/renderer_opengl/gl_shader_gen.cpp Normal file
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@ -0,0 +1,388 @@
// Copyright 2015 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "video_core/pica.h"
#include "video_core/renderer_opengl/gl_rasterizer.h"
#include "video_core/renderer_opengl/gl_shader_gen.h"
using Pica::Regs;
using TevStageConfig = Regs::TevStageConfig;
namespace GLShader {
/// Detects if a TEV stage is configured to be skipped (to avoid generating unnecessary code)
static bool IsPassThroughTevStage(const TevStageConfig& stage) {
return (stage.color_op == TevStageConfig::Operation::Replace &&
stage.alpha_op == TevStageConfig::Operation::Replace &&
stage.color_source1 == TevStageConfig::Source::Previous &&
stage.alpha_source1 == TevStageConfig::Source::Previous &&
stage.color_modifier1 == TevStageConfig::ColorModifier::SourceColor &&
stage.alpha_modifier1 == TevStageConfig::AlphaModifier::SourceAlpha &&
stage.GetColorMultiplier() == 1 &&
stage.GetAlphaMultiplier() == 1);
}
/// Writes the specified TEV stage source component(s)
static void AppendSource(std::string& out, TevStageConfig::Source source,
const std::string& index_name) {
using Source = TevStageConfig::Source;
switch (source) {
case Source::PrimaryColor:
out += "primary_color";
break;
case Source::PrimaryFragmentColor:
// HACK: Until we implement fragment lighting, use primary_color
out += "primary_color";
break;
case Source::SecondaryFragmentColor:
// HACK: Until we implement fragment lighting, use zero
out += "vec4(0.0)";
break;
case Source::Texture0:
out += "texture(tex[0], texcoord[0])";
break;
case Source::Texture1:
out += "texture(tex[1], texcoord[1])";
break;
case Source::Texture2:
out += "texture(tex[2], texcoord[2])";
break;
case Source::PreviousBuffer:
out += "combiner_buffer";
break;
case Source::Constant:
((out += "const_color[") += index_name) += ']';
break;
case Source::Previous:
out += "last_tex_env_out";
break;
default:
out += "vec4(0.0)";
LOG_CRITICAL(Render_OpenGL, "Unknown source op %u", source);
break;
}
}
/// Writes the color components to use for the specified TEV stage color modifier
static void AppendColorModifier(std::string& out, TevStageConfig::ColorModifier modifier,
TevStageConfig::Source source, const std::string& index_name) {
using ColorModifier = TevStageConfig::ColorModifier;
switch (modifier) {
case ColorModifier::SourceColor:
AppendSource(out, source, index_name);
out += ".rgb";
break;
case ColorModifier::OneMinusSourceColor:
out += "vec3(1.0) - ";
AppendSource(out, source, index_name);
out += ".rgb";
break;
case ColorModifier::SourceAlpha:
AppendSource(out, source, index_name);
out += ".aaa";
break;
case ColorModifier::OneMinusSourceAlpha:
out += "vec3(1.0) - ";
AppendSource(out, source, index_name);
out += ".aaa";
break;
case ColorModifier::SourceRed:
AppendSource(out, source, index_name);
out += ".rrr";
break;
case ColorModifier::OneMinusSourceRed:
out += "vec3(1.0) - ";
AppendSource(out, source, index_name);
out += ".rrr";
break;
case ColorModifier::SourceGreen:
AppendSource(out, source, index_name);
out += ".ggg";
break;
case ColorModifier::OneMinusSourceGreen:
out += "vec3(1.0) - ";
AppendSource(out, source, index_name);
out += ".ggg";
break;
case ColorModifier::SourceBlue:
AppendSource(out, source, index_name);
out += ".bbb";
break;
case ColorModifier::OneMinusSourceBlue:
out += "vec3(1.0) - ";
AppendSource(out, source, index_name);
out += ".bbb";
break;
default:
out += "vec3(0.0)";
LOG_CRITICAL(Render_OpenGL, "Unknown color modifier op %u", modifier);
break;
}
}
/// Writes the alpha component to use for the specified TEV stage alpha modifier
static void AppendAlphaModifier(std::string& out, TevStageConfig::AlphaModifier modifier,
TevStageConfig::Source source, const std::string& index_name) {
using AlphaModifier = TevStageConfig::AlphaModifier;
switch (modifier) {
case AlphaModifier::SourceAlpha:
AppendSource(out, source, index_name);
out += ".a";
break;
case AlphaModifier::OneMinusSourceAlpha:
out += "1.0 - ";
AppendSource(out, source, index_name);
out += ".a";
break;
case AlphaModifier::SourceRed:
AppendSource(out, source, index_name);
out += ".r";
break;
case AlphaModifier::OneMinusSourceRed:
out += "1.0 - ";
AppendSource(out, source, index_name);
out += ".r";
break;
case AlphaModifier::SourceGreen:
AppendSource(out, source, index_name);
out += ".g";
break;
case AlphaModifier::OneMinusSourceGreen:
out += "1.0 - ";
AppendSource(out, source, index_name);
out += ".g";
break;
case AlphaModifier::SourceBlue:
AppendSource(out, source, index_name);
out += ".b";
break;
case AlphaModifier::OneMinusSourceBlue:
out += "1.0 - ";
AppendSource(out, source, index_name);
out += ".b";
break;
default:
out += "0.0";
LOG_CRITICAL(Render_OpenGL, "Unknown alpha modifier op %u", 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,
const std::string& variable_name) {
out += "clamp(";
using Operation = TevStageConfig::Operation;
switch (operation) {
case Operation::Replace:
out += variable_name + "[0]";
break;
case Operation::Modulate:
out += variable_name + "[0] * " + variable_name + "[1]";
break;
case Operation::Add:
out += variable_name + "[0] + " + variable_name + "[1]";
break;
case Operation::AddSigned:
out += variable_name + "[0] + " + variable_name + "[1] - vec3(0.5)";
break;
case Operation::Lerp:
// TODO(bunnei): Verify if HW actually does this per-component, otherwise we can just use builtin lerp
out += variable_name + "[0] * " + variable_name + "[2] + " + variable_name + "[1] * (vec3(1.0) - " + variable_name + "[2])";
break;
case Operation::Subtract:
out += variable_name + "[0] - " + variable_name + "[1]";
break;
case Operation::MultiplyThenAdd:
out += variable_name + "[0] * " + variable_name + "[1] + " + variable_name + "[2]";
break;
case Operation::AddThenMultiply:
out += "min(" + variable_name + "[0] + " + variable_name + "[1], vec3(1.0)) * " + variable_name + "[2]";
break;
default:
out += "vec3(0.0)";
LOG_CRITICAL(Render_OpenGL, "Unknown color combiner operation: %u", 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,
const std::string& variable_name) {
out += "clamp(";
using Operation = TevStageConfig::Operation;
switch (operation) {
case Operation::Replace:
out += variable_name + "[0]";
break;
case Operation::Modulate:
out += variable_name + "[0] * " + variable_name + "[1]";
break;
case Operation::Add:
out += variable_name + "[0] + " + variable_name + "[1]";
break;
case Operation::AddSigned:
out += variable_name + "[0] + " + variable_name + "[1] - 0.5";
break;
case Operation::Lerp:
out += variable_name + "[0] * " + variable_name + "[2] + " + variable_name + "[1] * (1.0 - " + variable_name + "[2])";
break;
case Operation::Subtract:
out += variable_name + "[0] - " + variable_name + "[1]";
break;
case Operation::MultiplyThenAdd:
out += variable_name + "[0] * " + variable_name + "[1] + " + variable_name + "[2]";
break;
case Operation::AddThenMultiply:
out += "min(" + variable_name + "[0] + " + variable_name + "[1], 1.0) * " + variable_name + "[2]";
break;
default:
out += "0.0";
LOG_CRITICAL(Render_OpenGL, "Unknown alpha combiner operation: %u", operation);
break;
}
out += ", 0.0, 1.0)";
}
/// Writes the if-statement condition used to evaluate alpha testing
static void AppendAlphaTestCondition(std::string& out, Regs::CompareFunc func) {
using CompareFunc = Regs::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 const char* op[] = { "!=", "==", ">=", ">", "<=", "<", };
unsigned index = (unsigned)func - (unsigned)CompareFunc::Equal;
out += "int(last_tex_env_out.a * 255.0f) " + std::string(op[index]) + " alphatest_ref";
break;
}
default:
out += "false";
LOG_CRITICAL(Render_OpenGL, "Unknown alpha test condition %u", func);
break;
}
}
/// Writes the code to emulate the specified TEV stage
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);
out += "vec3 color_results_" + index_name + "[3] = vec3[3](";
AppendColorModifier(out, stage.color_modifier1, stage.color_source1, index_name);
out += ", ";
AppendColorModifier(out, stage.color_modifier2, stage.color_source2, index_name);
out += ", ";
AppendColorModifier(out, stage.color_modifier3, stage.color_source3, index_name);
out += ");\n";
out += "vec3 color_output_" + index_name + " = ";
AppendColorCombiner(out, stage.color_op, "color_results_" + index_name);
out += ";\n";
out += "float alpha_results_" + index_name + "[3] = float[3](";
AppendAlphaModifier(out, stage.alpha_modifier1, stage.alpha_source1, index_name);
out += ", ";
AppendAlphaModifier(out, stage.alpha_modifier2, stage.alpha_source2, index_name);
out += ", ";
AppendAlphaModifier(out, stage.alpha_modifier3, stage.alpha_source3, index_name);
out += ");\n";
out += "float alpha_output_" + index_name + " = ";
AppendAlphaCombiner(out, stage.alpha_op, "alpha_results_" + index_name);
out += ";\n";
out += "last_tex_env_out = vec4("
"clamp(color_output_" + index_name + " * " + std::to_string(stage.GetColorMultiplier()) + ".0, vec3(0.0), vec3(1.0)),"
"clamp(alpha_output_" + index_name + " * " + std::to_string(stage.GetAlphaMultiplier()) + ".0, 0.0, 1.0));\n";
}
if (config.TevStageUpdatesCombinerBufferColor(index))
out += "combiner_buffer.rgb = last_tex_env_out.rgb;\n";
if (config.TevStageUpdatesCombinerBufferAlpha(index))
out += "combiner_buffer.a = last_tex_env_out.a;\n";
}
std::string GenerateFragmentShader(const PicaShaderConfig& config) {
std::string out = R"(
#version 330
#extension GL_ARB_explicit_uniform_location : require
#define NUM_TEV_STAGES 6
in vec4 primary_color;
in vec2 texcoord[3];
out vec4 color;
)";
using Uniform = RasterizerOpenGL::PicaShader::Uniform;
out += "layout(location = " + std::to_string((int)Uniform::AlphaTestRef) + ") uniform int alphatest_ref;\n";
out += "layout(location = " + std::to_string((int)Uniform::TevConstColors) + ") uniform vec4 const_color[NUM_TEV_STAGES];\n";
out += "layout(location = " + std::to_string((int)Uniform::Texture0) + ") uniform sampler2D tex[3];\n";
out += "layout(location = " + std::to_string((int)Uniform::TevCombinerBufferColor) + ") uniform vec4 tev_combiner_buffer_color;\n";
out += "void main() {\n";
out += "vec4 combiner_buffer = tev_combiner_buffer_color;\n";
out += "vec4 last_tex_env_out = vec4(0.0);\n";
// Do not do any sort of processing if it's obvious we're not going to pass the alpha test
if (config.alpha_test_func == Regs::CompareFunc::Never) {
out += "discard; }";
return out;
}
for (size_t index = 0; index < config.tev_stages.size(); ++index)
WriteTevStage(out, config, (unsigned)index);
if (config.alpha_test_func != Regs::CompareFunc::Always) {
out += "if (";
AppendAlphaTestCondition(out, config.alpha_test_func);
out += ") discard;\n";
}
out += "color = last_tex_env_out;\n}";
return out;
}
std::string GenerateVertexShader() {
std::string out = "#version 330\n";
out += "layout(location = " + std::to_string((int)ATTRIBUTE_POSITION) + ") in vec4 vert_position;\n";
out += "layout(location = " + std::to_string((int)ATTRIBUTE_COLOR) + ") in vec4 vert_color;\n";
out += "layout(location = " + std::to_string((int)ATTRIBUTE_TEXCOORD0) + ") in vec2 vert_texcoord0;\n";
out += "layout(location = " + std::to_string((int)ATTRIBUTE_TEXCOORD1) + ") in vec2 vert_texcoord1;\n";
out += "layout(location = " + std::to_string((int)ATTRIBUTE_TEXCOORD2) + ") in vec2 vert_texcoord2;\n";
out += R"(
out vec4 primary_color;
out vec2 texcoord[3];
void main() {
primary_color = vert_color;
texcoord[0] = vert_texcoord0;
texcoord[1] = vert_texcoord1;
texcoord[2] = vert_texcoord2;
gl_Position = vec4(vert_position.x, -vert_position.y, -vert_position.z, vert_position.w);
}
)";
return out;
}
} // namespace GLShader

27
src/video_core/renderer_opengl/gl_shader_gen.h Normal file
View file

@ -0,0 +1,27 @@
// Copyright 2015 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <string>
#include "video_core/renderer_opengl/gl_rasterizer.h"
namespace GLShader {
/**
* Generates the GLSL vertex shader program source code for the current Pica state
* @returns String of the shader source code
*/
std::string GenerateVertexShader();
/**
* Generates the GLSL fragment shader program source code for the current Pica state
* @param config ShaderCacheKey object generated for the current Pica state, used for the shader
* configuration (NOTE: Use state in this struct only, not the Pica registers!)
* @returns String of the shader source code
*/
std::string GenerateFragmentShader(const PicaShaderConfig& config);
} // namespace GLShader

7
src/video_core/renderer_opengl/gl_shader_util.cpp
View file

@ -8,9 +8,9 @@
#include "common/logging/log.h"
#include "video_core/renderer_opengl/gl_shader_util.h"
namespace ShaderUtil {
namespace GLShader {
GLuint LoadShaders(const char* vertex_shader, const char* fragment_shader) {
GLuint LoadProgram(const char* vertex_shader, const char* fragment_shader) {
// Create the shaders
GLuint vertex_shader_id = glCreateShader(GL_VERTEX_SHADER);
@ -65,6 +65,7 @@ GLuint LoadShaders(const char* vertex_shader, const char* fragment_shader) {
GLuint program_id = glCreateProgram();
glAttachShader(program_id, vertex_shader_id);
glAttachShader(program_id, fragment_shader_id);
glLinkProgram(program_id);
// Check the program
@ -87,4 +88,4 @@ GLuint LoadShaders(const char* vertex_shader, const char* fragment_shader) {
return program_id;
}
}
} // namespace GLShader

20
src/video_core/renderer_opengl/gl_shader_util.h
View file

@ -6,8 +6,22 @@
#include <glad/glad.h>
namespace ShaderUtil {
namespace GLShader {
GLuint LoadShaders(const char* vertex_file_path, const char* fragment_file_path);
enum Attributes {
ATTRIBUTE_POSITION,
ATTRIBUTE_COLOR,
ATTRIBUTE_TEXCOORD0,
ATTRIBUTE_TEXCOORD1,
ATTRIBUTE_TEXCOORD2,
};
}
/**
* Utility function to create and compile an OpenGL GLSL shader program (vertex + fragment shader)
* @param vertex_shader String of the GLSL vertex shader program
* @param fragment_shader String of the GLSL fragment shader program
* @returns Handle of the newly created OpenGL shader object
*/
GLuint LoadProgram(const char* vertex_shader, const char* fragment_shader);
} // namespace

337
src/video_core/renderer_opengl/gl_shaders.h
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@ -1,337 +0,0 @@
// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
namespace GLShaders {
const char g_vertex_shader[] = R"(
#version 150 core
in vec2 vert_position;
in vec2 vert_tex_coord;
out vec2 frag_tex_coord;
// This is a truncated 3x3 matrix for 2D transformations:
// The upper-left 2x2 submatrix performs scaling/rotation/mirroring.
// The third column performs translation.
// The third row could be used for projection, which we don't need in 2D. It hence is assumed to
// implicitly be [0, 0, 1]
uniform mat3x2 modelview_matrix;
void main() {
// Multiply input position by the rotscale part of the matrix and then manually translate by
// the last column. This is equivalent to using a full 3x3 matrix and expanding the vector
// to `vec3(vert_position.xy, 1.0)`
gl_Position = vec4(mat2(modelview_matrix) * vert_position + modelview_matrix[2], 0.0, 1.0);
frag_tex_coord = vert_tex_coord;
}
)";
const char g_fragment_shader[] = R"(
#version 150 core
in vec2 frag_tex_coord;
out vec4 color;
uniform sampler2D color_texture;
void main() {
color = texture(color_texture, frag_tex_coord);
}
)";
const char g_vertex_shader_hw[] = R"(
#version 150 core
#define NUM_VTX_ATTR 7
in vec4 vert_position;
in vec4 vert_color;
in vec2 vert_texcoords[3];
out vec4 o[NUM_VTX_ATTR];
void main() {
o[2] = vert_color;
o[3] = vec4(vert_texcoords[0].xy, vert_texcoords[1].xy);
o[5] = vec4(0.0, 0.0, vert_texcoords[2].xy);
gl_Position = vec4(vert_position.x, -vert_position.y, -vert_position.z, vert_position.w);
}
)";
// TODO: Create a shader constructor and cache that builds this program with minimal conditionals instead of using tev_cfg uniforms
const char g_fragment_shader_hw[] = R"(
#version 150 core
#define NUM_VTX_ATTR 7
#define NUM_TEV_STAGES 6
#define SOURCE_PRIMARYCOLOR 0x0
#define SOURCE_PRIMARYFRAGMENTCOLOR 0x1
#define SOURCE_SECONDARYFRAGMENTCOLOR 0x2
#define SOURCE_TEXTURE0 0x3
#define SOURCE_TEXTURE1 0x4
#define SOURCE_TEXTURE2 0x5
#define SOURCE_TEXTURE3 0x6
#define SOURCE_PREVIOUSBUFFER 0xd
#define SOURCE_CONSTANT 0xe
#define SOURCE_PREVIOUS 0xf
#define COLORMODIFIER_SOURCECOLOR 0x0
#define COLORMODIFIER_ONEMINUSSOURCECOLOR 0x1
#define COLORMODIFIER_SOURCEALPHA 0x2
#define COLORMODIFIER_ONEMINUSSOURCEALPHA 0x3
#define COLORMODIFIER_SOURCERED 0x4
#define COLORMODIFIER_ONEMINUSSOURCERED 0x5
#define COLORMODIFIER_SOURCEGREEN 0x8
#define COLORMODIFIER_ONEMINUSSOURCEGREEN 0x9
#define COLORMODIFIER_SOURCEBLUE 0xc
#define COLORMODIFIER_ONEMINUSSOURCEBLUE 0xd
#define ALPHAMODIFIER_SOURCEALPHA 0x0
#define ALPHAMODIFIER_ONEMINUSSOURCEALPHA 0x1
#define ALPHAMODIFIER_SOURCERED 0x2
#define ALPHAMODIFIER_ONEMINUSSOURCERED 0x3
#define ALPHAMODIFIER_SOURCEGREEN 0x4
#define ALPHAMODIFIER_ONEMINUSSOURCEGREEN 0x5
#define ALPHAMODIFIER_SOURCEBLUE 0x6
#define ALPHAMODIFIER_ONEMINUSSOURCEBLUE 0x7
#define OPERATION_REPLACE 0
#define OPERATION_MODULATE 1
#define OPERATION_ADD 2
#define OPERATION_ADDSIGNED 3
#define OPERATION_LERP 4
#define OPERATION_SUBTRACT 5
#define OPERATION_MULTIPLYTHENADD 8
#define OPERATION_ADDTHENMULTIPLY 9
#define COMPAREFUNC_NEVER 0
#define COMPAREFUNC_ALWAYS 1
#define COMPAREFUNC_EQUAL 2
#define COMPAREFUNC_NOTEQUAL 3
#define COMPAREFUNC_LESSTHAN 4
#define COMPAREFUNC_LESSTHANOREQUAL 5
#define COMPAREFUNC_GREATERTHAN 6
#define COMPAREFUNC_GREATERTHANOREQUAL 7
in vec4 o[NUM_VTX_ATTR];
out vec4 color;
uniform bool alphatest_enabled;
uniform int alphatest_func;
uniform float alphatest_ref;
uniform sampler2D tex[3];
uniform vec4 tev_combiner_buffer_color;
struct TEVConfig
{
bool enabled;
ivec3 color_sources;
ivec3 alpha_sources;
ivec3 color_modifiers;
ivec3 alpha_modifiers;
ivec2 color_alpha_op;
ivec2 color_alpha_multiplier;
vec4 const_color;
bvec2 updates_combiner_buffer_color_alpha;
};
uniform TEVConfig tev_cfgs[NUM_TEV_STAGES];
vec4 g_combiner_buffer;
vec4 g_last_tex_env_out;
vec4 g_const_color;
vec4 GetSource(int source) {
if (source == SOURCE_PRIMARYCOLOR) {
return o[2];
} else if (source == SOURCE_PRIMARYFRAGMENTCOLOR) {
// HACK: Until we implement fragment lighting, use primary_color
return o[2];
} else if (source == SOURCE_SECONDARYFRAGMENTCOLOR) {
// HACK: Until we implement fragment lighting, use zero
return vec4(0.0, 0.0, 0.0, 0.0);
} else if (source == SOURCE_TEXTURE0) {
return texture(tex[0], o[3].xy);
} else if (source == SOURCE_TEXTURE1) {
return texture(tex[1], o[3].zw);
} else if (source == SOURCE_TEXTURE2) {
// TODO: Unverified
return texture(tex[2], o[5].zw);
} else if (source == SOURCE_TEXTURE3) {
// TODO: no 4th texture?
} else if (source == SOURCE_PREVIOUSBUFFER) {
return g_combiner_buffer;
} else if (source == SOURCE_CONSTANT) {
return g_const_color;
} else if (source == SOURCE_PREVIOUS) {
return g_last_tex_env_out;
}
return vec4(0.0);
}
vec3 GetColorModifier(int factor, vec4 color) {
if (factor == COLORMODIFIER_SOURCECOLOR) {
return color.rgb;
} else if (factor == COLORMODIFIER_ONEMINUSSOURCECOLOR) {
return vec3(1.0) - color.rgb;
} else if (factor == COLORMODIFIER_SOURCEALPHA) {
return color.aaa;
} else if (factor == COLORMODIFIER_ONEMINUSSOURCEALPHA) {
return vec3(1.0) - color.aaa;
} else if (factor == COLORMODIFIER_SOURCERED) {
return color.rrr;
} else if (factor == COLORMODIFIER_ONEMINUSSOURCERED) {
return vec3(1.0) - color.rrr;
} else if (factor == COLORMODIFIER_SOURCEGREEN) {
return color.ggg;
} else if (factor == COLORMODIFIER_ONEMINUSSOURCEGREEN) {
return vec3(1.0) - color.ggg;
} else if (factor == COLORMODIFIER_SOURCEBLUE) {
return color.bbb;
} else if (factor == COLORMODIFIER_ONEMINUSSOURCEBLUE) {
return vec3(1.0) - color.bbb;
}
return vec3(0.0);
}
float GetAlphaModifier(int factor, vec4 color) {
if (factor == ALPHAMODIFIER_SOURCEALPHA) {
return color.a;
} else if (factor == ALPHAMODIFIER_ONEMINUSSOURCEALPHA) {
return 1.0 - color.a;
} else if (factor == ALPHAMODIFIER_SOURCERED) {
return color.r;
} else if (factor == ALPHAMODIFIER_ONEMINUSSOURCERED) {
return 1.0 - color.r;
} else if (factor == ALPHAMODIFIER_SOURCEGREEN) {
return color.g;
} else if (factor == ALPHAMODIFIER_ONEMINUSSOURCEGREEN) {
return 1.0 - color.g;
} else if (factor == ALPHAMODIFIER_SOURCEBLUE) {
return color.b;
} else if (factor == ALPHAMODIFIER_ONEMINUSSOURCEBLUE) {
return 1.0 - color.b;
}
return 0.0;
}
vec3 ColorCombine(int op, vec3 color[3]) {
if (op == OPERATION_REPLACE) {
return color[0];
} else if (op == OPERATION_MODULATE) {
return color[0] * color[1];
} else if (op == OPERATION_ADD) {
return min(color[0] + color[1], 1.0);
} else if (op == OPERATION_ADDSIGNED) {
return clamp(color[0] + color[1] - vec3(0.5), 0.0, 1.0);
} else if (op == OPERATION_LERP) {
return color[0] * color[2] + color[1] * (vec3(1.0) - color[2]);
} else if (op == OPERATION_SUBTRACT) {
return max(color[0] - color[1], 0.0);
} else if (op == OPERATION_MULTIPLYTHENADD) {
return min(color[0] * color[1] + color[2], 1.0);
} else if (op == OPERATION_ADDTHENMULTIPLY) {
return min(color[0] + color[1], 1.0) * color[2];
}
return vec3(0.0);
}
float AlphaCombine(int op, float alpha[3]) {
if (op == OPERATION_REPLACE) {
return alpha[0];
} else if (op == OPERATION_MODULATE) {
return alpha[0] * alpha[1];
} else if (op == OPERATION_ADD) {
return min(alpha[0] + alpha[1], 1.0);
} else if (op == OPERATION_ADDSIGNED) {
return clamp(alpha[0] + alpha[1] - 0.5, 0.0, 1.0);
} else if (op == OPERATION_LERP) {
return alpha[0] * alpha[2] + alpha[1] * (1.0 - alpha[2]);
} else if (op == OPERATION_SUBTRACT) {
return max(alpha[0] - alpha[1], 0.0);
} else if (op == OPERATION_MULTIPLYTHENADD) {
return min(alpha[0] * alpha[1] + alpha[2], 1.0);
} else if (op == OPERATION_ADDTHENMULTIPLY) {
return min(alpha[0] + alpha[1], 1.0) * alpha[2];
}
return 0.0;
}
void main(void) {
g_combiner_buffer = tev_combiner_buffer_color;
for (int tex_env_idx = 0; tex_env_idx < NUM_TEV_STAGES; ++tex_env_idx) {
if (tev_cfgs[tex_env_idx].enabled) {
g_const_color = tev_cfgs[tex_env_idx].const_color;
vec3 color_results[3] = vec3[3](GetColorModifier(tev_cfgs[tex_env_idx].color_modifiers.x, GetSource(tev_cfgs[tex_env_idx].color_sources.x)),
GetColorModifier(tev_cfgs[tex_env_idx].color_modifiers.y, GetSource(tev_cfgs[tex_env_idx].color_sources.y)),
GetColorModifier(tev_cfgs[tex_env_idx].color_modifiers.z, GetSource(tev_cfgs[tex_env_idx].color_sources.z)));
vec3 color_output = ColorCombine(tev_cfgs[tex_env_idx].color_alpha_op.x, color_results);
float alpha_results[3] = float[3](GetAlphaModifier(tev_cfgs[tex_env_idx].alpha_modifiers.x, GetSource(tev_cfgs[tex_env_idx].alpha_sources.x)),
GetAlphaModifier(tev_cfgs[tex_env_idx].alpha_modifiers.y, GetSource(tev_cfgs[tex_env_idx].alpha_sources.y)),
GetAlphaModifier(tev_cfgs[tex_env_idx].alpha_modifiers.z, GetSource(tev_cfgs[tex_env_idx].alpha_sources.z)));
float alpha_output = AlphaCombine(tev_cfgs[tex_env_idx].color_alpha_op.y, alpha_results);
g_last_tex_env_out = vec4(min(color_output * tev_cfgs[tex_env_idx].color_alpha_multiplier.x, 1.0), min(alpha_output * tev_cfgs[tex_env_idx].color_alpha_multiplier.y, 1.0));
}
if (tev_cfgs[tex_env_idx].updates_combiner_buffer_color_alpha.x) {
g_combiner_buffer.rgb = g_last_tex_env_out.rgb;
}
if (tev_cfgs[tex_env_idx].updates_combiner_buffer_color_alpha.y) {
g_combiner_buffer.a = g_last_tex_env_out.a;
}
}
if (alphatest_enabled) {
if (alphatest_func == COMPAREFUNC_NEVER) {
discard;
} else if (alphatest_func == COMPAREFUNC_ALWAYS) {
} else if (alphatest_func == COMPAREFUNC_EQUAL) {
if (g_last_tex_env_out.a != alphatest_ref) {
discard;
}
} else if (alphatest_func == COMPAREFUNC_NOTEQUAL) {
if (g_last_tex_env_out.a == alphatest_ref) {
discard;
}
} else if (alphatest_func == COMPAREFUNC_LESSTHAN) {
if (g_last_tex_env_out.a >= alphatest_ref) {
discard;
}
} else if (alphatest_func == COMPAREFUNC_LESSTHANOREQUAL) {
if (g_last_tex_env_out.a > alphatest_ref) {
discard;
}
} else if (alphatest_func == COMPAREFUNC_GREATERTHAN) {
if (g_last_tex_env_out.a <= alphatest_ref) {
discard;
}
} else if (alphatest_func == COMPAREFUNC_GREATERTHANOREQUAL) {
if (g_last_tex_env_out.a < alphatest_ref) {
discard;
}
}
}
color = g_last_tex_env_out;
}
)";
}

1
src/video_core/renderer_opengl/gl_state.h
View file

@ -65,6 +65,7 @@ public:
GLuint vertex_array; // GL_VERTEX_ARRAY_BINDING
GLuint vertex_buffer; // GL_ARRAY_BUFFER_BINDING
GLuint shader_program; // GL_CURRENT_PROGRAM
bool shader_dirty;
} draw;
OpenGLState();

39
src/video_core/renderer_opengl/renderer_opengl.cpp
View file

@ -21,9 +21,44 @@
#include "video_core/debug_utils/debug_utils.h"
#include "video_core/renderer_opengl/gl_rasterizer.h"
#include "video_core/renderer_opengl/gl_shader_util.h"
#include "video_core/renderer_opengl/gl_shaders.h"
#include "video_core/renderer_opengl/renderer_opengl.h"
static const char vertex_shader[] = R"(
#version 150 core
in vec2 vert_position;
in vec2 vert_tex_coord;
out vec2 frag_tex_coord;
// This is a truncated 3x3 matrix for 2D transformations:
// The upper-left 2x2 submatrix performs scaling/rotation/mirroring.
// The third column performs translation.
// The third row could be used for projection, which we don't need in 2D. It hence is assumed to
// implicitly be [0, 0, 1]
uniform mat3x2 modelview_matrix;
void main() {
// Multiply input position by the rotscale part of the matrix and then manually translate by
// the last column. This is equivalent to using a full 3x3 matrix and expanding the vector
// to `vec3(vert_position.xy, 1.0)`
gl_Position = vec4(mat2(modelview_matrix) * vert_position + modelview_matrix[2], 0.0, 1.0);
frag_tex_coord = vert_tex_coord;
}
)";
static const char fragment_shader[] = R"(
#version 150 core
in vec2 frag_tex_coord;
out vec4 color;
uniform sampler2D color_texture;
void main() {
color = texture(color_texture, frag_tex_coord);
}
)";
/**
* Vertex structure that the drawn screen rectangles are composed of.
*/
@ -207,7 +242,7 @@ void RendererOpenGL::InitOpenGLObjects() {
glClearColor(Settings::values.bg_red, Settings::values.bg_green, Settings::values.bg_blue, 0.0f);
// Link shaders and get variable locations
program_id = ShaderUtil::LoadShaders(GLShaders::g_vertex_shader, GLShaders::g_fragment_shader);
program_id = GLShader::LoadProgram(vertex_shader, fragment_shader);
uniform_modelview_matrix = glGetUniformLocation(program_id, "modelview_matrix");
uniform_color_texture = glGetUniformLocation(program_id, "color_texture");
attrib_position = glGetAttribLocation(program_id, "vert_position");