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gl_shader_gen: Add additional function documentation.

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This commit is contained in:
bunnei 2015-10-06 18:21:28 -04:00
parent 2a0a86f629
commit 4b5141954e
2 changed files with 18 additions and 0 deletions
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8
src/video_core/renderer_opengl/gl_shader_gen.cpp
View file

@ -11,6 +11,7 @@ using TevStageConfig = Regs::TevStageConfig;
namespace GLShader { namespace GLShader {
/// Detects if a TEV stage is configured to be skipped (to avoid generating unnecessary code)
static bool IsPassThroughTevStage(const TevStageConfig& stage) { static bool IsPassThroughTevStage(const TevStageConfig& stage) {
return (stage.color_op == TevStageConfig::Operation::Replace && return (stage.color_op == TevStageConfig::Operation::Replace &&
stage.alpha_op == TevStageConfig::Operation::Replace && stage.alpha_op == TevStageConfig::Operation::Replace &&
@ -22,6 +23,7 @@ static bool IsPassThroughTevStage(const TevStageConfig& stage) {
stage.GetAlphaMultiplier() == 1); stage.GetAlphaMultiplier() == 1);
} }
/// Writes the specified TEV stage source component(s)
static void AppendSource(std::string& out, TevStageConfig::Source source, static void AppendSource(std::string& out, TevStageConfig::Source source,
const std::string& index_name) { const std::string& index_name) {
using Source = TevStageConfig::Source; using Source = TevStageConfig::Source;
@ -62,6 +64,7 @@ static void AppendSource(std::string& out, TevStageConfig::Source source,
} }
} }
/// Writes the color components to use for the specified TEV stage color modifier
static void AppendColorModifier(std::string& out, TevStageConfig::ColorModifier modifier, static void AppendColorModifier(std::string& out, TevStageConfig::ColorModifier modifier,
TevStageConfig::Source source, const std::string& index_name) { TevStageConfig::Source source, const std::string& index_name) {
using ColorModifier = TevStageConfig::ColorModifier; using ColorModifier = TevStageConfig::ColorModifier;
@ -118,6 +121,7 @@ static void AppendColorModifier(std::string& out, TevStageConfig::ColorModifier
} }
} }
/// Writes the alpha component to use for the specified TEV stage alpha modifier
static void AppendAlphaModifier(std::string& out, TevStageConfig::AlphaModifier modifier, static void AppendAlphaModifier(std::string& out, TevStageConfig::AlphaModifier modifier,
TevStageConfig::Source source, const std::string& index_name) { TevStageConfig::Source source, const std::string& index_name) {
using AlphaModifier = TevStageConfig::AlphaModifier; using AlphaModifier = TevStageConfig::AlphaModifier;
@ -165,6 +169,7 @@ static void AppendAlphaModifier(std::string& out, TevStageConfig::AlphaModifier
} }
} }
/// Writes the combiner function for the color components for the specified TEV stage operation
static void AppendColorCombiner(std::string& out, TevStageConfig::Operation operation, static void AppendColorCombiner(std::string& out, TevStageConfig::Operation operation,
const std::string& variable_name) { const std::string& variable_name) {
using Operation = TevStageConfig::Operation; using Operation = TevStageConfig::Operation;
@ -201,6 +206,7 @@ static void AppendColorCombiner(std::string& out, TevStageConfig::Operation oper
} }
} }
/// Writes the combiner function for the alpha component for the specified TEV stage operation
static void AppendAlphaCombiner(std::string& out, TevStageConfig::Operation operation, static void AppendAlphaCombiner(std::string& out, TevStageConfig::Operation operation,
const std::string& variable_name) { const std::string& variable_name) {
using Operation = TevStageConfig::Operation; using Operation = TevStageConfig::Operation;
@ -236,6 +242,7 @@ static void AppendAlphaCombiner(std::string& out, TevStageConfig::Operation oper
} }
} }
/// Writes the if-statement condition used to evaluate alpha testing
static void AppendAlphaTestCondition(std::string& out, Regs::CompareFunc func) { static void AppendAlphaTestCondition(std::string& out, Regs::CompareFunc func) {
using CompareFunc = Regs::CompareFunc; using CompareFunc = Regs::CompareFunc;
switch (func) { switch (func) {
@ -270,6 +277,7 @@ 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 ShaderCacheKey& config, unsigned index) {
auto& stage = config.tev_stages[index]; auto& stage = config.tev_stages[index];
if (!IsPassThroughTevStage(stage)) { if (!IsPassThroughTevStage(stage)) {

10
src/video_core/renderer_opengl/gl_shader_gen.h
View file

@ -10,8 +10,18 @@
namespace GLShader { 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(); 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 ShaderCacheKey& config); std::string GenerateFragmentShader(const ShaderCacheKey& config);
} // namespace GLShader } // namespace GLShader