gl_shader_gen: Add additional function documentation.
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@ -11,6 +11,7 @@ using TevStageConfig = Regs::TevStageConfig;
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namespace GLShader {
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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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@ -22,6 +23,7 @@ static bool IsPassThroughTevStage(const TevStageConfig& stage) {
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stage.GetAlphaMultiplier() == 1);
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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, TevStageConfig::Source source,
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const std::string& index_name) {
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using Source = TevStageConfig::Source;
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@ -62,6 +64,7 @@ static void AppendSource(std::string& out, TevStageConfig::Source source,
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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, TevStageConfig::ColorModifier modifier,
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TevStageConfig::Source source, const std::string& index_name) {
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using ColorModifier = TevStageConfig::ColorModifier;
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@ -118,6 +121,7 @@ static void AppendColorModifier(std::string& out, TevStageConfig::ColorModifier
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}
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}
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/// Writes the alpha component to use for the specified TEV stage alpha modifier
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static void AppendAlphaModifier(std::string& out, TevStageConfig::AlphaModifier modifier,
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TevStageConfig::Source source, const std::string& index_name) {
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using AlphaModifier = TevStageConfig::AlphaModifier;
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@ -165,6 +169,7 @@ static void AppendAlphaModifier(std::string& out, TevStageConfig::AlphaModifier
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}
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}
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/// Writes the combiner function for the color components for the specified TEV stage operation
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static void AppendColorCombiner(std::string& out, TevStageConfig::Operation operation,
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const std::string& variable_name) {
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using Operation = TevStageConfig::Operation;
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@ -201,6 +206,7 @@ static void AppendColorCombiner(std::string& out, TevStageConfig::Operation oper
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}
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}
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/// Writes the combiner function for the alpha component for the specified TEV stage operation
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static void AppendAlphaCombiner(std::string& out, TevStageConfig::Operation operation,
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const std::string& variable_name) {
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using Operation = TevStageConfig::Operation;
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@ -236,6 +242,7 @@ static void AppendAlphaCombiner(std::string& out, TevStageConfig::Operation oper
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}
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}
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/// Writes the if-statement condition used to evaluate alpha testing
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static void AppendAlphaTestCondition(std::string& out, Regs::CompareFunc func) {
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using CompareFunc = Regs::CompareFunc;
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switch (func) {
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@ -270,6 +277,7 @@ static void AppendAlphaTestCondition(std::string& out, Regs::CompareFunc func) {
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}
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}
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/// Writes the code to emulate the specified TEV stage
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static void WriteTevStage(std::string& out, const ShaderCacheKey& config, unsigned index) {
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auto& stage = config.tev_stages[index];
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if (!IsPassThroughTevStage(stage)) {
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@ -10,8 +10,18 @@
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namespace GLShader {
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/**
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* Generates the GLSL vertex shader program source code for the current Pica state
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* @returns String of the shader source code
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*/
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std::string GenerateVertexShader();
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/**
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* Generates the GLSL fragment shader program source code for the current Pica state
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* @param config ShaderCacheKey object generated for the current Pica state, used for the shader
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* configuration (NOTE: Use state in this struct only, not the Pica registers!)
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* @returns String of the shader source code
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*/
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std::string GenerateFragmentShader(const ShaderCacheKey& config);
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} // namespace GLShader
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