void DynamicHLSL::getPixelShaderOutputKey(const gl::Data &data,
const gl::Program::Data &programData,
const ProgramD3DMetadata &metadata,
std::vector<PixelShaderOutputVariable> *outPixelShaderKey)
{
// Two cases when writing to gl_FragColor and using ESSL 1.0:
// - with a 3.0 context, the output color is copied to channel 0
// - with a 2.0 context, the output color is broadcast to all channels
bool broadcast = metadata.usesBroadcast(data);
const unsigned int numRenderTargets =
(broadcast || metadata.usesMultipleFragmentOuts() ? data.caps->maxDrawBuffers : 1);
if (metadata.getMajorShaderVersion() < 300)
{
for (unsigned int renderTargetIndex = 0; renderTargetIndex < numRenderTargets;
renderTargetIndex++)
{
PixelShaderOutputVariable outputKeyVariable;
outputKeyVariable.type = GL_FLOAT_VEC4;
outputKeyVariable.name = "gl_Color" + Str(renderTargetIndex);
outputKeyVariable.source =
broadcast ? "gl_Color[0]" : "gl_Color[" + Str(renderTargetIndex) + "]";
outputKeyVariable.outputIndex = renderTargetIndex;
outPixelShaderKey->push_back(outputKeyVariable);
}
}
else
{
const auto &shaderOutputVars =
metadata.getFragmentShader()->getData().getActiveOutputVariables();
for (auto outputPair : programData.getOutputVariables())
{
const VariableLocation &outputLocation = outputPair.second;
const sh::ShaderVariable &outputVariable = shaderOutputVars[outputLocation.index];
const std::string &variableName = "out_" + outputLocation.name;
const std::string &elementString =
(outputLocation.element == GL_INVALID_INDEX ? "" : Str(outputLocation.element));
ASSERT(outputVariable.staticUse);
PixelShaderOutputVariable outputKeyVariable;
outputKeyVariable.type = outputVariable.type;
outputKeyVariable.name = variableName + elementString;
outputKeyVariable.source = variableName + ArrayString(outputLocation.element);
outputKeyVariable.outputIndex = outputPair.first;
outPixelShaderKey->push_back(outputKeyVariable);
}
}
}
