GrGLEffect* GrGLShaderBuilder::createAndEmitGLEffect(
const GrEffectStage& stage,
GrGLEffect::EffectKey key,
const char* fsInColor,
const char* fsOutColor,
const char* vsInCoord,
SkTArray<GrGLUniformManager::UniformHandle, true>* samplerHandles) {
GrAssert(NULL != stage.getEffect());
const GrEffect& effect = *stage.getEffect();
int numTextures = effect.numTextures();
SkSTArray<8, GrGLShaderBuilder::TextureSampler> textureSamplers;
textureSamplers.push_back_n(numTextures);
for (int i = 0; i < numTextures; ++i) {
textureSamplers[i].init(this, &effect.textureAccess(i), i);
samplerHandles->push_back(textureSamplers[i].fSamplerUniform);
}
GrGLEffect* glEffect = effect.getFactory().createGLInstance(effect);
// Enclose custom code in a block to avoid namespace conflicts
this->fVSCode.appendf("\t{ // %s\n", glEffect->name());
this->fFSCode.appendf("\t{ // %s \n", glEffect->name());
glEffect->emitCode(this,
stage,
key,
vsInCoord,
fsOutColor,
fsInColor,
textureSamplers);
this->fVSCode.appendf("\t}\n");
this->fFSCode.appendf("\t}\n");
return glEffect;
}
void GrGLProgram::buildKey(GrBinHashKeyBuilder& key) const {
// Add stage configuration to the key
key.keyData(reinterpret_cast<const uint8_t*>(&fProgramDesc), sizeof(ProgramDesc));
for(int stage = 0; stage < GrDrawTarget::kNumStages; ++stage) {
// First pass: count effects and write the count to the key.
// This may seem like we are adding redundant data to the
// key, but in ensures the one key cannot be a prefix of
// another key, or identical to the key of a different program.
GrGLEffect* currentEffect = fStageEffects[stage];
uint8_t effectCount = 0;
while (currentEffect) {
GrAssert(effectCount < 255); // overflow detection
++effectCount;
currentEffect = currentEffect->nextEffect();
}
key.keyData(reinterpret_cast<const uint8_t*>(&effectCount), sizeof(uint8_t));
// Second pass: continue building key using the effects
currentEffect = fStageEffects[stage];
while (currentEffect) {
fStageEffects[stage]->buildKey(key);
}
}
}
void GrGLPathTexGenProgramEffects::emitEffect(GrGLFragmentOnlyShaderBuilder* builder,
const GrEffectStage& stage,
const GrEffectKey& key,
const char* outColor,
const char* inColor,
int stageIndex) {
GrDrawEffect drawEffect(stage, false);
const GrEffect* effect = stage.getEffect();
SkSTArray<2, TransformedCoords> coords(effect->numTransforms());
SkSTArray<4, TextureSampler> samplers(effect->numTextures());
SkASSERT(0 == stage.getVertexAttribIndexCount());
this->setupPathTexGen(builder, drawEffect, &coords);
this->emitSamplers(builder, effect, &samplers);
GrGLEffect* glEffect = effect->getFactory().createGLInstance(drawEffect);
fGLEffects.push_back(glEffect);
// Enclose custom code in a block to avoid namespace conflicts
SkString openBrace;
openBrace.printf("\t{ // Stage %d: %s\n", stageIndex, glEffect->name());
builder->fsCodeAppend(openBrace.c_str());
SkASSERT(!glEffect->isVertexEffect());
glEffect->emitCode(builder, drawEffect, key, outColor, inColor, coords, samplers);
builder->fsCodeAppend("\t}\n");
}
void GrGLVertexProgramEffects::emitEffect(GrGLFullShaderBuilder* builder,
const GrEffectStage& stage,
const GrEffectKey& key,
const char* outColor,
const char* inColor,
int stageIndex) {
GrDrawEffect drawEffect(stage, fHasExplicitLocalCoords);
const GrEffect* effect = stage.getEffect();
SkSTArray<2, TransformedCoords> coords(effect->numTransforms());
SkSTArray<4, TextureSampler> samplers(effect->numTextures());
this->emitAttributes(builder, stage);
this->emitTransforms(builder, drawEffect, &coords);
this->emitSamplers(builder, effect, &samplers);
GrGLEffect* glEffect = effect->getFactory().createGLInstance(drawEffect);
fGLEffects.push_back(glEffect);
// Enclose custom code in a block to avoid namespace conflicts
SkString openBrace;
openBrace.printf("\t{ // Stage %d: %s\n", stageIndex, glEffect->name());
builder->vsCodeAppend(openBrace.c_str());
builder->fsCodeAppend(openBrace.c_str());
if (glEffect->isVertexEffect()) {
GrGLVertexEffect* vertexEffect = static_cast<GrGLVertexEffect*>(glEffect);
vertexEffect->emitCode(builder, drawEffect, key, outColor, inColor, coords, samplers);
} else {
glEffect->emitCode(builder, drawEffect, key, outColor, inColor, coords, samplers);
}
builder->vsCodeAppend("\t}\n");
builder->fsCodeAppend("\t}\n");
}
void GrGLProgram::doGLPost() const {
for (int stage = 0; stage < GrDrawTarget::kNumStages; ++stage) {
GrGLEffect* effect = fStageEffects[stage];
if (effect) {
effect->doGLPost();
}
}
}
bool GrGLProgram::doGLSetup(GrPrimitiveType type,
GrGLProgram::CachedData* programData) const {
for (int stage = 0; stage < GrDrawTarget::kNumStages; ++stage) {
GrGLEffect* effect = fStageEffects[stage];
if (effect) {
if (!effect->doGLSetup(type, programData->fProgramID)) {
return false;
}
}
}
return true;
}
