blob: 87b6f3f92f10903c975607a0ef68ea69b1aefa63 [file] [log] [blame]
/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "src/gpu/GrPrimitiveProcessor.h"
#include "src/gpu/GrCoordTransform.h"
/**
* We specialize the vertex code for each of these matrix types.
*/
enum MatrixType {
kNoPersp_MatrixType = 0,
kGeneral_MatrixType = 1,
};
GrPrimitiveProcessor::GrPrimitiveProcessor(ClassID classID) : GrProcessor(classID) {}
const GrPrimitiveProcessor::TextureSampler& GrPrimitiveProcessor::textureSampler(int i) const {
SkASSERT(i >= 0 && i < this->numTextureSamplers());
return this->onTextureSampler(i);
}
uint32_t
GrPrimitiveProcessor::getTransformKey(const SkTArray<GrCoordTransform*, true>& coords,
int numCoords) const {
uint32_t totalKey = 0;
for (int t = 0; t < numCoords; ++t) {
uint32_t key = 0;
const GrCoordTransform* coordTransform = coords[t];
if (coordTransform->getMatrix().hasPerspective()) {
key |= kGeneral_MatrixType;
} else {
key |= kNoPersp_MatrixType;
}
key <<= t;
SkASSERT(0 == (totalKey & key)); // keys for each transform ought not to overlap
totalKey |= key;
}
return totalKey;
}
///////////////////////////////////////////////////////////////////////////////////////////////////
static inline GrSamplerState::Filter clamp_filter(GrTextureType type,
GrSamplerState::Filter requestedFilter) {
if (GrTextureTypeHasRestrictedSampling(type)) {
return SkTMin(requestedFilter, GrSamplerState::Filter::kBilerp);
}
return requestedFilter;
}
GrPrimitiveProcessor::TextureSampler::TextureSampler(const GrSamplerState& samplerState,
const GrBackendFormat& backendFormat,
const GrSwizzle& swizzle) {
this->reset(samplerState, backendFormat, swizzle);
}
void GrPrimitiveProcessor::TextureSampler::reset(const GrSamplerState& samplerState,
const GrBackendFormat& backendFormat,
const GrSwizzle& swizzle) {
fSamplerState = samplerState;
fSamplerState.setFilterMode(clamp_filter(backendFormat.textureType(), samplerState.filter()));
fBackendFormat = backendFormat;
fSwizzle = swizzle;
fIsInitialized = true;
}