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/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrPaint.h"
#include "GrBlend.h"
#include "effects/GrSimpleTextureEffect.h"
void GrPaint::addColorTextureEffect(GrTexture* texture, const SkMatrix& matrix) {
GrEffectRef* effect = GrSimpleTextureEffect::Create(texture, matrix);
this->addColorEffect(effect)->unref();
}
void GrPaint::addCoverageTextureEffect(GrTexture* texture, const SkMatrix& matrix) {
GrEffectRef* effect = GrSimpleTextureEffect::Create(texture, matrix);
this->addCoverageEffect(effect)->unref();
}
void GrPaint::addColorTextureEffect(GrTexture* texture,
const SkMatrix& matrix,
const GrTextureParams& params) {
GrEffectRef* effect = GrSimpleTextureEffect::Create(texture, matrix, params);
this->addColorEffect(effect)->unref();
}
void GrPaint::addCoverageTextureEffect(GrTexture* texture,
const SkMatrix& matrix,
const GrTextureParams& params) {
GrEffectRef* effect = GrSimpleTextureEffect::Create(texture, matrix, params);
this->addCoverageEffect(effect)->unref();
}
bool GrPaint::isOpaque() const {
return this->getOpaqueAndKnownColor(NULL, NULL);
}
bool GrPaint::isOpaqueAndConstantColor(GrColor* color) const {
GrColor tempColor;
uint32_t colorComps;
if (this->getOpaqueAndKnownColor(&tempColor, &colorComps)) {
if (kRGBA_GrColorComponentFlags == colorComps) {
*color = tempColor;
return true;
}
}
return false;
}
bool GrPaint::getOpaqueAndKnownColor(GrColor* solidColor,
uint32_t* solidColorKnownComponents) const {
// TODO: Share this implementation with GrDrawState
GrColor coverage = GrColorPackRGBA(fCoverage, fCoverage, fCoverage, fCoverage);
uint32_t coverageComps = kRGBA_GrColorComponentFlags;
int count = fCoverageStages.count();
for (int i = 0; i < count; ++i) {
(*fCoverageStages[i].getEffect())->getConstantColorComponents(&coverage, &coverageComps);
}
if (kRGBA_GrColorComponentFlags != coverageComps || 0xffffffff != coverage) {
return false;
}
GrColor color = fColor;
uint32_t colorComps = kRGBA_GrColorComponentFlags;
count = fColorStages.count();
for (int i = 0; i < count; ++i) {
(*fColorStages[i].getEffect())->getConstantColorComponents(&color, &colorComps);
}
SkASSERT((NULL == solidColor) == (NULL == solidColorKnownComponents));
GrBlendCoeff srcCoeff = fSrcBlendCoeff;
GrBlendCoeff dstCoeff = fDstBlendCoeff;
GrSimplifyBlend(&srcCoeff, &dstCoeff, color, colorComps, 0, 0, 0);
bool opaque = kZero_GrBlendCoeff == dstCoeff && !GrBlendCoeffRefsDst(srcCoeff);
if (NULL != solidColor) {
if (opaque) {
switch (srcCoeff) {
case kZero_GrBlendCoeff:
*solidColor = 0;
*solidColorKnownComponents = kRGBA_GrColorComponentFlags;
break;
case kOne_GrBlendCoeff:
*solidColor = color;
*solidColorKnownComponents = colorComps;
break;
// The src coeff should never refer to the src and if it refers to dst then opaque
// should have been false.
case kSC_GrBlendCoeff:
case kISC_GrBlendCoeff:
case kDC_GrBlendCoeff:
case kIDC_GrBlendCoeff:
case kSA_GrBlendCoeff:
case kISA_GrBlendCoeff:
case kDA_GrBlendCoeff:
case kIDA_GrBlendCoeff:
default:
GrCrash("srcCoeff should not refer to src or dst.");
break;
// TODO: update this once GrPaint actually has a const color.
case kConstC_GrBlendCoeff:
case kIConstC_GrBlendCoeff:
case kConstA_GrBlendCoeff:
case kIConstA_GrBlendCoeff:
*solidColorKnownComponents = 0;
break;
}
} else {
solidColorKnownComponents = 0;
}
}
return opaque;
}
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