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/*
* 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 "GrInvariantOutput.h"
#ifdef SK_DEBUG
void GrInvariantOutput::validate() const {
if (fIsSingleComponent) {
SkASSERT(0 == fValidFlags || kRGBA_GrColorComponentFlags == fValidFlags);
if (kRGBA_GrColorComponentFlags == fValidFlags) {
SkASSERT(this->colorComponentsAllEqual());
}
}
SkASSERT(this->validPreMulColor());
// If we claim that we are not using the input color we must not be modulating the input.
SkASSERT(fNonMulStageFound || fWillUseInputColor);
}
bool GrInvariantOutput::colorComponentsAllEqual() const {
unsigned colorA = GrColorUnpackA(fColor);
return(GrColorUnpackR(fColor) == colorA &&
GrColorUnpackG(fColor) == colorA &&
GrColorUnpackB(fColor) == colorA);
}
bool GrInvariantOutput::validPreMulColor() const {
if (kA_GrColorComponentFlag & fValidFlags) {
float c[4];
GrColorToRGBAFloat(fColor, c);
if (kR_GrColorComponentFlag & fValidFlags) {
if (c[0] > c[3]) {
return false;
}
}
if (kG_GrColorComponentFlag & fValidFlags) {
if (c[1] > c[3]) {
return false;
}
}
if (kB_GrColorComponentFlag & fValidFlags) {
if (c[2] > c[3]) {
return false;
}
}
}
return true;
}
#endif // end DEBUG
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