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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkBlendModePriv_DEFINED
#define SkBlendModePriv_DEFINED
#include "SkBlendMode.h"
#include "SkPM4f.h"
class SkRasterPipeline;
bool SkBlendMode_SupportsCoverageAsAlpha(SkBlendMode);
static inline bool SkBlendMode_CaresAboutRBOrder(SkBlendMode mode) {
return (mode > SkBlendMode::kLastSeparableMode);
}
bool SkBlendMode_ShouldPreScaleCoverage(SkBlendMode, bool rgb_coverage);
void SkBlendMode_AppendStages(SkBlendMode, SkRasterPipeline*);
enum class SkBlendModeCoeff {
kZero, /** 0 */
kOne, /** 1 */
kSC, /** src color */
kISC, /** inverse src color (i.e. 1 - sc) */
kDC, /** dst color */
kIDC, /** inverse dst color (i.e. 1 - dc) */
kSA, /** src alpha */
kISA, /** inverse src alpha (i.e. 1 - sa) */
kDA, /** dst alpha */
kIDA, /** inverse dst alpha (i.e. 1 - da) */
kCoeffCount
};
bool SkBlendMode_AsCoeff(SkBlendMode mode, SkBlendModeCoeff* src, SkBlendModeCoeff* dst);
SkPM4f SkBlendMode_Apply(SkBlendMode, const SkPM4f& src, const SkPM4f& dst);
#if SK_SUPPORT_GPU
#include "GrXferProcessor.h"
const GrXPFactory* SkBlendMode_AsXPFactory(SkBlendMode);
#endif
#endif
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