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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.
*/
#ifndef GrPorterDuffXferProcessor_DEFINED
#define GrPorterDuffXferProcessor_DEFINED
#include "GrTypes.h"
#include "GrXferProcessor.h"
#include "SkXfermode.h"
class GrProcOptInfo;
class GrPorterDuffXPFactory : public GrXPFactory {
public:
static sk_sp<GrXPFactory> Make(SkXfermode::Mode mode);
static sk_sp<GrXPFactory> Make(SkBlendMode mode) {
return Make((SkXfermode::Mode)mode);
}
void getInvariantBlendedColor(const GrProcOptInfo& colorPOI,
GrXPFactory::InvariantBlendedColor*) const override;
/** Because src-over is so common we special case it for performance reasons. If this returns
null then the SimpleSrcOverXP() below should be used. */
static GrXferProcessor* CreateSrcOverXferProcessor(const GrCaps& caps,
const GrPipelineOptimizations& optimizations,
bool hasMixedSamples,
const GrXferProcessor::DstTexture*);
/** This XP implements non-LCD src-over using hw blend with no optimizations. It is returned
by reference because it is global and its ref-cnting methods are not thread safe. */
static const GrXferProcessor& SimpleSrcOverXP();
static inline void SrcOverInvariantBlendedColor(
GrColor inputColor,
GrColorComponentFlags validColorFlags,
bool isOpaque,
GrXPFactory::InvariantBlendedColor* blendedColor) {
if (!isOpaque) {
blendedColor->fWillBlendWithDst = true;
blendedColor->fKnownColorFlags = kNone_GrColorComponentFlags;
return;
}
blendedColor->fWillBlendWithDst = false;
blendedColor->fKnownColor = inputColor;
blendedColor->fKnownColorFlags = validColorFlags;
}
static bool SrcOverWillNeedDstTexture(const GrCaps&, const GrPipelineOptimizations&);
private:
GrPorterDuffXPFactory(SkXfermode::Mode);
GrXferProcessor* onCreateXferProcessor(const GrCaps& caps,
const GrPipelineOptimizations& optimizations,
bool hasMixedSamples,
const DstTexture*) const override;
bool onWillReadDstColor(const GrCaps&, const GrPipelineOptimizations&) const override;
bool onIsEqual(const GrXPFactory& xpfBase) const override {
const GrPorterDuffXPFactory& xpf = xpfBase.cast<GrPorterDuffXPFactory>();
return fXfermode == xpf.fXfermode;
}
GR_DECLARE_XP_FACTORY_TEST;
static void TestGetXPOutputTypes(const GrXferProcessor*, int* outPrimary, int* outSecondary);
SkXfermode::Mode fXfermode;
friend class GrPorterDuffTest; // for TestGetXPOutputTypes()
typedef GrXPFactory INHERITED;
};
#endif
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