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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 GrCoverageSetOpXP_DEFINED
#define GrCoverageSetOpXP_DEFINED
#include "GrTypes.h"
#include "GrXferProcessor.h"
#include "SkRegion.h"
class GrProcOptInfo;
// See the comment above GrXPFactory's definition about this warning suppression.
#if defined(__GNUC__) || defined(__clang)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wnon-virtual-dtor"
#endif
/**
* This xfer processor directly blends the the src coverage with the dst using a set operator. It is
* useful for rendering coverage masks using CSG. It can optionally invert the src coverage before
* applying the set operator.
*/
class GrCoverageSetOpXPFactory : public GrXPFactory {
public:
static const GrXPFactory* Get(SkRegion::Op regionOp, bool invertCoverage = false);
private:
constexpr GrCoverageSetOpXPFactory(SkRegion::Op regionOp, bool invertCoverage);
bool willReadsDst(const GrProcOptInfo&, const GrProcOptInfo&) const override {
return fRegionOp != SkRegion::kReplace_Op;
}
GrXferProcessor* onCreateXferProcessor(const GrCaps&,
const GrPipelineAnalysis&,
bool hasMixedSamples,
const DstTexture*) const override;
bool willReadDstInShader(const GrCaps&, ColorType, CoverageType) const override {
return false;
}
GR_DECLARE_XP_FACTORY_TEST;
SkRegion::Op fRegionOp;
bool fInvertCoverage;
typedef GrXPFactory INHERITED;
};
#if defined(__GNUC__) || defined(__clang)
#pragma GCC diagnostic pop
#endif
#endif
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