64 lines
2.0 KiB
C++
64 lines
2.0 KiB
C++
/*
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* Copyright 2014 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef GrCoverageSetOpXP_DEFINED
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#define GrCoverageSetOpXP_DEFINED
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#include "GrTypes.h"
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#include "GrXferProcessor.h"
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#include "SkRegion.h"
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class GrProcOptInfo;
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/**
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* This xfer processor directly blends the the src coverage with the dst using a set operator. It is
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* useful for rendering coverage masks using CSG. It can optionally invert the src coverage before
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* applying the set operator.
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*/
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class GrCoverageSetOpXPFactory : public GrXPFactory {
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public:
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static GrXPFactory* Create(SkRegion::Op regionOp, bool invertCoverage = false);
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bool supportsRGBCoverage(GrColor /*knownColor*/,
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uint32_t /*knownColorFlags*/) const override {
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return true;
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}
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void getInvariantBlendedColor(const GrProcOptInfo& colorPOI,
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GrXPFactory::InvariantBlendedColor*) const override;
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private:
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GrCoverageSetOpXPFactory(SkRegion::Op regionOp, bool invertCoverage);
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GrXferProcessor* onCreateXferProcessor(const GrCaps& caps,
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const GrProcOptInfo& colorPOI,
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const GrProcOptInfo& coveragePOI,
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bool hasMixedSamples,
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const DstTexture*) const override;
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bool willReadDstColor(const GrCaps& /*caps*/,
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const GrProcOptInfo& /*colorPOI*/,
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const GrProcOptInfo& /*coveragePOI*/,
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bool /*hasMixedSamples*/) const override {
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return false;
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}
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bool onIsEqual(const GrXPFactory& xpfBase) const override {
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const GrCoverageSetOpXPFactory& xpf = xpfBase.cast<GrCoverageSetOpXPFactory>();
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return fRegionOp == xpf.fRegionOp;
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}
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GR_DECLARE_XP_FACTORY_TEST;
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SkRegion::Op fRegionOp;
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bool fInvertCoverage;
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typedef GrXPFactory INHERITED;
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};
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#endif
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