| /* |
| * 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; |
| |
| /** |
| * 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 GrCoverageSetOpXP : public GrXferProcessor { |
| public: |
| static GrXferProcessor* Create(SkRegion::Op regionOp, bool invertCoverage) { |
| return SkNEW_ARGS(GrCoverageSetOpXP, (regionOp, invertCoverage)); |
| } |
| |
| ~GrCoverageSetOpXP() SK_OVERRIDE; |
| |
| const char* name() const SK_OVERRIDE { return "Coverage Set Op"; } |
| |
| void getGLProcessorKey(const GrGLCaps& caps, GrProcessorKeyBuilder* b) const SK_OVERRIDE; |
| |
| GrGLXferProcessor* createGLInstance() const SK_OVERRIDE; |
| |
| bool hasSecondaryOutput() const SK_OVERRIDE { return false; } |
| |
| GrXferProcessor::OptFlags getOptimizations(const GrProcOptInfo& colorPOI, |
| const GrProcOptInfo& coveragePOI, |
| bool doesStencilWrite, |
| GrColor* color, |
| const GrDrawTargetCaps& caps) SK_OVERRIDE; |
| |
| void getBlendInfo(GrXferProcessor::BlendInfo* blendInfo) const SK_OVERRIDE; |
| |
| bool invertCoverage() const { return fInvertCoverage; } |
| |
| private: |
| GrCoverageSetOpXP(SkRegion::Op regionOp, bool fInvertCoverage); |
| |
| bool onIsEqual(const GrXferProcessor& xpBase) const SK_OVERRIDE { |
| const GrCoverageSetOpXP& xp = xpBase.cast<GrCoverageSetOpXP>(); |
| return (fRegionOp == xp.fRegionOp && |
| fInvertCoverage == xp.fInvertCoverage); |
| } |
| |
| SkRegion::Op fRegionOp; |
| bool fInvertCoverage; |
| |
| typedef GrXferProcessor INHERITED; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class GrCoverageSetOpXPFactory : public GrXPFactory { |
| public: |
| static GrXPFactory* Create(SkRegion::Op regionOp, bool invertCoverage = false); |
| |
| GrXferProcessor* createXferProcessor(const GrProcOptInfo& colorPOI, |
| const GrProcOptInfo& coveragePOI) const SK_OVERRIDE; |
| |
| bool supportsRGBCoverage(GrColor knownColor, uint32_t knownColorFlags) const SK_OVERRIDE { |
| return true; |
| } |
| |
| bool canApplyCoverage(const GrProcOptInfo& colorPOI, |
| const GrProcOptInfo& coveragePOI) const SK_OVERRIDE { |
| return true; |
| } |
| |
| bool canTweakAlphaForCoverage() const SK_OVERRIDE { return false; } |
| |
| void getInvariantOutput(const GrProcOptInfo& colorPOI, const GrProcOptInfo& coveragePOI, |
| GrXPFactory::InvariantOutput*) const SK_OVERRIDE; |
| |
| bool willReadDst() const SK_OVERRIDE { return false; } |
| |
| private: |
| GrCoverageSetOpXPFactory(SkRegion::Op regionOp, bool invertCoverage); |
| |
| bool onIsEqual(const GrXPFactory& xpfBase) const SK_OVERRIDE { |
| const GrCoverageSetOpXPFactory& xpf = xpfBase.cast<GrCoverageSetOpXPFactory>(); |
| return fRegionOp == xpf.fRegionOp; |
| } |
| |
| GR_DECLARE_XP_FACTORY_TEST; |
| |
| SkRegion::Op fRegionOp; |
| bool fInvertCoverage; |
| |
| typedef GrXPFactory INHERITED; |
| }; |
| #endif |
| |