| /* |
| * 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 "include/core/SkRefCnt.h" |
| #include "include/core/SkRegion.h" |
| #include "src/gpu/ganesh/GrCaps.h" |
| #include "src/gpu/ganesh/GrProcessorAnalysis.h" |
| #include "src/gpu/ganesh/GrProcessorUnitTest.h" |
| #include "src/gpu/ganesh/GrXferProcessor.h" |
| |
| enum class GrClampType; |
| |
| // See the comment above GrXPFactory's definition about this warning suppression. |
| #if defined(__GNUC__) |
| #pragma GCC diagnostic push |
| #pragma GCC diagnostic ignored "-Wnon-virtual-dtor" |
| #endif |
| #if defined(__clang__) |
| #pragma clang diagnostic push |
| #pragma clang 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); |
| |
| sk_sp<const GrXferProcessor> makeXferProcessor(const GrProcessorAnalysisColor&, |
| GrProcessorAnalysisCoverage, |
| const GrCaps&, |
| GrClampType) const override; |
| |
| AnalysisProperties analysisProperties(const GrProcessorAnalysisColor& color, |
| const GrProcessorAnalysisCoverage& coverage, |
| const GrCaps&, |
| GrClampType) const override { |
| auto props = AnalysisProperties::kIgnoresInputColor; |
| switch (fRegionOp) { |
| case SkRegion::kReplace_Op: |
| props |= AnalysisProperties::kUnaffectedByDstValue; |
| break; |
| case SkRegion::kUnion_Op: |
| case SkRegion::kDifference_Op: |
| // FIXME: If we can formalize the fact that this op only operates on alpha, we can |
| // set AnalysisProperties::kUnaffectedByDstValue if color/coverage are all opaque. |
| break; |
| case SkRegion::kIntersect_Op: |
| case SkRegion::kXOR_Op: |
| case SkRegion::kReverseDifference_Op: |
| break; |
| } |
| return props; |
| } |
| |
| |
| GR_DECLARE_XP_FACTORY_TEST |
| |
| SkRegion::Op fRegionOp; |
| bool fInvertCoverage; |
| |
| using INHERITED = GrXPFactory; |
| }; |
| #if defined(__GNUC__) |
| #pragma GCC diagnostic pop |
| #endif |
| #if defined(__clang__) |
| #pragma clang diagnostic pop |
| #endif |
| |
| #endif |