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      1 /*
      2  * Copyright 2014 Google Inc.
      3  *
      4  * Use of this source code is governed by a BSD-style license that can be
      5  * found in the LICENSE file.
      6  */
      7 
      8 #ifndef GrCoverageSetOpXP_DEFINED
      9 #define GrCoverageSetOpXP_DEFINED
     10 
     11 #include "GrTypes.h"
     12 #include "GrXferProcessor.h"
     13 #include "SkRegion.h"
     14 
     15 // See the comment above GrXPFactory's definition about this warning suppression.
     16 #if defined(__GNUC__)
     17 #pragma GCC diagnostic push
     18 #pragma GCC diagnostic ignored "-Wnon-virtual-dtor"
     19 #endif
     20 #if defined(__clang__)
     21 #pragma clang diagnostic push
     22 #pragma clang diagnostic ignored "-Wnon-virtual-dtor"
     23 #endif
     24 
     25 /**
     26  * This xfer processor directly blends the the src coverage with the dst using a set operator. It is
     27  * useful for rendering coverage masks using CSG. It can optionally invert the src coverage before
     28  * applying the set operator.
     29  */
     30 class GrCoverageSetOpXPFactory : public GrXPFactory {
     31 public:
     32     static const GrXPFactory* Get(SkRegion::Op regionOp, bool invertCoverage = false);
     33 
     34 private:
     35     constexpr GrCoverageSetOpXPFactory(SkRegion::Op regionOp, bool invertCoverage);
     36 
     37     sk_sp<const GrXferProcessor> makeXferProcessor(const GrProcessorAnalysisColor&,
     38                                                    GrProcessorAnalysisCoverage,
     39                                                    bool hasMixedSamples,
     40                                                    const GrCaps&,
     41                                                    GrPixelConfigIsClamped) const override;
     42 
     43     AnalysisProperties analysisProperties(const GrProcessorAnalysisColor&,
     44                                           const GrProcessorAnalysisCoverage&,
     45                                           const GrCaps&,
     46                                           GrPixelConfigIsClamped) const override {
     47         return AnalysisProperties::kIgnoresInputColor;
     48     }
     49 
     50 
     51     GR_DECLARE_XP_FACTORY_TEST
     52 
     53     SkRegion::Op fRegionOp;
     54     bool         fInvertCoverage;
     55 
     56     typedef GrXPFactory INHERITED;
     57 };
     58 #if defined(__GNUC__)
     59 #pragma GCC diagnostic pop
     60 #endif
     61 #if defined(__clang__)
     62 #pragma clang diagnostic pop
     63 #endif
     64 
     65 #endif
     66