• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /*
2  * Copyright 2021 Google LLC.
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 GrGrModulateAtlasCoverageEffect_DEFINED
9 #define GrGrModulateAtlasCoverageEffect_DEFINED
10 
11 #include "src/gpu/GrFragmentProcessor.h"
12 
13 // Multiplies 'inputFP' by the coverage value in an atlas, optionally inverting or clamping to 0.
14 class GrModulateAtlasCoverageEffect : public GrFragmentProcessor {
15 public:
16     enum class Flags {
17         kNone = 0,
18         kInvertCoverage = 1 << 0,  // Return inputColor * (1 - atlasCoverage).
19         kCheckBounds = 1 << 1  // Clamp atlasCoverage to 0 if outside the path's valid atlas bounds.
20     };
21 
22     GR_DECL_BITFIELD_CLASS_OPS_FRIENDS(Flags);
23 
24     GrModulateAtlasCoverageEffect(Flags flags, std::unique_ptr<GrFragmentProcessor> inputFP,
25                                   GrSurfaceProxyView atlasView, const SkMatrix& devToAtlasMatrix,
26                                   const SkIRect& devIBounds);
27 
28     GrModulateAtlasCoverageEffect(const GrModulateAtlasCoverageEffect& that);
29 
name()30     const char* name() const override {
31         return "GrModulateAtlasCoverageFP";
32     }
33 
clone()34     std::unique_ptr<GrFragmentProcessor> clone() const override {
35         return std::make_unique<GrModulateAtlasCoverageEffect>(*this);
36     }
37 
38 private:
39     void onAddToKey(const GrShaderCaps&, skgpu::KeyBuilder* b) const override;
40 
onIsEqual(const GrFragmentProcessor & that)41     bool onIsEqual(const GrFragmentProcessor& that) const override {
42         auto fp = that.cast<GrModulateAtlasCoverageEffect>();
43         return fFlags == fp.fFlags && fBounds == fp.fBounds;
44     }
45     std::unique_ptr<ProgramImpl> onMakeProgramImpl() const override;
46 
47     const Flags fFlags;
48     const SkIRect fBounds;
49 };
50 
51 GR_MAKE_BITFIELD_CLASS_OPS(GrModulateAtlasCoverageEffect::Flags)
52 
53 #endif
54