submodule/skia/src/shaders/gradients/SkSweepGradient.h

   1 /*
   2  * Copyright 2012 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 SkSweepGradient_DEFINED
   9 #define SkSweepGradient_DEFINED
  10
  11 #include "src/shaders/gradients/SkGradientShaderPriv.h"
  12
  13 class SkShaderCodeDictionary;
  14
  15 class SkSweepGradient final : public SkGradientShaderBase {
  16 public:
  17     SkSweepGradient(const SkPoint& center, SkScalar t0, SkScalar t1, const Descriptor&);
  18
  19     GradientType asAGradient(GradientInfo* info) const override;
  20
  21 #if SK_SUPPORT_GPU
  22     std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs&) const override;
  23 #endif
  24 #ifdef SK_ENABLE_SKSL
  25     void addToKey(const SkKeyContext&,
  26                   SkPaintParamsKeyBuilder*,
  27                   SkPipelineDataGatherer*) const override;
  28 #endif
  29
  30     SkScalar getTBias() const { return fTBias; }
  31
  32     SkScalar getTScale() const { return fTScale; }
  33
  34 protected:
  35     void flatten(SkWriteBuffer& buffer) const override;
  36
  37     void appendGradientStages(SkArenaAlloc* alloc, SkRasterPipeline* tPipeline,
  38                               SkRasterPipeline* postPipeline) const override;
  39
  40     skvm::F32 transformT(skvm::Builder*, skvm::Uniforms*,
  41                          skvm::Coord coord, skvm::I32* mask) const final;
  42 private:
  43     SK_FLATTENABLE_HOOKS(SkSweepGradient)
  44
  45     const SkPoint  fCenter;
  46     const SkScalar fTBias,
  47                    fTScale;
  48
  49     friend class SkGradientShader;
  50     using INHERITED = SkGradientShaderBase;
  51 };
  52
  53 #endif