submodule/skia/src/shaders/gradients/SkLinearGradient.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 SkLinearGradient_DEFINED
   9 #define SkLinearGradient_DEFINED
  10
  11 #include "src/shaders/gradients/SkGradientShaderPriv.h"
  12
  13 class SkShaderCodeDictionary;
  14
  15 class SkLinearGradient : public SkGradientShaderBase {
  16 public:
  17     SkLinearGradient(const SkPoint pts[2], const Descriptor&);
  18
  19     GradientType asAGradient(GradientInfo* info) const override;
  20 #if SK_SUPPORT_GPU
  21     std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs&) const override;
  22 #endif
  23 #ifdef SK_ENABLE_SKSL
  24     void addToKey(const SkKeyContext&,
  25                   SkPaintParamsKeyBuilder*,
  26                   SkPipelineDataGatherer*) const override;
  27 #endif
  28
  29 protected:
  30     SkLinearGradient(SkReadBuffer& buffer);
  31     void flatten(SkWriteBuffer& buffer) const override;
  32 #ifdef SK_ENABLE_LEGACY_SHADERCONTEXT
  33     Context* onMakeContext(const ContextRec&, SkArenaAlloc*) const override;
  34 #endif
  35
  36     void appendGradientStages(SkArenaAlloc* alloc, SkRasterPipeline* tPipeline,
  37                               SkRasterPipeline* postPipeline) const final;
  38
  39     skvm::F32 transformT(skvm::Builder*, skvm::Uniforms*,
  40                          skvm::Coord coord, skvm::I32* mask) const final;
  41
  42 private:
  43     SK_FLATTENABLE_HOOKS(SkLinearGradient)
  44
  45     class LinearGradient4fContext;
  46
  47     friend class SkGradientShader;
  48     using INHERITED = SkGradientShaderBase;
  49     const SkPoint fStart;
  50     const SkPoint fEnd;
  51 };
  52
  53 #endif