third_party/blink/renderer/platform/graphics/draw_looper_builder.h

/*
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#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_DRAW_LOOPER_BUILDER_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_DRAW_LOOPER_BUILDER_H_

#include <memory>

#include "base/macros.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/allocator.h"
#include "third_party/skia/include/core/SkRefCnt.h"
#include "third_party/skia/include/effects/SkLayerDrawLooper.h"

class SkDrawLooper;

namespace blink {

class Color;
class FloatSize;

class PLATFORM_EXPORT DrawLooperBuilder final {
  STACK_ALLOCATED();

 public:
  enum ShadowTransformMode {
    kShadowRespectsTransforms,
    kShadowIgnoresTransforms
  };
  enum ShadowAlphaMode { kShadowRespectsAlpha, kShadowIgnoresAlpha };

  DrawLooperBuilder();
  ~DrawLooperBuilder();

  // Creates the SkDrawLooper and passes ownership to the caller. The builder
  // should not be used any more after calling this method.
  sk_sp<SkDrawLooper> DetachDrawLooper();

  void AddUnmodifiedContent();
  void AddShadow(const FloatSize& offset,
                 float blur,
                 const Color&,
                 ShadowTransformMode = kShadowRespectsTransforms,
                 ShadowAlphaMode = kShadowRespectsAlpha);

 private:
  SkLayerDrawLooper::Builder sk_draw_looper_builder_;

  // Implementing the copy constructor properly would require writing code to
  // copy the underlying SkLayerDrawLooper::Builder.
  DISALLOW_COPY_AND_ASSIGN(DrawLooperBuilder);
};

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_DRAW_LOOPER_BUILDER_H_