chromium/third_party/blink/renderer/platform/graphics/intercepting_canvas.h

/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_INTERCEPTING_CANVAS_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_INTERCEPTING_CANVAS_H_

#include "base/check_op.h"
#include "third_party/blink/renderer/platform/graphics/paint/paint_record.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/core/SkCanvas.h"

namespace blink {

class InterceptingCanvasBase : public SkCanvas { … };

template <typename DerivedCanvas>
class CanvasInterceptor { … };

template <typename DerivedCanvas,
          typename Interceptor = CanvasInterceptor<DerivedCanvas>>
class InterceptingCanvas : public InterceptingCanvasBase {
 protected:
  explicit InterceptingCanvas(SkBitmap bitmap)
      : … { … }
  InterceptingCanvas(int width, int height)
      : … { … }

  void onDrawPaint(const SkPaint& paint) override { … }

  void onDrawPoints(PointMode mode,
                    size_t count,
                    const SkPoint pts[],
                    const SkPaint& paint) override { … }

  void onDrawRect(const SkRect& rect, const SkPaint& paint) override { … }

  void onDrawOval(const SkRect& rect, const SkPaint& paint) override { … }

  void onDrawRRect(const SkRRect& rrect, const SkPaint& paint) override { … }

  void onDrawPath(const SkPath& path, const SkPaint& paint) override { … }

  void onDrawImage2(const SkImage* image,
                    SkScalar x,
                    SkScalar y,
                    const SkSamplingOptions& sampling,
                    const SkPaint* paint) override { … }

  void onDrawImageRect2(const SkImage* image,
                        const SkRect& src,
                        const SkRect& dst,
                        const SkSamplingOptions& sampling,
                        const SkPaint* paint,
                        SrcRectConstraint constraint) override { … }

  void onDrawVerticesObject(const SkVertices* vertices,
                            SkBlendMode bmode,
                            const SkPaint& paint) override { … }

  void onDrawDRRect(const SkRRect& outer,
                    const SkRRect& inner,
                    const SkPaint& paint) override { … }

  void onDrawTextBlob(const SkTextBlob* blob,
                      SkScalar x,
                      SkScalar y,
                      const SkPaint& paint) override { … }

  void onClipRect(const SkRect& rect,
                  SkClipOp op,
                  ClipEdgeStyle edge_style) override { … }

  void onClipRRect(const SkRRect& rrect,
                   SkClipOp op,
                   ClipEdgeStyle edge_style) override { … }

  void onClipPath(const SkPath& path,
                  SkClipOp op,
                  ClipEdgeStyle edge_style) override { … }

  void onClipRegion(const SkRegion& region, SkClipOp op) override { … }

  void onDrawPicture(const SkPicture* picture,
                     const SkMatrix* matrix,
                     const SkPaint* paint) override { … }

  void didSetM44(const SkM44&) override { … }

  void didConcat44(const SkM44&) override { … }

  void didScale(SkScalar x, SkScalar y) override { … }

  void didTranslate(SkScalar x, SkScalar y) override { … }

  void willSave() override { … }

  SkCanvas::SaveLayerStrategy getSaveLayerStrategy(
      const SaveLayerRec& rec) override { … }

  void willRestore() override { … }
};

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_INTERCEPTING_CANVAS_H_