/*

 * Copyright 2016 Google Inc.

 *

 * Use of this source code is governed by a BSD-style license that can be

 * found in the LICENSE file.

 */

#ifndef SkNoDrawCanvas_DEFINED

#define SkNoDrawCanvas_DEFINED

#include "include/core/SkCanvas.h"

#include "include/core/SkCanvasVirtualEnforcer.h"

struct SkIRect;

// SkNoDrawCanvas is a helper for SkCanvas subclasses which do not need to

// actually rasterize (e.g., analysis of the draw calls).

//

// It provides the following simplifications:

//

//   * not backed by any device/pixels

//   * conservative clipping (clipping calls only use rectangles)

//

class SK_API SkNoDrawCanvas : public SkCanvasVirtualEnforcer<SkCanvas> {

public:

    SkNoDrawCanvas(int width, int height);

    SkNoDrawCanvas(const SkIRect&);

    // Optimization to reset state to be the same as after construction.

    void resetCanvas(int w, int h)        { this->resetForNextPicture(SkIRect::MakeWH(w, h)); }

    void resetCanvas(const SkIRect& rect) { this->resetForNextPicture(rect); }

protected:

    SaveLayerStrategy getSaveLayerStrategy(const SaveLayerRec& rec) override;

    bool onDoSaveBehind(const SkRect*) override;

    // No-op overrides for aborting rasterization earlier than SkNullBlitter.

    void onDrawAnnotation(const SkRect&, const char[], SkData*) override {}

    void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) override {}

    void onDrawDrawable(SkDrawable*, const SkMatrix*) override {}

    void onDrawTextBlob(const SkTextBlob*, SkScalar, SkScalar, const SkPaint&) override {}

    void onDrawPatch(const SkPoint[12], const SkColor[4], const SkPoint[4], SkBlendMode,

                     const SkPaint&) override {}

    void onDrawPaint(const SkPaint&) override {}

    void onDrawBehind(const SkPaint&) override {}

    void onDrawPoints(PointMode, size_t, const SkPoint[], const SkPaint&) override {}

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

    void onDrawRegion(const SkRegion&, const SkPaint&) override {}

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

    void onDrawArc(const SkRect&, SkScalar, SkScalar, bool, const SkPaint&) override {}

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

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

    void onDrawImage2(const SkImage*, SkScalar, SkScalar, const SkSamplingOptions&,

                      const SkPaint*) override {}

    void onDrawImageRect2(const SkImage*, const SkRect&, const SkRect&, const SkSamplingOptions&,

                          const SkPaint*, SrcRectConstraint) override {}

    void onDrawImageLattice2(const SkImage*, const Lattice&, const SkRect&, SkFilterMode,

                             const SkPaint*) override {}

    void onDrawAtlas2(const SkImage*, const SkRSXform[], const SkRect[], const SkColor[], int,

                  SkBlendMode, const SkSamplingOptions&, const SkRect*, const SkPaint*) override {}

    void onDrawVerticesObject(const SkVertices*, SkBlendMode, const SkPaint&) override {}

    void onDrawShadowRec(const SkPath&, const SkDrawShadowRec&) override {}

    void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) override {}

    void onDrawEdgeAAQuad(const SkRect&, const SkPoint[4], QuadAAFlags, const SkColor4f&,

                          SkBlendMode) override {}

    void onDrawEdgeAAImageSet2(const ImageSetEntry[], int, const SkPoint[], const SkMatrix[],

                               const SkSamplingOptions&, const SkPaint*,

                               SrcRectConstraint) override {}

private:

    using INHERITED = SkCanvasVirtualEnforcer<SkCanvas>;

};

#endif // SkNoDrawCanvas_DEFINED