6a280a50ed
SkRecorder has some private Skia behavior with the way it handles an SkNoDrawCanvas that is not exposed. In particular, it's able to create an arbitrary SkIRect device clip at construction time. This is a performance optimization when reusing SkNoDrawCanvas across multiple recordings instead of reconstructing a new canvas every time. https://codereview.chromium.org/2768143002 is trying to implement another version of SkPictureBuilder/SkRecorder and so wants to be able to use similar SkNoDrawCanvas behavior. Change-Id: I0ac5f0eef8f0548cefd7354062311667cf448b07 Reviewed-on: https://skia-review.googlesource.com/11320 Reviewed-by: Mike Reed <reed@google.com> Reviewed-by: Mike Klein <mtklein@chromium.org> Commit-Queue: Mike Klein <mtklein@chromium.org>
83 lines
3.8 KiB
C++
83 lines
3.8 KiB
C++
/*
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* Copyright 2016 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkNoDrawCanvas_DEFINED
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#define SkNoDrawCanvas_DEFINED
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#include "SkCanvas.h"
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#include "SkVertices.h"
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struct SkIRect;
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// SkNoDrawCanvas is a helper for SkCanvas subclasses which do not need to
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// actually rasterize (e.g., analysis of the draw calls).
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//
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// It provides the following simplifications:
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//
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// * not backed by any device/pixels
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// * conservative clipping (clipping calls only use rectangles)
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//
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class SK_API SkNoDrawCanvas : public SkCanvas {
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public:
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SkNoDrawCanvas(int width, int height);
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// TODO: investigate the users of this ctor.
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SkNoDrawCanvas(const SkIRect&);
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// Optimization to reset state to be the same as after construction.
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void resetCanvas(int width, int height) {
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resetForNextPicture(SkIRect::MakeWH(width, height));
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}
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protected:
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SaveLayerStrategy getSaveLayerStrategy(const SaveLayerRec& rec) override;
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// No-op overrides for aborting rasterization earlier than SkNullBlitter.
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void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) override {}
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void onDrawDrawable(SkDrawable*, const SkMatrix*) override {}
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void onDrawText(const void*, size_t, SkScalar, SkScalar, const SkPaint&) override {}
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void onDrawPosText(const void*, size_t, const SkPoint[], const SkPaint&) override {}
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void onDrawPosTextH(const void*, size_t, const SkScalar[], SkScalar, const SkPaint&) override {}
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void onDrawTextOnPath(const void*, size_t, const SkPath&, const SkMatrix*,
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const SkPaint&) override {}
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void onDrawTextRSXform(const void*, size_t, const SkRSXform[], const SkRect*,
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const SkPaint&) override {}
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void onDrawTextBlob(const SkTextBlob*, SkScalar, SkScalar, const SkPaint&) override {}
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void onDrawPatch(const SkPoint[12], const SkColor[4], const SkPoint[4], SkBlendMode,
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const SkPaint&) override {}
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void onDrawPaint(const SkPaint&) override {}
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void onDrawPoints(PointMode, size_t, const SkPoint[], const SkPaint&) override {}
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void onDrawRect(const SkRect&, const SkPaint&) override {}
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void onDrawRegion(const SkRegion&, const SkPaint&) override {}
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void onDrawOval(const SkRect&, const SkPaint&) override {}
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void onDrawArc(const SkRect&, SkScalar, SkScalar, bool, const SkPaint&) override {}
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void onDrawRRect(const SkRRect&, const SkPaint&) override {}
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void onDrawPath(const SkPath&, const SkPaint&) override {}
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void onDrawBitmap(const SkBitmap&, SkScalar, SkScalar, const SkPaint*) override {}
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void onDrawBitmapRect(const SkBitmap&, const SkRect*, const SkRect&, const SkPaint*,
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SrcRectConstraint) override {}
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void onDrawImage(const SkImage*, SkScalar, SkScalar, const SkPaint*) override {}
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void onDrawImageRect(const SkImage*, const SkRect*, const SkRect&, const SkPaint*,
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SrcRectConstraint) override {}
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void onDrawImageNine(const SkImage*, const SkIRect&, const SkRect&, const SkPaint*) override {}
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void onDrawBitmapNine(const SkBitmap&, const SkIRect&, const SkRect&,
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const SkPaint*) override {}
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void onDrawImageLattice(const SkImage*, const Lattice&, const SkRect&,
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const SkPaint*) override {}
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void onDrawBitmapLattice(const SkBitmap&, const Lattice&, const SkRect&,
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const SkPaint*) override {}
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void onDrawVerticesObject(const SkVertices*, SkBlendMode, const SkPaint&) override {}
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void onDrawAtlas(const SkImage*, const SkRSXform[], const SkRect[], const SkColor[],
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int, SkBlendMode, const SkRect*, const SkPaint*) override {}
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private:
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typedef SkCanvas INHERITED;
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};
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#endif // SkNoDrawCanvas_DEFINED
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