Coverage Report

Created: 2021-08-22 09:07

/src/skia/include/utils/SkPaintFilterCanvas.h
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/*
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 * Copyright 2015 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 SkPaintFilterCanvas_DEFINED
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#define SkPaintFilterCanvas_DEFINED
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#include "include/core/SkCanvasVirtualEnforcer.h"
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#include "include/utils/SkNWayCanvas.h"
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class SkAndroidFrameworkUtils;
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/** \class SkPaintFilterCanvas
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    A utility proxy base class for implementing draw/paint filters.
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*/
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class SK_API SkPaintFilterCanvas : public SkCanvasVirtualEnforcer<SkNWayCanvas> {
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public:
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    /**
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     * The new SkPaintFilterCanvas is configured for forwarding to the
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     * specified canvas.  Also copies the target canvas matrix and clip bounds.
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     */
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    SkPaintFilterCanvas(SkCanvas* canvas);
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    enum Type {
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        kPicture_Type,
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    };
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    // Forwarded to the wrapped canvas.
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    SkISize getBaseLayerSize() const override { return proxy()->getBaseLayerSize(); }
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    GrRecordingContext* recordingContext() override { return proxy()->recordingContext(); }
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protected:
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    /**
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     *  Called with the paint that will be used to draw the specified type.
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     *  The implementation may modify the paint as they wish.
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     *
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     *  The result bool is used to determine whether the draw op is to be
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     *  executed (true) or skipped (false).
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     *
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     *  Note: The base implementation calls onFilter() for top-level/explicit paints only.
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     *        To also filter encapsulated paints (e.g. SkPicture, SkTextBlob), clients may need to
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     *        override the relevant methods (i.e. drawPicture, drawTextBlob).
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     */
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    virtual bool onFilter(SkPaint& paint) const = 0;
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    void onDrawPaint(const SkPaint&) override;
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    void onDrawBehind(const SkPaint&) override;
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    void onDrawPoints(PointMode, size_t count, const SkPoint pts[], const SkPaint&) override;
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    void onDrawRect(const SkRect&, const SkPaint&) override;
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    void onDrawRRect(const SkRRect&, const SkPaint&) override;
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    void onDrawDRRect(const SkRRect&, const SkRRect&, 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 onDrawPath(const SkPath&, const SkPaint&) override;
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    void onDrawImage2(const SkImage*, SkScalar, SkScalar, const SkSamplingOptions&,
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                      const SkPaint*) override;
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    void onDrawImageRect2(const SkImage*, const SkRect&, const SkRect&, const SkSamplingOptions&,
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                          const SkPaint*, SrcRectConstraint) override;
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    void onDrawImageLattice2(const SkImage*, const Lattice&, const SkRect&, SkFilterMode,
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                             const SkPaint*) override;
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    void onDrawAtlas2(const SkImage*, const SkRSXform[], const SkRect[], const SkColor[], int,
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                     SkBlendMode, const SkSamplingOptions&, const SkRect*, const SkPaint*) override;
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    void onDrawVerticesObject(const SkVertices*, SkBlendMode, const SkPaint&) override;
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    void onDrawPatch(const SkPoint cubics[12], const SkColor colors[4],
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                             const SkPoint texCoords[4], SkBlendMode,
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                             const SkPaint& paint) override;
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    void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) override;
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    void onDrawDrawable(SkDrawable*, const SkMatrix*) override;
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    void onDrawGlyphRunList(const SkGlyphRunList&, const SkPaint&) override;
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    void onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
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                        const SkPaint& paint) override;
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    void onDrawAnnotation(const SkRect& rect, const char key[], SkData* value) override;
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    void onDrawShadowRec(const SkPath& path, const SkDrawShadowRec& rec) override;
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    void onDrawEdgeAAQuad(const SkRect&, const SkPoint[4], QuadAAFlags, const SkColor4f&,
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                          SkBlendMode) override;
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    void onDrawEdgeAAImageSet2(const ImageSetEntry[], int count, const SkPoint[], const SkMatrix[],
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                               const SkSamplingOptions&,const SkPaint*, SrcRectConstraint) override;
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    // Forwarded to the wrapped canvas.
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    sk_sp<SkSurface> onNewSurface(const SkImageInfo&, const SkSurfaceProps&) override;
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    bool onPeekPixels(SkPixmap* pixmap) override;
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    bool onAccessTopLayerPixels(SkPixmap* pixmap) override;
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    SkImageInfo onImageInfo() const override;
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    bool onGetProps(SkSurfaceProps* props) const override;
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private:
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    class AutoPaintFilter;
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    SkCanvas* proxy() const { SkASSERT(fList.count() == 1); return fList[0]; }
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    SkPaintFilterCanvas* internal_private_asPaintFilterCanvas() const override {
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        return const_cast<SkPaintFilterCanvas*>(this);
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    }
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    friend class SkAndroidFrameworkUtils;
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};
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#endif