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- /*
- * Copyright 2015 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #ifndef SkPaintFilterCanvas_DEFINED
- #define SkPaintFilterCanvas_DEFINED
- #include "include/core/SkCanvasVirtualEnforcer.h"
- #include "include/utils/SkNWayCanvas.h"
- class SkAndroidFrameworkUtils;
- /** \class SkPaintFilterCanvas
- A utility proxy base class for implementing draw/paint filters.
- */
- class SK_API SkPaintFilterCanvas : public SkCanvasVirtualEnforcer<SkNWayCanvas> {
- public:
- /**
- * The new SkPaintFilterCanvas is configured for forwarding to the
- * specified canvas. Also copies the target canvas matrix and clip bounds.
- */
- SkPaintFilterCanvas(SkCanvas* canvas);
- enum Type {
- kPicture_Type,
- };
- // Forwarded to the wrapped canvas.
- SkISize getBaseLayerSize() const override { return proxy()->getBaseLayerSize(); }
- GrContext* getGrContext() override { return proxy()->getGrContext(); }
- GrRenderTargetContext* internal_private_accessTopLayerRenderTargetContext() override {
- return proxy()->internal_private_accessTopLayerRenderTargetContext();
- }
- protected:
- /**
- * Called with the paint that will be used to draw the specified type.
- * The implementation may modify the paint as they wish.
- *
- * The result bool is used to determine whether the draw op is to be
- * executed (true) or skipped (false).
- *
- * Note: The base implementation calls onFilter() for top-level/explicit paints only.
- * To also filter encapsulated paints (e.g. SkPicture, SkTextBlob), clients may need to
- * override the relevant methods (i.e. drawPicture, drawTextBlob).
- */
- virtual bool onFilter(SkPaint& paint) const = 0;
- void onDrawPaint(const SkPaint&) override;
- void onDrawBehind(const SkPaint&) override;
- void onDrawPoints(PointMode, size_t count, const SkPoint pts[], const SkPaint&) override;
- void onDrawRect(const SkRect&, const SkPaint&) override;
- void onDrawRRect(const SkRRect&, const SkPaint&) override;
- void onDrawDRRect(const SkRRect&, const SkRRect&, 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 onDrawPath(const SkPath&, const SkPaint&) override;
- void onDrawBitmap(const SkBitmap&, SkScalar left, SkScalar top, const SkPaint*) override;
- void onDrawBitmapRect(const SkBitmap&, const SkRect* src, const SkRect& dst, const SkPaint*,
- SrcRectConstraint) override;
- void onDrawBitmapNine(const SkBitmap&, const SkIRect& center, const SkRect& dst,
- const SkPaint*) override;
- void onDrawBitmapLattice(const SkBitmap&, const Lattice&, const SkRect&,
- const SkPaint*) override;
- void onDrawImage(const SkImage*, SkScalar left, SkScalar top, const SkPaint*) override;
- void onDrawImageRect(const SkImage*, const SkRect* src, const SkRect& dst,
- const SkPaint*, SrcRectConstraint) override;
- void onDrawImageNine(const SkImage*, const SkIRect& center, const SkRect& dst,
- const SkPaint*) override;
- void onDrawImageLattice(const SkImage*, const Lattice&, const SkRect&,
- const SkPaint*) override;
- void onDrawVerticesObject(const SkVertices*, const SkVertices::Bone bones[], int boneCount,
- SkBlendMode, const SkPaint&) override;
- void onDrawPatch(const SkPoint cubics[12], const SkColor colors[4],
- const SkPoint texCoords[4], SkBlendMode,
- const SkPaint& paint) override;
- void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) override;
- void onDrawDrawable(SkDrawable*, const SkMatrix*) override;
- void onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
- const SkPaint& paint) override;
- void onDrawAtlas(const SkImage*, const SkRSXform[], const SkRect[], const SkColor[],
- int, SkBlendMode, const SkRect*, const SkPaint*) override;
- void onDrawAnnotation(const SkRect& rect, const char key[], SkData* value) override;
- void onDrawShadowRec(const SkPath& path, const SkDrawShadowRec& rec) override;
- void onDrawEdgeAAQuad(const SkRect&, const SkPoint[4], QuadAAFlags, SkColor,
- SkBlendMode) override;
- void onDrawEdgeAAImageSet(const ImageSetEntry[], int count, const SkPoint[], const SkMatrix[],
- const SkPaint*, SrcRectConstraint) override;
- // Forwarded to the wrapped canvas.
- sk_sp<SkSurface> onNewSurface(const SkImageInfo&, const SkSurfaceProps&) override;
- bool onPeekPixels(SkPixmap* pixmap) override;
- bool onAccessTopLayerPixels(SkPixmap* pixmap) override;
- SkImageInfo onImageInfo() const override;
- bool onGetProps(SkSurfaceProps* props) const override;
- private:
- class AutoPaintFilter;
- SkCanvas* proxy() const { SkASSERT(fList.count() == 1); return fList[0]; }
- SkPaintFilterCanvas* internal_private_asPaintFilterCanvas() const override {
- return const_cast<SkPaintFilterCanvas*>(this);
- }
- friend class SkAndroidFrameworkUtils;
- };
- #endif
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