55b6d8be99
Add a unique ID to SkImageFilter, and use it as part of a persistent cache of image-filtered results. This is used for caching frame-to-frame coherent filters. We also keep track of which filter subtrees do not reference the src input, and use a GenID of zero for the src input in that case. That way, subtrees which are not dependent on the filter input can be cached independently of it. This gives approximately a 4X speedup on letmespellitoutforyou.com/samples/svg/filter_terrain.svg on Z620 and Nexus10. The cache key consists of the uniqueID of the filter, the clip bounds, the CTM and the genID of the input bitmap. Since this does not yet handle the case where the input primitives (and part of the resulting filter tree) are unchanged, we have to keep around the external cache for that painting case. When the work to cache unchanging input primitives is done, the old cache can be removed, and the new UniqueIDCache will be renamed to Cache. R=bsalomon@google.com, mtklein@google.com Author: senorblanco@chromium.org Review URL: https://codereview.chromium.org/414483003
167 lines
7.2 KiB
C++
167 lines
7.2 KiB
C++
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/*
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* Copyright 2013 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 SkBitmapDevice_DEFINED
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#define SkBitmapDevice_DEFINED
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#include "SkDevice.h"
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///////////////////////////////////////////////////////////////////////////////
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class SK_API SkBitmapDevice : public SkBaseDevice {
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public:
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SK_DECLARE_INST_COUNT(SkBitmapDevice)
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/**
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* Construct a new device with the specified bitmap as its backend. It is
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* valid for the bitmap to have no pixels associated with it. In that case,
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* any drawing to this device will have no effect.
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*/
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SkBitmapDevice(const SkBitmap& bitmap);
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/**
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* Construct a new device with the specified bitmap as its backend. It is
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* valid for the bitmap to have no pixels associated with it. In that case,
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* any drawing to this device will have no effect.
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*/
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SkBitmapDevice(const SkBitmap& bitmap, const SkDeviceProperties& deviceProperties);
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static SkBitmapDevice* Create(const SkImageInfo&,
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const SkDeviceProperties* = NULL);
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virtual SkImageInfo imageInfo() const SK_OVERRIDE;
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protected:
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virtual bool filterTextFlags(const SkPaint& paint, TextFlags*) SK_OVERRIDE;
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/** Clears the entire device to the specified color (including alpha).
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* Ignores the clip.
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*/
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virtual void clear(SkColor color) SK_OVERRIDE;
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/** These are called inside the per-device-layer loop for each draw call.
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When these are called, we have already applied any saveLayer operations,
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and are handling any looping from the paint, and any effects from the
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DrawFilter.
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*/
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virtual void drawPaint(const SkDraw&, const SkPaint& paint) SK_OVERRIDE;
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virtual void drawPoints(const SkDraw&, SkCanvas::PointMode mode, size_t count,
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const SkPoint[], const SkPaint& paint) SK_OVERRIDE;
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virtual void drawRect(const SkDraw&, const SkRect& r,
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const SkPaint& paint) SK_OVERRIDE;
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virtual void drawOval(const SkDraw&, const SkRect& oval,
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const SkPaint& paint) SK_OVERRIDE;
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virtual void drawRRect(const SkDraw&, const SkRRect& rr,
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const SkPaint& paint) SK_OVERRIDE;
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/**
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* If pathIsMutable, then the implementation is allowed to cast path to a
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* non-const pointer and modify it in place (as an optimization). Canvas
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* may do this to implement helpers such as drawOval, by placing a temp
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* path on the stack to hold the representation of the oval.
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*
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* If prePathMatrix is not null, it should logically be applied before any
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* stroking or other effects. If there are no effects on the paint that
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* affect the geometry/rasterization, then the pre matrix can just be
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* pre-concated with the current matrix.
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*/
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virtual void drawPath(const SkDraw&, const SkPath& path,
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const SkPaint& paint,
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const SkMatrix* prePathMatrix = NULL,
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bool pathIsMutable = false) SK_OVERRIDE;
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virtual void drawBitmap(const SkDraw&, const SkBitmap& bitmap,
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const SkMatrix& matrix, const SkPaint& paint) SK_OVERRIDE;
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virtual void drawSprite(const SkDraw&, const SkBitmap& bitmap,
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int x, int y, const SkPaint& paint) SK_OVERRIDE;
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/**
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* The default impl. will create a bitmap-shader from the bitmap,
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* and call drawRect with it.
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*/
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virtual void drawBitmapRect(const SkDraw&, const SkBitmap&,
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const SkRect* srcOrNull, const SkRect& dst,
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const SkPaint& paint,
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SkCanvas::DrawBitmapRectFlags flags) SK_OVERRIDE;
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/**
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* Does not handle text decoration.
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* Decorations (underline and stike-thru) will be handled by SkCanvas.
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*/
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virtual void drawText(const SkDraw&, const void* text, size_t len,
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SkScalar x, SkScalar y, const SkPaint& paint) SK_OVERRIDE;
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virtual void drawPosText(const SkDraw&, const void* text, size_t len,
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const SkScalar pos[], SkScalar constY,
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int scalarsPerPos, const SkPaint& paint) SK_OVERRIDE;
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virtual void drawTextOnPath(const SkDraw&, const void* text, size_t len,
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const SkPath& path, const SkMatrix* matrix,
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const SkPaint& paint) SK_OVERRIDE;
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virtual void drawVertices(const SkDraw&, SkCanvas::VertexMode, int vertexCount,
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const SkPoint verts[], const SkPoint texs[],
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const SkColor colors[], SkXfermode* xmode,
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const uint16_t indices[], int indexCount,
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const SkPaint& paint) SK_OVERRIDE;
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/** The SkBaseDevice passed will be an SkBaseDevice which was returned by a call to
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onCreateDevice on this device with kSaveLayer_Usage.
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*/
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virtual void drawDevice(const SkDraw&, SkBaseDevice*, int x, int y,
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const SkPaint&) SK_OVERRIDE;
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///////////////////////////////////////////////////////////////////////////
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/** Update as needed the pixel value in the bitmap, so that the caller can
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access the pixels directly. Note: only the pixels field should be
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altered. The config/width/height/rowbytes must remain unchanged.
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@return the device contents as a bitmap
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*/
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virtual const SkBitmap& onAccessBitmap() SK_OVERRIDE;
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SkPixelRef* getPixelRef() const { return fBitmap.pixelRef(); }
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// just for subclasses, to assign a custom pixelref
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SkPixelRef* setPixelRef(SkPixelRef* pr) {
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fBitmap.setPixelRef(pr);
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return pr;
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}
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virtual bool onReadPixels(const SkImageInfo&, void*, size_t, int x, int y) SK_OVERRIDE;
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virtual bool onWritePixels(const SkImageInfo&, const void*, size_t, int, int) SK_OVERRIDE;
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virtual void* onAccessPixels(SkImageInfo* info, size_t* rowBytes) SK_OVERRIDE;
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/** Called when this device is installed into a Canvas. Balanced by a call
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to unlockPixels() when the device is removed from a Canvas.
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*/
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virtual void lockPixels() SK_OVERRIDE;
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virtual void unlockPixels() SK_OVERRIDE;
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private:
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friend class SkCanvas;
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friend struct DeviceCM; //for setMatrixClip
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friend class SkDraw;
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friend class SkDrawIter;
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friend class SkDeviceFilteredPaint;
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friend class SkDeviceImageFilterProxy;
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friend class SkSurface_Raster;
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// used to change the backend's pixels (and possibly config/rowbytes)
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// but cannot change the width/height, so there should be no change to
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// any clip information.
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virtual void replaceBitmapBackendForRasterSurface(const SkBitmap&) SK_OVERRIDE;
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virtual SkBaseDevice* onCreateDevice(const SkImageInfo&, Usage) SK_OVERRIDE;
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virtual SkSurface* newSurface(const SkImageInfo&) SK_OVERRIDE;
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virtual const void* peekPixels(SkImageInfo*, size_t* rowBytes) SK_OVERRIDE;
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virtual SkImageFilter::UniqueIDCache* getImageFilterCache() SK_OVERRIDE;
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SkBitmap fBitmap;
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typedef SkBaseDevice INHERITED;
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};
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#endif // SkBitmapDevice_DEFINED
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