зеркало из https://github.com/mozilla/moz-skia.git
115 строки
3.2 KiB
C++
115 строки
3.2 KiB
C++
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef SkFlipPixelRef_DEFINED
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#define SkFlipPixelRef_DEFINED
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#include "SkBitmap.h"
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#include "SkPageFlipper.h"
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#include "SkPixelRef.h"
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#include "SkThread.h"
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class SkRegion;
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class SkFlipPixelRef : public SkPixelRef {
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public:
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SkFlipPixelRef(SkBitmap::Config, int width, int height);
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virtual ~SkFlipPixelRef();
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bool isDirty() const { return fFlipper.isDirty(); }
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const SkRegion& dirtyRgn() const { return fFlipper.dirtyRgn(); }
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void inval() { fFlipper.inval(); }
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void inval(const SkIRect& rect) { fFlipper.inval(rect); }
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void inval(const SkRegion& rgn) { fFlipper.inval(rgn); }
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void inval(const SkRect& r, bool doAA) { fFlipper.inval(r, doAA); }
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const SkRegion& beginUpdate(SkBitmap* device);
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void endUpdate();
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private:
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void getFrontBack(const void** front, void** back) const {
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if (front) {
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*front = fPage0;
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}
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if (back) {
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*back = fPage1;
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}
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}
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void swapPages();
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// Helper to copy pixels from srcAddr to the dst bitmap, clipped to clip.
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// srcAddr points to memory with the same config as dst.
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static void CopyBitsFromAddr(const SkBitmap& dst, const SkRegion& clip,
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const void* srcAddr);
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// serialization
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public:
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virtual Factory getFactory() const { return Create; }
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virtual void flatten(SkFlattenableWriteBuffer&) const;
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static SkPixelRef* Create(SkFlattenableReadBuffer& buffer);
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protected:
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virtual void* onLockPixels(SkColorTable**);
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virtual void onUnlockPixels();
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SkFlipPixelRef(SkFlattenableReadBuffer&);
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private:
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SkMutex fMutex;
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SkPageFlipper fFlipper;
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void* fStorage;
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void* fPage0; // points into fStorage;
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void* fPage1; // points into fStorage;
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size_t fSize; // size of 1 page. fStorage holds 2 pages
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SkBitmap::Config fConfig;
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typedef SkPixelRef INHERITED;
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};
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class SkAutoFlipUpdate : SkNoncopyable {
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public:
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SkAutoFlipUpdate(SkFlipPixelRef* ref) : fRef(ref) {
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fDirty = &ref->beginUpdate(&fBitmap);
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}
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~SkAutoFlipUpdate() {
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if (fRef) {
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fRef->endUpdate();
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}
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}
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const SkBitmap& bitmap() const { return fBitmap; }
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const SkRegion& dirty() const { return *fDirty; }
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// optional. This gets automatically called in the destructor (only once)
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void endUpdate() {
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if (fRef) {
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fRef->endUpdate();
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fRef = NULL;
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}
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}
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private:
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SkFlipPixelRef* fRef;
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SkBitmap fBitmap;
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const SkRegion* fDirty;
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};
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#endif
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