c5035e70cc
This is calved off of: https://codereview.chromium.org/1785643003/ (Switch SkBlurImageFilter over to new onFilterImage interface) This now relies on: https://codereview.chromium.org/1813483002/ (ImagePixelLocker now manually allocates SkPixmap) to clean up the uses of SkAutoPixmapStorage in Chromium GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1787883002 Committed: https://skia.googlesource.com/skia/+/250581493a0859987e482810879e85e5ac2dc002 Review URL: https://codereview.chromium.org/1787883002
239 lines
8.5 KiB
C++
239 lines
8.5 KiB
C++
/*
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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 SkPixmap_DEFINED
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#define SkPixmap_DEFINED
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#include "SkColor.h"
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#include "SkFilterQuality.h"
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#include "SkImageInfo.h"
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class SkColorTable;
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class SkData;
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struct SkMask;
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/**
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* Pairs SkImageInfo with actual pixels and rowbytes. This class does not try to manage the
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* lifetime of the pixel memory (nor the colortable if provided).
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*/
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class SK_API SkPixmap {
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public:
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SkPixmap()
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: fPixels(NULL), fCTable(NULL), fRowBytes(0), fInfo(SkImageInfo::MakeUnknown(0, 0))
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{}
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SkPixmap(const SkImageInfo& info, const void* addr, size_t rowBytes,
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SkColorTable* ctable = NULL)
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: fPixels(addr), fCTable(ctable), fRowBytes(rowBytes), fInfo(info)
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{
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if (kIndex_8_SkColorType == info.colorType()) {
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SkASSERT(ctable);
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} else {
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SkASSERT(NULL == ctable);
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}
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}
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void reset();
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void reset(const SkImageInfo& info, const void* addr, size_t rowBytes,
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SkColorTable* ctable = NULL);
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void reset(const SkImageInfo& info) {
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this->reset(info, NULL, 0, NULL);
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}
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/**
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* If supported, set this pixmap to point to the pixels in the specified mask and return true.
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* On failure, return false and set this pixmap to empty.
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*/
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bool SK_WARN_UNUSED_RESULT reset(const SkMask&);
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/**
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* Computes the intersection of area and this pixmap. If that intersection is non-empty,
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* set subset to that intersection and return true.
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*
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* On failure, return false and ignore the subset parameter.
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*/
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bool SK_WARN_UNUSED_RESULT extractSubset(SkPixmap* subset, const SkIRect& area) const;
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const SkImageInfo& info() const { return fInfo; }
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size_t rowBytes() const { return fRowBytes; }
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const void* addr() const { return fPixels; }
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SkColorTable* ctable() const { return fCTable; }
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int width() const { return fInfo.width(); }
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int height() const { return fInfo.height(); }
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SkColorType colorType() const { return fInfo.colorType(); }
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SkAlphaType alphaType() const { return fInfo.alphaType(); }
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bool isOpaque() const { return fInfo.isOpaque(); }
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SkIRect bounds() const { return SkIRect::MakeWH(this->width(), this->height()); }
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uint64_t getSize64() const { return sk_64_mul(fInfo.height(), fRowBytes); }
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uint64_t getSafeSize64() const { return fInfo.getSafeSize64(fRowBytes); }
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size_t getSafeSize() const { return fInfo.getSafeSize(fRowBytes); }
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const void* addr(int x, int y) const {
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return (const char*)fPixels + fInfo.computeOffset(x, y, fRowBytes);
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}
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const uint8_t* addr8() const {
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SkASSERT(1 == SkColorTypeBytesPerPixel(fInfo.colorType()));
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return reinterpret_cast<const uint8_t*>(fPixels);
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}
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const uint16_t* addr16() const {
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SkASSERT(2 == SkColorTypeBytesPerPixel(fInfo.colorType()));
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return reinterpret_cast<const uint16_t*>(fPixels);
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}
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const uint32_t* addr32() const {
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SkASSERT(4 == SkColorTypeBytesPerPixel(fInfo.colorType()));
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return reinterpret_cast<const uint32_t*>(fPixels);
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}
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const uint64_t* addr64() const {
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SkASSERT(8 == SkColorTypeBytesPerPixel(fInfo.colorType()));
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return reinterpret_cast<const uint64_t*>(fPixels);
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}
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const uint16_t* addrF16() const {
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SkASSERT(8 == SkColorTypeBytesPerPixel(fInfo.colorType()));
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SkASSERT(kRGBA_F16_SkColorType == fInfo.colorType());
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return reinterpret_cast<const uint16_t*>(fPixels);
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}
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// Offset by the specified x,y coordinates
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const uint8_t* addr8(int x, int y) const {
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SkASSERT((unsigned)x < (unsigned)fInfo.width());
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SkASSERT((unsigned)y < (unsigned)fInfo.height());
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return (const uint8_t*)((const char*)this->addr8() + y * fRowBytes + (x << 0));
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}
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const uint16_t* addr16(int x, int y) const {
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SkASSERT((unsigned)x < (unsigned)fInfo.width());
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SkASSERT((unsigned)y < (unsigned)fInfo.height());
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return (const uint16_t*)((const char*)this->addr16() + y * fRowBytes + (x << 1));
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}
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const uint32_t* addr32(int x, int y) const {
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SkASSERT((unsigned)x < (unsigned)fInfo.width());
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SkASSERT((unsigned)y < (unsigned)fInfo.height());
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return (const uint32_t*)((const char*)this->addr32() + y * fRowBytes + (x << 2));
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}
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const uint64_t* addr64(int x, int y) const {
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SkASSERT((unsigned)x < (unsigned)fInfo.width());
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SkASSERT((unsigned)y < (unsigned)fInfo.height());
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return (const uint64_t*)((const char*)this->addr64() + y * fRowBytes + (x << 3));
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}
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const uint16_t* addrF16(int x, int y) const {
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SkASSERT(kRGBA_F16_SkColorType == fInfo.colorType());
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return reinterpret_cast<const uint16_t*>(this->addr64(x, y));
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}
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// Writable versions
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void* writable_addr() const { return const_cast<void*>(fPixels); }
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uint8_t* writable_addr8(int x, int y) const {
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return const_cast<uint8_t*>(this->addr8(x, y));
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}
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uint16_t* writable_addr16(int x, int y) const {
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return const_cast<uint16_t*>(this->addr16(x, y));
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}
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uint32_t* writable_addr32(int x, int y) const {
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return const_cast<uint32_t*>(this->addr32(x, y));
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}
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uint64_t* writable_addr64(int x, int y) const {
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return const_cast<uint64_t*>(this->addr64(x, y));
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}
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uint16_t* writable_addrF16(int x, int y) const {
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return reinterpret_cast<uint16_t*>(writable_addr64(x, y));
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}
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// copy methods
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bool readPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes,
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int srcX, int srcY) const;
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bool readPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes) const {
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return this->readPixels(dstInfo, dstPixels, dstRowBytes, 0, 0);
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}
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bool readPixels(const SkPixmap& dst, int srcX, int srcY) const {
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return this->readPixels(dst.info(), dst.writable_addr(), dst.rowBytes(), srcX, srcY);
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}
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bool readPixels(const SkPixmap& dst) const {
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return this->readPixels(dst.info(), dst.writable_addr(), dst.rowBytes(), 0, 0);
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}
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/**
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* Copy the pixels from this pixmap into the dst pixmap, converting as needed into dst's
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* colortype/alphatype. If the conversion cannot be performed, false is returned.
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*
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* If dst's dimensions differ from the src dimension, the image will be scaled, applying the
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* specified filter-quality.
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*/
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bool scalePixels(const SkPixmap& dst, SkFilterQuality) const;
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/**
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* Returns true if pixels were written to (e.g. if colorType is kUnknown_SkColorType, this
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* will return false). If subset does not intersect the bounds of this pixmap, returns false.
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*/
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bool erase(SkColor, const SkIRect& subset) const;
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bool erase(SkColor color) const { return this->erase(color, this->bounds()); }
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bool erase(const SkColor4f&, const SkIRect* subset = nullptr) const;
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private:
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const void* fPixels;
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SkColorTable* fCTable;
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size_t fRowBytes;
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SkImageInfo fInfo;
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};
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/////////////////////////////////////////////////////////////////////////////////////////////
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/////////////////////////////////////////////////////////////////////////////////////////////
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class SK_API SkAutoPixmapUnlock : ::SkNoncopyable {
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public:
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SkAutoPixmapUnlock() : fUnlockProc(NULL), fIsLocked(false) {}
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SkAutoPixmapUnlock(const SkPixmap& pm, void (*unlock)(void*), void* ctx)
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: fUnlockProc(unlock), fUnlockContext(ctx), fPixmap(pm), fIsLocked(true)
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{}
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~SkAutoPixmapUnlock() { this->unlock(); }
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/**
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* Return the currently locked pixmap. Undefined if it has been unlocked.
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*/
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const SkPixmap& pixmap() const {
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SkASSERT(this->isLocked());
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return fPixmap;
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}
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bool isLocked() const { return fIsLocked; }
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/**
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* Unlocks the pixmap. Can safely be called more than once as it will only call the underlying
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* unlock-proc once.
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*/
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void unlock() {
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if (fUnlockProc) {
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SkASSERT(fIsLocked);
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fUnlockProc(fUnlockContext);
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fUnlockProc = NULL;
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fIsLocked = false;
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}
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}
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/**
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* If there is a currently locked pixmap, unlock it, then copy the specified pixmap
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* and (optional) unlock proc/context.
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*/
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void reset(const SkPixmap& pm, void (*unlock)(void*), void* ctx);
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private:
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void (*fUnlockProc)(void*);
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void* fUnlockContext;
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SkPixmap fPixmap;
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bool fIsLocked;
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friend class SkBitmap;
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};
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#endif
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