57c2b8b16a
Bug: skia: Change-Id: If8ca5e3d649dab3cf8b2bdb1cf072ff23cea9465 Reviewed-on: https://skia-review.googlesource.com/90026 Reviewed-by: Mike Reed <reed@google.com> Commit-Queue: Mike Reed <reed@google.com>
82 lines
2.3 KiB
C++
82 lines
2.3 KiB
C++
/*
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* Copyright 2016 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 SkAutoPixmapStorage_DEFINED
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#define SkAutoPixmapStorage_DEFINED
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#include "SkMalloc.h"
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#include "SkPixmap.h"
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class SkAutoPixmapStorage : public SkPixmap {
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public:
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SkAutoPixmapStorage();
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~SkAutoPixmapStorage();
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/**
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* Leave the moved-from object in a free-but-valid state.
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*/
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SkAutoPixmapStorage& operator=(SkAutoPixmapStorage&& other);
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/**
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* Try to allocate memory for the pixels needed to match the specified Info. On success
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* return true and fill out the pixmap to point to that memory. The storage will be freed
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* when this object is destroyed, or if another call to tryAlloc() or alloc() is made.
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*
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* On failure, return false and reset() the pixmap to empty.
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*/
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bool tryAlloc(const SkImageInfo&);
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/**
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* Allocate memory for the pixels needed to match the specified Info and fill out the pixmap
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* to point to that memory. The storage will be freed when this object is destroyed,
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* or if another call to tryAlloc() or alloc() is made.
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*
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* If the memory cannot be allocated, calls SK_ABORT().
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*/
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void alloc(const SkImageInfo&);
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/**
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* Gets the size and optionally the rowBytes that would be allocated by SkAutoPixmapStorage if
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* alloc/tryAlloc was called.
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*/
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static size_t AllocSize(const SkImageInfo& info, size_t* rowBytes);
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/**
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* Returns an SkData object wrapping the allocated pixels memory, and resets the pixmap.
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* If the storage hasn't been allocated, the result is NULL.
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*/
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const SkData* SK_WARN_UNUSED_RESULT detachPixelsAsData();
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// We wrap these so we can clear our internal storage
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void reset() {
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this->freeStorage();
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this->INHERITED::reset();
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}
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void reset(const SkImageInfo& info, const void* addr, size_t rb) {
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this->freeStorage();
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this->INHERITED::reset(info, addr, rb);
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}
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bool SK_WARN_UNUSED_RESULT reset(const SkMask& mask) {
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this->freeStorage();
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return this->INHERITED::reset(mask);
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}
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private:
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void* fStorage;
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void freeStorage() {
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sk_free(fStorage);
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fStorage = nullptr;
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}
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typedef SkPixmap INHERITED;
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};
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#endif
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