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94 lines
3.2 KiB
94 lines
3.2 KiB
/*
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* Copyright 2008 The Android Open Source Project
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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 SkMallocPixelRef_DEFINED
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#define SkMallocPixelRef_DEFINED
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#include "SkPixelRef.h"
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#include "SkRefCnt.h"
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#include "SkTypes.h"
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class SkData;
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struct SkImageInfo;
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/** We explicitly use the same allocator for our pixels that SkMask does,
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so that we can freely assign memory allocated by one class to the other.
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*/
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class SK_API SkMallocPixelRef : public SkPixelRef {
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public:
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/**
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* Return a new SkMallocPixelRef with the provided pixel storage, rowBytes,
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* and optional colortable. The caller is responsible for managing the
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* lifetime of the pixel storage buffer, as this pixelref will not try
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* to delete it.
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*
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* Returns NULL on failure.
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*/
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static sk_sp<SkPixelRef> MakeDirect(const SkImageInfo&, void* addr, size_t rowBytes);
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/**
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* Return a new SkMallocPixelRef, automatically allocating storage for the
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* pixels. If rowBytes are 0, an optimal value will be chosen automatically.
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* If rowBytes is > 0, then it will be respected, or NULL will be returned
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* if rowBytes is invalid for the specified info.
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*
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* This pixelref will ref() the specified colortable (if not NULL).
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*
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* Returns NULL on failure.
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*/
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static sk_sp<SkPixelRef> MakeAllocate(const SkImageInfo&, size_t rowBytes);
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/**
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* Identical to MakeAllocate, except all pixel bytes are zeroed.
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*/
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static sk_sp<SkPixelRef> MakeZeroed(const SkImageInfo&, size_t rowBytes);
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/**
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* Return a new SkMallocPixelRef with the provided pixel storage,
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* rowBytes, and optional colortable. On destruction, ReleaseProc
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* will be called.
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*
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* If ReleaseProc is NULL, the pixels will never be released. This
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* can be useful if the pixels were stack allocated. However, such an
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* SkMallocPixelRef must not live beyond its pixels (e.g. by copying
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* an SkBitmap pointing to it, or drawing to an SkPicture).
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*
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* Returns NULL on failure.
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*/
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typedef void (*ReleaseProc)(void* addr, void* context);
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static sk_sp<SkPixelRef> MakeWithProc(const SkImageInfo& info, size_t rowBytes, void* addr,
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ReleaseProc proc, void* context);
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/**
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* Return a new SkMallocPixelRef that will use the provided
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* SkData, rowBytes, and optional colortable as pixel storage.
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* The SkData will be ref()ed and on destruction of the PielRef,
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* the SkData will be unref()ed.
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*
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* Returns NULL on failure.
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*/
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static sk_sp<SkPixelRef> MakeWithData(const SkImageInfo&, size_t rowBytes, sk_sp<SkData> data);
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protected:
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~SkMallocPixelRef() override;
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private:
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// Uses alloc to implement NewAllocate or NewZeroed.
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static sk_sp<SkPixelRef> MakeUsing(void*(*alloc)(size_t),
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const SkImageInfo&,
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size_t rowBytes);
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ReleaseProc fReleaseProc;
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void* fReleaseProcContext;
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SkMallocPixelRef(const SkImageInfo&, void* addr, size_t rb, ReleaseProc proc, void* context);
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typedef SkPixelRef INHERITED;
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};
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#endif
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