SkMallocPixelRef.h

/*
 * Copyright 2008 The Android Open Source Project
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */


#ifndef SkMallocPixelRef_DEFINED
#define SkMallocPixelRef_DEFINED

#include "SkPixelRef.h"

class SK_API SkMallocPixelRef : public SkPixelRef {
public:
    static SkMallocPixelRef* NewDirect(const SkImageInfo&, void* addr,
                                       size_t rowBytes, SkColorTable*);

    static SkMallocPixelRef* NewAllocate(const SkImageInfo& info,
                                         size_t rowBytes, SkColorTable*);

    static SkMallocPixelRef* NewZeroed(const SkImageInfo& info,
                                       size_t rowBytes, SkColorTable*);

    typedef void (*ReleaseProc)(void* addr, void* context);
    static SkMallocPixelRef* NewWithProc(const SkImageInfo& info,
                                         size_t rowBytes, SkColorTable*,
                                         void* addr, ReleaseProc proc,
                                         void* context);

    static SkMallocPixelRef* NewWithData(const SkImageInfo& info,
                                         size_t rowBytes,
                                         SkColorTable* ctable,
                                         SkData* data);

    void* getAddr() const { return fStorage; }

    class PRFactory : public SkPixelRefFactory {
    public:
        SkPixelRef* create(const SkImageInfo&, size_t rowBytes, SkColorTable*) override;
    };

    class ZeroedPRFactory : public SkPixelRefFactory {
    public:
        SkPixelRef* create(const SkImageInfo&, size_t rowBytes, SkColorTable*) override;
    };

protected:
    // The ownPixels version of this constructor is deprecated.
    SkMallocPixelRef(const SkImageInfo&, void* addr, size_t rb, SkColorTable*,
                     bool ownPixels);
    virtual ~SkMallocPixelRef();

    bool onNewLockPixels(LockRec*) override;
    void onUnlockPixels() override;
    size_t getAllocatedSizeInBytes() const override;

private:
    // Uses alloc to implement NewAllocate or NewZeroed.
    static SkMallocPixelRef* NewUsing(void*(*alloc)(size_t),
                                      const SkImageInfo&,
                                      size_t rowBytes,
                                      SkColorTable*);

    void*           fStorage;
    SkColorTable*   fCTable;
    size_t          fRB;
    ReleaseProc     fReleaseProc;
    void*           fReleaseProcContext;

    SkMallocPixelRef(const SkImageInfo&, void* addr, size_t rb, SkColorTable*,
                     ReleaseProc proc, void* context);

    typedef SkPixelRef INHERITED;
};


#endif