SkMallocPixelRef.h revision 8a1c16ff38322f0210116fa7293eb8817c7e477e 
1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef SkMallocPixelRef_DEFINED
18#define SkMallocPixelRef_DEFINED
19
20#include "SkPixelRef.h"
21
22/** We explicitly use the same allocator for our pixels that SkMask does,
23    so that we can freely assign memory allocated by one class to the other.
24*/
25class SkMallocPixelRef : public SkPixelRef {
26public:
27    /** Allocate the specified buffer for pixels. The memory is freed when the
28        last owner of this pixelref is gone.
29     */
30    SkMallocPixelRef(void* addr, size_t size, SkColorTable* ctable);
31    virtual ~SkMallocPixelRef();
32
33    //! Return the allocation size for the pixels
34    size_t getSize() const { return fSize; }
35
36    // overrides from SkPixelRef
37    virtual void flatten(SkFlattenableWriteBuffer&) const;
38    virtual Factory getFactory() const {
39        return Create;
40    }
41    static SkPixelRef* Create(SkFlattenableReadBuffer& buffer) {
42        return SkNEW_ARGS(SkMallocPixelRef, (buffer));
43    }
44
45protected:
46    // overrides from SkPixelRef
47    virtual void* onLockPixels(SkColorTable**);
48    virtual void onUnlockPixels();
49
50    SkMallocPixelRef(SkFlattenableReadBuffer& buffer);
51
52private:
53    void*           fStorage;
54    size_t          fSize;
55    SkColorTable*   fCTable;
56
57    typedef SkPixelRef INHERITED;
58};
59
60#endif
61