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1 /*
2  * Copyright 2011, The Android Open Source Project
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  *  * Redistributions of source code must retain the above copyright
8  *    notice, this list of conditions and the following disclaimer.
9  *  * Redistributions in binary form must reproduce the above copyright
10  *    notice, this list of conditions and the following disclaimer in the
11  *    documentation and/or other materials provided with the distribution.
12  *
13  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24  */
25 
26 #ifndef ImagesManager_h
27 #define ImagesManager_h
28 
29 #include "HashMap.h"
30 #include "SkBitmap.h"
31 #include "SkBitmapRef.h"
32 #include "SkRefCnt.h"
33 #include "Vector.h"
34 
35 #include <utils/threads.h>
36 
37 namespace WebCore {
38 
39 class ImageTexture;
40 class GLWebViewState;
41 
42 class ImagesManager {
43 public:
44     static ImagesManager* instance();
45 
46     ImageTexture* setImage(SkBitmapRef* imgRef);
47     ImageTexture* retainImage(unsigned imgCRC);
48     void releaseImage(unsigned imgCRC);
49 
50     // should be called only by ~ImageTexture()
51     void onImageTextureDestroy(unsigned imgCRC);
52 
53     bool prepareTextures(GLWebViewState*);
54     int nbTextures();
55 
56 private:
ImagesManager()57     ImagesManager() {}
58 
59     static ImagesManager* gInstance;
60 
61     android::Mutex m_imagesLock;
62     HashMap<unsigned, ImageTexture*> m_images;
63 };
64 
65 } // namespace WebCore
66 
67 #endif // ImagesManager
68