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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 #define LOG_TAG "ImagesManager"
     27 #define LOG_NDEBUG 1
     28 
     29 #include "config.h"
     30 #include "ImagesManager.h"
     31 
     32 #include "AndroidLog.h"
     33 #include "SkCanvas.h"
     34 #include "SkDevice.h"
     35 #include "SkRefCnt.h"
     36 #include "ImageTexture.h"
     37 
     38 namespace WebCore {
     39 
     40 ImagesManager* ImagesManager::instance()
     41 {
     42     if (!gInstance)
     43         gInstance = new ImagesManager();
     44 
     45     return gInstance;
     46 }
     47 
     48 ImagesManager* ImagesManager::gInstance = 0;
     49 
     50 ImageTexture* ImagesManager::setImage(SkBitmapRef* imgRef)
     51 {
     52     if (!imgRef)
     53         return 0;
     54 
     55     TRACE_METHOD();
     56     SkBitmap* bitmap = &imgRef->bitmap();
     57     ImageTexture* image = 0;
     58     SkBitmap* img = 0;
     59     unsigned crc = 0;
     60 
     61     crc = ImageTexture::computeCRC(bitmap);
     62 
     63     {
     64         android::Mutex::Autolock lock(m_imagesLock);
     65         if (m_images.contains(crc)) {
     66             image = m_images.get(crc);
     67             SkSafeRef(image);
     68             return image;
     69         }
     70     }
     71 
     72     // the image is not in the map, we add it
     73 
     74     img = ImageTexture::convertBitmap(bitmap);
     75     image = new ImageTexture(img, crc);
     76 
     77     android::Mutex::Autolock lock(m_imagesLock);
     78     m_images.set(crc, image);
     79 
     80     return image;
     81 }
     82 
     83 ImageTexture* ImagesManager::retainImage(unsigned imgCRC)
     84 {
     85     if (!imgCRC)
     86         return 0;
     87 
     88     android::Mutex::Autolock lock(m_imagesLock);
     89     ImageTexture* image = 0;
     90     if (m_images.contains(imgCRC)) {
     91         image = m_images.get(imgCRC);
     92         SkSafeRef(image);
     93     }
     94     return image;
     95 }
     96 
     97 void ImagesManager::releaseImage(unsigned imgCRC)
     98 {
     99     if (!imgCRC)
    100         return;
    101 
    102     android::Mutex::Autolock lock(m_imagesLock);
    103     if (m_images.contains(imgCRC)) {
    104         ImageTexture* image = m_images.get(imgCRC);
    105         // don't need to remove image from the HashMap, it will unregister
    106         // itself by calling onImageTextureDestroy().
    107 
    108         SkSafeUnref(image);
    109     }
    110 }
    111 
    112 void ImagesManager::onImageTextureDestroy(unsigned imgCRC)
    113 {
    114     // NOTE: all unrefs must go through releaseImage, to ensure that
    115     // onImageTextureDestroy is called under the m_imagesLock
    116     m_images.remove(imgCRC);
    117 }
    118 
    119 int ImagesManager::nbTextures()
    120 {
    121     android::Mutex::Autolock lock(m_imagesLock);
    122     HashMap<unsigned, ImageTexture*>::iterator end = m_images.end();
    123     int i = 0;
    124     int nb = 0;
    125     for (HashMap<unsigned, ImageTexture*>::iterator it = m_images.begin(); it != end; ++it) {
    126         nb += it->second->nbTextures();
    127         i++;
    128     }
    129     return nb;
    130 }
    131 
    132 bool ImagesManager::prepareTextures(GLWebViewState* state)
    133 {
    134     bool ret = false;
    135     android::Mutex::Autolock lock(m_imagesLock);
    136     HashMap<unsigned, ImageTexture*>::iterator end = m_images.end();
    137     for (HashMap<unsigned, ImageTexture*>::iterator it = m_images.begin(); it != end; ++it) {
    138         ret |= it->second->prepareGL(state);
    139     }
    140     return ret;
    141 }
    142 
    143 } // namespace WebCore
    144