1 /* 2 * Copyright (C) 2010, Google Inc. All rights reserved. 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 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. 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 APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY 17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 */ 24 25 #ifndef TextureManager_h 26 #define TextureManager_h 27 28 #include "GraphicsContext3D.h" 29 #include "IntRect.h" 30 #include "IntSize.h" 31 32 #include <wtf/FastAllocBase.h> 33 #include <wtf/HashMap.h> 34 #include <wtf/ListHashSet.h> 35 36 namespace WebCore { 37 38 typedef int TextureToken; 39 40 class TextureManager { 41 WTF_MAKE_NONCOPYABLE(TextureManager); 42 public: create(GraphicsContext3D * context,size_t memoryLimitBytes,int maxTextureSize)43 static PassOwnPtr<TextureManager> create(GraphicsContext3D* context, size_t memoryLimitBytes, int maxTextureSize) 44 { 45 return adoptPtr(new TextureManager(context, memoryLimitBytes, maxTextureSize)); 46 } 47 48 TextureToken getToken(); 49 void releaseToken(TextureToken); 50 bool hasTexture(TextureToken); 51 52 unsigned requestTexture(TextureToken, IntSize, unsigned textureFormat, bool* newTexture = 0); 53 54 void protectTexture(TextureToken); 55 void unprotectAllTextures(); 56 bool isProtected(TextureToken); 57 58 private: 59 TextureManager(GraphicsContext3D*, size_t memoryLimitBytes, int maxTextureSize); 60 61 struct TextureInfo { 62 IntSize size; 63 unsigned format; 64 unsigned textureId; 65 bool isProtected; 66 }; 67 68 bool reduceMemoryToLimit(size_t); 69 void addTexture(TextureToken, TextureInfo); 70 void removeTexture(TextureToken, TextureInfo); 71 72 RefPtr<GraphicsContext3D> m_context; 73 74 typedef HashMap<TextureToken, TextureInfo> TextureMap; 75 TextureMap m_textures; 76 ListHashSet<TextureToken> m_textureLRUSet; 77 78 size_t m_memoryLimitBytes; 79 size_t m_memoryUseBytes; 80 int m_maxTextureSize; 81 TextureToken m_nextToken; 82 }; 83 84 } 85 86 #endif 87