1 /* 2 * Copyright (C) 2010 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 ANDROID_HWUI_FBO_CACHE_H 18 #define ANDROID_HWUI_FBO_CACHE_H 19 20 #include <GLES2/gl2.h> 21 22 #include <utils/SortedVector.h> 23 24 namespace android { 25 namespace uirenderer { 26 27 /////////////////////////////////////////////////////////////////////////////// 28 // Cache 29 /////////////////////////////////////////////////////////////////////////////// 30 31 class FboCache { 32 public: 33 FboCache(); 34 ~FboCache(); 35 36 /** 37 * Returns an FBO from the cache. If no FBO is available, a new one 38 * is created. If creating a new FBO fails, 0 is returned. 39 * 40 * When an FBO is obtained from the cache, it is removed and the 41 * total number of FBOs available in the cache decreases. 42 * 43 * @return The name of the FBO, or 0 if no FBO can be obtained. 44 */ 45 GLuint get(); 46 47 /** 48 * Adds the specified FBO to the cache. 49 * 50 * @param fbo The FBO to add to the cache. 51 * 52 * @return True if the FBO was added, false otherwise. 53 */ 54 bool put(GLuint fbo); 55 56 /** 57 * Clears the cache. This causes all FBOs to be deleted. 58 */ 59 void clear(); 60 61 /** 62 * Returns the current size of the cache. 63 */ 64 uint32_t getSize(); 65 66 /** 67 * Returns the maximum number of FBOs that the cache can hold. 68 */ 69 uint32_t getMaxSize(); 70 71 private: 72 SortedVector<GLuint> mCache; 73 uint32_t mMaxSize; 74 }; // class FboCache 75 76 }; // namespace uirenderer 77 }; // namespace android 78 79 #endif // ANDROID_HWUI_FBO_CACHE_H 80