Caches.cpp revision 9bca4793a33d2714b306d69ceb870925a588fe71
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#define LOG_TAG "OpenGLRenderer" 18 19#include "Caches.h" 20 21namespace android { 22 23#ifdef USE_OPENGL_RENDERER 24using namespace uirenderer; 25ANDROID_SINGLETON_STATIC_INSTANCE(Caches); 26#endif 27 28namespace uirenderer { 29 30/////////////////////////////////////////////////////////////////////////////// 31// Constructors/destructor 32/////////////////////////////////////////////////////////////////////////////// 33 34Caches::Caches(): Singleton<Caches>(), blend(false), lastSrcMode(GL_ZERO), 35 lastDstMode(GL_ZERO), currentProgram(NULL) { 36 GLint maxTextureUnits; 37 glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &maxTextureUnits); 38 if (maxTextureUnits < REQUIRED_TEXTURE_UNITS_COUNT) { 39 LOGW("At least %d texture units are required!", REQUIRED_TEXTURE_UNITS_COUNT); 40 } 41 42 glGenBuffers(1, &meshBuffer); 43 glBindBuffer(GL_ARRAY_BUFFER, meshBuffer); 44 glBufferData(GL_ARRAY_BUFFER, sizeof(gMeshVertices), gMeshVertices, GL_STATIC_DRAW); 45 46 mCurrentBuffer = meshBuffer; 47} 48 49/** 50 * Binds the VBO used to render simple textured quads. 51 */ 52void Caches::bindMeshBuffer() { 53 bindMeshBuffer(meshBuffer); 54} 55 56/** 57 * Binds the specified VBO. 58 */ 59void Caches::bindMeshBuffer(const GLuint buffer) { 60 if (mCurrentBuffer != buffer) { 61 glBindBuffer(GL_ARRAY_BUFFER, buffer); 62 mCurrentBuffer = buffer; 63 } 64} 65 66/** 67 * Unbinds the VBO used to render simple textured quads. 68 */ 69void Caches::unbindMeshBuffer() { 70 if (mCurrentBuffer) { 71 glBindBuffer(GL_ARRAY_BUFFER, 0); 72 mCurrentBuffer = 0; 73 } 74} 75 76}; // namespace uirenderer 77}; // namespace android 78