1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * Copyright (c) 2011-2012, The Linux Foundation. All rights reserved. 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 #include <GLES2/gl2.h> 19 #include <EGL/egl.h> 20 #include <gl2ext.h> 21 #include <OpenGLRenderer.h> 22 #include "tilerenderer.h" 23 24 namespace android { 25 ANDROID_SINGLETON_STATIC_INSTANCE(uirenderer::TileRenderer) ; 26 namespace uirenderer { 27 28 TileRenderer::TileRenderer() { 29 mIsTiled = false; 30 } 31 32 TileRenderer::~TileRenderer() { 33 } 34 35 void TileRenderer::startTileRendering(OpenGLRenderer* renderer, 36 int left, int top, 37 int right, int bottom) { 38 int width = 0; 39 int height = 0; 40 GLenum status = GL_NO_ERROR; 41 42 if (renderer != NULL) { 43 renderer->getViewport(width, height); 44 } 45 46 if (!left && !right && !top && !bottom) { 47 left = 0; 48 top = 0; 49 right = width; 50 bottom = height; 51 } 52 53 if (!left && !right && !top && !bottom) { 54 //can't do tile rendering 55 ALOGE("can't tile render; drity region, width, height not available"); 56 return; 57 } 58 59 int l = left, t = (height - bottom), w = (right - left), h = (bottom - top), preserve = 0; 60 61 if (l < 0 || t < 0) { 62 l = (l < 0) ? 0 : l; 63 t = (t < 0) ? 0 : t; 64 preserve = 1; 65 } 66 67 if (w > width || h > height) { 68 w = (w > width) ? width : w; 69 h = (h > height) ? height : h; 70 preserve = 1; 71 } 72 73 //clear off all errors before tiling, if any 74 while ((status = glGetError()) != GL_NO_ERROR); 75 76 if (preserve) 77 glStartTilingQCOM(l, t, w, h, GL_COLOR_BUFFER_BIT0_QCOM); 78 else 79 glStartTilingQCOM(l, t, w, h, GL_NONE); 80 81 status = glGetError(); 82 if (status == GL_NO_ERROR) 83 mIsTiled = true; 84 } 85 86 void TileRenderer::endTileRendering(OpenGLRenderer*) { 87 if (!mIsTiled) { 88 return; 89 } 90 glEndTilingQCOM(GL_COLOR_BUFFER_BIT0_QCOM); 91 mIsTiled = false; 92 GLenum status = GL_NO_ERROR; 93 while ((status = glGetError()) != GL_NO_ERROR); 94 } 95 96 }; // namespace uirenderer 97 }; // namespace android 98
