LayerRenderer.cpp revision 7d7b5490a0b0763e831b31bc11f17d8159b5914a
1/* 2 * Copyright (C) 2011 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 "LayerRenderer.h" 20#include "Properties.h" 21 22namespace android { 23namespace uirenderer { 24 25/////////////////////////////////////////////////////////////////////////////// 26// Rendering 27/////////////////////////////////////////////////////////////////////////////// 28 29void LayerRenderer::prepareDirty(float left, float top, float right, float bottom, bool opaque) { 30 LAYER_RENDERER_LOGD("Rendering into layer, fbo = %d", mLayer->fbo); 31 32#if RENDER_LAYERS_AS_REGIONS 33 mLayer->region.clear(); 34#endif 35 36 glBindFramebuffer(GL_FRAMEBUFFER, mLayer->fbo); 37 38 OpenGLRenderer::prepareDirty(0.0f, 0.0f, mLayer->width, mLayer->height, opaque); 39} 40 41void LayerRenderer::finish() { 42 OpenGLRenderer::finish(); 43 44 generateMesh(); 45 46 LAYER_RENDERER_LOGD("Finished rendering into layer, fbo = %d", mLayer->mFbo); 47 48 // No need to unbind our FBO, this will be taken care of by the caller 49 // who will invoke OpenGLRenderer::resume() 50} 51 52GLint LayerRenderer::getTargetFbo() { 53 return mLayer->fbo; 54} 55 56/////////////////////////////////////////////////////////////////////////////// 57// Dirty region tracking 58/////////////////////////////////////////////////////////////////////////////// 59 60bool LayerRenderer::hasLayer() { 61 return true; 62} 63 64Region* LayerRenderer::getRegion() { 65#if RENDER_LAYERS_AS_REGIONS 66 if (getSnapshot()->flags & Snapshot::kFlagFboTarget) { 67 return OpenGLRenderer::getRegion(); 68 } 69 return &mLayer->region; 70#else 71 return OpenGLRenderer::getRegion(); 72#endif 73} 74 75void LayerRenderer::generateMesh() { 76#if RENDER_LAYERS_AS_REGIONS 77 if (mLayer->region.isRect() || mLayer->region.isEmpty()) { 78 if (mLayer->mesh) { 79 delete mLayer->mesh; 80 delete mLayer->meshIndices; 81 82 mLayer->mesh = NULL; 83 mLayer->meshIndices = NULL; 84 mLayer->meshElementCount = 0; 85 } 86 return; 87 } 88 89 size_t count; 90 const android::Rect* rects = mLayer->region.getArray(&count); 91 92 GLsizei elementCount = count * 6; 93 94 if (mLayer->mesh && mLayer->meshElementCount < elementCount) { 95 delete mLayer->mesh; 96 delete mLayer->meshIndices; 97 98 mLayer->mesh = NULL; 99 mLayer->meshIndices = NULL; 100 } 101 102 if (!mLayer->mesh) { 103 mLayer->mesh = new TextureVertex[count * 4]; 104 mLayer->meshIndices = new uint16_t[elementCount]; 105 mLayer->meshElementCount = elementCount; 106 } 107 108 const float texX = 1.0f / float(mLayer->width); 109 const float texY = 1.0f / float(mLayer->height); 110 const float height = mLayer->layer.getHeight(); 111 112 TextureVertex* mesh = mLayer->mesh; 113 uint16_t* indices = mLayer->meshIndices; 114 115 for (size_t i = 0; i < count; i++) { 116 const android::Rect* r = &rects[i]; 117 118 const float u1 = r->left * texX; 119 const float v1 = (height - r->top) * texY; 120 const float u2 = r->right * texX; 121 const float v2 = (height - r->bottom) * texY; 122 123 TextureVertex::set(mesh++, r->left, r->top, u1, v1); 124 TextureVertex::set(mesh++, r->right, r->top, u2, v1); 125 TextureVertex::set(mesh++, r->left, r->bottom, u1, v2); 126 TextureVertex::set(mesh++, r->right, r->bottom, u2, v2); 127 128 uint16_t quad = i * 4; 129 int index = i * 6; 130 indices[index ] = quad; // top-left 131 indices[index + 1] = quad + 1; // top-right 132 indices[index + 2] = quad + 2; // bottom-left 133 indices[index + 3] = quad + 2; // bottom-left 134 indices[index + 4] = quad + 1; // top-right 135 indices[index + 5] = quad + 3; // bottom-right 136 } 137#endif 138} 139 140/////////////////////////////////////////////////////////////////////////////// 141// Layers management 142/////////////////////////////////////////////////////////////////////////////// 143 144Layer* LayerRenderer::createLayer(uint32_t width, uint32_t height, bool isOpaque) { 145 LAYER_RENDERER_LOGD("Creating new layer %dx%d", width, height); 146 147 Layer* layer = new Layer(width, height); 148 149 GLuint previousFbo; 150 glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &previousFbo); 151 152 glGenFramebuffers(1, &layer->fbo); 153 glBindFramebuffer(GL_FRAMEBUFFER, layer->fbo); 154 155 if (glGetError() != GL_NO_ERROR) { 156 glBindFramebuffer(GL_FRAMEBUFFER, previousFbo); 157 glDeleteBuffers(1, &layer->fbo); 158 return 0; 159 } 160 161 glActiveTexture(GL_TEXTURE0); 162 glGenTextures(1, &layer->texture); 163 glBindTexture(GL_TEXTURE_2D, layer->texture); 164 165 glPixelStorei(GL_UNPACK_ALIGNMENT, 4); 166 167 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); 168 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); 169 170 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 171 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 172 173 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, 174 GL_RGBA, GL_UNSIGNED_BYTE, NULL); 175 176 if (glGetError() != GL_NO_ERROR) { 177 glBindFramebuffer(GL_FRAMEBUFFER, previousFbo); 178 glDeleteBuffers(1, &layer->fbo); 179 glDeleteTextures(1, &layer->texture); 180 delete layer; 181 return 0; 182 } 183 184 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 185 layer->texture, 0); 186 187 if (glGetError() != GL_NO_ERROR) { 188 glBindFramebuffer(GL_FRAMEBUFFER, previousFbo); 189 glDeleteBuffers(1, &layer->fbo); 190 glDeleteTextures(1, &layer->texture); 191 delete layer; 192 return 0; 193 } 194 195 glBindFramebuffer(GL_FRAMEBUFFER, previousFbo); 196 197 layer->layer.set(0.0f, 0.0f, width, height); 198 layer->texCoords.set(0.0f, 1.0f, 1.0f, 0.0f); 199 layer->alpha = 255; 200 layer->mode = SkXfermode::kSrcOver_Mode; 201 layer->blend = !isOpaque; 202 layer->empty = false; 203 layer->colorFilter = NULL; 204 205 return layer; 206} 207 208bool LayerRenderer::resizeLayer(Layer* layer, uint32_t width, uint32_t height) { 209 if (layer) { 210 LAYER_RENDERER_LOGD("Resizing layer fbo = %d to %dx%d", layer->fbo, width, height); 211 212 glActiveTexture(GL_TEXTURE0); 213 glBindTexture(GL_TEXTURE_2D, layer->texture); 214 215 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, 216 GL_RGBA, GL_UNSIGNED_BYTE, NULL); 217 218 if (glGetError() != GL_NO_ERROR) { 219 glDeleteBuffers(1, &layer->fbo); 220 glDeleteTextures(1, &layer->texture); 221 222 layer->width = 0; 223 layer->height = 0; 224 layer->fbo = 0; 225 layer->texture = 0; 226 227 return false; 228 } 229 230 layer->width = width; 231 layer->height = height; 232 } 233 return true; 234} 235 236void LayerRenderer::destroyLayer(Layer* layer) { 237 if (layer) { 238 LAYER_RENDERER_LOGD("Destroying layer, fbo = %d", layer->fbo); 239 240 if (layer->fbo) glDeleteFramebuffers(1, &layer->fbo); 241 if (layer->texture) glDeleteTextures(1, &layer->texture); 242 243 delete layer; 244 } 245} 246 247void LayerRenderer::destroyLayerDeferred(Layer* layer) { 248 if (layer) { 249 LAYER_RENDERER_LOGD("Deferring layer destruction, fbo = %d", layer->fbo); 250 251 Caches::getInstance().deleteLayerDeferred(layer); 252 } 253} 254 255}; // namespace uirenderer 256}; // namespace android 257