LayerRenderer.cpp revision 80429c458506485904715180d10584092a5cd082
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 <ui/Rect.h> 20 21#include "LayerCache.h" 22#include "LayerRenderer.h" 23#include "Matrix.h" 24#include "Properties.h" 25#include "Rect.h" 26 27namespace android { 28namespace uirenderer { 29 30/////////////////////////////////////////////////////////////////////////////// 31// Rendering 32/////////////////////////////////////////////////////////////////////////////// 33 34void LayerRenderer::prepareDirty(float left, float top, float right, float bottom, bool opaque) { 35 LAYER_RENDERER_LOGD("Rendering into layer, fbo = %d", mLayer->fbo); 36 37 glBindFramebuffer(GL_FRAMEBUFFER, mLayer->fbo); 38 39 const float width = mLayer->layer.getWidth(); 40 const float height = mLayer->layer.getHeight(); 41 42#if RENDER_LAYERS_AS_REGIONS 43 Rect dirty(left, top, right, bottom); 44 if (dirty.isEmpty() || (dirty.left <= 0 && dirty.top <= 0 && 45 dirty.right >= width && dirty.bottom >= height)) { 46 mLayer->region.clear(); 47 dirty.set(0.0f, 0.0f, width, height); 48 } else { 49 dirty.intersect(0.0f, 0.0f, width, height); 50 android::Rect r(dirty.left, dirty.top, dirty.right, dirty.bottom); 51 mLayer->region.subtractSelf(r); 52 } 53 54 OpenGLRenderer::prepareDirty(dirty.left, dirty.top, dirty.right, dirty.bottom, opaque); 55#else 56 OpenGLRenderer::prepareDirty(0.0f, 0.0f, width, height, opaque); 57#endif 58} 59 60void LayerRenderer::finish() { 61 OpenGLRenderer::finish(); 62 63 generateMesh(); 64 65 LAYER_RENDERER_LOGD("Finished rendering into layer, fbo = %d", mLayer->fbo); 66 67 // No need to unbind our FBO, this will be taken care of by the caller 68 // who will invoke OpenGLRenderer::resume() 69} 70 71GLint LayerRenderer::getTargetFbo() { 72 return mLayer->fbo; 73} 74 75/////////////////////////////////////////////////////////////////////////////// 76// Dirty region tracking 77/////////////////////////////////////////////////////////////////////////////// 78 79bool LayerRenderer::hasLayer() { 80 return true; 81} 82 83Region* LayerRenderer::getRegion() { 84#if RENDER_LAYERS_AS_REGIONS 85 if (getSnapshot()->flags & Snapshot::kFlagFboTarget) { 86 return OpenGLRenderer::getRegion(); 87 } 88 return &mLayer->region; 89#else 90 return OpenGLRenderer::getRegion(); 91#endif 92} 93 94void LayerRenderer::generateMesh() { 95#if RENDER_LAYERS_AS_REGIONS 96 if (mLayer->region.isRect() || mLayer->region.isEmpty()) { 97 if (mLayer->mesh) { 98 delete mLayer->mesh; 99 delete mLayer->meshIndices; 100 101 mLayer->mesh = NULL; 102 mLayer->meshIndices = NULL; 103 mLayer->meshElementCount = 0; 104 } 105 106 mLayer->setRegionAsRect(); 107 return; 108 } 109 110 size_t count; 111 const android::Rect* rects = mLayer->region.getArray(&count); 112 113 GLsizei elementCount = count * 6; 114 115 if (mLayer->mesh && mLayer->meshElementCount < elementCount) { 116 delete mLayer->mesh; 117 delete mLayer->meshIndices; 118 119 mLayer->mesh = NULL; 120 mLayer->meshIndices = NULL; 121 } 122 123 bool rebuildIndices = false; 124 if (!mLayer->mesh) { 125 mLayer->mesh = new TextureVertex[count * 4]; 126 mLayer->meshIndices = new uint16_t[elementCount]; 127 rebuildIndices = true; 128 } 129 mLayer->meshElementCount = elementCount; 130 131 const float texX = 1.0f / float(mLayer->width); 132 const float texY = 1.0f / float(mLayer->height); 133 const float height = mLayer->layer.getHeight(); 134 135 TextureVertex* mesh = mLayer->mesh; 136 uint16_t* indices = mLayer->meshIndices; 137 138 for (size_t i = 0; i < count; i++) { 139 const android::Rect* r = &rects[i]; 140 141 const float u1 = r->left * texX; 142 const float v1 = (height - r->top) * texY; 143 const float u2 = r->right * texX; 144 const float v2 = (height - r->bottom) * texY; 145 146 TextureVertex::set(mesh++, r->left, r->top, u1, v1); 147 TextureVertex::set(mesh++, r->right, r->top, u2, v1); 148 TextureVertex::set(mesh++, r->left, r->bottom, u1, v2); 149 TextureVertex::set(mesh++, r->right, r->bottom, u2, v2); 150 151 if (rebuildIndices) { 152 uint16_t quad = i * 4; 153 int index = i * 6; 154 indices[index ] = quad; // top-left 155 indices[index + 1] = quad + 1; // top-right 156 indices[index + 2] = quad + 2; // bottom-left 157 indices[index + 3] = quad + 2; // bottom-left 158 indices[index + 4] = quad + 1; // top-right 159 indices[index + 5] = quad + 3; // bottom-right 160 } 161 } 162#endif 163} 164 165/////////////////////////////////////////////////////////////////////////////// 166// Layers management 167/////////////////////////////////////////////////////////////////////////////// 168 169Layer* LayerRenderer::createTextureLayer(bool isOpaque) { 170 LAYER_RENDERER_LOGD("Creating new texture layer"); 171 172 Layer* layer = new Layer(0, 0); 173 layer->isCacheable = false; 174 layer->isTextureLayer = true; 175 layer->blend = !isOpaque; 176 layer->empty = true; 177 layer->fbo = 0; 178 layer->colorFilter = NULL; 179 layer->fbo = 0; 180 layer->layer.set(0.0f, 0.0f, 0.0f, 0.0f); 181 layer->texCoords.set(0.0f, 1.0f, 0.0f, 1.0f); 182 layer->alpha = 255; 183 layer->mode = SkXfermode::kSrcOver_Mode; 184 layer->colorFilter = NULL; 185 layer->region.clear(); 186 187 glActiveTexture(GL_TEXTURE0); 188 glGenTextures(1, &layer->texture); 189 190 return layer; 191} 192 193Layer* LayerRenderer::createLayer(uint32_t width, uint32_t height, bool isOpaque) { 194 LAYER_RENDERER_LOGD("Creating new layer %dx%d", width, height); 195 196 GLuint fbo = Caches::getInstance().fboCache.get(); 197 if (!fbo) { 198 LOGW("Could not obtain an FBO"); 199 return NULL; 200 } 201 202 glActiveTexture(GL_TEXTURE0); 203 Layer* layer = Caches::getInstance().layerCache.get(width, height); 204 if (!layer) { 205 LOGW("Could not obtain a layer"); 206 return NULL; 207 } 208 209 layer->fbo = fbo; 210 layer->layer.set(0.0f, 0.0f, width, height); 211 layer->texCoords.set(0.0f, height / float(layer->height), 212 width / float(layer->width), 0.0f); 213 layer->alpha = 255; 214 layer->mode = SkXfermode::kSrcOver_Mode; 215 layer->blend = !isOpaque; 216 layer->colorFilter = NULL; 217 layer->region.clear(); 218 219 GLuint previousFbo; 220 glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &previousFbo); 221 222 glBindFramebuffer(GL_FRAMEBUFFER, layer->fbo); 223 glBindTexture(GL_TEXTURE_2D, layer->texture); 224 225 // Initialize the texture if needed 226 if (layer->empty) { 227 layer->empty = false; 228 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, layer->width, layer->height, 0, 229 GL_RGBA, GL_UNSIGNED_BYTE, NULL); 230 231 if (glGetError() != GL_NO_ERROR) { 232 LOGD("Could not allocate texture"); 233 glBindFramebuffer(GL_FRAMEBUFFER, previousFbo); 234 glDeleteTextures(1, &layer->texture); 235 Caches::getInstance().fboCache.put(fbo); 236 delete layer; 237 return NULL; 238 } 239 } 240 241 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 242 layer->texture, 0); 243 244 glDisable(GL_SCISSOR_TEST); 245 glClearColor(0.0f, 0.0f, 0.0f, 0.0f); 246 glClear(GL_COLOR_BUFFER_BIT); 247 glEnable(GL_SCISSOR_TEST); 248 249 glBindFramebuffer(GL_FRAMEBUFFER, previousFbo); 250 251 return layer; 252} 253 254bool LayerRenderer::resizeLayer(Layer* layer, uint32_t width, uint32_t height) { 255 if (layer) { 256 LAYER_RENDERER_LOGD("Resizing layer fbo = %d to %dx%d", layer->fbo, width, height); 257 258 if (Caches::getInstance().layerCache.resize(layer, width, height)) { 259 layer->layer.set(0.0f, 0.0f, width, height); 260 layer->texCoords.set(0.0f, height / float(layer->height), 261 width / float(layer->width), 0.0f); 262 } else { 263 if (layer->texture) glDeleteTextures(1, &layer->texture); 264 delete layer; 265 return false; 266 } 267 } 268 269 return true; 270} 271 272void LayerRenderer::updateTextureLayer(Layer* layer, uint32_t width, uint32_t height, 273 bool isOpaque, GLenum renderTarget, float* transform) { 274 if (layer) { 275 layer->blend = !isOpaque; 276 layer->width = width; 277 layer->height = height; 278 layer->layer.set(0.0f, 0.0f, width, height); 279 layer->region.set(width, height); 280 layer->regionRect.set(0.0f, 0.0f, width, height); 281 layer->texTransform.load(transform); 282 layer->renderTarget = renderTarget; 283 284 // TODO: This should be done only when the render target has changed 285 glBindTexture(layer->renderTarget, layer->texture); 286 287 glTexParameteri(layer->renderTarget, GL_TEXTURE_MIN_FILTER, GL_LINEAR); 288 glTexParameteri(layer->renderTarget, GL_TEXTURE_MAG_FILTER, GL_LINEAR); 289 290 glTexParameteri(layer->renderTarget, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 291 glTexParameteri(layer->renderTarget, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 292 } 293} 294 295void LayerRenderer::destroyLayer(Layer* layer) { 296 if (layer) { 297 LAYER_RENDERER_LOGD("Destroying layer, fbo = %d", layer->fbo); 298 299 if (layer->fbo) { 300 Caches::getInstance().fboCache.put(layer->fbo); 301 } 302 303 if (!Caches::getInstance().layerCache.put(layer)) { 304 if (layer->texture) glDeleteTextures(1, &layer->texture); 305 delete layer; 306 } else { 307 layer->region.clear(); 308 } 309 } 310} 311 312void LayerRenderer::destroyLayerDeferred(Layer* layer) { 313 if (layer) { 314 LAYER_RENDERER_LOGD("Deferring layer destruction, fbo = %d", layer->fbo); 315 316 Caches::getInstance().deleteLayerDeferred(layer); 317 } 318} 319 320bool LayerRenderer::copyLayer(Layer* layer, SkBitmap* bitmap) { 321 Caches& caches = Caches::getInstance(); 322 if (layer && layer->isTextureLayer && bitmap->width() <= caches.maxTextureSize && 323 bitmap->height() <= caches.maxTextureSize) { 324 325 GLuint fbo = caches.fboCache.get(); 326 if (!fbo) { 327 LOGW("Could not obtain an FBO"); 328 return false; 329 } 330 331 SkAutoLockPixels alp(*bitmap); 332 333 GLuint texture; 334 GLuint previousFbo; 335 336 GLenum format; 337 GLenum type; 338 339 GLenum error = GL_NO_ERROR; 340 bool status = false; 341 342 switch (bitmap->config()) { 343 case SkBitmap::kA8_Config: 344 format = GL_ALPHA; 345 type = GL_UNSIGNED_BYTE; 346 break; 347 case SkBitmap::kRGB_565_Config: 348 format = GL_RGB; 349 type = GL_UNSIGNED_SHORT_5_6_5; 350 break; 351 case SkBitmap::kARGB_4444_Config: 352 format = GL_RGBA; 353 type = GL_UNSIGNED_SHORT_4_4_4_4; 354 break; 355 case SkBitmap::kARGB_8888_Config: 356 default: 357 format = GL_RGBA; 358 type = GL_UNSIGNED_BYTE; 359 break; 360 } 361 362 float alpha = layer->alpha; 363 SkXfermode::Mode mode = layer->mode; 364 365 layer->mode = SkXfermode::kSrc_Mode; 366 layer->alpha = 255; 367 layer->fbo = fbo; 368 369 glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &previousFbo); 370 glBindFramebuffer(GL_FRAMEBUFFER, fbo); 371 372 glGenTextures(1, &texture); 373 if ((error = glGetError()) != GL_NO_ERROR) goto error; 374 375 glActiveTexture(GL_TEXTURE0); 376 glBindTexture(GL_TEXTURE_2D, texture); 377 378 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); 379 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); 380 381 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 382 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 383 384 glTexImage2D(GL_TEXTURE_2D, 0, format, bitmap->width(), bitmap->height(), 385 0, format, type, NULL); 386 if ((error = glGetError()) != GL_NO_ERROR) goto error; 387 388 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, 389 GL_TEXTURE_2D, texture, 0); 390 if ((error = glGetError()) != GL_NO_ERROR) goto error; 391 392 { 393 LayerRenderer renderer(layer); 394 renderer.setViewport(bitmap->width(), bitmap->height()); 395 renderer.OpenGLRenderer::prepareDirty(0.0f, 0.0f, 396 bitmap->width(), bitmap->height(), !layer->blend); 397 if ((error = glGetError()) != GL_NO_ERROR) goto error; 398 399 { 400 Rect bounds; 401 bounds.set(0.0f, 0.0f, bitmap->width(), bitmap->height()); 402 renderer.drawTextureLayer(layer, bounds); 403 404 glReadPixels(0, 0, bitmap->width(), bitmap->height(), format, 405 type, bitmap->getPixels()); 406 407 if ((error = glGetError()) != GL_NO_ERROR) goto error; 408 } 409 410 status = true; 411 } 412 413error: 414#if DEBUG_OPENGL 415 if (error != GL_NO_ERROR) { 416 LOGD("GL error while copying layer into bitmap = 0x%x", error); 417 } 418#endif 419 420 glBindFramebuffer(GL_FRAMEBUFFER, previousFbo); 421 layer->mode = mode; 422 layer->alpha = alpha; 423 layer->fbo = 0; 424 glDeleteTextures(1, &texture); 425 caches.fboCache.put(fbo); 426 427 return status; 428 } 429 return false; 430} 431 432}; // namespace uirenderer 433}; // namespace android 434