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 #define ATRACE_TAG ATRACE_TAG_VIEW 19 20 #include <ui/Rect.h> 21 22 #include <private/hwui/DrawGlInfo.h> 23 24 #include "RenderState.h" 25 #include "LayerCache.h" 26 #include "LayerRenderer.h" 27 #include "Matrix.h" 28 #include "Properties.h" 29 #include "Rect.h" 30 31 namespace android { 32 namespace uirenderer { 33 34 /////////////////////////////////////////////////////////////////////////////// 35 // Rendering 36 /////////////////////////////////////////////////////////////////////////////// 37 38 LayerRenderer::LayerRenderer(RenderState& renderState, Layer* layer) 39 : OpenGLRenderer(renderState) 40 , mLayer(layer) { 41 } 42 43 LayerRenderer::~LayerRenderer() { 44 } 45 46 status_t LayerRenderer::prepareDirty(float left, float top, float right, float bottom, 47 bool opaque) { 48 LAYER_RENDERER_LOGD("Rendering into layer, fbo = %d", mLayer->getFbo()); 49 50 renderState().bindFramebuffer(mLayer->getFbo()); 51 52 const float width = mLayer->layer.getWidth(); 53 const float height = mLayer->layer.getHeight(); 54 55 Rect dirty(left, top, right, bottom); 56 if (dirty.isEmpty() || (dirty.left <= 0 && dirty.top <= 0 && 57 dirty.right >= width && dirty.bottom >= height)) { 58 mLayer->region.clear(); 59 dirty.set(0.0f, 0.0f, width, height); 60 } else { 61 dirty.intersect(0.0f, 0.0f, width, height); 62 android::Rect r(dirty.left, dirty.top, dirty.right, dirty.bottom); 63 mLayer->region.subtractSelf(r); 64 } 65 mLayer->clipRect.set(dirty); 66 67 return OpenGLRenderer::prepareDirty(dirty.left, dirty.top, dirty.right, dirty.bottom, opaque); 68 } 69 70 status_t LayerRenderer::clear(float left, float top, float right, float bottom, bool opaque) { 71 if (mLayer->isDirty()) { 72 getCaches().disableScissor(); 73 glClear(GL_COLOR_BUFFER_BIT); 74 75 getCaches().resetScissor(); 76 mLayer->setDirty(false); 77 78 return DrawGlInfo::kStatusDone; 79 } 80 81 return OpenGLRenderer::clear(left, top, right, bottom, opaque); 82 } 83 84 void LayerRenderer::finish() { 85 OpenGLRenderer::finish(); 86 87 generateMesh(); 88 89 LAYER_RENDERER_LOGD("Finished rendering into layer, fbo = %d", mLayer->getFbo()); 90 91 // No need to unbind our FBO, this will be taken care of by the caller 92 // who will invoke OpenGLRenderer::resume() 93 } 94 95 GLuint LayerRenderer::getTargetFbo() const { 96 return mLayer->getFbo(); 97 } 98 99 bool LayerRenderer::suppressErrorChecks() const { 100 return true; 101 } 102 103 /////////////////////////////////////////////////////////////////////////////// 104 // Layer support 105 /////////////////////////////////////////////////////////////////////////////// 106 107 bool LayerRenderer::hasLayer() const { 108 return true; 109 } 110 111 void LayerRenderer::ensureStencilBuffer() { 112 attachStencilBufferToLayer(mLayer); 113 } 114 115 /////////////////////////////////////////////////////////////////////////////// 116 // Dirty region tracking 117 /////////////////////////////////////////////////////////////////////////////// 118 119 Region* LayerRenderer::getRegion() const { 120 if (currentSnapshot()->flags & Snapshot::kFlagFboTarget) { 121 return OpenGLRenderer::getRegion(); 122 } 123 return &mLayer->region; 124 } 125 126 // TODO: This implementation uses a very simple approach to fixing T-junctions which keeps the 127 // results as rectangles, and is thus not necessarily efficient in the geometry 128 // produced. Eventually, it may be better to develop triangle-based mechanism. 129 void LayerRenderer::generateMesh() { 130 if (mLayer->region.isRect() || mLayer->region.isEmpty()) { 131 if (mLayer->mesh) { 132 delete[] mLayer->mesh; 133 mLayer->mesh = NULL; 134 mLayer->meshElementCount = 0; 135 } 136 137 mLayer->setRegionAsRect(); 138 return; 139 } 140 141 // avoid T-junctions as they cause artifacts in between the resultant 142 // geometry when complex transforms occur. 143 // TODO: generate the safeRegion only if necessary based on drawing transform (see 144 // OpenGLRenderer::composeLayerRegion()) 145 Region safeRegion = Region::createTJunctionFreeRegion(mLayer->region); 146 147 size_t count; 148 const android::Rect* rects = safeRegion.getArray(&count); 149 150 GLsizei elementCount = count * 6; 151 152 if (mLayer->mesh && mLayer->meshElementCount < elementCount) { 153 delete[] mLayer->mesh; 154 mLayer->mesh = NULL; 155 } 156 157 if (!mLayer->mesh) { 158 mLayer->mesh = new TextureVertex[count * 4]; 159 } 160 mLayer->meshElementCount = elementCount; 161 162 const float texX = 1.0f / float(mLayer->getWidth()); 163 const float texY = 1.0f / float(mLayer->getHeight()); 164 const float height = mLayer->layer.getHeight(); 165 166 TextureVertex* mesh = mLayer->mesh; 167 168 for (size_t i = 0; i < count; i++) { 169 const android::Rect* r = &rects[i]; 170 171 const float u1 = r->left * texX; 172 const float v1 = (height - r->top) * texY; 173 const float u2 = r->right * texX; 174 const float v2 = (height - r->bottom) * texY; 175 176 TextureVertex::set(mesh++, r->left, r->top, u1, v1); 177 TextureVertex::set(mesh++, r->right, r->top, u2, v1); 178 TextureVertex::set(mesh++, r->left, r->bottom, u1, v2); 179 TextureVertex::set(mesh++, r->right, r->bottom, u2, v2); 180 } 181 } 182 183 /////////////////////////////////////////////////////////////////////////////// 184 // Layers management 185 /////////////////////////////////////////////////////////////////////////////// 186 187 Layer* LayerRenderer::createRenderLayer(RenderState& renderState, uint32_t width, uint32_t height) { 188 ATRACE_CALL(); 189 LAYER_RENDERER_LOGD("Requesting new render layer %dx%d", width, height); 190 191 Caches& caches = Caches::getInstance(); 192 GLuint fbo = caches.fboCache.get(); 193 if (!fbo) { 194 ALOGW("Could not obtain an FBO"); 195 return NULL; 196 } 197 198 caches.activeTexture(0); 199 Layer* layer = caches.layerCache.get(renderState, width, height); 200 if (!layer) { 201 ALOGW("Could not obtain a layer"); 202 return NULL; 203 } 204 205 // We first obtain a layer before comparing against the max texture size 206 // because layers are not allocated at the exact desired size. They are 207 // always created slighly larger to improve recycling 208 const uint32_t maxTextureSize = caches.maxTextureSize; 209 if (layer->getWidth() > maxTextureSize || layer->getHeight() > maxTextureSize) { 210 ALOGW("Layer exceeds max. dimensions supported by the GPU (%dx%d, max=%dx%d)", 211 width, height, maxTextureSize, maxTextureSize); 212 213 // Creating a new layer always increment its refcount by 1, this allows 214 // us to destroy the layer object if one was created for us 215 Caches::getInstance().resourceCache.decrementRefcount(layer); 216 217 return NULL; 218 } 219 220 layer->setFbo(fbo); 221 layer->layer.set(0.0f, 0.0f, width, height); 222 layer->texCoords.set(0.0f, height / float(layer->getHeight()), 223 width / float(layer->getWidth()), 0.0f); 224 layer->setAlpha(255, SkXfermode::kSrcOver_Mode); 225 layer->setColorFilter(NULL); 226 layer->setDirty(true); 227 layer->region.clear(); 228 229 GLuint previousFbo = renderState.getFramebuffer(); 230 231 renderState.bindFramebuffer(layer->getFbo()); 232 layer->bindTexture(); 233 234 // Initialize the texture if needed 235 if (layer->isEmpty()) { 236 layer->setEmpty(false); 237 layer->allocateTexture(); 238 239 // This should only happen if we run out of memory 240 if (glGetError() != GL_NO_ERROR) { 241 ALOGE("Could not allocate texture for layer (fbo=%d %dx%d)", fbo, width, height); 242 renderState.bindFramebuffer(previousFbo); 243 caches.resourceCache.decrementRefcount(layer); 244 return NULL; 245 } 246 } 247 248 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 249 layer->getTexture(), 0); 250 251 renderState.bindFramebuffer(previousFbo); 252 253 return layer; 254 } 255 256 bool LayerRenderer::resizeLayer(Layer* layer, uint32_t width, uint32_t height) { 257 if (layer) { 258 LAYER_RENDERER_LOGD("Resizing layer fbo = %d to %dx%d", layer->getFbo(), width, height); 259 260 if (layer->resize(width, height)) { 261 layer->layer.set(0.0f, 0.0f, width, height); 262 layer->texCoords.set(0.0f, height / float(layer->getHeight()), 263 width / float(layer->getWidth()), 0.0f); 264 } else { 265 return false; 266 } 267 } 268 269 return true; 270 } 271 272 Layer* LayerRenderer::createTextureLayer(RenderState& renderState) { 273 LAYER_RENDERER_LOGD("Creating new texture layer"); 274 275 Layer* layer = new Layer(Layer::kType_Texture, renderState, 0, 0); 276 layer->setCacheable(false); 277 layer->setEmpty(true); 278 layer->setFbo(0); 279 layer->setAlpha(255, SkXfermode::kSrcOver_Mode); 280 layer->layer.set(0.0f, 0.0f, 0.0f, 0.0f); 281 layer->texCoords.set(0.0f, 1.0f, 1.0f, 0.0f); 282 layer->region.clear(); 283 layer->setRenderTarget(GL_NONE); // see ::updateTextureLayer() 284 285 Caches::getInstance().activeTexture(0); 286 layer->generateTexture(); 287 288 return layer; 289 } 290 291 void LayerRenderer::updateTextureLayer(Layer* layer, uint32_t width, uint32_t height, 292 bool isOpaque, bool forceFilter, GLenum renderTarget, float* textureTransform) { 293 if (layer) { 294 layer->setBlend(!isOpaque); 295 layer->setForceFilter(forceFilter); 296 layer->setSize(width, height); 297 layer->layer.set(0.0f, 0.0f, width, height); 298 layer->region.set(width, height); 299 layer->regionRect.set(0.0f, 0.0f, width, height); 300 layer->getTexTransform().load(textureTransform); 301 302 if (renderTarget != layer->getRenderTarget()) { 303 layer->setRenderTarget(renderTarget); 304 layer->bindTexture(); 305 layer->setFilter(GL_NEAREST, false, true); 306 layer->setWrap(GL_CLAMP_TO_EDGE, false, true); 307 } 308 } 309 } 310 311 void LayerRenderer::destroyLayer(Layer* layer) { 312 if (layer) { 313 ATRACE_CALL(); 314 LAYER_RENDERER_LOGD("Recycling layer, %dx%d fbo = %d", 315 layer->getWidth(), layer->getHeight(), layer->getFbo()); 316 317 if (!Caches::getInstance().layerCache.put(layer)) { 318 LAYER_RENDERER_LOGD(" Destroyed!"); 319 Caches::getInstance().resourceCache.decrementRefcount(layer); 320 } else { 321 LAYER_RENDERER_LOGD(" Cached!"); 322 #if DEBUG_LAYER_RENDERER 323 Caches::getInstance().layerCache.dump(); 324 #endif 325 layer->removeFbo(); 326 layer->region.clear(); 327 } 328 } 329 } 330 331 void LayerRenderer::destroyLayerDeferred(Layer* layer) { 332 if (layer) { 333 LAYER_RENDERER_LOGD("Deferring layer destruction, fbo = %d", layer->getFbo()); 334 335 Caches::getInstance().deleteLayerDeferred(layer); 336 } 337 } 338 339 void LayerRenderer::flushLayer(RenderState& renderState, Layer* layer) { 340 #ifdef GL_EXT_discard_framebuffer 341 if (!layer) return; 342 343 GLuint fbo = layer->getFbo(); 344 if (fbo) { 345 // If possible, discard any enqueud operations on deferred 346 // rendering architectures 347 if (Extensions::getInstance().hasDiscardFramebuffer()) { 348 GLuint previousFbo = renderState.getFramebuffer(); 349 if (fbo != previousFbo) { 350 renderState.bindFramebuffer(fbo); 351 } 352 353 const GLenum attachments[] = { GL_COLOR_ATTACHMENT0 }; 354 glDiscardFramebufferEXT(GL_FRAMEBUFFER, 1, attachments); 355 356 if (fbo != previousFbo) { 357 renderState.bindFramebuffer(previousFbo); 358 } 359 } 360 } 361 #endif 362 } 363 364 bool LayerRenderer::copyLayer(RenderState& renderState, Layer* layer, SkBitmap* bitmap) { 365 Caches& caches = Caches::getInstance(); 366 if (layer && bitmap->width() <= caches.maxTextureSize && 367 bitmap->height() <= caches.maxTextureSize) { 368 369 GLuint fbo = caches.fboCache.get(); 370 if (!fbo) { 371 ALOGW("Could not obtain an FBO"); 372 return false; 373 } 374 375 SkAutoLockPixels alp(*bitmap); 376 377 GLuint texture; 378 GLuint previousFbo; 379 GLsizei previousViewportWidth; 380 GLsizei previousViewportHeight; 381 382 GLenum format; 383 GLenum type; 384 385 GLenum error = GL_NO_ERROR; 386 bool status = false; 387 388 switch (bitmap->colorType()) { 389 case kAlpha_8_SkColorType: 390 format = GL_ALPHA; 391 type = GL_UNSIGNED_BYTE; 392 break; 393 case kRGB_565_SkColorType: 394 format = GL_RGB; 395 type = GL_UNSIGNED_SHORT_5_6_5; 396 break; 397 case kARGB_4444_SkColorType: 398 format = GL_RGBA; 399 type = GL_UNSIGNED_SHORT_4_4_4_4; 400 break; 401 case kN32_SkColorType: 402 default: 403 format = GL_RGBA; 404 type = GL_UNSIGNED_BYTE; 405 break; 406 } 407 408 float alpha = layer->getAlpha(); 409 SkXfermode::Mode mode = layer->getMode(); 410 GLuint previousLayerFbo = layer->getFbo(); 411 412 layer->setAlpha(255, SkXfermode::kSrc_Mode); 413 layer->setFbo(fbo); 414 415 previousFbo = renderState.getFramebuffer(); 416 renderState.getViewport(&previousViewportWidth, &previousViewportHeight); 417 renderState.bindFramebuffer(fbo); 418 419 glGenTextures(1, &texture); 420 if ((error = glGetError()) != GL_NO_ERROR) goto error; 421 422 caches.activeTexture(0); 423 caches.bindTexture(texture); 424 425 glPixelStorei(GL_PACK_ALIGNMENT, bitmap->bytesPerPixel()); 426 427 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 428 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); 429 430 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 431 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 432 433 glTexImage2D(GL_TEXTURE_2D, 0, format, bitmap->width(), bitmap->height(), 434 0, format, type, NULL); 435 if ((error = glGetError()) != GL_NO_ERROR) goto error; 436 437 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, 438 GL_TEXTURE_2D, texture, 0); 439 if ((error = glGetError()) != GL_NO_ERROR) goto error; 440 441 { 442 LayerRenderer renderer(renderState, layer); 443 renderer.setViewport(bitmap->width(), bitmap->height()); 444 renderer.OpenGLRenderer::prepareDirty(0.0f, 0.0f, 445 bitmap->width(), bitmap->height(), !layer->isBlend()); 446 447 caches.disableScissor(); 448 renderer.translate(0.0f, bitmap->height()); 449 renderer.scale(1.0f, -1.0f); 450 451 mat4 texTransform(layer->getTexTransform()); 452 453 mat4 invert; 454 invert.translate(0.0f, 1.0f); 455 invert.scale(1.0f, -1.0f, 1.0f); 456 layer->getTexTransform().multiply(invert); 457 458 if ((error = glGetError()) != GL_NO_ERROR) goto error; 459 460 { 461 Rect bounds; 462 bounds.set(0.0f, 0.0f, bitmap->width(), bitmap->height()); 463 renderer.drawTextureLayer(layer, bounds); 464 465 glReadPixels(0, 0, bitmap->width(), bitmap->height(), format, 466 type, bitmap->getPixels()); 467 468 if ((error = glGetError()) != GL_NO_ERROR) goto error; 469 } 470 471 layer->getTexTransform().load(texTransform); 472 status = true; 473 } 474 475 error: 476 #if DEBUG_OPENGL 477 if (error != GL_NO_ERROR) { 478 ALOGD("GL error while copying layer into bitmap = 0x%x", error); 479 } 480 #endif 481 482 renderState.bindFramebuffer(previousFbo); 483 layer->setAlpha(alpha, mode); 484 layer->setFbo(previousLayerFbo); 485 caches.deleteTexture(texture); 486 caches.fboCache.put(fbo); 487 renderState.setViewport(previousViewportWidth, previousViewportHeight); 488 489 return status; 490 } 491 return false; 492 } 493 494 }; // namespace uirenderer 495 }; // namespace android 496
