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 <private/hwui/DrawGlInfo.h> 22 23 #include "LayerCache.h" 24 #include "LayerRenderer.h" 25 #include "Matrix.h" 26 #include "Properties.h" 27 #include "Rect.h" 28 29 namespace android { 30 namespace uirenderer { 31 32 /////////////////////////////////////////////////////////////////////////////// 33 // Rendering 34 /////////////////////////////////////////////////////////////////////////////// 35 36 LayerRenderer::LayerRenderer(Layer* layer): mLayer(layer) { 37 } 38 39 LayerRenderer::~LayerRenderer() { 40 } 41 42 void LayerRenderer::setViewport(int width, int height) { 43 initViewport(width, height); 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 glBindFramebuffer(GL_FRAMEBUFFER, 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 GLint 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 (getSnapshot()->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::createLayer(uint32_t width, uint32_t height, bool isOpaque) { 188 LAYER_RENDERER_LOGD("Requesting new render layer %dx%d", width, height); 189 190 Caches& caches = Caches::getInstance(); 191 GLuint fbo = caches.fboCache.get(); 192 if (!fbo) { 193 ALOGW("Could not obtain an FBO"); 194 return NULL; 195 } 196 197 caches.activeTexture(0); 198 Layer* layer = caches.layerCache.get(width, height); 199 if (!layer) { 200 ALOGW("Could not obtain a layer"); 201 return NULL; 202 } 203 204 // We first obtain a layer before comparing against the max texture size 205 // because layers are not allocated at the exact desired size. They are 206 // always created slighly larger to improve recycling 207 const uint32_t maxTextureSize = caches.maxTextureSize; 208 if (layer->getWidth() > maxTextureSize || layer->getHeight() > maxTextureSize) { 209 ALOGW("Layer exceeds max. dimensions supported by the GPU (%dx%d, max=%dx%d)", 210 width, height, maxTextureSize, maxTextureSize); 211 212 // Creating a new layer always increment its refcount by 1, this allows 213 // us to destroy the layer object if one was created for us 214 Caches::getInstance().resourceCache.decrementRefcount(layer); 215 216 return NULL; 217 } 218 219 layer->setFbo(fbo); 220 layer->layer.set(0.0f, 0.0f, width, height); 221 layer->texCoords.set(0.0f, height / float(layer->getHeight()), 222 width / float(layer->getWidth()), 0.0f); 223 layer->setAlpha(255, SkXfermode::kSrcOver_Mode); 224 layer->setBlend(!isOpaque); 225 layer->setColorFilter(NULL); 226 layer->setDirty(true); 227 layer->region.clear(); 228 229 GLuint previousFbo; 230 glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &previousFbo); 231 232 glBindFramebuffer(GL_FRAMEBUFFER, layer->getFbo()); 233 layer->bindTexture(); 234 235 // Initialize the texture if needed 236 if (layer->isEmpty()) { 237 layer->setEmpty(false); 238 layer->allocateTexture(); 239 240 // This should only happen if we run out of memory 241 if (glGetError() != GL_NO_ERROR) { 242 ALOGE("Could not allocate texture for layer (fbo=%d %dx%d)", fbo, width, height); 243 glBindFramebuffer(GL_FRAMEBUFFER, previousFbo); 244 caches.resourceCache.decrementRefcount(layer); 245 return NULL; 246 } 247 } 248 249 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 250 layer->getTexture(), 0); 251 252 glBindFramebuffer(GL_FRAMEBUFFER, previousFbo); 253 254 return layer; 255 } 256 257 bool LayerRenderer::resizeLayer(Layer* layer, uint32_t width, uint32_t height) { 258 if (layer) { 259 LAYER_RENDERER_LOGD("Resizing layer fbo = %d to %dx%d", layer->getFbo(), width, height); 260 261 if (layer->resize(width, height)) { 262 layer->layer.set(0.0f, 0.0f, width, height); 263 layer->texCoords.set(0.0f, height / float(layer->getHeight()), 264 width / float(layer->getWidth()), 0.0f); 265 } else { 266 return false; 267 } 268 } 269 270 return true; 271 } 272 273 Layer* LayerRenderer::createTextureLayer(bool isOpaque) { 274 LAYER_RENDERER_LOGD("Creating new texture layer"); 275 276 Layer* layer = new Layer(0, 0); 277 layer->setCacheable(false); 278 layer->setTextureLayer(true); 279 layer->setBlend(!isOpaque); 280 layer->setEmpty(true); 281 layer->setFbo(0); 282 layer->setAlpha(255, SkXfermode::kSrcOver_Mode); 283 layer->layer.set(0.0f, 0.0f, 0.0f, 0.0f); 284 layer->texCoords.set(0.0f, 1.0f, 1.0f, 0.0f); 285 layer->region.clear(); 286 layer->setRenderTarget(GL_NONE); // see ::updateTextureLayer() 287 288 Caches::getInstance().activeTexture(0); 289 layer->generateTexture(); 290 291 return layer; 292 } 293 294 void LayerRenderer::updateTextureLayer(Layer* layer, uint32_t width, uint32_t height, 295 bool isOpaque, GLenum renderTarget, float* transform) { 296 if (layer) { 297 layer->setBlend(!isOpaque); 298 layer->setSize(width, height); 299 layer->layer.set(0.0f, 0.0f, width, height); 300 layer->region.set(width, height); 301 layer->regionRect.set(0.0f, 0.0f, width, height); 302 layer->getTexTransform().load(transform); 303 304 if (renderTarget != layer->getRenderTarget()) { 305 layer->setRenderTarget(renderTarget); 306 layer->bindTexture(); 307 layer->setFilter(GL_NEAREST, false, true); 308 layer->setWrap(GL_CLAMP_TO_EDGE, false, true); 309 } 310 } 311 } 312 313 void LayerRenderer::destroyLayer(Layer* layer) { 314 if (layer) { 315 LAYER_RENDERER_LOGD("Recycling layer, %dx%d fbo = %d", 316 layer->getWidth(), layer->getHeight(), layer->getFbo()); 317 318 if (!Caches::getInstance().layerCache.put(layer)) { 319 LAYER_RENDERER_LOGD(" Destroyed!"); 320 Caches::getInstance().resourceCache.decrementRefcount(layer); 321 } else { 322 LAYER_RENDERER_LOGD(" Cached!"); 323 #if DEBUG_LAYER_RENDERER 324 Caches::getInstance().layerCache.dump(); 325 #endif 326 layer->removeFbo(); 327 layer->region.clear(); 328 } 329 } 330 } 331 332 void LayerRenderer::destroyLayerDeferred(Layer* layer) { 333 if (layer) { 334 LAYER_RENDERER_LOGD("Deferring layer destruction, fbo = %d", layer->getFbo()); 335 336 Caches::getInstance().deleteLayerDeferred(layer); 337 } 338 } 339 340 void LayerRenderer::flushLayer(Layer* layer) { 341 #ifdef GL_EXT_discard_framebuffer 342 GLuint fbo = layer->getFbo(); 343 if (layer && fbo) { 344 // If possible, discard any enqueud operations on deferred 345 // rendering architectures 346 if (Extensions::getInstance().hasDiscardFramebuffer()) { 347 GLuint previousFbo; 348 glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &previousFbo); 349 if (fbo != previousFbo) glBindFramebuffer(GL_FRAMEBUFFER, fbo); 350 351 const GLenum attachments[] = { GL_COLOR_ATTACHMENT0 }; 352 glDiscardFramebufferEXT(GL_FRAMEBUFFER, 1, attachments); 353 354 if (fbo != previousFbo) glBindFramebuffer(GL_FRAMEBUFFER, previousFbo); 355 } 356 } 357 #endif 358 } 359 360 bool LayerRenderer::copyLayer(Layer* layer, SkBitmap* bitmap) { 361 Caches& caches = Caches::getInstance(); 362 if (layer && bitmap->width() <= caches.maxTextureSize && 363 bitmap->height() <= caches.maxTextureSize) { 364 365 GLuint fbo = caches.fboCache.get(); 366 if (!fbo) { 367 ALOGW("Could not obtain an FBO"); 368 return false; 369 } 370 371 SkAutoLockPixels alp(*bitmap); 372 373 GLuint texture; 374 GLuint previousFbo; 375 GLuint previousViewport[4]; 376 377 GLenum format; 378 GLenum type; 379 380 GLenum error = GL_NO_ERROR; 381 bool status = false; 382 383 switch (bitmap->config()) { 384 case SkBitmap::kA8_Config: 385 format = GL_ALPHA; 386 type = GL_UNSIGNED_BYTE; 387 break; 388 case SkBitmap::kRGB_565_Config: 389 format = GL_RGB; 390 type = GL_UNSIGNED_SHORT_5_6_5; 391 break; 392 case SkBitmap::kARGB_4444_Config: 393 format = GL_RGBA; 394 type = GL_UNSIGNED_SHORT_4_4_4_4; 395 break; 396 case SkBitmap::kARGB_8888_Config: 397 default: 398 format = GL_RGBA; 399 type = GL_UNSIGNED_BYTE; 400 break; 401 } 402 403 float alpha = layer->getAlpha(); 404 SkXfermode::Mode mode = layer->getMode(); 405 GLuint previousLayerFbo = layer->getFbo(); 406 407 layer->setAlpha(255, SkXfermode::kSrc_Mode); 408 layer->setFbo(fbo); 409 410 glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &previousFbo); 411 glGetIntegerv(GL_VIEWPORT, (GLint*) &previousViewport); 412 glBindFramebuffer(GL_FRAMEBUFFER, fbo); 413 414 glGenTextures(1, &texture); 415 if ((error = glGetError()) != GL_NO_ERROR) goto error; 416 417 caches.activeTexture(0); 418 caches.bindTexture(texture); 419 420 glPixelStorei(GL_PACK_ALIGNMENT, bitmap->bytesPerPixel()); 421 422 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 423 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); 424 425 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 426 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 427 428 glTexImage2D(GL_TEXTURE_2D, 0, format, bitmap->width(), bitmap->height(), 429 0, format, type, NULL); 430 if ((error = glGetError()) != GL_NO_ERROR) goto error; 431 432 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, 433 GL_TEXTURE_2D, texture, 0); 434 if ((error = glGetError()) != GL_NO_ERROR) goto error; 435 436 { 437 LayerRenderer renderer(layer); 438 renderer.setViewport(bitmap->width(), bitmap->height()); 439 renderer.OpenGLRenderer::prepareDirty(0.0f, 0.0f, 440 bitmap->width(), bitmap->height(), !layer->isBlend()); 441 442 caches.disableScissor(); 443 renderer.translate(0.0f, bitmap->height()); 444 renderer.scale(1.0f, -1.0f); 445 446 mat4 texTransform(layer->getTexTransform()); 447 448 mat4 invert; 449 invert.translate(0.0f, 1.0f); 450 invert.scale(1.0f, -1.0f, 1.0f); 451 layer->getTexTransform().multiply(invert); 452 453 if ((error = glGetError()) != GL_NO_ERROR) goto error; 454 455 { 456 Rect bounds; 457 bounds.set(0.0f, 0.0f, bitmap->width(), bitmap->height()); 458 renderer.drawTextureLayer(layer, bounds); 459 460 glReadPixels(0, 0, bitmap->width(), bitmap->height(), format, 461 type, bitmap->getPixels()); 462 463 if ((error = glGetError()) != GL_NO_ERROR) goto error; 464 } 465 466 layer->getTexTransform().load(texTransform); 467 status = true; 468 } 469 470 error: 471 #if DEBUG_OPENGL 472 if (error != GL_NO_ERROR) { 473 ALOGD("GL error while copying layer into bitmap = 0x%x", error); 474 } 475 #endif 476 477 glBindFramebuffer(GL_FRAMEBUFFER, previousFbo); 478 layer->setAlpha(alpha, mode); 479 layer->setFbo(previousLayerFbo); 480 caches.deleteTexture(texture); 481 caches.fboCache.put(fbo); 482 glViewport(previousViewport[0], previousViewport[1], 483 previousViewport[2], previousViewport[3]); 484 485 return status; 486 } 487 return false; 488 } 489 490 }; // namespace uirenderer 491 }; // namespace android 492
