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 #include "LayerCache.h" 18 #include "LayerRenderer.h" 19 #include "Matrix.h" 20 #include "Properties.h" 21 #include "Rect.h" 22 #include "renderstate/RenderState.h" 23 #include "utils/GLUtils.h" 24 #include "utils/TraceUtils.h" 25 26 #include <ui/Rect.h> 27 28 #include <private/hwui/DrawGlInfo.h> 29 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 void 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 mRenderState.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 OpenGLRenderer::prepareDirty(dirty.left, dirty.top, dirty.right, dirty.bottom, opaque); 68 } 69 70 void LayerRenderer::clear(float left, float top, float right, float bottom, bool opaque) { 71 if (mLayer->isDirty()) { 72 mRenderState.scissor().setEnabled(false); 73 glClear(GL_COLOR_BUFFER_BIT); 74 75 mRenderState.scissor().reset(); 76 mLayer->setDirty(false); 77 } else { 78 OpenGLRenderer::clear(left, top, right, bottom, opaque); 79 } 80 } 81 82 bool LayerRenderer::finish() { 83 bool retval = OpenGLRenderer::finish(); 84 85 generateMesh(); 86 87 LAYER_RENDERER_LOGD("Finished rendering into layer, fbo = %d", mLayer->getFbo()); 88 89 // No need to unbind our FBO, this will be taken care of by the caller 90 // who will invoke OpenGLRenderer::resume() 91 return retval; 92 } 93 94 GLuint LayerRenderer::getTargetFbo() const { 95 return mLayer->getFbo(); 96 } 97 98 bool LayerRenderer::suppressErrorChecks() const { 99 return true; 100 } 101 102 /////////////////////////////////////////////////////////////////////////////// 103 // Layer support 104 /////////////////////////////////////////////////////////////////////////////// 105 106 bool LayerRenderer::hasLayer() const { 107 return true; 108 } 109 110 void LayerRenderer::ensureStencilBuffer() { 111 attachStencilBufferToLayer(mLayer); 112 } 113 114 /////////////////////////////////////////////////////////////////////////////// 115 // Dirty region tracking 116 /////////////////////////////////////////////////////////////////////////////// 117 118 Region* LayerRenderer::getRegion() const { 119 if (mState.currentFlags() & Snapshot::kFlagFboTarget) { 120 return OpenGLRenderer::getRegion(); 121 } 122 return &mLayer->region; 123 } 124 125 // TODO: This implementation uses a very simple approach to fixing T-junctions which keeps the 126 // results as rectangles, and is thus not necessarily efficient in the geometry 127 // produced. Eventually, it may be better to develop triangle-based mechanism. 128 void LayerRenderer::generateMesh() { 129 if (mLayer->region.isRect() || mLayer->region.isEmpty()) { 130 if (mLayer->mesh) { 131 delete[] mLayer->mesh; 132 mLayer->mesh = nullptr; 133 mLayer->meshElementCount = 0; 134 } 135 136 mLayer->setRegionAsRect(); 137 return; 138 } 139 140 // avoid T-junctions as they cause artifacts in between the resultant 141 // geometry when complex transforms occur. 142 // TODO: generate the safeRegion only if necessary based on drawing transform (see 143 // OpenGLRenderer::composeLayerRegion()) 144 Region safeRegion = Region::createTJunctionFreeRegion(mLayer->region); 145 146 size_t count; 147 const android::Rect* rects = safeRegion.getArray(&count); 148 149 GLsizei elementCount = count * 6; 150 151 if (mLayer->mesh && mLayer->meshElementCount < elementCount) { 152 delete[] mLayer->mesh; 153 mLayer->mesh = nullptr; 154 } 155 156 if (!mLayer->mesh) { 157 mLayer->mesh = new TextureVertex[count * 4]; 158 } 159 mLayer->meshElementCount = elementCount; 160 161 const float texX = 1.0f / float(mLayer->getWidth()); 162 const float texY = 1.0f / float(mLayer->getHeight()); 163 const float height = mLayer->layer.getHeight(); 164 165 TextureVertex* mesh = mLayer->mesh; 166 167 for (size_t i = 0; i < count; i++) { 168 const android::Rect* r = &rects[i]; 169 170 const float u1 = r->left * texX; 171 const float v1 = (height - r->top) * texY; 172 const float u2 = r->right * texX; 173 const float v2 = (height - r->bottom) * texY; 174 175 TextureVertex::set(mesh++, r->left, r->top, u1, v1); 176 TextureVertex::set(mesh++, r->right, r->top, u2, v1); 177 TextureVertex::set(mesh++, r->left, r->bottom, u1, v2); 178 TextureVertex::set(mesh++, r->right, r->bottom, u2, v2); 179 } 180 } 181 182 /////////////////////////////////////////////////////////////////////////////// 183 // Layers management 184 /////////////////////////////////////////////////////////////////////////////// 185 186 Layer* LayerRenderer::createRenderLayer(RenderState& renderState, uint32_t width, uint32_t height) { 187 ATRACE_FORMAT("Allocate %ux%u HW Layer", width, height); 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 nullptr; 195 } 196 197 caches.textureState().activateTexture(0); 198 Layer* layer = caches.layerCache.get(renderState, width, height); 199 if (!layer) { 200 ALOGW("Could not obtain a layer"); 201 return nullptr; 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 layer->decStrong(nullptr); 215 216 return nullptr; 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->setColorFilter(nullptr); 225 layer->setDirty(true); 226 layer->region.clear(); 227 228 GLuint previousFbo = renderState.getFramebuffer(); 229 230 renderState.bindFramebuffer(layer->getFbo()); 231 layer->bindTexture(); 232 233 // Initialize the texture if needed 234 if (layer->isEmpty()) { 235 layer->setEmpty(false); 236 layer->allocateTexture(); 237 238 // This should only happen if we run out of memory 239 if (CC_UNLIKELY(GLUtils::dumpGLErrors())) { 240 LOG_ALWAYS_FATAL("Could not allocate texture for layer (fbo=%d %dx%d)", 241 fbo, width, height); 242 renderState.bindFramebuffer(previousFbo); 243 layer->decStrong(nullptr); 244 return nullptr; 245 } 246 } 247 248 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 249 layer->getTextureId(), 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->layer.set(0.0f, 0.0f, 0.0f, 0.0f); 278 layer->texCoords.set(0.0f, 1.0f, 1.0f, 0.0f); 279 layer->region.clear(); 280 layer->setRenderTarget(GL_NONE); // see ::updateTextureLayer() 281 282 Caches::getInstance().textureState().activateTexture(0); 283 layer->generateTexture(); 284 285 return layer; 286 } 287 288 void LayerRenderer::updateTextureLayer(Layer* layer, uint32_t width, uint32_t height, 289 bool isOpaque, bool forceFilter, GLenum renderTarget, float* textureTransform) { 290 if (layer) { 291 layer->setBlend(!isOpaque); 292 layer->setForceFilter(forceFilter); 293 layer->setSize(width, height); 294 layer->layer.set(0.0f, 0.0f, width, height); 295 layer->region.set(width, height); 296 layer->regionRect.set(0.0f, 0.0f, width, height); 297 layer->getTexTransform().load(textureTransform); 298 299 if (renderTarget != layer->getRenderTarget()) { 300 layer->setRenderTarget(renderTarget); 301 layer->bindTexture(); 302 layer->setFilter(GL_NEAREST, false, true); 303 layer->setWrap(GL_CLAMP_TO_EDGE, false, true); 304 } 305 } 306 } 307 308 void LayerRenderer::destroyLayer(Layer* layer) { 309 if (layer) { 310 ATRACE_FORMAT("Destroy %ux%u HW Layer", layer->getWidth(), layer->getHeight()); 311 LAYER_RENDERER_LOGD("Recycling layer, %dx%d fbo = %d", 312 layer->getWidth(), layer->getHeight(), layer->getFbo()); 313 314 if (!Caches::getInstance().layerCache.put(layer)) { 315 LAYER_RENDERER_LOGD(" Destroyed!"); 316 layer->decStrong(nullptr); 317 } else { 318 LAYER_RENDERER_LOGD(" Cached!"); 319 #if DEBUG_LAYER_RENDERER 320 Caches::getInstance().layerCache.dump(); 321 #endif 322 layer->removeFbo(); 323 layer->region.clear(); 324 } 325 } 326 } 327 328 void LayerRenderer::flushLayer(RenderState& renderState, Layer* layer) { 329 #ifdef GL_EXT_discard_framebuffer 330 if (!layer) return; 331 332 GLuint fbo = layer->getFbo(); 333 if (fbo) { 334 // If possible, discard any enqueud operations on deferred 335 // rendering architectures 336 if (Caches::getInstance().extensions().hasDiscardFramebuffer()) { 337 GLuint previousFbo = renderState.getFramebuffer(); 338 if (fbo != previousFbo) { 339 renderState.bindFramebuffer(fbo); 340 } 341 342 const GLenum attachments[] = { GL_COLOR_ATTACHMENT0 }; 343 glDiscardFramebufferEXT(GL_FRAMEBUFFER, 1, attachments); 344 345 if (fbo != previousFbo) { 346 renderState.bindFramebuffer(previousFbo); 347 } 348 } 349 } 350 #endif 351 } 352 353 bool LayerRenderer::copyLayer(RenderState& renderState, Layer* layer, SkBitmap* bitmap) { 354 Caches& caches = Caches::getInstance(); 355 if (layer 356 && bitmap->width() <= caches.maxTextureSize 357 && bitmap->height() <= caches.maxTextureSize) { 358 359 GLuint fbo = caches.fboCache.get(); 360 if (!fbo) { 361 ALOGW("Could not obtain an FBO"); 362 return false; 363 } 364 365 SkAutoLockPixels alp(*bitmap); 366 367 GLuint texture; 368 GLuint previousFbo; 369 GLsizei previousViewportWidth; 370 GLsizei previousViewportHeight; 371 372 GLenum format; 373 GLenum type; 374 375 GLenum error = GL_NO_ERROR; 376 bool status = false; 377 378 switch (bitmap->colorType()) { 379 case kAlpha_8_SkColorType: 380 format = GL_ALPHA; 381 type = GL_UNSIGNED_BYTE; 382 break; 383 case kRGB_565_SkColorType: 384 format = GL_RGB; 385 type = GL_UNSIGNED_SHORT_5_6_5; 386 break; 387 case kARGB_4444_SkColorType: 388 format = GL_RGBA; 389 type = GL_UNSIGNED_SHORT_4_4_4_4; 390 break; 391 case kN32_SkColorType: 392 default: 393 format = GL_RGBA; 394 type = GL_UNSIGNED_BYTE; 395 break; 396 } 397 398 float alpha = layer->getAlpha(); 399 SkXfermode::Mode mode = layer->getMode(); 400 GLuint previousLayerFbo = layer->getFbo(); 401 402 layer->setAlpha(255, SkXfermode::kSrc_Mode); 403 layer->setFbo(fbo); 404 405 previousFbo = renderState.getFramebuffer(); 406 renderState.getViewport(&previousViewportWidth, &previousViewportHeight); 407 renderState.bindFramebuffer(fbo); 408 409 glGenTextures(1, &texture); 410 if ((error = glGetError()) != GL_NO_ERROR) goto error; 411 412 caches.textureState().activateTexture(0); 413 caches.textureState().bindTexture(texture); 414 415 glPixelStorei(GL_PACK_ALIGNMENT, bitmap->bytesPerPixel()); 416 417 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 418 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); 419 420 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 421 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 422 423 glTexImage2D(GL_TEXTURE_2D, 0, format, bitmap->width(), bitmap->height(), 424 0, format, type, nullptr); 425 if ((error = glGetError()) != GL_NO_ERROR) goto error; 426 427 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, 428 GL_TEXTURE_2D, texture, 0); 429 if ((error = glGetError()) != GL_NO_ERROR) goto error; 430 431 { 432 LayerRenderer renderer(renderState, layer); 433 renderer.setViewport(bitmap->width(), bitmap->height()); 434 renderer.OpenGLRenderer::prepareDirty(0.0f, 0.0f, 435 bitmap->width(), bitmap->height(), !layer->isBlend()); 436 437 renderState.scissor().setEnabled(false); 438 renderer.translate(0.0f, bitmap->height()); 439 renderer.scale(1.0f, -1.0f); 440 441 if ((error = glGetError()) != GL_NO_ERROR) goto error; 442 443 { 444 Rect bounds; 445 bounds.set(0.0f, 0.0f, bitmap->width(), bitmap->height()); 446 renderer.drawTextureLayer(layer, bounds); 447 448 glReadPixels(0, 0, bitmap->width(), bitmap->height(), format, 449 type, bitmap->getPixels()); 450 451 if ((error = glGetError()) != GL_NO_ERROR) goto error; 452 } 453 454 status = true; 455 } 456 457 error: 458 #if DEBUG_OPENGL 459 if (error != GL_NO_ERROR) { 460 ALOGD("GL error while copying layer into bitmap = 0x%x", error); 461 } 462 #endif 463 464 renderState.bindFramebuffer(previousFbo); 465 layer->setAlpha(alpha, mode); 466 layer->setFbo(previousLayerFbo); 467 caches.textureState().deleteTexture(texture); 468 caches.fboCache.put(fbo); 469 renderState.setViewport(previousViewportWidth, previousViewportHeight); 470 471 return status; 472 } 473 return false; 474 } 475 476 }; // namespace uirenderer 477 }; // namespace android 478
