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(int viewportWidth, int viewportHeight, 47 float left, float top, float right, float bottom, 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.doIntersect(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(viewportWidth, viewportHeight, 68 dirty.left, dirty.top, dirty.right, dirty.bottom, opaque); 69 } 70 71 void LayerRenderer::clear(float left, float top, float right, float bottom, bool opaque) { 72 if (mLayer->isDirty()) { 73 mRenderState.scissor().setEnabled(false); 74 glClear(GL_COLOR_BUFFER_BIT); 75 76 mRenderState.scissor().reset(); 77 mLayer->setDirty(false); 78 } else { 79 OpenGLRenderer::clear(left, top, right, bottom, opaque); 80 } 81 } 82 83 bool LayerRenderer::finish() { 84 bool retval = OpenGLRenderer::finish(); 85 86 generateMesh(); 87 88 LAYER_RENDERER_LOGD("Finished rendering into layer, fbo = %d", mLayer->getFbo()); 89 90 // No need to unbind our FBO, this will be taken care of by the caller 91 // who will invoke OpenGLRenderer::resume() 92 return retval; 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 (mState.currentFlags() & 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 = nullptr; 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 = nullptr; 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_FORMAT("Allocate %ux%u HW Layer", width, height); 189 LAYER_RENDERER_LOGD("Requesting new render layer %dx%d", width, height); 190 191 Caches& caches = Caches::getInstance(); 192 GLuint fbo = renderState.createFramebuffer(); 193 if (!fbo) { 194 ALOGW("Could not obtain an FBO"); 195 return nullptr; 196 } 197 198 caches.textureState().activateTexture(0); 199 Layer* layer = caches.layerCache.get(renderState, width, height); 200 if (!layer) { 201 ALOGW("Could not obtain a layer"); 202 return nullptr; 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 slightly 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 layer->decStrong(nullptr); 216 217 return nullptr; 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(nullptr); 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 (CC_UNLIKELY(GLUtils::dumpGLErrors())) { 241 LOG_ALWAYS_FATAL("Could not allocate texture for layer (fbo=%d %dx%d)", 242 fbo, width, height); 243 renderState.bindFramebuffer(previousFbo); 244 layer->decStrong(nullptr); 245 return nullptr; 246 } 247 } 248 249 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 250 layer->getTextureId(), 0); 251 252 renderState.bindFramebuffer(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(RenderState& renderState) { 274 LAYER_RENDERER_LOGD("Creating new texture layer"); 275 276 Layer* layer = new Layer(Layer::Type::Texture, renderState, 0, 0); 277 layer->setCacheable(false); 278 layer->layer.set(0.0f, 0.0f, 0.0f, 0.0f); 279 layer->texCoords.set(0.0f, 1.0f, 1.0f, 0.0f); 280 layer->region.clear(); 281 layer->setRenderTarget(GL_NONE); // see ::updateTextureLayer() 282 283 Caches::getInstance().textureState().activateTexture(0); 284 layer->generateTexture(); 285 286 return layer; 287 } 288 289 void LayerRenderer::updateTextureLayer(Layer* layer, uint32_t width, uint32_t height, 290 bool isOpaque, bool forceFilter, GLenum renderTarget, const float* textureTransform) { 291 if (layer) { 292 layer->setBlend(!isOpaque); 293 layer->setForceFilter(forceFilter); 294 layer->setSize(width, height); 295 layer->layer.set(0.0f, 0.0f, width, height); 296 layer->region.set(width, height); 297 layer->regionRect.set(0.0f, 0.0f, width, height); 298 layer->getTexTransform().load(textureTransform); 299 300 if (renderTarget != layer->getRenderTarget()) { 301 layer->setRenderTarget(renderTarget); 302 layer->bindTexture(); 303 layer->setFilter(GL_NEAREST, false, true); 304 layer->setWrap(GL_CLAMP_TO_EDGE, false, true); 305 } 306 } 307 } 308 309 void LayerRenderer::destroyLayer(Layer* layer) { 310 if (layer) { 311 ATRACE_FORMAT("Destroy %ux%u HW Layer", layer->getWidth(), layer->getHeight()); 312 LAYER_RENDERER_LOGD("Recycling layer, %dx%d fbo = %d", 313 layer->getWidth(), layer->getHeight(), layer->getFbo()); 314 315 if (!Caches::getInstance().layerCache.put(layer)) { 316 LAYER_RENDERER_LOGD(" Destroyed!"); 317 layer->decStrong(nullptr); 318 } else { 319 LAYER_RENDERER_LOGD(" Cached!"); 320 #if DEBUG_LAYER_RENDERER 321 Caches::getInstance().layerCache.dump(); 322 #endif 323 layer->removeFbo(); 324 layer->region.clear(); 325 } 326 } 327 } 328 329 void LayerRenderer::flushLayer(RenderState& renderState, Layer* layer) { 330 #ifdef GL_EXT_discard_framebuffer 331 if (!layer) return; 332 333 GLuint fbo = layer->getFbo(); 334 if (fbo) { 335 // If possible, discard any enqueud operations on deferred 336 // rendering architectures 337 if (Caches::getInstance().extensions().hasDiscardFramebuffer()) { 338 GLuint previousFbo = renderState.getFramebuffer(); 339 if (fbo != previousFbo) { 340 renderState.bindFramebuffer(fbo); 341 } 342 343 const GLenum attachments[] = { GL_COLOR_ATTACHMENT0 }; 344 glDiscardFramebufferEXT(GL_FRAMEBUFFER, 1, attachments); 345 346 if (fbo != previousFbo) { 347 renderState.bindFramebuffer(previousFbo); 348 } 349 } 350 } 351 #endif 352 } 353 354 bool LayerRenderer::copyLayer(RenderState& renderState, Layer* layer, SkBitmap* bitmap) { 355 Caches& caches = Caches::getInstance(); 356 if (layer && layer->isRenderable() 357 && bitmap->width() <= caches.maxTextureSize 358 && bitmap->height() <= caches.maxTextureSize) { 359 360 GLuint fbo = renderState.createFramebuffer(); 361 if (!fbo) { 362 ALOGW("Could not obtain an FBO"); 363 return false; 364 } 365 366 SkAutoLockPixels alp(*bitmap); 367 368 GLuint texture; 369 GLuint previousFbo; 370 GLsizei previousViewportWidth; 371 GLsizei previousViewportHeight; 372 373 GLenum format; 374 GLenum type; 375 376 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); 410 411 caches.textureState().activateTexture(0); 412 caches.textureState().bindTexture(texture); 413 414 glPixelStorei(GL_PACK_ALIGNMENT, bitmap->bytesPerPixel()); 415 416 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 417 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); 418 419 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 420 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 421 422 glTexImage2D(GL_TEXTURE_2D, 0, format, bitmap->width(), bitmap->height(), 423 0, format, type, nullptr); 424 425 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, 426 GL_TEXTURE_2D, texture, 0); 427 428 { 429 LayerRenderer renderer(renderState, layer); 430 renderer.OpenGLRenderer::prepareDirty(bitmap->width(), bitmap->height(), 431 0.0f, 0.0f, bitmap->width(), bitmap->height(), !layer->isBlend()); 432 433 renderState.scissor().setEnabled(false); 434 renderer.translate(0.0f, bitmap->height()); 435 renderer.scale(1.0f, -1.0f); 436 437 { 438 Rect bounds; 439 bounds.set(0.0f, 0.0f, bitmap->width(), bitmap->height()); 440 renderer.drawTextureLayer(layer, bounds); 441 442 glReadPixels(0, 0, bitmap->width(), bitmap->height(), format, 443 type, bitmap->getPixels()); 444 445 } 446 447 status = true; 448 } 449 450 renderState.bindFramebuffer(previousFbo); 451 layer->setAlpha(alpha, mode); 452 layer->setFbo(previousLayerFbo); 453 caches.textureState().deleteTexture(texture); 454 renderState.deleteFramebuffer(fbo); 455 renderState.setViewport(previousViewportWidth, previousViewportHeight); 456 457 GL_CHECKPOINT(MODERATE); 458 459 return status; 460 } 461 return false; 462 } 463 464 }; // namespace uirenderer 465 }; // namespace android 466
