LayerRenderer.cpp revision c08f4ad7859f4ad1685deb23d74afc792686dc28
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 "LayerCache.h" 21#include "LayerRenderer.h" 22#include "Matrix.h" 23#include "Properties.h" 24#include "Rect.h" 25#include "renderstate/RenderState.h" 26#include "utils/TraceUtils.h" 27 28#include <ui/Rect.h> 29 30#include <private/hwui/DrawGlInfo.h> 31 32 33namespace android { 34namespace uirenderer { 35 36/////////////////////////////////////////////////////////////////////////////// 37// Rendering 38/////////////////////////////////////////////////////////////////////////////// 39 40LayerRenderer::LayerRenderer(RenderState& renderState, Layer* layer) 41 : OpenGLRenderer(renderState) 42 , mLayer(layer) { 43} 44 45LayerRenderer::~LayerRenderer() { 46} 47 48void LayerRenderer::prepareDirty(float left, float top, float right, float bottom, 49 bool opaque) { 50 LAYER_RENDERER_LOGD("Rendering into layer, fbo = %d", mLayer->getFbo()); 51 52 mRenderState.bindFramebuffer(mLayer->getFbo()); 53 54 const float width = mLayer->layer.getWidth(); 55 const float height = mLayer->layer.getHeight(); 56 57 Rect dirty(left, top, right, bottom); 58 if (dirty.isEmpty() || (dirty.left <= 0 && dirty.top <= 0 && 59 dirty.right >= width && dirty.bottom >= height)) { 60 mLayer->region.clear(); 61 dirty.set(0.0f, 0.0f, width, height); 62 } else { 63 dirty.intersect(0.0f, 0.0f, width, height); 64 android::Rect r(dirty.left, dirty.top, dirty.right, dirty.bottom); 65 mLayer->region.subtractSelf(r); 66 } 67 mLayer->clipRect.set(dirty); 68 69 OpenGLRenderer::prepareDirty(dirty.left, dirty.top, dirty.right, dirty.bottom, opaque); 70} 71 72void LayerRenderer::clear(float left, float top, float right, float bottom, bool opaque) { 73 if (mLayer->isDirty()) { 74 mRenderState.scissor().setEnabled(false); 75 glClear(GL_COLOR_BUFFER_BIT); 76 77 mRenderState.scissor().reset(); 78 mLayer->setDirty(false); 79 } else { 80 OpenGLRenderer::clear(left, top, right, bottom, opaque); 81 } 82} 83 84bool LayerRenderer::finish() { 85 bool retval = 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 return retval; 94} 95 96GLuint LayerRenderer::getTargetFbo() const { 97 return mLayer->getFbo(); 98} 99 100bool LayerRenderer::suppressErrorChecks() const { 101 return true; 102} 103 104/////////////////////////////////////////////////////////////////////////////// 105// Layer support 106/////////////////////////////////////////////////////////////////////////////// 107 108bool LayerRenderer::hasLayer() const { 109 return true; 110} 111 112void LayerRenderer::ensureStencilBuffer() { 113 attachStencilBufferToLayer(mLayer); 114} 115 116/////////////////////////////////////////////////////////////////////////////// 117// Dirty region tracking 118/////////////////////////////////////////////////////////////////////////////// 119 120Region* LayerRenderer::getRegion() const { 121 if (mState.currentFlags() & Snapshot::kFlagFboTarget) { 122 return OpenGLRenderer::getRegion(); 123 } 124 return &mLayer->region; 125} 126 127// TODO: This implementation uses a very simple approach to fixing T-junctions which keeps the 128// results as rectangles, and is thus not necessarily efficient in the geometry 129// produced. Eventually, it may be better to develop triangle-based mechanism. 130void LayerRenderer::generateMesh() { 131 if (mLayer->region.isRect() || mLayer->region.isEmpty()) { 132 if (mLayer->mesh) { 133 delete[] mLayer->mesh; 134 mLayer->mesh = nullptr; 135 mLayer->meshElementCount = 0; 136 } 137 138 mLayer->setRegionAsRect(); 139 return; 140 } 141 142 // avoid T-junctions as they cause artifacts in between the resultant 143 // geometry when complex transforms occur. 144 // TODO: generate the safeRegion only if necessary based on drawing transform (see 145 // OpenGLRenderer::composeLayerRegion()) 146 Region safeRegion = Region::createTJunctionFreeRegion(mLayer->region); 147 148 size_t count; 149 const android::Rect* rects = safeRegion.getArray(&count); 150 151 GLsizei elementCount = count * 6; 152 153 if (mLayer->mesh && mLayer->meshElementCount < elementCount) { 154 delete[] mLayer->mesh; 155 mLayer->mesh = nullptr; 156 } 157 158 if (!mLayer->mesh) { 159 mLayer->mesh = new TextureVertex[count * 4]; 160 } 161 mLayer->meshElementCount = elementCount; 162 163 const float texX = 1.0f / float(mLayer->getWidth()); 164 const float texY = 1.0f / float(mLayer->getHeight()); 165 const float height = mLayer->layer.getHeight(); 166 167 TextureVertex* mesh = mLayer->mesh; 168 169 for (size_t i = 0; i < count; i++) { 170 const android::Rect* r = &rects[i]; 171 172 const float u1 = r->left * texX; 173 const float v1 = (height - r->top) * texY; 174 const float u2 = r->right * texX; 175 const float v2 = (height - r->bottom) * texY; 176 177 TextureVertex::set(mesh++, r->left, r->top, u1, v1); 178 TextureVertex::set(mesh++, r->right, r->top, u2, v1); 179 TextureVertex::set(mesh++, r->left, r->bottom, u1, v2); 180 TextureVertex::set(mesh++, r->right, r->bottom, u2, v2); 181 } 182} 183 184/////////////////////////////////////////////////////////////////////////////// 185// Layers management 186/////////////////////////////////////////////////////////////////////////////// 187 188Layer* LayerRenderer::createRenderLayer(RenderState& renderState, uint32_t width, uint32_t height) { 189 ATRACE_FORMAT("Allocate %ux%u HW Layer", width, height); 190 LAYER_RENDERER_LOGD("Requesting new render layer %dx%d", width, height); 191 192 Caches& caches = Caches::getInstance(); 193 GLuint fbo = caches.fboCache.get(); 194 if (!fbo) { 195 ALOGW("Could not obtain an FBO"); 196 return nullptr; 197 } 198 199 caches.textureState().activateTexture(0); 200 Layer* layer = caches.layerCache.get(renderState, width, height); 201 if (!layer) { 202 ALOGW("Could not obtain a layer"); 203 return nullptr; 204 } 205 206 // We first obtain a layer before comparing against the max texture size 207 // because layers are not allocated at the exact desired size. They are 208 // always created slighly larger to improve recycling 209 const uint32_t maxTextureSize = caches.maxTextureSize; 210 if (layer->getWidth() > maxTextureSize || layer->getHeight() > maxTextureSize) { 211 ALOGW("Layer exceeds max. dimensions supported by the GPU (%dx%d, max=%dx%d)", 212 width, height, maxTextureSize, maxTextureSize); 213 214 // Creating a new layer always increment its refcount by 1, this allows 215 // us to destroy the layer object if one was created for us 216 layer->decStrong(nullptr); 217 218 return nullptr; 219 } 220 221 layer->setFbo(fbo); 222 layer->layer.set(0.0f, 0.0f, width, height); 223 layer->texCoords.set(0.0f, height / float(layer->getHeight()), 224 width / float(layer->getWidth()), 0.0f); 225 layer->setAlpha(255, SkXfermode::kSrcOver_Mode); 226 layer->setColorFilter(nullptr); 227 layer->setDirty(true); 228 layer->region.clear(); 229 230 GLuint previousFbo = renderState.getFramebuffer(); 231 232 renderState.bindFramebuffer(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 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 257bool 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 273Layer* LayerRenderer::createTextureLayer(RenderState& renderState) { 274 LAYER_RENDERER_LOGD("Creating new texture layer"); 275 276 Layer* layer = new Layer(Layer::kType_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 289void LayerRenderer::updateTextureLayer(Layer* layer, uint32_t width, uint32_t height, 290 bool isOpaque, bool forceFilter, GLenum renderTarget, 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 309void 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 329void 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 354bool LayerRenderer::copyLayer(RenderState& renderState, Layer* layer, SkBitmap* bitmap) { 355 Caches& caches = Caches::getInstance(); 356 if (layer 357 && bitmap->width() <= caches.maxTextureSize 358 && bitmap->height() <= caches.maxTextureSize) { 359 360 GLuint fbo = caches.fboCache.get(); 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 GLenum error = GL_NO_ERROR; 377 bool status = false; 378 379 switch (bitmap->colorType()) { 380 case kAlpha_8_SkColorType: 381 format = GL_ALPHA; 382 type = GL_UNSIGNED_BYTE; 383 break; 384 case kRGB_565_SkColorType: 385 format = GL_RGB; 386 type = GL_UNSIGNED_SHORT_5_6_5; 387 break; 388 case kARGB_4444_SkColorType: 389 format = GL_RGBA; 390 type = GL_UNSIGNED_SHORT_4_4_4_4; 391 break; 392 case kN32_SkColorType: 393 default: 394 format = GL_RGBA; 395 type = GL_UNSIGNED_BYTE; 396 break; 397 } 398 399 float alpha = layer->getAlpha(); 400 SkXfermode::Mode mode = layer->getMode(); 401 GLuint previousLayerFbo = layer->getFbo(); 402 403 layer->setAlpha(255, SkXfermode::kSrc_Mode); 404 layer->setFbo(fbo); 405 406 previousFbo = renderState.getFramebuffer(); 407 renderState.getViewport(&previousViewportWidth, &previousViewportHeight); 408 renderState.bindFramebuffer(fbo); 409 410 glGenTextures(1, &texture); 411 if ((error = glGetError()) != GL_NO_ERROR) goto error; 412 413 caches.textureState().activateTexture(0); 414 caches.textureState().bindTexture(texture); 415 416 glPixelStorei(GL_PACK_ALIGNMENT, bitmap->bytesPerPixel()); 417 418 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 419 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); 420 421 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 422 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 423 424 glTexImage2D(GL_TEXTURE_2D, 0, format, bitmap->width(), bitmap->height(), 425 0, format, type, nullptr); 426 if ((error = glGetError()) != GL_NO_ERROR) goto error; 427 428 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, 429 GL_TEXTURE_2D, texture, 0); 430 if ((error = glGetError()) != GL_NO_ERROR) goto error; 431 432 { 433 LayerRenderer renderer(renderState, layer); 434 renderer.setViewport(bitmap->width(), bitmap->height()); 435 renderer.OpenGLRenderer::prepareDirty(0.0f, 0.0f, 436 bitmap->width(), bitmap->height(), !layer->isBlend()); 437 438 renderState.scissor().setEnabled(false); 439 renderer.translate(0.0f, bitmap->height()); 440 renderer.scale(1.0f, -1.0f); 441 442 if ((error = glGetError()) != GL_NO_ERROR) goto error; 443 444 { 445 Rect bounds; 446 bounds.set(0.0f, 0.0f, bitmap->width(), bitmap->height()); 447 renderer.drawTextureLayer(layer, bounds); 448 449 glReadPixels(0, 0, bitmap->width(), bitmap->height(), format, 450 type, bitmap->getPixels()); 451 452 if ((error = glGetError()) != GL_NO_ERROR) goto error; 453 } 454 455 status = true; 456 } 457 458error: 459#if DEBUG_OPENGL 460 if (error != GL_NO_ERROR) { 461 ALOGD("GL error while copying layer into bitmap = 0x%x", error); 462 } 463#endif 464 465 renderState.bindFramebuffer(previousFbo); 466 layer->setAlpha(alpha, mode); 467 layer->setFbo(previousLayerFbo); 468 caches.textureState().deleteTexture(texture); 469 caches.fboCache.put(fbo); 470 renderState.setViewport(previousViewportWidth, previousViewportHeight); 471 472 return status; 473 } 474 return false; 475} 476 477}; // namespace uirenderer 478}; // namespace android 479