Layer.cpp revision 967dce306267109a6e8aec408b65609ac5642a03
1/* 2 * Copyright (C) 2007 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 <stdlib.h> 18#include <stdint.h> 19#include <sys/types.h> 20 21#include <cutils/properties.h> 22#include <cutils/native_handle.h> 23 24#include <utils/Errors.h> 25#include <utils/Log.h> 26#include <utils/StopWatch.h> 27 28#include <ui/GraphicBuffer.h> 29#include <ui/PixelFormat.h> 30 31#include <surfaceflinger/Surface.h> 32 33#include "clz.h" 34#include "Layer.h" 35#include "SurfaceFlinger.h" 36#include "DisplayHardware/DisplayHardware.h" 37 38 39#define DEBUG_RESIZE 0 40 41 42namespace android { 43 44template <typename T> inline T min(T a, T b) { 45 return a<b ? a : b; 46} 47 48// --------------------------------------------------------------------------- 49 50const uint32_t Layer::typeInfo = LayerBaseClient::typeInfo | 4; 51const char* const Layer::typeID = "Layer"; 52 53// --------------------------------------------------------------------------- 54 55Layer::Layer(SurfaceFlinger* flinger, DisplayID display, 56 const sp<Client>& c, int32_t i) 57 : LayerBaseClient(flinger, display, c, i), 58 mSecure(false), 59 mNoEGLImageForSwBuffers(false), 60 mNeedsBlending(true), 61 mNeedsDithering(false) 62{ 63 // no OpenGL operation is possible here, since we might not be 64 // in the OpenGL thread. 65 mFrontBufferIndex = lcblk->getFrontBuffer(); 66} 67 68Layer::~Layer() 69{ 70 destroy(); 71 // the actual buffers will be destroyed here 72} 73 74void Layer::destroy() 75{ 76 for (size_t i=0 ; i<NUM_BUFFERS ; i++) { 77 if (mTextures[i].name != -1U) { 78 glDeleteTextures(1, &mTextures[i].name); 79 mTextures[i].name = -1U; 80 } 81 if (mTextures[i].image != EGL_NO_IMAGE_KHR) { 82 EGLDisplay dpy(mFlinger->graphicPlane(0).getEGLDisplay()); 83 eglDestroyImageKHR(dpy, mTextures[i].image); 84 mTextures[i].image = EGL_NO_IMAGE_KHR; 85 } 86 Mutex::Autolock _l(mLock); 87 mBuffers[i].clear(); 88 mWidth = mHeight = 0; 89 } 90 mSurface.clear(); 91} 92 93sp<LayerBaseClient::Surface> Layer::createSurface() const 94{ 95 return mSurface; 96} 97 98status_t Layer::ditch() 99{ 100 // the layer is not on screen anymore. free as much resources as possible 101 mFreezeLock.clear(); 102 destroy(); 103 return NO_ERROR; 104} 105 106status_t Layer::setBuffers( uint32_t w, uint32_t h, 107 PixelFormat format, uint32_t flags) 108{ 109 // this surfaces pixel format 110 PixelFormatInfo info; 111 status_t err = getPixelFormatInfo(format, &info); 112 if (err) return err; 113 114 // the display's pixel format 115 const DisplayHardware& hw(graphicPlane(0).displayHardware()); 116 uint32_t const maxSurfaceDims = min( 117 hw.getMaxTextureSize(), hw.getMaxViewportDims()); 118 119 // never allow a surface larger than what our underlying GL implementation 120 // can handle. 121 if ((uint32_t(w)>maxSurfaceDims) || (uint32_t(h)>maxSurfaceDims)) { 122 return BAD_VALUE; 123 } 124 125 PixelFormatInfo displayInfo; 126 getPixelFormatInfo(hw.getFormat(), &displayInfo); 127 const uint32_t hwFlags = hw.getFlags(); 128 129 mFormat = format; 130 mWidth = w; 131 mHeight = h; 132 mSecure = (flags & ISurfaceComposer::eSecure) ? true : false; 133 mNeedsBlending = (info.h_alpha - info.l_alpha) > 0; 134 mNoEGLImageForSwBuffers = !(hwFlags & DisplayHardware::CACHED_BUFFERS); 135 136 // we use the red index 137 int displayRedSize = displayInfo.getSize(PixelFormatInfo::INDEX_RED); 138 int layerRedsize = info.getSize(PixelFormatInfo::INDEX_RED); 139 mNeedsDithering = layerRedsize > displayRedSize; 140 141 for (size_t i=0 ; i<NUM_BUFFERS ; i++) { 142 mBuffers[i] = new GraphicBuffer(); 143 } 144 mSurface = new SurfaceLayer(mFlinger, clientIndex(), this); 145 return NO_ERROR; 146} 147 148void Layer::reloadTexture(const Region& dirty) 149{ 150 Mutex::Autolock _l(mLock); 151 sp<GraphicBuffer> buffer(getFrontBufferLocked()); 152 if (buffer == NULL) { 153 // this situation can happen if we ran out of memory for instance. 154 // not much we can do. continue to use whatever texture was bound 155 // to this context. 156 return; 157 } 158 159 const int index = mFrontBufferIndex; 160 161 // create the new texture name if needed 162 if (UNLIKELY(mTextures[index].name == -1U)) { 163 mTextures[index].name = createTexture(); 164 mTextures[index].width = 0; 165 mTextures[index].height = 0; 166 } 167 168#ifdef EGL_ANDROID_image_native_buffer 169 if (mFlags & DisplayHardware::DIRECT_TEXTURE) { 170 if (buffer->usage & GraphicBuffer::USAGE_HW_TEXTURE) { 171 if (mTextures[index].dirty) { 172 if (initializeEglImage(buffer, &mTextures[index]) != NO_ERROR) { 173 // not sure what we can do here... 174 mFlags &= ~DisplayHardware::DIRECT_TEXTURE; 175 goto slowpath; 176 } 177 } 178 } else { 179 if (mHybridBuffer==0 || (mHybridBuffer->width != buffer->width || 180 mHybridBuffer->height != buffer->height)) { 181 mHybridBuffer.clear(); 182 mHybridBuffer = new GraphicBuffer( 183 buffer->width, buffer->height, buffer->format, 184 GraphicBuffer::USAGE_SW_WRITE_OFTEN | 185 GraphicBuffer::USAGE_HW_TEXTURE); 186 if (initializeEglImage( 187 mHybridBuffer, &mTextures[0]) != NO_ERROR) { 188 // not sure what we can do here... 189 mFlags &= ~DisplayHardware::DIRECT_TEXTURE; 190 mHybridBuffer.clear(); 191 goto slowpath; 192 } 193 } 194 195 GGLSurface t; 196 status_t res = buffer->lock(&t, GRALLOC_USAGE_SW_READ_OFTEN); 197 LOGE_IF(res, "error %d (%s) locking buffer %p", 198 res, strerror(res), buffer.get()); 199 if (res == NO_ERROR) { 200 Texture* const texture(&mTextures[0]); 201 202 glBindTexture(GL_TEXTURE_2D, texture->name); 203 204 sp<GraphicBuffer> buf(mHybridBuffer); 205 void* vaddr; 206 res = buf->lock(GraphicBuffer::USAGE_SW_WRITE_OFTEN, &vaddr); 207 if (res == NO_ERROR) { 208 int bpp = 0; 209 switch (t.format) { 210 case HAL_PIXEL_FORMAT_RGB_565: 211 case HAL_PIXEL_FORMAT_RGBA_4444: 212 bpp = 2; 213 break; 214 case HAL_PIXEL_FORMAT_RGBA_8888: 215 case HAL_PIXEL_FORMAT_RGBX_8888: 216 bpp = 4; 217 break; 218 default: 219 if (isSupportedYuvFormat(t.format)) { 220 // just show the Y plane of YUV buffers 221 bpp = 1; 222 break; 223 } 224 // oops, we don't handle this format! 225 LOGE("layer %p, texture=%d, using format %d, which is not " 226 "supported by the GL", this, texture->name, t.format); 227 } 228 if (bpp) { 229 const Rect bounds(dirty.getBounds()); 230 size_t src_stride = t.stride; 231 size_t dst_stride = buf->stride; 232 if (src_stride == dst_stride && 233 bounds.width() == t.width && 234 bounds.height() == t.height) 235 { 236 memcpy(vaddr, t.data, t.height * t.stride * bpp); 237 } else { 238 GLubyte const * src = t.data + 239 (bounds.left + bounds.top * src_stride) * bpp; 240 GLubyte * dst = (GLubyte *)vaddr + 241 (bounds.left + bounds.top * dst_stride) * bpp; 242 const size_t length = bounds.width() * bpp; 243 size_t h = bounds.height(); 244 src_stride *= bpp; 245 dst_stride *= bpp; 246 while (h--) { 247 memcpy(dst, src, length); 248 dst += dst_stride; 249 src += src_stride; 250 } 251 } 252 } 253 buf->unlock(); 254 } 255 buffer->unlock(); 256 } 257 } 258 } else 259#endif 260 { 261slowpath: 262 for (size_t i=0 ; i<NUM_BUFFERS ; i++) { 263 mTextures[i].image = EGL_NO_IMAGE_KHR; 264 } 265 GGLSurface t; 266 status_t res = buffer->lock(&t, GRALLOC_USAGE_SW_READ_OFTEN); 267 LOGE_IF(res, "error %d (%s) locking buffer %p", 268 res, strerror(res), buffer.get()); 269 if (res == NO_ERROR) { 270 loadTexture(&mTextures[0], dirty, t); 271 buffer->unlock(); 272 } 273 } 274} 275 276void Layer::onDraw(const Region& clip) const 277{ 278 int index = mFrontBufferIndex; 279 if (mTextures[index].image == EGL_NO_IMAGE_KHR) 280 index = 0; 281 GLuint textureName = mTextures[index].name; 282 if (UNLIKELY(textureName == -1LU)) { 283 // the texture has not been created yet, this Layer has 284 // in fact never been drawn into. this happens frequently with 285 // SurfaceView. 286 clearWithOpenGL(clip); 287 return; 288 } 289 drawWithOpenGL(clip, mTextures[index]); 290} 291 292sp<GraphicBuffer> Layer::requestBuffer(int index, int usage) 293{ 294 sp<GraphicBuffer> buffer; 295 296 // this ensures our client doesn't go away while we're accessing 297 // the shared area. 298 sp<Client> ourClient(client.promote()); 299 if (ourClient == 0) { 300 // oops, the client is already gone 301 return buffer; 302 } 303 304 /* 305 * This is called from the client's Surface::dequeue(). This can happen 306 * at any time, especially while we're in the middle of using the 307 * buffer 'index' as our front buffer. 308 * 309 * Make sure the buffer we're resizing is not the front buffer and has been 310 * dequeued. Once this condition is asserted, we are guaranteed that this 311 * buffer cannot become the front buffer under our feet, since we're called 312 * from Surface::dequeue() 313 */ 314 status_t err = lcblk->assertReallocate(index); 315 LOGE_IF(err, "assertReallocate(%d) failed (%s)", index, strerror(-err)); 316 if (err != NO_ERROR) { 317 // the surface may have died 318 return buffer; 319 } 320 321 uint32_t w, h; 322 { // scope for the lock 323 Mutex::Autolock _l(mLock); 324 w = mWidth; 325 h = mHeight; 326 buffer = mBuffers[index]; 327 328 // destroy() could have been called before we get here, we log it 329 // because it's uncommon, and the code below should handle it 330 LOGW_IF(buffer==0, 331 "mBuffers[%d] is null (mWidth=%d, mHeight=%d)", 332 index, w, h); 333 334 mBuffers[index].clear(); 335 } 336 337 const uint32_t effectiveUsage = getEffectiveUsage(usage); 338 if (buffer!=0 && buffer->getStrongCount() == 1) { 339 err = buffer->reallocate(w, h, mFormat, effectiveUsage); 340 } else { 341 // here we have to reallocate a new buffer because we could have a 342 // client in our process with a reference to it (eg: status bar), 343 // and we can't release the handle under its feet. 344 buffer.clear(); 345 buffer = new GraphicBuffer(w, h, mFormat, effectiveUsage); 346 err = buffer->initCheck(); 347 } 348 349 if (err || buffer->handle == 0) { 350 LOGE_IF(err || buffer->handle == 0, 351 "Layer::requestBuffer(this=%p), index=%d, w=%d, h=%d failed (%s)", 352 this, index, w, h, strerror(-err)); 353 } else { 354 LOGD_IF(DEBUG_RESIZE, 355 "Layer::requestBuffer(this=%p), index=%d, w=%d, h=%d, handle=%p", 356 this, index, w, h, buffer->handle); 357 } 358 359 if (err == NO_ERROR && buffer->handle != 0) { 360 Mutex::Autolock _l(mLock); 361 if (mWidth && mHeight) { 362 // and we have new buffer 363 mBuffers[index] = buffer; 364 // texture is now dirty... 365 mTextures[index].dirty = true; 366 } else { 367 // oops we got killed while we were allocating the buffer 368 buffer.clear(); 369 } 370 } 371 return buffer; 372} 373 374uint32_t Layer::getEffectiveUsage(uint32_t usage) const 375{ 376 /* 377 * buffers used for software rendering, but h/w composition 378 * are allocated with SW_READ_OFTEN | SW_WRITE_OFTEN | HW_TEXTURE 379 * 380 * buffers used for h/w rendering and h/w composition 381 * are allocated with HW_RENDER | HW_TEXTURE 382 * 383 * buffers used with h/w rendering and either NPOT or no egl_image_ext 384 * are allocated with SW_READ_RARELY | HW_RENDER 385 * 386 */ 387 388 if (mSecure) { 389 // secure buffer, don't store it into the GPU 390 usage = GraphicBuffer::USAGE_SW_READ_OFTEN | 391 GraphicBuffer::USAGE_SW_WRITE_OFTEN; 392 } else { 393 // it's allowed to modify the usage flags here, but generally 394 // the requested flags should be honored. 395 if (mNoEGLImageForSwBuffers) { 396 if (usage & GraphicBuffer::USAGE_HW_MASK) { 397 // request EGLImage for h/w buffers only 398 usage |= GraphicBuffer::USAGE_HW_TEXTURE; 399 } 400 } else { 401 // request EGLImage for all buffers 402 usage |= GraphicBuffer::USAGE_HW_TEXTURE; 403 } 404 } 405 return usage; 406} 407 408uint32_t Layer::doTransaction(uint32_t flags) 409{ 410 const Layer::State& front(drawingState()); 411 const Layer::State& temp(currentState()); 412 413 if ((front.requested_w != temp.requested_w) || 414 (front.requested_h != temp.requested_h)) { 415 // the size changed, we need to ask our client to request a new buffer 416 LOGD_IF(DEBUG_RESIZE, 417 "resize (layer=%p), requested (%dx%d), " 418 "drawing (%d,%d), (%dx%d), (%dx%d)", 419 this, 420 int(temp.requested_w), int(temp.requested_h), 421 int(front.requested_w), int(front.requested_h), 422 int(mBuffers[0]->getWidth()), int(mBuffers[0]->getHeight()), 423 int(mBuffers[1]->getWidth()), int(mBuffers[1]->getHeight())); 424 425 // we're being resized and there is a freeze display request, 426 // acquire a freeze lock, so that the screen stays put 427 // until we've redrawn at the new size; this is to avoid 428 // glitches upon orientation changes. 429 if (mFlinger->hasFreezeRequest()) { 430 // if the surface is hidden, don't try to acquire the 431 // freeze lock, since hidden surfaces may never redraw 432 if (!(front.flags & ISurfaceComposer::eLayerHidden)) { 433 mFreezeLock = mFlinger->getFreezeLock(); 434 } 435 } 436 437 // this will make sure LayerBase::doTransaction doesn't update 438 // the drawing state's size 439 Layer::State& editDraw(mDrawingState); 440 editDraw.requested_w = temp.requested_w; 441 editDraw.requested_h = temp.requested_h; 442 443 // record the new size, form this point on, when the client request a 444 // buffer, it'll get the new size. 445 setDrawingSize(temp.requested_w, temp.requested_h); 446 447 // all buffers need reallocation 448 lcblk->reallocate(); 449 } 450 451 if (temp.sequence != front.sequence) { 452 if (temp.flags & ISurfaceComposer::eLayerHidden || temp.alpha == 0) { 453 // this surface is now hidden, so it shouldn't hold a freeze lock 454 // (it may never redraw, which is fine if it is hidden) 455 mFreezeLock.clear(); 456 } 457 } 458 459 return LayerBase::doTransaction(flags); 460} 461 462void Layer::setDrawingSize(uint32_t w, uint32_t h) { 463 Mutex::Autolock _l(mLock); 464 mWidth = w; 465 mHeight = h; 466} 467 468// ---------------------------------------------------------------------------- 469// pageflip handling... 470// ---------------------------------------------------------------------------- 471 472void Layer::lockPageFlip(bool& recomputeVisibleRegions) 473{ 474 ssize_t buf = lcblk->retireAndLock(); 475 if (buf < NO_ERROR) { 476 //LOGW("nothing to retire (%s)", strerror(-buf)); 477 // NOTE: here the buffer is locked because we will used 478 // for composition later in the loop 479 return; 480 } 481 482 // ouch, this really should never happen 483 if (uint32_t(buf)>=NUM_BUFFERS) { 484 LOGE("retireAndLock() buffer index (%d) out of range", buf); 485 mPostedDirtyRegion.clear(); 486 return; 487 } 488 489 // we retired a buffer, which becomes the new front buffer 490 mFrontBufferIndex = buf; 491 492 // get the dirty region 493 sp<GraphicBuffer> newFrontBuffer(getBuffer(buf)); 494 if (newFrontBuffer != NULL) { 495 // compute the posted region 496 const Region dirty(lcblk->getDirtyRegion(buf)); 497 mPostedDirtyRegion = dirty.intersect( newFrontBuffer->getBounds() ); 498 499 // update the layer size and release freeze-lock 500 const Layer::State& front(drawingState()); 501 if (newFrontBuffer->getWidth() == front.requested_w && 502 newFrontBuffer->getHeight() == front.requested_h) 503 { 504 if ((front.w != front.requested_w) || 505 (front.h != front.requested_h)) 506 { 507 // Here we pretend the transaction happened by updating the 508 // current and drawing states. Drawing state is only accessed 509 // in this thread, no need to have it locked 510 Layer::State& editDraw(mDrawingState); 511 editDraw.w = editDraw.requested_w; 512 editDraw.h = editDraw.requested_h; 513 514 // We also need to update the current state so that we don't 515 // end-up doing too much work during the next transaction. 516 // NOTE: We actually don't need hold the transaction lock here 517 // because State::w and State::h are only accessed from 518 // this thread 519 Layer::State& editTemp(currentState()); 520 editTemp.w = editDraw.w; 521 editTemp.h = editDraw.h; 522 523 // recompute visible region 524 recomputeVisibleRegions = true; 525 } 526 527 // we now have the correct size, unfreeze the screen 528 mFreezeLock.clear(); 529 } 530 } else { 531 // this should not happen unless we ran out of memory while 532 // allocating the buffer. we're hoping that things will get back 533 // to normal the next time the app tries to draw into this buffer. 534 // meanwhile, pretend the screen didn't update. 535 mPostedDirtyRegion.clear(); 536 } 537 538 if (lcblk->getQueuedCount()) { 539 // signal an event if we have more buffers waiting 540 mFlinger->signalEvent(); 541 } 542 543 if (!mPostedDirtyRegion.isEmpty()) { 544 reloadTexture( mPostedDirtyRegion ); 545 } 546} 547 548void Layer::unlockPageFlip( 549 const Transform& planeTransform, Region& outDirtyRegion) 550{ 551 Region dirtyRegion(mPostedDirtyRegion); 552 if (!dirtyRegion.isEmpty()) { 553 mPostedDirtyRegion.clear(); 554 // The dirty region is given in the layer's coordinate space 555 // transform the dirty region by the surface's transformation 556 // and the global transformation. 557 const Layer::State& s(drawingState()); 558 const Transform tr(planeTransform * s.transform); 559 dirtyRegion = tr.transform(dirtyRegion); 560 561 // At this point, the dirty region is in screen space. 562 // Make sure it's constrained by the visible region (which 563 // is in screen space as well). 564 dirtyRegion.andSelf(visibleRegionScreen); 565 outDirtyRegion.orSelf(dirtyRegion); 566 } 567 if (visibleRegionScreen.isEmpty()) { 568 // an invisible layer should not hold a freeze-lock 569 // (because it may never be updated and thereore never release it) 570 mFreezeLock.clear(); 571 } 572} 573 574void Layer::finishPageFlip() 575{ 576 status_t err = lcblk->unlock( mFrontBufferIndex ); 577 LOGE_IF(err!=NO_ERROR, 578 "layer %p, buffer=%d wasn't locked!", 579 this, mFrontBufferIndex); 580} 581 582// --------------------------------------------------------------------------- 583 584Layer::SurfaceLayer::SurfaceLayer(const sp<SurfaceFlinger>& flinger, 585 SurfaceID id, const sp<Layer>& owner) 586 : Surface(flinger, id, owner->getIdentity(), owner) 587{ 588} 589 590Layer::SurfaceLayer::~SurfaceLayer() 591{ 592} 593 594sp<GraphicBuffer> Layer::SurfaceLayer::requestBuffer(int index, int usage) 595{ 596 sp<GraphicBuffer> buffer; 597 sp<Layer> owner(getOwner()); 598 if (owner != 0) { 599 LOGE_IF(uint32_t(index)>=NUM_BUFFERS, 600 "getBuffer() index (%d) out of range", index); 601 if (uint32_t(index) < NUM_BUFFERS) { 602 buffer = owner->requestBuffer(index, usage); 603 } 604 } 605 return buffer; 606} 607 608// --------------------------------------------------------------------------- 609 610 611}; // namespace android 612