Layer.cpp revision 90ac799241f077a7b7e6c1875fd933864c8dd2a7
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#include <math.h> 21 22#include <cutils/compiler.h> 23#include <cutils/native_handle.h> 24#include <cutils/properties.h> 25 26#include <utils/Errors.h> 27#include <utils/Log.h> 28#include <utils/StopWatch.h> 29 30#include <ui/GraphicBuffer.h> 31#include <ui/PixelFormat.h> 32 33#include <gui/Surface.h> 34 35#include "clz.h" 36#include "DisplayHardware/DisplayHardware.h" 37#include "DisplayHardware/HWComposer.h" 38#include "GLExtensions.h" 39#include "Layer.h" 40#include "SurfaceFlinger.h" 41#include "SurfaceTextureLayer.h" 42 43#define DEBUG_RESIZE 0 44 45namespace android { 46 47// --------------------------------------------------------------------------- 48 49Layer::Layer(SurfaceFlinger* flinger, 50 DisplayID display, const sp<Client>& client) 51 : LayerBaseClient(flinger, display, client), 52 mTextureName(-1U), 53 mQueuedFrames(0), 54 mCurrentTransform(0), 55 mCurrentScalingMode(NATIVE_WINDOW_SCALING_MODE_FREEZE), 56 mCurrentOpacity(true), 57 mRefreshPending(false), 58 mFrameLatencyNeeded(false), 59 mFrameLatencyOffset(0), 60 mFormat(PIXEL_FORMAT_NONE), 61 mGLExtensions(GLExtensions::getInstance()), 62 mOpaqueLayer(true), 63 mNeedsDithering(false), 64 mSecure(false), 65 mProtectedByApp(false) 66{ 67 mCurrentCrop.makeInvalid(); 68 glGenTextures(1, &mTextureName); 69} 70 71void Layer::onLayerDisplayed() { 72 if (mFrameLatencyNeeded) { 73 const DisplayHardware& hw(graphicPlane(0).displayHardware()); 74 mFrameStats[mFrameLatencyOffset].timestamp = mSurfaceTexture->getTimestamp(); 75 mFrameStats[mFrameLatencyOffset].set = systemTime(); 76 mFrameStats[mFrameLatencyOffset].vsync = hw.getRefreshTimestamp(); 77 mFrameLatencyOffset = (mFrameLatencyOffset + 1) % 128; 78 mFrameLatencyNeeded = false; 79 } 80} 81 82void Layer::onFirstRef() 83{ 84 LayerBaseClient::onFirstRef(); 85 86 struct FrameQueuedListener : public SurfaceTexture::FrameAvailableListener { 87 FrameQueuedListener(Layer* layer) : mLayer(layer) { } 88 private: 89 wp<Layer> mLayer; 90 virtual void onFrameAvailable() { 91 sp<Layer> that(mLayer.promote()); 92 if (that != 0) { 93 that->onFrameQueued(); 94 } 95 } 96 }; 97 mSurfaceTexture = new SurfaceTextureLayer(mTextureName, this); 98 mSurfaceTexture->setFrameAvailableListener(new FrameQueuedListener(this)); 99 mSurfaceTexture->setSynchronousMode(true); 100#ifdef USE_TRIPLE_BUFFERING 101#warning "using triple buffering" 102 mSurfaceTexture->setBufferCountServer(3); 103#else 104 mSurfaceTexture->setBufferCountServer(2); 105#endif 106} 107 108Layer::~Layer() 109{ 110 mFlinger->postMessageAsync( 111 new SurfaceFlinger::MessageDestroyGLTexture(mTextureName) ); 112} 113 114void Layer::onFrameQueued() { 115 android_atomic_inc(&mQueuedFrames); 116 mFlinger->signalLayerUpdate(); 117} 118 119// called with SurfaceFlinger::mStateLock as soon as the layer is entered 120// in the purgatory list 121void Layer::onRemoved() 122{ 123 mSurfaceTexture->abandon(); 124} 125 126void Layer::setName(const String8& name) { 127 LayerBase::setName(name); 128 mSurfaceTexture->setName(name); 129} 130 131sp<ISurface> Layer::createSurface() 132{ 133 class BSurface : public BnSurface, public LayerCleaner { 134 wp<const Layer> mOwner; 135 virtual sp<ISurfaceTexture> getSurfaceTexture() const { 136 sp<ISurfaceTexture> res; 137 sp<const Layer> that( mOwner.promote() ); 138 if (that != NULL) { 139 res = that->mSurfaceTexture; 140 } 141 return res; 142 } 143 public: 144 BSurface(const sp<SurfaceFlinger>& flinger, 145 const sp<Layer>& layer) 146 : LayerCleaner(flinger, layer), mOwner(layer) { } 147 }; 148 sp<ISurface> sur(new BSurface(mFlinger, this)); 149 return sur; 150} 151 152wp<IBinder> Layer::getSurfaceTextureBinder() const 153{ 154 return mSurfaceTexture->asBinder(); 155} 156 157status_t Layer::setBuffers( uint32_t w, uint32_t h, 158 PixelFormat format, uint32_t flags) 159{ 160 // this surfaces pixel format 161 PixelFormatInfo info; 162 status_t err = getPixelFormatInfo(format, &info); 163 if (err) { 164 ALOGE("unsupported pixelformat %d", format); 165 return err; 166 } 167 168 // the display's pixel format 169 const DisplayHardware& hw(graphicPlane(0).displayHardware()); 170 uint32_t const maxSurfaceDims = min( 171 hw.getMaxTextureSize(), hw.getMaxViewportDims()); 172 173 // never allow a surface larger than what our underlying GL implementation 174 // can handle. 175 if ((uint32_t(w)>maxSurfaceDims) || (uint32_t(h)>maxSurfaceDims)) { 176 ALOGE("dimensions too large %u x %u", uint32_t(w), uint32_t(h)); 177 return BAD_VALUE; 178 } 179 180 PixelFormatInfo displayInfo; 181 getPixelFormatInfo(hw.getFormat(), &displayInfo); 182 const uint32_t hwFlags = hw.getFlags(); 183 184 mFormat = format; 185 186 mSecure = (flags & ISurfaceComposer::eSecure) ? true : false; 187 mProtectedByApp = (flags & ISurfaceComposer::eProtectedByApp) ? true : false; 188 mOpaqueLayer = (flags & ISurfaceComposer::eOpaque); 189 mCurrentOpacity = getOpacityForFormat(format); 190 191 mSurfaceTexture->setDefaultBufferSize(w, h); 192 mSurfaceTexture->setDefaultBufferFormat(format); 193 194 // we use the red index 195 int displayRedSize = displayInfo.getSize(PixelFormatInfo::INDEX_RED); 196 int layerRedsize = info.getSize(PixelFormatInfo::INDEX_RED); 197 mNeedsDithering = layerRedsize > displayRedSize; 198 199 return NO_ERROR; 200} 201 202void Layer::setGeometry(hwc_layer_t* hwcl) 203{ 204 LayerBaseClient::setGeometry(hwcl); 205 206 hwcl->flags &= ~HWC_SKIP_LAYER; 207 208 // we can't do alpha-fade with the hwc HAL 209 const State& s(drawingState()); 210 if (s.alpha < 0xFF) { 211 hwcl->flags = HWC_SKIP_LAYER; 212 } 213 214 /* 215 * Transformations are applied in this order: 216 * 1) buffer orientation/flip/mirror 217 * 2) state transformation (window manager) 218 * 3) layer orientation (screen orientation) 219 * mTransform is already the composition of (2) and (3) 220 * (NOTE: the matrices are multiplied in reverse order) 221 */ 222 223 const Transform bufferOrientation(mCurrentTransform); 224 const Transform tr(mTransform * bufferOrientation); 225 226 // this gives us only the "orientation" component of the transform 227 const uint32_t finalTransform = tr.getOrientation(); 228 229 // we can only handle simple transformation 230 if (finalTransform & Transform::ROT_INVALID) { 231 hwcl->flags = HWC_SKIP_LAYER; 232 } else { 233 hwcl->transform = finalTransform; 234 } 235 236 if (isCropped()) { 237 hwcl->sourceCrop.left = mCurrentCrop.left; 238 hwcl->sourceCrop.top = mCurrentCrop.top; 239 hwcl->sourceCrop.right = mCurrentCrop.right; 240 hwcl->sourceCrop.bottom = mCurrentCrop.bottom; 241 } else { 242 const sp<GraphicBuffer>& buffer(mActiveBuffer); 243 hwcl->sourceCrop.left = 0; 244 hwcl->sourceCrop.top = 0; 245 if (buffer != NULL) { 246 hwcl->sourceCrop.right = buffer->width; 247 hwcl->sourceCrop.bottom = buffer->height; 248 } else { 249 hwcl->sourceCrop.right = mTransformedBounds.width(); 250 hwcl->sourceCrop.bottom = mTransformedBounds.height(); 251 } 252 } 253} 254 255void Layer::setPerFrameData(hwc_layer_t* hwcl) { 256 const sp<GraphicBuffer>& buffer(mActiveBuffer); 257 if (buffer == NULL) { 258 // this can happen if the client never drew into this layer yet, 259 // or if we ran out of memory. In that case, don't let 260 // HWC handle it. 261 hwcl->flags |= HWC_SKIP_LAYER; 262 hwcl->handle = NULL; 263 } else { 264 hwcl->handle = buffer->handle; 265 } 266} 267 268void Layer::onDraw(const Region& clip) const 269{ 270 if (CC_UNLIKELY(mActiveBuffer == 0)) { 271 // the texture has not been created yet, this Layer has 272 // in fact never been drawn into. This happens frequently with 273 // SurfaceView because the WindowManager can't know when the client 274 // has drawn the first time. 275 276 // If there is nothing under us, we paint the screen in black, otherwise 277 // we just skip this update. 278 279 // figure out if there is something below us 280 Region under; 281 const SurfaceFlinger::LayerVector& drawingLayers( 282 mFlinger->mDrawingState.layersSortedByZ); 283 const size_t count = drawingLayers.size(); 284 for (size_t i=0 ; i<count ; ++i) { 285 const sp<LayerBase>& layer(drawingLayers[i]); 286 if (layer.get() == static_cast<LayerBase const*>(this)) 287 break; 288 under.orSelf(layer->visibleRegionScreen); 289 } 290 // if not everything below us is covered, we plug the holes! 291 Region holes(clip.subtract(under)); 292 if (!holes.isEmpty()) { 293 clearWithOpenGL(holes, 0, 0, 0, 1); 294 } 295 return; 296 } 297 298 if (!isProtected()) { 299 glBindTexture(GL_TEXTURE_EXTERNAL_OES, mTextureName); 300 GLenum filter = GL_NEAREST; 301 if (getFiltering() || needsFiltering() || isFixedSize() || isCropped()) { 302 // TODO: we could be more subtle with isFixedSize() 303 filter = GL_LINEAR; 304 } 305 glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MAG_FILTER, filter); 306 glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MIN_FILTER, filter); 307 glMatrixMode(GL_TEXTURE); 308 glLoadMatrixf(mTextureMatrix); 309 glMatrixMode(GL_MODELVIEW); 310 glDisable(GL_TEXTURE_2D); 311 glEnable(GL_TEXTURE_EXTERNAL_OES); 312 } else { 313 glBindTexture(GL_TEXTURE_2D, mFlinger->getProtectedTexName()); 314 glMatrixMode(GL_TEXTURE); 315 glLoadIdentity(); 316 glMatrixMode(GL_MODELVIEW); 317 glDisable(GL_TEXTURE_EXTERNAL_OES); 318 glEnable(GL_TEXTURE_2D); 319 } 320 321 drawWithOpenGL(clip); 322 323 glDisable(GL_TEXTURE_EXTERNAL_OES); 324 glDisable(GL_TEXTURE_2D); 325} 326 327// As documented in libhardware header, formats in the range 328// 0x100 - 0x1FF are specific to the HAL implementation, and 329// are known to have no alpha channel 330// TODO: move definition for device-specific range into 331// hardware.h, instead of using hard-coded values here. 332#define HARDWARE_IS_DEVICE_FORMAT(f) ((f) >= 0x100 && (f) <= 0x1FF) 333 334bool Layer::getOpacityForFormat(uint32_t format) 335{ 336 if (HARDWARE_IS_DEVICE_FORMAT(format)) { 337 return true; 338 } 339 PixelFormatInfo info; 340 status_t err = getPixelFormatInfo(PixelFormat(format), &info); 341 // in case of error (unknown format), we assume no blending 342 return (err || info.h_alpha <= info.l_alpha); 343} 344 345 346bool Layer::isOpaque() const 347{ 348 // if we don't have a buffer yet, we're translucent regardless of the 349 // layer's opaque flag. 350 if (mActiveBuffer == 0) { 351 return false; 352 } 353 354 // if the layer has the opaque flag, then we're always opaque, 355 // otherwise we use the current buffer's format. 356 return mOpaqueLayer || mCurrentOpacity; 357} 358 359bool Layer::isProtected() const 360{ 361 const sp<GraphicBuffer>& activeBuffer(mActiveBuffer); 362 return (activeBuffer != 0) && 363 (activeBuffer->getUsage() & GRALLOC_USAGE_PROTECTED); 364} 365 366uint32_t Layer::doTransaction(uint32_t flags) 367{ 368 const Layer::State& front(drawingState()); 369 const Layer::State& temp(currentState()); 370 371 const bool sizeChanged = (front.requested_w != temp.requested_w) || 372 (front.requested_h != temp.requested_h); 373 374 if (sizeChanged) { 375 // the size changed, we need to ask our client to request a new buffer 376 ALOGD_IF(DEBUG_RESIZE, 377 "doTransaction: " 378 "resize (layer=%p), requested (%dx%d), drawing (%d,%d), " 379 "scalingMode=%d", 380 this, 381 int(temp.requested_w), int(temp.requested_h), 382 int(front.requested_w), int(front.requested_h), 383 mCurrentScalingMode); 384 385 if (!isFixedSize()) { 386 // this will make sure LayerBase::doTransaction doesn't update 387 // the drawing state's size 388 Layer::State& editDraw(mDrawingState); 389 editDraw.requested_w = temp.requested_w; 390 editDraw.requested_h = temp.requested_h; 391 } 392 393 // record the new size, form this point on, when the client request 394 // a buffer, it'll get the new size. 395 mSurfaceTexture->setDefaultBufferSize(temp.requested_w, 396 temp.requested_h); 397 } 398 399 return LayerBase::doTransaction(flags); 400} 401 402bool Layer::isFixedSize() const { 403 return mCurrentScalingMode != NATIVE_WINDOW_SCALING_MODE_FREEZE; 404} 405 406bool Layer::isCropped() const { 407 return !mCurrentCrop.isEmpty(); 408} 409 410// ---------------------------------------------------------------------------- 411// pageflip handling... 412// ---------------------------------------------------------------------------- 413 414bool Layer::onPreComposition() { 415 mRefreshPending = false; 416 return mQueuedFrames > 0; 417} 418 419void Layer::lockPageFlip(bool& recomputeVisibleRegions) 420{ 421 if (mQueuedFrames > 0) { 422 423 // if we've already called updateTexImage() without going through 424 // a composition step, we have to skip this layer at this point 425 // because we cannot call updateTeximage() without a corresponding 426 // compositionComplete() call. 427 // we'll trigger an update in onPreComposition(). 428 if (mRefreshPending) { 429 mPostedDirtyRegion.clear(); 430 return; 431 } 432 mRefreshPending = true; 433 434 // Capture the old state of the layer for comparisons later 435 const bool oldOpacity = isOpaque(); 436 sp<GraphicBuffer> oldActiveBuffer = mActiveBuffer; 437 438 // signal another event if we have more frames pending 439 if (android_atomic_dec(&mQueuedFrames) > 1) { 440 mFlinger->signalLayerUpdate(); 441 } 442 443 if (mSurfaceTexture->updateTexImage() < NO_ERROR) { 444 // something happened! 445 recomputeVisibleRegions = true; 446 return; 447 } 448 449 // update the active buffer 450 mActiveBuffer = mSurfaceTexture->getCurrentBuffer(); 451 mFrameLatencyNeeded = true; 452 453 const Rect crop(mSurfaceTexture->getCurrentCrop()); 454 const uint32_t transform(mSurfaceTexture->getCurrentTransform()); 455 const uint32_t scalingMode(mSurfaceTexture->getCurrentScalingMode()); 456 if ((crop != mCurrentCrop) || 457 (transform != mCurrentTransform) || 458 (scalingMode != mCurrentScalingMode)) 459 { 460 mCurrentCrop = crop; 461 mCurrentTransform = transform; 462 mCurrentScalingMode = scalingMode; 463 mFlinger->invalidateHwcGeometry(); 464 } 465 466 GLfloat textureMatrix[16]; 467 mSurfaceTexture->getTransformMatrix(textureMatrix); 468 if (memcmp(textureMatrix, mTextureMatrix, sizeof(textureMatrix))) { 469 memcpy(mTextureMatrix, textureMatrix, sizeof(textureMatrix)); 470 mFlinger->invalidateHwcGeometry(); 471 } 472 473 uint32_t bufWidth = mActiveBuffer->getWidth(); 474 uint32_t bufHeight = mActiveBuffer->getHeight(); 475 if (oldActiveBuffer != NULL) { 476 if (bufWidth != uint32_t(oldActiveBuffer->width) || 477 bufHeight != uint32_t(oldActiveBuffer->height)) { 478 mFlinger->invalidateHwcGeometry(); 479 } 480 } 481 482 mCurrentOpacity = getOpacityForFormat(mActiveBuffer->format); 483 if (oldOpacity != isOpaque()) { 484 recomputeVisibleRegions = true; 485 } 486 487 glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 488 glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 489 490 // update the layer size if needed 491 const Layer::State& front(drawingState()); 492 493 // FIXME: mPostedDirtyRegion = dirty & bounds 494 mPostedDirtyRegion.set(front.w, front.h); 495 496 if ((front.w != front.requested_w) || 497 (front.h != front.requested_h)) 498 { 499 // check that we received a buffer of the right size 500 // (Take the buffer's orientation into account) 501 if (mCurrentTransform & Transform::ROT_90) { 502 swap(bufWidth, bufHeight); 503 } 504 505 if (isFixedSize() || 506 (bufWidth == front.requested_w && 507 bufHeight == front.requested_h)) 508 { 509 // Here we pretend the transaction happened by updating the 510 // current and drawing states. Drawing state is only accessed 511 // in this thread, no need to have it locked 512 Layer::State& editDraw(mDrawingState); 513 editDraw.w = editDraw.requested_w; 514 editDraw.h = editDraw.requested_h; 515 516 // We also need to update the current state so that we don't 517 // end-up doing too much work during the next transaction. 518 // NOTE: We actually don't need hold the transaction lock here 519 // because State::w and State::h are only accessed from 520 // this thread 521 Layer::State& editTemp(currentState()); 522 editTemp.w = editDraw.w; 523 editTemp.h = editDraw.h; 524 525 // recompute visible region 526 recomputeVisibleRegions = true; 527 } 528 529 ALOGD_IF(DEBUG_RESIZE, 530 "lockPageFlip : " 531 " (layer=%p), buffer (%ux%u, tr=%02x), " 532 "requested (%dx%d)", 533 this, 534 bufWidth, bufHeight, mCurrentTransform, 535 front.requested_w, front.requested_h); 536 } 537 } 538} 539 540void Layer::unlockPageFlip( 541 const Transform& planeTransform, Region& outDirtyRegion) 542{ 543 Region postedRegion(mPostedDirtyRegion); 544 if (!postedRegion.isEmpty()) { 545 mPostedDirtyRegion.clear(); 546 if (!visibleRegionScreen.isEmpty()) { 547 // The dirty region is given in the layer's coordinate space 548 // transform the dirty region by the surface's transformation 549 // and the global transformation. 550 const Layer::State& s(drawingState()); 551 const Transform tr(planeTransform * s.transform); 552 postedRegion = tr.transform(postedRegion); 553 554 // At this point, the dirty region is in screen space. 555 // Make sure it's constrained by the visible region (which 556 // is in screen space as well). 557 postedRegion.andSelf(visibleRegionScreen); 558 outDirtyRegion.orSelf(postedRegion); 559 } 560 } 561} 562 563void Layer::dump(String8& result, char* buffer, size_t SIZE) const 564{ 565 LayerBaseClient::dump(result, buffer, SIZE); 566 567 sp<const GraphicBuffer> buf0(mActiveBuffer); 568 uint32_t w0=0, h0=0, s0=0, f0=0; 569 if (buf0 != 0) { 570 w0 = buf0->getWidth(); 571 h0 = buf0->getHeight(); 572 s0 = buf0->getStride(); 573 f0 = buf0->format; 574 } 575 snprintf(buffer, SIZE, 576 " " 577 "format=%2d, activeBuffer=[%4ux%4u:%4u,%3X]," 578 " transform-hint=0x%02x, queued-frames=%d, mRefreshPending=%d\n", 579 mFormat, w0, h0, s0,f0, 580 getTransformHint(), mQueuedFrames, mRefreshPending); 581 582 result.append(buffer); 583 584 if (mSurfaceTexture != 0) { 585 mSurfaceTexture->dump(result, " ", buffer, SIZE); 586 } 587} 588 589void Layer::dumpStats(String8& result, char* buffer, size_t SIZE) const 590{ 591 LayerBaseClient::dumpStats(result, buffer, SIZE); 592 const size_t o = mFrameLatencyOffset; 593 const DisplayHardware& hw(graphicPlane(0).displayHardware()); 594 const nsecs_t period = hw.getRefreshPeriod(); 595 result.appendFormat("%lld\n", period); 596 for (size_t i=0 ; i<128 ; i++) { 597 const size_t index = (o+i) % 128; 598 const nsecs_t time_app = mFrameStats[index].timestamp; 599 const nsecs_t time_set = mFrameStats[index].set; 600 const nsecs_t time_vsync = mFrameStats[index].vsync; 601 result.appendFormat("%lld\t%lld\t%lld\n", 602 time_app, 603 time_vsync, 604 time_set); 605 } 606 result.append("\n"); 607} 608 609void Layer::clearStats() 610{ 611 LayerBaseClient::clearStats(); 612 memset(mFrameStats, 0, sizeof(mFrameStats)); 613} 614 615uint32_t Layer::getEffectiveUsage(uint32_t usage) const 616{ 617 // TODO: should we do something special if mSecure is set? 618 if (mProtectedByApp) { 619 // need a hardware-protected path to external video sink 620 usage |= GraphicBuffer::USAGE_PROTECTED; 621 } 622 usage |= GraphicBuffer::USAGE_HW_COMPOSER; 623 return usage; 624} 625 626uint32_t Layer::getTransformHint() const { 627 uint32_t orientation = 0; 628 if (!mFlinger->mDebugDisableTransformHint) { 629 orientation = getPlaneOrientation(); 630 if (orientation & Transform::ROT_INVALID) { 631 orientation = 0; 632 } 633 } 634 return orientation; 635} 636 637// --------------------------------------------------------------------------- 638 639 640}; // namespace android 641