Layer.cpp revision dd533712f8dd21c0dadfd5ce8a0ad85aa3e96ada
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#define ATRACE_TAG ATRACE_TAG_GRAPHICS 18 19#include <stdlib.h> 20#include <stdint.h> 21#include <sys/types.h> 22#include <math.h> 23 24#include <cutils/compiler.h> 25#include <cutils/native_handle.h> 26#include <cutils/properties.h> 27 28#include <utils/Errors.h> 29#include <utils/Log.h> 30#include <utils/StopWatch.h> 31#include <utils/Trace.h> 32 33#include <ui/GraphicBuffer.h> 34#include <ui/PixelFormat.h> 35 36#include <gui/Surface.h> 37 38#include "clz.h" 39#include "Colorizer.h" 40#include "DisplayDevice.h" 41#include "Layer.h" 42#include "SurfaceFlinger.h" 43#include "SurfaceTextureLayer.h" 44 45#include "DisplayHardware/HWComposer.h" 46 47#include "RenderEngine/RenderEngine.h" 48 49#define DEBUG_RESIZE 0 50 51namespace android { 52 53// --------------------------------------------------------------------------- 54 55int32_t Layer::sSequence = 1; 56 57Layer::Layer(SurfaceFlinger* flinger, const sp<Client>& client, 58 const String8& name, uint32_t w, uint32_t h, uint32_t flags) 59 : contentDirty(false), 60 sequence(uint32_t(android_atomic_inc(&sSequence))), 61 mFlinger(flinger), 62 mTextureName(-1U), 63 mPremultipliedAlpha(true), 64 mName("unnamed"), 65 mDebug(false), 66 mFormat(PIXEL_FORMAT_NONE), 67 mOpaqueLayer(true), 68 mTransactionFlags(0), 69 mQueuedFrames(0), 70 mCurrentTransform(0), 71 mCurrentScalingMode(NATIVE_WINDOW_SCALING_MODE_FREEZE), 72 mCurrentOpacity(true), 73 mRefreshPending(false), 74 mFrameLatencyNeeded(false), 75 mFiltering(false), 76 mNeedsFiltering(false), 77 mSecure(false), 78 mProtectedByApp(false), 79 mHasSurface(false), 80 mClientRef(client) 81{ 82 mCurrentCrop.makeInvalid(); 83 glGenTextures(1, &mTextureName); 84 85 uint32_t layerFlags = 0; 86 if (flags & ISurfaceComposerClient::eHidden) 87 layerFlags = layer_state_t::eLayerHidden; 88 89 if (flags & ISurfaceComposerClient::eNonPremultiplied) 90 mPremultipliedAlpha = false; 91 92 mName = name; 93 94 mCurrentState.active.w = w; 95 mCurrentState.active.h = h; 96 mCurrentState.active.crop.makeInvalid(); 97 mCurrentState.z = 0; 98 mCurrentState.alpha = 0xFF; 99 mCurrentState.layerStack = 0; 100 mCurrentState.flags = layerFlags; 101 mCurrentState.sequence = 0; 102 mCurrentState.transform.set(0, 0); 103 mCurrentState.requested = mCurrentState.active; 104 105 // drawing state & current state are identical 106 mDrawingState = mCurrentState; 107 108 nsecs_t displayPeriod = 109 flinger->getHwComposer().getRefreshPeriod(HWC_DISPLAY_PRIMARY); 110 mFrameTracker.setDisplayRefreshPeriod(displayPeriod); 111} 112 113void Layer::onFirstRef() 114{ 115 // Creates a custom BufferQueue for SurfaceFlingerConsumer to use 116 sp<BufferQueue> bq = new SurfaceTextureLayer(mFlinger); 117 mSurfaceFlingerConsumer = new SurfaceFlingerConsumer(bq, mTextureName, 118 GL_TEXTURE_EXTERNAL_OES, false); 119 120 mSurfaceFlingerConsumer->setConsumerUsageBits(getEffectiveUsage(0)); 121 mSurfaceFlingerConsumer->setFrameAvailableListener(this); 122 mSurfaceFlingerConsumer->setName(mName); 123 124#ifdef TARGET_DISABLE_TRIPLE_BUFFERING 125#warning "disabling triple buffering" 126 mSurfaceFlingerConsumer->setDefaultMaxBufferCount(2); 127#else 128 mSurfaceFlingerConsumer->setDefaultMaxBufferCount(3); 129#endif 130 131 const sp<const DisplayDevice> hw(mFlinger->getDefaultDisplayDevice()); 132 updateTransformHint(hw); 133} 134 135Layer::~Layer() { 136 sp<Client> c(mClientRef.promote()); 137 if (c != 0) { 138 c->detachLayer(this); 139 } 140 mFlinger->deleteTextureAsync(mTextureName); 141 mFrameTracker.logAndResetStats(mName); 142} 143 144// --------------------------------------------------------------------------- 145// callbacks 146// --------------------------------------------------------------------------- 147 148void Layer::onLayerDisplayed(const sp<const DisplayDevice>& hw, 149 HWComposer::HWCLayerInterface* layer) { 150 if (layer) { 151 layer->onDisplayed(); 152 mSurfaceFlingerConsumer->setReleaseFence(layer->getAndResetReleaseFence()); 153 } 154} 155 156void Layer::onFrameAvailable() { 157 android_atomic_inc(&mQueuedFrames); 158 mFlinger->signalLayerUpdate(); 159} 160 161// called with SurfaceFlinger::mStateLock from the drawing thread after 162// the layer has been remove from the current state list (and just before 163// it's removed from the drawing state list) 164void Layer::onRemoved() { 165 mSurfaceFlingerConsumer->abandon(); 166} 167 168// --------------------------------------------------------------------------- 169// set-up 170// --------------------------------------------------------------------------- 171 172const String8& Layer::getName() const { 173 return mName; 174} 175 176status_t Layer::setBuffers( uint32_t w, uint32_t h, 177 PixelFormat format, uint32_t flags) 178{ 179 uint32_t const maxSurfaceDims = min( 180 mFlinger->getMaxTextureSize(), mFlinger->getMaxViewportDims()); 181 182 // never allow a surface larger than what our underlying GL implementation 183 // can handle. 184 if ((uint32_t(w)>maxSurfaceDims) || (uint32_t(h)>maxSurfaceDims)) { 185 ALOGE("dimensions too large %u x %u", uint32_t(w), uint32_t(h)); 186 return BAD_VALUE; 187 } 188 189 mFormat = format; 190 191 mSecure = (flags & ISurfaceComposerClient::eSecure) ? true : false; 192 mProtectedByApp = (flags & ISurfaceComposerClient::eProtectedByApp) ? true : false; 193 mOpaqueLayer = (flags & ISurfaceComposerClient::eOpaque); 194 mCurrentOpacity = getOpacityForFormat(format); 195 196 mSurfaceFlingerConsumer->setDefaultBufferSize(w, h); 197 mSurfaceFlingerConsumer->setDefaultBufferFormat(format); 198 mSurfaceFlingerConsumer->setConsumerUsageBits(getEffectiveUsage(0)); 199 200 return NO_ERROR; 201} 202 203sp<IBinder> Layer::getHandle() { 204 Mutex::Autolock _l(mLock); 205 206 LOG_ALWAYS_FATAL_IF(mHasSurface, 207 "Layer::getHandle() has already been called"); 208 209 mHasSurface = true; 210 211 /* 212 * The layer handle is just a BBinder object passed to the client 213 * (remote process) -- we don't keep any reference on our side such that 214 * the dtor is called when the remote side let go of its reference. 215 * 216 * LayerCleaner ensures that mFlinger->onLayerDestroyed() is called for 217 * this layer when the handle is destroyed. 218 */ 219 220 class Handle : public BBinder, public LayerCleaner { 221 wp<const Layer> mOwner; 222 public: 223 Handle(const sp<SurfaceFlinger>& flinger, const sp<Layer>& layer) 224 : LayerCleaner(flinger, layer), mOwner(layer) { 225 } 226 }; 227 228 return new Handle(mFlinger, this); 229} 230 231sp<BufferQueue> Layer::getBufferQueue() const { 232 return mSurfaceFlingerConsumer->getBufferQueue(); 233} 234 235// --------------------------------------------------------------------------- 236// h/w composer set-up 237// --------------------------------------------------------------------------- 238 239Rect Layer::getContentCrop() const { 240 // this is the crop rectangle that applies to the buffer 241 // itself (as opposed to the window) 242 Rect crop; 243 if (!mCurrentCrop.isEmpty()) { 244 // if the buffer crop is defined, we use that 245 crop = mCurrentCrop; 246 } else if (mActiveBuffer != NULL) { 247 // otherwise we use the whole buffer 248 crop = mActiveBuffer->getBounds(); 249 } else { 250 // if we don't have a buffer yet, we use an empty/invalid crop 251 crop.makeInvalid(); 252 } 253 return crop; 254} 255 256static Rect reduce(const Rect& win, const Region& exclude) { 257 if (CC_LIKELY(exclude.isEmpty())) { 258 return win; 259 } 260 if (exclude.isRect()) { 261 return win.reduce(exclude.getBounds()); 262 } 263 return Region(win).subtract(exclude).getBounds(); 264} 265 266Rect Layer::computeBounds() const { 267 const Layer::State& s(getDrawingState()); 268 Rect win(s.active.w, s.active.h); 269 if (!s.active.crop.isEmpty()) { 270 win.intersect(s.active.crop, &win); 271 } 272 // subtract the transparent region and snap to the bounds 273 return reduce(win, s.activeTransparentRegion); 274} 275 276FloatRect Layer::computeCrop(const sp<const DisplayDevice>& hw) const { 277 // the content crop is the area of the content that gets scaled to the 278 // layer's size. 279 FloatRect crop(getContentCrop()); 280 281 // the active.crop is the area of the window that gets cropped, but not 282 // scaled in any ways. 283 const State& s(getDrawingState()); 284 285 // apply the projection's clipping to the window crop in 286 // layerstack space, and convert-back to layer space. 287 // if there are no window scaling involved, this operation will map to full 288 // pixels in the buffer. 289 // FIXME: the 3 lines below can produce slightly incorrect clipping when we have 290 // a viewport clipping and a window transform. we should use floating point to fix this. 291 Rect activeCrop(s.transform.transform(s.active.crop)); 292 activeCrop.intersect(hw->getViewport(), &activeCrop); 293 activeCrop = s.transform.inverse().transform(activeCrop); 294 295 // paranoia: make sure the window-crop is constrained in the 296 // window's bounds 297 activeCrop.intersect(Rect(s.active.w, s.active.h), &activeCrop); 298 299 // subtract the transparent region and snap to the bounds 300 activeCrop = reduce(activeCrop, s.activeTransparentRegion); 301 302 if (!activeCrop.isEmpty()) { 303 // Transform the window crop to match the buffer coordinate system, 304 // which means using the inverse of the current transform set on the 305 // SurfaceFlingerConsumer. 306 uint32_t invTransform = mCurrentTransform; 307 int winWidth = s.active.w; 308 int winHeight = s.active.h; 309 if (invTransform & NATIVE_WINDOW_TRANSFORM_ROT_90) { 310 invTransform ^= NATIVE_WINDOW_TRANSFORM_FLIP_V | 311 NATIVE_WINDOW_TRANSFORM_FLIP_H; 312 winWidth = s.active.h; 313 winHeight = s.active.w; 314 } 315 const Rect winCrop = activeCrop.transform( 316 invTransform, s.active.w, s.active.h); 317 318 // below, crop is intersected with winCrop expressed in crop's coordinate space 319 float xScale = crop.getWidth() / float(winWidth); 320 float yScale = crop.getHeight() / float(winHeight); 321 322 float insetL = winCrop.left * xScale; 323 float insetT = winCrop.top * yScale; 324 float insetR = (winWidth - winCrop.right ) * xScale; 325 float insetB = (winHeight - winCrop.bottom) * yScale; 326 327 crop.left += insetL; 328 crop.top += insetT; 329 crop.right -= insetR; 330 crop.bottom -= insetB; 331 } 332 return crop; 333} 334 335void Layer::setGeometry( 336 const sp<const DisplayDevice>& hw, 337 HWComposer::HWCLayerInterface& layer) 338{ 339 layer.setDefaultState(); 340 341 // enable this layer 342 layer.setSkip(false); 343 344 if (isSecure() && !hw->isSecure()) { 345 layer.setSkip(true); 346 } 347 348 // this gives us only the "orientation" component of the transform 349 const State& s(getDrawingState()); 350 if (!isOpaque() || s.alpha != 0xFF) { 351 layer.setBlending(mPremultipliedAlpha ? 352 HWC_BLENDING_PREMULT : 353 HWC_BLENDING_COVERAGE); 354 } 355 356 // apply the layer's transform, followed by the display's global transform 357 // here we're guaranteed that the layer's transform preserves rects 358 Rect frame(s.transform.transform(computeBounds())); 359 frame.intersect(hw->getViewport(), &frame); 360 const Transform& tr(hw->getTransform()); 361 layer.setFrame(tr.transform(frame)); 362 layer.setCrop(computeCrop(hw)); 363 layer.setPlaneAlpha(s.alpha); 364 365 /* 366 * Transformations are applied in this order: 367 * 1) buffer orientation/flip/mirror 368 * 2) state transformation (window manager) 369 * 3) layer orientation (screen orientation) 370 * (NOTE: the matrices are multiplied in reverse order) 371 */ 372 373 const Transform bufferOrientation(mCurrentTransform); 374 const Transform transform(tr * s.transform * bufferOrientation); 375 376 // this gives us only the "orientation" component of the transform 377 const uint32_t orientation = transform.getOrientation(); 378 if (orientation & Transform::ROT_INVALID) { 379 // we can only handle simple transformation 380 layer.setSkip(true); 381 } else { 382 layer.setTransform(orientation); 383 } 384} 385 386void Layer::setPerFrameData(const sp<const DisplayDevice>& hw, 387 HWComposer::HWCLayerInterface& layer) { 388 // we have to set the visible region on every frame because 389 // we currently free it during onLayerDisplayed(), which is called 390 // after HWComposer::commit() -- every frame. 391 // Apply this display's projection's viewport to the visible region 392 // before giving it to the HWC HAL. 393 const Transform& tr = hw->getTransform(); 394 Region visible = tr.transform(visibleRegion.intersect(hw->getViewport())); 395 layer.setVisibleRegionScreen(visible); 396 397 // NOTE: buffer can be NULL if the client never drew into this 398 // layer yet, or if we ran out of memory 399 layer.setBuffer(mActiveBuffer); 400} 401 402void Layer::setAcquireFence(const sp<const DisplayDevice>& hw, 403 HWComposer::HWCLayerInterface& layer) { 404 int fenceFd = -1; 405 406 // TODO: there is a possible optimization here: we only need to set the 407 // acquire fence the first time a new buffer is acquired on EACH display. 408 409 if (layer.getCompositionType() == HWC_OVERLAY) { 410 sp<Fence> fence = mSurfaceFlingerConsumer->getCurrentFence(); 411 if (fence->isValid()) { 412 fenceFd = fence->dup(); 413 if (fenceFd == -1) { 414 ALOGW("failed to dup layer fence, skipping sync: %d", errno); 415 } 416 } 417 } 418 layer.setAcquireFenceFd(fenceFd); 419} 420 421// --------------------------------------------------------------------------- 422// drawing... 423// --------------------------------------------------------------------------- 424 425void Layer::draw(const sp<const DisplayDevice>& hw, const Region& clip) const { 426 onDraw(hw, clip); 427} 428 429void Layer::draw(const sp<const DisplayDevice>& hw) { 430 onDraw( hw, Region(hw->bounds()) ); 431} 432 433void Layer::onDraw(const sp<const DisplayDevice>& hw, const Region& clip) const 434{ 435 ATRACE_CALL(); 436 437 if (CC_UNLIKELY(mActiveBuffer == 0)) { 438 // the texture has not been created yet, this Layer has 439 // in fact never been drawn into. This happens frequently with 440 // SurfaceView because the WindowManager can't know when the client 441 // has drawn the first time. 442 443 // If there is nothing under us, we paint the screen in black, otherwise 444 // we just skip this update. 445 446 // figure out if there is something below us 447 Region under; 448 const SurfaceFlinger::LayerVector& drawingLayers( 449 mFlinger->mDrawingState.layersSortedByZ); 450 const size_t count = drawingLayers.size(); 451 for (size_t i=0 ; i<count ; ++i) { 452 const sp<Layer>& layer(drawingLayers[i]); 453 if (layer.get() == static_cast<Layer const*>(this)) 454 break; 455 under.orSelf( hw->getTransform().transform(layer->visibleRegion) ); 456 } 457 // if not everything below us is covered, we plug the holes! 458 Region holes(clip.subtract(under)); 459 if (!holes.isEmpty()) { 460 clearWithOpenGL(hw, holes, 0, 0, 0, 1); 461 } 462 return; 463 } 464 465 // Bind the current buffer to the GL texture, and wait for it to be 466 // ready for us to draw into. 467 status_t err = mSurfaceFlingerConsumer->bindTextureImage(); 468 if (err != NO_ERROR) { 469 ALOGW("onDraw: bindTextureImage failed (err=%d)", err); 470 // Go ahead and draw the buffer anyway; no matter what we do the screen 471 // is probably going to have something visibly wrong. 472 } 473 474 bool blackOutLayer = isProtected() || (isSecure() && !hw->isSecure()); 475 476 RenderEngine& engine(mFlinger->getRenderEngine()); 477 478 if (!blackOutLayer) { 479 // TODO: we could be more subtle with isFixedSize() 480 const bool useFiltering = getFiltering() || needsFiltering(hw) || isFixedSize(); 481 482 // Query the texture matrix given our current filtering mode. 483 float textureMatrix[16]; 484 mSurfaceFlingerConsumer->setFilteringEnabled(useFiltering); 485 mSurfaceFlingerConsumer->getTransformMatrix(textureMatrix); 486 487 // Set things up for texturing. 488 engine.setupLayerTexturing(mTextureName, useFiltering, textureMatrix); 489 } else { 490 engine.setupLayerBlackedOut(); 491 } 492 drawWithOpenGL(hw, clip); 493 engine.disableTexturing(); 494} 495 496 497void Layer::clearWithOpenGL(const sp<const DisplayDevice>& hw, const Region& clip, 498 GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha) const 499{ 500 LayerMesh mesh; 501 computeGeometry(hw, &mesh); 502 503 mFlinger->getRenderEngine().clearWithColor( 504 mesh.getVertices(), mesh.getVertexCount(), 505 red, green, blue, alpha); 506} 507 508void Layer::clearWithOpenGL( 509 const sp<const DisplayDevice>& hw, const Region& clip) const { 510 clearWithOpenGL(hw, clip, 0,0,0,0); 511} 512 513void Layer::drawWithOpenGL( 514 const sp<const DisplayDevice>& hw, const Region& clip) const { 515 const uint32_t fbHeight = hw->getHeight(); 516 const State& s(getDrawingState()); 517 518 LayerMesh mesh; 519 computeGeometry(hw, &mesh); 520 521 /* 522 * NOTE: the way we compute the texture coordinates here produces 523 * different results than when we take the HWC path -- in the later case 524 * the "source crop" is rounded to texel boundaries. 525 * This can produce significantly different results when the texture 526 * is scaled by a large amount. 527 * 528 * The GL code below is more logical (imho), and the difference with 529 * HWC is due to a limitation of the HWC API to integers -- a question 530 * is suspend is wether we should ignore this problem or revert to 531 * GL composition when a buffer scaling is applied (maybe with some 532 * minimal value)? Or, we could make GL behave like HWC -- but this feel 533 * like more of a hack. 534 */ 535 const Rect win(computeBounds()); 536 537 GLfloat left = GLfloat(win.left) / GLfloat(s.active.w); 538 GLfloat top = GLfloat(win.top) / GLfloat(s.active.h); 539 GLfloat right = GLfloat(win.right) / GLfloat(s.active.w); 540 GLfloat bottom = GLfloat(win.bottom) / GLfloat(s.active.h); 541 542 // TODO: we probably want to generate the texture coords with the mesh 543 // here we assume that we only have 4 vertices 544 float texCoords[4][2]; 545 texCoords[0][0] = left; 546 texCoords[0][1] = top; 547 texCoords[1][0] = left; 548 texCoords[1][1] = bottom; 549 texCoords[2][0] = right; 550 texCoords[2][1] = bottom; 551 texCoords[3][0] = right; 552 texCoords[3][1] = top; 553 for (int i = 0; i < 4; i++) { 554 texCoords[i][1] = 1.0f - texCoords[i][1]; 555 } 556 557 RenderEngine& engine(mFlinger->getRenderEngine()); 558 engine.setupLayerBlending(mPremultipliedAlpha, isOpaque(), s.alpha); 559 engine.drawMesh2D(mesh.getVertices(), texCoords, mesh.getVertexCount()); 560 engine.disableBlending(); 561} 562 563void Layer::setFiltering(bool filtering) { 564 mFiltering = filtering; 565} 566 567bool Layer::getFiltering() const { 568 return mFiltering; 569} 570 571// As documented in libhardware header, formats in the range 572// 0x100 - 0x1FF are specific to the HAL implementation, and 573// are known to have no alpha channel 574// TODO: move definition for device-specific range into 575// hardware.h, instead of using hard-coded values here. 576#define HARDWARE_IS_DEVICE_FORMAT(f) ((f) >= 0x100 && (f) <= 0x1FF) 577 578bool Layer::getOpacityForFormat(uint32_t format) { 579 if (HARDWARE_IS_DEVICE_FORMAT(format)) { 580 return true; 581 } 582 switch (format) { 583 case HAL_PIXEL_FORMAT_RGBA_8888: 584 case HAL_PIXEL_FORMAT_BGRA_8888: 585 case HAL_PIXEL_FORMAT_RGBA_5551: 586 case HAL_PIXEL_FORMAT_RGBA_4444: 587 return false; 588 } 589 // in all other case, we have no blending (also for unknown formats) 590 return true; 591} 592 593// ---------------------------------------------------------------------------- 594// local state 595// ---------------------------------------------------------------------------- 596 597void Layer::computeGeometry(const sp<const DisplayDevice>& hw, LayerMesh* mesh) const 598{ 599 const Layer::State& s(getDrawingState()); 600 const Transform tr(hw->getTransform() * s.transform); 601 const uint32_t hw_h = hw->getHeight(); 602 Rect win(s.active.w, s.active.h); 603 if (!s.active.crop.isEmpty()) { 604 win.intersect(s.active.crop, &win); 605 } 606 // subtract the transparent region and snap to the bounds 607 win = reduce(win, s.activeTransparentRegion); 608 if (mesh) { 609 tr.transform(mesh->mVertices[0], win.left, win.top); 610 tr.transform(mesh->mVertices[1], win.left, win.bottom); 611 tr.transform(mesh->mVertices[2], win.right, win.bottom); 612 tr.transform(mesh->mVertices[3], win.right, win.top); 613 for (size_t i=0 ; i<4 ; i++) { 614 mesh->mVertices[i][1] = hw_h - mesh->mVertices[i][1]; 615 } 616 } 617} 618 619bool Layer::isOpaque() const 620{ 621 // if we don't have a buffer yet, we're translucent regardless of the 622 // layer's opaque flag. 623 if (mActiveBuffer == 0) { 624 return false; 625 } 626 627 // if the layer has the opaque flag, then we're always opaque, 628 // otherwise we use the current buffer's format. 629 return mOpaqueLayer || mCurrentOpacity; 630} 631 632bool Layer::isProtected() const 633{ 634 const sp<GraphicBuffer>& activeBuffer(mActiveBuffer); 635 return (activeBuffer != 0) && 636 (activeBuffer->getUsage() & GRALLOC_USAGE_PROTECTED); 637} 638 639bool Layer::isFixedSize() const { 640 return mCurrentScalingMode != NATIVE_WINDOW_SCALING_MODE_FREEZE; 641} 642 643bool Layer::isCropped() const { 644 return !mCurrentCrop.isEmpty(); 645} 646 647bool Layer::needsFiltering(const sp<const DisplayDevice>& hw) const { 648 return mNeedsFiltering || hw->needsFiltering(); 649} 650 651void Layer::setVisibleRegion(const Region& visibleRegion) { 652 // always called from main thread 653 this->visibleRegion = visibleRegion; 654} 655 656void Layer::setCoveredRegion(const Region& coveredRegion) { 657 // always called from main thread 658 this->coveredRegion = coveredRegion; 659} 660 661void Layer::setVisibleNonTransparentRegion(const Region& 662 setVisibleNonTransparentRegion) { 663 // always called from main thread 664 this->visibleNonTransparentRegion = setVisibleNonTransparentRegion; 665} 666 667// ---------------------------------------------------------------------------- 668// transaction 669// ---------------------------------------------------------------------------- 670 671uint32_t Layer::doTransaction(uint32_t flags) { 672 ATRACE_CALL(); 673 674 const Layer::State& s(getDrawingState()); 675 const Layer::State& c(getCurrentState()); 676 677 const bool sizeChanged = (c.requested.w != s.requested.w) || 678 (c.requested.h != s.requested.h); 679 680 if (sizeChanged) { 681 // the size changed, we need to ask our client to request a new buffer 682 ALOGD_IF(DEBUG_RESIZE, 683 "doTransaction: geometry (layer=%p '%s'), tr=%02x, scalingMode=%d\n" 684 " current={ active ={ wh={%4u,%4u} crop={%4d,%4d,%4d,%4d} (%4d,%4d) }\n" 685 " requested={ wh={%4u,%4u} crop={%4d,%4d,%4d,%4d} (%4d,%4d) }}\n" 686 " drawing={ active ={ wh={%4u,%4u} crop={%4d,%4d,%4d,%4d} (%4d,%4d) }\n" 687 " requested={ wh={%4u,%4u} crop={%4d,%4d,%4d,%4d} (%4d,%4d) }}\n", 688 this, getName().string(), mCurrentTransform, mCurrentScalingMode, 689 c.active.w, c.active.h, 690 c.active.crop.left, 691 c.active.crop.top, 692 c.active.crop.right, 693 c.active.crop.bottom, 694 c.active.crop.getWidth(), 695 c.active.crop.getHeight(), 696 c.requested.w, c.requested.h, 697 c.requested.crop.left, 698 c.requested.crop.top, 699 c.requested.crop.right, 700 c.requested.crop.bottom, 701 c.requested.crop.getWidth(), 702 c.requested.crop.getHeight(), 703 s.active.w, s.active.h, 704 s.active.crop.left, 705 s.active.crop.top, 706 s.active.crop.right, 707 s.active.crop.bottom, 708 s.active.crop.getWidth(), 709 s.active.crop.getHeight(), 710 s.requested.w, s.requested.h, 711 s.requested.crop.left, 712 s.requested.crop.top, 713 s.requested.crop.right, 714 s.requested.crop.bottom, 715 s.requested.crop.getWidth(), 716 s.requested.crop.getHeight()); 717 718 // record the new size, form this point on, when the client request 719 // a buffer, it'll get the new size. 720 mSurfaceFlingerConsumer->setDefaultBufferSize( 721 c.requested.w, c.requested.h); 722 } 723 724 if (!isFixedSize()) { 725 726 const bool resizePending = (c.requested.w != c.active.w) || 727 (c.requested.h != c.active.h); 728 729 if (resizePending) { 730 // don't let Layer::doTransaction update the drawing state 731 // if we have a pending resize, unless we are in fixed-size mode. 732 // the drawing state will be updated only once we receive a buffer 733 // with the correct size. 734 // 735 // in particular, we want to make sure the clip (which is part 736 // of the geometry state) is latched together with the size but is 737 // latched immediately when no resizing is involved. 738 739 flags |= eDontUpdateGeometryState; 740 } 741 } 742 743 // always set active to requested, unless we're asked not to 744 // this is used by Layer, which special cases resizes. 745 if (flags & eDontUpdateGeometryState) { 746 } else { 747 Layer::State& editCurrentState(getCurrentState()); 748 editCurrentState.active = c.requested; 749 } 750 751 if (s.active != c.active) { 752 // invalidate and recompute the visible regions if needed 753 flags |= Layer::eVisibleRegion; 754 } 755 756 if (c.sequence != s.sequence) { 757 // invalidate and recompute the visible regions if needed 758 flags |= eVisibleRegion; 759 this->contentDirty = true; 760 761 // we may use linear filtering, if the matrix scales us 762 const uint8_t type = c.transform.getType(); 763 mNeedsFiltering = (!c.transform.preserveRects() || 764 (type >= Transform::SCALE)); 765 } 766 767 // Commit the transaction 768 commitTransaction(); 769 return flags; 770} 771 772void Layer::commitTransaction() { 773 mDrawingState = mCurrentState; 774} 775 776uint32_t Layer::getTransactionFlags(uint32_t flags) { 777 return android_atomic_and(~flags, &mTransactionFlags) & flags; 778} 779 780uint32_t Layer::setTransactionFlags(uint32_t flags) { 781 return android_atomic_or(flags, &mTransactionFlags); 782} 783 784bool Layer::setPosition(float x, float y) { 785 if (mCurrentState.transform.tx() == x && mCurrentState.transform.ty() == y) 786 return false; 787 mCurrentState.sequence++; 788 mCurrentState.transform.set(x, y); 789 setTransactionFlags(eTransactionNeeded); 790 return true; 791} 792bool Layer::setLayer(uint32_t z) { 793 if (mCurrentState.z == z) 794 return false; 795 mCurrentState.sequence++; 796 mCurrentState.z = z; 797 setTransactionFlags(eTransactionNeeded); 798 return true; 799} 800bool Layer::setSize(uint32_t w, uint32_t h) { 801 if (mCurrentState.requested.w == w && mCurrentState.requested.h == h) 802 return false; 803 mCurrentState.requested.w = w; 804 mCurrentState.requested.h = h; 805 setTransactionFlags(eTransactionNeeded); 806 return true; 807} 808bool Layer::setAlpha(uint8_t alpha) { 809 if (mCurrentState.alpha == alpha) 810 return false; 811 mCurrentState.sequence++; 812 mCurrentState.alpha = alpha; 813 setTransactionFlags(eTransactionNeeded); 814 return true; 815} 816bool Layer::setMatrix(const layer_state_t::matrix22_t& matrix) { 817 mCurrentState.sequence++; 818 mCurrentState.transform.set( 819 matrix.dsdx, matrix.dsdy, matrix.dtdx, matrix.dtdy); 820 setTransactionFlags(eTransactionNeeded); 821 return true; 822} 823bool Layer::setTransparentRegionHint(const Region& transparent) { 824 mCurrentState.requestedTransparentRegion = transparent; 825 setTransactionFlags(eTransactionNeeded); 826 return true; 827} 828bool Layer::setFlags(uint8_t flags, uint8_t mask) { 829 const uint32_t newFlags = (mCurrentState.flags & ~mask) | (flags & mask); 830 if (mCurrentState.flags == newFlags) 831 return false; 832 mCurrentState.sequence++; 833 mCurrentState.flags = newFlags; 834 setTransactionFlags(eTransactionNeeded); 835 return true; 836} 837bool Layer::setCrop(const Rect& crop) { 838 if (mCurrentState.requested.crop == crop) 839 return false; 840 mCurrentState.sequence++; 841 mCurrentState.requested.crop = crop; 842 setTransactionFlags(eTransactionNeeded); 843 return true; 844} 845 846bool Layer::setLayerStack(uint32_t layerStack) { 847 if (mCurrentState.layerStack == layerStack) 848 return false; 849 mCurrentState.sequence++; 850 mCurrentState.layerStack = layerStack; 851 setTransactionFlags(eTransactionNeeded); 852 return true; 853} 854 855// ---------------------------------------------------------------------------- 856// pageflip handling... 857// ---------------------------------------------------------------------------- 858 859bool Layer::onPreComposition() { 860 mRefreshPending = false; 861 return mQueuedFrames > 0; 862} 863 864void Layer::onPostComposition() { 865 if (mFrameLatencyNeeded) { 866 nsecs_t desiredPresentTime = mSurfaceFlingerConsumer->getTimestamp(); 867 mFrameTracker.setDesiredPresentTime(desiredPresentTime); 868 869 sp<Fence> frameReadyFence = mSurfaceFlingerConsumer->getCurrentFence(); 870 if (frameReadyFence->isValid()) { 871 mFrameTracker.setFrameReadyFence(frameReadyFence); 872 } else { 873 // There was no fence for this frame, so assume that it was ready 874 // to be presented at the desired present time. 875 mFrameTracker.setFrameReadyTime(desiredPresentTime); 876 } 877 878 const HWComposer& hwc = mFlinger->getHwComposer(); 879 sp<Fence> presentFence = hwc.getDisplayFence(HWC_DISPLAY_PRIMARY); 880 if (presentFence->isValid()) { 881 mFrameTracker.setActualPresentFence(presentFence); 882 } else { 883 // The HWC doesn't support present fences, so use the refresh 884 // timestamp instead. 885 nsecs_t presentTime = hwc.getRefreshTimestamp(HWC_DISPLAY_PRIMARY); 886 mFrameTracker.setActualPresentTime(presentTime); 887 } 888 889 mFrameTracker.advanceFrame(); 890 mFrameLatencyNeeded = false; 891 } 892} 893 894bool Layer::isVisible() const { 895 const Layer::State& s(mDrawingState); 896 return !(s.flags & layer_state_t::eLayerHidden) && s.alpha 897 && (mActiveBuffer != NULL); 898} 899 900Region Layer::latchBuffer(bool& recomputeVisibleRegions) 901{ 902 ATRACE_CALL(); 903 904 Region outDirtyRegion; 905 if (mQueuedFrames > 0) { 906 907 // if we've already called updateTexImage() without going through 908 // a composition step, we have to skip this layer at this point 909 // because we cannot call updateTeximage() without a corresponding 910 // compositionComplete() call. 911 // we'll trigger an update in onPreComposition(). 912 if (mRefreshPending) { 913 return outDirtyRegion; 914 } 915 916 // Capture the old state of the layer for comparisons later 917 const bool oldOpacity = isOpaque(); 918 sp<GraphicBuffer> oldActiveBuffer = mActiveBuffer; 919 920 struct Reject : public SurfaceFlingerConsumer::BufferRejecter { 921 Layer::State& front; 922 Layer::State& current; 923 bool& recomputeVisibleRegions; 924 Reject(Layer::State& front, Layer::State& current, 925 bool& recomputeVisibleRegions) 926 : front(front), current(current), 927 recomputeVisibleRegions(recomputeVisibleRegions) { 928 } 929 930 virtual bool reject(const sp<GraphicBuffer>& buf, 931 const BufferQueue::BufferItem& item) { 932 if (buf == NULL) { 933 return false; 934 } 935 936 uint32_t bufWidth = buf->getWidth(); 937 uint32_t bufHeight = buf->getHeight(); 938 939 // check that we received a buffer of the right size 940 // (Take the buffer's orientation into account) 941 if (item.mTransform & Transform::ROT_90) { 942 swap(bufWidth, bufHeight); 943 } 944 945 bool isFixedSize = item.mScalingMode != NATIVE_WINDOW_SCALING_MODE_FREEZE; 946 if (front.active != front.requested) { 947 948 if (isFixedSize || 949 (bufWidth == front.requested.w && 950 bufHeight == front.requested.h)) 951 { 952 // Here we pretend the transaction happened by updating the 953 // current and drawing states. Drawing state is only accessed 954 // in this thread, no need to have it locked 955 front.active = front.requested; 956 957 // We also need to update the current state so that 958 // we don't end-up overwriting the drawing state with 959 // this stale current state during the next transaction 960 // 961 // NOTE: We don't need to hold the transaction lock here 962 // because State::active is only accessed from this thread. 963 current.active = front.active; 964 965 // recompute visible region 966 recomputeVisibleRegions = true; 967 } 968 969 ALOGD_IF(DEBUG_RESIZE, 970 "latchBuffer/reject: buffer (%ux%u, tr=%02x), scalingMode=%d\n" 971 " drawing={ active ={ wh={%4u,%4u} crop={%4d,%4d,%4d,%4d} (%4d,%4d) }\n" 972 " requested={ wh={%4u,%4u} crop={%4d,%4d,%4d,%4d} (%4d,%4d) }}\n", 973 bufWidth, bufHeight, item.mTransform, item.mScalingMode, 974 front.active.w, front.active.h, 975 front.active.crop.left, 976 front.active.crop.top, 977 front.active.crop.right, 978 front.active.crop.bottom, 979 front.active.crop.getWidth(), 980 front.active.crop.getHeight(), 981 front.requested.w, front.requested.h, 982 front.requested.crop.left, 983 front.requested.crop.top, 984 front.requested.crop.right, 985 front.requested.crop.bottom, 986 front.requested.crop.getWidth(), 987 front.requested.crop.getHeight()); 988 } 989 990 if (!isFixedSize) { 991 if (front.active.w != bufWidth || 992 front.active.h != bufHeight) { 993 // reject this buffer 994 return true; 995 } 996 } 997 998 // if the transparent region has changed (this test is 999 // conservative, but that's fine, worst case we're doing 1000 // a bit of extra work), we latch the new one and we 1001 // trigger a visible-region recompute. 1002 if (!front.activeTransparentRegion.isTriviallyEqual( 1003 front.requestedTransparentRegion)) { 1004 front.activeTransparentRegion = front.requestedTransparentRegion; 1005 1006 // We also need to update the current state so that 1007 // we don't end-up overwriting the drawing state with 1008 // this stale current state during the next transaction 1009 // 1010 // NOTE: We don't need to hold the transaction lock here 1011 // because State::active is only accessed from this thread. 1012 current.activeTransparentRegion = front.activeTransparentRegion; 1013 1014 // recompute visible region 1015 recomputeVisibleRegions = true; 1016 } 1017 1018 return false; 1019 } 1020 }; 1021 1022 1023 Reject r(mDrawingState, getCurrentState(), recomputeVisibleRegions); 1024 1025 status_t updateResult = mSurfaceFlingerConsumer->updateTexImage(&r); 1026 if (updateResult == BufferQueue::PRESENT_LATER) { 1027 // Producer doesn't want buffer to be displayed yet. Signal a 1028 // layer update so we check again at the next opportunity. 1029 mFlinger->signalLayerUpdate(); 1030 return outDirtyRegion; 1031 } 1032 1033 // Decrement the queued-frames count. Signal another event if we 1034 // have more frames pending. 1035 if (android_atomic_dec(&mQueuedFrames) > 1) { 1036 mFlinger->signalLayerUpdate(); 1037 } 1038 1039 if (updateResult != NO_ERROR) { 1040 // something happened! 1041 recomputeVisibleRegions = true; 1042 return outDirtyRegion; 1043 } 1044 1045 // update the active buffer 1046 mActiveBuffer = mSurfaceFlingerConsumer->getCurrentBuffer(); 1047 if (mActiveBuffer == NULL) { 1048 // this can only happen if the very first buffer was rejected. 1049 return outDirtyRegion; 1050 } 1051 1052 mRefreshPending = true; 1053 mFrameLatencyNeeded = true; 1054 if (oldActiveBuffer == NULL) { 1055 // the first time we receive a buffer, we need to trigger a 1056 // geometry invalidation. 1057 recomputeVisibleRegions = true; 1058 } 1059 1060 Rect crop(mSurfaceFlingerConsumer->getCurrentCrop()); 1061 const uint32_t transform(mSurfaceFlingerConsumer->getCurrentTransform()); 1062 const uint32_t scalingMode(mSurfaceFlingerConsumer->getCurrentScalingMode()); 1063 if ((crop != mCurrentCrop) || 1064 (transform != mCurrentTransform) || 1065 (scalingMode != mCurrentScalingMode)) 1066 { 1067 mCurrentCrop = crop; 1068 mCurrentTransform = transform; 1069 mCurrentScalingMode = scalingMode; 1070 recomputeVisibleRegions = true; 1071 } 1072 1073 if (oldActiveBuffer != NULL) { 1074 uint32_t bufWidth = mActiveBuffer->getWidth(); 1075 uint32_t bufHeight = mActiveBuffer->getHeight(); 1076 if (bufWidth != uint32_t(oldActiveBuffer->width) || 1077 bufHeight != uint32_t(oldActiveBuffer->height)) { 1078 recomputeVisibleRegions = true; 1079 } 1080 } 1081 1082 mCurrentOpacity = getOpacityForFormat(mActiveBuffer->format); 1083 if (oldOpacity != isOpaque()) { 1084 recomputeVisibleRegions = true; 1085 } 1086 1087 // FIXME: postedRegion should be dirty & bounds 1088 const Layer::State& s(getDrawingState()); 1089 Region dirtyRegion(Rect(s.active.w, s.active.h)); 1090 1091 // transform the dirty region to window-manager space 1092 outDirtyRegion = (s.transform.transform(dirtyRegion)); 1093 } 1094 return outDirtyRegion; 1095} 1096 1097uint32_t Layer::getEffectiveUsage(uint32_t usage) const 1098{ 1099 // TODO: should we do something special if mSecure is set? 1100 if (mProtectedByApp) { 1101 // need a hardware-protected path to external video sink 1102 usage |= GraphicBuffer::USAGE_PROTECTED; 1103 } 1104 usage |= GraphicBuffer::USAGE_HW_COMPOSER; 1105 return usage; 1106} 1107 1108void Layer::updateTransformHint(const sp<const DisplayDevice>& hw) const { 1109 uint32_t orientation = 0; 1110 if (!mFlinger->mDebugDisableTransformHint) { 1111 // The transform hint is used to improve performance, but we can 1112 // only have a single transform hint, it cannot 1113 // apply to all displays. 1114 const Transform& planeTransform(hw->getTransform()); 1115 orientation = planeTransform.getOrientation(); 1116 if (orientation & Transform::ROT_INVALID) { 1117 orientation = 0; 1118 } 1119 } 1120 mSurfaceFlingerConsumer->setTransformHint(orientation); 1121} 1122 1123// ---------------------------------------------------------------------------- 1124// debugging 1125// ---------------------------------------------------------------------------- 1126 1127void Layer::dump(String8& result, Colorizer& colorizer) const 1128{ 1129 const Layer::State& s(getDrawingState()); 1130 1131 colorizer.colorize(result, Colorizer::GREEN); 1132 result.appendFormat( 1133 "+ %s %p (%s)\n", 1134 getTypeId(), this, getName().string()); 1135 colorizer.reset(result); 1136 1137 s.activeTransparentRegion.dump(result, "transparentRegion"); 1138 visibleRegion.dump(result, "visibleRegion"); 1139 sp<Client> client(mClientRef.promote()); 1140 1141 result.appendFormat( " " 1142 "layerStack=%4d, z=%9d, pos=(%g,%g), size=(%4d,%4d), crop=(%4d,%4d,%4d,%4d), " 1143 "isOpaque=%1d, invalidate=%1d, " 1144 "alpha=0x%02x, flags=0x%08x, tr=[%.2f, %.2f][%.2f, %.2f]\n" 1145 " client=%p\n", 1146 s.layerStack, s.z, s.transform.tx(), s.transform.ty(), s.active.w, s.active.h, 1147 s.active.crop.left, s.active.crop.top, 1148 s.active.crop.right, s.active.crop.bottom, 1149 isOpaque(), contentDirty, 1150 s.alpha, s.flags, 1151 s.transform[0][0], s.transform[0][1], 1152 s.transform[1][0], s.transform[1][1], 1153 client.get()); 1154 1155 sp<const GraphicBuffer> buf0(mActiveBuffer); 1156 uint32_t w0=0, h0=0, s0=0, f0=0; 1157 if (buf0 != 0) { 1158 w0 = buf0->getWidth(); 1159 h0 = buf0->getHeight(); 1160 s0 = buf0->getStride(); 1161 f0 = buf0->format; 1162 } 1163 result.appendFormat( 1164 " " 1165 "format=%2d, activeBuffer=[%4ux%4u:%4u,%3X]," 1166 " queued-frames=%d, mRefreshPending=%d\n", 1167 mFormat, w0, h0, s0,f0, 1168 mQueuedFrames, mRefreshPending); 1169 1170 if (mSurfaceFlingerConsumer != 0) { 1171 mSurfaceFlingerConsumer->dump(result, " "); 1172 } 1173} 1174 1175void Layer::dumpStats(String8& result) const { 1176 mFrameTracker.dump(result); 1177} 1178 1179void Layer::clearStats() { 1180 mFrameTracker.clear(); 1181} 1182 1183void Layer::logFrameStats() { 1184 mFrameTracker.logAndResetStats(mName); 1185} 1186 1187// --------------------------------------------------------------------------- 1188 1189Layer::LayerCleaner::LayerCleaner(const sp<SurfaceFlinger>& flinger, 1190 const sp<Layer>& layer) 1191 : mFlinger(flinger), mLayer(layer) { 1192} 1193 1194Layer::LayerCleaner::~LayerCleaner() { 1195 // destroy client resources 1196 mFlinger->onLayerDestroyed(mLayer); 1197} 1198 1199// --------------------------------------------------------------------------- 1200 1201 1202}; // namespace android 1203