Layer.cpp revision 9575f60722f7a4f54384fe0be6938a8de48dc23a
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/compiler.h> 22#include <cutils/native_handle.h> 23#include <cutils/properties.h> 24 25#include <utils/Errors.h> 26#include <utils/Log.h> 27#include <utils/StopWatch.h> 28 29#include <ui/GraphicBuffer.h> 30#include <ui/PixelFormat.h> 31 32#include <surfaceflinger/Surface.h> 33 34#include "clz.h" 35#include "DisplayHardware/DisplayHardware.h" 36#include "DisplayHardware/HWComposer.h" 37#include "GLExtensions.h" 38#include "Layer.h" 39#include "SurfaceFlinger.h" 40#include "SurfaceTextureLayer.h" 41 42#define DEBUG_RESIZE 0 43 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 mFormat(PIXEL_FORMAT_NONE), 58 mGLExtensions(GLExtensions::getInstance()), 59 mOpaqueLayer(true), 60 mNeedsDithering(false), 61 mSecure(false), 62 mProtectedByApp(false) 63{ 64 mCurrentCrop.makeInvalid(); 65 glGenTextures(1, &mTextureName); 66} 67 68void Layer::onFirstRef() 69{ 70 LayerBaseClient::onFirstRef(); 71 72 struct FrameQueuedListener : public SurfaceTexture::FrameAvailableListener { 73 FrameQueuedListener(Layer* layer) : mLayer(layer) { } 74 private: 75 wp<Layer> mLayer; 76 virtual void onFrameAvailable() { 77 sp<Layer> that(mLayer.promote()); 78 if (that != 0) { 79 that->onFrameQueued(); 80 } 81 } 82 }; 83 mSurfaceTexture = new SurfaceTextureLayer(mTextureName, this); 84 mSurfaceTexture->setFrameAvailableListener(new FrameQueuedListener(this)); 85 mSurfaceTexture->setSynchronousMode(true); 86 mSurfaceTexture->setBufferCountServer(2); 87} 88 89Layer::~Layer() 90{ 91 class MessageDestroyGLState : public MessageBase { 92 GLuint texture; 93 public: 94 MessageDestroyGLState(GLuint texture) : texture(texture) { } 95 virtual bool handler() { 96 glDeleteTextures(1, &texture); 97 return true; 98 } 99 }; 100 mFlinger->postMessageAsync( new MessageDestroyGLState(mTextureName) ); 101} 102 103void Layer::onFrameQueued() { 104 android_atomic_inc(&mQueuedFrames); 105 mFlinger->signalEvent(); 106} 107 108// called with SurfaceFlinger::mStateLock as soon as the layer is entered 109// in the purgatory list 110void Layer::onRemoved() 111{ 112 mSurfaceTexture->abandon(); 113} 114 115void Layer::setName(const String8& name) { 116 LayerBase::setName(name); 117 mSurfaceTexture->setName(name); 118} 119 120sp<ISurface> Layer::createSurface() 121{ 122 class BSurface : public BnSurface, public LayerCleaner { 123 wp<const Layer> mOwner; 124 virtual sp<ISurfaceTexture> getSurfaceTexture() const { 125 sp<ISurfaceTexture> res; 126 sp<const Layer> that( mOwner.promote() ); 127 if (that != NULL) { 128 res = that->mSurfaceTexture; 129 } 130 return res; 131 } 132 public: 133 BSurface(const sp<SurfaceFlinger>& flinger, 134 const sp<Layer>& layer) 135 : LayerCleaner(flinger, layer), mOwner(layer) { } 136 }; 137 sp<ISurface> sur(new BSurface(mFlinger, this)); 138 return sur; 139} 140 141wp<IBinder> Layer::getSurfaceTextureBinder() const 142{ 143 return mSurfaceTexture->asBinder(); 144} 145 146status_t Layer::setBuffers( uint32_t w, uint32_t h, 147 PixelFormat format, uint32_t flags) 148{ 149 // this surfaces pixel format 150 PixelFormatInfo info; 151 status_t err = getPixelFormatInfo(format, &info); 152 if (err) return err; 153 154 // the display's pixel format 155 const DisplayHardware& hw(graphicPlane(0).displayHardware()); 156 uint32_t const maxSurfaceDims = min( 157 hw.getMaxTextureSize(), hw.getMaxViewportDims()); 158 159 // never allow a surface larger than what our underlying GL implementation 160 // can handle. 161 if ((uint32_t(w)>maxSurfaceDims) || (uint32_t(h)>maxSurfaceDims)) { 162 return BAD_VALUE; 163 } 164 165 PixelFormatInfo displayInfo; 166 getPixelFormatInfo(hw.getFormat(), &displayInfo); 167 const uint32_t hwFlags = hw.getFlags(); 168 169 mFormat = format; 170 171 mSecure = (flags & ISurfaceComposer::eSecure) ? true : false; 172 mProtectedByApp = (flags & ISurfaceComposer::eProtectedByApp) ? true : false; 173 mOpaqueLayer = (flags & ISurfaceComposer::eOpaque); 174 mCurrentOpacity = getOpacityForFormat(format); 175 176 mSurfaceTexture->setDefaultBufferSize(w, h); 177 mSurfaceTexture->setDefaultBufferFormat(format); 178 179 // we use the red index 180 int displayRedSize = displayInfo.getSize(PixelFormatInfo::INDEX_RED); 181 int layerRedsize = info.getSize(PixelFormatInfo::INDEX_RED); 182 mNeedsDithering = layerRedsize > displayRedSize; 183 184 return NO_ERROR; 185} 186 187void Layer::setGeometry(hwc_layer_t* hwcl) 188{ 189 LayerBaseClient::setGeometry(hwcl); 190 191 hwcl->flags &= ~HWC_SKIP_LAYER; 192 193 // we can't do alpha-fade with the hwc HAL 194 const State& s(drawingState()); 195 if (s.alpha < 0xFF) { 196 hwcl->flags = HWC_SKIP_LAYER; 197 } 198 199 /* 200 * Transformations are applied in this order: 201 * 1) buffer orientation/flip/mirror 202 * 2) state transformation (window manager) 203 * 3) layer orientation (screen orientation) 204 * mTransform is already the composition of (2) and (3) 205 * (NOTE: the matrices are multiplied in reverse order) 206 */ 207 208 const Transform bufferOrientation(mCurrentTransform); 209 const Transform tr(mTransform * bufferOrientation); 210 211 // this gives us only the "orientation" component of the transform 212 const uint32_t finalTransform = tr.getOrientation(); 213 214 // we can only handle simple transformation 215 if (finalTransform & Transform::ROT_INVALID) { 216 hwcl->flags = HWC_SKIP_LAYER; 217 } else { 218 hwcl->transform = finalTransform; 219 } 220 221 if (isCropped()) { 222 hwcl->sourceCrop.left = mCurrentCrop.left; 223 hwcl->sourceCrop.top = mCurrentCrop.top; 224 hwcl->sourceCrop.right = mCurrentCrop.right; 225 hwcl->sourceCrop.bottom = mCurrentCrop.bottom; 226 } else { 227 const sp<GraphicBuffer>& buffer(mActiveBuffer); 228 hwcl->sourceCrop.left = 0; 229 hwcl->sourceCrop.top = 0; 230 if (buffer != NULL) { 231 hwcl->sourceCrop.right = buffer->width; 232 hwcl->sourceCrop.bottom = buffer->height; 233 } else { 234 hwcl->sourceCrop.right = mTransformedBounds.width(); 235 hwcl->sourceCrop.bottom = mTransformedBounds.height(); 236 } 237 } 238} 239 240void Layer::setPerFrameData(hwc_layer_t* hwcl) { 241 const sp<GraphicBuffer>& buffer(mActiveBuffer); 242 if (buffer == NULL) { 243 // this can happen if the client never drew into this layer yet, 244 // or if we ran out of memory. In that case, don't let 245 // HWC handle it. 246 hwcl->flags |= HWC_SKIP_LAYER; 247 hwcl->handle = NULL; 248 } else { 249 hwcl->handle = buffer->handle; 250 } 251} 252 253void Layer::onDraw(const Region& clip) const 254{ 255 if (CC_UNLIKELY(mActiveBuffer == 0)) { 256 // the texture has not been created yet, this Layer has 257 // in fact never been drawn into. This happens frequently with 258 // SurfaceView because the WindowManager can't know when the client 259 // has drawn the first time. 260 261 // If there is nothing under us, we paint the screen in black, otherwise 262 // we just skip this update. 263 264 // figure out if there is something below us 265 Region under; 266 const SurfaceFlinger::LayerVector& drawingLayers( 267 mFlinger->mDrawingState.layersSortedByZ); 268 const size_t count = drawingLayers.size(); 269 for (size_t i=0 ; i<count ; ++i) { 270 const sp<LayerBase>& layer(drawingLayers[i]); 271 if (layer.get() == static_cast<LayerBase const*>(this)) 272 break; 273 under.orSelf(layer->visibleRegionScreen); 274 } 275 // if not everything below us is covered, we plug the holes! 276 Region holes(clip.subtract(under)); 277 if (!holes.isEmpty()) { 278 clearWithOpenGL(holes, 0, 0, 0, 1); 279 } 280 return; 281 } 282 283 GLenum target = GL_TEXTURE_EXTERNAL_OES; 284 if (!isProtected()) { 285 glBindTexture(target, mTextureName); 286 if (getFiltering() || needsFiltering() || isFixedSize() || isCropped()) { 287 // TODO: we could be more subtle with isFixedSize() 288 glTexParameterx(target, GL_TEXTURE_MAG_FILTER, GL_LINEAR); 289 glTexParameterx(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR); 290 } else { 291 glTexParameterx(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST); 292 glTexParameterx(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 293 } 294 glEnable(target); 295 glMatrixMode(GL_TEXTURE); 296 glLoadMatrixf(mTextureMatrix); 297 glMatrixMode(GL_MODELVIEW); 298 } else { 299 target = GL_TEXTURE_2D; 300 glBindTexture(target, mFlinger->getProtectedTexName()); 301 glEnable(target); 302 glMatrixMode(GL_TEXTURE); 303 glLoadIdentity(); 304 glMatrixMode(GL_MODELVIEW); 305 } 306 307 drawWithOpenGL(clip); 308 309 glDisable(target); 310} 311 312// As documented in libhardware header, formats in the range 313// 0x100 - 0x1FF are specific to the HAL implementation, and 314// are known to have no alpha channel 315// TODO: move definition for device-specific range into 316// hardware.h, instead of using hard-coded values here. 317#define HARDWARE_IS_DEVICE_FORMAT(f) ((f) >= 0x100 && (f) <= 0x1FF) 318 319bool Layer::getOpacityForFormat(uint32_t format) 320{ 321 if (HARDWARE_IS_DEVICE_FORMAT(format)) { 322 return true; 323 } 324 PixelFormatInfo info; 325 status_t err = getPixelFormatInfo(PixelFormat(format), &info); 326 // in case of error (unknown format), we assume no blending 327 return (err || info.h_alpha <= info.l_alpha); 328} 329 330 331bool Layer::isOpaque() const 332{ 333 // if we don't have a buffer yet, we're translucent regardless of the 334 // layer's opaque flag. 335 if (mActiveBuffer == 0) { 336 return false; 337 } 338 339 // if the layer has the opaque flag, then we're always opaque, 340 // otherwise we use the current buffer's format. 341 return mOpaqueLayer || mCurrentOpacity; 342} 343 344bool Layer::isProtected() const 345{ 346 const sp<GraphicBuffer>& activeBuffer(mActiveBuffer); 347 return (activeBuffer != 0) && 348 (activeBuffer->getUsage() & GRALLOC_USAGE_PROTECTED); 349} 350 351uint32_t Layer::doTransaction(uint32_t flags) 352{ 353 const Layer::State& front(drawingState()); 354 const Layer::State& temp(currentState()); 355 356 const bool sizeChanged = (front.requested_w != temp.requested_w) || 357 (front.requested_h != temp.requested_h); 358 359 if (sizeChanged) { 360 // the size changed, we need to ask our client to request a new buffer 361 LOGD_IF(DEBUG_RESIZE, 362 "doTransaction: " 363 "resize (layer=%p), requested (%dx%d), drawing (%d,%d), " 364 "scalingMode=%d", 365 this, 366 int(temp.requested_w), int(temp.requested_h), 367 int(front.requested_w), int(front.requested_h), 368 mCurrentScalingMode); 369 370 if (!isFixedSize()) { 371 // we're being resized and there is a freeze display request, 372 // acquire a freeze lock, so that the screen stays put 373 // until we've redrawn at the new size; this is to avoid 374 // glitches upon orientation changes. 375 if (mFlinger->hasFreezeRequest()) { 376 // if the surface is hidden, don't try to acquire the 377 // freeze lock, since hidden surfaces may never redraw 378 if (!(front.flags & ISurfaceComposer::eLayerHidden)) { 379 mFreezeLock = mFlinger->getFreezeLock(); 380 } 381 } 382 383 // this will make sure LayerBase::doTransaction doesn't update 384 // the drawing state's size 385 Layer::State& editDraw(mDrawingState); 386 editDraw.requested_w = temp.requested_w; 387 editDraw.requested_h = temp.requested_h; 388 } 389 390 // record the new size, form this point on, when the client request 391 // a buffer, it'll get the new size. 392 mSurfaceTexture->setDefaultBufferSize(temp.requested_w, 393 temp.requested_h); 394 } 395 396 if (temp.sequence != front.sequence) { 397 if (temp.flags & ISurfaceComposer::eLayerHidden || temp.alpha == 0) { 398 // this surface is now hidden, so it shouldn't hold a freeze lock 399 // (it may never redraw, which is fine if it is hidden) 400 mFreezeLock.clear(); 401 } 402 } 403 404 return LayerBase::doTransaction(flags); 405} 406 407bool Layer::isFixedSize() const { 408 return mCurrentScalingMode != NATIVE_WINDOW_SCALING_MODE_FREEZE; 409} 410 411bool Layer::isCropped() const { 412 return !mCurrentCrop.isEmpty(); 413} 414 415// ---------------------------------------------------------------------------- 416// pageflip handling... 417// ---------------------------------------------------------------------------- 418 419void Layer::lockPageFlip(bool& recomputeVisibleRegions) 420{ 421 if (mQueuedFrames > 0) { 422 // Capture the old state of the layer for comparisons later 423 const bool oldOpacity = isOpaque(); 424 sp<GraphicBuffer> oldActiveBuffer = mActiveBuffer; 425 426 // signal another event if we have more frames pending 427 if (android_atomic_dec(&mQueuedFrames) > 1) { 428 mFlinger->signalEvent(); 429 } 430 431 if (mSurfaceTexture->updateTexImage() < NO_ERROR) { 432 // something happened! 433 recomputeVisibleRegions = true; 434 return; 435 } 436 437 // update the active buffer 438 mActiveBuffer = mSurfaceTexture->getCurrentBuffer(); 439 440 const Rect crop(mSurfaceTexture->getCurrentCrop()); 441 const uint32_t transform(mSurfaceTexture->getCurrentTransform()); 442 const uint32_t scalingMode(mSurfaceTexture->getCurrentScalingMode()); 443 if ((crop != mCurrentCrop) || 444 (transform != mCurrentTransform) || 445 (scalingMode != mCurrentScalingMode)) 446 { 447 mCurrentCrop = crop; 448 mCurrentTransform = transform; 449 mCurrentScalingMode = scalingMode; 450 mFlinger->invalidateHwcGeometry(); 451 } 452 453 GLfloat textureMatrix[16]; 454 mSurfaceTexture->getTransformMatrix(textureMatrix); 455 if (memcmp(textureMatrix, mTextureMatrix, sizeof(textureMatrix))) { 456 memcpy(mTextureMatrix, textureMatrix, sizeof(textureMatrix)); 457 mFlinger->invalidateHwcGeometry(); 458 } 459 460 uint32_t bufWidth = mActiveBuffer->getWidth(); 461 uint32_t bufHeight = mActiveBuffer->getHeight(); 462 if (oldActiveBuffer != NULL) { 463 if (bufWidth != uint32_t(oldActiveBuffer->width) || 464 bufHeight != uint32_t(oldActiveBuffer->height)) { 465 mFlinger->invalidateHwcGeometry(); 466 } 467 } 468 469 mCurrentOpacity = getOpacityForFormat(mActiveBuffer->format); 470 if (oldOpacity != isOpaque()) { 471 recomputeVisibleRegions = true; 472 } 473 474 glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 475 glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 476 477 // update the layer size and release freeze-lock 478 const Layer::State& front(drawingState()); 479 480 // FIXME: mPostedDirtyRegion = dirty & bounds 481 mPostedDirtyRegion.set(front.w, front.h); 482 483 if ((front.w != front.requested_w) || 484 (front.h != front.requested_h)) 485 { 486 // check that we received a buffer of the right size 487 // (Take the buffer's orientation into account) 488 if (mCurrentTransform & Transform::ROT_90) { 489 swap(bufWidth, bufHeight); 490 } 491 492 if (isFixedSize() || 493 (bufWidth == front.requested_w && 494 bufHeight == front.requested_h)) 495 { 496 // Here we pretend the transaction happened by updating the 497 // current and drawing states. Drawing state is only accessed 498 // in this thread, no need to have it locked 499 Layer::State& editDraw(mDrawingState); 500 editDraw.w = editDraw.requested_w; 501 editDraw.h = editDraw.requested_h; 502 503 // We also need to update the current state so that we don't 504 // end-up doing too much work during the next transaction. 505 // NOTE: We actually don't need hold the transaction lock here 506 // because State::w and State::h are only accessed from 507 // this thread 508 Layer::State& editTemp(currentState()); 509 editTemp.w = editDraw.w; 510 editTemp.h = editDraw.h; 511 512 // recompute visible region 513 recomputeVisibleRegions = true; 514 515 // we now have the correct size, unfreeze the screen 516 mFreezeLock.clear(); 517 } 518 519 LOGD_IF(DEBUG_RESIZE, 520 "lockPageFlip : " 521 " (layer=%p), buffer (%ux%u, tr=%02x), " 522 "requested (%dx%d)", 523 this, 524 bufWidth, bufHeight, mCurrentTransform, 525 front.requested_w, front.requested_h); 526 } 527 } 528} 529 530void Layer::unlockPageFlip( 531 const Transform& planeTransform, Region& outDirtyRegion) 532{ 533 Region dirtyRegion(mPostedDirtyRegion); 534 if (!dirtyRegion.isEmpty()) { 535 mPostedDirtyRegion.clear(); 536 // The dirty region is given in the layer's coordinate space 537 // transform the dirty region by the surface's transformation 538 // and the global transformation. 539 const Layer::State& s(drawingState()); 540 const Transform tr(planeTransform * s.transform); 541 dirtyRegion = tr.transform(dirtyRegion); 542 543 // At this point, the dirty region is in screen space. 544 // Make sure it's constrained by the visible region (which 545 // is in screen space as well). 546 dirtyRegion.andSelf(visibleRegionScreen); 547 outDirtyRegion.orSelf(dirtyRegion); 548 } 549 if (visibleRegionScreen.isEmpty()) { 550 // an invisible layer should not hold a freeze-lock 551 // (because it may never be updated and therefore never release it) 552 mFreezeLock.clear(); 553 } 554} 555 556void Layer::dump(String8& result, char* buffer, size_t SIZE) const 557{ 558 LayerBaseClient::dump(result, buffer, SIZE); 559 560 sp<const GraphicBuffer> buf0(mActiveBuffer); 561 uint32_t w0=0, h0=0, s0=0, f0=0; 562 if (buf0 != 0) { 563 w0 = buf0->getWidth(); 564 h0 = buf0->getHeight(); 565 s0 = buf0->getStride(); 566 f0 = buf0->format; 567 } 568 snprintf(buffer, SIZE, 569 " " 570 "format=%2d, activeBuffer=[%4ux%4u:%4u,%3X]," 571 " freezeLock=%p, transform-hint=0x%02x, queued-frames=%d\n", 572 mFormat, w0, h0, s0,f0, 573 getFreezeLock().get(), getTransformHint(), mQueuedFrames); 574 575 result.append(buffer); 576 577 if (mSurfaceTexture != 0) { 578 mSurfaceTexture->dump(result, " ", buffer, SIZE); 579 } 580} 581 582uint32_t Layer::getEffectiveUsage(uint32_t usage) const 583{ 584 // TODO: should we do something special if mSecure is set? 585 if (mProtectedByApp) { 586 // need a hardware-protected path to external video sink 587 usage |= GraphicBuffer::USAGE_PROTECTED; 588 } 589 usage |= GraphicBuffer::USAGE_HW_COMPOSER; 590 return usage; 591} 592 593uint32_t Layer::getTransformHint() const { 594 uint32_t orientation = 0; 595 if (!mFlinger->mDebugDisableTransformHint) { 596 orientation = getPlaneOrientation(); 597 if (orientation & Transform::ROT_INVALID) { 598 orientation = 0; 599 } 600 } 601 return orientation; 602} 603 604// --------------------------------------------------------------------------- 605 606 607}; // namespace android 608