Layer.cpp revision a249f2d11249ff37c48119020b797ad437ddef2c
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 const GLenum target = GL_TEXTURE_EXTERNAL_OES; 284 glBindTexture(target, mTextureName); 285 if (getFiltering() || needsFiltering() || isFixedSize() || isCropped()) { 286 // TODO: we could be more subtle with isFixedSize() 287 glTexParameterx(target, GL_TEXTURE_MAG_FILTER, GL_LINEAR); 288 glTexParameterx(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR); 289 } else { 290 glTexParameterx(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST); 291 glTexParameterx(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 292 } 293 glEnable(target); 294 glMatrixMode(GL_TEXTURE); 295 glLoadMatrixf(mTextureMatrix); 296 glMatrixMode(GL_MODELVIEW); 297 298 drawWithOpenGL(clip); 299 300 glDisable(target); 301} 302 303// As documented in libhardware header, formats in the range 304// 0x100 - 0x1FF are specific to the HAL implementation, and 305// are known to have no alpha channel 306// TODO: move definition for device-specific range into 307// hardware.h, instead of using hard-coded values here. 308#define HARDWARE_IS_DEVICE_FORMAT(f) ((f) >= 0x100 && (f) <= 0x1FF) 309 310bool Layer::getOpacityForFormat(uint32_t format) 311{ 312 if (HARDWARE_IS_DEVICE_FORMAT(format)) { 313 return true; 314 } 315 PixelFormatInfo info; 316 status_t err = getPixelFormatInfo(PixelFormat(format), &info); 317 // in case of error (unknown format), we assume no blending 318 return (err || info.h_alpha <= info.l_alpha); 319} 320 321 322bool Layer::isOpaque() const 323{ 324 // if we don't have a buffer yet, we're translucent regardless of the 325 // layer's opaque flag. 326 if (mActiveBuffer == 0) { 327 return false; 328 } 329 330 // if the layer has the opaque flag, then we're always opaque, 331 // otherwise we use the current buffer's format. 332 return mOpaqueLayer || mCurrentOpacity; 333} 334 335bool Layer::isProtected() const 336{ 337 const sp<GraphicBuffer>& activeBuffer(mActiveBuffer); 338 return (activeBuffer != 0) && 339 (activeBuffer->getUsage() & GRALLOC_USAGE_PROTECTED); 340} 341 342uint32_t Layer::doTransaction(uint32_t flags) 343{ 344 const Layer::State& front(drawingState()); 345 const Layer::State& temp(currentState()); 346 347 const bool sizeChanged = (front.requested_w != temp.requested_w) || 348 (front.requested_h != temp.requested_h); 349 350 if (sizeChanged) { 351 // the size changed, we need to ask our client to request a new buffer 352 LOGD_IF(DEBUG_RESIZE, 353 "doTransaction: " 354 "resize (layer=%p), requested (%dx%d), drawing (%d,%d), " 355 "scalingMode=%d", 356 this, 357 int(temp.requested_w), int(temp.requested_h), 358 int(front.requested_w), int(front.requested_h), 359 mCurrentScalingMode); 360 361 if (!isFixedSize()) { 362 // we're being resized and there is a freeze display request, 363 // acquire a freeze lock, so that the screen stays put 364 // until we've redrawn at the new size; this is to avoid 365 // glitches upon orientation changes. 366 if (mFlinger->hasFreezeRequest()) { 367 // if the surface is hidden, don't try to acquire the 368 // freeze lock, since hidden surfaces may never redraw 369 if (!(front.flags & ISurfaceComposer::eLayerHidden)) { 370 mFreezeLock = mFlinger->getFreezeLock(); 371 } 372 } 373 374 // this will make sure LayerBase::doTransaction doesn't update 375 // the drawing state's size 376 Layer::State& editDraw(mDrawingState); 377 editDraw.requested_w = temp.requested_w; 378 editDraw.requested_h = temp.requested_h; 379 380 // record the new size, form this point on, when the client request 381 // a buffer, it'll get the new size. 382 mSurfaceTexture->setDefaultBufferSize(temp.requested_w, temp.requested_h); 383 } 384 } 385 386 if (temp.sequence != front.sequence) { 387 if (temp.flags & ISurfaceComposer::eLayerHidden || temp.alpha == 0) { 388 // this surface is now hidden, so it shouldn't hold a freeze lock 389 // (it may never redraw, which is fine if it is hidden) 390 mFreezeLock.clear(); 391 } 392 } 393 394 return LayerBase::doTransaction(flags); 395} 396 397bool Layer::isFixedSize() const { 398 return mCurrentScalingMode != NATIVE_WINDOW_SCALING_MODE_FREEZE; 399} 400 401bool Layer::isCropped() const { 402 return !mCurrentCrop.isEmpty(); 403} 404 405// ---------------------------------------------------------------------------- 406// pageflip handling... 407// ---------------------------------------------------------------------------- 408 409void Layer::lockPageFlip(bool& recomputeVisibleRegions) 410{ 411 if (mQueuedFrames > 0) { 412 // Capture the old state of the layer for comparisons later 413 const bool oldOpacity = isOpaque(); 414 sp<GraphicBuffer> oldActiveBuffer = mActiveBuffer; 415 416 // signal another event if we have more frames pending 417 if (android_atomic_dec(&mQueuedFrames) > 1) { 418 mFlinger->signalEvent(); 419 } 420 421 if (mSurfaceTexture->updateTexImage() < NO_ERROR) { 422 // something happened! 423 recomputeVisibleRegions = true; 424 return; 425 } 426 427 // update the active buffer 428 mActiveBuffer = mSurfaceTexture->getCurrentBuffer(); 429 430 const Rect crop(mSurfaceTexture->getCurrentCrop()); 431 const uint32_t transform(mSurfaceTexture->getCurrentTransform()); 432 const uint32_t scalingMode(mSurfaceTexture->getCurrentScalingMode()); 433 if ((crop != mCurrentCrop) || 434 (transform != mCurrentTransform) || 435 (scalingMode != mCurrentScalingMode)) 436 { 437 mCurrentCrop = crop; 438 mCurrentTransform = transform; 439 mCurrentScalingMode = scalingMode; 440 mFlinger->invalidateHwcGeometry(); 441 } 442 443 GLfloat textureMatrix[16]; 444 mSurfaceTexture->getTransformMatrix(textureMatrix); 445 if (memcmp(textureMatrix, mTextureMatrix, sizeof(textureMatrix))) { 446 memcpy(mTextureMatrix, textureMatrix, sizeof(textureMatrix)); 447 mFlinger->invalidateHwcGeometry(); 448 } 449 450 uint32_t bufWidth = mActiveBuffer->getWidth(); 451 uint32_t bufHeight = mActiveBuffer->getHeight(); 452 if (oldActiveBuffer != NULL) { 453 if (bufWidth != uint32_t(oldActiveBuffer->width) || 454 bufHeight != uint32_t(oldActiveBuffer->height)) { 455 mFlinger->invalidateHwcGeometry(); 456 } 457 } 458 459 mCurrentOpacity = getOpacityForFormat(mActiveBuffer->format); 460 if (oldOpacity != isOpaque()) { 461 recomputeVisibleRegions = true; 462 } 463 464 glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 465 glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 466 467 // update the layer size and release freeze-lock 468 const Layer::State& front(drawingState()); 469 470 // FIXME: mPostedDirtyRegion = dirty & bounds 471 mPostedDirtyRegion.set(front.w, front.h); 472 473 if ((front.w != front.requested_w) || 474 (front.h != front.requested_h)) 475 { 476 // check that we received a buffer of the right size 477 // (Take the buffer's orientation into account) 478 if (mCurrentTransform & Transform::ROT_90) { 479 swap(bufWidth, bufHeight); 480 } 481 482 if (isFixedSize() || 483 (bufWidth == front.requested_w && 484 bufHeight == front.requested_h)) 485 { 486 // Here we pretend the transaction happened by updating the 487 // current and drawing states. Drawing state is only accessed 488 // in this thread, no need to have it locked 489 Layer::State& editDraw(mDrawingState); 490 editDraw.w = editDraw.requested_w; 491 editDraw.h = editDraw.requested_h; 492 493 // We also need to update the current state so that we don't 494 // end-up doing too much work during the next transaction. 495 // NOTE: We actually don't need hold the transaction lock here 496 // because State::w and State::h are only accessed from 497 // this thread 498 Layer::State& editTemp(currentState()); 499 editTemp.w = editDraw.w; 500 editTemp.h = editDraw.h; 501 502 // recompute visible region 503 recomputeVisibleRegions = true; 504 505 // we now have the correct size, unfreeze the screen 506 mFreezeLock.clear(); 507 } 508 509 LOGD_IF(DEBUG_RESIZE, 510 "lockPageFlip : " 511 " (layer=%p), buffer (%ux%u, tr=%02x), " 512 "requested (%dx%d)", 513 this, 514 bufWidth, bufHeight, mCurrentTransform, 515 front.requested_w, front.requested_h); 516 } 517 } 518} 519 520void Layer::unlockPageFlip( 521 const Transform& planeTransform, Region& outDirtyRegion) 522{ 523 Region dirtyRegion(mPostedDirtyRegion); 524 if (!dirtyRegion.isEmpty()) { 525 mPostedDirtyRegion.clear(); 526 // The dirty region is given in the layer's coordinate space 527 // transform the dirty region by the surface's transformation 528 // and the global transformation. 529 const Layer::State& s(drawingState()); 530 const Transform tr(planeTransform * s.transform); 531 dirtyRegion = tr.transform(dirtyRegion); 532 533 // At this point, the dirty region is in screen space. 534 // Make sure it's constrained by the visible region (which 535 // is in screen space as well). 536 dirtyRegion.andSelf(visibleRegionScreen); 537 outDirtyRegion.orSelf(dirtyRegion); 538 } 539 if (visibleRegionScreen.isEmpty()) { 540 // an invisible layer should not hold a freeze-lock 541 // (because it may never be updated and therefore never release it) 542 mFreezeLock.clear(); 543 } 544} 545 546void Layer::dump(String8& result, char* buffer, size_t SIZE) const 547{ 548 LayerBaseClient::dump(result, buffer, SIZE); 549 550 sp<const GraphicBuffer> buf0(mActiveBuffer); 551 uint32_t w0=0, h0=0, s0=0, f0=0; 552 if (buf0 != 0) { 553 w0 = buf0->getWidth(); 554 h0 = buf0->getHeight(); 555 s0 = buf0->getStride(); 556 f0 = buf0->format; 557 } 558 snprintf(buffer, SIZE, 559 " " 560 "format=%2d, activeBuffer=[%4ux%4u:%4u,%3X]," 561 " freezeLock=%p, transform-hint=0x%02x, queued-frames=%d\n", 562 mFormat, w0, h0, s0,f0, 563 getFreezeLock().get(), getTransformHint(), mQueuedFrames); 564 565 result.append(buffer); 566 567 if (mSurfaceTexture != 0) { 568 mSurfaceTexture->dump(result, " ", buffer, SIZE); 569 } 570} 571 572uint32_t Layer::getEffectiveUsage(uint32_t usage) const 573{ 574 // TODO: should we do something special if mSecure is set? 575 if (mProtectedByApp) { 576 // need a hardware-protected path to external video sink 577 usage |= GraphicBuffer::USAGE_PROTECTED; 578 } 579 usage |= GraphicBuffer::USAGE_HW_COMPOSER; 580 return usage; 581} 582 583uint32_t Layer::getTransformHint() const { 584 uint32_t orientation = 0; 585 if (!mFlinger->mDebugDisableTransformHint) { 586 orientation = getOrientation(); 587 if (orientation & Transform::ROT_INVALID) { 588 orientation = 0; 589 } 590 } 591 return orientation; 592} 593 594// --------------------------------------------------------------------------- 595 596 597}; // namespace android 598