Layer.cpp revision ddc31c3e2bc6ffe66695c385d23e8ccc3c6dad06
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 47template <typename T> inline T min(T a, T b) { 48 return a<b ? a : b; 49} 50 51// --------------------------------------------------------------------------- 52 53Layer::Layer(SurfaceFlinger* flinger, 54 DisplayID display, const sp<Client>& client) 55 : LayerBaseClient(flinger, display, client), 56 mTextureName(-1U), 57 mQueuedFrames(0), 58 mCurrentTransform(0), 59 mCurrentOpacity(true), 60 mFormat(PIXEL_FORMAT_NONE), 61 mGLExtensions(GLExtensions::getInstance()), 62 mOpaqueLayer(true), 63 mNeedsDithering(false), 64 mSecure(false), 65 mProtectedByApp(false), 66 mFixedSize(false) 67{ 68 mCurrentCrop.makeInvalid(); 69 glGenTextures(1, &mTextureName); 70} 71 72void Layer::destroy(RefBase const* base) { 73 mFlinger->destroyLayer(static_cast<LayerBase const*>(base)); 74} 75 76void Layer::onFirstRef() 77{ 78 LayerBaseClient::onFirstRef(); 79 setDestroyer(this); 80 81 struct FrameQueuedListener : public SurfaceTexture::FrameAvailableListener { 82 FrameQueuedListener(Layer* layer) : mLayer(layer) { } 83 private: 84 wp<Layer> mLayer; 85 virtual void onFrameAvailable() { 86 sp<Layer> that(mLayer.promote()); 87 if (that != 0) { 88 that->onFrameQueued(); 89 } 90 } 91 }; 92 mSurfaceTexture = new SurfaceTextureLayer(mTextureName, this); 93 mSurfaceTexture->setFrameAvailableListener(new FrameQueuedListener(this)); 94 mSurfaceTexture->setSynchronousMode(true); 95 mSurfaceTexture->setBufferCountServer(2); 96} 97 98Layer::~Layer() 99{ 100 glDeleteTextures(1, &mTextureName); 101} 102 103void Layer::onFrameQueued() { 104 if (android_atomic_or(1, &mQueuedFrames) == 0) { 105 mFlinger->signalEvent(); 106 } 107} 108 109// called with SurfaceFlinger::mStateLock as soon as the layer is entered 110// in the purgatory list 111void Layer::onRemoved() 112{ 113} 114 115sp<ISurface> Layer::createSurface() 116{ 117 class BSurface : public BnSurface, public LayerCleaner { 118 wp<const Layer> mOwner; 119 virtual sp<ISurfaceTexture> getSurfaceTexture() const { 120 sp<ISurfaceTexture> res; 121 sp<const Layer> that( mOwner.promote() ); 122 if (that != NULL) { 123 res = that->mSurfaceTexture; 124 } 125 return res; 126 } 127 public: 128 BSurface(const sp<SurfaceFlinger>& flinger, 129 const sp<Layer>& layer) 130 : LayerCleaner(flinger, layer), mOwner(layer) { } 131 }; 132 sp<ISurface> sur(new BSurface(mFlinger, this)); 133 return sur; 134} 135 136status_t Layer::setBuffers( uint32_t w, uint32_t h, 137 PixelFormat format, uint32_t flags) 138{ 139 // this surfaces pixel format 140 PixelFormatInfo info; 141 status_t err = getPixelFormatInfo(format, &info); 142 if (err) return err; 143 144 // the display's pixel format 145 const DisplayHardware& hw(graphicPlane(0).displayHardware()); 146 uint32_t const maxSurfaceDims = min( 147 hw.getMaxTextureSize(), hw.getMaxViewportDims()); 148 149 // never allow a surface larger than what our underlying GL implementation 150 // can handle. 151 if ((uint32_t(w)>maxSurfaceDims) || (uint32_t(h)>maxSurfaceDims)) { 152 return BAD_VALUE; 153 } 154 155 PixelFormatInfo displayInfo; 156 getPixelFormatInfo(hw.getFormat(), &displayInfo); 157 const uint32_t hwFlags = hw.getFlags(); 158 159 mFormat = format; 160 161 mSecure = (flags & ISurfaceComposer::eSecure) ? true : false; 162 mProtectedByApp = (flags & ISurfaceComposer::eProtectedByApp) ? true : false; 163 mOpaqueLayer = (flags & ISurfaceComposer::eOpaque); 164 mCurrentOpacity = getOpacityForFormat(format); 165 166 mSurfaceTexture->setDefaultBufferSize(w, h); 167 mSurfaceTexture->setDefaultBufferFormat(format); 168 169 // we use the red index 170 int displayRedSize = displayInfo.getSize(PixelFormatInfo::INDEX_RED); 171 int layerRedsize = info.getSize(PixelFormatInfo::INDEX_RED); 172 mNeedsDithering = layerRedsize > displayRedSize; 173 174 return NO_ERROR; 175} 176 177void Layer::setGeometry(hwc_layer_t* hwcl) 178{ 179 hwcl->compositionType = HWC_FRAMEBUFFER; 180 hwcl->hints = 0; 181 hwcl->flags = 0; 182 hwcl->transform = 0; 183 hwcl->blending = HWC_BLENDING_NONE; 184 185 // we can't do alpha-fade with the hwc HAL 186 const State& s(drawingState()); 187 if (s.alpha < 0xFF) { 188 hwcl->flags = HWC_SKIP_LAYER; 189 return; 190 } 191 192 // we can only handle simple transformation 193 if (mOrientation & Transform::ROT_INVALID) { 194 hwcl->flags = HWC_SKIP_LAYER; 195 return; 196 } 197 198 // FIXME: shouldn't we take the state's transform into account here? 199 200 Transform tr(Transform(mOrientation) * Transform(mCurrentTransform)); 201 hwcl->transform = tr.getOrientation(); 202 203 if (!isOpaque()) { 204 hwcl->blending = mPremultipliedAlpha ? 205 HWC_BLENDING_PREMULT : HWC_BLENDING_COVERAGE; 206 } 207 208 hwcl->displayFrame.left = mTransformedBounds.left; 209 hwcl->displayFrame.top = mTransformedBounds.top; 210 hwcl->displayFrame.right = mTransformedBounds.right; 211 hwcl->displayFrame.bottom = mTransformedBounds.bottom; 212 213 hwcl->visibleRegionScreen.rects = 214 reinterpret_cast<hwc_rect_t const *>( 215 visibleRegionScreen.getArray( 216 &hwcl->visibleRegionScreen.numRects)); 217} 218 219void Layer::setPerFrameData(hwc_layer_t* hwcl) { 220 const sp<GraphicBuffer>& buffer(mActiveBuffer); 221 if (buffer == NULL) { 222 // this can happen if the client never drew into this layer yet, 223 // or if we ran out of memory. In that case, don't let 224 // HWC handle it. 225 hwcl->flags |= HWC_SKIP_LAYER; 226 hwcl->handle = NULL; 227 return; 228 } 229 hwcl->handle = buffer->handle; 230 231 if (isCropped()) { 232 hwcl->sourceCrop.left = mCurrentCrop.left; 233 hwcl->sourceCrop.top = mCurrentCrop.top; 234 hwcl->sourceCrop.right = mCurrentCrop.right; 235 hwcl->sourceCrop.bottom = mCurrentCrop.bottom; 236 } else { 237 hwcl->sourceCrop.left = 0; 238 hwcl->sourceCrop.top = 0; 239 hwcl->sourceCrop.right = buffer->width; 240 hwcl->sourceCrop.bottom = buffer->height; 241 } 242} 243 244static inline uint16_t pack565(int r, int g, int b) { 245 return (r<<11)|(g<<5)|b; 246} 247void Layer::onDraw(const Region& clip) const 248{ 249 if (CC_UNLIKELY(mActiveBuffer == 0)) { 250 // the texture has not been created yet, this Layer has 251 // in fact never been drawn into. This happens frequently with 252 // SurfaceView because the WindowManager can't know when the client 253 // has drawn the first time. 254 255 // If there is nothing under us, we paint the screen in black, otherwise 256 // we just skip this update. 257 258 // figure out if there is something below us 259 Region under; 260 const SurfaceFlinger::LayerVector& drawingLayers(mFlinger->mDrawingState.layersSortedByZ); 261 const size_t count = drawingLayers.size(); 262 for (size_t i=0 ; i<count ; ++i) { 263 const sp<LayerBase>& layer(drawingLayers[i]); 264 if (layer.get() == static_cast<LayerBase const*>(this)) 265 break; 266 under.orSelf(layer->visibleRegionScreen); 267 } 268 // if not everything below us is covered, we plug the holes! 269 Region holes(clip.subtract(under)); 270 if (!holes.isEmpty()) { 271 clearWithOpenGL(holes, 0, 0, 0, 1); 272 } 273 return; 274 } 275 276 GLenum target = mSurfaceTexture->getCurrentTextureTarget(); 277 glBindTexture(target, mTextureName); 278 if (getFiltering() || needsFiltering() || isFixedSize() || isCropped()) { 279 // TODO: we could be more subtle with isFixedSize() 280 glTexParameterx(target, GL_TEXTURE_MAG_FILTER, GL_LINEAR); 281 glTexParameterx(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR); 282 } else { 283 glTexParameterx(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST); 284 glTexParameterx(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 285 } 286 glEnable(target); 287 glMatrixMode(GL_TEXTURE); 288 glLoadMatrixf(mTextureMatrix); 289 glMatrixMode(GL_MODELVIEW); 290 291 drawWithOpenGL(clip); 292 293 glDisable(target); 294} 295 296// As documented in libhardware header, formats in the range 297// 0x100 - 0x1FF are specific to the HAL implementation, and 298// are known to have no alpha channel 299// TODO: move definition for device-specific range into 300// hardware.h, instead of using hard-coded values here. 301#define HARDWARE_IS_DEVICE_FORMAT(f) ((f) >= 0x100 && (f) <= 0x1FF) 302 303bool Layer::getOpacityForFormat(uint32_t format) 304{ 305 if (HARDWARE_IS_DEVICE_FORMAT(format)) { 306 return true; 307 } 308 PixelFormatInfo info; 309 status_t err = getPixelFormatInfo(PixelFormat(format), &info); 310 // in case of error (unknown format), we assume no blending 311 return (err || info.h_alpha <= info.l_alpha); 312} 313 314 315bool Layer::isOpaque() const 316{ 317 // if we don't have a buffer yet, we're translucent regardless of the 318 // layer's opaque flag. 319 if (mActiveBuffer == 0) 320 return false; 321 322 // if the layer has the opaque flag, then we're always opaque, 323 // otherwise we use the current buffer's format. 324 return mOpaqueLayer || mCurrentOpacity; 325} 326 327bool Layer::isProtected() const 328{ 329 const sp<GraphicBuffer>& activeBuffer(mActiveBuffer); 330 return (activeBuffer != 0) && 331 (activeBuffer->getUsage() & GRALLOC_USAGE_PROTECTED); 332} 333 334uint32_t Layer::doTransaction(uint32_t flags) 335{ 336 const Layer::State& front(drawingState()); 337 const Layer::State& temp(currentState()); 338 339 const bool sizeChanged = (front.requested_w != temp.requested_w) || 340 (front.requested_h != temp.requested_h); 341 342 if (sizeChanged) { 343 // the size changed, we need to ask our client to request a new buffer 344 LOGD_IF(DEBUG_RESIZE, 345 "resize (layer=%p), requested (%dx%d), drawing (%d,%d), " 346 "fixedSize=%d", 347 this, 348 int(temp.requested_w), int(temp.requested_h), 349 int(front.requested_w), int(front.requested_h), 350 isFixedSize()); 351 352 if (!isFixedSize()) { 353 // we're being resized and there is a freeze display request, 354 // acquire a freeze lock, so that the screen stays put 355 // until we've redrawn at the new size; this is to avoid 356 // glitches upon orientation changes. 357 if (mFlinger->hasFreezeRequest()) { 358 // if the surface is hidden, don't try to acquire the 359 // freeze lock, since hidden surfaces may never redraw 360 if (!(front.flags & ISurfaceComposer::eLayerHidden)) { 361 mFreezeLock = mFlinger->getFreezeLock(); 362 } 363 } 364 365 // this will make sure LayerBase::doTransaction doesn't update 366 // the drawing state's size 367 Layer::State& editDraw(mDrawingState); 368 editDraw.requested_w = temp.requested_w; 369 editDraw.requested_h = temp.requested_h; 370 371 // record the new size, form this point on, when the client request 372 // a buffer, it'll get the new size. 373 mSurfaceTexture->setDefaultBufferSize(temp.requested_w, temp.requested_h); 374 } 375 } 376 377 if (temp.sequence != front.sequence) { 378 if (temp.flags & ISurfaceComposer::eLayerHidden || temp.alpha == 0) { 379 // this surface is now hidden, so it shouldn't hold a freeze lock 380 // (it may never redraw, which is fine if it is hidden) 381 mFreezeLock.clear(); 382 } 383 } 384 385 return LayerBase::doTransaction(flags); 386} 387 388bool Layer::isFixedSize() const { 389 Mutex::Autolock _l(mLock); 390 return mFixedSize; 391} 392 393void Layer::setFixedSize(bool fixedSize) 394{ 395 Mutex::Autolock _l(mLock); 396 mFixedSize = fixedSize; 397} 398 399bool Layer::isCropped() const { 400 return !mCurrentCrop.isEmpty(); 401} 402 403// ---------------------------------------------------------------------------- 404// pageflip handling... 405// ---------------------------------------------------------------------------- 406 407void Layer::lockPageFlip(bool& recomputeVisibleRegions) 408{ 409 if (android_atomic_and(0, &mQueuedFrames)) { 410 if (mSurfaceTexture->updateTexImage() < NO_ERROR) { 411 // something happened! 412 recomputeVisibleRegions = true; 413 return; 414 } 415 416 // signal another event if we have more frames waiting 417 if (mSurfaceTexture->getQueuedCount()) { 418 if (android_atomic_or(1, &mQueuedFrames) == 0) { 419 mFlinger->signalEvent(); 420 } 421 } 422 423 mActiveBuffer = mSurfaceTexture->getCurrentBuffer(); 424 mSurfaceTexture->getTransformMatrix(mTextureMatrix); 425 426 const Rect crop(mSurfaceTexture->getCurrentCrop()); 427 const uint32_t transform(mSurfaceTexture->getCurrentTransform()); 428 if ((crop != mCurrentCrop) || (transform != mCurrentTransform)) { 429 mCurrentCrop = crop; 430 mCurrentTransform = transform; 431 mFlinger->invalidateHwcGeometry(); 432 } 433 434 const bool opacity(getOpacityForFormat(mActiveBuffer->format)); 435 if (opacity != mCurrentOpacity) { 436 mCurrentOpacity = opacity; 437 recomputeVisibleRegions = true; 438 } 439 440 const GLenum target(mSurfaceTexture->getCurrentTextureTarget()); 441 glTexParameterx(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 442 glTexParameterx(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 443 444 // update the layer size and release freeze-lock 445 const Layer::State& front(drawingState()); 446 447 // FIXME: mPostedDirtyRegion = dirty & bounds 448 mPostedDirtyRegion.set(front.w, front.h); 449 450 sp<GraphicBuffer> newFrontBuffer(mActiveBuffer); 451 if ((newFrontBuffer->getWidth() == front.requested_w && 452 newFrontBuffer->getHeight() == front.requested_h) || 453 isFixedSize()) 454 { 455 if ((front.w != front.requested_w) || 456 (front.h != front.requested_h)) 457 { 458 // Here we pretend the transaction happened by updating the 459 // current and drawing states. Drawing state is only accessed 460 // in this thread, no need to have it locked 461 Layer::State& editDraw(mDrawingState); 462 editDraw.w = editDraw.requested_w; 463 editDraw.h = editDraw.requested_h; 464 465 // We also need to update the current state so that we don't 466 // end-up doing too much work during the next transaction. 467 // NOTE: We actually don't need hold the transaction lock here 468 // because State::w and State::h are only accessed from 469 // this thread 470 Layer::State& editTemp(currentState()); 471 editTemp.w = editDraw.w; 472 editTemp.h = editDraw.h; 473 474 // recompute visible region 475 recomputeVisibleRegions = true; 476 } 477 478 // we now have the correct size, unfreeze the screen 479 mFreezeLock.clear(); 480 } 481 } 482} 483 484void Layer::unlockPageFlip( 485 const Transform& planeTransform, Region& outDirtyRegion) 486{ 487 Region dirtyRegion(mPostedDirtyRegion); 488 if (!dirtyRegion.isEmpty()) { 489 mPostedDirtyRegion.clear(); 490 // The dirty region is given in the layer's coordinate space 491 // transform the dirty region by the surface's transformation 492 // and the global transformation. 493 const Layer::State& s(drawingState()); 494 const Transform tr(planeTransform * s.transform); 495 dirtyRegion = tr.transform(dirtyRegion); 496 497 // At this point, the dirty region is in screen space. 498 // Make sure it's constrained by the visible region (which 499 // is in screen space as well). 500 dirtyRegion.andSelf(visibleRegionScreen); 501 outDirtyRegion.orSelf(dirtyRegion); 502 } 503 if (visibleRegionScreen.isEmpty()) { 504 // an invisible layer should not hold a freeze-lock 505 // (because it may never be updated and therefore never release it) 506 mFreezeLock.clear(); 507 } 508} 509 510void Layer::dump(String8& result, char* buffer, size_t SIZE) const 511{ 512 LayerBaseClient::dump(result, buffer, SIZE); 513 514 sp<const GraphicBuffer> buf0(mActiveBuffer); 515 uint32_t w0=0, h0=0, s0=0, f0=0; 516 if (buf0 != 0) { 517 w0 = buf0->getWidth(); 518 h0 = buf0->getHeight(); 519 s0 = buf0->getStride(); 520 f0 = buf0->format; 521 } 522 snprintf(buffer, SIZE, 523 " " 524 "format=%2d, activeBuffer=[%3ux%3u:%3u,%3u]," 525 " freezeLock=%p, queued-frames=%d\n", 526 mFormat, w0, h0, s0,f0, 527 getFreezeLock().get(), mQueuedFrames); 528 529 result.append(buffer); 530 531 if (mSurfaceTexture != 0) { 532 mSurfaceTexture->dump(result, " ", buffer, SIZE); 533 } 534} 535 536uint32_t Layer::getEffectiveUsage(uint32_t usage) const 537{ 538 // TODO: should we do something special if mSecure is set? 539 if (mProtectedByApp) { 540 // need a hardware-protected path to external video sink 541 usage |= GraphicBuffer::USAGE_PROTECTED; 542 } 543 return usage; 544} 545 546// --------------------------------------------------------------------------- 547 548 549}; // namespace android 550