Layer.cpp revision 582270d69db94286a248bd829f1ae6f910d45124
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 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 136wp<IBinder> Layer::getSurfaceTextureBinder() const 137{ 138 return mSurfaceTexture->asBinder(); 139} 140 141status_t Layer::setBuffers( uint32_t w, uint32_t h, 142 PixelFormat format, uint32_t flags) 143{ 144 // this surfaces pixel format 145 PixelFormatInfo info; 146 status_t err = getPixelFormatInfo(format, &info); 147 if (err) return err; 148 149 // the display's pixel format 150 const DisplayHardware& hw(graphicPlane(0).displayHardware()); 151 uint32_t const maxSurfaceDims = min( 152 hw.getMaxTextureSize(), hw.getMaxViewportDims()); 153 154 // never allow a surface larger than what our underlying GL implementation 155 // can handle. 156 if ((uint32_t(w)>maxSurfaceDims) || (uint32_t(h)>maxSurfaceDims)) { 157 return BAD_VALUE; 158 } 159 160 PixelFormatInfo displayInfo; 161 getPixelFormatInfo(hw.getFormat(), &displayInfo); 162 const uint32_t hwFlags = hw.getFlags(); 163 164 mFormat = format; 165 166 mSecure = (flags & ISurfaceComposer::eSecure) ? true : false; 167 mProtectedByApp = (flags & ISurfaceComposer::eProtectedByApp) ? true : false; 168 mOpaqueLayer = (flags & ISurfaceComposer::eOpaque); 169 mCurrentOpacity = getOpacityForFormat(format); 170 171 mSurfaceTexture->setDefaultBufferSize(w, h); 172 mSurfaceTexture->setDefaultBufferFormat(format); 173 174 // we use the red index 175 int displayRedSize = displayInfo.getSize(PixelFormatInfo::INDEX_RED); 176 int layerRedsize = info.getSize(PixelFormatInfo::INDEX_RED); 177 mNeedsDithering = layerRedsize > displayRedSize; 178 179 return NO_ERROR; 180} 181 182void Layer::setGeometry(hwc_layer_t* hwcl) 183{ 184 LayerBaseClient::setGeometry(hwcl); 185 186 hwcl->flags &= ~HWC_SKIP_LAYER; 187 188 // we can't do alpha-fade with the hwc HAL 189 const State& s(drawingState()); 190 if (s.alpha < 0xFF) { 191 hwcl->flags = HWC_SKIP_LAYER; 192 } 193 194 /* 195 * Transformations are applied in this order: 196 * 1) buffer orientation/flip/mirror 197 * 2) state transformation (window manager) 198 * 3) layer orientation (screen orientation) 199 * mOrientation is already the composition of (2) and (3) 200 * (NOTE: the matrices are multiplied in reverse order) 201 */ 202 203 const Transform bufferOrientation(mCurrentTransform); 204 const Transform layerOrientation(mOrientation); 205 const Transform tr(layerOrientation * bufferOrientation); 206 207 // this gives us only the "orientation" component of the transform 208 const uint32_t finalTransform = tr.getOrientation(); 209 210 // we can only handle simple transformation 211 if (finalTransform & Transform::ROT_INVALID) { 212 hwcl->flags = HWC_SKIP_LAYER; 213 } else { 214 hwcl->transform = finalTransform; 215 } 216} 217 218void Layer::setPerFrameData(hwc_layer_t* hwcl) { 219 const sp<GraphicBuffer>& buffer(mActiveBuffer); 220 if (buffer == NULL) { 221 // this can happen if the client never drew into this layer yet, 222 // or if we ran out of memory. In that case, don't let 223 // HWC handle it. 224 hwcl->flags |= HWC_SKIP_LAYER; 225 hwcl->handle = NULL; 226 } else { 227 hwcl->handle = buffer->handle; 228 } 229 230 if (isCropped()) { 231 hwcl->sourceCrop.left = mCurrentCrop.left; 232 hwcl->sourceCrop.top = mCurrentCrop.top; 233 hwcl->sourceCrop.right = mCurrentCrop.right; 234 hwcl->sourceCrop.bottom = mCurrentCrop.bottom; 235 } else { 236 hwcl->sourceCrop.left = 0; 237 hwcl->sourceCrop.top = 0; 238 if (buffer != NULL) { 239 hwcl->sourceCrop.right = buffer->width; 240 hwcl->sourceCrop.bottom = buffer->height; 241 } else { 242 hwcl->sourceCrop.right = mTransformedBounds.width(); 243 hwcl->sourceCrop.bottom = mTransformedBounds.height(); 244 } 245 } 246} 247 248static inline uint16_t pack565(int r, int g, int b) { 249 return (r<<11)|(g<<5)|b; 250} 251void Layer::onDraw(const Region& clip) const 252{ 253 if (CC_UNLIKELY(mActiveBuffer == 0)) { 254 // the texture has not been created yet, this Layer has 255 // in fact never been drawn into. This happens frequently with 256 // SurfaceView because the WindowManager can't know when the client 257 // has drawn the first time. 258 259 // If there is nothing under us, we paint the screen in black, otherwise 260 // we just skip this update. 261 262 // figure out if there is something below us 263 Region under; 264 const SurfaceFlinger::LayerVector& drawingLayers(mFlinger->mDrawingState.layersSortedByZ); 265 const size_t count = drawingLayers.size(); 266 for (size_t i=0 ; i<count ; ++i) { 267 const sp<LayerBase>& layer(drawingLayers[i]); 268 if (layer.get() == static_cast<LayerBase const*>(this)) 269 break; 270 under.orSelf(layer->visibleRegionScreen); 271 } 272 // if not everything below us is covered, we plug the holes! 273 Region holes(clip.subtract(under)); 274 if (!holes.isEmpty()) { 275 clearWithOpenGL(holes, 0, 0, 0, 1); 276 } 277 return; 278 } 279 280 GLenum target = mSurfaceTexture->getCurrentTextureTarget(); 281 glBindTexture(target, mTextureName); 282 if (getFiltering() || needsFiltering() || isFixedSize() || isCropped()) { 283 // TODO: we could be more subtle with isFixedSize() 284 glTexParameterx(target, GL_TEXTURE_MAG_FILTER, GL_LINEAR); 285 glTexParameterx(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR); 286 } else { 287 glTexParameterx(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST); 288 glTexParameterx(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 289 } 290 glEnable(target); 291 glMatrixMode(GL_TEXTURE); 292 glLoadMatrixf(mTextureMatrix); 293 glMatrixMode(GL_MODELVIEW); 294 295 drawWithOpenGL(clip); 296 297 glDisable(target); 298} 299 300// As documented in libhardware header, formats in the range 301// 0x100 - 0x1FF are specific to the HAL implementation, and 302// are known to have no alpha channel 303// TODO: move definition for device-specific range into 304// hardware.h, instead of using hard-coded values here. 305#define HARDWARE_IS_DEVICE_FORMAT(f) ((f) >= 0x100 && (f) <= 0x1FF) 306 307bool Layer::getOpacityForFormat(uint32_t format) 308{ 309 if (HARDWARE_IS_DEVICE_FORMAT(format)) { 310 return true; 311 } 312 PixelFormatInfo info; 313 status_t err = getPixelFormatInfo(PixelFormat(format), &info); 314 // in case of error (unknown format), we assume no blending 315 return (err || info.h_alpha <= info.l_alpha); 316} 317 318 319bool Layer::isOpaque() const 320{ 321 // if we don't have a buffer yet, we're translucent regardless of the 322 // layer's opaque flag. 323 if (mActiveBuffer == 0) { 324 return false; 325 } 326 327 // if the layer has the opaque flag, then we're always opaque, 328 // otherwise we use the current buffer's format. 329 return mOpaqueLayer || mCurrentOpacity; 330} 331 332bool Layer::isProtected() const 333{ 334 const sp<GraphicBuffer>& activeBuffer(mActiveBuffer); 335 return (activeBuffer != 0) && 336 (activeBuffer->getUsage() & GRALLOC_USAGE_PROTECTED); 337} 338 339uint32_t Layer::doTransaction(uint32_t flags) 340{ 341 const Layer::State& front(drawingState()); 342 const Layer::State& temp(currentState()); 343 344 const bool sizeChanged = (front.requested_w != temp.requested_w) || 345 (front.requested_h != temp.requested_h); 346 347 if (sizeChanged) { 348 // the size changed, we need to ask our client to request a new buffer 349 LOGD_IF(DEBUG_RESIZE, 350 "doTransaction: " 351 "resize (layer=%p), requested (%dx%d), drawing (%d,%d), " 352 "scalingMode=%d", 353 this, 354 int(temp.requested_w), int(temp.requested_h), 355 int(front.requested_w), int(front.requested_h), 356 mCurrentScalingMode); 357 358 if (!isFixedSize()) { 359 // we're being resized and there is a freeze display request, 360 // acquire a freeze lock, so that the screen stays put 361 // until we've redrawn at the new size; this is to avoid 362 // glitches upon orientation changes. 363 if (mFlinger->hasFreezeRequest()) { 364 // if the surface is hidden, don't try to acquire the 365 // freeze lock, since hidden surfaces may never redraw 366 if (!(front.flags & ISurfaceComposer::eLayerHidden)) { 367 mFreezeLock = mFlinger->getFreezeLock(); 368 } 369 } 370 371 // this will make sure LayerBase::doTransaction doesn't update 372 // the drawing state's size 373 Layer::State& editDraw(mDrawingState); 374 editDraw.requested_w = temp.requested_w; 375 editDraw.requested_h = temp.requested_h; 376 377 // record the new size, form this point on, when the client request 378 // a buffer, it'll get the new size. 379 mSurfaceTexture->setDefaultBufferSize(temp.requested_w, temp.requested_h); 380 } 381 } 382 383 if (temp.sequence != front.sequence) { 384 if (temp.flags & ISurfaceComposer::eLayerHidden || temp.alpha == 0) { 385 // this surface is now hidden, so it shouldn't hold a freeze lock 386 // (it may never redraw, which is fine if it is hidden) 387 mFreezeLock.clear(); 388 } 389 } 390 391 return LayerBase::doTransaction(flags); 392} 393 394bool Layer::isFixedSize() const { 395 return mCurrentScalingMode != NATIVE_WINDOW_SCALING_MODE_FREEZE; 396} 397 398bool Layer::isCropped() const { 399 return !mCurrentCrop.isEmpty(); 400} 401 402// ---------------------------------------------------------------------------- 403// pageflip handling... 404// ---------------------------------------------------------------------------- 405 406void Layer::lockPageFlip(bool& recomputeVisibleRegions) 407{ 408 if (mQueuedFrames > 0) { 409 const bool oldOpacity = isOpaque(); 410 411 // signal another event if we have more frames pending 412 if (android_atomic_dec(&mQueuedFrames) > 1) { 413 mFlinger->signalEvent(); 414 } 415 416 if (mSurfaceTexture->updateTexImage() < NO_ERROR) { 417 // something happened! 418 recomputeVisibleRegions = true; 419 return; 420 } 421 422 mActiveBuffer = mSurfaceTexture->getCurrentBuffer(); 423 mSurfaceTexture->getTransformMatrix(mTextureMatrix); 424 425 const Rect crop(mSurfaceTexture->getCurrentCrop()); 426 const uint32_t transform(mSurfaceTexture->getCurrentTransform()); 427 const uint32_t scalingMode(mSurfaceTexture->getCurrentScalingMode()); 428 if ((crop != mCurrentCrop) || 429 (transform != mCurrentTransform) || 430 (scalingMode != mCurrentScalingMode)) 431 { 432 mCurrentCrop = crop; 433 mCurrentTransform = transform; 434 mCurrentScalingMode = scalingMode; 435 mFlinger->invalidateHwcGeometry(); 436 } 437 438 mCurrentOpacity = getOpacityForFormat(mActiveBuffer->format); 439 if (oldOpacity != isOpaque()) { 440 recomputeVisibleRegions = true; 441 } 442 443 const GLenum target(mSurfaceTexture->getCurrentTextureTarget()); 444 glTexParameterx(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 445 glTexParameterx(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 446 447 // update the layer size and release freeze-lock 448 const Layer::State& front(drawingState()); 449 450 // FIXME: mPostedDirtyRegion = dirty & bounds 451 mPostedDirtyRegion.set(front.w, front.h); 452 453 454 if ((front.w != front.requested_w) || 455 (front.h != front.requested_h)) 456 { 457 // check that we received a buffer of the right size 458 // (Take the buffer's orientation into account) 459 sp<GraphicBuffer> newFrontBuffer(mActiveBuffer); 460 uint32_t bufWidth = newFrontBuffer->getWidth(); 461 uint32_t bufHeight = newFrontBuffer->getHeight(); 462 if (mCurrentTransform & Transform::ROT_90) { 463 swap(bufWidth, bufHeight); 464 } 465 466 if (isFixedSize() || 467 (bufWidth == front.requested_w && 468 bufHeight == front.requested_h)) 469 { 470 // Here we pretend the transaction happened by updating the 471 // current and drawing states. Drawing state is only accessed 472 // in this thread, no need to have it locked 473 Layer::State& editDraw(mDrawingState); 474 editDraw.w = editDraw.requested_w; 475 editDraw.h = editDraw.requested_h; 476 477 // We also need to update the current state so that we don't 478 // end-up doing too much work during the next transaction. 479 // NOTE: We actually don't need hold the transaction lock here 480 // because State::w and State::h are only accessed from 481 // this thread 482 Layer::State& editTemp(currentState()); 483 editTemp.w = editDraw.w; 484 editTemp.h = editDraw.h; 485 486 // recompute visible region 487 recomputeVisibleRegions = true; 488 489 // we now have the correct size, unfreeze the screen 490 mFreezeLock.clear(); 491 } 492 493 LOGD_IF(DEBUG_RESIZE, 494 "lockPageFlip : " 495 " (layer=%p), buffer (%ux%u, tr=%02x), " 496 "requested (%dx%d)", 497 this, 498 bufWidth, bufHeight, mCurrentTransform, 499 front.requested_w, front.requested_h); 500 } 501 } 502} 503 504void Layer::unlockPageFlip( 505 const Transform& planeTransform, Region& outDirtyRegion) 506{ 507 Region dirtyRegion(mPostedDirtyRegion); 508 if (!dirtyRegion.isEmpty()) { 509 mPostedDirtyRegion.clear(); 510 // The dirty region is given in the layer's coordinate space 511 // transform the dirty region by the surface's transformation 512 // and the global transformation. 513 const Layer::State& s(drawingState()); 514 const Transform tr(planeTransform * s.transform); 515 dirtyRegion = tr.transform(dirtyRegion); 516 517 // At this point, the dirty region is in screen space. 518 // Make sure it's constrained by the visible region (which 519 // is in screen space as well). 520 dirtyRegion.andSelf(visibleRegionScreen); 521 outDirtyRegion.orSelf(dirtyRegion); 522 } 523 if (visibleRegionScreen.isEmpty()) { 524 // an invisible layer should not hold a freeze-lock 525 // (because it may never be updated and therefore never release it) 526 mFreezeLock.clear(); 527 } 528} 529 530void Layer::dump(String8& result, char* buffer, size_t SIZE) const 531{ 532 LayerBaseClient::dump(result, buffer, SIZE); 533 534 sp<const GraphicBuffer> buf0(mActiveBuffer); 535 uint32_t w0=0, h0=0, s0=0, f0=0; 536 if (buf0 != 0) { 537 w0 = buf0->getWidth(); 538 h0 = buf0->getHeight(); 539 s0 = buf0->getStride(); 540 f0 = buf0->format; 541 } 542 snprintf(buffer, SIZE, 543 " " 544 "format=%2d, activeBuffer=[%4ux%4u:%4u,%3X]," 545 " freezeLock=%p, queued-frames=%d\n", 546 mFormat, w0, h0, s0,f0, 547 getFreezeLock().get(), mQueuedFrames); 548 549 result.append(buffer); 550 551 if (mSurfaceTexture != 0) { 552 mSurfaceTexture->dump(result, " ", buffer, SIZE); 553 } 554} 555 556uint32_t Layer::getEffectiveUsage(uint32_t usage) const 557{ 558 // TODO: should we do something special if mSecure is set? 559 if (mProtectedByApp) { 560 // need a hardware-protected path to external video sink 561 usage |= GraphicBuffer::USAGE_PROTECTED; 562 } 563 return usage; 564} 565 566// --------------------------------------------------------------------------- 567 568 569}; // namespace android 570