Layer.cpp revision a45836466c301d49d8df286b5317dfa99cb83b70
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 * mTransform 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 tr(mTransform * bufferOrientation); 205 206 // this gives us only the "orientation" component of the transform 207 const uint32_t finalTransform = tr.getOrientation(); 208 209 // we can only handle simple transformation 210 if (finalTransform & Transform::ROT_INVALID) { 211 hwcl->flags = HWC_SKIP_LAYER; 212 } else { 213 hwcl->transform = finalTransform; 214 } 215} 216 217void Layer::setPerFrameData(hwc_layer_t* hwcl) { 218 const sp<GraphicBuffer>& buffer(mActiveBuffer); 219 if (buffer == NULL) { 220 // this can happen if the client never drew into this layer yet, 221 // or if we ran out of memory. In that case, don't let 222 // HWC handle it. 223 hwcl->flags |= HWC_SKIP_LAYER; 224 hwcl->handle = NULL; 225 } else { 226 hwcl->handle = buffer->handle; 227 } 228 229 if (isCropped()) { 230 hwcl->sourceCrop.left = mCurrentCrop.left; 231 hwcl->sourceCrop.top = mCurrentCrop.top; 232 hwcl->sourceCrop.right = mCurrentCrop.right; 233 hwcl->sourceCrop.bottom = mCurrentCrop.bottom; 234 } else { 235 hwcl->sourceCrop.left = 0; 236 hwcl->sourceCrop.top = 0; 237 if (buffer != NULL) { 238 hwcl->sourceCrop.right = buffer->width; 239 hwcl->sourceCrop.bottom = buffer->height; 240 } else { 241 hwcl->sourceCrop.right = mTransformedBounds.width(); 242 hwcl->sourceCrop.bottom = mTransformedBounds.height(); 243 } 244 } 245} 246 247static inline uint16_t pack565(int r, int g, int b) { 248 return (r<<11)|(g<<5)|b; 249} 250void Layer::onDraw(const Region& clip) const 251{ 252 if (CC_UNLIKELY(mActiveBuffer == 0)) { 253 // the texture has not been created yet, this Layer has 254 // in fact never been drawn into. This happens frequently with 255 // SurfaceView because the WindowManager can't know when the client 256 // has drawn the first time. 257 258 // If there is nothing under us, we paint the screen in black, otherwise 259 // we just skip this update. 260 261 // figure out if there is something below us 262 Region under; 263 const SurfaceFlinger::LayerVector& drawingLayers(mFlinger->mDrawingState.layersSortedByZ); 264 const size_t count = drawingLayers.size(); 265 for (size_t i=0 ; i<count ; ++i) { 266 const sp<LayerBase>& layer(drawingLayers[i]); 267 if (layer.get() == static_cast<LayerBase const*>(this)) 268 break; 269 under.orSelf(layer->visibleRegionScreen); 270 } 271 // if not everything below us is covered, we plug the holes! 272 Region holes(clip.subtract(under)); 273 if (!holes.isEmpty()) { 274 clearWithOpenGL(holes, 0, 0, 0, 1); 275 } 276 return; 277 } 278 279 GLenum target = mSurfaceTexture->getCurrentTextureTarget(); 280 glBindTexture(target, mTextureName); 281 if (getFiltering() || needsFiltering() || isFixedSize() || isCropped()) { 282 // TODO: we could be more subtle with isFixedSize() 283 glTexParameterx(target, GL_TEXTURE_MAG_FILTER, GL_LINEAR); 284 glTexParameterx(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR); 285 } else { 286 glTexParameterx(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST); 287 glTexParameterx(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 288 } 289 glEnable(target); 290 glMatrixMode(GL_TEXTURE); 291 glLoadMatrixf(mTextureMatrix); 292 glMatrixMode(GL_MODELVIEW); 293 294 drawWithOpenGL(clip); 295 296 glDisable(target); 297} 298 299// As documented in libhardware header, formats in the range 300// 0x100 - 0x1FF are specific to the HAL implementation, and 301// are known to have no alpha channel 302// TODO: move definition for device-specific range into 303// hardware.h, instead of using hard-coded values here. 304#define HARDWARE_IS_DEVICE_FORMAT(f) ((f) >= 0x100 && (f) <= 0x1FF) 305 306bool Layer::getOpacityForFormat(uint32_t format) 307{ 308 if (HARDWARE_IS_DEVICE_FORMAT(format)) { 309 return true; 310 } 311 PixelFormatInfo info; 312 status_t err = getPixelFormatInfo(PixelFormat(format), &info); 313 // in case of error (unknown format), we assume no blending 314 return (err || info.h_alpha <= info.l_alpha); 315} 316 317 318bool Layer::isOpaque() const 319{ 320 // if we don't have a buffer yet, we're translucent regardless of the 321 // layer's opaque flag. 322 if (mActiveBuffer == 0) { 323 return false; 324 } 325 326 // if the layer has the opaque flag, then we're always opaque, 327 // otherwise we use the current buffer's format. 328 return mOpaqueLayer || mCurrentOpacity; 329} 330 331bool Layer::isProtected() const 332{ 333 const sp<GraphicBuffer>& activeBuffer(mActiveBuffer); 334 return (activeBuffer != 0) && 335 (activeBuffer->getUsage() & GRALLOC_USAGE_PROTECTED); 336} 337 338uint32_t Layer::doTransaction(uint32_t flags) 339{ 340 const Layer::State& front(drawingState()); 341 const Layer::State& temp(currentState()); 342 343 const bool sizeChanged = (front.requested_w != temp.requested_w) || 344 (front.requested_h != temp.requested_h); 345 346 if (sizeChanged) { 347 // the size changed, we need to ask our client to request a new buffer 348 LOGD_IF(DEBUG_RESIZE, 349 "doTransaction: " 350 "resize (layer=%p), requested (%dx%d), drawing (%d,%d), " 351 "scalingMode=%d", 352 this, 353 int(temp.requested_w), int(temp.requested_h), 354 int(front.requested_w), int(front.requested_h), 355 mCurrentScalingMode); 356 357 if (!isFixedSize()) { 358 // we're being resized and there is a freeze display request, 359 // acquire a freeze lock, so that the screen stays put 360 // until we've redrawn at the new size; this is to avoid 361 // glitches upon orientation changes. 362 if (mFlinger->hasFreezeRequest()) { 363 // if the surface is hidden, don't try to acquire the 364 // freeze lock, since hidden surfaces may never redraw 365 if (!(front.flags & ISurfaceComposer::eLayerHidden)) { 366 mFreezeLock = mFlinger->getFreezeLock(); 367 } 368 } 369 370 // this will make sure LayerBase::doTransaction doesn't update 371 // the drawing state's size 372 Layer::State& editDraw(mDrawingState); 373 editDraw.requested_w = temp.requested_w; 374 editDraw.requested_h = temp.requested_h; 375 376 // record the new size, form this point on, when the client request 377 // a buffer, it'll get the new size. 378 mSurfaceTexture->setDefaultBufferSize(temp.requested_w, temp.requested_h); 379 } 380 } 381 382 if (temp.sequence != front.sequence) { 383 if (temp.flags & ISurfaceComposer::eLayerHidden || temp.alpha == 0) { 384 // this surface is now hidden, so it shouldn't hold a freeze lock 385 // (it may never redraw, which is fine if it is hidden) 386 mFreezeLock.clear(); 387 } 388 } 389 390 return LayerBase::doTransaction(flags); 391} 392 393bool Layer::isFixedSize() const { 394 return mCurrentScalingMode != NATIVE_WINDOW_SCALING_MODE_FREEZE; 395} 396 397bool Layer::isCropped() const { 398 return !mCurrentCrop.isEmpty(); 399} 400 401// ---------------------------------------------------------------------------- 402// pageflip handling... 403// ---------------------------------------------------------------------------- 404 405void Layer::lockPageFlip(bool& recomputeVisibleRegions) 406{ 407 if (mQueuedFrames > 0) { 408 const bool oldOpacity = isOpaque(); 409 410 // signal another event if we have more frames pending 411 if (android_atomic_dec(&mQueuedFrames) > 1) { 412 mFlinger->signalEvent(); 413 } 414 415 if (mSurfaceTexture->updateTexImage() < NO_ERROR) { 416 // something happened! 417 recomputeVisibleRegions = true; 418 return; 419 } 420 421 mActiveBuffer = mSurfaceTexture->getCurrentBuffer(); 422 mSurfaceTexture->getTransformMatrix(mTextureMatrix); 423 424 const Rect crop(mSurfaceTexture->getCurrentCrop()); 425 const uint32_t transform(mSurfaceTexture->getCurrentTransform()); 426 const uint32_t scalingMode(mSurfaceTexture->getCurrentScalingMode()); 427 if ((crop != mCurrentCrop) || 428 (transform != mCurrentTransform) || 429 (scalingMode != mCurrentScalingMode)) 430 { 431 mCurrentCrop = crop; 432 mCurrentTransform = transform; 433 mCurrentScalingMode = scalingMode; 434 mFlinger->invalidateHwcGeometry(); 435 } 436 437 mCurrentOpacity = getOpacityForFormat(mActiveBuffer->format); 438 if (oldOpacity != isOpaque()) { 439 recomputeVisibleRegions = true; 440 } 441 442 const GLenum target(mSurfaceTexture->getCurrentTextureTarget()); 443 glTexParameterx(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 444 glTexParameterx(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 445 446 // update the layer size and release freeze-lock 447 const Layer::State& front(drawingState()); 448 449 // FIXME: mPostedDirtyRegion = dirty & bounds 450 mPostedDirtyRegion.set(front.w, front.h); 451 452 453 if ((front.w != front.requested_w) || 454 (front.h != front.requested_h)) 455 { 456 // check that we received a buffer of the right size 457 // (Take the buffer's orientation into account) 458 sp<GraphicBuffer> newFrontBuffer(mActiveBuffer); 459 uint32_t bufWidth = newFrontBuffer->getWidth(); 460 uint32_t bufHeight = newFrontBuffer->getHeight(); 461 if (mCurrentTransform & Transform::ROT_90) { 462 swap(bufWidth, bufHeight); 463 } 464 465 if (isFixedSize() || 466 (bufWidth == front.requested_w && 467 bufHeight == front.requested_h)) 468 { 469 // Here we pretend the transaction happened by updating the 470 // current and drawing states. Drawing state is only accessed 471 // in this thread, no need to have it locked 472 Layer::State& editDraw(mDrawingState); 473 editDraw.w = editDraw.requested_w; 474 editDraw.h = editDraw.requested_h; 475 476 // We also need to update the current state so that we don't 477 // end-up doing too much work during the next transaction. 478 // NOTE: We actually don't need hold the transaction lock here 479 // because State::w and State::h are only accessed from 480 // this thread 481 Layer::State& editTemp(currentState()); 482 editTemp.w = editDraw.w; 483 editTemp.h = editDraw.h; 484 485 // recompute visible region 486 recomputeVisibleRegions = true; 487 488 // we now have the correct size, unfreeze the screen 489 mFreezeLock.clear(); 490 } 491 492 LOGD_IF(DEBUG_RESIZE, 493 "lockPageFlip : " 494 " (layer=%p), buffer (%ux%u, tr=%02x), " 495 "requested (%dx%d)", 496 this, 497 bufWidth, bufHeight, mCurrentTransform, 498 front.requested_w, front.requested_h); 499 } 500 } 501} 502 503void Layer::unlockPageFlip( 504 const Transform& planeTransform, Region& outDirtyRegion) 505{ 506 Region dirtyRegion(mPostedDirtyRegion); 507 if (!dirtyRegion.isEmpty()) { 508 mPostedDirtyRegion.clear(); 509 // The dirty region is given in the layer's coordinate space 510 // transform the dirty region by the surface's transformation 511 // and the global transformation. 512 const Layer::State& s(drawingState()); 513 const Transform tr(planeTransform * s.transform); 514 dirtyRegion = tr.transform(dirtyRegion); 515 516 // At this point, the dirty region is in screen space. 517 // Make sure it's constrained by the visible region (which 518 // is in screen space as well). 519 dirtyRegion.andSelf(visibleRegionScreen); 520 outDirtyRegion.orSelf(dirtyRegion); 521 } 522 if (visibleRegionScreen.isEmpty()) { 523 // an invisible layer should not hold a freeze-lock 524 // (because it may never be updated and therefore never release it) 525 mFreezeLock.clear(); 526 } 527} 528 529void Layer::dump(String8& result, char* buffer, size_t SIZE) const 530{ 531 LayerBaseClient::dump(result, buffer, SIZE); 532 533 sp<const GraphicBuffer> buf0(mActiveBuffer); 534 uint32_t w0=0, h0=0, s0=0, f0=0; 535 if (buf0 != 0) { 536 w0 = buf0->getWidth(); 537 h0 = buf0->getHeight(); 538 s0 = buf0->getStride(); 539 f0 = buf0->format; 540 } 541 snprintf(buffer, SIZE, 542 " " 543 "format=%2d, activeBuffer=[%4ux%4u:%4u,%3X]," 544 " freezeLock=%p, transform-hint=0x%02x, queued-frames=%d\n", 545 mFormat, w0, h0, s0,f0, 546 getFreezeLock().get(), getTransformHint(), mQueuedFrames); 547 548 result.append(buffer); 549 550 if (mSurfaceTexture != 0) { 551 mSurfaceTexture->dump(result, " ", buffer, SIZE); 552 } 553} 554 555uint32_t Layer::getEffectiveUsage(uint32_t usage) const 556{ 557 // TODO: should we do something special if mSecure is set? 558 if (mProtectedByApp) { 559 // need a hardware-protected path to external video sink 560 usage |= GraphicBuffer::USAGE_PROTECTED; 561 } 562 return usage; 563} 564 565uint32_t Layer::getTransformHint() const { 566 uint32_t orientation = 0; 567 if (!mFlinger->mDebugDisableTransformHint) { 568 orientation = getOrientation(); 569 if (orientation & Transform::ROT_INVALID) { 570 orientation = 0; 571 } 572 } 573 return orientation; 574} 575 576// --------------------------------------------------------------------------- 577 578 579}; // namespace android 580