Layer.cpp revision 2a0d5b608447a880beff5149805425f02691442b
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 if (isCropped()) { 217 hwcl->sourceCrop.left = mCurrentCrop.left; 218 hwcl->sourceCrop.top = mCurrentCrop.top; 219 hwcl->sourceCrop.right = mCurrentCrop.right; 220 hwcl->sourceCrop.bottom = mCurrentCrop.bottom; 221 } else { 222 const sp<GraphicBuffer>& buffer(mActiveBuffer); 223 hwcl->sourceCrop.left = 0; 224 hwcl->sourceCrop.top = 0; 225 if (buffer != NULL) { 226 hwcl->sourceCrop.right = buffer->width; 227 hwcl->sourceCrop.bottom = buffer->height; 228 } else { 229 hwcl->sourceCrop.right = mTransformedBounds.width(); 230 hwcl->sourceCrop.bottom = mTransformedBounds.height(); 231 } 232 } 233} 234 235void Layer::setPerFrameData(hwc_layer_t* hwcl) { 236 const sp<GraphicBuffer>& buffer(mActiveBuffer); 237 if (buffer == NULL) { 238 // this can happen if the client never drew into this layer yet, 239 // or if we ran out of memory. In that case, don't let 240 // HWC handle it. 241 hwcl->flags |= HWC_SKIP_LAYER; 242 hwcl->handle = NULL; 243 } else { 244 hwcl->handle = buffer->handle; 245 } 246} 247 248void Layer::onDraw(const Region& clip) const 249{ 250 if (CC_UNLIKELY(mActiveBuffer == 0)) { 251 // the texture has not been created yet, this Layer has 252 // in fact never been drawn into. This happens frequently with 253 // SurfaceView because the WindowManager can't know when the client 254 // has drawn the first time. 255 256 // If there is nothing under us, we paint the screen in black, otherwise 257 // we just skip this update. 258 259 // figure out if there is something below us 260 Region under; 261 const SurfaceFlinger::LayerVector& drawingLayers( 262 mFlinger->mDrawingState.layersSortedByZ); 263 const size_t count = drawingLayers.size(); 264 for (size_t i=0 ; i<count ; ++i) { 265 const sp<LayerBase>& layer(drawingLayers[i]); 266 if (layer.get() == static_cast<LayerBase const*>(this)) 267 break; 268 under.orSelf(layer->visibleRegionScreen); 269 } 270 // if not everything below us is covered, we plug the holes! 271 Region holes(clip.subtract(under)); 272 if (!holes.isEmpty()) { 273 clearWithOpenGL(holes, 0, 0, 0, 1); 274 } 275 return; 276 } 277 278 const GLenum target = GL_TEXTURE_EXTERNAL_OES; 279 glBindTexture(target, mTextureName); 280 if (getFiltering() || needsFiltering() || isFixedSize() || isCropped()) { 281 // TODO: we could be more subtle with isFixedSize() 282 glTexParameterx(target, GL_TEXTURE_MAG_FILTER, GL_LINEAR); 283 glTexParameterx(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR); 284 } else { 285 glTexParameterx(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST); 286 glTexParameterx(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 287 } 288 glEnable(target); 289 glMatrixMode(GL_TEXTURE); 290 glLoadMatrixf(mTextureMatrix); 291 glMatrixMode(GL_MODELVIEW); 292 293 drawWithOpenGL(clip); 294 295 glDisable(target); 296} 297 298// As documented in libhardware header, formats in the range 299// 0x100 - 0x1FF are specific to the HAL implementation, and 300// are known to have no alpha channel 301// TODO: move definition for device-specific range into 302// hardware.h, instead of using hard-coded values here. 303#define HARDWARE_IS_DEVICE_FORMAT(f) ((f) >= 0x100 && (f) <= 0x1FF) 304 305bool Layer::getOpacityForFormat(uint32_t format) 306{ 307 if (HARDWARE_IS_DEVICE_FORMAT(format)) { 308 return true; 309 } 310 PixelFormatInfo info; 311 status_t err = getPixelFormatInfo(PixelFormat(format), &info); 312 // in case of error (unknown format), we assume no blending 313 return (err || info.h_alpha <= info.l_alpha); 314} 315 316 317bool Layer::isOpaque() const 318{ 319 // if we don't have a buffer yet, we're translucent regardless of the 320 // layer's opaque flag. 321 if (mActiveBuffer == 0) { 322 return false; 323 } 324 325 // if the layer has the opaque flag, then we're always opaque, 326 // otherwise we use the current buffer's format. 327 return mOpaqueLayer || mCurrentOpacity; 328} 329 330bool Layer::isProtected() const 331{ 332 const sp<GraphicBuffer>& activeBuffer(mActiveBuffer); 333 return (activeBuffer != 0) && 334 (activeBuffer->getUsage() & GRALLOC_USAGE_PROTECTED); 335} 336 337uint32_t Layer::doTransaction(uint32_t flags) 338{ 339 const Layer::State& front(drawingState()); 340 const Layer::State& temp(currentState()); 341 342 const bool sizeChanged = (front.requested_w != temp.requested_w) || 343 (front.requested_h != temp.requested_h); 344 345 if (sizeChanged) { 346 // the size changed, we need to ask our client to request a new buffer 347 LOGD_IF(DEBUG_RESIZE, 348 "doTransaction: " 349 "resize (layer=%p), requested (%dx%d), drawing (%d,%d), " 350 "scalingMode=%d", 351 this, 352 int(temp.requested_w), int(temp.requested_h), 353 int(front.requested_w), int(front.requested_h), 354 mCurrentScalingMode); 355 356 if (!isFixedSize()) { 357 // we're being resized and there is a freeze display request, 358 // acquire a freeze lock, so that the screen stays put 359 // until we've redrawn at the new size; this is to avoid 360 // glitches upon orientation changes. 361 if (mFlinger->hasFreezeRequest()) { 362 // if the surface is hidden, don't try to acquire the 363 // freeze lock, since hidden surfaces may never redraw 364 if (!(front.flags & ISurfaceComposer::eLayerHidden)) { 365 mFreezeLock = mFlinger->getFreezeLock(); 366 } 367 } 368 369 // this will make sure LayerBase::doTransaction doesn't update 370 // the drawing state's size 371 Layer::State& editDraw(mDrawingState); 372 editDraw.requested_w = temp.requested_w; 373 editDraw.requested_h = temp.requested_h; 374 } 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, 379 temp.requested_h); 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 sp<GraphicBuffer> newFrontBuffer(mSurfaceTexture->getCurrentBuffer()); 422 423 const Rect crop(mSurfaceTexture->getCurrentCrop()); 424 const uint32_t transform(mSurfaceTexture->getCurrentTransform()); 425 const uint32_t scalingMode(mSurfaceTexture->getCurrentScalingMode()); 426 if ((crop != mCurrentCrop) || 427 (transform != mCurrentTransform) || 428 (scalingMode != mCurrentScalingMode)) 429 { 430 mCurrentCrop = crop; 431 mCurrentTransform = transform; 432 mCurrentScalingMode = scalingMode; 433 mFlinger->invalidateHwcGeometry(); 434 } 435 436 GLfloat textureMatrix[16]; 437 mSurfaceTexture->getTransformMatrix(textureMatrix); 438 if (memcmp(textureMatrix, mTextureMatrix, sizeof(textureMatrix))) { 439 memcpy(mTextureMatrix, textureMatrix, sizeof(textureMatrix)); 440 mFlinger->invalidateHwcGeometry(); 441 } 442 443 uint32_t bufWidth = newFrontBuffer->getWidth(); 444 uint32_t bufHeight = newFrontBuffer->getHeight(); 445 if (mActiveBuffer != NULL) { 446 if (bufWidth != uint32_t(mActiveBuffer->width) || 447 bufHeight != uint32_t(mActiveBuffer->height)) { 448 mFlinger->invalidateHwcGeometry(); 449 } 450 } 451 452 mCurrentOpacity = getOpacityForFormat(newFrontBuffer->format); 453 if (oldOpacity != isOpaque()) { 454 recomputeVisibleRegions = true; 455 } 456 457 glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 458 glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 459 460 // update the layer size and release freeze-lock 461 const Layer::State& front(drawingState()); 462 463 // FIXME: mPostedDirtyRegion = dirty & bounds 464 mPostedDirtyRegion.set(front.w, front.h); 465 466 // update active buffer 467 mActiveBuffer = newFrontBuffer; 468 469 if ((front.w != front.requested_w) || 470 (front.h != front.requested_h)) 471 { 472 // check that we received a buffer of the right size 473 // (Take the buffer's orientation into account) 474 if (mCurrentTransform & Transform::ROT_90) { 475 swap(bufWidth, bufHeight); 476 } 477 478 if (isFixedSize() || 479 (bufWidth == front.requested_w && 480 bufHeight == front.requested_h)) 481 { 482 // Here we pretend the transaction happened by updating the 483 // current and drawing states. Drawing state is only accessed 484 // in this thread, no need to have it locked 485 Layer::State& editDraw(mDrawingState); 486 editDraw.w = editDraw.requested_w; 487 editDraw.h = editDraw.requested_h; 488 489 // We also need to update the current state so that we don't 490 // end-up doing too much work during the next transaction. 491 // NOTE: We actually don't need hold the transaction lock here 492 // because State::w and State::h are only accessed from 493 // this thread 494 Layer::State& editTemp(currentState()); 495 editTemp.w = editDraw.w; 496 editTemp.h = editDraw.h; 497 498 // recompute visible region 499 recomputeVisibleRegions = true; 500 501 // we now have the correct size, unfreeze the screen 502 mFreezeLock.clear(); 503 } 504 505 LOGD_IF(DEBUG_RESIZE, 506 "lockPageFlip : " 507 " (layer=%p), buffer (%ux%u, tr=%02x), " 508 "requested (%dx%d)", 509 this, 510 bufWidth, bufHeight, mCurrentTransform, 511 front.requested_w, front.requested_h); 512 } 513 } 514} 515 516void Layer::unlockPageFlip( 517 const Transform& planeTransform, Region& outDirtyRegion) 518{ 519 Region dirtyRegion(mPostedDirtyRegion); 520 if (!dirtyRegion.isEmpty()) { 521 mPostedDirtyRegion.clear(); 522 // The dirty region is given in the layer's coordinate space 523 // transform the dirty region by the surface's transformation 524 // and the global transformation. 525 const Layer::State& s(drawingState()); 526 const Transform tr(planeTransform * s.transform); 527 dirtyRegion = tr.transform(dirtyRegion); 528 529 // At this point, the dirty region is in screen space. 530 // Make sure it's constrained by the visible region (which 531 // is in screen space as well). 532 dirtyRegion.andSelf(visibleRegionScreen); 533 outDirtyRegion.orSelf(dirtyRegion); 534 } 535 if (visibleRegionScreen.isEmpty()) { 536 // an invisible layer should not hold a freeze-lock 537 // (because it may never be updated and therefore never release it) 538 mFreezeLock.clear(); 539 } 540} 541 542void Layer::dump(String8& result, char* buffer, size_t SIZE) const 543{ 544 LayerBaseClient::dump(result, buffer, SIZE); 545 546 sp<const GraphicBuffer> buf0(mActiveBuffer); 547 uint32_t w0=0, h0=0, s0=0, f0=0; 548 if (buf0 != 0) { 549 w0 = buf0->getWidth(); 550 h0 = buf0->getHeight(); 551 s0 = buf0->getStride(); 552 f0 = buf0->format; 553 } 554 snprintf(buffer, SIZE, 555 " " 556 "format=%2d, activeBuffer=[%4ux%4u:%4u,%3X]," 557 " freezeLock=%p, transform-hint=0x%02x, queued-frames=%d\n", 558 mFormat, w0, h0, s0,f0, 559 getFreezeLock().get(), getTransformHint(), mQueuedFrames); 560 561 result.append(buffer); 562 563 if (mSurfaceTexture != 0) { 564 mSurfaceTexture->dump(result, " ", buffer, SIZE); 565 } 566} 567 568uint32_t Layer::getEffectiveUsage(uint32_t usage) const 569{ 570 // TODO: should we do something special if mSecure is set? 571 if (mProtectedByApp) { 572 // need a hardware-protected path to external video sink 573 usage |= GraphicBuffer::USAGE_PROTECTED; 574 } 575 usage |= GraphicBuffer::USAGE_HW_COMPOSER; 576 return usage; 577} 578 579uint32_t Layer::getTransformHint() const { 580 uint32_t orientation = 0; 581 if (!mFlinger->mDebugDisableTransformHint) { 582 orientation = getOrientation(); 583 if (orientation & Transform::ROT_INVALID) { 584 orientation = 0; 585 } 586 } 587 return orientation; 588} 589 590// --------------------------------------------------------------------------- 591 592 593}; // namespace android 594