Layer.cpp revision 85b6f7afeab61b75e4326639a9f4cb61523ea997
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 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( 261 mFlinger->mDrawingState.layersSortedByZ); 262 const size_t count = drawingLayers.size(); 263 for (size_t i=0 ; i<count ; ++i) { 264 const sp<LayerBase>& layer(drawingLayers[i]); 265 if (layer.get() == static_cast<LayerBase const*>(this)) 266 break; 267 under.orSelf(layer->visibleRegionScreen); 268 } 269 // if not everything below us is covered, we plug the holes! 270 Region holes(clip.subtract(under)); 271 if (!holes.isEmpty()) { 272 clearWithOpenGL(holes, 0, 0, 0, 1); 273 } 274 return; 275 } 276 277 const GLenum target = GL_TEXTURE_EXTERNAL_OES; 278 glBindTexture(target, mTextureName); 279 if (getFiltering() || needsFiltering() || isFixedSize() || isCropped()) { 280 // TODO: we could be more subtle with isFixedSize() 281 glTexParameterx(target, GL_TEXTURE_MAG_FILTER, GL_LINEAR); 282 glTexParameterx(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR); 283 } else { 284 glTexParameterx(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST); 285 glTexParameterx(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 286 } 287 glEnable(target); 288 glMatrixMode(GL_TEXTURE); 289 glLoadMatrixf(mTextureMatrix); 290 glMatrixMode(GL_MODELVIEW); 291 292 drawWithOpenGL(clip); 293 294 glDisable(target); 295} 296 297// As documented in libhardware header, formats in the range 298// 0x100 - 0x1FF are specific to the HAL implementation, and 299// are known to have no alpha channel 300// TODO: move definition for device-specific range into 301// hardware.h, instead of using hard-coded values here. 302#define HARDWARE_IS_DEVICE_FORMAT(f) ((f) >= 0x100 && (f) <= 0x1FF) 303 304bool Layer::getOpacityForFormat(uint32_t format) 305{ 306 if (HARDWARE_IS_DEVICE_FORMAT(format)) { 307 return true; 308 } 309 PixelFormatInfo info; 310 status_t err = getPixelFormatInfo(PixelFormat(format), &info); 311 // in case of error (unknown format), we assume no blending 312 return (err || info.h_alpha <= info.l_alpha); 313} 314 315 316bool Layer::isOpaque() const 317{ 318 // if we don't have a buffer yet, we're translucent regardless of the 319 // layer's opaque flag. 320 if (mActiveBuffer == 0) { 321 return false; 322 } 323 324 // if the layer has the opaque flag, then we're always opaque, 325 // otherwise we use the current buffer's format. 326 return mOpaqueLayer || mCurrentOpacity; 327} 328 329bool Layer::isProtected() const 330{ 331 const sp<GraphicBuffer>& activeBuffer(mActiveBuffer); 332 return (activeBuffer != 0) && 333 (activeBuffer->getUsage() & GRALLOC_USAGE_PROTECTED); 334} 335 336uint32_t Layer::doTransaction(uint32_t flags) 337{ 338 const Layer::State& front(drawingState()); 339 const Layer::State& temp(currentState()); 340 341 const bool sizeChanged = (front.requested_w != temp.requested_w) || 342 (front.requested_h != temp.requested_h); 343 344 if (sizeChanged) { 345 // the size changed, we need to ask our client to request a new buffer 346 LOGD_IF(DEBUG_RESIZE, 347 "doTransaction: " 348 "resize (layer=%p), requested (%dx%d), drawing (%d,%d), " 349 "scalingMode=%d", 350 this, 351 int(temp.requested_w), int(temp.requested_h), 352 int(front.requested_w), int(front.requested_h), 353 mCurrentScalingMode); 354 355 if (!isFixedSize()) { 356 // we're being resized and there is a freeze display request, 357 // acquire a freeze lock, so that the screen stays put 358 // until we've redrawn at the new size; this is to avoid 359 // glitches upon orientation changes. 360 if (mFlinger->hasFreezeRequest()) { 361 // if the surface is hidden, don't try to acquire the 362 // freeze lock, since hidden surfaces may never redraw 363 if (!(front.flags & ISurfaceComposer::eLayerHidden)) { 364 mFreezeLock = mFlinger->getFreezeLock(); 365 } 366 } 367 368 // this will make sure LayerBase::doTransaction doesn't update 369 // the drawing state's size 370 Layer::State& editDraw(mDrawingState); 371 editDraw.requested_w = temp.requested_w; 372 editDraw.requested_h = temp.requested_h; 373 374 // record the new size, form this point on, when the client request 375 // a buffer, it'll get the new size. 376 mSurfaceTexture->setDefaultBufferSize(temp.requested_w, temp.requested_h); 377 } 378 } 379 380 if (temp.sequence != front.sequence) { 381 if (temp.flags & ISurfaceComposer::eLayerHidden || temp.alpha == 0) { 382 // this surface is now hidden, so it shouldn't hold a freeze lock 383 // (it may never redraw, which is fine if it is hidden) 384 mFreezeLock.clear(); 385 } 386 } 387 388 return LayerBase::doTransaction(flags); 389} 390 391bool Layer::isFixedSize() const { 392 return mCurrentScalingMode != NATIVE_WINDOW_SCALING_MODE_FREEZE; 393} 394 395bool Layer::isCropped() const { 396 return !mCurrentCrop.isEmpty(); 397} 398 399// ---------------------------------------------------------------------------- 400// pageflip handling... 401// ---------------------------------------------------------------------------- 402 403void Layer::lockPageFlip(bool& recomputeVisibleRegions) 404{ 405 if (mQueuedFrames > 0) { 406 const bool oldOpacity = isOpaque(); 407 408 // signal another event if we have more frames pending 409 if (android_atomic_dec(&mQueuedFrames) > 1) { 410 mFlinger->signalEvent(); 411 } 412 413 if (mSurfaceTexture->updateTexImage() < NO_ERROR) { 414 // something happened! 415 recomputeVisibleRegions = true; 416 return; 417 } 418 419 mActiveBuffer = mSurfaceTexture->getCurrentBuffer(); 420 mSurfaceTexture->getTransformMatrix(mTextureMatrix); 421 422 const Rect crop(mSurfaceTexture->getCurrentCrop()); 423 const uint32_t transform(mSurfaceTexture->getCurrentTransform()); 424 const uint32_t scalingMode(mSurfaceTexture->getCurrentScalingMode()); 425 if ((crop != mCurrentCrop) || 426 (transform != mCurrentTransform) || 427 (scalingMode != mCurrentScalingMode)) 428 { 429 mCurrentCrop = crop; 430 mCurrentTransform = transform; 431 mCurrentScalingMode = scalingMode; 432 mFlinger->invalidateHwcGeometry(); 433 } 434 435 mCurrentOpacity = getOpacityForFormat(mActiveBuffer->format); 436 if (oldOpacity != isOpaque()) { 437 recomputeVisibleRegions = true; 438 } 439 440 glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 441 glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 442 443 // update the layer size and release freeze-lock 444 const Layer::State& front(drawingState()); 445 446 // FIXME: mPostedDirtyRegion = dirty & bounds 447 mPostedDirtyRegion.set(front.w, front.h); 448 449 450 if ((front.w != front.requested_w) || 451 (front.h != front.requested_h)) 452 { 453 // check that we received a buffer of the right size 454 // (Take the buffer's orientation into account) 455 sp<GraphicBuffer> newFrontBuffer(mActiveBuffer); 456 uint32_t bufWidth = newFrontBuffer->getWidth(); 457 uint32_t bufHeight = newFrontBuffer->getHeight(); 458 if (mCurrentTransform & Transform::ROT_90) { 459 swap(bufWidth, bufHeight); 460 } 461 462 if (isFixedSize() || 463 (bufWidth == front.requested_w && 464 bufHeight == front.requested_h)) 465 { 466 // Here we pretend the transaction happened by updating the 467 // current and drawing states. Drawing state is only accessed 468 // in this thread, no need to have it locked 469 Layer::State& editDraw(mDrawingState); 470 editDraw.w = editDraw.requested_w; 471 editDraw.h = editDraw.requested_h; 472 473 // We also need to update the current state so that we don't 474 // end-up doing too much work during the next transaction. 475 // NOTE: We actually don't need hold the transaction lock here 476 // because State::w and State::h are only accessed from 477 // this thread 478 Layer::State& editTemp(currentState()); 479 editTemp.w = editDraw.w; 480 editTemp.h = editDraw.h; 481 482 // recompute visible region 483 recomputeVisibleRegions = true; 484 485 // we now have the correct size, unfreeze the screen 486 mFreezeLock.clear(); 487 } 488 489 LOGD_IF(DEBUG_RESIZE, 490 "lockPageFlip : " 491 " (layer=%p), buffer (%ux%u, tr=%02x), " 492 "requested (%dx%d)", 493 this, 494 bufWidth, bufHeight, mCurrentTransform, 495 front.requested_w, front.requested_h); 496 } 497 } 498} 499 500void Layer::unlockPageFlip( 501 const Transform& planeTransform, Region& outDirtyRegion) 502{ 503 Region dirtyRegion(mPostedDirtyRegion); 504 if (!dirtyRegion.isEmpty()) { 505 mPostedDirtyRegion.clear(); 506 // The dirty region is given in the layer's coordinate space 507 // transform the dirty region by the surface's transformation 508 // and the global transformation. 509 const Layer::State& s(drawingState()); 510 const Transform tr(planeTransform * s.transform); 511 dirtyRegion = tr.transform(dirtyRegion); 512 513 // At this point, the dirty region is in screen space. 514 // Make sure it's constrained by the visible region (which 515 // is in screen space as well). 516 dirtyRegion.andSelf(visibleRegionScreen); 517 outDirtyRegion.orSelf(dirtyRegion); 518 } 519 if (visibleRegionScreen.isEmpty()) { 520 // an invisible layer should not hold a freeze-lock 521 // (because it may never be updated and therefore never release it) 522 mFreezeLock.clear(); 523 } 524} 525 526void Layer::dump(String8& result, char* buffer, size_t SIZE) const 527{ 528 LayerBaseClient::dump(result, buffer, SIZE); 529 530 sp<const GraphicBuffer> buf0(mActiveBuffer); 531 uint32_t w0=0, h0=0, s0=0, f0=0; 532 if (buf0 != 0) { 533 w0 = buf0->getWidth(); 534 h0 = buf0->getHeight(); 535 s0 = buf0->getStride(); 536 f0 = buf0->format; 537 } 538 snprintf(buffer, SIZE, 539 " " 540 "format=%2d, activeBuffer=[%4ux%4u:%4u,%3X]," 541 " freezeLock=%p, transform-hint=0x%02x, queued-frames=%d\n", 542 mFormat, w0, h0, s0,f0, 543 getFreezeLock().get(), getTransformHint(), mQueuedFrames); 544 545 result.append(buffer); 546 547 if (mSurfaceTexture != 0) { 548 mSurfaceTexture->dump(result, " ", buffer, SIZE); 549 } 550} 551 552uint32_t Layer::getEffectiveUsage(uint32_t usage) const 553{ 554 // TODO: should we do something special if mSecure is set? 555 if (mProtectedByApp) { 556 // need a hardware-protected path to external video sink 557 usage |= GraphicBuffer::USAGE_PROTECTED; 558 } 559 usage |= GraphicBuffer::USAGE_HW_COMPOSER; 560 return usage; 561} 562 563uint32_t Layer::getTransformHint() const { 564 uint32_t orientation = 0; 565 if (!mFlinger->mDebugDisableTransformHint) { 566 orientation = getOrientation(); 567 if (orientation & Transform::ROT_INVALID) { 568 orientation = 0; 569 } 570 } 571 return orientation; 572} 573 574// --------------------------------------------------------------------------- 575 576 577}; // namespace android 578