Layer.cpp revision 118d0245ee0a3b107055782aa8b555404b6f0280
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 mFlinger->postMessageAsync( 92 new SurfaceFlinger::MessageDestroyGLTexture(mTextureName) ); 93} 94 95void Layer::onFrameQueued() { 96 android_atomic_inc(&mQueuedFrames); 97 mFlinger->signalEvent(); 98} 99 100// called with SurfaceFlinger::mStateLock as soon as the layer is entered 101// in the purgatory list 102void Layer::onRemoved() 103{ 104 mSurfaceTexture->abandon(); 105} 106 107void Layer::setName(const String8& name) { 108 LayerBase::setName(name); 109 mSurfaceTexture->setName(name); 110} 111 112sp<ISurface> Layer::createSurface() 113{ 114 class BSurface : public BnSurface, public LayerCleaner { 115 wp<const Layer> mOwner; 116 virtual sp<ISurfaceTexture> getSurfaceTexture() const { 117 sp<ISurfaceTexture> res; 118 sp<const Layer> that( mOwner.promote() ); 119 if (that != NULL) { 120 res = that->mSurfaceTexture; 121 } 122 return res; 123 } 124 public: 125 BSurface(const sp<SurfaceFlinger>& flinger, 126 const sp<Layer>& layer) 127 : LayerCleaner(flinger, layer), mOwner(layer) { } 128 }; 129 sp<ISurface> sur(new BSurface(mFlinger, this)); 130 return sur; 131} 132 133wp<IBinder> Layer::getSurfaceTextureBinder() const 134{ 135 return mSurfaceTexture->asBinder(); 136} 137 138status_t Layer::setBuffers( uint32_t w, uint32_t h, 139 PixelFormat format, uint32_t flags) 140{ 141 // this surfaces pixel format 142 PixelFormatInfo info; 143 status_t err = getPixelFormatInfo(format, &info); 144 if (err) return err; 145 146 // the display's pixel format 147 const DisplayHardware& hw(graphicPlane(0).displayHardware()); 148 uint32_t const maxSurfaceDims = min( 149 hw.getMaxTextureSize(), hw.getMaxViewportDims()); 150 151 // never allow a surface larger than what our underlying GL implementation 152 // can handle. 153 if ((uint32_t(w)>maxSurfaceDims) || (uint32_t(h)>maxSurfaceDims)) { 154 return BAD_VALUE; 155 } 156 157 PixelFormatInfo displayInfo; 158 getPixelFormatInfo(hw.getFormat(), &displayInfo); 159 const uint32_t hwFlags = hw.getFlags(); 160 161 mFormat = format; 162 163 mSecure = (flags & ISurfaceComposer::eSecure) ? true : false; 164 mProtectedByApp = (flags & ISurfaceComposer::eProtectedByApp) ? true : false; 165 mOpaqueLayer = (flags & ISurfaceComposer::eOpaque); 166 mCurrentOpacity = getOpacityForFormat(format); 167 168 mSurfaceTexture->setDefaultBufferSize(w, h); 169 mSurfaceTexture->setDefaultBufferFormat(format); 170 171 // we use the red index 172 int displayRedSize = displayInfo.getSize(PixelFormatInfo::INDEX_RED); 173 int layerRedsize = info.getSize(PixelFormatInfo::INDEX_RED); 174 mNeedsDithering = layerRedsize > displayRedSize; 175 176 return NO_ERROR; 177} 178 179void Layer::setGeometry(hwc_layer_t* hwcl) 180{ 181 LayerBaseClient::setGeometry(hwcl); 182 183 hwcl->flags &= ~HWC_SKIP_LAYER; 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 } 190 191 /* 192 * Transformations are applied in this order: 193 * 1) buffer orientation/flip/mirror 194 * 2) state transformation (window manager) 195 * 3) layer orientation (screen orientation) 196 * mTransform is already the composition of (2) and (3) 197 * (NOTE: the matrices are multiplied in reverse order) 198 */ 199 200 const Transform bufferOrientation(mCurrentTransform); 201 const Transform tr(mTransform * bufferOrientation); 202 203 // this gives us only the "orientation" component of the transform 204 const uint32_t finalTransform = tr.getOrientation(); 205 206 // we can only handle simple transformation 207 if (finalTransform & Transform::ROT_INVALID) { 208 hwcl->flags = HWC_SKIP_LAYER; 209 } else { 210 hwcl->transform = finalTransform; 211 } 212 213 if (isCropped()) { 214 hwcl->sourceCrop.left = mCurrentCrop.left; 215 hwcl->sourceCrop.top = mCurrentCrop.top; 216 hwcl->sourceCrop.right = mCurrentCrop.right; 217 hwcl->sourceCrop.bottom = mCurrentCrop.bottom; 218 } else { 219 const sp<GraphicBuffer>& buffer(mActiveBuffer); 220 hwcl->sourceCrop.left = 0; 221 hwcl->sourceCrop.top = 0; 222 if (buffer != NULL) { 223 hwcl->sourceCrop.right = buffer->width; 224 hwcl->sourceCrop.bottom = buffer->height; 225 } else { 226 hwcl->sourceCrop.right = mTransformedBounds.width(); 227 hwcl->sourceCrop.bottom = mTransformedBounds.height(); 228 } 229 } 230} 231 232void Layer::setPerFrameData(hwc_layer_t* hwcl) { 233 const sp<GraphicBuffer>& buffer(mActiveBuffer); 234 if (buffer == NULL) { 235 // this can happen if the client never drew into this layer yet, 236 // or if we ran out of memory. In that case, don't let 237 // HWC handle it. 238 hwcl->flags |= HWC_SKIP_LAYER; 239 hwcl->handle = NULL; 240 } else { 241 hwcl->handle = buffer->handle; 242 } 243} 244 245void Layer::onDraw(const Region& clip) const 246{ 247 if (CC_UNLIKELY(mActiveBuffer == 0)) { 248 // the texture has not been created yet, this Layer has 249 // in fact never been drawn into. This happens frequently with 250 // SurfaceView because the WindowManager can't know when the client 251 // has drawn the first time. 252 253 // If there is nothing under us, we paint the screen in black, otherwise 254 // we just skip this update. 255 256 // figure out if there is something below us 257 Region under; 258 const SurfaceFlinger::LayerVector& drawingLayers( 259 mFlinger->mDrawingState.layersSortedByZ); 260 const size_t count = drawingLayers.size(); 261 for (size_t i=0 ; i<count ; ++i) { 262 const sp<LayerBase>& layer(drawingLayers[i]); 263 if (layer.get() == static_cast<LayerBase const*>(this)) 264 break; 265 under.orSelf(layer->visibleRegionScreen); 266 } 267 // if not everything below us is covered, we plug the holes! 268 Region holes(clip.subtract(under)); 269 if (!holes.isEmpty()) { 270 clearWithOpenGL(holes, 0, 0, 0, 1); 271 } 272 return; 273 } 274 275 if (!isProtected()) { 276 glBindTexture(GL_TEXTURE_EXTERNAL_OES, mTextureName); 277 GLenum filter = GL_NEAREST; 278 if (getFiltering() || needsFiltering() || isFixedSize() || isCropped()) { 279 // TODO: we could be more subtle with isFixedSize() 280 filter = GL_LINEAR; 281 } 282 glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MAG_FILTER, filter); 283 glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MIN_FILTER, filter); 284 glMatrixMode(GL_TEXTURE); 285 glLoadMatrixf(mTextureMatrix); 286 glMatrixMode(GL_MODELVIEW); 287 glEnable(GL_TEXTURE_EXTERNAL_OES); 288 glDisable(GL_TEXTURE_2D); 289 } else { 290 glBindTexture(GL_TEXTURE_2D, mFlinger->getProtectedTexName()); 291 glMatrixMode(GL_TEXTURE); 292 glLoadIdentity(); 293 glMatrixMode(GL_MODELVIEW); 294 glDisable(GL_TEXTURE_EXTERNAL_OES); 295 glEnable(GL_TEXTURE_2D); 296 } 297 298 drawWithOpenGL(clip); 299 300 glDisable(GL_TEXTURE_EXTERNAL_OES); 301 glDisable(GL_TEXTURE_2D); 302} 303 304// As documented in libhardware header, formats in the range 305// 0x100 - 0x1FF are specific to the HAL implementation, and 306// are known to have no alpha channel 307// TODO: move definition for device-specific range into 308// hardware.h, instead of using hard-coded values here. 309#define HARDWARE_IS_DEVICE_FORMAT(f) ((f) >= 0x100 && (f) <= 0x1FF) 310 311bool Layer::getOpacityForFormat(uint32_t format) 312{ 313 if (HARDWARE_IS_DEVICE_FORMAT(format)) { 314 return true; 315 } 316 PixelFormatInfo info; 317 status_t err = getPixelFormatInfo(PixelFormat(format), &info); 318 // in case of error (unknown format), we assume no blending 319 return (err || info.h_alpha <= info.l_alpha); 320} 321 322 323bool Layer::isOpaque() const 324{ 325 // if we don't have a buffer yet, we're translucent regardless of the 326 // layer's opaque flag. 327 if (mActiveBuffer == 0) { 328 return false; 329 } 330 331 // if the layer has the opaque flag, then we're always opaque, 332 // otherwise we use the current buffer's format. 333 return mOpaqueLayer || mCurrentOpacity; 334} 335 336bool Layer::isProtected() const 337{ 338 const sp<GraphicBuffer>& activeBuffer(mActiveBuffer); 339 return (activeBuffer != 0) && 340 (activeBuffer->getUsage() & GRALLOC_USAGE_PROTECTED); 341} 342 343uint32_t Layer::doTransaction(uint32_t flags) 344{ 345 const Layer::State& front(drawingState()); 346 const Layer::State& temp(currentState()); 347 348 const bool sizeChanged = (front.requested_w != temp.requested_w) || 349 (front.requested_h != temp.requested_h); 350 351 if (sizeChanged) { 352 // the size changed, we need to ask our client to request a new buffer 353 LOGD_IF(DEBUG_RESIZE, 354 "doTransaction: " 355 "resize (layer=%p), requested (%dx%d), drawing (%d,%d), " 356 "scalingMode=%d", 357 this, 358 int(temp.requested_w), int(temp.requested_h), 359 int(front.requested_w), int(front.requested_h), 360 mCurrentScalingMode); 361 362 if (!isFixedSize()) { 363 // we're being resized and there is a freeze display request, 364 // acquire a freeze lock, so that the screen stays put 365 // until we've redrawn at the new size; this is to avoid 366 // glitches upon orientation changes. 367 if (mFlinger->hasFreezeRequest()) { 368 // if the surface is hidden, don't try to acquire the 369 // freeze lock, since hidden surfaces may never redraw 370 if (!(front.flags & ISurfaceComposer::eLayerHidden)) { 371 mFreezeLock = mFlinger->getFreezeLock(); 372 } 373 } 374 375 // this will make sure LayerBase::doTransaction doesn't update 376 // the drawing state's size 377 Layer::State& editDraw(mDrawingState); 378 editDraw.requested_w = temp.requested_w; 379 editDraw.requested_h = temp.requested_h; 380 } 381 382 // record the new size, form this point on, when the client request 383 // a buffer, it'll get the new size. 384 mSurfaceTexture->setDefaultBufferSize(temp.requested_w, 385 temp.requested_h); 386 } 387 388 if (temp.sequence != front.sequence) { 389 if (temp.flags & ISurfaceComposer::eLayerHidden || temp.alpha == 0) { 390 // this surface is now hidden, so it shouldn't hold a freeze lock 391 // (it may never redraw, which is fine if it is hidden) 392 mFreezeLock.clear(); 393 } 394 } 395 396 return LayerBase::doTransaction(flags); 397} 398 399bool Layer::isFixedSize() const { 400 return mCurrentScalingMode != NATIVE_WINDOW_SCALING_MODE_FREEZE; 401} 402 403bool Layer::isCropped() const { 404 return !mCurrentCrop.isEmpty(); 405} 406 407// ---------------------------------------------------------------------------- 408// pageflip handling... 409// ---------------------------------------------------------------------------- 410 411void Layer::lockPageFlip(bool& recomputeVisibleRegions) 412{ 413 if (mQueuedFrames > 0) { 414 // Capture the old state of the layer for comparisons later 415 const bool oldOpacity = isOpaque(); 416 sp<GraphicBuffer> oldActiveBuffer = mActiveBuffer; 417 418 // signal another event if we have more frames pending 419 if (android_atomic_dec(&mQueuedFrames) > 1) { 420 mFlinger->signalEvent(); 421 } 422 423 if (mSurfaceTexture->updateTexImage() < NO_ERROR) { 424 // something happened! 425 recomputeVisibleRegions = true; 426 return; 427 } 428 429 // update the active buffer 430 mActiveBuffer = mSurfaceTexture->getCurrentBuffer(); 431 432 const Rect crop(mSurfaceTexture->getCurrentCrop()); 433 const uint32_t transform(mSurfaceTexture->getCurrentTransform()); 434 const uint32_t scalingMode(mSurfaceTexture->getCurrentScalingMode()); 435 if ((crop != mCurrentCrop) || 436 (transform != mCurrentTransform) || 437 (scalingMode != mCurrentScalingMode)) 438 { 439 mCurrentCrop = crop; 440 mCurrentTransform = transform; 441 mCurrentScalingMode = scalingMode; 442 mFlinger->invalidateHwcGeometry(); 443 } 444 445 GLfloat textureMatrix[16]; 446 mSurfaceTexture->getTransformMatrix(textureMatrix); 447 if (memcmp(textureMatrix, mTextureMatrix, sizeof(textureMatrix))) { 448 memcpy(mTextureMatrix, textureMatrix, sizeof(textureMatrix)); 449 mFlinger->invalidateHwcGeometry(); 450 } 451 452 uint32_t bufWidth = mActiveBuffer->getWidth(); 453 uint32_t bufHeight = mActiveBuffer->getHeight(); 454 if (oldActiveBuffer != NULL) { 455 if (bufWidth != uint32_t(oldActiveBuffer->width) || 456 bufHeight != uint32_t(oldActiveBuffer->height)) { 457 mFlinger->invalidateHwcGeometry(); 458 } 459 } 460 461 mCurrentOpacity = getOpacityForFormat(mActiveBuffer->format); 462 if (oldOpacity != isOpaque()) { 463 recomputeVisibleRegions = true; 464 } 465 466 glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 467 glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 468 469 // update the layer size and release freeze-lock 470 const Layer::State& front(drawingState()); 471 472 // FIXME: mPostedDirtyRegion = dirty & bounds 473 mPostedDirtyRegion.set(front.w, front.h); 474 475 if ((front.w != front.requested_w) || 476 (front.h != front.requested_h)) 477 { 478 // check that we received a buffer of the right size 479 // (Take the buffer's orientation into account) 480 if (mCurrentTransform & Transform::ROT_90) { 481 swap(bufWidth, bufHeight); 482 } 483 484 if (isFixedSize() || 485 (bufWidth == front.requested_w && 486 bufHeight == front.requested_h)) 487 { 488 // Here we pretend the transaction happened by updating the 489 // current and drawing states. Drawing state is only accessed 490 // in this thread, no need to have it locked 491 Layer::State& editDraw(mDrawingState); 492 editDraw.w = editDraw.requested_w; 493 editDraw.h = editDraw.requested_h; 494 495 // We also need to update the current state so that we don't 496 // end-up doing too much work during the next transaction. 497 // NOTE: We actually don't need hold the transaction lock here 498 // because State::w and State::h are only accessed from 499 // this thread 500 Layer::State& editTemp(currentState()); 501 editTemp.w = editDraw.w; 502 editTemp.h = editDraw.h; 503 504 // recompute visible region 505 recomputeVisibleRegions = true; 506 507 // we now have the correct size, unfreeze the screen 508 mFreezeLock.clear(); 509 } 510 511 LOGD_IF(DEBUG_RESIZE, 512 "lockPageFlip : " 513 " (layer=%p), buffer (%ux%u, tr=%02x), " 514 "requested (%dx%d)", 515 this, 516 bufWidth, bufHeight, mCurrentTransform, 517 front.requested_w, front.requested_h); 518 } 519 } 520} 521 522void Layer::unlockPageFlip( 523 const Transform& planeTransform, Region& outDirtyRegion) 524{ 525 Region dirtyRegion(mPostedDirtyRegion); 526 if (!dirtyRegion.isEmpty()) { 527 mPostedDirtyRegion.clear(); 528 // The dirty region is given in the layer's coordinate space 529 // transform the dirty region by the surface's transformation 530 // and the global transformation. 531 const Layer::State& s(drawingState()); 532 const Transform tr(planeTransform * s.transform); 533 dirtyRegion = tr.transform(dirtyRegion); 534 535 // At this point, the dirty region is in screen space. 536 // Make sure it's constrained by the visible region (which 537 // is in screen space as well). 538 dirtyRegion.andSelf(visibleRegionScreen); 539 outDirtyRegion.orSelf(dirtyRegion); 540 } 541 if (visibleRegionScreen.isEmpty()) { 542 // an invisible layer should not hold a freeze-lock 543 // (because it may never be updated and therefore never release it) 544 mFreezeLock.clear(); 545 } 546} 547 548void Layer::dump(String8& result, char* buffer, size_t SIZE) const 549{ 550 LayerBaseClient::dump(result, buffer, SIZE); 551 552 sp<const GraphicBuffer> buf0(mActiveBuffer); 553 uint32_t w0=0, h0=0, s0=0, f0=0; 554 if (buf0 != 0) { 555 w0 = buf0->getWidth(); 556 h0 = buf0->getHeight(); 557 s0 = buf0->getStride(); 558 f0 = buf0->format; 559 } 560 snprintf(buffer, SIZE, 561 " " 562 "format=%2d, activeBuffer=[%4ux%4u:%4u,%3X]," 563 " freezeLock=%p, transform-hint=0x%02x, queued-frames=%d\n", 564 mFormat, w0, h0, s0,f0, 565 getFreezeLock().get(), getTransformHint(), mQueuedFrames); 566 567 result.append(buffer); 568 569 if (mSurfaceTexture != 0) { 570 mSurfaceTexture->dump(result, " ", buffer, SIZE); 571 } 572} 573 574uint32_t Layer::getEffectiveUsage(uint32_t usage) const 575{ 576 // TODO: should we do something special if mSecure is set? 577 if (mProtectedByApp) { 578 // need a hardware-protected path to external video sink 579 usage |= GraphicBuffer::USAGE_PROTECTED; 580 } 581 usage |= GraphicBuffer::USAGE_HW_COMPOSER; 582 return usage; 583} 584 585uint32_t Layer::getTransformHint() const { 586 uint32_t orientation = 0; 587 if (!mFlinger->mDebugDisableTransformHint) { 588 orientation = getPlaneOrientation(); 589 if (orientation & Transform::ROT_INVALID) { 590 orientation = 0; 591 } 592 } 593 return orientation; 594} 595 596// --------------------------------------------------------------------------- 597 598 599}; // namespace android 600