Layer.cpp revision e8696a40e09b24b634214684d18526187b316a2f
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 mFrameLatencyNeeded = false; 68 mFrameLatencyOffset = 0; 69 for (int i = 0; i < 128; i++) { 70 mFrameLatencies[i] = 0; 71 } 72} 73 74void Layer::onLayerDisplayed() { 75 if (mFrameLatencyNeeded) { 76 int64_t now = systemTime(SYSTEM_TIME_MONOTONIC); 77 mFrameLatencies[mFrameLatencyOffset] = now - 78 mSurfaceTexture->getTimestamp(); 79 mFrameLatencyOffset = (mFrameLatencyOffset + 1) % 128; 80 mFrameLatencyNeeded = false; 81 } 82} 83 84void Layer::onFirstRef() 85{ 86 LayerBaseClient::onFirstRef(); 87 88 struct FrameQueuedListener : public SurfaceTexture::FrameAvailableListener { 89 FrameQueuedListener(Layer* layer) : mLayer(layer) { } 90 private: 91 wp<Layer> mLayer; 92 virtual void onFrameAvailable() { 93 sp<Layer> that(mLayer.promote()); 94 if (that != 0) { 95 that->onFrameQueued(); 96 } 97 } 98 }; 99 mSurfaceTexture = new SurfaceTextureLayer(mTextureName, this); 100 mSurfaceTexture->setFrameAvailableListener(new FrameQueuedListener(this)); 101 mSurfaceTexture->setSynchronousMode(true); 102 mSurfaceTexture->setBufferCountServer(2); 103} 104 105Layer::~Layer() 106{ 107 mFlinger->postMessageAsync( 108 new SurfaceFlinger::MessageDestroyGLTexture(mTextureName) ); 109} 110 111void Layer::onFrameQueued() { 112 android_atomic_inc(&mQueuedFrames); 113 mFlinger->signalEvent(); 114} 115 116// called with SurfaceFlinger::mStateLock as soon as the layer is entered 117// in the purgatory list 118void Layer::onRemoved() 119{ 120 mSurfaceTexture->abandon(); 121} 122 123void Layer::setName(const String8& name) { 124 LayerBase::setName(name); 125 mSurfaceTexture->setName(name); 126} 127 128sp<ISurface> Layer::createSurface() 129{ 130 class BSurface : public BnSurface, public LayerCleaner { 131 wp<const Layer> mOwner; 132 virtual sp<ISurfaceTexture> getSurfaceTexture() const { 133 sp<ISurfaceTexture> res; 134 sp<const Layer> that( mOwner.promote() ); 135 if (that != NULL) { 136 res = that->mSurfaceTexture; 137 } 138 return res; 139 } 140 public: 141 BSurface(const sp<SurfaceFlinger>& flinger, 142 const sp<Layer>& layer) 143 : LayerCleaner(flinger, layer), mOwner(layer) { } 144 }; 145 sp<ISurface> sur(new BSurface(mFlinger, this)); 146 return sur; 147} 148 149wp<IBinder> Layer::getSurfaceTextureBinder() const 150{ 151 return mSurfaceTexture->asBinder(); 152} 153 154status_t Layer::setBuffers( uint32_t w, uint32_t h, 155 PixelFormat format, uint32_t flags) 156{ 157 // this surfaces pixel format 158 PixelFormatInfo info; 159 status_t err = getPixelFormatInfo(format, &info); 160 if (err) return err; 161 162 // the display's pixel format 163 const DisplayHardware& hw(graphicPlane(0).displayHardware()); 164 uint32_t const maxSurfaceDims = min( 165 hw.getMaxTextureSize(), hw.getMaxViewportDims()); 166 167 // never allow a surface larger than what our underlying GL implementation 168 // can handle. 169 if ((uint32_t(w)>maxSurfaceDims) || (uint32_t(h)>maxSurfaceDims)) { 170 return BAD_VALUE; 171 } 172 173 PixelFormatInfo displayInfo; 174 getPixelFormatInfo(hw.getFormat(), &displayInfo); 175 const uint32_t hwFlags = hw.getFlags(); 176 177 mFormat = format; 178 179 mSecure = (flags & ISurfaceComposer::eSecure) ? true : false; 180 mProtectedByApp = (flags & ISurfaceComposer::eProtectedByApp) ? true : false; 181 mOpaqueLayer = (flags & ISurfaceComposer::eOpaque); 182 mCurrentOpacity = getOpacityForFormat(format); 183 184 mSurfaceTexture->setDefaultBufferSize(w, h); 185 mSurfaceTexture->setDefaultBufferFormat(format); 186 187 // we use the red index 188 int displayRedSize = displayInfo.getSize(PixelFormatInfo::INDEX_RED); 189 int layerRedsize = info.getSize(PixelFormatInfo::INDEX_RED); 190 mNeedsDithering = layerRedsize > displayRedSize; 191 192 return NO_ERROR; 193} 194 195void Layer::setGeometry(hwc_layer_t* hwcl) 196{ 197 LayerBaseClient::setGeometry(hwcl); 198 199 hwcl->flags &= ~HWC_SKIP_LAYER; 200 201 // we can't do alpha-fade with the hwc HAL 202 const State& s(drawingState()); 203 if (s.alpha < 0xFF) { 204 hwcl->flags = HWC_SKIP_LAYER; 205 } 206 207 /* 208 * Transformations are applied in this order: 209 * 1) buffer orientation/flip/mirror 210 * 2) state transformation (window manager) 211 * 3) layer orientation (screen orientation) 212 * mTransform is already the composition of (2) and (3) 213 * (NOTE: the matrices are multiplied in reverse order) 214 */ 215 216 const Transform bufferOrientation(mCurrentTransform); 217 const Transform tr(mTransform * bufferOrientation); 218 219 // this gives us only the "orientation" component of the transform 220 const uint32_t finalTransform = tr.getOrientation(); 221 222 // we can only handle simple transformation 223 if (finalTransform & Transform::ROT_INVALID) { 224 hwcl->flags = HWC_SKIP_LAYER; 225 } else { 226 hwcl->transform = finalTransform; 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 const sp<GraphicBuffer>& buffer(mActiveBuffer); 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 248void Layer::setPerFrameData(hwc_layer_t* hwcl) { 249 const sp<GraphicBuffer>& buffer(mActiveBuffer); 250 if (buffer == NULL) { 251 // this can happen if the client never drew into this layer yet, 252 // or if we ran out of memory. In that case, don't let 253 // HWC handle it. 254 hwcl->flags |= HWC_SKIP_LAYER; 255 hwcl->handle = NULL; 256 } else { 257 hwcl->handle = buffer->handle; 258 } 259} 260 261void Layer::onDraw(const Region& clip) const 262{ 263 if (CC_UNLIKELY(mActiveBuffer == 0)) { 264 // the texture has not been created yet, this Layer has 265 // in fact never been drawn into. This happens frequently with 266 // SurfaceView because the WindowManager can't know when the client 267 // has drawn the first time. 268 269 // If there is nothing under us, we paint the screen in black, otherwise 270 // we just skip this update. 271 272 // figure out if there is something below us 273 Region under; 274 const SurfaceFlinger::LayerVector& drawingLayers( 275 mFlinger->mDrawingState.layersSortedByZ); 276 const size_t count = drawingLayers.size(); 277 for (size_t i=0 ; i<count ; ++i) { 278 const sp<LayerBase>& layer(drawingLayers[i]); 279 if (layer.get() == static_cast<LayerBase const*>(this)) 280 break; 281 under.orSelf(layer->visibleRegionScreen); 282 } 283 // if not everything below us is covered, we plug the holes! 284 Region holes(clip.subtract(under)); 285 if (!holes.isEmpty()) { 286 clearWithOpenGL(holes, 0, 0, 0, 1); 287 } 288 return; 289 } 290 291 if (!isProtected()) { 292 glBindTexture(GL_TEXTURE_EXTERNAL_OES, mTextureName); 293 GLenum filter = GL_NEAREST; 294 if (getFiltering() || needsFiltering() || isFixedSize() || isCropped()) { 295 // TODO: we could be more subtle with isFixedSize() 296 filter = GL_LINEAR; 297 } 298 glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MAG_FILTER, filter); 299 glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MIN_FILTER, filter); 300 glMatrixMode(GL_TEXTURE); 301 glLoadMatrixf(mTextureMatrix); 302 glMatrixMode(GL_MODELVIEW); 303 glDisable(GL_TEXTURE_2D); 304 glEnable(GL_TEXTURE_EXTERNAL_OES); 305 } else { 306 glBindTexture(GL_TEXTURE_2D, mFlinger->getProtectedTexName()); 307 glMatrixMode(GL_TEXTURE); 308 glLoadIdentity(); 309 glMatrixMode(GL_MODELVIEW); 310 glDisable(GL_TEXTURE_EXTERNAL_OES); 311 glEnable(GL_TEXTURE_2D); 312 } 313 314 drawWithOpenGL(clip); 315 316 glDisable(GL_TEXTURE_EXTERNAL_OES); 317 glDisable(GL_TEXTURE_2D); 318} 319 320// As documented in libhardware header, formats in the range 321// 0x100 - 0x1FF are specific to the HAL implementation, and 322// are known to have no alpha channel 323// TODO: move definition for device-specific range into 324// hardware.h, instead of using hard-coded values here. 325#define HARDWARE_IS_DEVICE_FORMAT(f) ((f) >= 0x100 && (f) <= 0x1FF) 326 327bool Layer::getOpacityForFormat(uint32_t format) 328{ 329 if (HARDWARE_IS_DEVICE_FORMAT(format)) { 330 return true; 331 } 332 PixelFormatInfo info; 333 status_t err = getPixelFormatInfo(PixelFormat(format), &info); 334 // in case of error (unknown format), we assume no blending 335 return (err || info.h_alpha <= info.l_alpha); 336} 337 338 339bool Layer::isOpaque() const 340{ 341 // if we don't have a buffer yet, we're translucent regardless of the 342 // layer's opaque flag. 343 if (mActiveBuffer == 0) { 344 return false; 345 } 346 347 // if the layer has the opaque flag, then we're always opaque, 348 // otherwise we use the current buffer's format. 349 return mOpaqueLayer || mCurrentOpacity; 350} 351 352bool Layer::isProtected() const 353{ 354 const sp<GraphicBuffer>& activeBuffer(mActiveBuffer); 355 return (activeBuffer != 0) && 356 (activeBuffer->getUsage() & GRALLOC_USAGE_PROTECTED); 357} 358 359uint32_t Layer::doTransaction(uint32_t flags) 360{ 361 const Layer::State& front(drawingState()); 362 const Layer::State& temp(currentState()); 363 364 const bool sizeChanged = (front.requested_w != temp.requested_w) || 365 (front.requested_h != temp.requested_h); 366 367 if (sizeChanged) { 368 // the size changed, we need to ask our client to request a new buffer 369 ALOGD_IF(DEBUG_RESIZE, 370 "doTransaction: " 371 "resize (layer=%p), requested (%dx%d), drawing (%d,%d), " 372 "scalingMode=%d", 373 this, 374 int(temp.requested_w), int(temp.requested_h), 375 int(front.requested_w), int(front.requested_h), 376 mCurrentScalingMode); 377 378 if (!isFixedSize()) { 379 // this will make sure LayerBase::doTransaction doesn't update 380 // the drawing state's size 381 Layer::State& editDraw(mDrawingState); 382 editDraw.requested_w = temp.requested_w; 383 editDraw.requested_h = temp.requested_h; 384 } 385 386 // record the new size, form this point on, when the client request 387 // a buffer, it'll get the new size. 388 mSurfaceTexture->setDefaultBufferSize(temp.requested_w, 389 temp.requested_h); 390 } 391 392 return LayerBase::doTransaction(flags); 393} 394 395bool Layer::isFixedSize() const { 396 return mCurrentScalingMode != NATIVE_WINDOW_SCALING_MODE_FREEZE; 397} 398 399bool Layer::isCropped() const { 400 return !mCurrentCrop.isEmpty(); 401} 402 403// ---------------------------------------------------------------------------- 404// pageflip handling... 405// ---------------------------------------------------------------------------- 406 407void Layer::lockPageFlip(bool& recomputeVisibleRegions) 408{ 409 if (mQueuedFrames > 0) { 410 // Capture the old state of the layer for comparisons later 411 const bool oldOpacity = isOpaque(); 412 sp<GraphicBuffer> oldActiveBuffer = mActiveBuffer; 413 414 // signal another event if we have more frames pending 415 if (android_atomic_dec(&mQueuedFrames) > 1) { 416 mFlinger->signalEvent(); 417 } 418 419 if (mSurfaceTexture->updateTexImage() < NO_ERROR) { 420 // something happened! 421 recomputeVisibleRegions = true; 422 return; 423 } 424 425 // update the active buffer 426 mActiveBuffer = mSurfaceTexture->getCurrentBuffer(); 427 mFrameLatencyNeeded = true; 428 429 const Rect crop(mSurfaceTexture->getCurrentCrop()); 430 const uint32_t transform(mSurfaceTexture->getCurrentTransform()); 431 const uint32_t scalingMode(mSurfaceTexture->getCurrentScalingMode()); 432 if ((crop != mCurrentCrop) || 433 (transform != mCurrentTransform) || 434 (scalingMode != mCurrentScalingMode)) 435 { 436 mCurrentCrop = crop; 437 mCurrentTransform = transform; 438 mCurrentScalingMode = scalingMode; 439 mFlinger->invalidateHwcGeometry(); 440 } 441 442 GLfloat textureMatrix[16]; 443 mSurfaceTexture->getTransformMatrix(textureMatrix); 444 if (memcmp(textureMatrix, mTextureMatrix, sizeof(textureMatrix))) { 445 memcpy(mTextureMatrix, textureMatrix, sizeof(textureMatrix)); 446 mFlinger->invalidateHwcGeometry(); 447 } 448 449 uint32_t bufWidth = mActiveBuffer->getWidth(); 450 uint32_t bufHeight = mActiveBuffer->getHeight(); 451 if (oldActiveBuffer != NULL) { 452 if (bufWidth != uint32_t(oldActiveBuffer->width) || 453 bufHeight != uint32_t(oldActiveBuffer->height)) { 454 mFlinger->invalidateHwcGeometry(); 455 } 456 } 457 458 mCurrentOpacity = getOpacityForFormat(mActiveBuffer->format); 459 if (oldOpacity != isOpaque()) { 460 recomputeVisibleRegions = true; 461 } 462 463 glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 464 glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 465 466 // update the layer size if needed 467 const Layer::State& front(drawingState()); 468 469 // FIXME: mPostedDirtyRegion = dirty & bounds 470 mPostedDirtyRegion.set(front.w, front.h); 471 472 if ((front.w != front.requested_w) || 473 (front.h != front.requested_h)) 474 { 475 // check that we received a buffer of the right size 476 // (Take the buffer's orientation into account) 477 if (mCurrentTransform & Transform::ROT_90) { 478 swap(bufWidth, bufHeight); 479 } 480 481 if (isFixedSize() || 482 (bufWidth == front.requested_w && 483 bufHeight == front.requested_h)) 484 { 485 // Here we pretend the transaction happened by updating the 486 // current and drawing states. Drawing state is only accessed 487 // in this thread, no need to have it locked 488 Layer::State& editDraw(mDrawingState); 489 editDraw.w = editDraw.requested_w; 490 editDraw.h = editDraw.requested_h; 491 492 // We also need to update the current state so that we don't 493 // end-up doing too much work during the next transaction. 494 // NOTE: We actually don't need hold the transaction lock here 495 // because State::w and State::h are only accessed from 496 // this thread 497 Layer::State& editTemp(currentState()); 498 editTemp.w = editDraw.w; 499 editTemp.h = editDraw.h; 500 501 // recompute visible region 502 recomputeVisibleRegions = true; 503 } 504 505 ALOGD_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} 536 537void Layer::dump(String8& result, char* buffer, size_t SIZE) const 538{ 539 LayerBaseClient::dump(result, buffer, SIZE); 540 541 sp<const GraphicBuffer> buf0(mActiveBuffer); 542 uint32_t w0=0, h0=0, s0=0, f0=0; 543 if (buf0 != 0) { 544 w0 = buf0->getWidth(); 545 h0 = buf0->getHeight(); 546 s0 = buf0->getStride(); 547 f0 = buf0->format; 548 } 549 snprintf(buffer, SIZE, 550 " " 551 "format=%2d, activeBuffer=[%4ux%4u:%4u,%3X]," 552 " transform-hint=0x%02x, queued-frames=%d\n", 553 mFormat, w0, h0, s0,f0, 554 getTransformHint(), mQueuedFrames); 555 556 result.append(buffer); 557 558 const int64_t* l = mFrameLatencies; 559 int o = mFrameLatencyOffset; 560 for (int i = 0; i < 128; i += 8) { 561 snprintf(buffer, SIZE, 562 " " 563 "% 12lld % 12lld % 12lld % 12lld " 564 "% 12lld % 12lld % 12lld % 12lld\n", 565 l[(o+i+0)%128], l[(o+i+1)%128], l[(o+i+2)%128], l[(o+i+3)%128], 566 l[(o+i+4)%128], l[(o+i+5)%128], l[(o+i+6)%128], l[(o+i+7)%128]); 567 result.append(buffer); 568 } 569 570 if (mSurfaceTexture != 0) { 571 mSurfaceTexture->dump(result, " ", buffer, SIZE); 572 } 573} 574 575uint32_t Layer::getEffectiveUsage(uint32_t usage) const 576{ 577 // TODO: should we do something special if mSecure is set? 578 if (mProtectedByApp) { 579 // need a hardware-protected path to external video sink 580 usage |= GraphicBuffer::USAGE_PROTECTED; 581 } 582 usage |= GraphicBuffer::USAGE_HW_COMPOSER; 583 return usage; 584} 585 586uint32_t Layer::getTransformHint() const { 587 uint32_t orientation = 0; 588 if (!mFlinger->mDebugDisableTransformHint) { 589 orientation = getPlaneOrientation(); 590 if (orientation & Transform::ROT_INVALID) { 591 orientation = 0; 592 } 593 } 594 return orientation; 595} 596 597// --------------------------------------------------------------------------- 598 599 600}; // namespace android 601