Layer.cpp revision db5230f4441fa8f120f15bdd6fcfc6e75d9c27d0
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::destroy(RefBase const* base) { 69 mFlinger->destroyLayer(static_cast<LayerBase const*>(base)); 70} 71 72void Layer::onFirstRef() 73{ 74 LayerBaseClient::onFirstRef(); 75 setDestroyer(this); 76 77 struct FrameQueuedListener : public SurfaceTexture::FrameAvailableListener { 78 FrameQueuedListener(Layer* layer) : mLayer(layer) { } 79 private: 80 wp<Layer> mLayer; 81 virtual void onFrameAvailable() { 82 sp<Layer> that(mLayer.promote()); 83 if (that != 0) { 84 that->onFrameQueued(); 85 } 86 } 87 }; 88 mSurfaceTexture = new SurfaceTextureLayer(mTextureName, this); 89 mSurfaceTexture->setFrameAvailableListener(new FrameQueuedListener(this)); 90 mSurfaceTexture->setSynchronousMode(true); 91 mSurfaceTexture->setBufferCountServer(2); 92} 93 94Layer::~Layer() 95{ 96 glDeleteTextures(1, &mTextureName); 97} 98 99void Layer::onFrameQueued() { 100 android_atomic_inc(&mQueuedFrames); 101 mFlinger->signalEvent(); 102} 103 104// called with SurfaceFlinger::mStateLock as soon as the layer is entered 105// in the purgatory list 106void Layer::onRemoved() 107{ 108} 109 110sp<ISurface> Layer::createSurface() 111{ 112 class BSurface : public BnSurface, public LayerCleaner { 113 wp<const Layer> mOwner; 114 virtual sp<ISurfaceTexture> getSurfaceTexture() const { 115 sp<ISurfaceTexture> res; 116 sp<const Layer> that( mOwner.promote() ); 117 if (that != NULL) { 118 res = that->mSurfaceTexture; 119 } 120 return res; 121 } 122 public: 123 BSurface(const sp<SurfaceFlinger>& flinger, 124 const sp<Layer>& layer) 125 : LayerCleaner(flinger, layer), mOwner(layer) { } 126 }; 127 sp<ISurface> sur(new BSurface(mFlinger, this)); 128 return sur; 129} 130 131status_t Layer::setBuffers( uint32_t w, uint32_t h, 132 PixelFormat format, uint32_t flags) 133{ 134 // this surfaces pixel format 135 PixelFormatInfo info; 136 status_t err = getPixelFormatInfo(format, &info); 137 if (err) return err; 138 139 // the display's pixel format 140 const DisplayHardware& hw(graphicPlane(0).displayHardware()); 141 uint32_t const maxSurfaceDims = min( 142 hw.getMaxTextureSize(), hw.getMaxViewportDims()); 143 144 // never allow a surface larger than what our underlying GL implementation 145 // can handle. 146 if ((uint32_t(w)>maxSurfaceDims) || (uint32_t(h)>maxSurfaceDims)) { 147 return BAD_VALUE; 148 } 149 150 PixelFormatInfo displayInfo; 151 getPixelFormatInfo(hw.getFormat(), &displayInfo); 152 const uint32_t hwFlags = hw.getFlags(); 153 154 mFormat = format; 155 156 mSecure = (flags & ISurfaceComposer::eSecure) ? true : false; 157 mProtectedByApp = (flags & ISurfaceComposer::eProtectedByApp) ? true : false; 158 mOpaqueLayer = (flags & ISurfaceComposer::eOpaque); 159 mCurrentOpacity = getOpacityForFormat(format); 160 161 mSurfaceTexture->setDefaultBufferSize(w, h); 162 mSurfaceTexture->setDefaultBufferFormat(format); 163 164 // we use the red index 165 int displayRedSize = displayInfo.getSize(PixelFormatInfo::INDEX_RED); 166 int layerRedsize = info.getSize(PixelFormatInfo::INDEX_RED); 167 mNeedsDithering = layerRedsize > displayRedSize; 168 169 return NO_ERROR; 170} 171 172void Layer::setGeometry(hwc_layer_t* hwcl) 173{ 174 hwcl->compositionType = HWC_FRAMEBUFFER; 175 hwcl->hints = 0; 176 hwcl->flags = 0; 177 hwcl->transform = 0; 178 hwcl->blending = HWC_BLENDING_NONE; 179 180 // we can't do alpha-fade with the hwc HAL 181 const State& s(drawingState()); 182 if (s.alpha < 0xFF) { 183 hwcl->flags = HWC_SKIP_LAYER; 184 return; 185 } 186 187 /* 188 * Transformations are applied in this order: 189 * 1) buffer orientation/flip/mirror 190 * 2) state transformation (window manager) 191 * 3) layer orientation (screen orientation) 192 * (NOTE: the matrices are multiplied in reverse order) 193 */ 194 195 const Transform bufferOrientation(mCurrentTransform); 196 const Transform& stateTransform(s.transform); 197 const Transform layerOrientation(mOrientation); 198 199 const Transform tr(layerOrientation * stateTransform * bufferOrientation); 200 201 // this gives us only the "orientation" component of the transform 202 const uint32_t finalTransform = tr.getOrientation(); 203 204 // we can only handle simple transformation 205 if (finalTransform & Transform::ROT_INVALID) { 206 hwcl->flags = HWC_SKIP_LAYER; 207 return; 208 } 209 210 hwcl->transform = finalTransform; 211 212 if (!isOpaque()) { 213 hwcl->blending = mPremultipliedAlpha ? 214 HWC_BLENDING_PREMULT : HWC_BLENDING_COVERAGE; 215 } 216 217 // scaling is already applied in mTransformedBounds 218 hwcl->displayFrame.left = mTransformedBounds.left; 219 hwcl->displayFrame.top = mTransformedBounds.top; 220 hwcl->displayFrame.right = mTransformedBounds.right; 221 hwcl->displayFrame.bottom = mTransformedBounds.bottom; 222 223 hwcl->visibleRegionScreen.rects = 224 reinterpret_cast<hwc_rect_t const *>( 225 visibleRegionScreen.getArray( 226 &hwcl->visibleRegionScreen.numRects)); 227} 228 229void Layer::setPerFrameData(hwc_layer_t* hwcl) { 230 const sp<GraphicBuffer>& buffer(mActiveBuffer); 231 if (buffer == NULL) { 232 // this can happen if the client never drew into this layer yet, 233 // or if we ran out of memory. In that case, don't let 234 // HWC handle it. 235 hwcl->flags |= HWC_SKIP_LAYER; 236 hwcl->handle = NULL; 237 return; 238 } 239 hwcl->handle = buffer->handle; 240 241 if (isCropped()) { 242 hwcl->sourceCrop.left = mCurrentCrop.left; 243 hwcl->sourceCrop.top = mCurrentCrop.top; 244 hwcl->sourceCrop.right = mCurrentCrop.right; 245 hwcl->sourceCrop.bottom = mCurrentCrop.bottom; 246 } else { 247 hwcl->sourceCrop.left = 0; 248 hwcl->sourceCrop.top = 0; 249 hwcl->sourceCrop.right = buffer->width; 250 hwcl->sourceCrop.bottom = buffer->height; 251 } 252} 253 254static inline uint16_t pack565(int r, int g, int b) { 255 return (r<<11)|(g<<5)|b; 256} 257void Layer::onDraw(const Region& clip) const 258{ 259 if (CC_UNLIKELY(mActiveBuffer == 0)) { 260 // the texture has not been created yet, this Layer has 261 // in fact never been drawn into. This happens frequently with 262 // SurfaceView because the WindowManager can't know when the client 263 // has drawn the first time. 264 265 // If there is nothing under us, we paint the screen in black, otherwise 266 // we just skip this update. 267 268 // figure out if there is something below us 269 Region under; 270 const SurfaceFlinger::LayerVector& drawingLayers(mFlinger->mDrawingState.layersSortedByZ); 271 const size_t count = drawingLayers.size(); 272 for (size_t i=0 ; i<count ; ++i) { 273 const sp<LayerBase>& layer(drawingLayers[i]); 274 if (layer.get() == static_cast<LayerBase const*>(this)) 275 break; 276 under.orSelf(layer->visibleRegionScreen); 277 } 278 // if not everything below us is covered, we plug the holes! 279 Region holes(clip.subtract(under)); 280 if (!holes.isEmpty()) { 281 clearWithOpenGL(holes, 0, 0, 0, 1); 282 } 283 return; 284 } 285 286 GLenum target = mSurfaceTexture->getCurrentTextureTarget(); 287 glBindTexture(target, mTextureName); 288 if (getFiltering() || needsFiltering() || isFixedSize() || isCropped()) { 289 // TODO: we could be more subtle with isFixedSize() 290 glTexParameterx(target, GL_TEXTURE_MAG_FILTER, GL_LINEAR); 291 glTexParameterx(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR); 292 } else { 293 glTexParameterx(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST); 294 glTexParameterx(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 295 } 296 glEnable(target); 297 glMatrixMode(GL_TEXTURE); 298 glLoadMatrixf(mTextureMatrix); 299 glMatrixMode(GL_MODELVIEW); 300 301 drawWithOpenGL(clip); 302 303 glDisable(target); 304} 305 306// As documented in libhardware header, formats in the range 307// 0x100 - 0x1FF are specific to the HAL implementation, and 308// are known to have no alpha channel 309// TODO: move definition for device-specific range into 310// hardware.h, instead of using hard-coded values here. 311#define HARDWARE_IS_DEVICE_FORMAT(f) ((f) >= 0x100 && (f) <= 0x1FF) 312 313bool Layer::getOpacityForFormat(uint32_t format) 314{ 315 if (HARDWARE_IS_DEVICE_FORMAT(format)) { 316 return true; 317 } 318 PixelFormatInfo info; 319 status_t err = getPixelFormatInfo(PixelFormat(format), &info); 320 // in case of error (unknown format), we assume no blending 321 return (err || info.h_alpha <= info.l_alpha); 322} 323 324 325bool Layer::isOpaque() const 326{ 327 // if we don't have a buffer yet, we're translucent regardless of the 328 // layer's opaque flag. 329 if (mActiveBuffer == 0) { 330 return false; 331 } 332 333 // if the layer has the opaque flag, then we're always opaque, 334 // otherwise we use the current buffer's format. 335 return mOpaqueLayer || mCurrentOpacity; 336} 337 338bool Layer::isProtected() const 339{ 340 const sp<GraphicBuffer>& activeBuffer(mActiveBuffer); 341 return (activeBuffer != 0) && 342 (activeBuffer->getUsage() & GRALLOC_USAGE_PROTECTED); 343} 344 345uint32_t Layer::doTransaction(uint32_t flags) 346{ 347 const Layer::State& front(drawingState()); 348 const Layer::State& temp(currentState()); 349 350 const bool sizeChanged = (front.requested_w != temp.requested_w) || 351 (front.requested_h != temp.requested_h); 352 353 if (sizeChanged) { 354 // the size changed, we need to ask our client to request a new buffer 355 LOGD_IF(DEBUG_RESIZE, 356 "doTransaction: " 357 "resize (layer=%p), requested (%dx%d), drawing (%d,%d), " 358 "scalingMode=%d", 359 this, 360 int(temp.requested_w), int(temp.requested_h), 361 int(front.requested_w), int(front.requested_h), 362 mCurrentScalingMode); 363 364 if (!isFixedSize()) { 365 // we're being resized and there is a freeze display request, 366 // acquire a freeze lock, so that the screen stays put 367 // until we've redrawn at the new size; this is to avoid 368 // glitches upon orientation changes. 369 if (mFlinger->hasFreezeRequest()) { 370 // if the surface is hidden, don't try to acquire the 371 // freeze lock, since hidden surfaces may never redraw 372 if (!(front.flags & ISurfaceComposer::eLayerHidden)) { 373 mFreezeLock = mFlinger->getFreezeLock(); 374 } 375 } 376 377 // this will make sure LayerBase::doTransaction doesn't update 378 // the drawing state's size 379 Layer::State& editDraw(mDrawingState); 380 editDraw.requested_w = temp.requested_w; 381 editDraw.requested_h = temp.requested_h; 382 383 // record the new size, form this point on, when the client request 384 // a buffer, it'll get the new size. 385 mSurfaceTexture->setDefaultBufferSize(temp.requested_w, temp.requested_h); 386 } 387 } 388 389 if (temp.sequence != front.sequence) { 390 if (temp.flags & ISurfaceComposer::eLayerHidden || temp.alpha == 0) { 391 // this surface is now hidden, so it shouldn't hold a freeze lock 392 // (it may never redraw, which is fine if it is hidden) 393 mFreezeLock.clear(); 394 } 395 } 396 397 return LayerBase::doTransaction(flags); 398} 399 400bool Layer::isFixedSize() const { 401 return mCurrentScalingMode != NATIVE_WINDOW_SCALING_MODE_FREEZE; 402} 403 404bool Layer::isCropped() const { 405 return !mCurrentCrop.isEmpty(); 406} 407 408// ---------------------------------------------------------------------------- 409// pageflip handling... 410// ---------------------------------------------------------------------------- 411 412void Layer::lockPageFlip(bool& recomputeVisibleRegions) 413{ 414 if (mQueuedFrames > 0) { 415 const bool oldOpacity = isOpaque(); 416 417 // signal another event if we have more frames pending 418 if (android_atomic_dec(&mQueuedFrames) > 1) { 419 mFlinger->signalEvent(); 420 } 421 422 if (mSurfaceTexture->updateTexImage() < NO_ERROR) { 423 // something happened! 424 recomputeVisibleRegions = true; 425 return; 426 } 427 428 mActiveBuffer = mSurfaceTexture->getCurrentBuffer(); 429 mSurfaceTexture->getTransformMatrix(mTextureMatrix); 430 431 const Rect crop(mSurfaceTexture->getCurrentCrop()); 432 const uint32_t transform(mSurfaceTexture->getCurrentTransform()); 433 const uint32_t scalingMode(mSurfaceTexture->getCurrentScalingMode()); 434 if ((crop != mCurrentCrop) || 435 (transform != mCurrentTransform) || 436 (scalingMode != mCurrentScalingMode)) 437 { 438 mCurrentCrop = crop; 439 mCurrentTransform = transform; 440 mCurrentScalingMode = scalingMode; 441 mFlinger->invalidateHwcGeometry(); 442 } 443 444 mCurrentOpacity = getOpacityForFormat(mActiveBuffer->format); 445 if (oldOpacity != isOpaque()) { 446 recomputeVisibleRegions = true; 447 } 448 449 const GLenum target(mSurfaceTexture->getCurrentTextureTarget()); 450 glTexParameterx(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 451 glTexParameterx(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 452 453 // update the layer size and release freeze-lock 454 const Layer::State& front(drawingState()); 455 456 // FIXME: mPostedDirtyRegion = dirty & bounds 457 mPostedDirtyRegion.set(front.w, front.h); 458 459 460 if ((front.w != front.requested_w) || 461 (front.h != front.requested_h)) 462 { 463 // check that we received a buffer of the right size 464 // (Take the buffer's orientation into account) 465 sp<GraphicBuffer> newFrontBuffer(mActiveBuffer); 466 uint32_t bufWidth = newFrontBuffer->getWidth(); 467 uint32_t bufHeight = newFrontBuffer->getHeight(); 468 if (mCurrentTransform & Transform::ROT_90) { 469 swap(bufWidth, bufHeight); 470 } 471 472 if (isFixedSize() || 473 (bufWidth == front.requested_w && 474 bufHeight == front.requested_h)) 475 { 476 // Here we pretend the transaction happened by updating the 477 // current and drawing states. Drawing state is only accessed 478 // in this thread, no need to have it locked 479 Layer::State& editDraw(mDrawingState); 480 editDraw.w = editDraw.requested_w; 481 editDraw.h = editDraw.requested_h; 482 483 // We also need to update the current state so that we don't 484 // end-up doing too much work during the next transaction. 485 // NOTE: We actually don't need hold the transaction lock here 486 // because State::w and State::h are only accessed from 487 // this thread 488 Layer::State& editTemp(currentState()); 489 editTemp.w = editDraw.w; 490 editTemp.h = editDraw.h; 491 492 // recompute visible region 493 recomputeVisibleRegions = true; 494 495 // we now have the correct size, unfreeze the screen 496 mFreezeLock.clear(); 497 } 498 499 LOGD_IF(DEBUG_RESIZE, 500 "lockPageFlip : " 501 " (layer=%p), buffer (%ux%u, tr=%02x), " 502 "requested (%dx%d)", 503 this, 504 bufWidth, bufHeight, mCurrentTransform, 505 front.requested_w, front.requested_h); 506 } 507 } 508} 509 510void Layer::unlockPageFlip( 511 const Transform& planeTransform, Region& outDirtyRegion) 512{ 513 Region dirtyRegion(mPostedDirtyRegion); 514 if (!dirtyRegion.isEmpty()) { 515 mPostedDirtyRegion.clear(); 516 // The dirty region is given in the layer's coordinate space 517 // transform the dirty region by the surface's transformation 518 // and the global transformation. 519 const Layer::State& s(drawingState()); 520 const Transform tr(planeTransform * s.transform); 521 dirtyRegion = tr.transform(dirtyRegion); 522 523 // At this point, the dirty region is in screen space. 524 // Make sure it's constrained by the visible region (which 525 // is in screen space as well). 526 dirtyRegion.andSelf(visibleRegionScreen); 527 outDirtyRegion.orSelf(dirtyRegion); 528 } 529 if (visibleRegionScreen.isEmpty()) { 530 // an invisible layer should not hold a freeze-lock 531 // (because it may never be updated and therefore never release it) 532 mFreezeLock.clear(); 533 } 534} 535 536void Layer::dump(String8& result, char* buffer, size_t SIZE) const 537{ 538 LayerBaseClient::dump(result, buffer, SIZE); 539 540 sp<const GraphicBuffer> buf0(mActiveBuffer); 541 uint32_t w0=0, h0=0, s0=0, f0=0; 542 if (buf0 != 0) { 543 w0 = buf0->getWidth(); 544 h0 = buf0->getHeight(); 545 s0 = buf0->getStride(); 546 f0 = buf0->format; 547 } 548 snprintf(buffer, SIZE, 549 " " 550 "format=%2d, activeBuffer=[%3ux%3u:%3u,%3u]," 551 " freezeLock=%p, queued-frames=%d\n", 552 mFormat, w0, h0, s0,f0, 553 getFreezeLock().get(), mQueuedFrames); 554 555 result.append(buffer); 556 557 if (mSurfaceTexture != 0) { 558 mSurfaceTexture->dump(result, " ", buffer, SIZE); 559 } 560} 561 562uint32_t Layer::getEffectiveUsage(uint32_t usage) const 563{ 564 // TODO: should we do something special if mSecure is set? 565 if (mProtectedByApp) { 566 // need a hardware-protected path to external video sink 567 usage |= GraphicBuffer::USAGE_PROTECTED; 568 } 569 return usage; 570} 571 572// --------------------------------------------------------------------------- 573 574 575}; // namespace android 576