Layer.cpp revision 5ba8f366bd81348ac8b0e3a09fa122f3098b4363
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 115void Layer::setName(const String8& name) { 116 LayerBase::setName(name); 117 mSurfaceTexture->setName(name); 118} 119 120sp<ISurface> Layer::createSurface() 121{ 122 class BSurface : public BnSurface, public LayerCleaner { 123 wp<const Layer> mOwner; 124 virtual sp<ISurfaceTexture> getSurfaceTexture() const { 125 sp<ISurfaceTexture> res; 126 sp<const Layer> that( mOwner.promote() ); 127 if (that != NULL) { 128 res = that->mSurfaceTexture; 129 } 130 return res; 131 } 132 public: 133 BSurface(const sp<SurfaceFlinger>& flinger, 134 const sp<Layer>& layer) 135 : LayerCleaner(flinger, layer), mOwner(layer) { } 136 }; 137 sp<ISurface> sur(new BSurface(mFlinger, this)); 138 return sur; 139} 140 141wp<IBinder> Layer::getSurfaceTextureBinder() const 142{ 143 return mSurfaceTexture->asBinder(); 144} 145 146status_t Layer::setBuffers( uint32_t w, uint32_t h, 147 PixelFormat format, uint32_t flags) 148{ 149 // this surfaces pixel format 150 PixelFormatInfo info; 151 status_t err = getPixelFormatInfo(format, &info); 152 if (err) return err; 153 154 // the display's pixel format 155 const DisplayHardware& hw(graphicPlane(0).displayHardware()); 156 uint32_t const maxSurfaceDims = min( 157 hw.getMaxTextureSize(), hw.getMaxViewportDims()); 158 159 // never allow a surface larger than what our underlying GL implementation 160 // can handle. 161 if ((uint32_t(w)>maxSurfaceDims) || (uint32_t(h)>maxSurfaceDims)) { 162 return BAD_VALUE; 163 } 164 165 PixelFormatInfo displayInfo; 166 getPixelFormatInfo(hw.getFormat(), &displayInfo); 167 const uint32_t hwFlags = hw.getFlags(); 168 169 mFormat = format; 170 171 mSecure = (flags & ISurfaceComposer::eSecure) ? true : false; 172 mProtectedByApp = (flags & ISurfaceComposer::eProtectedByApp) ? true : false; 173 mOpaqueLayer = (flags & ISurfaceComposer::eOpaque); 174 mCurrentOpacity = getOpacityForFormat(format); 175 176 mSurfaceTexture->setDefaultBufferSize(w, h); 177 mSurfaceTexture->setDefaultBufferFormat(format); 178 179 // we use the red index 180 int displayRedSize = displayInfo.getSize(PixelFormatInfo::INDEX_RED); 181 int layerRedsize = info.getSize(PixelFormatInfo::INDEX_RED); 182 mNeedsDithering = layerRedsize > displayRedSize; 183 184 return NO_ERROR; 185} 186 187void Layer::setGeometry(hwc_layer_t* hwcl) 188{ 189 LayerBaseClient::setGeometry(hwcl); 190 191 hwcl->flags &= ~HWC_SKIP_LAYER; 192 193 // we can't do alpha-fade with the hwc HAL 194 const State& s(drawingState()); 195 if (s.alpha < 0xFF) { 196 hwcl->flags = HWC_SKIP_LAYER; 197 } 198 199 /* 200 * Transformations are applied in this order: 201 * 1) buffer orientation/flip/mirror 202 * 2) state transformation (window manager) 203 * 3) layer orientation (screen orientation) 204 * mTransform is already the composition of (2) and (3) 205 * (NOTE: the matrices are multiplied in reverse order) 206 */ 207 208 const Transform bufferOrientation(mCurrentTransform); 209 const Transform tr(mTransform * bufferOrientation); 210 211 // this gives us only the "orientation" component of the transform 212 const uint32_t finalTransform = tr.getOrientation(); 213 214 // we can only handle simple transformation 215 if (finalTransform & Transform::ROT_INVALID) { 216 hwcl->flags = HWC_SKIP_LAYER; 217 } else { 218 hwcl->transform = finalTransform; 219 } 220 221 if (isCropped()) { 222 hwcl->sourceCrop.left = mCurrentCrop.left; 223 hwcl->sourceCrop.top = mCurrentCrop.top; 224 hwcl->sourceCrop.right = mCurrentCrop.right; 225 hwcl->sourceCrop.bottom = mCurrentCrop.bottom; 226 } else { 227 const sp<GraphicBuffer>& buffer(mActiveBuffer); 228 hwcl->sourceCrop.left = 0; 229 hwcl->sourceCrop.top = 0; 230 if (buffer != NULL) { 231 hwcl->sourceCrop.right = buffer->width; 232 hwcl->sourceCrop.bottom = buffer->height; 233 } else { 234 hwcl->sourceCrop.right = mTransformedBounds.width(); 235 hwcl->sourceCrop.bottom = mTransformedBounds.height(); 236 } 237 } 238} 239 240void Layer::setPerFrameData(hwc_layer_t* hwcl) { 241 const sp<GraphicBuffer>& buffer(mActiveBuffer); 242 if (buffer == NULL) { 243 // this can happen if the client never drew into this layer yet, 244 // or if we ran out of memory. In that case, don't let 245 // HWC handle it. 246 hwcl->flags |= HWC_SKIP_LAYER; 247 hwcl->handle = NULL; 248 } else { 249 hwcl->handle = buffer->handle; 250 } 251} 252 253void Layer::onDraw(const Region& clip) const 254{ 255 if (CC_UNLIKELY(mActiveBuffer == 0)) { 256 // the texture has not been created yet, this Layer has 257 // in fact never been drawn into. This happens frequently with 258 // SurfaceView because the WindowManager can't know when the client 259 // has drawn the first time. 260 261 // If there is nothing under us, we paint the screen in black, otherwise 262 // we just skip this update. 263 264 // figure out if there is something below us 265 Region under; 266 const SurfaceFlinger::LayerVector& drawingLayers( 267 mFlinger->mDrawingState.layersSortedByZ); 268 const size_t count = drawingLayers.size(); 269 for (size_t i=0 ; i<count ; ++i) { 270 const sp<LayerBase>& layer(drawingLayers[i]); 271 if (layer.get() == static_cast<LayerBase const*>(this)) 272 break; 273 under.orSelf(layer->visibleRegionScreen); 274 } 275 // if not everything below us is covered, we plug the holes! 276 Region holes(clip.subtract(under)); 277 if (!holes.isEmpty()) { 278 clearWithOpenGL(holes, 0, 0, 0, 1); 279 } 280 return; 281 } 282 283 if (!isProtected()) { 284 glBindTexture(GL_TEXTURE_EXTERNAL_OES, mTextureName); 285 GLenum filter = GL_NEAREST; 286 if (getFiltering() || needsFiltering() || isFixedSize() || isCropped()) { 287 // TODO: we could be more subtle with isFixedSize() 288 filter = GL_LINEAR; 289 } 290 glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MAG_FILTER, filter); 291 glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MIN_FILTER, filter); 292 glMatrixMode(GL_TEXTURE); 293 glLoadMatrixf(mTextureMatrix); 294 glMatrixMode(GL_MODELVIEW); 295 glEnable(GL_TEXTURE_EXTERNAL_OES); 296 glDisable(GL_TEXTURE_2D); 297 } else { 298 glBindTexture(GL_TEXTURE_2D, mFlinger->getProtectedTexName()); 299 glMatrixMode(GL_TEXTURE); 300 glLoadIdentity(); 301 glMatrixMode(GL_MODELVIEW); 302 glDisable(GL_TEXTURE_EXTERNAL_OES); 303 glEnable(GL_TEXTURE_2D); 304 } 305 306 drawWithOpenGL(clip); 307 308 glDisable(GL_TEXTURE_EXTERNAL_OES); 309 glDisable(GL_TEXTURE_2D); 310} 311 312// As documented in libhardware header, formats in the range 313// 0x100 - 0x1FF are specific to the HAL implementation, and 314// are known to have no alpha channel 315// TODO: move definition for device-specific range into 316// hardware.h, instead of using hard-coded values here. 317#define HARDWARE_IS_DEVICE_FORMAT(f) ((f) >= 0x100 && (f) <= 0x1FF) 318 319bool Layer::getOpacityForFormat(uint32_t format) 320{ 321 if (HARDWARE_IS_DEVICE_FORMAT(format)) { 322 return true; 323 } 324 PixelFormatInfo info; 325 status_t err = getPixelFormatInfo(PixelFormat(format), &info); 326 // in case of error (unknown format), we assume no blending 327 return (err || info.h_alpha <= info.l_alpha); 328} 329 330 331bool Layer::isOpaque() const 332{ 333 // if we don't have a buffer yet, we're translucent regardless of the 334 // layer's opaque flag. 335 if (mActiveBuffer == 0) { 336 return false; 337 } 338 339 // if the layer has the opaque flag, then we're always opaque, 340 // otherwise we use the current buffer's format. 341 return mOpaqueLayer || mCurrentOpacity; 342} 343 344bool Layer::isProtected() const 345{ 346 const sp<GraphicBuffer>& activeBuffer(mActiveBuffer); 347 return (activeBuffer != 0) && 348 (activeBuffer->getUsage() & GRALLOC_USAGE_PROTECTED); 349} 350 351uint32_t Layer::doTransaction(uint32_t flags) 352{ 353 const Layer::State& front(drawingState()); 354 const Layer::State& temp(currentState()); 355 356 const bool sizeChanged = (front.requested_w != temp.requested_w) || 357 (front.requested_h != temp.requested_h); 358 359 if (sizeChanged) { 360 // the size changed, we need to ask our client to request a new buffer 361 LOGD_IF(DEBUG_RESIZE, 362 "doTransaction: " 363 "resize (layer=%p), requested (%dx%d), drawing (%d,%d), " 364 "scalingMode=%d", 365 this, 366 int(temp.requested_w), int(temp.requested_h), 367 int(front.requested_w), int(front.requested_h), 368 mCurrentScalingMode); 369 370 if (!isFixedSize()) { 371 // this will make sure LayerBase::doTransaction doesn't update 372 // the drawing state's size 373 Layer::State& editDraw(mDrawingState); 374 editDraw.requested_w = temp.requested_w; 375 editDraw.requested_h = temp.requested_h; 376 } 377 378 // record the new size, form this point on, when the client request 379 // a buffer, it'll get the new size. 380 mSurfaceTexture->setDefaultBufferSize(temp.requested_w, 381 temp.requested_h); 382 } 383 384 return LayerBase::doTransaction(flags); 385} 386 387bool Layer::isFixedSize() const { 388 return mCurrentScalingMode != NATIVE_WINDOW_SCALING_MODE_FREEZE; 389} 390 391bool Layer::isCropped() const { 392 return !mCurrentCrop.isEmpty(); 393} 394 395// ---------------------------------------------------------------------------- 396// pageflip handling... 397// ---------------------------------------------------------------------------- 398 399void Layer::lockPageFlip(bool& recomputeVisibleRegions) 400{ 401 if (mQueuedFrames > 0) { 402 // Capture the old state of the layer for comparisons later 403 const bool oldOpacity = isOpaque(); 404 sp<GraphicBuffer> oldActiveBuffer = mActiveBuffer; 405 406 // signal another event if we have more frames pending 407 if (android_atomic_dec(&mQueuedFrames) > 1) { 408 mFlinger->signalEvent(); 409 } 410 411 if (mSurfaceTexture->updateTexImage() < NO_ERROR) { 412 // something happened! 413 recomputeVisibleRegions = true; 414 return; 415 } 416 417 // update the active buffer 418 mActiveBuffer = mSurfaceTexture->getCurrentBuffer(); 419 420 const Rect crop(mSurfaceTexture->getCurrentCrop()); 421 const uint32_t transform(mSurfaceTexture->getCurrentTransform()); 422 const uint32_t scalingMode(mSurfaceTexture->getCurrentScalingMode()); 423 if ((crop != mCurrentCrop) || 424 (transform != mCurrentTransform) || 425 (scalingMode != mCurrentScalingMode)) 426 { 427 mCurrentCrop = crop; 428 mCurrentTransform = transform; 429 mCurrentScalingMode = scalingMode; 430 mFlinger->invalidateHwcGeometry(); 431 } 432 433 GLfloat textureMatrix[16]; 434 mSurfaceTexture->getTransformMatrix(textureMatrix); 435 if (memcmp(textureMatrix, mTextureMatrix, sizeof(textureMatrix))) { 436 memcpy(mTextureMatrix, textureMatrix, sizeof(textureMatrix)); 437 mFlinger->invalidateHwcGeometry(); 438 } 439 440 uint32_t bufWidth = mActiveBuffer->getWidth(); 441 uint32_t bufHeight = mActiveBuffer->getHeight(); 442 if (oldActiveBuffer != NULL) { 443 if (bufWidth != uint32_t(oldActiveBuffer->width) || 444 bufHeight != uint32_t(oldActiveBuffer->height)) { 445 mFlinger->invalidateHwcGeometry(); 446 } 447 } 448 449 mCurrentOpacity = getOpacityForFormat(mActiveBuffer->format); 450 if (oldOpacity != isOpaque()) { 451 recomputeVisibleRegions = true; 452 } 453 454 glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 455 glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 456 457 // update the layer size if needed 458 const Layer::State& front(drawingState()); 459 460 // FIXME: mPostedDirtyRegion = dirty & bounds 461 mPostedDirtyRegion.set(front.w, front.h); 462 463 if ((front.w != front.requested_w) || 464 (front.h != front.requested_h)) 465 { 466 // check that we received a buffer of the right size 467 // (Take the buffer's orientation into account) 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 } 495 496 LOGD_IF(DEBUG_RESIZE, 497 "lockPageFlip : " 498 " (layer=%p), buffer (%ux%u, tr=%02x), " 499 "requested (%dx%d)", 500 this, 501 bufWidth, bufHeight, mCurrentTransform, 502 front.requested_w, front.requested_h); 503 } 504 } 505} 506 507void Layer::unlockPageFlip( 508 const Transform& planeTransform, Region& outDirtyRegion) 509{ 510 Region dirtyRegion(mPostedDirtyRegion); 511 if (!dirtyRegion.isEmpty()) { 512 mPostedDirtyRegion.clear(); 513 // The dirty region is given in the layer's coordinate space 514 // transform the dirty region by the surface's transformation 515 // and the global transformation. 516 const Layer::State& s(drawingState()); 517 const Transform tr(planeTransform * s.transform); 518 dirtyRegion = tr.transform(dirtyRegion); 519 520 // At this point, the dirty region is in screen space. 521 // Make sure it's constrained by the visible region (which 522 // is in screen space as well). 523 dirtyRegion.andSelf(visibleRegionScreen); 524 outDirtyRegion.orSelf(dirtyRegion); 525 } 526} 527 528void Layer::dump(String8& result, char* buffer, size_t SIZE) const 529{ 530 LayerBaseClient::dump(result, buffer, SIZE); 531 532 sp<const GraphicBuffer> buf0(mActiveBuffer); 533 uint32_t w0=0, h0=0, s0=0, f0=0; 534 if (buf0 != 0) { 535 w0 = buf0->getWidth(); 536 h0 = buf0->getHeight(); 537 s0 = buf0->getStride(); 538 f0 = buf0->format; 539 } 540 snprintf(buffer, SIZE, 541 " " 542 "format=%2d, activeBuffer=[%4ux%4u:%4u,%3X]," 543 " transform-hint=0x%02x, queued-frames=%d\n", 544 mFormat, w0, h0, s0,f0, 545 getTransformHint(), mQueuedFrames); 546 547 result.append(buffer); 548 549 if (mSurfaceTexture != 0) { 550 mSurfaceTexture->dump(result, " ", buffer, SIZE); 551 } 552} 553 554uint32_t Layer::getEffectiveUsage(uint32_t usage) const 555{ 556 // TODO: should we do something special if mSecure is set? 557 if (mProtectedByApp) { 558 // need a hardware-protected path to external video sink 559 usage |= GraphicBuffer::USAGE_PROTECTED; 560 } 561 usage |= GraphicBuffer::USAGE_HW_COMPOSER; 562 return usage; 563} 564 565uint32_t Layer::getTransformHint() const { 566 uint32_t orientation = 0; 567 if (!mFlinger->mDebugDisableTransformHint) { 568 orientation = getPlaneOrientation(); 569 if (orientation & Transform::ROT_INVALID) { 570 orientation = 0; 571 } 572 } 573 return orientation; 574} 575 576// --------------------------------------------------------------------------- 577 578 579}; // namespace android 580