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Diffstat (limited to 'services/surfaceflinger/Layer.cpp')
| -rw-r--r-- | services/surfaceflinger/Layer.cpp | 875 |
1 files changed, 875 insertions, 0 deletions
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp new file mode 100644 index 0000000..758da4e --- /dev/null +++ b/services/surfaceflinger/Layer.cpp @@ -0,0 +1,875 @@ +/* + * Copyright (C) 2007 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include <stdlib.h> +#include <stdint.h> +#include <sys/types.h> + +#include <cutils/properties.h> +#include <cutils/native_handle.h> + +#include <utils/Errors.h> +#include <utils/Log.h> +#include <utils/StopWatch.h> + +#include <ui/GraphicBuffer.h> +#include <ui/PixelFormat.h> + +#include <surfaceflinger/Surface.h> + +#include "clz.h" +#include "GLExtensions.h" +#include "Layer.h" +#include "SurfaceFlinger.h" +#include "DisplayHardware/DisplayHardware.h" + + +#define DEBUG_RESIZE 0 + + +namespace android { + +template <typename T> inline T min(T a, T b) { + return a<b ? a : b; +} + +// --------------------------------------------------------------------------- + +Layer::Layer(SurfaceFlinger* flinger, + DisplayID display, const sp<Client>& client) + : LayerBaseClient(flinger, display, client), + mGLExtensions(GLExtensions::getInstance()), + mNeedsBlending(true), + mNeedsDithering(false), + mSecure(false), + mTextureManager(), + mBufferManager(mTextureManager), + mWidth(0), mHeight(0), mFixedSize(false) +{ +} + +Layer::~Layer() +{ + // FIXME: must be called from the main UI thread + EGLDisplay dpy(mFlinger->graphicPlane(0).getEGLDisplay()); + mBufferManager.destroy(dpy); + + // we can use getUserClientUnsafe here because we know we're + // single-threaded at that point. + sp<UserClient> ourClient(mUserClientRef.getUserClientUnsafe()); + if (ourClient != 0) { + ourClient->detachLayer(this); + } +} + +status_t Layer::setToken(const sp<UserClient>& userClient, + SharedClient* sharedClient, int32_t token) +{ + sp<SharedBufferServer> lcblk = new SharedBufferServer( + sharedClient, token, mBufferManager.getDefaultBufferCount(), + getIdentity()); + + status_t err = mUserClientRef.setToken(userClient, lcblk, token); + + LOGE_IF(err != NO_ERROR, + "ClientRef::setToken(%p, %p, %u) failed", + userClient.get(), lcblk.get(), token); + + if (err == NO_ERROR) { + // we need to free the buffers associated with this surface + } + + return err; +} + +int32_t Layer::getToken() const +{ + return mUserClientRef.getToken(); +} + +sp<UserClient> Layer::getClient() const +{ + return mUserClientRef.getClient(); +} + +// called with SurfaceFlinger::mStateLock as soon as the layer is entered +// in the purgatory list +void Layer::onRemoved() +{ + ClientRef::Access sharedClient(mUserClientRef); + SharedBufferServer* lcblk(sharedClient.get()); + if (lcblk) { + // wake up the condition + lcblk->setStatus(NO_INIT); + } +} + +sp<LayerBaseClient::Surface> Layer::createSurface() const +{ + return mSurface; +} + +status_t Layer::ditch() +{ + // NOTE: Called from the main UI thread + + // the layer is not on screen anymore. free as much resources as possible + mFreezeLock.clear(); + + EGLDisplay dpy(mFlinger->graphicPlane(0).getEGLDisplay()); + mBufferManager.destroy(dpy); + mSurface.clear(); + + Mutex::Autolock _l(mLock); + mWidth = mHeight = 0; + return NO_ERROR; +} + +status_t Layer::setBuffers( uint32_t w, uint32_t h, + PixelFormat format, uint32_t flags) +{ + // this surfaces pixel format + PixelFormatInfo info; + status_t err = getPixelFormatInfo(format, &info); + if (err) return err; + + // the display's pixel format + const DisplayHardware& hw(graphicPlane(0).displayHardware()); + uint32_t const maxSurfaceDims = min( + hw.getMaxTextureSize(), hw.getMaxViewportDims()); + + // never allow a surface larger than what our underlying GL implementation + // can handle. + if ((uint32_t(w)>maxSurfaceDims) || (uint32_t(h)>maxSurfaceDims)) { + return BAD_VALUE; + } + + PixelFormatInfo displayInfo; + getPixelFormatInfo(hw.getFormat(), &displayInfo); + const uint32_t hwFlags = hw.getFlags(); + + mFormat = format; + mReqFormat = format; + mWidth = w; + mHeight = h; + mSecure = (flags & ISurfaceComposer::eSecure) ? true : false; + mNeedsBlending = (info.h_alpha - info.l_alpha) > 0; + + // we use the red index + int displayRedSize = displayInfo.getSize(PixelFormatInfo::INDEX_RED); + int layerRedsize = info.getSize(PixelFormatInfo::INDEX_RED); + mNeedsDithering = layerRedsize > displayRedSize; + + mSurface = new SurfaceLayer(mFlinger, this); + return NO_ERROR; +} + +void Layer::reloadTexture(const Region& dirty) +{ + sp<GraphicBuffer> buffer(mBufferManager.getActiveBuffer()); + if (buffer == NULL) { + // this situation can happen if we ran out of memory for instance. + // not much we can do. continue to use whatever texture was bound + // to this context. + return; + } + + if (mGLExtensions.haveDirectTexture()) { + EGLDisplay dpy(mFlinger->graphicPlane(0).getEGLDisplay()); + if (mBufferManager.initEglImage(dpy, buffer) != NO_ERROR) { + // not sure what we can do here... + goto slowpath; + } + } else { +slowpath: + GGLSurface t; + status_t res = buffer->lock(&t, GRALLOC_USAGE_SW_READ_OFTEN); + LOGE_IF(res, "error %d (%s) locking buffer %p", + res, strerror(res), buffer.get()); + if (res == NO_ERROR) { + mBufferManager.loadTexture(dirty, t); + buffer->unlock(); + } + } +} + +void Layer::onDraw(const Region& clip) const +{ + Texture tex(mBufferManager.getActiveTexture()); + if (tex.name == -1LU) { + // the texture has not been created yet, this Layer has + // in fact never been drawn into. This happens frequently with + // SurfaceView because the WindowManager can't know when the client + // has drawn the first time. + + // If there is nothing under us, we paint the screen in black, otherwise + // we just skip this update. + + // figure out if there is something below us + Region under; + const SurfaceFlinger::LayerVector& drawingLayers(mFlinger->mDrawingState.layersSortedByZ); + const size_t count = drawingLayers.size(); + for (size_t i=0 ; i<count ; ++i) { + const sp<LayerBase>& layer(drawingLayers[i]); + if (layer.get() == static_cast<LayerBase const*>(this)) + break; + under.orSelf(layer->visibleRegionScreen); + } + // if not everything below us is covered, we plug the holes! + Region holes(clip.subtract(under)); + if (!holes.isEmpty()) { + clearWithOpenGL(holes, 0, 0, 0, 1); + } + return; + } + drawWithOpenGL(clip, tex); +} + +bool Layer::needsFiltering() const +{ + if (!(mFlags & DisplayHardware::SLOW_CONFIG)) { + // NOTE: there is a race here, because mFixedSize is updated in a + // binder transaction. however, it doesn't really matter since it is + // evaluated each time we draw. To be perfectly correct, this flag + // would have to be associated with a buffer. + if (mFixedSize) + return true; + } + return LayerBase::needsFiltering(); +} + + +status_t Layer::setBufferCount(int bufferCount) +{ + ClientRef::Access sharedClient(mUserClientRef); + SharedBufferServer* lcblk(sharedClient.get()); + if (!lcblk) { + // oops, the client is already gone + return DEAD_OBJECT; + } + + // NOTE: lcblk->resize() is protected by an internal lock + status_t err = lcblk->resize(bufferCount); + if (err == NO_ERROR) + mBufferManager.resize(bufferCount); + + return err; +} + +sp<GraphicBuffer> Layer::requestBuffer(int index, + uint32_t reqWidth, uint32_t reqHeight, uint32_t reqFormat, + uint32_t usage) +{ + sp<GraphicBuffer> buffer; + + if (int32_t(reqWidth | reqHeight | reqFormat) < 0) + return buffer; + + if ((!reqWidth && reqHeight) || (reqWidth && !reqHeight)) + return buffer; + + // this ensures our client doesn't go away while we're accessing + // the shared area. + ClientRef::Access sharedClient(mUserClientRef); + SharedBufferServer* lcblk(sharedClient.get()); + if (!lcblk) { + // oops, the client is already gone + return buffer; + } + + /* + * This is called from the client's Surface::dequeue(). This can happen + * at any time, especially while we're in the middle of using the + * buffer 'index' as our front buffer. + * + * Make sure the buffer we're resizing is not the front buffer and has been + * dequeued. Once this condition is asserted, we are guaranteed that this + * buffer cannot become the front buffer under our feet, since we're called + * from Surface::dequeue() + */ + status_t err = lcblk->assertReallocate(index); + LOGE_IF(err, "assertReallocate(%d) failed (%s)", index, strerror(-err)); + if (err != NO_ERROR) { + // the surface may have died + return buffer; + } + + uint32_t w, h, f; + { // scope for the lock + Mutex::Autolock _l(mLock); + const bool fixedSizeChanged = mFixedSize != (reqWidth && reqHeight); + const bool formatChanged = mReqFormat != reqFormat; + mReqWidth = reqWidth; + mReqHeight = reqHeight; + mReqFormat = reqFormat; + mFixedSize = reqWidth && reqHeight; + w = reqWidth ? reqWidth : mWidth; + h = reqHeight ? reqHeight : mHeight; + f = reqFormat ? reqFormat : mFormat; + buffer = mBufferManager.detachBuffer(index); + if (fixedSizeChanged || formatChanged) { + lcblk->reallocateAllExcept(index); + } + } + + const uint32_t effectiveUsage = getEffectiveUsage(usage); + if (buffer!=0 && buffer->getStrongCount() == 1) { + err = buffer->reallocate(w, h, f, effectiveUsage); + } else { + // here we have to reallocate a new buffer because we could have a + // client in our process with a reference to it (eg: status bar), + // and we can't release the handle under its feet. + buffer.clear(); + buffer = new GraphicBuffer(w, h, f, effectiveUsage); + err = buffer->initCheck(); + } + + if (err || buffer->handle == 0) { + LOGE_IF(err || buffer->handle == 0, + "Layer::requestBuffer(this=%p), index=%d, w=%d, h=%d failed (%s)", + this, index, w, h, strerror(-err)); + } else { + LOGD_IF(DEBUG_RESIZE, + "Layer::requestBuffer(this=%p), index=%d, w=%d, h=%d, handle=%p", + this, index, w, h, buffer->handle); + } + + if (err == NO_ERROR && buffer->handle != 0) { + Mutex::Autolock _l(mLock); + mBufferManager.attachBuffer(index, buffer); + } + return buffer; +} + +uint32_t Layer::getEffectiveUsage(uint32_t usage) const +{ + /* + * buffers used for software rendering, but h/w composition + * are allocated with SW_READ_OFTEN | SW_WRITE_OFTEN | HW_TEXTURE + * + * buffers used for h/w rendering and h/w composition + * are allocated with HW_RENDER | HW_TEXTURE + * + * buffers used with h/w rendering and either NPOT or no egl_image_ext + * are allocated with SW_READ_RARELY | HW_RENDER + * + */ + + if (mSecure) { + // secure buffer, don't store it into the GPU + usage = GraphicBuffer::USAGE_SW_READ_OFTEN | + GraphicBuffer::USAGE_SW_WRITE_OFTEN; + } else { + // it's allowed to modify the usage flags here, but generally + // the requested flags should be honored. + // request EGLImage for all buffers + usage |= GraphicBuffer::USAGE_HW_TEXTURE; + } + return usage; +} + +uint32_t Layer::doTransaction(uint32_t flags) +{ + const Layer::State& front(drawingState()); + const Layer::State& temp(currentState()); + + const bool sizeChanged = (front.requested_w != temp.requested_w) || + (front.requested_h != temp.requested_h); + + if (sizeChanged) { + // the size changed, we need to ask our client to request a new buffer + LOGD_IF(DEBUG_RESIZE, + "resize (layer=%p), requested (%dx%d), drawing (%d,%d)", + this, + int(temp.requested_w), int(temp.requested_h), + int(front.requested_w), int(front.requested_h)); + + if (!isFixedSize()) { + // we're being resized and there is a freeze display request, + // acquire a freeze lock, so that the screen stays put + // until we've redrawn at the new size; this is to avoid + // glitches upon orientation changes. + if (mFlinger->hasFreezeRequest()) { + // if the surface is hidden, don't try to acquire the + // freeze lock, since hidden surfaces may never redraw + if (!(front.flags & ISurfaceComposer::eLayerHidden)) { + mFreezeLock = mFlinger->getFreezeLock(); + } + } + + // this will make sure LayerBase::doTransaction doesn't update + // the drawing state's size + Layer::State& editDraw(mDrawingState); + editDraw.requested_w = temp.requested_w; + editDraw.requested_h = temp.requested_h; + + // record the new size, form this point on, when the client request + // a buffer, it'll get the new size. + setBufferSize(temp.requested_w, temp.requested_h); + + ClientRef::Access sharedClient(mUserClientRef); + SharedBufferServer* lcblk(sharedClient.get()); + if (lcblk) { + // all buffers need reallocation + lcblk->reallocateAll(); + } + } else { + // record the new size + setBufferSize(temp.requested_w, temp.requested_h); + } + } + + if (temp.sequence != front.sequence) { + if (temp.flags & ISurfaceComposer::eLayerHidden || temp.alpha == 0) { + // this surface is now hidden, so it shouldn't hold a freeze lock + // (it may never redraw, which is fine if it is hidden) + mFreezeLock.clear(); + } + } + + return LayerBase::doTransaction(flags); +} + +void Layer::setBufferSize(uint32_t w, uint32_t h) { + Mutex::Autolock _l(mLock); + mWidth = w; + mHeight = h; +} + +bool Layer::isFixedSize() const { + Mutex::Autolock _l(mLock); + return mFixedSize; +} + +// ---------------------------------------------------------------------------- +// pageflip handling... +// ---------------------------------------------------------------------------- + +void Layer::lockPageFlip(bool& recomputeVisibleRegions) +{ + ClientRef::Access sharedClient(mUserClientRef); + SharedBufferServer* lcblk(sharedClient.get()); + if (!lcblk) { + // client died + recomputeVisibleRegions = true; + return; + } + + ssize_t buf = lcblk->retireAndLock(); + if (buf == NOT_ENOUGH_DATA) { + // NOTE: This is not an error, it simply means there is nothing to + // retire. The buffer is locked because we will use it + // for composition later in the loop + return; + } + + if (buf < NO_ERROR) { + LOGE("retireAndLock() buffer index (%d) out of range", int(buf)); + mPostedDirtyRegion.clear(); + return; + } + + // we retired a buffer, which becomes the new front buffer + if (mBufferManager.setActiveBufferIndex(buf) < NO_ERROR) { + LOGE("retireAndLock() buffer index (%d) out of range", int(buf)); + mPostedDirtyRegion.clear(); + return; + } + + // get the dirty region + sp<GraphicBuffer> newFrontBuffer(getBuffer(buf)); + if (newFrontBuffer != NULL) { + // compute the posted region + const Region dirty(lcblk->getDirtyRegion(buf)); + mPostedDirtyRegion = dirty.intersect( newFrontBuffer->getBounds() ); + + // update the layer size and release freeze-lock + const Layer::State& front(drawingState()); + if (newFrontBuffer->getWidth() == front.requested_w && + newFrontBuffer->getHeight() == front.requested_h) + { + if ((front.w != front.requested_w) || + (front.h != front.requested_h)) + { + // Here we pretend the transaction happened by updating the + // current and drawing states. Drawing state is only accessed + // in this thread, no need to have it locked + Layer::State& editDraw(mDrawingState); + editDraw.w = editDraw.requested_w; + editDraw.h = editDraw.requested_h; + + // We also need to update the current state so that we don't + // end-up doing too much work during the next transaction. + // NOTE: We actually don't need hold the transaction lock here + // because State::w and State::h are only accessed from + // this thread + Layer::State& editTemp(currentState()); + editTemp.w = editDraw.w; + editTemp.h = editDraw.h; + + // recompute visible region + recomputeVisibleRegions = true; + } + + // we now have the correct size, unfreeze the screen + mFreezeLock.clear(); + } + } else { + // this should not happen unless we ran out of memory while + // allocating the buffer. we're hoping that things will get back + // to normal the next time the app tries to draw into this buffer. + // meanwhile, pretend the screen didn't update. + mPostedDirtyRegion.clear(); + } + + if (lcblk->getQueuedCount()) { + // signal an event if we have more buffers waiting + mFlinger->signalEvent(); + } + + /* a buffer was posted, so we need to call reloadTexture(), which + * will update our internal data structures (eg: EGLImageKHR or + * texture names). we need to do this even if mPostedDirtyRegion is + * empty -- it's orthogonal to the fact that a new buffer was posted, + * for instance, a degenerate case could be that the user did an empty + * update but repainted the buffer with appropriate content (after a + * resize for instance). + */ + reloadTexture( mPostedDirtyRegion ); +} + +void Layer::unlockPageFlip( + const Transform& planeTransform, Region& outDirtyRegion) +{ + Region dirtyRegion(mPostedDirtyRegion); + if (!dirtyRegion.isEmpty()) { + mPostedDirtyRegion.clear(); + // The dirty region is given in the layer's coordinate space + // transform the dirty region by the surface's transformation + // and the global transformation. + const Layer::State& s(drawingState()); + const Transform tr(planeTransform * s.transform); + dirtyRegion = tr.transform(dirtyRegion); + + // At this point, the dirty region is in screen space. + // Make sure it's constrained by the visible region (which + // is in screen space as well). + dirtyRegion.andSelf(visibleRegionScreen); + outDirtyRegion.orSelf(dirtyRegion); + } + if (visibleRegionScreen.isEmpty()) { + // an invisible layer should not hold a freeze-lock + // (because it may never be updated and therefore never release it) + mFreezeLock.clear(); + } +} + +void Layer::finishPageFlip() +{ + ClientRef::Access sharedClient(mUserClientRef); + SharedBufferServer* lcblk(sharedClient.get()); + if (lcblk) { + int buf = mBufferManager.getActiveBufferIndex(); + if (buf >= 0) { + status_t err = lcblk->unlock( buf ); + LOGE_IF(err!=NO_ERROR, + "layer %p, buffer=%d wasn't locked!", + this, buf); + } + } +} + + +void Layer::dump(String8& result, char* buffer, size_t SIZE) const +{ + LayerBaseClient::dump(result, buffer, SIZE); + + ClientRef::Access sharedClient(mUserClientRef); + SharedBufferServer* lcblk(sharedClient.get()); + uint32_t totalTime = 0; + if (lcblk) { + SharedBufferStack::Statistics stats = lcblk->getStats(); + totalTime= stats.totalTime; + result.append( lcblk->dump(" ") ); + } + + sp<const GraphicBuffer> buf0(getBuffer(0)); + sp<const GraphicBuffer> buf1(getBuffer(1)); + uint32_t w0=0, h0=0, s0=0; + uint32_t w1=0, h1=0, s1=0; + if (buf0 != 0) { + w0 = buf0->getWidth(); + h0 = buf0->getHeight(); + s0 = buf0->getStride(); + } + if (buf1 != 0) { + w1 = buf1->getWidth(); + h1 = buf1->getHeight(); + s1 = buf1->getStride(); + } + snprintf(buffer, SIZE, + " " + "format=%2d, [%3ux%3u:%3u] [%3ux%3u:%3u]," + " freezeLock=%p, dq-q-time=%u us\n", + mFormat, w0, h0, s0, w1, h1, s1, + getFreezeLock().get(), totalTime); + + result.append(buffer); +} + +// --------------------------------------------------------------------------- + +Layer::ClientRef::ClientRef() + : mControlBlock(0), mToken(-1) { +} + +Layer::ClientRef::~ClientRef() { +} + +int32_t Layer::ClientRef::getToken() const { + Mutex::Autolock _l(mLock); + return mToken; +} + +sp<UserClient> Layer::ClientRef::getClient() const { + Mutex::Autolock _l(mLock); + return mUserClient.promote(); +} + +status_t Layer::ClientRef::setToken(const sp<UserClient>& uc, + const sp<SharedBufferServer>& sharedClient, int32_t token) { + Mutex::Autolock _l(mLock); + + { // scope for strong mUserClient reference + sp<UserClient> userClient(mUserClient.promote()); + if (mUserClient != 0 && mControlBlock != 0) { + mControlBlock->setStatus(NO_INIT); + } + } + + mUserClient = uc; + mToken = token; + mControlBlock = sharedClient; + return NO_ERROR; +} + +sp<UserClient> Layer::ClientRef::getUserClientUnsafe() const { + return mUserClient.promote(); +} + +// this class gives us access to SharedBufferServer safely +// it makes sure the UserClient (and its associated shared memory) +// won't go away while we're accessing it. +Layer::ClientRef::Access::Access(const ClientRef& ref) + : mControlBlock(0) +{ + Mutex::Autolock _l(ref.mLock); + mUserClientStrongRef = ref.mUserClient.promote(); + if (mUserClientStrongRef != 0) + mControlBlock = ref.mControlBlock; +} + +Layer::ClientRef::Access::~Access() +{ +} + +// --------------------------------------------------------------------------- + +Layer::BufferManager::BufferManager(TextureManager& tm) + : mNumBuffers(NUM_BUFFERS), mTextureManager(tm), + mActiveBuffer(-1), mFailover(false) +{ +} + +Layer::BufferManager::~BufferManager() +{ +} + +status_t Layer::BufferManager::resize(size_t size) +{ + Mutex::Autolock _l(mLock); + mNumBuffers = size; + return NO_ERROR; +} + +// only for debugging +sp<GraphicBuffer> Layer::BufferManager::getBuffer(size_t index) const { + return mBufferData[index].buffer; +} + +status_t Layer::BufferManager::setActiveBufferIndex(size_t index) { + mActiveBuffer = index; + return NO_ERROR; +} + +size_t Layer::BufferManager::getActiveBufferIndex() const { + return mActiveBuffer; +} + +Texture Layer::BufferManager::getActiveTexture() const { + Texture res; + if (mFailover || mActiveBuffer<0) { + res = mFailoverTexture; + } else { + static_cast<Image&>(res) = mBufferData[mActiveBuffer].texture; + } + return res; +} + +sp<GraphicBuffer> Layer::BufferManager::getActiveBuffer() const { + sp<GraphicBuffer> result; + const ssize_t activeBuffer = mActiveBuffer; + if (activeBuffer >= 0) { + BufferData const * const buffers = mBufferData; + Mutex::Autolock _l(mLock); + result = buffers[activeBuffer].buffer; + } + return result; +} + +sp<GraphicBuffer> Layer::BufferManager::detachBuffer(size_t index) +{ + BufferData* const buffers = mBufferData; + sp<GraphicBuffer> buffer; + Mutex::Autolock _l(mLock); + buffer = buffers[index].buffer; + buffers[index].buffer = 0; + return buffer; +} + +status_t Layer::BufferManager::attachBuffer(size_t index, + const sp<GraphicBuffer>& buffer) +{ + BufferData* const buffers = mBufferData; + Mutex::Autolock _l(mLock); + buffers[index].buffer = buffer; + buffers[index].texture.dirty = true; + return NO_ERROR; +} + +status_t Layer::BufferManager::destroy(EGLDisplay dpy) +{ + BufferData* const buffers = mBufferData; + size_t num; + { // scope for the lock + Mutex::Autolock _l(mLock); + num = mNumBuffers; + for (size_t i=0 ; i<num ; i++) { + buffers[i].buffer = 0; + } + } + for (size_t i=0 ; i<num ; i++) { + destroyTexture(&buffers[i].texture, dpy); + } + destroyTexture(&mFailoverTexture, dpy); + return NO_ERROR; +} + +status_t Layer::BufferManager::initEglImage(EGLDisplay dpy, + const sp<GraphicBuffer>& buffer) +{ + status_t err = NO_INIT; + ssize_t index = mActiveBuffer; + if (index >= 0) { + if (!mFailover) { + Image& texture(mBufferData[index].texture); + err = mTextureManager.initEglImage(&texture, dpy, buffer); + // if EGLImage fails, we switch to regular texture mode, and we + // free all resources associated with using EGLImages. + if (err == NO_ERROR) { + mFailover = false; + destroyTexture(&mFailoverTexture, dpy); + } else { + mFailover = true; + const size_t num = mNumBuffers; + for (size_t i=0 ; i<num ; i++) { + destroyTexture(&mBufferData[i].texture, dpy); + } + } + } else { + // we failed once, don't try again + err = BAD_VALUE; + } + } + return err; +} + +status_t Layer::BufferManager::loadTexture( + const Region& dirty, const GGLSurface& t) +{ + return mTextureManager.loadTexture(&mFailoverTexture, dirty, t); +} + +status_t Layer::BufferManager::destroyTexture(Image* tex, EGLDisplay dpy) +{ + if (tex->name != -1U) { + glDeleteTextures(1, &tex->name); + tex->name = -1U; + } + if (tex->image != EGL_NO_IMAGE_KHR) { + eglDestroyImageKHR(dpy, tex->image); + tex->image = EGL_NO_IMAGE_KHR; + } + return NO_ERROR; +} + +// --------------------------------------------------------------------------- + +Layer::SurfaceLayer::SurfaceLayer(const sp<SurfaceFlinger>& flinger, + const sp<Layer>& owner) + : Surface(flinger, owner->getIdentity(), owner) +{ +} + +Layer::SurfaceLayer::~SurfaceLayer() +{ +} + +sp<GraphicBuffer> Layer::SurfaceLayer::requestBuffer(int index, + uint32_t w, uint32_t h, uint32_t format, uint32_t usage) +{ + sp<GraphicBuffer> buffer; + sp<Layer> owner(getOwner()); + if (owner != 0) { + /* + * requestBuffer() cannot be called from the main thread + * as it could cause a dead-lock, since it may have to wait + * on conditions updated my the main thread. + */ + buffer = owner->requestBuffer(index, w, h, format, usage); + } + return buffer; +} + +status_t Layer::SurfaceLayer::setBufferCount(int bufferCount) +{ + status_t err = DEAD_OBJECT; + sp<Layer> owner(getOwner()); + if (owner != 0) { + /* + * setBufferCount() cannot be called from the main thread + * as it could cause a dead-lock, since it may have to wait + * on conditions updated my the main thread. + */ + err = owner->setBufferCount(bufferCount); + } + return err; +} + +// --------------------------------------------------------------------------- + + +}; // namespace android |