The Tor Browser: widget/gonk/libdisplay/FramebufferSurface.cpp@fc2d59ddac77 (annotated)

widget/gonk/libdisplay/FramebufferSurface.cpp@fc2d59ddac77 (annotated)

widget/gonk/libdisplay/FramebufferSurface.cpp

Wed, 31 Dec 2014 07:22:50 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 07:22:50 +0100
branch: TOR_BUG_3246
changeset 4: fc2d59ddac77
permissions: -rw-r--r--

Correct previous dual key logic pending first delivery installment.

 /*
  **
  ** Copyright 2012 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 <stdio.h>
 #include <string.h>
 #include <errno.h>
 #include <cutils/log.h>
 #include <utils/String8.h>
 #include <ui/Rect.h>
 #include <EGL/egl.h>
 #include <hardware/hardware.h>
 #if ANDROID_VERSION == 17
 #include <gui/SurfaceTextureClient.h>
 #endif
 #include <ui/GraphicBuffer.h>
 #include "FramebufferSurface.h"
 #include "GraphicBufferAlloc.h"
 #ifndef NUM_FRAMEBUFFER_SURFACE_BUFFERS
 #define NUM_FRAMEBUFFER_SURFACE_BUFFERS (2)
 #endif
 // ----------------------------------------------------------------------------
 namespace android {
 // ----------------------------------------------------------------------------
 /*
  * This implements the (main) framebuffer management. This class
  * was adapted from the version in SurfaceFlinger
  */
 FramebufferSurface::FramebufferSurface(int disp, uint32_t width, uint32_t height, uint32_t format,
         sp<BufferQueue>& bq) :
 #if ANDROID_VERSION >= 19
     ConsumerBase(bq, true),
 #else
     ConsumerBase(bq),
 #endif
     mDisplayType(disp),
     mCurrentBufferSlot(-1),
     mCurrentBuffer(0),
     lastHandle(0)
 {
     mName = "FramebufferSurface";
 #if ANDROID_VERSION >= 19
     sp<IGraphicBufferConsumer> consumer = mConsumer;
 #else
     sp<BufferQueue> consumer = mBufferQueue;
     consumer->setSynchronousMode(true);
 #endif
     consumer->setConsumerName(mName);
     consumer->setConsumerUsageBits(GRALLOC_USAGE_HW_FB |
                                    GRALLOC_USAGE_HW_RENDER |
                                    GRALLOC_USAGE_HW_COMPOSER);
     consumer->setDefaultBufferFormat(format);
     consumer->setDefaultBufferSize(width, height);
     consumer->setDefaultMaxBufferCount(NUM_FRAMEBUFFER_SURFACE_BUFFERS);
 }
 status_t FramebufferSurface::nextBuffer(sp<GraphicBuffer>& outBuffer, sp<Fence>& outFence) {
     Mutex::Autolock lock(mMutex);
     BufferQueue::BufferItem item;
 #if ANDROID_VERSION >= 19
     status_t err = acquireBufferLocked(&item, 0);
 #else
     status_t err = acquireBufferLocked(&item);
 #endif
     if (err == BufferQueue::NO_BUFFER_AVAILABLE) {
         outBuffer = mCurrentBuffer;
         return NO_ERROR;
     } else if (err != NO_ERROR) {
         ALOGE("error acquiring buffer: %s (%d)", strerror(-err), err);
         return err;
     }
     // If the BufferQueue has freed and reallocated a buffer in mCurrentSlot
     // then we may have acquired the slot we already own.  If we had released
     // our current buffer before we call acquireBuffer then that release call
     // would have returned STALE_BUFFER_SLOT, and we would have called
     // freeBufferLocked on that slot.  Because the buffer slot has already
     // been overwritten with the new buffer all we have to do is skip the
     // releaseBuffer call and we should be in the same state we'd be in if we
     // had released the old buffer first.
     if (mCurrentBufferSlot != BufferQueue::INVALID_BUFFER_SLOT &&
         item.mBuf != mCurrentBufferSlot) {
         // Release the previous buffer.
 #if ANDROID_VERSION >= 19
         err = releaseBufferLocked(mCurrentBufferSlot, mCurrentBuffer,
                 EGL_NO_DISPLAY, EGL_NO_SYNC_KHR);
 #else
         err = releaseBufferLocked(mCurrentBufferSlot, EGL_NO_DISPLAY,
                 EGL_NO_SYNC_KHR);
 #endif
         if (err != NO_ERROR && err != BufferQueue::STALE_BUFFER_SLOT) {
             ALOGE("error releasing buffer: %s (%d)", strerror(-err), err);
             return err;
         }
     }
     mCurrentBufferSlot = item.mBuf;
     mCurrentBuffer = mSlots[mCurrentBufferSlot].mGraphicBuffer;
     outFence = item.mFence;
     outBuffer = mCurrentBuffer;
     return NO_ERROR;
 }
 // Overrides ConsumerBase::onFrameAvailable(), does not call base class impl.
 void FramebufferSurface::onFrameAvailable() {
     sp<GraphicBuffer> buf;
     sp<Fence> acquireFence;
     status_t err = nextBuffer(buf, acquireFence);
     if (err != NO_ERROR) {
         ALOGE("error latching nnext FramebufferSurface buffer: %s (%d)",
                 strerror(-err), err);
         return;
     }
     if (acquireFence.get() && acquireFence->isValid())
         mPrevFBAcquireFence = new Fence(acquireFence->dup());
     else
         mPrevFBAcquireFence = Fence::NO_FENCE;
     lastHandle = buf->handle;
 }
 void FramebufferSurface::freeBufferLocked(int slotIndex) {
     ConsumerBase::freeBufferLocked(slotIndex);
     if (slotIndex == mCurrentBufferSlot) {
         mCurrentBufferSlot = BufferQueue::INVALID_BUFFER_SLOT;
     }
 }
 status_t FramebufferSurface::setReleaseFenceFd(int fenceFd) {
     status_t err = NO_ERROR;
     if (fenceFd >= 0) {
         sp<Fence> fence(new Fence(fenceFd));
         if (mCurrentBufferSlot != BufferQueue::INVALID_BUFFER_SLOT) {
 #if ANDROID_VERSION >= 19
             status_t err = addReleaseFence(mCurrentBufferSlot, mCurrentBuffer,  fence);
 #else
             status_t err = addReleaseFence(mCurrentBufferSlot, fence);
 #endif
             ALOGE_IF(err, "setReleaseFenceFd: failed to add the fence: %s (%d)",
                     strerror(-err), err);
         }
     }
     return err;
 }
 int FramebufferSurface::GetPrevFBAcquireFd() {
   return mPrevFBAcquireFence->dup();
 }
 status_t FramebufferSurface::setUpdateRectangle(const Rect& r)
 {
     return INVALID_OPERATION;
 }
 status_t FramebufferSurface::compositionComplete()
 {
     return NO_ERROR;
 }
 void FramebufferSurface::dump(String8& result) {
     ConsumerBase::dump(result);
 }
 void FramebufferSurface::dump(String8& result, const char* prefix) {
     ConsumerBase::dump(result);
 }
 // ----------------------------------------------------------------------------
 }; // namespace android
 // ----------------------------------------------------------------------------

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widget/gonk/libdisplay/FramebufferSurface.cpp@fc2d59ddac77 (annotated)

widget/gonk/libdisplay/FramebufferSurface.cpp