80e0a397a4
BufferQueueInterposer allows a client to tap into a IGraphicBufferProducer-based buffer queue, and modify buffers as they pass from producer to consumer. VirtualDisplaySurface uses this to layer HWC composition on top of GLES composition before passing the buffer to the virtual display consumer. Bug: 8384764 Change-Id: I61ae54f3d90de6a35f4f02bb5e64e7cc88e1cb83
104 lines
3.5 KiB
C++
104 lines
3.5 KiB
C++
/*
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* Copyright 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "VirtualDisplaySurface.h"
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#include "HWComposer.h"
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// ---------------------------------------------------------------------------
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namespace android {
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// ---------------------------------------------------------------------------
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VirtualDisplaySurface::VirtualDisplaySurface(HWComposer& hwc, int disp,
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const sp<IGraphicBufferProducer>& sink, const String8& name)
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: mHwc(hwc),
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mDisplayId(disp),
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mSource(new BufferQueueInterposer(sink, name)),
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mName(name),
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mReleaseFence(Fence::NO_FENCE)
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{}
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VirtualDisplaySurface::~VirtualDisplaySurface() {
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if (mAcquiredBuffer != NULL) {
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status_t result = mSource->releaseBuffer(mReleaseFence);
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ALOGE_IF(result != NO_ERROR, "VirtualDisplaySurface \"%s\": "
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"failed to release previous buffer: %d",
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mName.string(), result);
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}
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}
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sp<IGraphicBufferProducer> VirtualDisplaySurface::getIGraphicBufferProducer() const {
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return mSource;
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}
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status_t VirtualDisplaySurface::compositionComplete() {
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return NO_ERROR;
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}
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status_t VirtualDisplaySurface::advanceFrame() {
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Mutex::Autolock lock(mMutex);
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status_t result = NO_ERROR;
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if (mAcquiredBuffer != NULL) {
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result = mSource->releaseBuffer(mReleaseFence);
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ALOGE_IF(result != NO_ERROR, "VirtualDisplaySurface \"%s\": "
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"failed to release previous buffer: %d",
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mName.string(), result);
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mAcquiredBuffer.clear();
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mReleaseFence = Fence::NO_FENCE;
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}
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sp<Fence> fence;
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result = mSource->acquireBuffer(&mAcquiredBuffer, &fence);
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if (result == BufferQueueInterposer::NO_BUFFER_AVAILABLE) {
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result = mSource->pullEmptyBuffer();
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if (result != NO_ERROR)
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return result;
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result = mSource->acquireBuffer(&mAcquiredBuffer, &fence);
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}
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if (result != NO_ERROR)
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return result;
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return mHwc.fbPost(mDisplayId, fence, mAcquiredBuffer);
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}
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status_t VirtualDisplaySurface::setReleaseFenceFd(int fenceFd) {
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if (fenceFd >= 0) {
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sp<Fence> fence(new Fence(fenceFd));
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Mutex::Autolock lock(mMutex);
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sp<Fence> mergedFence = Fence::merge(
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String8::format("VirtualDisplaySurface \"%s\"",
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mName.string()),
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mReleaseFence, fence);
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if (!mergedFence->isValid()) {
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ALOGE("VirtualDisplaySurface \"%s\": failed to merge release fence",
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mName.string());
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// synchronization is broken, the best we can do is hope fences
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// signal in order so the new fence will act like a union
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mReleaseFence = fence;
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return BAD_VALUE;
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}
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mReleaseFence = mergedFence;
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}
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return NO_ERROR;
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}
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void VirtualDisplaySurface::dump(String8& result) const {
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}
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// ---------------------------------------------------------------------------
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} // namespace android
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// ---------------------------------------------------------------------------
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