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/*
**
** 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.
*/
// #define LOG_NDEBUG 0
#undef LOG_TAG
#define LOG_TAG "FramebufferSurface"
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <utils/String8.h>
#include <log/log.h>
#include <hardware/hardware.h>
#include <gui/BufferItem.h>
#include <gui/BufferQueue.h>
#include <gui/Surface.h>
#include <ui/DebugUtils.h>
#include <ui/GraphicBuffer.h>
#include <ui/Rect.h>
#include "FramebufferSurface.h"
#include "HWComposer.h"
#include "../SurfaceFlinger.h"
// ----------------------------------------------------------------------------
namespace android {
// ----------------------------------------------------------------------------
using ui::Dataspace;
/*
* This implements the (main) framebuffer management. This class is used
* mostly by SurfaceFlinger, but also by command line GL application.
*
*/
FramebufferSurface::FramebufferSurface(HWComposer& hwc, DisplayId displayId,
const sp<IGraphicBufferConsumer>& consumer)
: ConsumerBase(consumer),
mDisplayId(displayId),
mCurrentBufferSlot(-1),
mCurrentBuffer(),
mCurrentFence(Fence::NO_FENCE),
mHwc(hwc),
mHasPendingRelease(false),
mPreviousBufferSlot(BufferQueue::INVALID_BUFFER_SLOT),
mPreviousBuffer() {
ALOGV("Creating for display %s", to_string(displayId).c_str());
mName = "FramebufferSurface";
mConsumer->setConsumerName(mName);
mConsumer->setConsumerUsageBits(GRALLOC_USAGE_HW_FB |
GRALLOC_USAGE_HW_RENDER |
GRALLOC_USAGE_HW_COMPOSER);
const auto& activeConfig = mHwc.getActiveConfig(displayId);
mConsumer->setDefaultBufferSize(activeConfig->getWidth(),
activeConfig->getHeight());
mConsumer->setMaxAcquiredBufferCount(
SurfaceFlinger::maxFrameBufferAcquiredBuffers - 1);
}
void FramebufferSurface::resizeBuffers(const uint32_t width, const uint32_t height) {
mConsumer->setDefaultBufferSize(width, height);
}
status_t FramebufferSurface::beginFrame(bool /*mustRecompose*/) {
return NO_ERROR;
}
status_t FramebufferSurface::prepareFrame(CompositionType /*compositionType*/) {
return NO_ERROR;
}
status_t FramebufferSurface::advanceFrame() {
uint32_t slot = 0;
sp<GraphicBuffer> buf;
sp<Fence> acquireFence(Fence::NO_FENCE);
Dataspace dataspace = Dataspace::UNKNOWN;
status_t result = nextBuffer(slot, buf, acquireFence, dataspace);
mDataSpace = dataspace;
if (result != NO_ERROR) {
ALOGE("error latching next FramebufferSurface buffer: %s (%d)",
strerror(-result), result);
}
return result;
}
status_t FramebufferSurface::nextBuffer(uint32_t& outSlot,
sp<GraphicBuffer>& outBuffer, sp<Fence>& outFence,
Dataspace& outDataspace) {
Mutex::Autolock lock(mMutex);
BufferItem item;
status_t err = acquireBufferLocked(&item, 0);
if (err == BufferQueue::NO_BUFFER_AVAILABLE) {
mHwcBufferCache.getHwcBuffer(mCurrentBufferSlot, mCurrentBuffer, &outSlot, &outBuffer);
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.mSlot != mCurrentBufferSlot) {
mHasPendingRelease = true;
mPreviousBufferSlot = mCurrentBufferSlot;
mPreviousBuffer = mCurrentBuffer;
}
mCurrentBufferSlot = item.mSlot;
mCurrentBuffer = mSlots[mCurrentBufferSlot].mGraphicBuffer;
mCurrentFence = item.mFence;
outFence = item.mFence;
mHwcBufferCache.getHwcBuffer(mCurrentBufferSlot, mCurrentBuffer, &outSlot, &outBuffer);
outDataspace = static_cast<Dataspace>(item.mDataSpace);
status_t result = mHwc.setClientTarget(mDisplayId, outSlot, outFence, outBuffer, outDataspace);
if (result != NO_ERROR) {
ALOGE("error posting framebuffer: %d", result);
return result;
}
return NO_ERROR;
}
void FramebufferSurface::freeBufferLocked(int slotIndex) {
ConsumerBase::freeBufferLocked(slotIndex);
if (slotIndex == mCurrentBufferSlot) {
mCurrentBufferSlot = BufferQueue::INVALID_BUFFER_SLOT;
}
}
void FramebufferSurface::onFrameCommitted() {
if (mHasPendingRelease) {
sp<Fence> fence = mHwc.getPresentFence(mDisplayId);
if (fence->isValid()) {
status_t result = addReleaseFence(mPreviousBufferSlot,
mPreviousBuffer, fence);
ALOGE_IF(result != NO_ERROR, "onFrameCommitted: failed to add the"
" fence: %s (%d)", strerror(-result), result);
}
status_t result = releaseBufferLocked(mPreviousBufferSlot, mPreviousBuffer);
ALOGE_IF(result != NO_ERROR, "onFrameCommitted: error releasing buffer:"
" %s (%d)", strerror(-result), result);
mPreviousBuffer.clear();
mHasPendingRelease = false;
}
}
void FramebufferSurface::dumpAsString(String8& result) const {
Mutex::Autolock lock(mMutex);
result.appendFormat(" FramebufferSurface: dataspace: %s(%d)\n",
dataspaceDetails(static_cast<android_dataspace>(mDataSpace)).c_str(),
mDataSpace);
ConsumerBase::dumpLocked(result, " ");
}
void FramebufferSurface::dumpLocked(String8& result, const char* prefix) const
{
ConsumerBase::dumpLocked(result, prefix);
}
const sp<Fence>& FramebufferSurface::getClientTargetAcquireFence() const {
return mCurrentFence;
}
// ----------------------------------------------------------------------------
}; // namespace android
// ----------------------------------------------------------------------------
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