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/*
* Copyright 2014 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 <gui/BufferItem.h>
#include <ui/Fence.h>
#include <ui/GraphicBuffer.h>
#include <system/window.h>
namespace android {
BufferItem::BufferItem() :
mTransform(0),
mScalingMode(NATIVE_WINDOW_SCALING_MODE_FREEZE),
mTimestamp(0),
mIsAutoTimestamp(false),
mDataSpace(HAL_DATASPACE_UNKNOWN),
mFrameNumber(0),
mSlot(INVALID_BUFFER_SLOT),
mIsDroppable(false),
mAcquireCalled(false),
mTransformToDisplayInverse(false) {
mCrop.makeInvalid();
}
BufferItem::~BufferItem() {}
template <typename T>
static void addAligned(size_t& size, T /* value */) {
size = FlattenableUtils::align<sizeof(T)>(size);
size += sizeof(T);
}
size_t BufferItem::getPodSize() const {
// Must align<8> before writing these fields for this to be correct
size_t size = 0;
addAligned(size, mCrop);
addAligned(size, mTransform);
addAligned(size, mScalingMode);
addAligned(size, mTimestamp);
addAligned(size, mIsAutoTimestamp);
addAligned(size, mDataSpace);
addAligned(size, mFrameNumber);
addAligned(size, mSlot);
addAligned(size, mIsDroppable);
addAligned(size, mAcquireCalled);
addAligned(size, mTransformToDisplayInverse);
return size;
}
size_t BufferItem::getFlattenedSize() const {
size_t size = sizeof(uint32_t); // Flags
if (mGraphicBuffer != 0) {
size += mGraphicBuffer->getFlattenedSize();
FlattenableUtils::align<4>(size);
}
if (mFence != 0) {
size += mFence->getFlattenedSize();
FlattenableUtils::align<4>(size);
}
size += mSurfaceDamage.getFlattenedSize();
size = FlattenableUtils::align<8>(size);
return size + getPodSize();
}
size_t BufferItem::getFdCount() const {
size_t count = 0;
if (mGraphicBuffer != 0) {
count += mGraphicBuffer->getFdCount();
}
if (mFence != 0) {
count += mFence->getFdCount();
}
return count;
}
template <typename T>
static void writeAligned(void*& buffer, size_t& size, T value) {
size -= FlattenableUtils::align<alignof(T)>(buffer);
FlattenableUtils::write(buffer, size, value);
}
status_t BufferItem::flatten(
void*& buffer, size_t& size, int*& fds, size_t& count) const {
// make sure we have enough space
if (size < BufferItem::getFlattenedSize()) {
return NO_MEMORY;
}
// content flags are stored first
uint32_t& flags = *static_cast<uint32_t*>(buffer);
// advance the pointer
FlattenableUtils::advance(buffer, size, sizeof(uint32_t));
flags = 0;
if (mGraphicBuffer != 0) {
status_t err = mGraphicBuffer->flatten(buffer, size, fds, count);
if (err) return err;
size -= FlattenableUtils::align<4>(buffer);
flags |= 1;
}
if (mFence != 0) {
status_t err = mFence->flatten(buffer, size, fds, count);
if (err) return err;
size -= FlattenableUtils::align<4>(buffer);
flags |= 2;
}
status_t err = mSurfaceDamage.flatten(buffer, size);
if (err) return err;
FlattenableUtils::advance(buffer, size, mSurfaceDamage.getFlattenedSize());
// Must align<8> so that getPodSize returns the correct value
size -= FlattenableUtils::align<8>(buffer);
// Check we still have enough space
if (size < getPodSize()) {
return NO_MEMORY;
}
writeAligned(buffer, size, mCrop);
writeAligned(buffer, size, mTransform);
writeAligned(buffer, size, mScalingMode);
writeAligned(buffer, size, mTimestamp);
writeAligned(buffer, size, mIsAutoTimestamp);
writeAligned(buffer, size, mDataSpace);
writeAligned(buffer, size, mFrameNumber);
writeAligned(buffer, size, mSlot);
writeAligned(buffer, size, mIsDroppable);
writeAligned(buffer, size, mAcquireCalled);
writeAligned(buffer, size, mTransformToDisplayInverse);
return NO_ERROR;
}
template <typename T>
static void readAligned(const void*& buffer, size_t& size, T& value) {
size -= FlattenableUtils::align<alignof(T)>(buffer);
FlattenableUtils::read(buffer, size, value);
}
status_t BufferItem::unflatten(
void const*& buffer, size_t& size, int const*& fds, size_t& count) {
if (size < sizeof(uint32_t)) {
return NO_MEMORY;
}
uint32_t flags = 0;
FlattenableUtils::read(buffer, size, flags);
if (flags & 1) {
mGraphicBuffer = new GraphicBuffer();
status_t err = mGraphicBuffer->unflatten(buffer, size, fds, count);
if (err) return err;
size -= FlattenableUtils::align<4>(buffer);
}
if (flags & 2) {
mFence = new Fence();
status_t err = mFence->unflatten(buffer, size, fds, count);
if (err) return err;
size -= FlattenableUtils::align<4>(buffer);
}
status_t err = mSurfaceDamage.unflatten(buffer, size);
if (err) return err;
FlattenableUtils::advance(buffer, size, mSurfaceDamage.getFlattenedSize());
// Must align<8> so that getPodSize returns the correct value
size -= FlattenableUtils::align<8>(buffer);
// Check we still have enough space
if (size < getPodSize()) {
return NO_MEMORY;
}
readAligned(buffer, size, mCrop);
readAligned(buffer, size, mTransform);
readAligned(buffer, size, mScalingMode);
readAligned(buffer, size, mTimestamp);
readAligned(buffer, size, mIsAutoTimestamp);
readAligned(buffer, size, mDataSpace);
readAligned(buffer, size, mFrameNumber);
readAligned(buffer, size, mSlot);
readAligned(buffer, size, mIsDroppable);
readAligned(buffer, size, mAcquireCalled);
readAligned(buffer, size, mTransformToDisplayInverse);
return NO_ERROR;
}
const char* BufferItem::scalingModeName(uint32_t scalingMode) {
switch (scalingMode) {
case NATIVE_WINDOW_SCALING_MODE_FREEZE: return "FREEZE";
case NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW: return "SCALE_TO_WINDOW";
case NATIVE_WINDOW_SCALING_MODE_SCALE_CROP: return "SCALE_CROP";
default: return "Unknown";
}
}
} // namespace android
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