upload android base code part1
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android/frameworks/native/libs/gui/BufferItem.cpp
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254
android/frameworks/native/libs/gui/BufferItem.cpp
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/*
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* Copyright 2014 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 <gui/BufferItem.h>
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#include <ui/Fence.h>
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#include <ui/GraphicBuffer.h>
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#include <system/window.h>
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namespace android {
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template<typename T>
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static inline constexpr uint32_t low32(const T n) {
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return static_cast<uint32_t>(static_cast<uint64_t>(n));
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}
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template<typename T>
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static inline constexpr uint32_t high32(const T n) {
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return static_cast<uint32_t>(static_cast<uint64_t>(n)>>32);
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}
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template<typename T>
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static inline constexpr T to64(const uint32_t lo, const uint32_t hi) {
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return static_cast<T>(static_cast<uint64_t>(hi)<<32 | lo);
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}
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BufferItem::BufferItem() :
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mGraphicBuffer(NULL),
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mFence(NULL),
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mCrop(Rect::INVALID_RECT),
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mTransform(0),
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mScalingMode(NATIVE_WINDOW_SCALING_MODE_FREEZE),
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mTimestamp(0),
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mIsAutoTimestamp(false),
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mDataSpace(HAL_DATASPACE_UNKNOWN),
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mFrameNumber(0),
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mSlot(INVALID_BUFFER_SLOT),
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mIsDroppable(false),
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mAcquireCalled(false),
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mTransformToDisplayInverse(false),
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mSurfaceDamage(),
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mAutoRefresh(false),
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mQueuedBuffer(true),
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mIsStale(false) {
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}
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BufferItem::~BufferItem() {}
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template <typename T>
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static void addAligned(size_t& size, T /* value */) {
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size = FlattenableUtils::align<sizeof(T)>(size);
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size += sizeof(T);
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}
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size_t BufferItem::getPodSize() const {
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size_t size = 0;
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addAligned(size, mCrop);
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addAligned(size, mTransform);
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addAligned(size, mScalingMode);
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addAligned(size, low32(mTimestamp));
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addAligned(size, high32(mTimestamp));
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addAligned(size, mIsAutoTimestamp);
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addAligned(size, mDataSpace);
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addAligned(size, low32(mFrameNumber));
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addAligned(size, high32(mFrameNumber));
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addAligned(size, mSlot);
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addAligned(size, mIsDroppable);
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addAligned(size, mAcquireCalled);
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addAligned(size, mTransformToDisplayInverse);
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addAligned(size, mAutoRefresh);
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addAligned(size, mQueuedBuffer);
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addAligned(size, mIsStale);
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return size;
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}
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size_t BufferItem::getFlattenedSize() const {
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size_t size = sizeof(uint32_t); // Flags
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if (mGraphicBuffer != 0) {
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size += mGraphicBuffer->getFlattenedSize();
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size = FlattenableUtils::align<4>(size);
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}
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if (mFence != 0) {
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size += mFence->getFlattenedSize();
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size = FlattenableUtils::align<4>(size);
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}
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size += mSurfaceDamage.getFlattenedSize();
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size = FlattenableUtils::align<8>(size);
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return size + getPodSize();
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}
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size_t BufferItem::getFdCount() const {
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size_t count = 0;
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if (mGraphicBuffer != 0) {
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count += mGraphicBuffer->getFdCount();
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}
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if (mFence != 0) {
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count += mFence->getFdCount();
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}
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return count;
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}
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template <typename T>
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static void writeAligned(void*& buffer, size_t& size, T value) {
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size -= FlattenableUtils::align<alignof(T)>(buffer);
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FlattenableUtils::write(buffer, size, value);
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}
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status_t BufferItem::flatten(
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void*& buffer, size_t& size, int*& fds, size_t& count) const {
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// make sure we have enough space
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if (size < BufferItem::getFlattenedSize()) {
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return NO_MEMORY;
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}
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// content flags are stored first
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uint32_t& flags = *static_cast<uint32_t*>(buffer);
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// advance the pointer
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FlattenableUtils::advance(buffer, size, sizeof(uint32_t));
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flags = 0;
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if (mGraphicBuffer != 0) {
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status_t err = mGraphicBuffer->flatten(buffer, size, fds, count);
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if (err) return err;
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size -= FlattenableUtils::align<4>(buffer);
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flags |= 1;
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}
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if (mFence != 0) {
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status_t err = mFence->flatten(buffer, size, fds, count);
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if (err) return err;
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size -= FlattenableUtils::align<4>(buffer);
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flags |= 2;
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}
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status_t err = mSurfaceDamage.flatten(buffer, size);
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if (err) return err;
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FlattenableUtils::advance(buffer, size, mSurfaceDamage.getFlattenedSize());
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// Check we still have enough space
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if (size < getPodSize()) {
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return NO_MEMORY;
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}
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writeAligned(buffer, size, mCrop);
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writeAligned(buffer, size, mTransform);
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writeAligned(buffer, size, mScalingMode);
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writeAligned(buffer, size, low32(mTimestamp));
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writeAligned(buffer, size, high32(mTimestamp));
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writeAligned(buffer, size, mIsAutoTimestamp);
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writeAligned(buffer, size, mDataSpace);
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writeAligned(buffer, size, low32(mFrameNumber));
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writeAligned(buffer, size, high32(mFrameNumber));
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writeAligned(buffer, size, mSlot);
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writeAligned(buffer, size, mIsDroppable);
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writeAligned(buffer, size, mAcquireCalled);
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writeAligned(buffer, size, mTransformToDisplayInverse);
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writeAligned(buffer, size, mAutoRefresh);
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writeAligned(buffer, size, mQueuedBuffer);
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writeAligned(buffer, size, mIsStale);
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return NO_ERROR;
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}
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template <typename T>
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static void readAligned(const void*& buffer, size_t& size, T& value) {
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size -= FlattenableUtils::align<alignof(T)>(buffer);
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FlattenableUtils::read(buffer, size, value);
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}
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status_t BufferItem::unflatten(
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void const*& buffer, size_t& size, int const*& fds, size_t& count) {
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if (size < sizeof(uint32_t)) {
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return NO_MEMORY;
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}
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uint32_t flags = 0;
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FlattenableUtils::read(buffer, size, flags);
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if (flags & 1) {
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mGraphicBuffer = new GraphicBuffer();
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status_t err = mGraphicBuffer->unflatten(buffer, size, fds, count);
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if (err) return err;
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size -= FlattenableUtils::align<4>(buffer);
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}
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if (flags & 2) {
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mFence = new Fence();
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status_t err = mFence->unflatten(buffer, size, fds, count);
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if (err) return err;
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size -= FlattenableUtils::align<4>(buffer);
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mFenceTime = std::make_shared<FenceTime>(mFence);
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}
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status_t err = mSurfaceDamage.unflatten(buffer, size);
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if (err) return err;
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FlattenableUtils::advance(buffer, size, mSurfaceDamage.getFlattenedSize());
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// Check we still have enough space
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if (size < getPodSize()) {
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return NO_MEMORY;
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}
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uint32_t timestampLo = 0, timestampHi = 0;
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uint32_t frameNumberLo = 0, frameNumberHi = 0;
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readAligned(buffer, size, mCrop);
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readAligned(buffer, size, mTransform);
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readAligned(buffer, size, mScalingMode);
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readAligned(buffer, size, timestampLo);
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readAligned(buffer, size, timestampHi);
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mTimestamp = to64<int64_t>(timestampLo, timestampHi);
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readAligned(buffer, size, mIsAutoTimestamp);
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readAligned(buffer, size, mDataSpace);
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readAligned(buffer, size, frameNumberLo);
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readAligned(buffer, size, frameNumberHi);
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mFrameNumber = to64<uint64_t>(frameNumberLo, frameNumberHi);
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readAligned(buffer, size, mSlot);
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readAligned(buffer, size, mIsDroppable);
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readAligned(buffer, size, mAcquireCalled);
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readAligned(buffer, size, mTransformToDisplayInverse);
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readAligned(buffer, size, mAutoRefresh);
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readAligned(buffer, size, mQueuedBuffer);
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readAligned(buffer, size, mIsStale);
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return NO_ERROR;
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}
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const char* BufferItem::scalingModeName(uint32_t scalingMode) {
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switch (scalingMode) {
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case NATIVE_WINDOW_SCALING_MODE_FREEZE: return "FREEZE";
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case NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW: return "SCALE_TO_WINDOW";
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case NATIVE_WINDOW_SCALING_MODE_SCALE_CROP: return "SCALE_CROP";
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default: return "Unknown";
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}
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}
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} // namespace android
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