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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
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <ui/Rect.h>
#include <ui/Region.h>
#include <system/graphics.h>
#include <utils/Flattenable.h>
#include <utils/StrongPointer.h>
namespace android {
class Fence;
class GraphicBuffer;
class BufferItem : public Flattenable<BufferItem> {
friend class Flattenable<BufferItem>;
size_t getPodSize() const;
size_t getFlattenedSize() const;
size_t getFdCount() const;
status_t flatten(void*& buffer, size_t& size, int*& fds, size_t& count) const;
status_t unflatten(void const*& buffer, size_t& size, int const*& fds, size_t& count);
// The default value of mBuf, used to indicate this doesn't correspond to a slot.
enum { INVALID_BUFFER_SLOT = -1 };
static const char* scalingModeName(uint32_t scalingMode);
// mGraphicBuffer points to the buffer allocated for this slot, or is NULL
// if the buffer in this slot has been acquired in the past (see
// BufferSlot.mAcquireCalled).
sp<GraphicBuffer> mGraphicBuffer;
// mFence is a fence that will signal when the buffer is idle.
sp<Fence> mFence;
// mCrop is the current crop rectangle for this buffer slot.
Rect mCrop;
// mTransform is the current transform flags for this buffer slot.
// refer to NATIVE_WINDOW_TRANSFORM_* in <window.h>
uint32_t mTransform;
// mScalingMode is the current scaling mode for this buffer slot.
// refer to NATIVE_WINDOW_SCALING_* in <window.h>
uint32_t mScalingMode;
// mTimestamp is the current timestamp for this buffer slot. This gets
// to set by queueBuffer each time this slot is queued. This value
// is guaranteed to be monotonically increasing for each newly
// acquired buffer.
union {
int64_t mTimestamp;
struct {
uint32_t mTimestampLo;
uint32_t mTimestampHi;
// mIsAutoTimestamp indicates whether mTimestamp was generated
// automatically when the buffer was queued.
bool mIsAutoTimestamp;
// mDataSpace is the current dataSpace value for this buffer slot. This gets
// set by queueBuffer each time this slot is queued. The meaning of the
// dataSpace is format-dependent.
android_dataspace mDataSpace;
// mFrameNumber is the number of the queued frame for this slot.
union {
uint64_t mFrameNumber;
struct {
uint32_t mFrameNumberLo;
uint32_t mFrameNumberHi;
union {
// mSlot is the slot index of this buffer (default INVALID_BUFFER_SLOT).
int mSlot;
// mBuf is the former name for mSlot
int mBuf;
// mIsDroppable whether this buffer was queued with the
// property that it can be replaced by a new buffer for the purpose of
// making sure dequeueBuffer() won't block.
// i.e.: was the BufferQueue in "mDequeueBufferCannotBlock" when this buffer
// was queued.
bool mIsDroppable;
// Indicates whether this buffer has been seen by a consumer yet
bool mAcquireCalled;
// Indicates this buffer must be transformed by the inverse transform of the screen
// it is displayed onto. This is applied after mTransform.
bool mTransformToDisplayInverse;
// Describes the portion of the surface that has been modified since the
// previous frame
Region mSurfaceDamage;
} // namespace android