1 /* 2 * Copyright 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_GUI_BUFFERITEM_H 18 #define ANDROID_GUI_BUFFERITEM_H 19 20 #include <EGL/egl.h> 21 #include <EGL/eglext.h> 22 23 #include <gui/IGraphicBufferConsumer.h> 24 25 #include <ui/Rect.h> 26 27 #include <utils/Flattenable.h> 28 #include <utils/StrongPointer.h> 29 30 namespace android { 31 32 class Fence; 33 class GraphicBuffer; 34 35 class BufferItem : public Flattenable<BufferItem> { 36 friend class Flattenable<BufferItem>; 37 size_t getPodSize() const; 38 size_t getFlattenedSize() const; 39 size_t getFdCount() const; 40 status_t flatten(void*& buffer, size_t& size, int*& fds, size_t& count) const; 41 status_t unflatten(void const*& buffer, size_t& size, int const*& fds, size_t& count); 42 43 public: 44 // The default value of mBuf, used to indicate this doesn't correspond to a slot. 45 enum { INVALID_BUFFER_SLOT = -1 }; 46 BufferItem(); 47 operator IGraphicBufferConsumer::BufferItem() const; 48 49 static const char* scalingModeName(uint32_t scalingMode); 50 51 // mGraphicBuffer points to the buffer allocated for this slot, or is NULL 52 // if the buffer in this slot has been acquired in the past (see 53 // BufferSlot.mAcquireCalled). 54 sp<GraphicBuffer> mGraphicBuffer; 55 56 // mFence is a fence that will signal when the buffer is idle. 57 sp<Fence> mFence; 58 59 // mCrop is the current crop rectangle for this buffer slot. 60 Rect mCrop; 61 62 // mTransform is the current transform flags for this buffer slot. 63 // refer to NATIVE_WINDOW_TRANSFORM_* in <window.h> 64 uint32_t mTransform; 65 66 // mScalingMode is the current scaling mode for this buffer slot. 67 // refer to NATIVE_WINDOW_SCALING_* in <window.h> 68 uint32_t mScalingMode; 69 70 // mTimestamp is the current timestamp for this buffer slot. This gets 71 // to set by queueBuffer each time this slot is queued. This value 72 // is guaranteed to be monotonically increasing for each newly 73 // acquired buffer. 74 int64_t mTimestamp; 75 76 // mIsAutoTimestamp indicates whether mTimestamp was generated 77 // automatically when the buffer was queued. 78 bool mIsAutoTimestamp; 79 80 // mFrameNumber is the number of the queued frame for this slot. 81 uint64_t mFrameNumber; 82 83 // mSlot is the slot index of this buffer (default INVALID_BUFFER_SLOT). 84 int mSlot; 85 86 // mIsDroppable whether this buffer was queued with the 87 // property that it can be replaced by a new buffer for the purpose of 88 // making sure dequeueBuffer() won't block. 89 // i.e.: was the BufferQueue in "mDequeueBufferCannotBlock" when this buffer 90 // was queued. 91 bool mIsDroppable; 92 93 // Indicates whether this buffer has been seen by a consumer yet 94 bool mAcquireCalled; 95 96 // Indicates this buffer must be transformed by the inverse transform of the screen 97 // it is displayed onto. This is applied after mTransform. 98 bool mTransformToDisplayInverse; 99 }; 100 101 } // namespace android 102 103 #endif 104
