1 /* 2 * Copyright (C) 2019 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 #pragma once 18 19 #include <utils/RefBase.h> 20 21 #include <ui/PixelFormat.h> 22 23 #include <utils/Errors.h> 24 25 namespace android { 26 27 class BufferItem; 28 class Fence; 29 class GraphicBuffer; 30 31 class IGraphicBufferConsumer : virtual public RefBase { 32 public: 33 enum { 34 // Returned by releaseBuffer, after which the consumer must free any references to the 35 // just-released buffer that it might have. 36 STALE_BUFFER_SLOT = 1, 37 // Returned by dequeueBuffer if there are no pending buffers available. 38 NO_BUFFER_AVAILABLE, 39 // Returned by dequeueBuffer if it's too early for the buffer to be acquired. 40 PRESENT_LATER, 41 }; 42 43 virtual status_t acquireBuffer(BufferItem* buffer, nsecs_t presentWhen, 44 uint64_t maxFrameNumber = 0) = 0; 45 46 virtual status_t detachBuffer(int slot) = 0; 47 48 virtual status_t getReleasedBuffers(uint64_t* slotMask) = 0; 49 50 virtual status_t setDefaultBufferSize(uint32_t w, uint32_t h) = 0; 51 52 virtual status_t setMaxAcquiredBufferCount(int maxAcquiredBuffers) = 0; 53 54 virtual status_t setDefaultBufferFormat(PixelFormat defaultFormat) = 0; 55 56 virtual status_t setDefaultBufferDataSpace(android_dataspace defaultDataSpace) = 0; 57 58 virtual status_t setConsumerUsageBits(uint64_t usage) = 0; 59 60 virtual status_t setConsumerIsProtected(bool isProtected) = 0; 61 62 virtual status_t discardFreeBuffers() = 0; 63 }; 64 65 } // namespace android