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88 lines
3.0 KiB
88 lines
3.0 KiB
7 months ago
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/*
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* Copyright 2019 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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#pragma once
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#include <EGL/egl.h>
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#include <EGL/eglext.h>
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#include <cutils/compiler.h>
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#include <gui/BufferItem.h>
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#include <gui/BufferQueueDefs.h>
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#include <sys/cdefs.h>
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#include <system/graphics.h>
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namespace android {
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class SurfaceTexture;
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class DequeueBufferCallbacks;
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/*
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* ImageConsumer implements the parts of SurfaceTexture that deal with
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* images consumed by HWUI view system.
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*/
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class ImageConsumer {
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public:
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typedef status_t (*SurfaceTexture_createReleaseFence)(bool useFenceSync, EGLSyncKHR* eglFence,
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EGLDisplay* display, int* releaseFence,
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void* fencePassThroughHandle);
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typedef status_t (*SurfaceTexture_fenceWait)(int fence, void* fencePassThroughHandle);
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sp<GraphicBuffer> dequeueBuffer(int* outSlotid, android_dataspace* outDataspace,
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bool* outQueueEmpty, SurfaceTexture& cb,
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SurfaceTexture_createReleaseFence createFence,
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SurfaceTexture_fenceWait fenceWait,
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void* fencePassThroughHandle);
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/**
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* onReleaseBufferLocked amends the ConsumerBase method to update the
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* mImageSlots array in addition to the ConsumerBase.
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*/
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void onReleaseBufferLocked(int slot);
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private:
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/**
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* ImageSlot contains the information and object references that
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* ImageConsumer maintains about a BufferQueue buffer slot.
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*/
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class ImageSlot {
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public:
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ImageSlot() : mEglFence(EGL_NO_SYNC_KHR) {}
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inline EGLSyncKHR& eglFence() { return mEglFence; }
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private:
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/**
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* mEglFence is the EGL sync object that must signal before the buffer
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* associated with this buffer slot may be dequeued.
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*/
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EGLSyncKHR mEglFence;
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};
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/**
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* ImageConsumer stores the SkImages that have been allocated by the BufferQueue
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* for each buffer slot. It is initialized to null pointers, and gets
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* filled in with the result of BufferQueue::acquire when the
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* client dequeues a buffer from a
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* slot that has not yet been used. The buffer allocated to a slot will also
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* be replaced if the requested buffer usage or geometry differs from that
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* of the buffer allocated to a slot.
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*/
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ImageSlot mImageSlots[BufferQueueDefs::NUM_BUFFER_SLOTS];
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};
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} /* namespace android */
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