/* * Copyright (C) 2010 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 * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef ANDROID_GUI_ISURFACETEXTURE_H #define ANDROID_GUI_ISURFACETEXTURE_H #include <stdint.h> #include <sys/types.h> #include <utils/Errors.h> #include <utils/RefBase.h> #include <binder/IInterface.h> #include <ui/GraphicBuffer.h> #include <ui/Rect.h> namespace android { // ---------------------------------------------------------------------------- class ISurfaceTexture : public IInterface { public: DECLARE_META_INTERFACE(SurfaceTexture); // requestBuffer requests a new buffer for the given index. The server (i.e. // the ISurfaceTexture implementation) assigns the newly created buffer to // the given slot index, and the client is expected to mirror the // slot->buffer mapping so that it's not necessary to transfer a // GraphicBuffer for every dequeue operation. virtual sp<GraphicBuffer> requestBuffer(int slot, uint32_t w, uint32_t h, uint32_t format, uint32_t usage) = 0; // setBufferCount sets the number of buffer slots available. Calling this // will also cause all buffer slots to be emptied. The caller should empty // its mirrored copy of the buffer slots when calling this method. virtual status_t setBufferCount(int bufferCount) = 0; // dequeueBuffer requests a new buffer slot for the client to use. Ownership // of the slot is transfered to the client, meaning that the server will not // use the contents of the buffer associated with that slot. The slot index // returned may or may not contain a buffer. If the slot is empty the client // should call requestBuffer to assign a new buffer to that slot. The client // is expected to either call cancelBuffer on the dequeued slot or to fill // in the contents of its associated buffer contents and call queueBuffer. virtual status_t dequeueBuffer(int *slot) = 0; // queueBuffer indicates that the client has finished filling in the // contents of the buffer associated with slot and transfers ownership of // that slot back to the server. It is not valid to call queueBuffer on a // slot that is not owned by the client or one for which a buffer associated // via requestBuffer. virtual status_t queueBuffer(int slot) = 0; // cancelBuffer indicates that the client does not wish to fill in the // buffer associated with slot and transfers ownership of the slot back to // the server. virtual void cancelBuffer(int slot) = 0; virtual status_t setCrop(const Rect& reg) = 0; virtual status_t setTransform(uint32_t transform) = 0; }; // ---------------------------------------------------------------------------- class BnSurfaceTexture : public BnInterface<ISurfaceTexture> { public: virtual status_t onTransact( uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags = 0); }; // ---------------------------------------------------------------------------- }; // namespace android #endif // ANDROID_GUI_ISURFACETEXTURE_H