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Add buffer.c to cover cairo-surface to wlr_buffer

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Johan Malm 2022-02-11 22:19:05 +00:00
parent 3d6e942eee
commit d2552232c7
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include/buffer.h Normal file
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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Based on wlroots/include/types/wlr_buffer.c
*
* Copyright (c) 2017, 2018 Drew DeVault
* Copyright (c) 2018-2021 Simon Ser, Simon Zeni
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef __LABWC_BUFFER_H
#define __LABWC_BUFFER_H
#include "labwc.h"
/**
* A read-only buffer that holds a data pointer.
*
* This is suitable for passing raw pixel data to a function that accepts a
* wlr_buffer.
*/
struct lab_data_buffer {
struct wlr_buffer base;
const void *data;
uint32_t format;
size_t stride;
void *saved_data;
};
/**
* Wraps a read-only data pointer into a wlr_buffer. The data pointer may be
* accessed until readonly_data_buffer_drop() is called.
*/
struct lab_data_buffer *buffer_create(uint32_t format, size_t stride,
uint32_t width, uint32_t height, const void *data);
/**
* Drops ownership of the buffer (see wlr_buffer_drop() for more details) and
* perform a copy of the data pointer if a consumer still has the buffer locked.
*/
bool buffer_drop(struct lab_data_buffer *buffer);
#endif /* __LABWC_BUFFER_H */