b478362251
This is an optional library that winsys drivers can use to simplify memory management, and help meet the winsys interface requirements.
121 lines
3.1 KiB
C
121 lines
3.1 KiB
C
/**************************************************************************
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*
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* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/**
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* \file
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* Buffer handle interface.
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*
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* \author José Fonseca <jrfonseca@tungstengraphics.com>
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*/
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#ifndef PB_BUFFER_HANDLE_H_
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#define PB_BUFFER_HANDLE_H_
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#include <assert.h>
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#include "pb_buffer.h"
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/**
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* Buffer handle.
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*
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* The buffer handle and the buffer data storage are separate entities. This
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* is modelled after ARB_vertex_buffer_object, which is the interface that
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* Gallium requires. See p_winsys.h for more information.
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*/
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struct pipe_buffer_handle
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{
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/** Reference count */
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unsigned refcount;
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/** Allocation characteristics */
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unsigned alignment;
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unsigned flags;
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unsigned hint;
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/**
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* The actual buffer.
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*
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* It should never be NULL. Use null_buffer instead.
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*/
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struct pipe_buffer *buf;
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};
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/**
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* Set buffer storage.
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*
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* NOTE: this will not increase the buffer reference count.
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*/
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static inline void
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buffer_handle_data(struct pipe_buffer_handle *handle,
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struct pipe_buffer *buf)
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{
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assert(handle);
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assert(handle->buf);
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buffer_release(handle->buf);
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assert(buf);
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handle->buf = buf;
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}
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static inline void
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buffer_handle_clear(struct pipe_buffer_handle *handle)
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{
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buffer_handle_data(handle, &null_buffer);
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}
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static inline int
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buffer_handle_has_data(struct pipe_buffer_handle *handle) {
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assert(handle);
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assert(handle->buf);
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return handle->buf != &null_buffer;
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}
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/**
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* Fill in the pipe_winsys' buffer-related callbacks.
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*
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* Specifically, the fullfilled functions are:
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* - buffer_create
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* - user_buffer_create
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* - buffer_map
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* - buffer_unmap
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* - buffer_reference
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* - buffer_subdata
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* - buffer_get_subdata
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*
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* NOTE: buffer_data is left untouched.
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*/
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void
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buffer_handle_init_winsys(struct pipe_winsys *winsys);
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#endif /*PB_BUFFER_HANDLE_H_*/
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