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/**************************************************************************
*
* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
*
* 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, sub license, 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 (including the
* next paragraph) 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 NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.
*
**************************************************************************/
/**
* \file
* Drop-in implementation of the winsys driver functions for buffer handles.
*
* \author José Fonseca <jrfonseca@tungstengraphics.com>
*/
#include <assert.h>
#include <stdlib.h>
#include "pipe/p_winsys.h"
#include "pipe/p_defines.h"
#include "pb_buffer.h"
#include "pb_buffer_handle.h"
static struct pipe_buffer_handle *
buffer_handle_create(struct pipe_winsys *winsys,
unsigned alignment,
unsigned flags,
unsigned hint)
{
struct pipe_buffer_handle *handle;
handle = (struct pipe_buffer_handle *)malloc(sizeof(struct pipe_buffer_handle));
if(!handle)
return NULL;
handle->refcount = 1;
handle->alignment = alignment;
handle->flags = flags;
handle->hint = hint;
handle->buf = &null_buffer;
return handle;
}
static struct pipe_buffer_handle *
buffer_handle_create_user(struct pipe_winsys *winsys,
void *data, unsigned size)
{
struct pipe_buffer_handle *handle;
struct pipe_buffer *buf;
handle = buffer_handle_create(winsys, 1, 0, 0);
if(!handle)
return NULL;
buf = client_buffer_create(data);
if(!buf) {
free(handle);
return NULL;
}
buffer_handle_data(handle, buf);
return handle;
}
static void *
buffer_handle_map(struct pipe_winsys *winsys,
struct pipe_buffer_handle *handle,
unsigned flags)
{
return buffer_map(handle->buf, flags);
}
static void
buffer_handle_unmap(struct pipe_winsys *winsys,
struct pipe_buffer_handle *handle)
{
buffer_unmap(handle->buf);
}
static void
buffer_handle_reference(struct pipe_winsys *winsys,
struct pipe_buffer_handle **dst,
struct pipe_buffer_handle *src)
{
/* XXX: should this be thread safe? */
if (src) {
src->refcount++;
}
if (*dst) {
(*dst)->refcount--;
if ((*dst)->refcount == 0) {
buffer_release((*dst)->buf);
free(*dst);
}
}
*dst = src;
}
static int
buffer_handle_subdata(struct pipe_winsys *winsys,
struct pipe_buffer_handle *handle,
unsigned long offset,
unsigned long size,
const void *data)
{
void *map;
assert(handle);
assert(data);
map = buffer_handle_map(winsys, handle, PIPE_BUFFER_FLAG_WRITE);
if(map) {
memcpy((char *)map + offset, data, size);
buffer_handle_unmap(winsys, handle);
return 0;
}
return -1;
}
static int
buffer_handle_get_subdata(struct pipe_winsys *winsys,
struct pipe_buffer_handle *handle,
unsigned long offset,
unsigned long size,
void *data)
{
void *map;
assert(handle);
assert(data);
map = buffer_handle_map(winsys, handle, PIPE_BUFFER_FLAG_READ);
if(map) {
memcpy(data, (char *)map + offset, size);
buffer_handle_unmap(winsys, handle);
return 0;
}
return -1;
}
void
buffer_handle_init_winsys(struct pipe_winsys *winsys)
{
winsys->buffer_create = buffer_handle_create;
winsys->user_buffer_create = buffer_handle_create_user;
winsys->buffer_map = buffer_handle_map;
winsys->buffer_unmap = buffer_handle_unmap;
winsys->buffer_reference = buffer_handle_reference;
winsys->buffer_subdata = buffer_handle_subdata;
winsys->buffer_get_subdata = buffer_handle_get_subdata;
}
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