diff options
Diffstat (limited to 'src/mesa/pipe/pipebuffer/pb_winsys.c')
-rw-r--r-- | src/mesa/pipe/pipebuffer/pb_winsys.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/src/mesa/pipe/pipebuffer/pb_winsys.c b/src/mesa/pipe/pipebuffer/pb_winsys.c new file mode 100644 index 0000000000..978944091f --- /dev/null +++ b/src/mesa/pipe/pipebuffer/pb_winsys.c @@ -0,0 +1,170 @@ +/************************************************************************** + * + * 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 + * Implementation of client buffer (also designated as "user buffers"), which + * are just state-tracker owned data masqueraded as buffers. + * + * \author José Fonseca <jrfonseca@tungstengraphics.com> + */ + + +#include "pipe/p_winsys.h" +#include "pipe/p_util.h" + +#include "pb_buffer.h" + + +/** + * User buffers are special buffers that initially reference memory + * held by the user but which may if necessary copy that memory into + * device memory behind the scenes, for submission to hardware. + * + * These are particularly useful when the referenced data is never + * submitted to hardware at all, in the particular case of software + * vertex processing. + */ +struct pb_user_buffer +{ + struct pb_buffer base; + void *data; +}; + + +extern const struct pb_vtbl pb_user_buffer_vtbl; + + +static INLINE struct pb_user_buffer * +pb_user_buffer(struct pb_buffer *buf) +{ + assert(buf); + assert(buf->vtbl == &pb_user_buffer_vtbl); + return (struct pb_user_buffer *)buf; +} + + +static void +pb_user_buffer_destroy(struct pb_buffer *buf) +{ + assert(buf); + FREE(buf); +} + + +static void * +pb_user_buffer_map(struct pb_buffer *buf, + unsigned flags) +{ + return pb_user_buffer(buf)->data; +} + + +static void +pb_user_buffer_unmap(struct pb_buffer *buf) +{ + /* No-op */ +} + + +static void +pb_user_buffer_get_base_buffer(struct pb_buffer *buf, + struct pb_buffer **base_buf, + unsigned *offset) +{ + *base_buf = buf; + *offset = 0; +} + + +const struct pb_vtbl +pb_user_buffer_vtbl = { + pb_user_buffer_destroy, + pb_user_buffer_map, + pb_user_buffer_unmap, + pb_user_buffer_get_base_buffer +}; + + +static struct pipe_buffer * +pb_winsys_user_buffer_create(struct pipe_winsys *winsys, + void *data, + unsigned bytes) +{ + struct pb_user_buffer *buf = CALLOC_STRUCT(pb_user_buffer); + + if(!buf) + return NULL; + + buf->base.base.refcount = 1; + buf->base.base.size = bytes; + buf->base.base.alignment = 0; + buf->base.base.usage = 0; + + buf->base.vtbl = &pb_user_buffer_vtbl; + buf->data = data; + + return &buf->base.base; +} + + +static void * +pb_winsys_buffer_map(struct pipe_winsys *winsys, + struct pipe_buffer *buf, + unsigned flags) +{ + (void)winsys; + return pb_map(pb_buffer(buf), flags); +} + + +static void +pb_winsys_buffer_unmap(struct pipe_winsys *winsys, + struct pipe_buffer *buf) +{ + (void)winsys; + pb_unmap(pb_buffer(buf)); +} + + +static void +pb_winsys_buffer_destroy(struct pipe_winsys *winsys, + struct pipe_buffer *buf) +{ + (void)winsys; + pb_destroy(pb_buffer(buf)); +} + + +void +pb_init_winsys(struct pipe_winsys *winsys) +{ + winsys->user_buffer_create = pb_winsys_user_buffer_create; + winsys->buffer_map = pb_winsys_buffer_map; + winsys->buffer_unmap = pb_winsys_buffer_unmap; + winsys->buffer_destroy = pb_winsys_buffer_destroy; +} |