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/**************************************************************************
*
* Copyright 2006 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.
*
**************************************************************************/
/* Provide additional functionality on top of bufmgr buffers:
* - 2d semantics and blit operations (XXX: remove/simplify blits??)
* - refcounting of buffers for multiple images in a buffer.
* - refcounting of buffer mappings.
*/
#include "pipe/p_defines.h"
#include "pipe/p_winsys.h"
#include "i915_context.h"
static ubyte *
i915_region_map(struct pipe_context *pipe, struct pipe_region *region)
{
struct i915_context *i915 = i915_context( pipe );
if (!region->map_refcount++) {
region->map = i915->pipe.winsys->buffer_map( i915->pipe.winsys,
region->buffer,
PIPE_BUFFER_FLAG_WRITE |
PIPE_BUFFER_FLAG_READ);
}
return region->map;
}
static void
i915_region_unmap(struct pipe_context *pipe, struct pipe_region *region)
{
struct i915_context *i915 = i915_context( pipe );
if (region->map_refcount > 0) {
assert(region->map);
if (!--region->map_refcount) {
i915->pipe.winsys->buffer_unmap( i915->pipe.winsys,
region->buffer );
region->map = NULL;
}
}
}
void
i915_init_region_functions(struct i915_context *i915)
{
i915->pipe.region_map = i915_region_map;
i915->pipe.region_unmap = i915_region_unmap;
}
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