| /************************************************************************** |
| * |
| * 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; |
| } |
| |