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mesa: Massage the interface to more closely resemble ARB_map_buffer_range

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This commit is contained in:
José Fonseca
2009-03-03 18:52:51 +00:00
parent 190db8b4c3
commit 004d8f1188
2 changed files with 9 additions and 7 deletions
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9
src/mesa/state_tracker/st_cb_bufferobjects.c
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@@ -218,6 +218,7 @@ st_bufferobj_map_range(GLcontext *ctx, GLenum target,
struct pipe_context *pipe = st_context(ctx)->pipe;
struct st_buffer_object *st_obj = st_buffer_object(obj);
GLuint flags = 0;
char *map;
if (access & GL_MAP_WRITE_BIT)
flags |= PIPE_BUFFER_USAGE_CPU_WRITE;
@@ -231,8 +232,12 @@ st_bufferobj_map_range(GLcontext *ctx, GLenum target,
if (access & MESA_MAP_NOWAIT_BIT)
flags |= PIPE_BUFFER_USAGE_DONTBLOCK;
obj->Pointer = pipe_buffer_map(pipe->screen, st_obj->buffer, flags);
return obj->Pointer;
map = pipe_buffer_map_range(pipe->screen, st_obj->buffer, offset, length, flags);
/* FIXME: some code expects this to point to the buffer start, which means that
* the range might not be respected in all circumstances
*/
obj->Pointer = map ? map - offset : NULL;
return map;
}