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radeon: Hack up an implementation of MapBufferRange

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This doesn't implement any of the "cool" features of MapBufferRange.
Adding this function is necessary for the next commit in the series.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Acked-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Alex Deucher <alexdeucher@gmail.com>
Cc: Maciej Cencora <m.cencora@gmail.com>
This commit is contained in:
Ian Romanick 2011-08-21 18:32:09 -07:00
parent b2184da684
commit cccc7412c2
1 changed files with 33 additions and 0 deletions
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33
src/mesa/drivers/dri/radeon/radeon_buffer_objects.c
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@ -197,6 +197,38 @@ radeonMapBuffer(struct gl_context * ctx,
}
/**
* Called via glMapBufferRange()
*/
static void *
radeonMapBufferRange(struct gl_context * ctx,
GLintptr offset, GLsizeiptr length,
GLbitfield access, struct gl_buffer_object *obj)
{
struct radeon_buffer_object *radeon_obj = get_radeon_buffer_object(obj);
const GLboolean write_only =
(access & (GL_MAP_READ_BIT | GL_MAP_WRITE_BIT)) == GL_MAP_WRITE_BIT;
if (write_only) {
ctx->Driver.Flush(ctx);
}
if (radeon_obj->bo == NULL) {
obj->Pointer = NULL;
return NULL;
}
obj->Offset = offset;
obj->Length = length;
obj->AccessFlags = access;
radeon_bo_map(radeon_obj->bo, write_only);
obj->Pointer = radeon_obj->bo->ptr + offset;
return obj->Pointer;
}
/**
* Called via glUnmapBufferARB()
*/
@ -226,5 +258,6 @@ radeonInitBufferObjectFuncs(struct dd_function_table *functions)
functions->BufferSubData = radeonBufferSubData;
functions->GetBufferSubData = radeonGetBufferSubData;
functions->MapBuffer = radeonMapBuffer;
functions->MapBufferRange = radeonMapBufferRange;
functions->UnmapBuffer = radeonUnmapBuffer;
}