gallium: add API for setting window rectangles

Window rectangles apply to all framebuffer operations, either in
inclusive or exclusive mode. They may also be specified as part of a
blit operation.

In exclusive mode, any fragment inside any of the specified rectangles
will be discarded.

In inclusive mode, any fragment outside every rectangle will be
discarded.

The no-op state is to have 0 rectangles in exclusive mode.

Signed-off-by: Ilia Mirkin <[email protected]>
Reviewed-by: Brian Paul <[email protected]>
Reviewed-by: Nicolai Hähnle <[email protected]>

0 files changed, 0 insertions, 0 deletions