Commit 1cb62e36 authored by BALATON Zoltan's avatar BALATON Zoltan Committed by Gerd Hoffmann
Browse files

sm501: Ignore no-op blits 



Some guests seem to try source copy blits with same source and dest
which are no-op so avoid calling pixman for these.

Signed-off-by: default avatarBALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: default avatarPeter Maydell <peter.maydell@linaro.org>
Message-id: a2a8214dd37344dfb65f1c343ace4cff2e94f3bb.1592686588.git.balaton@eik.bme.hu
Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
parent 4decaad9

hw/display/sm501.c

+5 −0
Original line number Diff line number Diff line
@@ -788,6 +788,11 @@ static void sm501_2d_operation(SM501State *s) 
                              (rop2_source_is_pattern ?

                                  " with pattern source" : ""));

            }

            /* Ignore no-op blits, some guests seem to do this */

            if (src_base == dst_base && src_pitch == dst_pitch &&

                src_x == dst_x && src_y == dst_y) {

                break;

            }

            /* Check for overlaps, this could be made more exact */

            uint32_t sb, se, db, de;

            sb = src_base + src_x + src_y * (width + src_pitch);