diff options
| -rw-r--r-- | hw/display/cirrus_vga_rop.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/hw/display/cirrus_vga_rop.h b/hw/display/cirrus_vga_rop.h index 0925a009fe..b7447f8733 100644 --- a/hw/display/cirrus_vga_rop.h +++ b/hw/display/cirrus_vga_rop.h @@ -97,6 +97,11 @@ glue(glue(cirrus_bitblt_rop_fwd_transp_, ROP_NAME),_8)(CirrusVGAState *s, uint8_t p; dstpitch -= bltwidth; srcpitch -= bltwidth; + + if (bltheight > 1 && (dstpitch < 0 || srcpitch < 0)) { + return; + } + for (y = 0; y < bltheight; y++) { for (x = 0; x < bltwidth; x++) { p = *dst; @@ -143,6 +148,11 @@ glue(glue(cirrus_bitblt_rop_fwd_transp_, ROP_NAME),_16)(CirrusVGAState *s, uint8_t p1, p2; dstpitch -= bltwidth; srcpitch -= bltwidth; + + if (bltheight > 1 && (dstpitch < 0 || srcpitch < 0)) { + return; + } + for (y = 0; y < bltheight; y++) { for (x = 0; x < bltwidth; x+=2) { p1 = *dst; |