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stvvdp2.cpp: don't repeat ROZ when screen over process is equal to 1, fixes D-Xhird practice stage [Angelo Salese]

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angelosa 2018-05-01 23:46:52 +02:00
parent e62744eda5
commit c9ee85b8b2
1 changed files with 5 additions and 2 deletions
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7
src/devices/video/stvvdp2.cpp
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@ -4667,8 +4667,11 @@ void saturn_state::stv_vdp2_copy_roz_bitmap(bitmap_rgb32 &bitmap,
clipxmask = clipymask = 0;
break;
case 1:
/* screen over pattern, not supported */
clipxmask = clipymask = 0;
/* screen over pattern */
// TODO: not supported, cfr. STV_VDP2_OVPNRA / STV_VDP2_OVPNRB
// D-Xhird uses this on practice stage
clipxmask = ~planesizex;
clipymask = ~planesizey;
break;
case 2:
/* outside display area, scroll screen is transparent */