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ATI Mach8/32 fixes regarding 1992 ATI Ultra drivers for Windows 3.1x:

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1. For some reason, background colors were always black under those drivers in 8bpp mode, added a tweak to fix it (as well as Clock colors).
2. Likewise for the red scrolling in pbrush or write, added a tweak to its bitblt read mask.
3. Don't call svga_recalctimings in the hdisp/vdisp ports directly, fixes screen size on said drivers without affecting other stuff.
This commit is contained in:
TC1995
2023-12-22 19:43:51 +01:00
parent 8d0d58c27e
commit 524fd30c0c
2 changed files with 12 additions and 6 deletions
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8
src/video/vid_8514a.c
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@@ -2940,9 +2940,11 @@ rect_fill:
} else {
while (count-- && dev->accel.sy >= 0) {
if (dev->accel.cx >= dev->accel.clip_left && dev->accel.cx <= clip_r && dev->accel.cy >= dev->accel.clip_top && dev->accel.cy <= clip_b) {
switch ((mix_dat & mix_mask) ? frgd_mix : bkgd_mix) {
switch (frgd_mix) {
case 0:
src_dat = bkgd_color;
if (!bkgd_mix && (dev->accel.cmd & 0x40) && ((dev->accel.frgd_mix & 0x1f) == 7) && ((dev->accel.bkgd_mix & 0x1f) == 3) && !dev->bpp && (bkgd_color == 0x00)) /*For some reason, the September 1992 Mach8/32 drivers for Win3.x don't set the background colors properly.*/
src_dat = frgd_color;
break;
case 1:
src_dat = frgd_color;
@@ -2962,7 +2964,7 @@ rect_fill:
if ((compare_mode == 0) || ((compare_mode == 0x10) && (dest_dat >= compare)) || ((compare_mode == 0x18) && (dest_dat < compare)) || ((compare_mode == 0x20) && (dest_dat != compare)) || ((compare_mode == 0x28) && (dest_dat == compare)) || ((compare_mode == 0x30) && (dest_dat <= compare)) || ((compare_mode == 0x38) && (dest_dat > compare))) {
old_dest_dat = dest_dat;
MIX(mix_dat & mix_mask, dest_dat, src_dat);
MIX(1, dest_dat, src_dat);
dest_dat = (dest_dat & wrt_mask) | (old_dest_dat & ~wrt_mask);
WRITE(dev->accel.dest + dev->accel.cx, dest_dat);
}
@@ -3740,7 +3742,7 @@ bitblt:
case 3:
READ(dev->accel.src + dev->accel.cx, src_dat);
if (pixcntl == 3) {
if (dev->accel.cmd & 0x10) {
if ((dev->accel.cmd & 0x10) && !(dev->accel.cmd & 0x40)) {
src_dat = ((src_dat & rd_mask) == rd_mask);
}
}