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Add sanity check to Voodoo 3/Banshee hardware cursor drawing

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Fixes #4351.
This commit is contained in:
Miran Grča
2024-04-16 19:18:50 +02:00
committed by GitHub
parent c930c13fa5
commit 22441a2302
1 changed files with 6 additions and 4 deletions
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2
src/video/vid_voodoo_banshee.c
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@@ -2109,10 +2109,12 @@ banshee_hwcursor_draw(svga_t *svga, int displine)
for (x = 0; x < 64; x += 8) { for (x = 0; x < 64; x += 8) {
if (x_off > -8) { if (x_off > -8) {
for (xx = 0; xx < 8; xx++) { for (xx = 0; xx < 8; xx++) {
if (((x_off + xx + svga->x_add) >= 0) && ((x_off + xx + svga->x_add) <= 2047)) {
if (!(plane0[x >> 3] & (1 << 7))) if (!(plane0[x >> 3] & (1 << 7)))
(svga->monitor->target_buffer->line[displine])[x_off + xx + svga->x_add] = (plane1[x >> 3] & (1 << 7)) ? col1 : col0; (svga->monitor->target_buffer->line[displine])[x_off + xx + svga->x_add] = (plane1[x >> 3] & (1 << 7)) ? col1 : col0;
else if (plane1[x >> 3] & (1 << 7)) else if (plane1[x >> 3] & (1 << 7))
(svga->monitor->target_buffer->line[displine])[x_off + xx + svga->x_add] ^= 0xffffff; (svga->monitor->target_buffer->line[displine])[x_off + xx + svga->x_add] ^= 0xffffff;
}
plane0[x >> 3] <<= 1; plane0[x >> 3] <<= 1;
plane1[x >> 3] <<= 1; plane1[x >> 3] <<= 1;