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System 24 Linescroll update [Olivier Galibert]

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Thanks to Haze finding it was used in qrouka, here is the final
system24 linescroll mode.

Guru, it would be nice if you could check if the effect on the title
screen is correct (the wobbling when the name goes back up).  It looks
correct though.

  OG.
This commit is contained in:
davidhay 2009-03-01 20:45:21 +00:00
parent 667a7e19f5
commit 14efd9bf62
1 changed files with 24 additions and 1 deletions
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25
src/mame/video/segaic24.c
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@ -443,7 +443,30 @@ void sys24_tile_draw(running_machine *machine, bitmap_t *bitmap, const rectangle
switch((ctrl & 0x6000) >> 13) {
case 1: {
popmessage("Linescroll subtype 1");
int y;
UINT16 vv;
vv = (-vscr) & 0x1ff;
if(!((-vscr) & 0x200))
layer ^= 1;
for(y=0; y<384; y++) {
if(y >= cliprect->min_y && y <= cliprect->max_y) {
UINT16 h;
rectangle c = *cliprect;
int l1 = layer;
if(y >= vv)
l1 ^= 1;
c.min_y = c.max_y = y;
// Whether it's tilemap-relative or screen-relative is unknown
hscr = hscrtb[v];
h = hscr & 0x1ff;
tilemap_set_scrollx(sys24_tile_layer[l1], 0, -h);
tilemap_draw(bitmap, &c, sys24_tile_layer[l1], tpri, lpri);
}
v = (v + 1) & 0x1ff;
}
break;
}
case 2: case 3: {