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implemented a multi-sprite bit in toaplan2 driver

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this diff fix partially bug #00944 (There are gfx glitches on the background in the ending scene)
This commit is contained in:
Roberto Zandona 2009-03-15 10:40:26 +00:00
parent f138b0635b
commit 5ebcb94f9e
1 changed files with 16 additions and 4 deletions
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16
src/mame/video/toaplan2.c
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@ -72,7 +72,7 @@ There seems to be sprite buffering - double buffering actually.
---- xxxx ---- ---- = Priority (0 - Fh)
---x ---- ---- ---- = Flip X
--x- ---- ---- ---- = Flip Y
-?-- ---- ---- ---- = unknown / unused
-x-- ---- ---- ---- = Multi-sprite
x--- ---- ---- ---- = Show sprite ?
1
@ -1315,13 +1315,16 @@ static void draw_sprites( running_machine *machine, bitmap_t *bitmap, const rect
{
const gfx_element *gfx = machine->gfx[ ((controller*2)+1) ];
int offs;
int offs, old_x, old_y;
UINT16 *source = (UINT16 *)(spriteram16_n[controller]);
priority_to_display <<= 8;
old_x = (-(sprite_scrollx[controller]+xoffset[3])) & 0x1ff;
old_y = (-(sprite_scrolly[controller]+yoffset[3])) & 0x1ff;
for (offs = 0; offs < (TOAPLAN2_SPRITERAM_SIZE/2); offs += 4)
{
int attrib, sprite, color, priority, flipx, flipy, sx, sy;
@ -1350,8 +1353,17 @@ static void draw_sprites( running_machine *machine, bitmap_t *bitmap, const rect
sprite_sizey = ((source[offs + 3] & 0x0f) + 1) * 8;
/***** find position to display sprite *****/
if (!(attrib & 0x4000))
{
sx_base = ((source[offs + 2] >> 7) - (sprite_scrollx[controller]+xoffset[3])) & 0x1ff;
sy_base = ((source[offs + 3] >> 7) - (sprite_scrolly[controller]+yoffset[3])) & 0x1ff;
} else {
sx_base = (old_x + (source[offs + 2] >> 7)) & 0x1ff;
sy_base = (old_y + (source[offs + 3] >> 7)) & 0x1ff;
}
old_x = sx_base;
old_y = sy_base;
flipx = attrib & TOAPLAN2_SPRITE_FLIPX;
flipy = attrib & TOAPLAN2_SPRITE_FLIPY;