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Fix mametesters bug darius2_0114gre - missing sprites in Darius 2

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This commit is contained in:
Bryan McPhail 2008-01-06 19:40:03 +00:00
parent 7ce3ee6529
commit 8a61784229
1 changed files with 17 additions and 8 deletions
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25
src/mame/video/ninjaw.c
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@ -58,7 +58,7 @@ VIDEO_START( ninjaw )
static void draw_sprites(running_machine *machine, mame_bitmap *bitmap,const rectangle *cliprect,int primask,int x_offs,int y_offs)
{
int offs, data, tilenum, color, flipx, flipy;
int x, y, priority, invis, curx, cury;
int x, y, priority, curx, cury;
int code;
#ifdef MAME_DEBUG
@ -77,24 +77,33 @@ static void draw_sprites(running_machine *machine, mame_bitmap *bitmap,const rec
if (!tilenum) continue;
data = spriteram16[offs+0];
// x = (data - 8) & 0x3ff;
x = (data - 32) & 0x3ff; /* aligns sprites on rock outcrops and sewer hole */
data = spriteram16[offs+1];
y = (data - 0) & 0x1ff;
/* don't know meaning of "invis" bit (Darius: explosions of your bomb shots) */
/*
The purpose of the bit at data&0x8 (below) is unknown, but it is set
on Darius explosions, some enemy missiles and at least 1 boss.
It is most likely another priority bit but as there are no obvious
visual problems it will need checked against the original pcb.
There is a report this bit is set when the player intersects
the tank sprite in Ninja Warriors however I was unable to repro
this or find any use of this bit in that game.
Bit&0x8000 is set on some sprites in later levels of Darius
but is again unknown, and there is no obvious visual problem.
*/
data = spriteram16[offs+3];
flipx = (data & 0x1);
flipy = (data & 0x2) >> 1;
priority = (data & 0x4) >> 2; // 1 = low
/* data&0x8 - unknown */
if (priority != primask) continue;
invis = (data & 0x8) >> 3;
color = (data & 0x7f00) >> 8;
/* Ninjaw: this stops your player flickering black and cutting into tank sprites */
if (invis) continue;
/* data&0x8000 - unknown */
#ifdef MAME_DEBUG
if (data & 0x80f0) unknown |= (data &0x80f0);
#endif