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Implemented flip x and negative y offsets

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This commit is contained in:
Angelo Salese 2010-01-16 19:04:56 +00:00
parent 6ec1f9c3a4
commit b21cdf8e5a
1 changed files with 26 additions and 7 deletions
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25
src/mame/drivers/cybertnk.c
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@ -257,19 +257,22 @@ static VIDEO_UPDATE( cybertnk )
if(1)
{
const UINT8 *blit_ram = memory_region(screen->machine,"spr_gfx");
int offs,x,y,z,xsize,ysize,yi,xi,col_bank;
int offs,x,y,z,xsize,ysize,yi,xi,col_bank,fx;
UINT32 spr_offs;
for(offs=0;offs<0x1000/2;offs+=8)
{
z = (spr_ram[offs+(0x6/2)] & 0xffff);
if(z == 0xffff)
if(z == 0xffff || spr_ram[offs+(0x0/2)] == 0x0000) //TODO: check the correct bit
continue;
x = (spr_ram[offs+(0xa/2)] & 0x1ff);
y = (spr_ram[offs+(0x4/2)] & 0xff);
if(spr_ram[offs+(0x4/2)] & 0x100)
y = 0x100 - y;
spr_offs = (((spr_ram[offs+(0x0/2)] & 7) << 16) | (spr_ram[offs+(0x2/2)])) << 2;
xsize = ((spr_ram[offs+(0xc/2)] & 0x000f)+1) << 3; //obviously wrong!
ysize = (spr_ram[offs+(0x8/2)] & 0x00ff)+1;
fx = (spr_ram[offs+(0xa/2)] & 0x8000) >> 15;
col_bank = (spr_ram[offs+(0x0/2)] & 0xff00) >> 8;
@ -296,9 +299,17 @@ static VIDEO_UPDATE( cybertnk )
if(dot != 0) // transparent pen
{
dot|= col_bank<<4;
if(fx)
{
if(((x+xsize-(x_dec+xi)) < video_screen_get_visible_area(screen)->max_x) && ((y+yi) < video_screen_get_visible_area(screen)->max_y))
*BITMAP_ADDR16(bitmap, y+yi, x+xsize-(x_dec+xi)) = screen->machine->pens[dot];
}
else
{
if(((x+x_dec+xi) < video_screen_get_visible_area(screen)->max_x) && ((y+yi) < video_screen_get_visible_area(screen)->max_y))
*BITMAP_ADDR16(bitmap, y+yi, x+x_dec+xi) = screen->machine->pens[dot];
}
}
shift_pen -= 8;
x_dec++;
}
@ -312,9 +323,17 @@ static VIDEO_UPDATE( cybertnk )
if(dot != 0) // transparent pen
{
dot|= col_bank<<4;
if(fx)
{
if(((x+xsize-(x_dec+xi)) < video_screen_get_visible_area(screen)->max_x) && ((y+yi) < video_screen_get_visible_area(screen)->max_y))
*BITMAP_ADDR16(bitmap, y+yi, x+xsize-(x_dec+xi)) = screen->machine->pens[dot];
}
else
{
if(((x+x_dec+xi) < video_screen_get_visible_area(screen)->max_x) && ((y+yi) < video_screen_get_visible_area(screen)->max_y))
*BITMAP_ADDR16(bitmap, y+yi, x+x_dec+xi) = screen->machine->pens[dot];
}
}
shift_pen -= 8;
x_dec++;
}
@ -886,4 +905,4 @@ ROM_START( cybertnk )
ROM_LOAD( "ic30", 0x0260, 0x0020, CRC(2bb6033f) SHA1(eb994108734d7d04f8e293eca21bb3051a63cfe9) )
ROM_END
GAME( 1988, cybertnk, 0, cybertnk, cybertnk, cybertnk, ROT0, "Coreland", "Cyber Tank (v1.04)", GAME_NO_SOUND|GAME_NOT_WORKING )
GAME( 1988, cybertnk, 0, cybertnk, cybertnk, cybertnk, ROT0, "Coreland", "Cyber Tank (v1.04)", GAME_NOT_WORKING )