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Improved sprite zooming

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This commit is contained in:
Angelo Salese 2010-01-17 18:58:54 +00:00
parent 4230eb97cd
commit 6cc32bbc68
1 changed files with 31 additions and 10 deletions
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33
src/mame/drivers/cybertnk.c
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@ -256,7 +256,7 @@ static VIDEO_UPDATE( cybertnk )
{ {
const UINT8 *blit_ram = memory_region(screen->machine,"spr_gfx"); const UINT8 *blit_ram = memory_region(screen->machine,"spr_gfx");
int offs,x,y,z,xsize,ysize,yi,xi,col_bank,fx,zoom; int offs,x,y,z,xsize,ysize,yi,xi,col_bank,fx,zoom;
UINT32 spr_offs; UINT32 spr_offs,spr_offs_helper;
int xf,yf,xz,yz; int xf,yf,xz,yz;
for(offs=0;offs<0x1000/2;offs+=8) for(offs=0;offs<0x1000/2;offs+=8)
@ -281,12 +281,10 @@ static VIDEO_UPDATE( cybertnk )
xz = 0; xz = 0;
yz = 0; yz = 0;
if(zoom > 0x80)
continue;
for(yi = 0;yi < ysize;yi++) for(yi = 0;yi < ysize;yi++)
{ {
xf = xz = 0; xf = xz = 0;
spr_offs_helper = spr_offs;
for(xi=0;xi < xsize;xi+=8) for(xi=0;xi < xsize;xi+=8)
{ {
UINT32 color; UINT32 color;
@ -318,11 +316,19 @@ static VIDEO_UPDATE( cybertnk )
*BITMAP_ADDR16(bitmap, y+yz, x+xz) = screen->machine->pens[dot]; *BITMAP_ADDR16(bitmap, y+yz, x+xz) = screen->machine->pens[dot];
} }
} }
xf+=zoom;
if(xf >= 0x100)
{
xz++;
xf-=0x100;
}
else
{
shift_pen -= 8; shift_pen -= 8;
x_dec++; x_dec++;
xf+=zoom;
if(xf >= 0x80) { xz++; xf-=0x80; } if(xf >= 0x80) { xz++; xf-=0x80; }
} }
}
shift_pen = 24; shift_pen = 24;
x_dec = 4; x_dec = 4;
@ -344,15 +350,30 @@ static VIDEO_UPDATE( cybertnk )
*BITMAP_ADDR16(bitmap, y+yz, x+xz) = screen->machine->pens[dot]; *BITMAP_ADDR16(bitmap, y+yz, x+xz) = screen->machine->pens[dot];
} }
} }
xf+=zoom;
if(xf >= 0x100)
{
xz++;
xf-=0x100;
}
else
{
shift_pen -= 8; shift_pen -= 8;
x_dec++; x_dec++;
xf+=zoom;
if(xf >= 0x80) { xz++; xf-=0x80; } if(xf >= 0x80) { xz++; xf-=0x80; }
} }
}
spr_offs+=4; spr_offs+=4;
} }
yf+=zoom; yf+=zoom;
if(yf >= 0x100)
{
yi--;
yz++;
spr_offs = spr_offs_helper;
yf-=0x100;
}
if(yf >= 0x80) { yz++; yf-=0x80; } if(yf >= 0x80) { yz++; yf-=0x80; }
} }
} }