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Cleaned up drawing routines

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This commit is contained in:
Angelo Salese 2010-12-06 13:18:10 +00:00
parent 355919fc57
commit 3219f252bd
1 changed files with 44 additions and 64 deletions
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108
src/mame/drivers/neoprint.c
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@ -33,74 +33,54 @@ VIDEO_START(neoprint)
}
/*
video registers:
xxxx xxxx xxxx xxxx [0] scroll X, signed
xxxx xxxx xxxx xxxx [2] scroll Y, signed
---- ---x ---- ---- [6] enabled on layer 2 only, priority?
---- ---- -x-- ---- [6] layer enable?
---- ---- --?? ??xx [6] map register
*/
static void draw_layer(running_machine *machine, bitmap_t *bitmap,const rectangle *cliprect,int layer)
{
int i, y, x;
const gfx_element *gfx = machine->gfx[0];
INT16 scrollx, scrolly;
i = (npvidregs[((layer*8)+0x06)/2] & 3) * 0x1000/4;
scrollx = ((npvidregs[((layer*8)+0x00)/2] - 0xd8) & 0x03ff);
scrolly = ((npvidregs[((layer*8)+0x02)/2] - 0xffeb) & 0x03ff);
scrollx/=2;
scrolly/=2;
for (y=0;y<32;y++)
{
for (x=0;x<32;x++)
{
UINT16 dat = npvidram[i*2]>>2;
UINT16 color = ((npvidram[i*2+1] & 0xff00) >> 8)*4;
UINT8 fx = (npvidram[i*2+1] & 0x0040);
UINT8 fy = (npvidram[i*2+1] & 0x0080);
drawgfx_transpen(bitmap,cliprect,gfx,dat,color,fx,fy,x*16+scrollx,y*16-scrolly,0);
drawgfx_transpen(bitmap,cliprect,gfx,dat,color,fx,fy,x*16+scrollx-512,y*16-scrolly,0);
drawgfx_transpen(bitmap,cliprect,gfx,dat,color,fx,fy,x*16+scrollx,y*16-scrolly-512,0);
drawgfx_transpen(bitmap,cliprect,gfx,dat,color,fx,fy,x*16+scrollx-512,y*16-scrolly-512,0);
i++;
//i&=0x3ff;
}
}
}
VIDEO_UPDATE(neoprint)
{
bitmap_fill(bitmap, cliprect, 0);
/* layer 1 */
{
int i, y, x;
const gfx_element *gfx = screen->machine->gfx[0];
INT16 scrollx, scrolly;
i = (npvidregs[0x0e/2] & 3) * 0x400; //0x16 is identical?
scrollx = ((npvidregs[0x08/2] - 0xd8) & 0x03ff);
scrolly = ((npvidregs[0x0a/2] - 0xffeb) & 0x03ff);
scrollx/=2;
scrolly/=2;
for (y=0;y<32;y++)
{
for (x=0;x<32;x++)
{
UINT16 dat = npvidram[i*2]>>2;
UINT16 color = ((npvidram[i*2+1] & 0xff00) >> 8)*4;
UINT8 fx = (npvidram[i*2+1] & 0x0040);
UINT8 fy = (npvidram[i*2+1] & 0x0080);
drawgfx_transpen(bitmap,cliprect,gfx,dat,color,fx,fy,x*16+scrollx,y*16-scrolly,0);
drawgfx_transpen(bitmap,cliprect,gfx,dat,color,fx,fy,x*16+scrollx-512,y*16-scrolly,0);
drawgfx_transpen(bitmap,cliprect,gfx,dat,color,fx,fy,x*16+scrollx,y*16-scrolly-512,0);
drawgfx_transpen(bitmap,cliprect,gfx,dat,color,fx,fy,x*16+scrollx-512,y*16-scrolly-512,0);
i++;
}
}
}
/* layer 0 */
{
int i, y, x;
const gfx_element *gfx = screen->machine->gfx[0];
INT16 scrollx, scrolly;
i = (npvidregs[0x06/2] & 3) * 0x400;
scrollx = ((npvidregs[0x00/2] - 0xd8) & 0x03ff);
scrolly = ((npvidregs[0x02/2] - 0xffeb) & 0x03ff);
scrollx/=2;
scrolly/=2;
for (y=0;y<32;y++)
{
for (x=0;x<32;x++)
{
UINT16 dat = npvidram[i*2]>>2;
UINT16 color = ((npvidram[i*2+1] & 0xff00) >> 8)*4;
UINT8 fx = (npvidram[i*2+1] & 0x0040);
UINT8 fy = (npvidram[i*2+1] & 0x0080);
drawgfx_transpen(bitmap,cliprect,gfx,dat,color,fx,fy,x*16+scrollx,y*16-scrolly,0);
drawgfx_transpen(bitmap,cliprect,gfx,dat,color,fx,fy,x*16+scrollx-512,y*16-scrolly,0);
drawgfx_transpen(bitmap,cliprect,gfx,dat,color,fx,fy,x*16+scrollx,y*16-scrolly-512,0);
drawgfx_transpen(bitmap,cliprect,gfx,dat,color,fx,fy,x*16+scrollx-512,y*16-scrolly-512,0);
i++;
//i&=0x3ff;
}
}
}
draw_layer(screen->machine,bitmap,cliprect,1);
draw_layer(screen->machine,bitmap,cliprect,0);
return 0;
}