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r7288 Sunday 7th February, 2010 at 23:32:01 UTC by Angelo Salese
[Super A'Can]: Improved tilemap paging and wrap-around

[src/mess/drivers]

supracan.c

src/mess/drivers/supracan.c

r7287	r7288
139	139	UINT16 tile_bank,pal_bank;
140	140
141	141	count = (state->tilemap_base_addr[layer]);
142		/* FIXME: I guess that this truly controls tilemap paging. */
143		if((state->tilemap_flags[layer] & 0x0f00) == 0xa00)
	142
	143	switch(state->tilemap_flags[layer] & 0x0f00)
144	144	{
145		xsize = 128;
146		ysize = 32;
	145	case 0x600: xsize = 64; ysize = 32; break;
	146	case 0xa00:   xsize = 128; ysize = 32; break;
	147	case 0xc00: xsize = 64; ysize = 64; break;
	148	default: xsize = 32; ysize = 32; break;
147	149	}
148		else
149		xsize = ysize = (state->video_flags & 0x100) ? 64 : 32;
150	150
151	151	scrollx = (state->tilemap_scrollx[layer] & 0x800) ? ((state->tilemap_scrollx[layer] & (xsize*8-1)) - xsize*8) : (state->tilemap_scrollx[layer] & (xsize*8-1));
152	152	scrolly = (state->tilemap_scrolly[layer] & 0x800) ? ((state->tilemap_scrolly[layer] & (ysize*8-1)) - ysize*8) : (state->tilemap_scrolly[layer] & (ysize*8-1));
r7287	r7288
155	155
156	156	switch(gfx_mode)
157	157	{
158		case 7:  region = 2; tile_bank = 0x1c00; pal_bank = 0x38; break;
	158	case 7:  region = 2; tile_bank = 0x1c00; pal_bank = 0x00; break;
159	159	case 4:  region = 0; tile_bank = 0x400;  pal_bank = 0x00; break;
160	160	case 2:  region = 1; tile_bank = 0x400;  pal_bank = 0x00; break;
161	161	case 0:  region = 1; tile_bank = 0;      pal_bank = 0x00; break;
r7287	r7288
182	182	drawgfx_transpen(bitmap,cliprect,machine->gfx[region],tile,pal,flipx,flipy,(x*8)-scrollx-xsize*8,(y*8)-scrolly,0);
183	183	drawgfx_transpen(bitmap,cliprect,machine->gfx[region],tile,pal,flipx,flipy,(x*8)-scrollx,(y*8)-scrolly-ysize*8,0);
184	184	drawgfx_transpen(bitmap,cliprect,machine->gfx[region],tile,pal,flipx,flipy,(x*8)-scrollx-xsize*8,(y*8)-scrolly-ysize*8,0);
	185	drawgfx_transpen(bitmap,cliprect,machine->gfx[region],tile,pal,flipx,flipy,(x*8)-scrollx+xsize*8,(y*8)-scrolly-ysize*8,0);
	186	drawgfx_transpen(bitmap,cliprect,machine->gfx[region],tile,pal,flipx,flipy,(x*8)-scrollx-xsize*8,(y*8)-scrolly+ysize*8,0);
185	187	}
186	188	count++;
187	189	}

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