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/***************************************************************************
video.c
Functions to emulate the video hardware of the machine.
***************************************************************************/
#include "driver.h"
static tilemap *bg_tilemap;
PALETTE_INIT( ponttehk )
{
int i;
for ( i = 0; i < machine->drv->total_colors; i++ )
{
int bit0,bit1,bit2,bit3,r,g,b;
/* red component */
bit0 = (color_prom[0] >> 0) & 0x01;
bit1 = (color_prom[0] >> 1) & 0x01;
bit2 = (color_prom[0] >> 2) & 0x01;
bit3 = (color_prom[0] >> 3) & 0x01;
r = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;
/* green component */
bit0 = (color_prom[machine->drv->total_colors] >> 0) & 0x01;
bit1 = (color_prom[machine->drv->total_colors] >> 1) & 0x01;
bit2 = (color_prom[machine->drv->total_colors] >> 2) & 0x01;
bit3 = (color_prom[machine->drv->total_colors] >> 3) & 0x01;
g = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;
/* blue component */
bit0 = (color_prom[2*machine->drv->total_colors] >> 0) & 0x01;
bit1 = (color_prom[2*machine->drv->total_colors] >> 1) & 0x01;
bit2 = (color_prom[2*machine->drv->total_colors] >> 2) & 0x01;
bit3 = (color_prom[2*machine->drv->total_colors] >> 3) & 0x01;
b = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;
palette_set_color(machine,i,MAKE_RGB(r,g,b));
color_prom++;
}
}
PALETTE_INIT( lvcards ) //Ever so slightly different, but different enough.
{
int i;
for ( i = 0; i < machine->drv->total_colors; i++ )
{
int bit0,bit1,bit2,bit3,r,g,b;
/* red component */
bit0 = (color_prom[0] >> 0) & 0x11;
bit1 = (color_prom[0] >> 1) & 0x11;
bit2 = (color_prom[0] >> 2) & 0x11;
bit3 = (color_prom[0] >> 3) & 0x11;
r = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;
/* green component */
bit0 = (color_prom[machine->drv->total_colors] >> 0) & 0x11;
bit1 = (color_prom[machine->drv->total_colors] >> 1) & 0x11;
bit2 = (color_prom[machine->drv->total_colors] >> 2) & 0x11;
bit3 = (color_prom[machine->drv->total_colors] >> 3) & 0x11;
g = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;
/* blue component */
bit0 = (color_prom[2*machine->drv->total_colors] >> 0) & 0x11;
bit1 = (color_prom[2*machine->drv->total_colors] >> 1) & 0x11;
bit2 = (color_prom[2*machine->drv->total_colors] >> 2) & 0x11;
bit3 = (color_prom[2*machine->drv->total_colors] >> 3) & 0x11;
b = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;
palette_set_color(machine,i,MAKE_RGB(r,g,b));
color_prom++;
}
}
WRITE8_HANDLER( lvcards_videoram_w )
{
videoram[offset] = data;
tilemap_mark_tile_dirty(bg_tilemap, offset);
}
WRITE8_HANDLER( lvcards_colorram_w )
{
colorram[offset] = data;
tilemap_mark_tile_dirty(bg_tilemap, offset);
}
static TILE_GET_INFO( get_bg_tile_info )
{
int attr = colorram[tile_index];
int code = videoram[tile_index] + ((attr & 0x30) << 4) + ((attr & 0x80) << 3);
int color = attr & 0x0f;
int flags = (attr & 0x40) ? TILE_FLIPX : 0;
SET_TILE_INFO(0, code, color, flags);
}
VIDEO_START( lvcards )
{
bg_tilemap = tilemap_create(get_bg_tile_info, tilemap_scan_rows,
TILEMAP_TYPE_PEN, 8, 8, 32, 32);
}
VIDEO_UPDATE( lvcards )
{
tilemap_draw(bitmap, cliprect, bg_tilemap, 0, 0);
return 0;
}
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