/***************************************************************************
Mustache Boy
(c)1987 March Electronics
***************************************************************************/
#include "emu.h"
#include "includes/mustache.h"
PALETTE_INIT(mustache)
{
int i;
for (i = 0;i < 256;i++)
{
int bit0,bit1,bit2,bit3,r,g,b;
/* red component */
bit0 = (color_prom[i] >> 0) & 0x01;
bit1 = (color_prom[i] >> 1) & 0x01;
bit2 = (color_prom[i] >> 2) & 0x01;
bit3 = (color_prom[i] >> 3) & 0x01;
r = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;
/* green component */
bit0 = (color_prom[i + 256] >> 0) & 0x01;
bit1 = (color_prom[i + 256] >> 1) & 0x01;
bit2 = (color_prom[i + 256] >> 2) & 0x01;
bit3 = (color_prom[i + 256] >> 3) & 0x01;
g = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;
/* blue component */
bit0 = (color_prom[i + 512] >> 0) & 0x01;
bit1 = (color_prom[i + 512] >> 1) & 0x01;
bit2 = (color_prom[i + 512] >> 2) & 0x01;
bit3 = (color_prom[i + 512] >> 3) & 0x01;
b = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;
palette_set_color(machine,i,MAKE_RGB(r,g,b));
}
}
WRITE8_HANDLER( mustache_videoram_w )
{
mustache_state *state = space->machine().driver_data<mustache_state>();
UINT8 *videoram = state->m_videoram;
videoram[offset] = data;
tilemap_mark_tile_dirty(state->m_bg_tilemap, offset / 2);
}
WRITE8_HANDLER (mustache_video_control_w)
{
mustache_state *state = space->machine().driver_data<mustache_state>();
if (flip_screen_get(space->machine()) != (data & 0x01))
{
flip_screen_set(space->machine(), data & 0x01);
tilemap_mark_all_tiles_dirty_all(space->machine());
}
/* tile bank */
if ((state->m_control_byte ^ data) & 0x08)
{
state->m_control_byte = data;
tilemap_mark_all_tiles_dirty_all(space->machine());
}
}
WRITE8_HANDLER( mustache_scroll_w )
{
mustache_state *state = space->machine().driver_data<mustache_state>();
tilemap_set_scrollx(state->m_bg_tilemap, 0, 0x100 - data);
tilemap_set_scrollx(state->m_bg_tilemap, 1, 0x100 - data);
tilemap_set_scrollx(state->m_bg_tilemap, 2, 0x100 - data);
tilemap_set_scrollx(state->m_bg_tilemap, 3, 0x100);
}
static TILE_GET_INFO( get_bg_tile_info )
{
mustache_state *state = machine.driver_data<mustache_state>();
UINT8 *videoram = state->m_videoram;
int attr = videoram[2 * tile_index + 1];
int code = videoram[2 * tile_index] + ((attr & 0x60) << 3) + ((state->m_control_byte & 0x08) << 7);
int color = attr & 0x0f;
SET_TILE_INFO(0, code, color, ((attr & 0x10) ? TILE_FLIPX : 0) | ((attr & 0x80) ? TILE_FLIPY : 0) );
}
VIDEO_START( mustache )
{
mustache_state *state = machine.driver_data<mustache_state>();
state->m_bg_tilemap = tilemap_create(machine, get_bg_tile_info, tilemap_scan_rows_flip_x,
8, 8, 64, 32);
tilemap_set_scroll_rows(state->m_bg_tilemap, 4);
}
static void draw_sprites(running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect )
{
mustache_state *state = machine.driver_data<mustache_state>();
rectangle clip = *cliprect;
const gfx_element *gfx = machine.gfx[1];
const rectangle &visarea = machine.primary_screen->visible_area();
UINT8 *spriteram = state->m_spriteram;
int offs;
for (offs = 0;offs < state->m_spriteram_size;offs += 4)
{
int sy = 240-spriteram[offs];
int sx = 240-spriteram[offs+3];
int code = spriteram[offs+2];
int attr = spriteram[offs+1];
int color = (attr & 0xe0)>>5;
if (sy == 240) continue;
code+=(attr&0x0c)<<6;
if ((state->m_control_byte & 0xa))
clip.max_y = visarea.max_y;
else
if (flip_screen_get(machine))
clip.min_y = visarea.min_y + 56;
else
clip.max_y = visarea.max_y - 56;
if (flip_screen_get(machine))
{
sx = 240 - sx;
sy = 240 - sy;
}
drawgfx_transpen(bitmap,&clip,gfx,
code,
color,
flip_screen_get(machine),flip_screen_get(machine),
sx,sy,0);
}
}
SCREEN_UPDATE( mustache )
{
mustache_state *state = screen->machine().driver_data<mustache_state>();
tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0);
draw_sprites(screen->machine(), bitmap, cliprect);
return 0;
}