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#include "emu.h"
#include "includes/pirates.h"
/* Video Hardware */
/* tilemaps */
static TILE_GET_INFO( get_tx_tile_info )
{
pirates_state *state = machine.driver_data<pirates_state>();
int code = state->m_tx_tileram[tile_index*2];
int colr = state->m_tx_tileram[tile_index*2+1];
SET_TILE_INFO(0,code,colr,0);
}
static TILE_GET_INFO( get_fg_tile_info )
{
pirates_state *state = machine.driver_data<pirates_state>();
int code = state->m_fg_tileram[tile_index*2];
int colr = state->m_fg_tileram[tile_index*2+1]+0x80;
SET_TILE_INFO(0,code,colr,0);
}
static TILE_GET_INFO( get_bg_tile_info )
{
pirates_state *state = machine.driver_data<pirates_state>();
int code = state->m_bg_tileram[tile_index*2];
int colr = state->m_bg_tileram[tile_index*2+1]+ 0x100;
SET_TILE_INFO(0,code,colr,0);
}
/* video start / update */
VIDEO_START(pirates)
{
pirates_state *state = machine.driver_data<pirates_state>();
state->m_tx_tilemap = tilemap_create(machine, get_tx_tile_info,tilemap_scan_cols,8,8,36,32);
/* Not sure how big they can be, Pirates uses only 32 columns, Genix 44 */
state->m_fg_tilemap = tilemap_create(machine, get_fg_tile_info,tilemap_scan_cols,8,8,64,32);
state->m_bg_tilemap = tilemap_create(machine, get_bg_tile_info,tilemap_scan_cols, 8,8,64,32);
tilemap_set_transparent_pen(state->m_tx_tilemap,0);
tilemap_set_transparent_pen(state->m_fg_tilemap,0);
}
WRITE16_HANDLER( pirates_tx_tileram_w )
{
pirates_state *state = space->machine().driver_data<pirates_state>();
COMBINE_DATA(state->m_tx_tileram+offset);
tilemap_mark_tile_dirty(state->m_tx_tilemap,offset/2);
}
WRITE16_HANDLER( pirates_fg_tileram_w )
{
pirates_state *state = space->machine().driver_data<pirates_state>();
COMBINE_DATA(state->m_fg_tileram+offset);
tilemap_mark_tile_dirty(state->m_fg_tilemap,offset/2);
}
WRITE16_HANDLER( pirates_bg_tileram_w )
{
pirates_state *state = space->machine().driver_data<pirates_state>();
COMBINE_DATA(state->m_bg_tileram+offset);
tilemap_mark_tile_dirty(state->m_bg_tilemap,offset/2);
}
static void draw_sprites(running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect)
{
pirates_state *state = machine.driver_data<pirates_state>();
const gfx_element *gfx = machine.gfx[1];
UINT16 *source = state->m_spriteram + 4;
UINT16 *finish = source + 0x800/2-4;
while( source<finish )
{
int xpos, ypos, flipx, flipy, code, color;
xpos = source[1] - 32;
ypos = source[-1]; // indeed...
if (ypos & 0x8000) break; /* end-of-list marker */
code = source[2] >> 2;
color = source[0] & 0xff;
flipx = source[2] & 2;
flipy = source[2] & 1;
ypos = 0xf2 - ypos;
drawgfx_transpen(bitmap,cliprect,gfx,
code,
color,
flipx,flipy,
xpos,ypos,0);
source+=4;
}
}
SCREEN_UPDATE(pirates)
{
pirates_state *state = screen->machine().driver_data<pirates_state>();
tilemap_set_scrollx(state->m_bg_tilemap,0,state->m_scroll[0]);
tilemap_set_scrollx(state->m_fg_tilemap,0,state->m_scroll[0]);
tilemap_draw(bitmap,cliprect,state->m_bg_tilemap,0,0);
tilemap_draw(bitmap,cliprect,state->m_fg_tilemap,0,0);
draw_sprites(screen->machine(),bitmap,cliprect);
tilemap_draw(bitmap,cliprect,state->m_tx_tilemap,0,0);
return 0;
}
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