#include "emu.h"
#include "video/konicdev.h"
#include "includes/crimfght.h"
/***************************************************************************
Callbacks for the K052109
***************************************************************************/
void crimfght_tile_callback( running_machine &machine, int layer, int bank, int *code, int *color, int *flags, int *priority )
{
crimfght_state *state = machine.driver_data<crimfght_state>();
*flags = (*color & 0x20) ? TILE_FLIPX : 0;
*code |= ((*color & 0x1f) << 8) | (bank << 13);
*color = state->m_layer_colorbase[layer] + ((*color & 0xc0) >> 6);
}
/***************************************************************************
Callbacks for the K051960
***************************************************************************/
void crimfght_sprite_callback( running_machine &machine, int *code, int *color, int *priority, int *shadow )
{
/* Weird priority scheme. Why use three bits when two would suffice? */
/* The PROM allows for mixed priorities, where sprites would have */
/* priority over text but not on one or both of the other two planes. */
/* Luckily, this isn't used by the game. */
crimfght_state *state = machine.driver_data<crimfght_state>();
switch (*color & 0x70)
{
case 0x10: *priority = 0; break;
case 0x00: *priority = 1; break;
case 0x40: *priority = 2; break;
case 0x20: *priority = 3; break;
/* 0x60 == 0x20 */
/* 0x50 priority over F and A, but not over B */
/* 0x30 priority over F, but not over A and B */
/* 0x70 == 0x30 */
}
/* bit 7 is on in the "Game Over" sprites, meaning unknown */
/* in Aliens it is the top bit of the code, but that's not needed here */
*color = state->m_sprite_colorbase + (*color & 0x0f);
}
/***************************************************************************
Start the video hardware emulation.
***************************************************************************/
VIDEO_START( crimfght )
{
crimfght_state *state = machine.driver_data<crimfght_state>();
machine.generic.paletteram.u8 = auto_alloc_array(machine, UINT8, 0x400);
state->m_layer_colorbase[0] = 0;
state->m_layer_colorbase[1] = 4;
state->m_layer_colorbase[2] = 8;
state->m_sprite_colorbase = 16;
state_save_register_global_pointer(machine, machine.generic.paletteram.u8, 0x400);
}
/***************************************************************************
Display refresh
***************************************************************************/
SCREEN_UPDATE( crimfght )
{
crimfght_state *state = screen->machine().driver_data<crimfght_state>();
k052109_tilemap_update(state->m_k052109);
k052109_tilemap_draw(state->m_k052109, bitmap, cliprect, 1, TILEMAP_DRAW_OPAQUE, 0);
k051960_sprites_draw(state->m_k051960, bitmap, cliprect, 2, 2);
k052109_tilemap_draw(state->m_k052109, bitmap, cliprect, 2, 0, 0);
k051960_sprites_draw(state->m_k051960, bitmap, cliprect, 1, 1);
k052109_tilemap_draw(state->m_k052109, bitmap, cliprect, 0, 0, 0);
k051960_sprites_draw(state->m_k051960, bitmap, cliprect, 0, 0);
return 0;
}