/***************************************************************************
Video Hardware description for Taito Gladiator
***************************************************************************/
#include "emu.h"
#include "includes/gladiatr.h"
/***************************************************************************
Callbacks for the TileMap code
***************************************************************************/
static TILE_GET_INFO( bg_get_tile_info )
{
gladiatr_state *state = machine.driver_data<gladiatr_state>();
UINT8 attr = state->m_colorram[tile_index];
SET_TILE_INFO(
1,
state->m_videoram[tile_index] + ((attr & 0x07) << 8) + (state->m_bg_tile_bank << 11),
(attr >> 3) ^ 0x1f,
0);
}
static TILE_GET_INFO( fg_get_tile_info )
{
gladiatr_state *state = machine.driver_data<gladiatr_state>();
SET_TILE_INFO(
0,
state->m_textram[tile_index] + (state->m_fg_tile_bank << 8),
0,
0);
}
/***************************************************************************
Start the video hardware emulation.
***************************************************************************/
VIDEO_START( ppking )
{
gladiatr_state *state = machine.driver_data<gladiatr_state>();
state->m_bg_tilemap = tilemap_create(machine, bg_get_tile_info,tilemap_scan_rows,8,8,32,64);
state->m_fg_tilemap = tilemap_create(machine, fg_get_tile_info,tilemap_scan_rows,8,8,32,64);
tilemap_set_transparent_pen(state->m_fg_tilemap,0);
tilemap_set_scroll_cols(state->m_bg_tilemap, 0x10);
state->m_sprite_bank = 1;
}
VIDEO_START( gladiatr )
{
gladiatr_state *state = machine.driver_data<gladiatr_state>();
state->m_bg_tilemap = tilemap_create(machine, bg_get_tile_info,tilemap_scan_rows,8,8,64,32);
state->m_fg_tilemap = tilemap_create(machine, fg_get_tile_info,tilemap_scan_rows,8,8,64,32);
tilemap_set_transparent_pen(state->m_fg_tilemap,0);
tilemap_set_scrolldx(state->m_bg_tilemap, -0x30, 0x12f);
tilemap_set_scrolldx(state->m_fg_tilemap, -0x30, 0x12f);
state->m_sprite_bank = 2;
}
/***************************************************************************
Memory handlers
***************************************************************************/
WRITE8_HANDLER( gladiatr_videoram_w )
{
gladiatr_state *state = space->machine().driver_data<gladiatr_state>();
state->m_videoram[offset] = data;
tilemap_mark_tile_dirty(state->m_bg_tilemap,offset);
}
WRITE8_HANDLER( gladiatr_colorram_w )
{
gladiatr_state *state = space->machine().driver_data<gladiatr_state>();
state->m_colorram[offset] = data;
tilemap_mark_tile_dirty(state->m_bg_tilemap,offset);
}
WRITE8_HANDLER( gladiatr_textram_w )
{
gladiatr_state *state = space->machine().driver_data<gladiatr_state>();
state->m_textram[offset] = data;
tilemap_mark_tile_dirty(state->m_fg_tilemap,offset);
}
WRITE8_HANDLER( gladiatr_paletteram_w )
{
int r,g,b;
space->machine().generic.paletteram.u8[offset] = data;
offset &= 0x3ff;
r = (space->machine().generic.paletteram.u8[offset] >> 0) & 0x0f;
g = (space->machine().generic.paletteram.u8[offset] >> 4) & 0x0f;
b = (space->machine().generic.paletteram.u8[offset + 0x400] >> 0) & 0x0f;
r = (r << 1) + ((space->machine().generic.paletteram.u8[offset + 0x400] >> 4) & 0x01);
g = (g << 1) + ((space->machine().generic.paletteram.u8[offset + 0x400] >> 5) & 0x01);
b = (b << 1) + ((space->machine().generic.paletteram.u8[offset + 0x400] >> 6) & 0x01);
palette_set_color_rgb(space->machine(),offset,pal5bit(r),pal5bit(g),pal5bit(b));
}
WRITE8_HANDLER( gladiatr_spritebuffer_w )
{
gladiatr_state *state = space->machine().driver_data<gladiatr_state>();
state->m_sprite_buffer = data & 1;
}
WRITE8_HANDLER( gladiatr_spritebank_w )
{
gladiatr_state *state = space->machine().driver_data<gladiatr_state>();
state->m_sprite_bank = (data & 1) ? 4 : 2;
}
WRITE8_HANDLER( ppking_video_registers_w )
{
gladiatr_state *state = space->machine().driver_data<gladiatr_state>();
switch (offset & 0x300)
{
case 0x000:
tilemap_set_scrolly(state->m_bg_tilemap, offset & 0x0f, 0x100-data);
break;
case 0x200:
if (data & 0x80)
state->m_fg_scrolly = data + 0x100;
else
state->m_fg_scrolly = data;
break;
case 0x300:
if (state->m_fg_tile_bank != (data & 0x03))
{
state->m_fg_tile_bank = data & 0x03;
tilemap_mark_all_tiles_dirty(state->m_fg_tilemap);
}
state->m_video_attributes = data;
break;
}
//popmessage("%02x %02x",state->m_fg_scrolly, state->m_video_attributes);
}
WRITE8_HANDLER( gladiatr_video_registers_w )
{
gladiatr_state *state = space->machine().driver_data<gladiatr_state>();
switch (offset)
{
case 0x000:
state->m_fg_scrolly = data;
break;
case 0x080:
if (state->m_fg_tile_bank != (data & 0x03))
{
state->m_fg_tile_bank = data & 0x03;
tilemap_mark_all_tiles_dirty(state->m_fg_tilemap);
}
if (state->m_bg_tile_bank != ((data & 0x10) >> 4))
{
state->m_bg_tile_bank = (data & 0x10) >> 4;
tilemap_mark_all_tiles_dirty(state->m_bg_tilemap);
}
state->m_video_attributes = data;
break;
case 0x100:
state->m_fg_scrollx = data;
break;
case 0x200:
state->m_bg_scrolly = data;
break;
case 0x300:
state->m_bg_scrollx = data;
break;
}
}
/***************************************************************************
Display refresh
***************************************************************************/
static void draw_sprites(running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect)
{
gladiatr_state *state = machine.driver_data<gladiatr_state>();
int offs;
for (offs = 0;offs < 0x80;offs += 2)
{
static const int tile_offset[2][2] =
{
{0x0,0x1},
{0x2,0x3},
};
UINT8 *src = &state->m_spriteram[offs + (state->m_sprite_buffer << 7)];
int attributes = src[0x800];
int size = (attributes & 0x10) >> 4;
int bank = (attributes & 0x01) + ((attributes & 0x02) ? state->m_sprite_bank : 0);
int tile_number = (src[0]+256*bank);
int sx = src[0x400+1] + 256*(src[0x801]&1) - 0x38;
int sy = 240 - src[0x400] - (size ? 16 : 0);
int xflip = attributes & 0x04;
int yflip = attributes & 0x08;
int color = src[1] & 0x1f;
int x,y;
if (flip_screen_get(machine))
{
xflip = !xflip;
yflip = !yflip;
}
for (y = 0; y <= size; y++)
{
for (x = 0; x <= size; x++)
{
int ex = xflip ? (size - x) : x;
int ey = yflip ? (size - y) : y;
int t = tile_offset[ey][ex] + tile_number;
drawgfx_transpen(bitmap,cliprect,machine.gfx[2],
t,
color,
xflip, yflip,
sx+x*16, sy+y*16,0);
}
}
}
}
SCREEN_UPDATE( ppking )
{
gladiatr_state *state = screen->machine().driver_data<gladiatr_state>();
tilemap_draw(bitmap,cliprect,state->m_bg_tilemap,0,0);
draw_sprites(screen->machine(), bitmap,cliprect);
/* the fg layer just selects the upper palette bank on underlying pixels */
{
bitmap_t *flagsbitmap;
int sx = cliprect->min_x;
int sy = cliprect->min_y;
tilemap_get_pixmap( state->m_fg_tilemap );
flagsbitmap = tilemap_get_flagsmap( state->m_fg_tilemap );
while( sy <= cliprect->max_y )
{
int x = sx;
int y = (sy + state->m_fg_scrolly) & 0x1ff;
UINT16 *dest = BITMAP_ADDR16(bitmap, sy, sx);
while( x <= cliprect->max_x )
{
if( *BITMAP_ADDR8(flagsbitmap, y, x)&TILEMAP_PIXEL_LAYER0 )
{
*dest += 512;
}
x++;
dest++;
} /* next x */
sy++;
} /* next y */
}
return 0;
}
SCREEN_UPDATE( gladiatr )
{
gladiatr_state *state = screen->machine().driver_data<gladiatr_state>();
if (state->m_video_attributes & 0x20)
{
int scroll;
scroll = state->m_bg_scrollx + ((state->m_video_attributes & 0x04) << 6);
tilemap_set_scrollx(state->m_bg_tilemap, 0, scroll ^ (flip_screen_get(screen->machine()) ? 0x0f : 0));
scroll = state->m_fg_scrollx + ((state->m_video_attributes & 0x08) << 5);
tilemap_set_scrollx(state->m_fg_tilemap, 0, scroll ^ (flip_screen_get(screen->machine()) ? 0x0f : 0));
// always 0 anyway
tilemap_set_scrolly(state->m_bg_tilemap, 0, state->m_bg_scrolly);
tilemap_set_scrolly(state->m_fg_tilemap, 0, state->m_fg_scrolly);
tilemap_draw(bitmap,cliprect,state->m_bg_tilemap,0,0);
draw_sprites(screen->machine(), bitmap,cliprect);
tilemap_draw(bitmap,cliprect,state->m_fg_tilemap,0,0);
}
else
bitmap_fill( bitmap, cliprect , get_black_pen(screen->machine()));
return 0;
}