/***************************************************************************
Atari Batman hardware
****************************************************************************/
#include "driver.h"
#include "machine/atarigen.h"
#include "batman.h"
#include "thunderj.h"
/*************************************
*
* Globals
*
*************************************/
UINT8 batman_alpha_tile_bank;
/*************************************
*
* Tilemap callbacks
*
*************************************/
static TILE_GET_INFO( get_alpha_tile_info )
{
UINT16 data = atarigen_alpha[tile_index];
int code = ((data & 0x400) ? (batman_alpha_tile_bank * 0x400) : 0) + (data & 0x3ff);
int color = (data >> 11) & 0x0f;
int opaque = data & 0x8000;
SET_TILE_INFO(2, code, color, opaque ? TILE_FORCE_LAYER0 : 0);
}
static TILE_GET_INFO( get_playfield_tile_info )
{
UINT16 data1 = atarigen_playfield[tile_index];
UINT16 data2 = atarigen_playfield_upper[tile_index] & 0xff;
int code = data1 & 0x7fff;
int color = 0x10 + (data2 & 0x0f);
SET_TILE_INFO(0, code, color, (data1 >> 15) & 1);
tileinfo->category = (data2 >> 4) & 3;
}
static TILE_GET_INFO( get_playfield2_tile_info )
{
UINT16 data1 = atarigen_playfield2[tile_index];
UINT16 data2 = atarigen_playfield_upper[tile_index] >> 8;
int code = data1 & 0x7fff;
int color = data2 & 0x0f;
SET_TILE_INFO(0, code, color, (data1 >> 15) & 1);
tileinfo->category = (data2 >> 4) & 3;
}
/*************************************
*
* Video system start
*
*************************************/
VIDEO_START( batman )
{
static const struct atarimo_desc modesc =
{
1, /* index to which gfx system */
1, /* number of motion object banks */
1, /* are the entries linked? */
0, /* are the entries split? */
1, /* render in reverse order? */
0, /* render in swapped X/Y order? */
0, /* does the neighbor bit affect the next object? */
8, /* pixels per SLIP entry (0 for no-slip) */
0, /* pixel offset for SLIPs */
0, /* maximum number of links to visit/scanline (0=all) */
0x100, /* base palette entry */
0x100, /* maximum number of colors */
0, /* transparent pen index */
{{ 0x03ff,0,0,0 }}, /* mask for the link */
{{ 0 }}, /* mask for the graphics bank */
{{ 0,0x7fff,0,0 }}, /* mask for the code index */
{{ 0 }}, /* mask for the upper code index */
{{ 0,0,0x000f,0 }}, /* mask for the color */
{{ 0,0,0xff80,0 }}, /* mask for the X position */
{{ 0,0,0,0xff80 }}, /* mask for the Y position */
{{ 0,0,0,0x0070 }}, /* mask for the width, in tiles*/
{{ 0,0,0,0x0007 }}, /* mask for the height, in tiles */
{{ 0,0x8000,0,0 }}, /* mask for the horizontal flip */
{{ 0 }}, /* mask for the vertical flip */
{{ 0,0,0x0070,0 }}, /* mask for the priority */
{{ 0 }}, /* mask for the neighbor */
{{ 0 }}, /* mask for absolute coordinates */
{{ 0 }}, /* mask for the special value */
0, /* resulting value to indicate "special" */
NULL /* callback routine for special entries */
};
/* initialize the playfield */
atarigen_playfield_tilemap = tilemap_create(get_playfield_tile_info, tilemap_scan_cols, TILEMAP_TYPE_PEN, 8,8, 64,64);
/* initialize the second playfield */
atarigen_playfield2_tilemap = tilemap_create(get_playfield2_tile_info, tilemap_scan_cols, TILEMAP_TYPE_PEN, 8,8, 64,64);
tilemap_set_transparent_pen(atarigen_playfield2_tilemap, 0);
/* initialize the motion objects */
atarimo_init(machine, 0, &modesc);
/* initialize the alphanumerics */
atarigen_alpha_tilemap = tilemap_create(get_alpha_tile_info, tilemap_scan_rows, TILEMAP_TYPE_PEN, 8,8, 64,32);
tilemap_set_transparent_pen(atarigen_alpha_tilemap, 0);
}
/*************************************
*
* Periodic scanline updater
*
*************************************/
void batman_scanline_update(running_machine *machine, int scrnum, int scanline)
{
/* update the scanline parameters */
if (scanline <= machine->screen[scrnum].visarea.max_y && atarivc_state.rowscroll_enable)
{
UINT16 *base = &atarigen_alpha[scanline / 8 * 64 + 48];
int scan, i;
for (scan = 0; scan < 8; scan++, scanline++)
for (i = 0; i < 2; i++)
{
int data = *base++;
switch (data & 15)
{
case 9:
video_screen_update_partial(0, scanline - 1);
atarivc_state.mo_xscroll = (data >> 7) & 0x1ff;
atarimo_set_xscroll(0, atarivc_state.mo_xscroll);
break;
case 10:
video_screen_update_partial(0, scanline - 1);
atarivc_state.pf1_xscroll_raw = (data >> 7) & 0x1ff;
atarivc_update_pf_xscrolls();
tilemap_set_scrollx(atarigen_playfield_tilemap, 0, atarivc_state.pf0_xscroll);
tilemap_set_scrollx(atarigen_playfield2_tilemap, 0, atarivc_state.pf1_xscroll);
break;
case 11:
video_screen_update_partial(0, scanline - 1);
atarivc_state.pf0_xscroll_raw = (data >> 7) & 0x1ff;
atarivc_update_pf_xscrolls();
tilemap_set_scrollx(atarigen_playfield_tilemap, 0, atarivc_state.pf0_xscroll);
break;
case 13:
video_screen_update_partial(0, scanline - 1);
atarivc_state.mo_yscroll = (data >> 7) & 0x1ff;
atarimo_set_yscroll(0, atarivc_state.mo_yscroll);
break;
case 14:
video_screen_update_partial(0, scanline - 1);
atarivc_state.pf1_yscroll = (data >> 7) & 0x1ff;
tilemap_set_scrolly(atarigen_playfield2_tilemap, 0, atarivc_state.pf1_yscroll);
break;
case 15:
video_screen_update_partial(0, scanline - 1);
atarivc_state.pf0_yscroll = (data >> 7) & 0x1ff;
tilemap_set_scrolly(atarigen_playfield_tilemap, 0, atarivc_state.pf0_yscroll);
break;
}
}
}
}
/*************************************
*
* Main refresh
*
*************************************/
VIDEO_UPDATE( batman )
{
struct atarimo_rect_list rectlist;
mame_bitmap *mobitmap;
int x, y, r;
/* draw the playfield */
fillbitmap(priority_bitmap, 0, cliprect);
tilemap_draw(bitmap, cliprect, atarigen_playfield_tilemap, 0, 0x00);
tilemap_draw(bitmap, cliprect, atarigen_playfield_tilemap, 1, 0x01);
tilemap_draw(bitmap, cliprect, atarigen_playfield_tilemap, 2, 0x02);
tilemap_draw(bitmap, cliprect, atarigen_playfield_tilemap, 3, 0x03);
tilemap_draw(bitmap, cliprect, atarigen_playfield2_tilemap, 0, 0x80);
tilemap_draw(bitmap, cliprect, atarigen_playfield2_tilemap, 1, 0x84);
tilemap_draw(bitmap, cliprect, atarigen_playfield2_tilemap, 2, 0x88);
tilemap_draw(bitmap, cliprect, atarigen_playfield2_tilemap, 3, 0x8c);
/* draw and merge the MO */
mobitmap = atarimo_render(machine, 0, cliprect, &rectlist);
for (r = 0; r < rectlist.numrects; r++, rectlist.rect++)
for (y = rectlist.rect->min_y; y <= rectlist.rect->max_y; y++)
{
UINT16 *mo = (UINT16 *)mobitmap->base + mobitmap->rowpixels * y;
UINT16 *pf = (UINT16 *)bitmap->base + bitmap->rowpixels * y;
UINT8 *pri = (UINT8 *)priority_bitmap->base + priority_bitmap->rowpixels * y;
for (x = rectlist.rect->min_x; x <= rectlist.rect->max_x; x++)
if (mo[x])
{
/* verified on real hardware:
for all MO colors, MO priority 0:
obscured by low fg playfield pens priority 1-3
obscured by high fg playfield pens priority 3 only
obscured by bg playfield priority 3 only
for all MO colors, MO priority 1:
obscured by low fg playfield pens priority 2-3
obscured by high fg playfield pens priority 3 only
obscured by bg playfield priority 3 only
for all MO colors, MO priority 2-3:
obscured by low fg playfield pens priority 3 only
obscured by high fg playfield pens priority 3 only
obscured by bg playfield priority 3 only
*/
int mopriority = mo[x] >> ATARIMO_PRIORITY_SHIFT;
/* upper bit of MO priority signals special rendering and doesn't draw anything */
if (mopriority & 4)
continue;
/* foreground playfield case */
if (pri[x] & 0x80)
{
int pfpriority = (pri[x] >> 2) & 3;
/* playfield priority 3 always wins */
if (pfpriority == 3)
;
/* priority is consistent for upper pens in playfield */
else if (pf[x] & 0x08)
pf[x] = mo[x] & ATARIMO_DATA_MASK;
/* otherwise, we need to compare */
else if (mopriority >= pfpriority)
pf[x] = mo[x] & ATARIMO_DATA_MASK;
}
/* background playfield case */
else
{
int pfpriority = pri[x] & 3;
/* playfield priority 3 always wins */
if (pfpriority == 3)
;
/* otherwise, MOs get shown */
else
pf[x] = mo[x] & ATARIMO_DATA_MASK;
}
/* don't erase yet -- we need to make another pass later */
}
}
/* add the alpha on top */
tilemap_draw(bitmap, cliprect, atarigen_alpha_tilemap, 0, 0);
/* now go back and process the upper bit of MO priority */
rectlist.rect -= rectlist.numrects;
for (r = 0; r < rectlist.numrects; r++, rectlist.rect++)
for (y = rectlist.rect->min_y; y <= rectlist.rect->max_y; y++)
{
UINT16 *mo = (UINT16 *)mobitmap->base + mobitmap->rowpixels * y;
UINT16 *pf = (UINT16 *)bitmap->base + bitmap->rowpixels * y;
for (x = rectlist.rect->min_x; x <= rectlist.rect->max_x; x++)
if (mo[x])
{
int mopriority = mo[x] >> ATARIMO_PRIORITY_SHIFT;
/* upper bit of MO priority might mean palette kludges */
if (mopriority & 4)
{
/* if bit 2 is set, start setting high palette bits */
if (mo[x] & 2)
thunderj_mark_high_palette(bitmap, pf, mo, x, y);
}
/* erase behind ourselves */
mo[x] = 0;
}
}
return 0;
}