/***************************************************************************
Atari Toobin' hardware
****************************************************************************/
#include "driver.h"
#include "machine/atarigen.h"
#include "toobin.h"
/*************************************
*
* Globals we own
*
*************************************/
static double brightness;
static bitmap_t *pfbitmap;
/*************************************
*
* Tilemap callbacks
*
*************************************/
static TILE_GET_INFO( get_alpha_tile_info )
{
UINT16 data = atarigen_alpha[tile_index];
int code = data & 0x3ff;
int color = (data >> 12) & 0x0f;
SET_TILE_INFO(2, code, color, (data >> 10) & 1);
}
static TILE_GET_INFO( get_playfield_tile_info )
{
UINT16 data1 = atarigen_playfield[tile_index * 2];
UINT16 data2 = atarigen_playfield[tile_index * 2 + 1];
int code = data2 & 0x3fff;
int color = data1 & 0x0f;
SET_TILE_INFO(0, code, color, TILE_FLIPYX(data2 >> 14));
tileinfo->category = (data1 >> 4) & 3;
}
/*************************************
*
* Video system start
*
*************************************/
VIDEO_START( toobin )
{
static const 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? */
0, /* render in reverse order? */
1, /* render in swapped X/Y order? */
0, /* does the neighbor bit affect the next object? */
1024, /* 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 */
{{ 0,0,0x00ff,0 }}, /* mask for the link */
{{ 0 }}, /* mask for the graphics bank */
{{ 0,0x3fff,0,0 }}, /* mask for the code index */
{{ 0 }}, /* mask for the upper code index */
{{ 0,0,0,0x000f }}, /* mask for the color */
{{ 0,0,0,0xffc0 }}, /* mask for the X position */
{{ 0x7fc0,0,0,0 }}, /* mask for the Y position */
{{ 0x0007,0,0,0 }}, /* mask for the width, in tiles*/
{{ 0x0038,0,0,0 }}, /* mask for the height, in tiles */
{{ 0,0x4000,0,0 }}, /* mask for the horizontal flip */
{{ 0,0x8000,0,0 }}, /* mask for the vertical flip */
{{ 0 }}, /* mask for the priority */
{{ 0 }}, /* mask for the neighbor */
{{ 0x8000,0,0,0 }}, /* mask for absolute coordinates */
{{ 0 }}, /* mask for the special value */
0, /* resulting value to indicate "special" */
0 /* callback routine for special entries */
};
/* initialize the playfield */
atarigen_playfield_tilemap = tilemap_create(get_playfield_tile_info, tilemap_scan_rows, 8,8, 128,64);
/* initialize the motion objects */
atarimo_init(machine, 0, &modesc);
/* initialize the alphanumerics */
atarigen_alpha_tilemap = tilemap_create(get_alpha_tile_info, tilemap_scan_rows, 8,8, 64,48);
tilemap_set_transparent_pen(atarigen_alpha_tilemap, 0);
/* allocate a playfield bitmap for rendering */
pfbitmap = auto_bitmap_alloc(video_screen_get_width(machine->primary_screen), video_screen_get_height(machine->primary_screen), BITMAP_FORMAT_INDEXED16);
}
/*************************************
*
* Palette RAM write handler
*
*************************************/
WRITE16_HANDLER( toobin_paletteram_w )
{
int newword;
COMBINE_DATA(&paletteram16[offset]);
newword = paletteram16[offset];
{
int red = (((newword >> 10) & 31) * 224) >> 5;
int green = (((newword >> 5) & 31) * 224) >> 5;
int blue = (((newword ) & 31) * 224) >> 5;
if (red) red += 38;
if (green) green += 38;
if (blue) blue += 38;
palette_set_color(machine, offset & 0x3ff, MAKE_RGB(red, green, blue));
if (!(newword & 0x8000))
palette_set_pen_contrast(machine, offset & 0x3ff, brightness);
else
palette_set_pen_contrast(machine, offset & 0x3ff, 1.0);
}
}
WRITE16_HANDLER( toobin_intensity_w )
{
int i;
if (ACCESSING_BITS_0_7)
{
brightness = (double)(~data & 0x1f) / 31.0;
for (i = 0; i < 0x400; i++)
if (!(paletteram16[i] & 0x8000))
palette_set_pen_contrast(machine, i, brightness);
}
}
/*************************************
*
* X/Y scroll handlers
*
*************************************/
WRITE16_HANDLER( toobin_xscroll_w )
{
UINT16 oldscroll = *atarigen_xscroll;
UINT16 newscroll = oldscroll;
COMBINE_DATA(&newscroll);
/* if anything has changed, force a partial update */
if (newscroll != oldscroll)
video_screen_update_partial(machine->primary_screen, video_screen_get_vpos(machine->primary_screen));
/* update the playfield scrolling - hscroll is clocked on the following scanline */
tilemap_set_scrollx(atarigen_playfield_tilemap, 0, newscroll >> 6);
atarimo_set_xscroll(0, newscroll >> 6);
/* update the data */
*atarigen_xscroll = newscroll;
}
WRITE16_HANDLER( toobin_yscroll_w )
{
UINT16 oldscroll = *atarigen_yscroll;
UINT16 newscroll = oldscroll;
COMBINE_DATA(&newscroll);
/* if anything has changed, force a partial update */
if (newscroll != oldscroll)
video_screen_update_partial(machine->primary_screen, video_screen_get_vpos(machine->primary_screen));
/* if bit 4 is zero, the scroll value is clocked in right away */
tilemap_set_scrolly(atarigen_playfield_tilemap, 0, newscroll >> 6);
atarimo_set_yscroll(0, (newscroll >> 6) & 0x1ff);
/* update the data */
*atarigen_yscroll = newscroll;
}
/*************************************
*
* X/Y scroll handlers
*
*************************************/
WRITE16_HANDLER( toobin_slip_w )
{
int oldslip = atarimo_0_slipram[offset];
int newslip = oldslip;
COMBINE_DATA(&newslip);
/* if the SLIP is changing, force a partial update first */
if (oldslip != newslip)
video_screen_update_partial(machine->primary_screen, video_screen_get_vpos(machine->primary_screen));
/* update the data */
atarimo_0_slipram_w(machine, offset, data, mem_mask);
}
/*************************************
*
* Main refresh
*
*************************************/
VIDEO_UPDATE( toobin )
{
const rgb_t *palette = palette_entry_list_adjusted(screen->machine->palette);
atarimo_rect_list rectlist;
bitmap_t *mobitmap;
int x, y;
/* draw the playfield */
fillbitmap(priority_bitmap, 0, cliprect);
tilemap_draw(pfbitmap, cliprect, atarigen_playfield_tilemap, 0, 0);
tilemap_draw(pfbitmap, cliprect, atarigen_playfield_tilemap, 1, 1);
tilemap_draw(pfbitmap, cliprect, atarigen_playfield_tilemap, 2, 2);
tilemap_draw(pfbitmap, cliprect, atarigen_playfield_tilemap, 3, 3);
/* draw and merge the MO */
mobitmap = atarimo_render(0, cliprect, &rectlist);
for (y = cliprect->min_y; y <= cliprect->max_y; y++)
{
UINT32 *dest = BITMAP_ADDR32(bitmap, y, 0);
UINT16 *mo = BITMAP_ADDR16(mobitmap, y, 0);
UINT16 *pf = BITMAP_ADDR16(pfbitmap, y, 0);
UINT8 *pri = BITMAP_ADDR8(priority_bitmap, y, 0);
for (x = cliprect->min_x; x <= cliprect->max_x; x++)
{
UINT16 pix = pf[x];
if (mo[x])
{
/* not verified: logic is all controlled in a PAL
factors: LBPRI1-0, LBPIX3, ANPIX1-0, PFPIX3, PFPRI1-0,
(~LBPIX3 & ~LBPIX2 & ~LBPIX1 & ~LBPIX0)
*/
/* only draw if not high priority PF */
if (!pri[x] || !(pix & 8))
pix = mo[x];
/* erase behind ourselves */
mo[x] = 0;
}
dest[x] = palette[pix];
}
}
/* add the alpha on top */
tilemap_draw(bitmap, cliprect, atarigen_alpha_tilemap, 0, 0);
return 0;
}