/***************************************************************************
Atari Cyberball hardware
****************************************************************************/
#include "emu.h"
#include "machine/atarigen.h"
#include "video/atarimo.h"
#include "includes/cyberbal.h"
#define SCREEN_WIDTH (42*16)
/*************************************
*
* Tilemap callbacks
*
*************************************/
static TILE_GET_INFO( get_alpha_tile_info )
{
cyberbal_state *state = machine.driver_data<cyberbal_state>();
UINT16 data = state->m_alpha[tile_index];
int code = data & 0xfff;
int color = (data >> 12) & 0x07;
SET_TILE_INFO(2, code, color, (data >> 15) & 1);
}
static TILE_GET_INFO( get_alpha2_tile_info )
{
cyberbal_state *state = machine.driver_data<cyberbal_state>();
UINT16 data = state->m_alpha2[tile_index];
int code = data & 0xfff;
int color = (data >> 12) & 0x07;
SET_TILE_INFO(2, code, 0x80 | color, (data >> 15) & 1);
}
static TILE_GET_INFO( get_playfield_tile_info )
{
cyberbal_state *state = machine.driver_data<cyberbal_state>();
UINT16 data = state->m_playfield[tile_index];
int code = data & 0x1fff;
int color = (data >> 11) & 0x0f;
SET_TILE_INFO(0, code, color, (data >> 15) & 1);
}
static TILE_GET_INFO( get_playfield2_tile_info )
{
cyberbal_state *state = machine.driver_data<cyberbal_state>();
UINT16 data = state->m_playfield2[tile_index];
int code = data & 0x1fff;
int color = (data >> 11) & 0x0f;
SET_TILE_INFO(0, code, 0x80 | color, (data >> 15) & 1);
}
/*************************************
*
* Video system start
*
*************************************/
static void video_start_cyberbal_common(running_machine &machine, int screens)
{
static const atarimo_desc mo0desc =
{
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? */
0, /* render in swapped X/Y order? */
1, /* 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) */
0x600, /* base palette entry */
0x100, /* maximum number of colors */
0, /* transparent pen index */
{{ 0,0,0x07f8,0 }}, /* mask for the link */
{{ 0 }}, /* mask for the graphics bank */
{{ 0x7fff,0,0,0 }}, /* 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 */
{{ 0,0xff80,0,0 }}, /* mask for the Y position */
{{ 0 }}, /* mask for the width, in tiles*/
{{ 0,0x000f,0,0 }}, /* mask for the height, in tiles */
{{ 0x8000,0,0,0 }}, /* mask for the horizontal flip */
{{ 0 }}, /* mask for the vertical flip */
{{ 0 }}, /* mask for the priority */
{{ 0,0,0,0x0010 }}, /* mask for the neighbor */
{{ 0 }}, /* mask for absolute coordinates */
{{ 0 }}, /* mask for the special value */
0, /* resulting value to indicate "special" */
0 /* callback routine for special entries */
};
static const atarimo_desc mo1desc =
{
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? */
0, /* render in swapped X/Y order? */
1, /* 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) */
0xe00, /* base palette entry */
0x100, /* maximum number of colors */
0, /* transparent pen index */
{{ 0,0,0x07f8,0 }}, /* mask for the link */
{{ 0 }}, /* mask for the graphics bank */
{{ 0x7fff,0,0,0 }}, /* 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 */
{{ 0,0xff80,0,0 }}, /* mask for the Y position */
{{ 0 }}, /* mask for the width, in tiles*/
{{ 0,0x000f,0,0 }}, /* mask for the height, in tiles */
{{ 0x8000,0,0,0 }}, /* mask for the horizontal flip */
{{ 0 }}, /* mask for the vertical flip */
{{ 0 }}, /* mask for the priority */
{{ 0,0,0,0x0010 }}, /* mask for the neighbor */
{{ 0 }}, /* mask for absolute coordinates */
{{ 0 }}, /* mask for the special value */
0, /* resulting value to indicate "special" */
0 /* callback routine for special entries */
};
cyberbal_state *state = machine.driver_data<cyberbal_state>();
/* initialize the playfield */
state->m_playfield_tilemap = tilemap_create(machine, get_playfield_tile_info, tilemap_scan_rows, 16,8, 64,64);
/* initialize the motion objects */
atarimo_init(machine, 0, &mo0desc);
atarimo_set_slipram(0, &state->m_current_slip[0]);
/* initialize the alphanumerics */
state->m_alpha_tilemap = tilemap_create(machine, get_alpha_tile_info, tilemap_scan_rows, 16,8, 64,32);
tilemap_set_transparent_pen(state->m_alpha_tilemap, 0);
/* allocate the second screen if necessary */
if (screens == 2)
{
/* initialize the playfield */
state->m_playfield2_tilemap = tilemap_create(machine, get_playfield2_tile_info, tilemap_scan_rows, 16,8, 64,64);
tilemap_set_scrollx(state->m_playfield2_tilemap, 0, 0);
/* initialize the motion objects */
atarimo_init(machine, 1, &mo1desc);
atarimo_set_slipram(1, &state->m_current_slip[1]);
/* initialize the alphanumerics */
state->m_alpha2_tilemap = tilemap_create(machine, get_alpha2_tile_info, tilemap_scan_rows, 16,8, 64,32);
tilemap_set_scrollx(state->m_alpha2_tilemap, 0, 0);
tilemap_set_transparent_pen(state->m_alpha2_tilemap, 0);
}
/* save states */
state->save_item(NAME(state->m_current_slip));
state->save_item(NAME(state->m_playfield_palette_bank));
state->save_item(NAME(state->m_playfield_xscroll));
state->save_item(NAME(state->m_playfield_yscroll));
}
VIDEO_START( cyberbal )
{
video_start_cyberbal_common(machine, 2);
/* adjust the sprite positions */
atarimo_set_xscroll(0, 4);
atarimo_set_xscroll(1, 4);
}
VIDEO_START( cyberbal2p )
{
video_start_cyberbal_common(machine, 1);
/* adjust the sprite positions */
atarimo_set_xscroll(0, 5);
}
/*************************************
*
* Palette tweaker
*
*************************************/
INLINE void set_palette_entry(running_machine &machine, int entry, UINT16 value)
{
int r, g, b;
r = ((value >> 9) & 0x3e) | ((value >> 15) & 1);
g = ((value >> 4) & 0x3e) | ((value >> 15) & 1);
b = ((value << 1) & 0x3e) | ((value >> 15) & 1);
palette_set_color_rgb(machine, entry, pal6bit(r), pal6bit(g), pal6bit(b));
}
/*************************************
*
* Palette RAM write handlers
*
*************************************/
WRITE16_HANDLER( cyberbal_paletteram_0_w )
{
cyberbal_state *state = space->machine().driver_data<cyberbal_state>();
COMBINE_DATA(&state->m_paletteram_0[offset]);
set_palette_entry(space->machine(), offset, state->m_paletteram_0[offset]);
}
READ16_HANDLER( cyberbal_paletteram_0_r )
{
cyberbal_state *state = space->machine().driver_data<cyberbal_state>();
return state->m_paletteram_0[offset];
}
WRITE16_HANDLER( cyberbal_paletteram_1_w )
{
cyberbal_state *state = space->machine().driver_data<cyberbal_state>();
COMBINE_DATA(&state->m_paletteram_1[offset]);
set_palette_entry(space->machine(), offset + 0x800, state->m_paletteram_1[offset]);
}
READ16_HANDLER( cyberbal_paletteram_1_r )
{
cyberbal_state *state = space->machine().driver_data<cyberbal_state>();
return state->m_paletteram_1[offset];
}
/*************************************
*
* Periodic scanline updater
*
*************************************/
void cyberbal_scanline_update(screen_device &screen, int scanline)
{
cyberbal_state *state = screen.machine().driver_data<cyberbal_state>();
int i;
screen_device *update_screen;
/* loop over screens */
for (i = 0, update_screen = screen.machine().first_screen(); update_screen != NULL; i++, update_screen = update_screen->next_screen())
{
UINT16 *vram = i ? state->m_alpha2 : state->m_alpha;
UINT16 *base = &vram[((scanline - 8) / 8) * 64 + 47];
/* keep in range */
if (base < vram)
base += 0x800;
else if (base >= &vram[0x800])
return;
/* update the current parameters */
if (!(base[3] & 1))
{
if (((base[3] >> 1) & 7) != state->m_playfield_palette_bank[i])
{
if (scanline > 0)
update_screen->update_partial(scanline - 1);
state->m_playfield_palette_bank[i] = (base[3] >> 1) & 7;
tilemap_set_palette_offset(i ? state->m_playfield2_tilemap : state->m_playfield_tilemap, state->m_playfield_palette_bank[i] << 8);
}
}
if (!(base[4] & 1))
{
int newscroll = 2 * (((base[4] >> 7) + 4) & 0x1ff);
if (newscroll != state->m_playfield_xscroll[i])
{
if (scanline > 0)
update_screen->update_partial(scanline - 1);
tilemap_set_scrollx(i ? state->m_playfield2_tilemap : state->m_playfield_tilemap, 0, newscroll);
state->m_playfield_xscroll[i] = newscroll;
}
}
if (!(base[5] & 1))
{
/* a new vscroll latches the offset into a counter; we must adjust for this */
int newscroll = ((base[5] >> 7) - (scanline)) & 0x1ff;
if (newscroll != state->m_playfield_yscroll[i])
{
if (scanline > 0)
update_screen->update_partial(scanline - 1);
tilemap_set_scrolly(i ? state->m_playfield2_tilemap : state->m_playfield_tilemap, 0, newscroll);
state->m_playfield_yscroll[i] = newscroll;
}
}
if (!(base[7] & 1))
{
if (state->m_current_slip[i] != base[7])
{
if (scanline > 0)
update_screen->update_partial(scanline - 1);
state->m_current_slip[i] = base[7];
}
}
}
}
/*************************************
*
* Main refresh
*
*************************************/
static void update_one_screen(screen_device &screen, bitmap_t *bitmap, const rectangle *cliprect)
{
cyberbal_state *state = screen.machine().driver_data<cyberbal_state>();
atarimo_rect_list rectlist;
rectangle tempclip = *cliprect;
bitmap_t *mobitmap;
int x, y, r, mooffset, temp;
rectangle visarea = screen.visible_area();
/* for 2p games, the left screen is the main screen */
device_t *left_screen = screen.machine().device("lscreen");
if (left_screen == NULL)
left_screen = screen.machine().device("screen");
/* draw the playfield */
tilemap_draw(bitmap, cliprect, (&screen == left_screen) ? state->m_playfield_tilemap : state->m_playfield2_tilemap, 0, 0);
/* draw the MOs -- note some kludging to get this to work correctly for 2 screens */
mooffset = 0;
tempclip.min_x -= mooffset;
tempclip.max_x -= mooffset;
temp = visarea.max_x;
if (temp > SCREEN_WIDTH)
visarea.max_x /= 2;
mobitmap = atarimo_render((&screen == left_screen) ? 0 : 1, cliprect, &rectlist);
tempclip.min_x += mooffset;
tempclip.max_x += mooffset;
visarea.max_x = temp;
/* draw and merge the MO */
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 + mooffset;
for (x = rectlist.rect->min_x; x <= rectlist.rect->max_x; x++)
if (mo[x])
{
/* not verified: logic is all controlled in a PAL
*/
pf[x] = mo[x];
/* erase behind ourselves */
mo[x] = 0;
}
}
/* add the alpha on top */
tilemap_draw(bitmap, cliprect, (&screen == left_screen) ? state->m_alpha_tilemap : state->m_alpha2_tilemap, 0, 0);
}
SCREEN_UPDATE( cyberbal )
{
update_one_screen(*screen, bitmap, cliprect);
return 0;
}