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// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************
Atari Bad Lands hardware
***************************************************************************/
#include "emu.h"
#include "video/atarimo.h"
#include "includes/badlands.h"
/*************************************
*
* Tilemap callbacks
*
*************************************/
TILE_GET_INFO_MEMBER(badlands_state::get_playfield_tile_info)
{
uint16_t data = m_playfield_tilemap->basemem_read(tile_index);
int code = (data & 0x1fff) + ((data & 0x1000) ? (m_playfield_tile_bank << 12) : 0);
int color = (data >> 13) & 0x07;
tileinfo.set(0, code, color, 0);
}
/*************************************
*
* Generic video system start
*
*************************************/
const atari_motion_objects_config badlands_state::s_mob_config =
{
1, /* index to which gfx system */
1, /* number of motion object banks */
0, /* are the entries linked? */
1, /* are the entries split? */
0, /* render in reverse order? */
0, /* render in swapped X/Y order? */
0, /* does the neighbor bit affect the next object? */
0, /* pixels per SLIP entry (0 for no-slip) */
0, /* pixel offset for SLIPs */
0, /* maximum number of links to visit/scanline (0=all) */
0x80, /* base palette entry */
0x80, /* maximum number of colors */
0, /* transparent pen index */
{{ 0x003f }}, /* mask for the link */
{{ 0x0fff,0,0,0 }}, /* mask for the code index */
{{ 0,0,0,0x0007 }}, /* mask for the color */
{{ 0,0,0,0xff80 }}, /* 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 */
{{ 0 }}, /* mask for the horizontal flip */
{{ 0 }}, /* mask for the vertical flip */
{{ 0,0,0,0x0008 }}, /* 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" */
};
void badlands_state::video_start()
{
/* save states */
save_item(NAME(m_playfield_tile_bank));
}
/*************************************
*
* Playfield bank write handler
*
*************************************/
void badlands_state::badlands_pf_bank_w(offs_t offset, uint16_t data, uint16_t mem_mask)
{
if (ACCESSING_BITS_0_7)
if (m_playfield_tile_bank != (data & 1))
{
m_screen->update_partial(m_screen->vpos());
m_playfield_tile_bank = data & 1;
m_playfield_tilemap->mark_all_dirty();
}
}
/*************************************
*
* Main refresh
*
*************************************/
uint32_t badlands_state::screen_update_badlands(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
// start drawing
m_mob->draw_async(cliprect);
// draw the playfield
m_playfield_tilemap->draw(screen, bitmap, cliprect, 0, 0);
// draw and merge the MO
bitmap_ind16 &mobitmap = m_mob->bitmap();
for (const sparse_dirty_rect *rect = m_mob->first_dirty_rect(cliprect); rect != nullptr; rect = rect->next())
for (int y = rect->top(); y <= rect->bottom(); y++)
{
uint16_t const *const mo = &mobitmap.pix(y);
uint16_t *const pf = &bitmap.pix(y);
for (int x = rect->left(); x <= rect->right(); x++)
if (mo[x] != 0xffff)
{
// not yet verified
if ((mo[x] & atari_motion_objects_device::PRIORITY_MASK) || !(pf[x] & 8))
pf[x] = mo[x] & atari_motion_objects_device::DATA_MASK;
}
}
return 0;
}
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