// remaining gfx glitches
// layer priority register not fully understood
#include "emu.h"
#include "includes/drgnmst.h"
static TILE_GET_INFO( get_drgnmst_fg_tile_info )
{
drgnmst_state *state = machine.driver_data<drgnmst_state>();
int tileno, colour, flipyx;
tileno = state->m_fg_videoram[tile_index * 2] & 0xfff;
colour = state->m_fg_videoram[tile_index * 2 + 1] & 0x1f;
flipyx = (state->m_fg_videoram[tile_index * 2 + 1] & 0x60)>>5;
SET_TILE_INFO(1, tileno, colour, TILE_FLIPYX(flipyx));
}
WRITE16_HANDLER( drgnmst_fg_videoram_w )
{
drgnmst_state *state = space->machine().driver_data<drgnmst_state>();
COMBINE_DATA(&state->m_fg_videoram[offset]);
tilemap_mark_tile_dirty(state->m_fg_tilemap, offset / 2);
}
static TILE_GET_INFO( get_drgnmst_bg_tile_info )
{
drgnmst_state *state = machine.driver_data<drgnmst_state>();
int tileno, colour, flipyx;
tileno = (state->m_bg_videoram[tile_index * 2]& 0x1fff) + 0x800;
colour = state->m_bg_videoram[tile_index * 2 + 1] & 0x1f;
flipyx = (state->m_bg_videoram[tile_index * 2 + 1] & 0x60) >> 5;
SET_TILE_INFO(3, tileno, colour, TILE_FLIPYX(flipyx));
}
WRITE16_HANDLER( drgnmst_bg_videoram_w )
{
drgnmst_state *state = space->machine().driver_data<drgnmst_state>();
COMBINE_DATA(&state->m_bg_videoram[offset]);
tilemap_mark_tile_dirty(state->m_bg_tilemap, offset / 2);
}
static TILE_GET_INFO( get_drgnmst_md_tile_info )
{
drgnmst_state *state = machine.driver_data<drgnmst_state>();
int tileno, colour, flipyx;
tileno = (state->m_md_videoram[tile_index * 2] & 0x7fff) - 0x2000;
colour = state->m_md_videoram[tile_index * 2 + 1] & 0x1f;
flipyx = (state->m_md_videoram[tile_index * 2 + 1] & 0x60) >> 5;
SET_TILE_INFO(2, tileno, colour, TILE_FLIPYX(flipyx));
}
WRITE16_HANDLER( drgnmst_md_videoram_w )
{
drgnmst_state *state = space->machine().driver_data<drgnmst_state>();
COMBINE_DATA(&state->m_md_videoram[offset]);
tilemap_mark_tile_dirty(state->m_md_tilemap, offset / 2);
}
static void draw_sprites( running_machine &machine, bitmap_t *bitmap,const rectangle *cliprect )
{
drgnmst_state *state = machine.driver_data<drgnmst_state>();
const gfx_element *gfx = machine.gfx[0];
UINT16 *source = state->m_spriteram;
UINT16 *finish = source + 0x800 / 2;
while (source < finish)
{
int xpos, ypos, number, flipx, flipy, wide, high;
int x, y;
int incx, incy;
int colr;
number = source[2];
xpos = source[0];
ypos = source[1];
flipx = source[3] & 0x0020;
flipy = source[3] & 0x0040;
wide = (source[3] & 0x0f00) >> 8;
high = (source[3] & 0xf000) >> 12;
colr = (source[3] & 0x001f);
if ((source[3] & 0xff00) == 0xff00) break;
if (!flipx) { incx = 16;} else { incx = -16; xpos += 16 * wide; }
if (!flipy) { incy = 16;} else { incy = -16; ypos += 16 * high; }
for (y = 0; y <= high; y++)
{
for (x = 0; x <= wide; x++)
{
int realx, realy, realnumber;
realx = xpos + incx * x;
realy = ypos + incy * y;
realnumber = number + x + y * 16;
drawgfx_transpen(bitmap, cliprect, gfx, realnumber, colr, flipx, flipy, realx, realy, 15);
}
}
source += 4;
}
}
static TILEMAP_MAPPER( drgnmst_fg_tilemap_scan_cols )
{
return (col * 32) + (row & 0x1f) + ((row & 0xe0) >> 5) * 2048;
}
static TILEMAP_MAPPER( drgnmst_md_tilemap_scan_cols )
{
return (col * 16) + (row & 0x0f) + ((row & 0xf0) >> 4) * 1024;
}
static TILEMAP_MAPPER( drgnmst_bg_tilemap_scan_cols )
{
return (col * 8) + (row & 0x07) + ((row & 0xf8) >> 3) * 512;
}
VIDEO_START(drgnmst)
{
drgnmst_state *state = machine.driver_data<drgnmst_state>();
state->m_fg_tilemap = tilemap_create(machine, get_drgnmst_fg_tile_info, drgnmst_fg_tilemap_scan_cols, 8, 8, 64,64);
tilemap_set_transparent_pen(state->m_fg_tilemap, 15);
state->m_md_tilemap = tilemap_create(machine, get_drgnmst_md_tile_info, drgnmst_md_tilemap_scan_cols, 16, 16, 64,64);
tilemap_set_transparent_pen(state->m_md_tilemap, 15);
state->m_bg_tilemap = tilemap_create(machine, get_drgnmst_bg_tile_info, drgnmst_bg_tilemap_scan_cols, 32, 32, 64,64);
tilemap_set_transparent_pen(state->m_bg_tilemap, 15);
// do the other tilemaps have rowscroll too? probably not ..
tilemap_set_scroll_rows(state->m_md_tilemap, 1024);
}
SCREEN_UPDATE(drgnmst)
{
drgnmst_state *state = screen->machine().driver_data<drgnmst_state>();
int y, rowscroll_bank;
tilemap_set_scrollx(state->m_bg_tilemap, 0, state->m_vidregs[10] - 18); // verify
tilemap_set_scrolly(state->m_bg_tilemap, 0, state->m_vidregs[11]); // verify
// tilemap_set_scrollx(state->m_md_tilemap,0, state->m_vidregs[8] - 16); // rowscrolled
tilemap_set_scrolly(state->m_md_tilemap,0, state->m_vidregs[9]); // verify
tilemap_set_scrollx(state->m_fg_tilemap,0, state->m_vidregs[6] - 18); // verify (test mode colour test needs it)
tilemap_set_scrolly(state->m_fg_tilemap,0, state->m_vidregs[7]); // verify
rowscroll_bank = (state->m_vidregs[4] & 0x30) >> 4;
for (y = 0; y < 1024; y++)
tilemap_set_scrollx(state->m_md_tilemap, y, state->m_vidregs[8] - 16 + state->m_rowscrollram[y + 0x800 * rowscroll_bank]);
// todo: figure out which bits relate to the order
switch (state->m_vidregs2[0])
{
case 0x2451: // fg unsure
case 0x2d9a: // fg unsure
case 0x2440: // all ok
case 0x245a: // fg unsure, title screen
tilemap_draw(bitmap, cliprect, state->m_fg_tilemap, TILEMAP_DRAW_OPAQUE, 0);
tilemap_draw(bitmap, cliprect, state->m_md_tilemap, 0, 0);
tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0);
break;
case 0x23c0: // all ok
tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, TILEMAP_DRAW_OPAQUE, 0);
tilemap_draw(bitmap, cliprect, state->m_fg_tilemap, 0, 0);
tilemap_draw(bitmap, cliprect, state->m_md_tilemap, 0, 0);
break;
case 0x38da: // fg unsure
case 0x215a: // fg unsure
case 0x2140: // all ok
tilemap_draw(bitmap, cliprect, state->m_fg_tilemap, TILEMAP_DRAW_OPAQUE, 0);
tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0);
tilemap_draw(bitmap, cliprect, state->m_md_tilemap, 0, 0);
break;
case 0x2d80: // all ok
tilemap_draw(bitmap, cliprect, state->m_md_tilemap, TILEMAP_DRAW_OPAQUE, 0);
tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0);
tilemap_draw(bitmap, cliprect, state->m_fg_tilemap, 0, 0);
break;
default:
tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, TILEMAP_DRAW_OPAQUE, 0);
tilemap_draw(bitmap, cliprect, state->m_fg_tilemap, 0, 0);
tilemap_draw(bitmap, cliprect, state->m_md_tilemap, 0, 0);
logerror ("unknown video priority regs %04x\n", state->m_vidregs2[0]);
}
draw_sprites(screen->machine(),bitmap,cliprect);
// popmessage ("x %04x x %04x x %04x x %04x x %04x", state->m_vidregs2[0], state->m_vidregs[12], state->m_vidregs[13], state->m_vidregs[14], state->m_vidregs[15]);
// popmessage ("x %04x x %04x y %04x y %04x z %04x z %04x",state->m_vidregs[0],state->m_vidregs[1],state->m_vidregs[2],state->m_vidregs[3],state->m_vidregs[4],state->m_vidregs[5]);
return 0;
}