public uint32_t screen_update_pacman(screen_device screen, bitmap_ind16 bitmap, rectangle cliprect)
{
if (m_bgpriority != 0)
{
bitmap.fill(0, cliprect);
}
else
{
m_bg_tilemap.draw(screen, bitmap, cliprect, tilemap_global.TILEMAP_DRAW_OPAQUE, 0);
}
if (m_spriteram != null)
{
ListBytesPointer spriteram = m_spriteram.target; //uint8_t *spriteram = m_spriteram;
ListBytesPointer spriteram_2 = m_spriteram2.target; //uint8_t *spriteram_2 = m_spriteram2;
int offs;
rectangle spriteclip = new rectangle(2 * 8, 34 * 8 - 1, 0 * 8, 28 * 8 - 1);
spriteclip.intersection(cliprect); // spriteclip &= cliprect;
/* Draw the sprites. Note that it is important to draw them exactly in this */
/* order, to have the correct priorities. */
for (offs = (int)m_spriteram.bytes() - 2; offs > 2 * 2; offs -= 2)
{
int color;
int sx;
int sy;
byte fx;
byte fy;
if (m_inv_spr != 0)
{
sx = spriteram_2[offs + 1];
sy = 240 - (spriteram_2[offs]);
}
else
{
sx = 272 - spriteram_2[offs + 1];
sy = spriteram_2[offs] - 31;
}
fx = (byte)((spriteram[offs] & 1) ^ m_inv_spr);
fy = (byte)((spriteram[offs] & 2) ^ ((m_inv_spr) << 1));
color = (spriteram[offs + 1] & 0x1f) | (m_colortablebank << 5) | (m_palettebank << 6);
m_gfxdecode.target.digfx.gfx(1).transmask(bitmap, spriteclip,
(UInt32)((spriteram[offs] >> 2) | (m_spritebank << 6)),
(UInt32)color,
fx, fy,
sx, sy,
m_palette.target.palette_interface.transpen_mask(m_gfxdecode.target.digfx.gfx(1), (UInt32)color & 0x3f, 0));
/* also plot the sprite with wraparound (tunnel in Crush Roller) */
m_gfxdecode.target.digfx.gfx(1).transmask(bitmap, spriteclip,
(UInt32)((spriteram[offs] >> 2) | (m_spritebank << 6)),
(UInt32)color,
fx, fy,
sx - 256, sy,
m_palette.target.palette_interface.transpen_mask(m_gfxdecode.target.digfx.gfx(1), (UInt32)color & 0x3f, 0));
}
/* In the Pac Man based games (NOT Pengo) the first two sprites must be offset */
/* one pixel to the left to get a more correct placement */
for (offs = 2 * 2; offs >= 0; offs -= 2)
{
int color;
int sx;
int sy;
byte fx;
byte fy;
if (m_inv_spr != 0)
{
sx = spriteram_2[offs + 1];
sy = 240 - (spriteram_2[offs]);
}
else
{
sx = 272 - spriteram_2[offs + 1];
sy = spriteram_2[offs] - 31;
}
color = (spriteram[offs + 1] & 0x1f) | (m_colortablebank << 5) | (m_palettebank << 6);
fx = (byte)((spriteram[offs] & 1) ^ m_inv_spr);
fy = (byte)((spriteram[offs] & 2) ^ ((m_inv_spr) << 1));
m_gfxdecode.target.digfx.gfx(1).transmask(bitmap, spriteclip,
(UInt32)((spriteram[offs] >> 2) | (m_spritebank << 6)),
(UInt32)color,
fx, fy,
sx, sy + m_xoffsethack,
m_palette.target.palette_interface.transpen_mask(m_gfxdecode.target.digfx.gfx(1), (UInt32)color & 0x3f, 0));
/* also plot the sprite with wraparound (tunnel in Crush Roller) */
m_gfxdecode.target.digfx.gfx(1).transmask(bitmap, spriteclip,
(UInt32)((spriteram[offs] >> 2) | (m_spritebank << 6)),
(UInt32)color,
fx, fy,
sx - 256, sy + m_xoffsethack,
m_palette.target.palette_interface.transpen_mask(m_gfxdecode.target.digfx.gfx(1), (UInt32)color & 0x3f, 0));
}
}
if (m_bgpriority != 0)
{
m_bg_tilemap.draw(screen, bitmap, cliprect, 0, 0);
}
return(0);
}
