// license:BSD-3-Clause
// copyright-holders:Phil Stroffolino
/* video/namconb1.c */
#include "emu.h"
#include "includes/namconb1.h"
#include "machine/namcoic.h"
/* nth_word32 is a general-purpose utility function, which allows us to
* read from 32-bit aligned memory as if it were an array of 16 bit words.
*/
static inline uint16_t
nth_word32( const uint32_t *source, int which )
{
source += which/2;
if( which&1 )
{
return (*source)&0xffff;
}
else
{
return (*source)>>16;
}
}
/* nth_byte32 is a general-purpose utility function, which allows us to
* read from 32-bit aligned memory as if it were an array of bytes.
*/
static inline uint8_t
nth_byte32( const uint32_t *pSource, int which )
{
uint32_t data = pSource[which/4];
switch( which&3 )
{
case 0: return data>>24;
case 1: return (data>>16)&0xff;
case 2: return (data>>8)&0xff;
default: return data&0xff;
}
} /* nth_byte32 */
void namconb1_state::NB1TilemapCB(uint16_t code, int *tile, int *mask)
{
*tile = code;
*mask = code;
} /* NB1TilemapCB */
void namconb1_state::NB2TilemapCB(uint16_t code, int *tile, int *mask )
{
int mangle;
if( m_gametype == NAMCONB2_MACH_BREAKERS )
{
/* 00010203 04050607 00010203 04050607 (normal) */
/* 00010718 191a1b07 00010708 090a0b07 (alt bank) */
int bank = nth_byte32( m_tilebank32, (code>>13)+8 );
mangle = (code&0x1fff) + bank*0x2000;
*tile = mangle;
*mask = mangle;
}
else
{
/* the pixmap index is mangled, the transparency bitmask index is not */
mangle = code&~(0x140);
if( code&0x100 ) mangle |= 0x040;
if( code&0x040 ) mangle |= 0x100;
*tile = mangle;
*mask = code;
}
} /* NB2TilemapCB */
void namconb1_state::video_update_common(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect, int bROZ )
{
int pri;
if( bROZ )
{
for( pri=0; pri<16; pri++ )
{
c169_roz_draw(screen, bitmap, cliprect, pri);
if( (pri&1)==0 )
{
c123_tilemap_draw( screen, bitmap, cliprect, pri/2 );
}
c355_obj_draw(screen, bitmap, cliprect, pri );
}
}
else
{
for( pri=0; pri<8; pri++ )
{
c123_tilemap_draw( screen, bitmap, cliprect, pri );
c355_obj_draw(screen, bitmap, cliprect, pri );
}
}
} /* video_update_common */
/************************************************************************************************/
uint32_t namconb1_state::screen_update_namconb1(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
/* compute window for custom screen blanking */
rectangle clip;
//004a 016a 0021 0101 0144 0020 (nebulas ray)
clip.min_x = m_c116->get_reg(0) - 0x4a;
clip.max_x = m_c116->get_reg(1) - 0x4a - 1;
clip.min_y = m_c116->get_reg(2) - 0x21;
clip.max_y = m_c116->get_reg(3) - 0x21 - 1;
/* intersect with master clip rectangle */
clip &= cliprect;
bitmap.fill(m_palette->black_pen(), cliprect );
video_update_common( screen, bitmap, clip, 0 );
return 0;
}
int namconb1_state::NB1objcode2tile( int code )
{
int bank = nth_word32( m_spritebank32, code>>11 );
return (code&0x7ff) + bank*0x800;
}
VIDEO_START_MEMBER(namconb1_state,namconb1)
{
c123_tilemap_init(NAMCONB1_TILEGFX, memregion(NAMCONB1_TILEMASKREGION)->base(), namcos2_shared_state::c123_tilemap_delegate(&namconb1_state::NB1TilemapCB, this));
c355_obj_init(NAMCONB1_SPRITEGFX,0x0,namcos2_shared_state::c355_obj_code2tile_delegate(&namconb1_state::NB1objcode2tile, this));
save_item(NAME(m_tilemap_tile_bank));
} /* namconb1 */
/****************************************************************************************************/
uint32_t namconb1_state::screen_update_namconb2(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
/* compute window for custom screen blanking */
rectangle clip;
//004a016a 00210101 01440020
clip.min_x = m_c116->get_reg(0) - 0x4b;
clip.max_x = m_c116->get_reg(1) - 0x4b - 1;
clip.min_y = m_c116->get_reg(2) - 0x21;
clip.max_y = m_c116->get_reg(3) - 0x21 - 1;
/* intersect with master clip rectangle */
clip &= cliprect;
bitmap.fill(m_palette->black_pen(), cliprect );
if( memcmp(m_tilemap_tile_bank,m_tilebank32,sizeof(m_tilemap_tile_bank))!=0 )
{
c123_tilemap_invalidate();
memcpy(m_tilemap_tile_bank,m_tilebank32,sizeof(m_tilemap_tile_bank));
}
video_update_common( screen, bitmap, clip, 1 );
return 0;
}
int namconb1_state::NB2objcode2tile( int code )
{
int bank = nth_byte32( m_spritebank32, (code>>11)&0xf );
code &= 0x7ff;
if( m_gametype == NAMCONB2_MACH_BREAKERS )
{
if( bank&0x01 ) code |= 0x01*0x800;
if( bank&0x02 ) code |= 0x02*0x800;
if( bank&0x04 ) code |= 0x04*0x800;
if( bank&0x08 ) code |= 0x08*0x800;
if( bank&0x10 ) code |= 0x10*0x800;
if( bank&0x40 ) code |= 0x20*0x800;
}
else
{
if( bank&0x01 ) code |= 0x01*0x800;
if( bank&0x02 ) code |= 0x04*0x800;
if( bank&0x04 ) code |= 0x02*0x800;
if( bank&0x08 ) code |= 0x08*0x800;
if( bank&0x10 ) code |= 0x10*0x800;
if( bank&0x40 ) code |= 0x20*0x800;
}
return code;
} /* NB2objcode2tile */
VIDEO_START_MEMBER(namconb1_state,namconb2)
{
c123_tilemap_init(NAMCONB1_TILEGFX, memregion(NAMCONB1_TILEMASKREGION)->base(), namcos2_shared_state::c123_tilemap_delegate(&namconb1_state::NB2TilemapCB, this));
c355_obj_init(NAMCONB1_SPRITEGFX,0x0,namcos2_shared_state::c355_obj_code2tile_delegate(&namconb1_state::NB2objcode2tile, this));
c169_roz_init(NAMCONB1_ROTGFX,NAMCONB1_ROTMASKREGION);
save_item(NAME(m_tilemap_tile_bank));
} /* namconb2_vh_start */