// license:BSD-3-Clause // copyright-holders:Phil Stroffolino /* video/namconb1.c */ #include "emu.h" #include "includes/namconb1.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_machbrkr(uint16_t code, int *tile, int *mask ) { /* 00010203 04050607 00010203 04050607 (normal) */ /* 00010718 191a1b07 00010708 090a0b07 (alt bank) */ int bank = nth_byte32( m_tilebank32, (code>>13)+8 ); int mangle = (code&0x1fff) | (bank<<13); *tile = mangle; *mask = mangle; } /* NB2TilemapCB_machbrkr */ void namconb1_state::NB2TilemapCB_outfxies(uint16_t code, int *tile, int *mask ) { /* the pixmap index is mangled, the transparency bitmask index is not */ *tile = bitswap<16>(code, 15, 14, 13, 12, 11, 10, 9, 6, 7, 8, 5, 4, 3, 2, 1, 0); *mask = code; } /* NB2TilemapCB_outfxies */ void namconb1_state::NB2RozCB_machbrkr(uint16_t code, int *tile, int *mask, int which ) { int bank = nth_byte32(&m_rozbank32[which * 8 / 4], (code >> 11) & 0x7); int mangle = (code & 0x7ff) | (bank << 11); *tile = mangle; *mask = mangle; } /* NB2RozCB_machbrkr */ void namconb1_state::NB2RozCB_outfxies(uint16_t code, int *tile, int *mask, int which ) { /* the pixmap index is mangled, the transparency bitmask index is not */ int bank = nth_byte32(&m_rozbank32[which * 8 / 4], (code >> 11) & 0x7); int mangle = (code & 0x7ff) | (bank << 11); *mask = mangle; mangle = bitswap<19>(mangle & 0x7ffff, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 4, 5, 6, 3, 2, 1, 0); *tile = mangle; } /* NB2RozCB_outfxies */ 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++ ) { m_c169roz->draw(screen, bitmap, cliprect, pri); if ((pri & 1) == 0) { m_c123tmap->draw( screen, bitmap, cliprect, pri/2 ); } m_c355spr->draw(screen, bitmap, cliprect, pri ); } } else { for( pri=0; pri<8; pri++ ) { m_c123tmap->draw( screen, bitmap, cliprect, pri ); m_c355spr->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_c116->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<<11); } VIDEO_START_MEMBER(namconb1_state,namconb1) { save_item(NAME(m_tilemap_tile_bank)); } /* namconb1 */ /****************************************************************************************************/ WRITE32_MEMBER(namconb1_state::rozbank32_w) { uint32_t old_data = m_rozbank32[offset]; COMBINE_DATA(&m_rozbank32[offset]); if (m_rozbank32[offset] != old_data) m_c169roz->mark_all_dirty(); } 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_c116->black_pen(), cliprect ); if( memcmp(m_tilemap_tile_bank,m_tilebank32,sizeof(m_tilemap_tile_bank))!=0 ) { m_c123tmap->mark_all_dirty(); 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_machbrkr( int code ) { int bank = nth_byte32( m_spritebank32, (code>>11)&0xf ); code &= 0x7ff; code |= bitswap<6>(bank & 0x5f, 6, 4, 3, 2, 1, 0) << 11; return code; } /* NB2objcode2tile_machbrkr */ int namconb1_state::NB2objcode2tile_outfxies( int code ) { int bank = nth_byte32( m_spritebank32, (code>>11)&0xf ); code &= 0x7ff; code |= bitswap<6>(bank & 0x5f, 6, 4, 3, 1, 2, 0) << 11; return code; } /* NB2objcode2tile_outfxies */ VIDEO_START_MEMBER(namconb1_state,machbrkr) { save_item(NAME(m_tilemap_tile_bank)); } /* machbrkr */ VIDEO_START_MEMBER(namconb1_state,outfxies) { save_item(NAME(m_tilemap_tile_bank)); } /* outfxies */