/* video/namcofl.c */ #include "emu.h" #include "includes/namcoic.h" #include "includes/namcos2.h" #include "includes/namcofl.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. */ #ifdef UNUSED_FUNCTION INLINE UINT16 nth_word32( const UINT32 *source, int which ) { source += which/2; which ^= 1; /* i960 is little-endian */ if( which&1 ) { return (*source)&0xffff; } else { return (*source)>>16; } } #endif /* 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. */ #ifdef UNUSED_FUNCTION INLINE UINT8 nth_byte32( const UINT32 *pSource, int which ) { UINT32 data = pSource[which/4]; which ^= 3; /* i960 is little-endian */ 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 */ #endif static void namcofl_install_palette(running_machine &machine) { int pen, page, dword_offset, byte_offset; UINT32 r,g,b; UINT32 *pSource; /* this is unnecessarily expensive. Better would be to mark palette entries dirty as * they are modified, and only process those that have changed. */ pen = 0; for( page=0; page<4; page++ ) { pSource = &machine.generic.paletteram.u32[page*0x2000/4]; for( dword_offset=0; dword_offset<0x800/4; dword_offset++ ) { r = pSource[dword_offset+0x0000/4]; g = pSource[dword_offset+0x0800/4]; b = pSource[dword_offset+0x1000/4]; for( byte_offset=0; byte_offset<4; byte_offset++ ) { palette_set_color_rgb( machine, pen++, r&0xff, g&0xff, b&0xff); r>>=8; g>>=8; b>>=8; } } } } static void TilemapCB(running_machine &machine, UINT16 code, int *tile, int *mask ) { *tile = code; *mask = code; } SCREEN_UPDATE( namcofl ) { int pri; namcofl_install_palette(screen->machine()); bitmap_fill( bitmap, cliprect , get_black_pen(screen->machine())); for( pri=0; pri<16; pri++ ) { namco_roz_draw( bitmap,cliprect,pri ); if((pri&1)==0) namco_tilemap_draw( bitmap, cliprect, pri>>1 ); namco_obj_draw(screen->machine(), bitmap, cliprect, pri ); } return 0; } // NOTE : The two low bits toggle banks (code + 0x4000) for two // groups of sprites. I am unsure how to differentiate those groups // at this time however. WRITE32_HANDLER(namcofl_spritebank_w) { namcofl_state *state = space->machine().driver_data(); COMBINE_DATA(&state->m_sprbank); } static int FLobjcode2tile( running_machine &machine, int code ) { namcofl_state *state = machine.driver_data(); if ((code & 0x2000) && (state->m_sprbank & 2)) { code += 0x4000; } return code; } VIDEO_START( namcofl ) { namco_tilemap_init( machine, NAMCOFL_TILEGFX, machine.region(NAMCOFL_TILEMASKREGION)->base(), TilemapCB ); namco_obj_init(machine,NAMCOFL_SPRITEGFX,0x0,FLobjcode2tile); namco_roz_init(machine,NAMCOFL_ROTGFX,NAMCOFL_ROTMASKREGION); }