/*************************************************************************** video.c ***************************************************************************/ #include "driver.h" #include UINT16 *nemesis_videoram1b; UINT16 *nemesis_videoram2b; UINT16 *nemesis_videoram1f; UINT16 *nemesis_videoram2f; UINT16 *nemesis_characterram; size_t nemesis_characterram_size; UINT16 *nemesis_xscroll1,*nemesis_xscroll2,*nemesis_yscroll; UINT16 *nemesis_yscroll1,*nemesis_yscroll2; static int spriteram_words; static int tilemap_flip; static int flipscreen; static tilemap *background, *foreground; static UINT8 *blank_characterdata; /* pseudo character */ /* gfxram dirty flags */ /* we should be able to draw sprite gfx directly without caching to GfxElements */ static UINT8 *sprite_dirty[8]; static const struct { UINT8 width; UINT8 height; UINT8 char_type; } sprite_data[8] = { { 32, 32, 4 }, { 16, 32, 5 }, { 32, 16, 2 }, { 64, 64, 7 }, { 8, 8, 0 }, { 16, 8, 6 }, { 8, 16, 3 }, { 16, 16, 1 } }; static TILE_GET_INFO( get_bg_tile_info ) { int code,color,flags; code = nemesis_videoram1f[tile_index]; color = nemesis_videoram2f[tile_index]; flags = 0; if ( color & 0x80) flags |= TILE_FLIPX; if ( code & 0x0800) flags |= TILE_FLIPY; if ((~code & 0x2000) || ((code & 0xc000) == 0x4000)) flags |= TILE_FORCE_LAYER0; if (code & 0xf800) { SET_TILE_INFO( 0, code&0x7ff, color&0x7f, flags ); } else { SET_TILE_INFO( 0, 0x800, 0x00, 0 ); } tileinfo->category = (code & 0x1000)>>12; } static TILE_GET_INFO( get_fg_tile_info ) { int code,color,flags; code = nemesis_videoram1b[tile_index]; color = nemesis_videoram2b[tile_index]; flags = 0; if ( color & 0x80) flags |= TILE_FLIPX; if ( code & 0x0800) flags |= TILE_FLIPY; if ((~code & 0x2000) || ((code & 0xc000) == 0x4000)) flags |= TILE_FORCE_LAYER0; if (code & 0xf800) { SET_TILE_INFO( 0, code&0x7ff, color&0x7f, flags ); } else { SET_TILE_INFO( 0, 0x800, 0x00, 0 ); } tileinfo->category = (code & 0x1000)>>12; } WRITE16_HANDLER( nemesis_gfx_flipx_w ) { if (ACCESSING_LSB) { flipscreen = data & 0x01; if (flipscreen) tilemap_flip |= TILEMAP_FLIPX; else tilemap_flip &= ~TILEMAP_FLIPX; tilemap_set_flip(ALL_TILEMAPS, tilemap_flip); } else { if (data & 0x100) { cpunum_set_input_line_and_vector(1, 0, HOLD_LINE, 0xff); } } } WRITE16_HANDLER( nemesis_gfx_flipy_w ) { if (ACCESSING_LSB) { if (data & 0x01) tilemap_flip |= TILEMAP_FLIPY; else tilemap_flip &= ~TILEMAP_FLIPY; tilemap_set_flip(ALL_TILEMAPS, tilemap_flip); } } WRITE16_HANDLER( nemesis_palette_word_w ) { int r,g,b,bit1,bit2,bit3,bit4,bit5; COMBINE_DATA(paletteram16 + offset); data = paletteram16[offset]; /* Mish, 30/11/99 - Schematics show the resistor values are: 300 Ohms 620 Ohms 1200 Ohms 2400 Ohms 4700 Ohms So the correct weights per bit are 8, 17, 33, 67, 130 */ #define MULTIPLIER 8 * bit1 + 17 * bit2 + 33 * bit3 + 67 * bit4 + 130 * bit5 bit1=(data >> 0)&1; bit2=(data >> 1)&1; bit3=(data >> 2)&1; bit4=(data >> 3)&1; bit5=(data >> 4)&1; r = MULTIPLIER; bit1=(data >> 5)&1; bit2=(data >> 6)&1; bit3=(data >> 7)&1; bit4=(data >> 8)&1; bit5=(data >> 9)&1; g = MULTIPLIER; bit1=(data >> 10)&1; bit2=(data >> 11)&1; bit3=(data >> 12)&1; bit4=(data >> 13)&1; bit5=(data >> 14)&1; b = MULTIPLIER; palette_set_color(Machine,offset,MAKE_RGB(r,g,b)); } WRITE16_HANDLER( salamander_palette_word_w ) { COMBINE_DATA(paletteram16 + offset); offset &= ~1; data = ((paletteram16[offset] << 8) & 0xff00) | (paletteram16[offset+1] & 0xff); palette_set_color_rgb(Machine,offset / 2,pal5bit(data >> 0),pal5bit(data >> 5),pal5bit(data >> 10)); } WRITE16_HANDLER( nemesis_videoram1b_word_w ) { COMBINE_DATA(nemesis_videoram1b + offset); tilemap_mark_tile_dirty( foreground,offset ); } WRITE16_HANDLER( nemesis_videoram1f_word_w ) { COMBINE_DATA(nemesis_videoram1f + offset); tilemap_mark_tile_dirty( background,offset ); } WRITE16_HANDLER( nemesis_videoram2b_word_w ) { COMBINE_DATA(nemesis_videoram2b + offset); tilemap_mark_tile_dirty( foreground,offset ); } WRITE16_HANDLER( nemesis_videoram2f_word_w ) { COMBINE_DATA(nemesis_videoram2f + offset); tilemap_mark_tile_dirty( background,offset ); } /* we have to straighten out the 16-bit word into bytes for gfxdecode() to work */ WRITE16_HANDLER( nemesis_characterram_word_w ) { UINT16 oldword = nemesis_characterram[offset]; COMBINE_DATA(nemesis_characterram + offset); data = nemesis_characterram[offset]; if (oldword != data) { int i; for (i=0; i<8; i++) { int w = sprite_data[i].width; int h = sprite_data[i].height; sprite_dirty[i][offset * 4 / (w * h)] = 1; } } } /* claim a palette dirty array */ VIDEO_START( nemesis ) { int i; spriteram_words = spriteram_size / 2; background = tilemap_create( get_bg_tile_info, tilemap_scan_rows, TILEMAP_TYPE_PEN, 8,8, 64,32 ); foreground = tilemap_create( get_fg_tile_info, tilemap_scan_rows, TILEMAP_TYPE_PEN, 8,8, 64,32 ); tilemap_set_transparent_pen( background, 0 ); tilemap_set_transparent_pen( foreground, 0 ); tilemap_set_scroll_rows( background, 256 ); tilemap_set_scroll_rows( foreground, 256 ); for (i=0; i<8; i++) { int w = sprite_data[i].width; int h = sprite_data[i].height; int size = 0x20000 / (w * h); sprite_dirty[i] = auto_malloc(size); memset(sprite_dirty[i], 1, size); } memset(nemesis_characterram,0,nemesis_characterram_size); blank_characterdata = auto_malloc(32*8/8*(2048+1)); memset(blank_characterdata,0x00,32*8/8*(2048+1)); decodechar(machine->gfx[0],0x800,(UINT8 *)blank_characterdata, machine->drv->gfxdecodeinfo[0].gfxlayout); flipscreen = 0; tilemap_flip = 0; } static void draw_sprites(running_machine *machine, mame_bitmap *bitmap, const rectangle *cliprect) { /* * 16 bytes per sprite, in memory from 56000-56fff * * byte 0 : relative priority. * byte 2 : size (?) value #E0 means not used., bit 0x01 is flipx 0xc0 is upper 2 bits of zoom. 0x38 is size. * byte 4 : zoom = 0xff * byte 6 : low bits sprite code. * byte 8 : color + hi bits sprite code., bit 0x20 is flipy bit. bit 0x01 is high bit of X pos. * byte A : X position. * byte C : Y position. * byte E : not used. */ int adress; /* start of sprite in spriteram */ int sx; /* sprite X-pos */ int sy; /* sprite Y-pos */ int code; /* start of sprite in obj RAM */ int color; /* color of the sprite */ int flipx,flipy; int zoom; int char_type; int priority; int size; int w,h; int idx; for (priority=256-1; priority>=0; priority--) { for (adress = spriteram_words-8; adress >= 0; adress -= 8) { if((spriteram16[adress] & 0xff)!=priority) continue; zoom = spriteram16[adress+2] & 0xff; if (!(spriteram16[adress+2] & 0xff00) && ((spriteram16[adress+3] & 0xff00) != 0xff00)) code = spriteram16[adress+3] + ((spriteram16[adress+4] & 0xc0) << 2); else code = (spriteram16[adress+3] & 0xff) + ((spriteram16[adress+4] & 0xc0) << 2); if (zoom != 0xFF || code!=0) { size=spriteram16[adress+1]; zoom+=(size&0xc0)<<2; sx = spriteram16[adress+5]&0xff; sy = spriteram16[adress+6]&0xff; if(spriteram16[adress+4]&1) sx-=0x100; /* fixes left side clip */ color = (spriteram16[adress+4] & 0x1e) >> 1; flipx = spriteram16[adress+1] & 0x01; flipy = spriteram16[adress+4] & 0x20; idx = (size >> 3) & 7; w = sprite_data[idx].width; h = sprite_data[idx].height; code = code * 8 * 16 / (w * h); char_type = sprite_data[idx].char_type; if( zoom ) { zoom = ((1<<16)*0x80/zoom) + 0x02ab; if (flipscreen) { sx = 256 - ((zoom * w) >> 16) - sx; sy = 256 - ((zoom * h) >> 16) - sy; flipx = !flipx; flipy = !flipy; } pdrawgfxzoom(bitmap,machine->gfx[char_type], code, color, flipx,flipy, sx,sy, cliprect,TRANSPARENCY_PEN,0, zoom,zoom, 0xfff0 ); } } /* if sprite */ } /* for loop */ } /* priority */ } /******************************************************************************/ static void update_gfx(running_machine *machine) { int offs,code; int bAnyDirty; bAnyDirty = 0; for (offs = spriteram_words - 1;offs >= 0;offs --) { if (sprite_dirty[4][offs]) { decodechar(machine->gfx[0],offs,(UINT8 *)nemesis_characterram, machine->drv->gfxdecodeinfo[0].gfxlayout); bAnyDirty = 1; sprite_dirty[4][offs] = 0; } } if( bAnyDirty ) { tilemap_mark_all_tiles_dirty( background ); tilemap_mark_all_tiles_dirty( foreground ); } for (offs = 0;offs < spriteram_words;offs += 8) { int char_type; int zoom; zoom = spriteram16[offs+2] & 0xff; if (!(spriteram16[offs+2] & 0xff00) && ((spriteram16[offs+3] & 0xff00) != 0xff00)) code = spriteram16[offs+3] + ((spriteram16[offs+4] & 0xc0) << 2); else code = (spriteram16[offs+3] & 0xff) + ((spriteram16[offs+4] & 0xc0) << 2); if (zoom != 0xFF || code!=0) { int size = spriteram16[offs+1]; int idx = (size >> 3) & 7; int w, h; w = sprite_data[idx].width; h = sprite_data[idx].height; code = code * 8 * 16 / (w * h); char_type = sprite_data[idx].char_type; if (sprite_dirty[idx][code] == 1) { decodechar(machine->gfx[char_type],code,(UINT8 *)nemesis_characterram, machine->drv->gfxdecodeinfo[char_type].gfxlayout); sprite_dirty[idx][code] = 0; } } } } /******************************************************************************/ VIDEO_UPDATE( nemesis ) { int offs; update_gfx(machine); fillbitmap(priority_bitmap,0,cliprect); fillbitmap(bitmap,machine->pens[0],cliprect); tilemap_set_scrolly( background, 0, (nemesis_yscroll[0x180] & 0xff) ); for (offs = 0;offs < 256;offs++) { tilemap_set_scrollx( background, offs, (nemesis_xscroll2[offs] & 0xff) + ((nemesis_xscroll2[0x100 + offs] & 0x01) << 8) - (flipscreen ? 0x107 : 0) ); tilemap_set_scrollx( foreground, offs, (nemesis_xscroll1[offs] & 0xff) + ((nemesis_xscroll1[0x100 + offs] & 0x01) << 8) - (flipscreen ? 0x107 : 0) ); } tilemap_draw(bitmap,cliprect,background,0,1); tilemap_draw(bitmap,cliprect,foreground,0,2); tilemap_draw(bitmap,cliprect,background,1,4); tilemap_draw(bitmap,cliprect,foreground,1,8); draw_sprites(machine,bitmap,cliprect); return 0; } VIDEO_UPDATE( salamand ) { int offs; rectangle clip; update_gfx(machine); fillbitmap(priority_bitmap,0,cliprect); fillbitmap(bitmap,machine->pens[0],cliprect); clip.min_x = 0; clip.max_x = 255; tilemap_set_scroll_cols( background, 64 ); tilemap_set_scroll_cols( foreground, 64 ); tilemap_set_scroll_rows( background, 1 ); tilemap_set_scroll_rows( foreground, 1 ); for (offs = 0; offs < 64; offs++) { tilemap_set_scrolly( background, offs, nemesis_yscroll1[offs] ); tilemap_set_scrolly( foreground, offs, nemesis_yscroll2[offs] ); } for (offs = cliprect->min_y; offs <= cliprect->max_y; offs++) { clip.min_y = offs; clip.max_y = offs; tilemap_set_scrollx( background, 0, ((nemesis_xscroll2[offs] & 0xff) + ((nemesis_xscroll2[0x100 + offs] & 1) << 8)) ); tilemap_set_scrollx( foreground, 0, ((nemesis_xscroll1[offs] & 0xff) + ((nemesis_xscroll1[0x100 + offs] & 1) << 8)) ); tilemap_draw(bitmap,&clip,foreground,0,1); tilemap_draw(bitmap,&clip,background,0,2); tilemap_draw(bitmap,&clip,foreground,1,4); tilemap_draw(bitmap,&clip,background,1,8); } draw_sprites(machine,bitmap,cliprect); return 0; }