#include "driver.h" #include "video/konamiic.h" static int layer_colorbase[3],sprite_colorbase,bg_colorbase; static int layerpri[3]; /*************************************************************************** Callbacks for the K052109 ***************************************************************************/ static void tile_callback(int layer,int bank,int *code,int *color,int *flags,int *priority) { *code |= ((*color & 0x03) << 8) | ((*color & 0x10) << 6) | ((*color & 0x0c) << 9) | (bank << 13); *color = layer_colorbase[layer] + ((*color & 0xe0) >> 5); } /*************************************************************************** Callbacks for the K053245 ***************************************************************************/ static void sprite_callback(int *code,int *color,int *priority_mask) { int pri = 0x20 | ((*color & 0x60) >> 2); if (pri <= layerpri[2]) *priority_mask = 0; else if (pri > layerpri[2] && pri <= layerpri[1]) *priority_mask = 0xf0; else if (pri > layerpri[1] && pri <= layerpri[0]) *priority_mask = 0xf0|0xcc; else *priority_mask = 0xf0|0xcc|0xaa; *color = sprite_colorbase + (*color & 0x1f); } /*************************************************************************** Start the video hardware emulation. ***************************************************************************/ VIDEO_START( parodius ) { K053251_vh_start(); K052109_vh_start(machine,REGION_GFX1,NORMAL_PLANE_ORDER,tile_callback); K053245_vh_start(machine,0,REGION_GFX2,NORMAL_PLANE_ORDER,sprite_callback); } /* useful function to sort the three tile layers by priority order */ static void sortlayers(int *layer,int *pri) { #define SWAP(a,b) \ if (pri[a] < pri[b]) \ { \ int t; \ t = pri[a]; pri[a] = pri[b]; pri[b] = t; \ t = layer[a]; layer[a] = layer[b]; layer[b] = t; \ } SWAP(0,1) SWAP(0,2) SWAP(1,2) } VIDEO_UPDATE( parodius ) { int layer[3]; bg_colorbase = K053251_get_palette_index(K053251_CI0); sprite_colorbase = K053251_get_palette_index(K053251_CI1); layer_colorbase[0] = K053251_get_palette_index(K053251_CI2); layer_colorbase[1] = K053251_get_palette_index(K053251_CI4); layer_colorbase[2] = K053251_get_palette_index(K053251_CI3); K052109_tilemap_update(); layer[0] = 0; layerpri[0] = K053251_get_priority(K053251_CI2); layer[1] = 1; layerpri[1] = K053251_get_priority(K053251_CI4); layer[2] = 2; layerpri[2] = K053251_get_priority(K053251_CI3); sortlayers(layer,layerpri); fillbitmap(priority_bitmap,0,cliprect); fillbitmap(bitmap,machine->pens[16 * bg_colorbase],cliprect); tilemap_draw(bitmap,cliprect,K052109_tilemap[layer[0]],0,1); tilemap_draw(bitmap,cliprect,K052109_tilemap[layer[1]],0,2); tilemap_draw(bitmap,cliprect,K052109_tilemap[layer[2]],0,4); K053245_sprites_draw(0,bitmap,cliprect); return 0; }