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/ AmigActive 10 / AACD 10.iso / AACD / Games / MAME / src / vidhrdw / surpratk.c < prev    next >
C/C++ Source or Header  |  2000-03-18  |  3KB  |  119 lines
  1. #include "driver.h"
  2. #include "vidhrdw/konamiic.h"
  3.  
  4. static int layer_colorbase[3],sprite_colorbase,bg_colorbase;
  5. static int layerpri[3];
  6.  
  7.  
  8. /***************************************************************************
  9.  
  10.   Callbacks for the K052109
  11.  
  12. ***************************************************************************/
  13.  
  14. static void tile_callback(int layer,int bank,int *code,int *color)
  15. {
  16.     tile_info.flags = (*color & 0x80) ? TILE_FLIPX : 0;
  17.     *code |= ((*color & 0x03) << 8) | ((*color & 0x10) << 6) | ((*color & 0x0c) << 9) | (bank << 13);
  18.     *color = layer_colorbase[layer] + ((*color & 0x60) >> 5);
  19. }
  20.  
  21. /***************************************************************************
  22.  
  23.   Callbacks for the K053245
  24.  
  25. ***************************************************************************/
  26.  
  27. static void sprite_callback(int *code,int *color,int *priority_mask)
  28. {
  29.     int pri = 0x20 | ((*color & 0x60) >> 2);
  30.     if (pri <= layerpri[2])                                *priority_mask = 0;
  31.     else if (pri > layerpri[2] && pri <= layerpri[1])    *priority_mask = 0xf0;
  32.     else if (pri > layerpri[1] && pri <= layerpri[0])    *priority_mask = 0xf0|0xcc;
  33.     else                                                 *priority_mask = 0xf0|0xcc|0xaa;
  34.  
  35.     *color = sprite_colorbase + (*color & 0x1f);
  36. }
  37.  
  38.  
  39. /***************************************************************************
  40.  
  41.     Start the video hardware emulation.
  42.  
  43. ***************************************************************************/
  44.  
  45. int surpratk_vh_start( void )
  46. {
  47.     if (K052109_vh_start(REGION_GFX1,NORMAL_PLANE_ORDER,tile_callback))
  48.     {
  49.         return 1;
  50.     }
  51.     if (K053245_vh_start(REGION_GFX2,NORMAL_PLANE_ORDER,sprite_callback))
  52.     {
  53.         K052109_vh_stop();
  54.         return 1;
  55.     }
  56.  
  57.     return 0;
  58. }
  59.  
  60. void surpratk_vh_stop( void )
  61. {
  62.     K052109_vh_stop();
  63.     K053245_vh_stop();
  64. }
  65.  
  66. /* useful function to sort the three tile layers by priority order */
  67. static void sortlayers(int *layer,int *pri)
  68. {
  69. #define SWAP(a,b) \
  70.     if (pri[a] < pri[b]) \
  71.     { \
  72.         int t; \
  73.         t = pri[a]; pri[a] = pri[b]; pri[b] = t; \
  74.         t = layer[a]; layer[a] = layer[b]; layer[b] = t; \
  75.     }
  76.  
  77.     SWAP(0,1)
  78.     SWAP(0,2)
  79.     SWAP(1,2)
  80. }
  81.  
  82. void surpratk_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh)
  83. {
  84.     int layer[3];
  85.  
  86.  
  87.     bg_colorbase       = K053251_get_palette_index(K053251_CI0);
  88.     sprite_colorbase   = K053251_get_palette_index(K053251_CI1);
  89.     layer_colorbase[0] = K053251_get_palette_index(K053251_CI2);
  90.     layer_colorbase[1] = K053251_get_palette_index(K053251_CI4);
  91.     layer_colorbase[2] = K053251_get_palette_index(K053251_CI3);
  92.  
  93.     K052109_tilemap_update();
  94.  
  95.     palette_init_used_colors();
  96.     K053245_mark_sprites_colors();
  97.     if (palette_recalc())
  98.         tilemap_mark_all_pixels_dirty(ALL_TILEMAPS);
  99.  
  100.     tilemap_render(ALL_TILEMAPS);
  101.  
  102.     layer[0] = 0;
  103.     layerpri[0] = K053251_get_priority(K053251_CI2);
  104.     layer[1] = 1;
  105.     layerpri[1] = K053251_get_priority(K053251_CI4);
  106.     layer[2] = 2;
  107.     layerpri[2] = K053251_get_priority(K053251_CI3);
  108.  
  109.     sortlayers(layer,layerpri);
  110.  
  111.     fillbitmap(priority_bitmap,0,NULL);
  112.     fillbitmap(bitmap,Machine->pens[16 * bg_colorbase],&Machine->drv->visible_area);
  113.     K052109_tilemap_draw(bitmap,layer[0],1<<16);
  114.     K052109_tilemap_draw(bitmap,layer[1],2<<16);
  115.     K052109_tilemap_draw(bitmap,layer[2],4<<16);
  116.  
  117.     K053245_sprites_draw(bitmap);
  118. }
  119.