/*************************************************************************** vidhrdw.c Functions to emulate the video hardware of the machine. ***************************************************************************/ #include "driver.h" #include "vidhrdw/generic.h" #define VIDEO_RAM_SIZE 0x400 void superpac_draw_sprite(struct osd_bitmap *dest,unsigned int code,unsigned int color, int flipx,int flipy,int sx,int sy) { drawgfx(dest,Machine->gfx[1],code,color,flipx,flipy,sx,sy,&Machine->drv->visible_area, TRANSPARENCY_PEN,0); } /*************************************************************************** Draw the game screen in the given osd_bitmap. Do NOT call osd_update_display() from this function, it will be called by the main emulation engine. ***************************************************************************/ void superpac_vh_screenrefresh(struct osd_bitmap *bitmap) { int i,offs; /* for every character in the Video RAM, check if it has been modified */ /* since last time and update it accordingly. */ for (offs = 0;offs < VIDEO_RAM_SIZE;offs++) { if (dirtybuffer[offs]) { int sx,sy,mx,my; dirtybuffer[offs] = 0; /* Even if Pengo's screen is 28x36, the memory layout is 32x32. We therefore */ /* have to convert the memory coordinates into screen coordinates. */ /* Note that 32*32 = 1024, while 28*36 = 1008: therefore 16 bytes of Video RAM */ /* don't map to a screen position. We don't check that here, however: range */ /* checking is performed by drawgfx(). */ mx = offs / 32; my = offs % 32; if (mx <= 1) { sx = 29 - my; sy = mx + 34; } else if (mx >= 30) { sx = 29 - my; sy = mx - 30; } else { sx = 29 - mx; sy = my + 2; } drawgfx(tmpbitmap,Machine->gfx[0], videoram[offs], colorram[offs], 0,0,8*sx,8*sy, &Machine->drv->visible_area,TRANSPARENCY_NONE,0); } } /* copy the character mapped graphics */ copybitmap(bitmap,tmpbitmap,0,0,0,0,&Machine->drv->visible_area,TRANSPARENCY_NONE,0); /* Draw the sprites. */ for (i = 0;i < 64;i++) { /* is it on? */ if ((spriteram_3[2*i+1] & 2) == 0) { int sprite = spriteram[2*i]; int color = spriteram[2*i+1]; int x = spriteram_2[2*i]-17; int y = (spriteram_2[2*i+1]-40) + 0x100*(spriteram_3[2*i+1] & 1); int flipx = spriteram_3[2*i] & 2; int flipy = spriteram_3[2*i] & 1; if (color > 37) color -= 32; /* is it on-screen? */ if (x > -16) { switch (spriteram_3[2*i] & 0x0c) { case 0: /* normal size */ superpac_draw_sprite(bitmap,sprite,color,flipx,flipy,x,y); break; case 4: /* 2x vertical */ if (!flipy) { superpac_draw_sprite(bitmap,sprite,color,flipx,flipy,x,y); superpac_draw_sprite(bitmap,1+sprite,color,flipx,flipy,x,16+y); } else { superpac_draw_sprite(bitmap,sprite,color,flipx,flipy,x,16+y); superpac_draw_sprite(bitmap,1+sprite,color,flipx,flipy,x,y); } break; case 8: /* 2x horizontal */ if (!flipx) { superpac_draw_sprite(bitmap,2+sprite,color,flipx,flipy,x,y); superpac_draw_sprite(bitmap,sprite,color,flipx,flipy,16+x,y); } else { superpac_draw_sprite(bitmap,sprite,color,flipx,flipy,x,y); superpac_draw_sprite(bitmap,2+sprite,color,flipx,flipy,16+x,y); } break; case 12: /* 2x both ways */ if (!flipy && !flipx) { superpac_draw_sprite(bitmap,2+sprite,color,flipx,flipy,x,y); superpac_draw_sprite(bitmap,3+sprite,color,flipx,flipy,x,16+y); superpac_draw_sprite(bitmap,sprite,color,flipx,flipy,16+x,y); superpac_draw_sprite(bitmap,1+sprite,color,flipx,flipy,16+x,16+y); } else if (flipy && flipx) { superpac_draw_sprite(bitmap,1+sprite,color,flipx,flipy,x,y); superpac_draw_sprite(bitmap,sprite,color,flipx,flipy,x,16+y); superpac_draw_sprite(bitmap,3+sprite,color,flipx,flipy,16+x,y); superpac_draw_sprite(bitmap,2+sprite,color,flipx,flipy,16+x,16+y); } else if (flipx) { superpac_draw_sprite(bitmap,sprite,color,flipx,flipy,x,y); superpac_draw_sprite(bitmap,1+sprite,color,flipx,flipy,x,16+y); superpac_draw_sprite(bitmap,2+sprite,color,flipx,flipy,16+x,y); superpac_draw_sprite(bitmap,3+sprite,color,flipx,flipy,16+x,16+y); } else /* flipy */ { superpac_draw_sprite(bitmap,3+sprite,color,flipx,flipy,x,y); superpac_draw_sprite(bitmap,2+sprite,color,flipx,flipy,x,16+y); superpac_draw_sprite(bitmap,1+sprite,color,flipx,flipy,16+x,y); superpac_draw_sprite(bitmap,sprite,color,flipx,flipy,16+x,16+y); } break; } } } } #if 0 /* Draw the sprites. Note that it is important to draw them exactly in this */ /* order, to have the correct priorities. */ for (i = 0;i < 56; i++) { if (spriteram[32*i+1]) drawgfx(bitmap,Machine->gfx[gfx_bank ? 3 : 1], /*charnum*/ spriteram[32*i + 1], spriteram[32*i + 2] + 32, /*hflip*/ spriteram[32*i] & 0x02, /*vflip*/ spriteram[32*i] & 0x01, /*xpos*/ 231 - spriteram[32*i + 3], /*ypos*/ 8 + spriteram[32*i + 4], &spritevisiblearea,TRANSPARENCY_COLOR,Machine->background_pen); } /* Draw the pacman sprite(s). */ for( i=0; i<4; i++) { /* ugly hack to handle big pacman sprite */ if( spriteram_2[32*i] & 0x04 ) { unsigned char off[4] = { 0,0,0,0 }; /* order of chars depends on hflip/vflip */ switch( spriteram_2[32*i] & 0x03 ) { case 0x00: off[0] = 2; off[1] = 3; off[2] = 0; off[3] = 1; break; case 0x01: off[0] = 3; off[1] = 2; off[2] = 1; off[3] = 0; break; case 0x02: off[0] = 0; off[1] = 1; off[2] = 2; off[3] = 3; break; } /* 0 norm -8 +16, -8 + 0 A char + 2 1 norm -8 +16, -8 + 16 B char + 3 2 norm -8 +0, -8 + 0 C char + 0 3 norm -8 +0, -8 + 16 D char + 1 0 hflip -8 +0, -8 + 0 C char + 0 1 hflip -8 +0, -8 + 16 D char + 1 2 hflip -8 +16, -8 + 0 A char + 2 3 hflip -8 +16, -8 + 16 B char + 3 0 vflip -8 +16, -8 + 16 B char + 3 1 vflip -8 +16, -8 + 0 A char + 2 2 vflip -8 +0, -8 + 16 D char + 1 3 vflip -8 + 0, -8 + 0 C char + 0 */ drawgfx(bitmap,Machine->gfx[gfx_bank ? 3 : 1], /*charnum*/ spriteram_2[32*i + 1]+off[0], /* spriteram[2*i] >> 2, */ /*color*/ spriteram_2[32*i + 2], /* spriteram[2*i + 1], */ /*hflip*/ spriteram_2[32*i] & 0x02, /* spriteram[2*i] & 2, */ /*vflip*/ spriteram_2[32*i] & 0x01, /* spriteram[2*i] & 1, */ /*xpos*/ 231 - 8 - spriteram_2[32*i + 3], /* 239 - spriteram_2[2*i], */ /*ypos*/ 8 - 8 + spriteram_2[32*i + 4], /* 272 - spriteram_2[2*i + 1], */ &spritevisiblearea,TRANSPARENCY_COLOR,Machine->background_pen); drawgfx(bitmap,Machine->gfx[gfx_bank ? 3 : 1], /*charnum*/ spriteram_2[32*i + 1]+off[1], /*color*/ spriteram_2[32*i + 2], /*hflip*/ spriteram_2[32*i] & 0x02, /*vflip*/ spriteram_2[32*i] & 0x01, /*xpos*/ 231 - 8 - spriteram_2[32*i + 3], /*ypos*/ 8 + 8 + spriteram_2[32*i + 4], &spritevisiblearea,TRANSPARENCY_COLOR,Machine->background_pen); drawgfx(bitmap,Machine->gfx[gfx_bank ? 3 : 1], /*charnum*/ spriteram_2[32*i + 1]+off[2], /*color*/ spriteram_2[32*i + 2], /*hflip*/ spriteram_2[32*i] & 0x02, /*vflip*/ spriteram_2[32*i] & 0x01, /*xpos*/ 8 + 231 - spriteram_2[32*i + 3], /*ypos*/ 8 - 8 + spriteram_2[32*i + 4], &spritevisiblearea,TRANSPARENCY_COLOR,Machine->background_pen); drawgfx(bitmap,Machine->gfx[gfx_bank ? 3 : 1], /*charnum*/ spriteram_2[32*i + 1]+off[3], /*color*/ spriteram_2[32*i + 2], /*hflip*/ spriteram_2[32*i] & 0x02, /*vflip*/ spriteram_2[32*i] & 0x01, /*xpos*/ 8 + 231 - spriteram_2[32*i + 3], /*ypos*/ 8 + 8 + spriteram_2[32*i + 4], &spritevisiblearea,TRANSPARENCY_COLOR,Machine->background_pen); } else { /* another ugly hack (sigh...) */ unsigned char color; color = spriteram_2[32*i + 2]; if( color<0x20 ) color += 0x20; drawgfx(bitmap,Machine->gfx[gfx_bank ? 3 : 1], /*charnum*/ spriteram_2[32*i + 1], /* spriteram[2*i] >> 2, */ /*color*/ color /*spriteram_2[32*i + 2]*/, /* spriteram[2*i + 1], */ /*hflip*/ spriteram_2[32*i] & 0x02, /* spriteram[2*i] & 2, */ /*vflip*/ spriteram_2[32*i] & 0x01, /* spriteram[2*i] & 1, */ /*xpos*/ 231 - spriteram_2[32*i + 3], /* 239 - spriteram_2[2*i], */ /*ypos*/ 8 + spriteram_2[32*i + 4], /* 272 - spriteram_2[2*i + 1], */ &spritevisiblearea,TRANSPARENCY_COLOR,Machine->background_pen); } } #endif }