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  1. #include "std.h"
  2.  
  3. #include "emul.h"
  4. #include "vars.h"
  5. #include "draw.h"
  6. #include "dxr_atmf.h"
  7. #include "dxr_atm0.h"
  8.  
  9. static const int ega0_ofs = -4*int(PAGE);
  10. static const int ega1_ofs = 0;
  11. static const int ega2_ofs = -4*int(PAGE)+0x2000;
  12. static const int ega3_ofs = 0x2000;
  13.  
  14. static void line_atm0_8(unsigned char *dst, unsigned char *src, unsigned *tab, int src_offset)
  15. {
  16.     u8 *d = (u8 *)dst;
  17.     for (unsigned x = 0; x < 320; x += 8, ++src_offset)
  18.     {
  19.         src_offset &= 0x1FFF;
  20.         d[x+0] = u8(tab[src[ega0_ofs + src_offset]]);
  21.         d[x+1] = u8(tab[src[ega0_ofs + src_offset]] >> 16);
  22.         d[x+2] = u8(tab[src[ega1_ofs + src_offset]]);
  23.         d[x+3] = u8(tab[src[ega1_ofs + src_offset]] >> 16);
  24.         d[x+4] = u8(tab[src[ega2_ofs + src_offset]]);
  25.         d[x+5] = u8(tab[src[ega2_ofs + src_offset]] >> 16);
  26.         d[x+6] = u8(tab[src[ega3_ofs + src_offset]]);
  27.         d[x+7] = u8(tab[src[ega3_ofs + src_offset]] >> 16);
  28.     }
  29. }
  30.  
  31. static void line_atm0_8d(unsigned char *dst, unsigned char *src, unsigned *tab, int src_offset)
  32. {
  33.     u32 *d = (u32 *)dst;
  34.     for (unsigned x = 0; x < 640/4; x += 4, ++src_offset)
  35.     {
  36.         src_offset &= 0x1FFF;
  37.         d[x+0] = tab[src[ega0_ofs + src_offset]];
  38.         d[x+1] = tab[src[ega1_ofs + src_offset]];
  39.         d[x+2] = tab[src[ega2_ofs + src_offset]];
  40.         d[x+3] = tab[src[ega3_ofs + src_offset]];
  41.     }
  42. }
  43.  
  44. static void line_atm0_16(unsigned char *dst, unsigned char *src, unsigned *tab, int src_offset)
  45. {
  46.     u16 *d = (u16 *)dst;
  47.     for (unsigned x = 0; x < 320; x += 8, ++src_offset)
  48.     {
  49.         src_offset &= 0x1FFF;
  50.         d[x+0] = u16(tab[0+2*src[ega0_ofs + src_offset]]);
  51.         d[x+1] = u16(tab[1+2*src[ega0_ofs + src_offset]]);
  52.         d[x+2] = u16(tab[0+2*src[ega1_ofs + src_offset]]);
  53.         d[x+3] = u16(tab[1+2*src[ega1_ofs + src_offset]]);
  54.         d[x+4] = u16(tab[0+2*src[ega2_ofs + src_offset]]);
  55.         d[x+5] = u16(tab[1+2*src[ega2_ofs + src_offset]]);
  56.         d[x+6] = u16(tab[0+2*src[ega3_ofs + src_offset]]);
  57.         d[x+7] = u16(tab[1+2*src[ega3_ofs + src_offset]]);
  58.     }
  59. }
  60.  
  61. static void line_atm0_16d(unsigned char *dst, unsigned char *src, unsigned *tab, int src_offset)
  62. {
  63.     u32 *d = (u32 *)dst;
  64.     for (unsigned x = 0; x < 640/2; x += 8, ++src_offset)
  65.     {
  66.         src_offset &= 0x1FFF;
  67.         d[x+0] = tab[0+2*src[ega0_ofs + src_offset]];
  68.         d[x+1] = tab[1+2*src[ega0_ofs + src_offset]];
  69.         d[x+2] = tab[0+2*src[ega1_ofs + src_offset]];
  70.         d[x+3] = tab[1+2*src[ega1_ofs + src_offset]];
  71.         d[x+4] = tab[0+2*src[ega2_ofs + src_offset]];
  72.         d[x+5] = tab[1+2*src[ega2_ofs + src_offset]];
  73.         d[x+6] = tab[0+2*src[ega3_ofs + src_offset]];
  74.         d[x+7] = tab[1+2*src[ega3_ofs + src_offset]];
  75.     }
  76. }
  77.  
  78. static void line_atm0_32(unsigned char *dst, unsigned char *src, unsigned *tab, int src_offset)
  79. {
  80.     u32 *d = (u32 *)dst;
  81.     for (unsigned x = 0; x < 320; x += 8, ++src_offset)
  82.     {
  83.         src_offset &= 0x1FFF;
  84.         d[x+0] = tab[0+2*src[ega0_ofs + src_offset]];
  85.         d[x+1] = tab[1+2*src[ega0_ofs + src_offset]];
  86.         d[x+2] = tab[0+2*src[ega1_ofs + src_offset]];
  87.         d[x+3] = tab[1+2*src[ega1_ofs + src_offset]];
  88.         d[x+4] = tab[0+2*src[ega2_ofs + src_offset]];
  89.         d[x+5] = tab[1+2*src[ega2_ofs + src_offset]];
  90.         d[x+6] = tab[0+2*src[ega3_ofs + src_offset]];
  91.         d[x+7] = tab[1+2*src[ega3_ofs + src_offset]];
  92.     }
  93. }
  94.  
  95. static void line_atm0_32d(unsigned char *dst, unsigned char *src, unsigned *tab, int src_offset)
  96. {
  97.     u32 *d = (u32 *)dst;
  98.     for (unsigned x = 0; x < 640; x += 16, ++src_offset)
  99.     {
  100.         src_offset &= 0x1FFF;
  101.         d[x+0]  = d[x+1]  = tab[0+2*src[ega0_ofs + src_offset]];
  102.         d[x+2]  = d[x+3]  = tab[1+2*src[ega0_ofs + src_offset]];
  103.         d[x+4]  = d[x+5]  = tab[0+2*src[ega1_ofs + src_offset]];
  104.         d[x+6]  = d[x+7]  = tab[1+2*src[ega1_ofs + src_offset]];
  105.         d[x+8]  = d[x+9]  = tab[0+2*src[ega2_ofs + src_offset]];
  106.         d[x+10] = d[x+11] = tab[1+2*src[ega2_ofs + src_offset]];
  107.         d[x+12] = d[x+13] = tab[0+2*src[ega3_ofs + src_offset]];
  108.         d[x+14] = d[x+15] = tab[1+2*src[ega3_ofs + src_offset]];
  109.     }
  110. }
  111.  
  112. void rend_atm0_small(unsigned char *dst, unsigned pitch, unsigned y, int Offset)
  113. {
  114.     unsigned char *dst2 = dst + (temp.ox-320)*temp.obpp/16;
  115.     if (temp.scy > 200)
  116.         dst2 += (temp.scy-200)/2*pitch * ((temp.oy > temp.scy)?2:1);
  117.  
  118.     dst2 += y*pitch;
  119.     switch(temp.obpp)
  120.     {
  121.     case 8:
  122.         line_atm0_8(dst2, temp.base, t.p4bpp8[0], Offset);
  123.         dst2 += pitch;
  124.         break;
  125.     case 16:
  126.         line_atm0_16(dst2, temp.base, t.p4bpp16[0], Offset);
  127.         dst2 += pitch;
  128.         break;
  129.     case 32:
  130.         line_atm0_32(dst2, temp.base, t.p4bpp32[0], Offset);
  131.         dst2 += pitch;
  132.         break;
  133.     }
  134. }
  135.  
  136. // EGA 320x200, double
  137. void rend_atm0(unsigned char *dst, unsigned pitch, unsigned y, int Offset)
  138. {
  139.     unsigned char *dst2 = dst + (temp.ox-640)*temp.obpp/16;
  140.     if (temp.scy > 200)
  141.         dst2 += (temp.scy-200)/2*pitch * ((temp.oy > temp.scy)?2:1);
  142.  
  143.     if(conf.fast_sl)
  144.     {
  145.         dst2 += y*pitch;
  146.         switch(temp.obpp)
  147.         {
  148.         case 8:
  149.             line_atm0_8d(dst2, temp.base, t.p4bpp8[0], Offset);
  150.             break;
  151.         case 16:
  152.             line_atm0_16d(dst2, temp.base, t.p4bpp16[0], Offset);
  153.             break;
  154.         case 32:
  155.             line_atm0_32d(dst2, temp.base, t.p4bpp32[0], Offset);
  156.             break;
  157.         }
  158.     }
  159.     else
  160.     {
  161.         dst2 += unsigned(2*y)*pitch;
  162.         switch(temp.obpp)
  163.         {
  164.         case 8:
  165.             line_atm0_8d(dst2, temp.base, t.p4bpp8[0], Offset);
  166.             dst2 += pitch;
  167.             line_atm0_8d(dst2, temp.base, t.p4bpp8[1], Offset);
  168.             break;
  169.         case 16:
  170.             line_atm0_16d(dst2, temp.base, t.p4bpp16[0], Offset);
  171.             dst2 += pitch;
  172.             line_atm0_16d(dst2, temp.base, t.p4bpp16[1], Offset);
  173.             break;
  174.         case 32:
  175.             line_atm0_32d(dst2, temp.base, t.p4bpp32[0], Offset);
  176.             dst2 += pitch;
  177.             line_atm0_32d(dst2, temp.base, t.p4bpp32[1], Offset);
  178.             break;
  179.         }
  180.     }
  181. }
  182.