[f40a309] | 1 | /*
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| 2 | =============================================================================
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| 3 | ucslice.c -- update score display center slice
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| 4 | Version 7 -- 1988-09-28 -- D.N. Lynx Crowe
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| 5 | =============================================================================
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| 6 | */
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| 7 |
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| 8 | #undef DEBUGGER
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| 9 |
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[b28a12e] | 10 | #include "ram.h"
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[f40a309] | 11 |
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| 12 | /*
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| 13 | =============================================================================
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| 14 | ucslice()
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| 15 |
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| 16 | Updates the center slice.
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| 17 |
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| 18 | Note transitions are based on the value of global variable 'sd',
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| 19 | which is zero for forward, and non-zero for backward scrolling.
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| 20 |
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| 21 | Note colors come from 'gtctab[]'.
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| 22 |
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| 23 | This code must be very fast or the display bogs down the system.
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| 24 | =============================================================================
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| 25 | */
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| 26 |
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[0580615] | 27 | void ucslice(void)
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[f40a309] | 28 | {
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[7258c6a] | 29 | register uint16_t *pxptr, *slptr;
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[f40a309] | 30 | register struct gdsel *gdsep;
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[7258c6a] | 31 | register int32_t lc;
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| 32 | register uint16_t i, ncolor, mask1, mask2;
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| 33 | uint16_t *ncptr, *nctabp;
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[f40a309] | 34 | struct gdsel **gdstp, *gdprv, *gdnxt;
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[7258c6a] | 35 | int16_t *lintab;
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[f40a309] | 36 |
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| 37 | DB_ENTR("ucslice()");
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| 38 |
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| 39 | lc = 128L;
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| 40 | mask1 = nbmasks[soffset];
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| 41 | mask2 = ~mask1;
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| 42 |
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| 43 | /* initialize note color, note control, and group control pointers */
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| 44 |
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| 45 | gdstp = gdstbc; /* group control table */
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| 46 | nctabp = sd ? nttab2 : nttab1; /* note transition table */
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| 47 | ncptr = gtctab; /* group to color table */
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| 48 |
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| 49 | lintab = (ac_code EQ N_SHARP) ? lintab1 : lintab2; /* line table */
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| 50 |
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| 51 | for (i = 0; i < 12; i++) { /* scan the group control table ... */
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| 52 |
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| 53 | ncolor = mask1 & *ncptr++; /* get note color mask */
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| 54 | gdprv = (struct gdsel *)gdstp; /* setup previous pointer */
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| 55 | gdsep = *gdstp++; /* setup current pointer */
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| 56 |
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| 57 | if (gdsep) { /* ... process each active group ... */
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| 58 |
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| 59 | do { /* ... for each note played by the group ... */
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| 60 |
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| 61 | if (ndisp EQ 2) { /* ... if display is up */
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| 62 |
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| 63 | /* setup slice and pixel pointers */
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| 64 |
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| 65 | slptr = saddr + 64L +
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[7258c6a] | 66 | ((int32_t)lintab[gdsep->note] << 7);
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[f40a309] | 67 |
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| 68 | pxptr = &pxtbl[gdsep->code][0];
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| 69 |
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| 70 | /* update the slice */
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| 71 |
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| 72 | *slptr = (*slptr & mask2) | (*pxptr++ & ncolor);
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| 73 | slptr += lc;
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| 74 |
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| 75 | *slptr = (*slptr & mask2) | (*pxptr++ & ncolor);
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| 76 | slptr += lc;
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| 77 |
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| 78 | *slptr = (*slptr & mask2) | (*pxptr++ & ncolor);
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| 79 |
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| 80 | }
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| 81 |
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| 82 | gdnxt = gdsep->next; /* set 'next element' pointer */
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| 83 |
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| 84 | /* update and check element code */
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| 85 |
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| 86 | if (0 EQ (gdsep->code = nctabp[gdsep->code])) {
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| 87 |
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| 88 | /* if it's zero, delete the element */
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| 89 |
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| 90 | gdprv->next = gdnxt;
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| 91 | gdsep->next = gdfsep;
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| 92 | gdfsep = gdsep;
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| 93 |
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| 94 | } else
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| 95 | gdprv = gdsep;
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| 96 |
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| 97 | gdsep = gdnxt; /* set pointer for next pass */
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| 98 |
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| 99 | } while (gdsep);
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| 100 | }
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| 101 | }
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| 102 |
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[fa38804] | 103 |
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[f40a309] | 104 | for (; i < NGDSEL; i++) {
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| 105 |
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| 106 | gdprv = (struct gdsel *)gdstp; /* setup previous pointer */
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| 107 | gdsep = *gdstp++; /* setup current pointer */
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| 108 |
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| 109 | if (gdsep) { /* ... process each active event priority ... */
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| 110 |
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| 111 | do { /* ... for each event of this priority ... */
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| 112 |
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| 113 | if (ndisp EQ 2) { /* ... if display is up */
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| 114 |
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| 115 | /* setup slice and pixel pointers */
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| 116 |
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| 117 | slptr = saddr + 27200L;
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| 118 | pxptr = &epxtbl[gdsep->code][0];
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| 119 |
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| 120 | /* get event color */
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| 121 |
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| 122 | ncolor = mask1 & gdsep->note;
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| 123 |
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| 124 | /* update the slice */
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| 125 |
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| 126 | if (*pxptr++) /* 212 */
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| 127 | *slptr = (*slptr & mask2) | ncolor;
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| 128 |
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| 129 | slptr += lc;
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| 130 |
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| 131 | if (*pxptr++) /* 213 */
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| 132 | *slptr = (*slptr & mask2) | ncolor;
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| 133 |
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| 134 | slptr += lc;
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| 135 |
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| 136 | if (*pxptr++) /* 214 */
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| 137 | *slptr = (*slptr & mask2) | ncolor;
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| 138 |
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| 139 | slptr += lc;
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| 140 |
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| 141 | if (*pxptr++) /* 215 */
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| 142 | *slptr = (*slptr & mask2) | ncolor;
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| 143 |
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| 144 | slptr += lc;
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| 145 |
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| 146 | if (*pxptr++) /* 216 */
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| 147 | *slptr = (*slptr & mask2) | ncolor;
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| 148 |
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| 149 | slptr += lc;
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| 150 |
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| 151 | if (*pxptr++) /* 217 */
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| 152 | *slptr = (*slptr & mask2) | ncolor;
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| 153 |
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| 154 | slptr += lc;
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[fa38804] | 155 |
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[f40a309] | 156 | if (*pxptr++) /* 218 */
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| 157 | *slptr = (*slptr & mask2) | ncolor;
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| 158 |
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| 159 | slptr += lc;
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| 160 |
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| 161 | if (*pxptr++) /* 219 */
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| 162 | *slptr = (*slptr & mask2) | ncolor;
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| 163 |
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| 164 | slptr += lc;
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| 165 |
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| 166 | if (*pxptr++) /* 220 */
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| 167 | *slptr = (*slptr & mask2) | ncolor;
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| 168 |
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| 169 | slptr += lc;
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| 170 |
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| 171 | if (*pxptr++) /* 221 */
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| 172 | *slptr = (*slptr & mask2) | ncolor;
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| 173 |
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| 174 | slptr += lc;
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| 175 |
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| 176 | if (*pxptr++) /* 222 */
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| 177 | *slptr = (*slptr & mask2) | ncolor;
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| 178 |
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| 179 | slptr += lc;
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| 180 |
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| 181 | if (*pxptr) /* 223 */
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| 182 | *slptr = (*slptr & mask2) | ncolor;
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| 183 | }
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| 184 |
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| 185 | gdnxt = gdsep->next; /* set next pointer */
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| 186 | gdprv->next = gdnxt; /* delete the element */
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| 187 | gdsep->next = gdfsep;
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| 188 | gdfsep = gdsep;
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| 189 | gdsep = gdnxt; /* set pointer for next pass */
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| 190 |
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| 191 | } while (gdsep);
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| 192 | }
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| 193 | }
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| 194 |
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| 195 | DB_EXIT("ucslice");
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| 196 | }
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[6262b5c] | 197 |
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