[f40a309] | 1 | /*
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| 2 | =============================================================================
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| 3 | smscrl.c -- MIDAS-VII smooth scrolling functions
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| 4 | Version 37 -- 1989-11-16 -- D.N. Lynx Crowe
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| 5 | =============================================================================
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| 6 | */
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| 7 |
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| 8 | #define OLDSCRL 0
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| 9 |
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[b28a12e] | 10 | #include "ram.h"
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[e225e77] | 11 |
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[f40a309] | 12 | #define SS_NSL 16 /* number of scrolled lines */
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| 13 | #define SS_TOP (2 * (SS_NSL + 1)) /* total line count */
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| 14 | #define SS_LIM (SS_TOP - SS_NSL) /* top line limit */
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| 15 | #define SS_LEN 48 /* length of a scrolled line */
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| 16 | #define NSCANS 14 /* number of scan lines */
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| 17 | #define TOPSCAN (NSCANS - 1) /* top scan line */
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| 18 |
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[7258c6a] | 19 | int8_t TheBuf[66]; /* display build buffer */
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[f40a309] | 20 |
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[7258c6a] | 21 | int8_t *(*BakLine)(void); /* next line backward function pointer */
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| 22 | int8_t *(*FwdLine)(void); /* next line forward function pointer */
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[f40a309] | 23 |
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[7258c6a] | 24 | int16_t PdScDnF; /* scroll down flag */
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| 25 | int16_t PdScUpF; /* scroll up flag */
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[f40a309] | 26 |
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[7258c6a] | 27 | int16_t CurLine; /* top line being displayed */
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| 28 | int16_t CurScan; /* current scan line */
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| 29 | int16_t DupLine; /* write pointer for other page */
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| 30 | int16_t ScrlObj; /* object descriptor table index */
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[f40a309] | 31 |
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[7258c6a] | 32 | int8_t *LinePtr; /* line to scroll onto screen */
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[f40a309] | 33 |
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[7258c6a] | 34 | uint16_t LineAtr; /* attribute for the new line */
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[f40a309] | 35 |
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[7258c6a] | 36 | uint16_t *LineBuf; /* current display memory pointer */
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| 37 | uint16_t *OldLine; /* old display memory pointer */
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| 38 | uint16_t *ScObAdr; /* display memory base pointer */
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[f40a309] | 39 |
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[7258c6a] | 40 | int16_t LineCon = SS_LEN * 3; /* line offset constant */
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| 41 | int16_t LineLen = SS_LEN; /* length of a scrolled line */
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| 42 | int16_t SmScLim = SS_LIM; /* top line limit */
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| 43 | int16_t SmScNsl = SS_NSL; /* number of scrolled lines */
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| 44 | int16_t SmScTop = SS_TOP; /* total line count */
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[f40a309] | 45 |
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| 46 | /*
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| 47 | =============================================================================
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| 48 | LineFwd() -- return the next patch line in the forward direction
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| 49 | =============================================================================
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| 50 | */
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| 51 |
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[7258c6a] | 52 | int8_t *LineFwd(void)
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[f40a309] | 53 | {
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[7258c6a] | 54 | register int16_t j, k;
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[f40a309] | 55 |
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| 56 | for (j = 0; j < 48; j++)
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| 57 | TheBuf[j] = ' ';
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| 58 |
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| 59 | TheBuf[0] = '\260';
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| 60 | TheBuf[48] = '\0';
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| 61 |
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| 62 | if (0 EQ ptecpos)
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[7258c6a] | 63 | return((int8_t *)NULL);
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[f40a309] | 64 |
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| 65 | if (0 EQ (j = findnxt(ptecpos)))
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[7258c6a] | 66 | return((int8_t *)NULL);
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[f40a309] | 67 |
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| 68 | ptecpos = j;
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| 69 |
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| 70 | memcpyw(&ptebuf.defnum, &patches[ptecpos].defnum, 6);
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| 71 | pteset = TRUE;
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| 72 | pte2buf();
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| 73 |
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| 74 | k = ptecpos;
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| 75 |
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| 76 | for (j = 0; j < 8; j++)
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| 77 | if (0 EQ (k = findnxt(k)))
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| 78 | return(TheBuf);
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| 79 |
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| 80 | dspdfst(&TheBuf[ 2], patches[k].defnum);
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| 81 | dspdfst(&TheBuf[15], patches[k].stmnum);
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| 82 | dspdest(&TheBuf[28], &patches[k]);
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| 83 |
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| 84 | for (j = 0; j < 50; j++)
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| 85 | if(TheBuf[j] EQ '\0')
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| 86 | TheBuf[j] = ' ';
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| 87 |
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| 88 | TheBuf[48] = '\0';
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| 89 | return(TheBuf);
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| 90 | }
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| 91 |
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| 92 | /*
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| 93 | =============================================================================
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| 94 | LineBak() -- return the next patch line in the backward direction
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| 95 | =============================================================================
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| 96 | */
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| 97 |
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[7258c6a] | 98 | int8_t *LineBak(void)
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[f40a309] | 99 | {
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[7258c6a] | 100 | register int16_t j, k;
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[f40a309] | 101 |
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| 102 | for (j = 0; j < 48; j++)
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| 103 | TheBuf[j] = ' ';
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| 104 |
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| 105 | TheBuf[0] = '\260';
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| 106 | TheBuf[48] = '\0';
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| 107 |
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| 108 | if (0 EQ ptecpos)
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[7258c6a] | 109 | return((int8_t *)NULL);
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[f40a309] | 110 |
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| 111 | if (0 EQ (j = findprv(ptecpos)))
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[7258c6a] | 112 | return((int8_t *)NULL);
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[f40a309] | 113 |
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| 114 | ptecpos = j;
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| 115 |
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| 116 | memcpyw(&ptebuf.defnum, &patches[ptecpos].defnum, 6);
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| 117 | pteset = TRUE;
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| 118 | pte2buf();
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| 119 |
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| 120 | k = ptecpos;
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| 121 |
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| 122 | for (j = 0; j < 7; j++)
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| 123 | if (0 EQ (k = findprv(k)))
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| 124 | return(TheBuf);
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| 125 |
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| 126 | dspdfst(&TheBuf[ 2], patches[k].defnum);
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| 127 | dspdfst(&TheBuf[15], patches[k].stmnum);
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| 128 | dspdest(&TheBuf[28], &patches[k]);
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| 129 |
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| 130 | for (j = 0; j < 50; j++)
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| 131 | if(TheBuf[j] EQ '\0')
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| 132 | TheBuf[j] = ' ';
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| 133 |
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| 134 | TheBuf[48] = '\0';
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| 135 | return(TheBuf);
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| 136 | }
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| 137 |
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| 138 | /*
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| 139 | =============================================================================
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| 140 | WrVideo() -- write a line to the video display
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| 141 | =============================================================================
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| 142 | */
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| 143 |
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[7258c6a] | 144 | void WrVideo(int16_t row, int16_t col, int8_t *str, uint16_t atr)
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[f40a309] | 145 | {
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[7258c6a] | 146 | register int8_t chr;
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[f40a309] | 147 |
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| 148 | if (v_regs[5] & 0x0180)
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| 149 | vbank(0);
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| 150 |
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| 151 | while ('\0' NE (chr = *str++)) {
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| 152 |
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| 153 | vputcv(ScObAdr, row, col, chr,
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| 154 | (col EQ 0) ? PTBATR : atr, LineLen);
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| 155 |
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| 156 | col++;
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| 157 | }
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| 158 | }
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| 159 |
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| 160 | /*
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| 161 | =============================================================================
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| 162 | SetDTop() -- set the top line of the display
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| 163 | =============================================================================
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| 164 | */
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| 165 |
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[7258c6a] | 166 | void SetDTop(int16_t row, int16_t scan)
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[f40a309] | 167 | {
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| 168 | if (v_regs[5] & 0x0180)
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| 169 | vbank(0);
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| 170 |
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[7258c6a] | 171 | LineBuf = (uint16_t *)((int8_t *)ScObAdr + (row * LineCon));
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[f40a309] | 172 |
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| 173 | if (OldLine NE LineBuf)
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[7258c6a] | 174 | v_odtab[ScrlObj][2] = ((int32_t)LineBuf >> 1) & 0xFFFF;
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[f40a309] | 175 |
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| 176 | OldLine = LineBuf;
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| 177 |
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| 178 | v_odtab[ScrlObj][0] = (v_odtab[ScrlObj][0] & 0x0FFF) | (scan << 12);
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| 179 | }
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| 180 |
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| 181 | /*
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| 182 | =============================================================================
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| 183 | UpdVid() -- update the video display on both pages
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| 184 | =============================================================================
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| 185 | */
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| 186 |
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[7258c6a] | 187 | void UpdVid(int16_t row, int16_t col, int8_t *str, uint16_t atr)
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[f40a309] | 188 | {
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| 189 | WrVideo(CurLine + row, col, str, atr);
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| 190 |
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| 191 | DupLine = CurLine + SmScNsl + 2 + row;
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| 192 |
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| 193 | if (DupLine < SmScTop)
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| 194 | WrVideo(DupLine, col, str, PTPATR);
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| 195 |
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| 196 | DupLine = CurLine - SmScNsl - 2 + row;
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| 197 |
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| 198 | if (DupLine GE 0)
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| 199 | WrVideo(DupLine, col, str, PTPATR);
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| 200 | }
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| 201 |
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| 202 | /*
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| 203 | =============================================================================
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| 204 | bgncm() -- begin patch display cursor motion
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| 205 | =============================================================================
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| 206 | */
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| 207 |
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[0580615] | 208 | void bgncm(void)
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[f40a309] | 209 | {
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[7258c6a] | 210 | register int16_t j;
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[f40a309] | 211 |
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| 212 | memcpyw(&ptebuf.defnum, &patches[ptecpos].defnum, 6);
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| 213 | pteset = TRUE;
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| 214 | pte2buf();
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| 215 |
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| 216 | memcpy(TheBuf, ptdebuf, 48);
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| 217 |
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| 218 | for (j = 0; j < 50; j++)
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| 219 | if(TheBuf[j] EQ '\0')
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| 220 | TheBuf[j] = ' ';
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| 221 |
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| 222 | TheBuf[0] = '\260';
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| 223 | TheBuf[1] = ' ';
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| 224 | TheBuf[48] = '\0';
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| 225 |
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| 226 | UpdVid(7, 0, TheBuf, PTPATR);
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| 227 | ctcoff();
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| 228 | }
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| 229 |
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| 230 | /*
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| 231 | =============================================================================
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| 232 | stopcm() -- stop patch display cursor motion
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| 233 | =============================================================================
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| 234 | */
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| 235 |
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[0580615] | 236 | void stopcm(void)
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[f40a309] | 237 | {
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| 238 | if (PdScDnF)
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| 239 | SetDTop(CurLine, CurScan = TOPSCAN);
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| 240 | else if (PdScUpF)
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| 241 | SetDTop(++CurLine, CurScan = TOPSCAN);
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| 242 |
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| 243 | if (NOT ctcsw) { /* if we scrolled ... */
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| 244 |
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| 245 | if (ptecpos) { /* if something is there ... */
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| 246 |
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| 247 | /* refresh editing variables */
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| 248 |
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| 249 | memcpyw(&ptebuf.defnum, &patches[ptecpos].defnum, 6);
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| 250 | pteset = TRUE;
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| 251 | pte2buf();
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| 252 | setptcv();
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| 253 |
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| 254 | } else { /* ... nothing there */
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| 255 |
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| 256 | voidpb(); /* void the patch buffer */
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| 257 | }
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| 258 | }
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| 259 |
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| 260 | ctcon(); /* re-enable cursor */
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| 261 |
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| 262 | PdScDnF = FALSE; /* turn off the scrolling flags */
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| 263 | PdScUpF = FALSE;
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| 264 | }
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| 265 |
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| 266 | /*
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| 267 | =============================================================================
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| 268 | stopsm() -- stop sequence display cursor motion
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| 269 | =============================================================================
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| 270 | */
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| 271 |
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[0580615] | 272 | void stopsm(void)
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[f40a309] | 273 | {
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| 274 | if (PdScDnF)
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| 275 | SetDTop(CurLine, CurScan = TOPSCAN);
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| 276 | else if (PdScUpF)
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| 277 | SetDTop(++CurLine, CurScan = TOPSCAN);
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| 278 |
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| 279 | memcpyw(&seqbuf, &seqtab[curslin], NSEQW);
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| 280 | dsqlin(sqdebuf, curslin);
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| 281 | sqdeflg = TRUE;
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| 282 | ctcon();
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| 283 |
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| 284 | PdScDnF = FALSE;
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| 285 | PdScUpF = FALSE;
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| 286 | }
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| 287 |
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| 288 | /*
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| 289 | =============================================================================
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| 290 | smscrl() -- smooth scroll the text display up or down
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| 291 | =============================================================================
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| 292 | */
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| 293 |
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[0580615] | 294 | void smscrl(void)
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[f40a309] | 295 | {
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| 296 | if (PdScUpF) { /* SCROLL UP (toward NEW data) ? */
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| 297 |
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| 298 | if (CurScan EQ TOPSCAN) { /* ready for a new line ? */
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| 299 |
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[7258c6a] | 300 | if ((int8_t *)NULL NE (LinePtr = (*FwdLine)())) { /* get a line */
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[f40a309] | 301 |
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| 302 | if (CurLine EQ SmScLim) { /* *** swap display pages *** */
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| 303 |
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| 304 | /* update page we're going to */
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| 305 |
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| 306 | WrVideo(SmScNsl, 0, LinePtr, LineAtr);
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| 307 |
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| 308 | /* point at new page */
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| 309 |
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| 310 | SetDTop(CurLine = 0, CurScan = TOPSCAN);
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| 311 |
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| 312 | } else { /* *** stay on this page *** */
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| 313 |
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| 314 | /* update scroll target line */
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| 315 |
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| 316 | WrVideo(CurLine + SmScNsl, 0, LinePtr, LineAtr);
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| 317 |
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| 318 | /* update other page if it's in range */
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| 319 |
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| 320 | DupLine = CurLine - 2;
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| 321 |
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| 322 | if (DupLine GE 0)
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| 323 | WrVideo(DupLine, 0, LinePtr, LineAtr);
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| 324 | }
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| 325 |
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| 326 | /* do first scroll up of new line */
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| 327 |
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| 328 | SetDTop(CurLine, --CurScan);
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| 329 | }
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| 330 |
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| 331 | } else { /* scrolling -- scroll some more */
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| 332 |
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| 333 | if (CurScan EQ 0)
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| 334 | SetDTop(++CurLine, CurScan = TOPSCAN);
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| 335 | else
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| 336 | SetDTop(CurLine, --CurScan);
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| 337 | }
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[fa38804] | 338 |
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[f40a309] | 339 | } else if (PdScDnF) { /* SCROLL DOWN (toward old data) ? */
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| 340 |
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| 341 | if (CurScan EQ TOPSCAN) { /* ready for a new line ? */
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| 342 |
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[7258c6a] | 343 | if ((int8_t *)NULL NE (LinePtr = (*BakLine)())) { /* get a line */
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[f40a309] | 344 |
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| 345 | if (CurLine EQ 0) { /* *** swap display pages *** */
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| 346 |
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| 347 | /* update page we're going to */
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| 348 |
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| 349 | WrVideo(SmScLim - 1, 0, LinePtr, LineAtr);
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| 350 |
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| 351 | /* point at new page */
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| 352 |
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| 353 | SetDTop(CurLine = SmScLim - 1, CurScan = 0);
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| 354 |
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| 355 | } else { /* *** stay on this page *** */
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| 356 |
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| 357 | /* update scroll target line */
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| 358 |
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| 359 | WrVideo(CurLine - 1, 0, LinePtr, LineAtr);
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| 360 |
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| 361 | /* update other page if it's in range */
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| 362 |
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| 363 | DupLine = CurLine + SmScNsl + 1;
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| 364 |
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| 365 | if (DupLine < SmScTop)
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| 366 | WrVideo(DupLine, 0, LinePtr, LineAtr);
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| 367 |
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| 368 | /* do first scroll down of new line */
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| 369 |
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| 370 | SetDTop(--CurLine, CurScan = 0);
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| 371 | }
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| 372 | }
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| 373 |
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| 374 | } else { /* scrolling -- scroll some more */
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| 375 |
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| 376 | if (CurScan NE TOPSCAN)
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| 377 | SetDTop(CurLine, ++CurScan);
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| 378 | }
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| 379 | }
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| 380 | }
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| 381 |
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| 382 | /*
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| 383 | =============================================================================
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| 384 | smxupd() -- patch / sequence smooth scroll X axis update
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| 385 | =============================================================================
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| 386 | */
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| 387 |
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[0580615] | 388 | void smxupd(void)
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[f40a309] | 389 | {
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[7258c6a] | 390 | int16_t oldcx;
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[f40a309] | 391 |
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| 392 | oldcx = cxval;
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| 393 |
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| 394 | if (submenu) {
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| 395 |
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| 396 | vtccol = XTOC(vtxval += cxrate);
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| 397 |
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| 398 | if (vtccol > 60)
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| 399 | vtxval = CTOX(vtccol = 60);
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| 400 | else if (vtccol < 2)
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| 401 | vtxval = CTOX(vtccol = 2);
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| 402 |
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| 403 | } else {
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| 404 |
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| 405 | cxval += cxrate;
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| 406 |
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| 407 | if (cxval > CTOX(48))
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| 408 | cxval = CTOX(48);
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| 409 | else if (cxval < CTOX(2))
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| 410 | cxval = CTOX(2);
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| 411 |
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| 412 | if (cxval EQ oldcx)
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| 413 | return;
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| 414 |
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| 415 | if (47 EQ XTOC(cxval)) {
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| 416 |
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| 417 | if (v_regs[5] & 0x0180)
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| 418 | vbank(0);
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| 419 |
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| 420 | vvputsv(obj10, 16, PDBORFG, PDSEQBG,
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| 421 | 7, 0, "\260", 14, 14, cg3);
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| 422 |
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| 423 | vsplot4(obj10, 16, PDPTRFG,
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| 424 | 7, 0, "\274", 14, 14, cg3);
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| 425 |
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| 426 | } else if (48 EQ XTOC(cxval)) {
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| 427 |
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| 428 | if (v_regs[5] & 0x0180)
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| 429 | vbank(0);
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| 430 |
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| 431 | vvputsv(obj10, 16, PDBORFG, PDSEQBG,
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| 432 | 7, 0, "\260", 14, 14, cg3);
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| 433 |
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| 434 | vsplot4(obj10, 16, PDPTRFG,
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| 435 | 7, 0, "\277", 14, 14, cg3);
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| 436 |
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| 437 | }
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[9519422] | 438 |
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[f40a309] | 439 | return;
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| 440 | }
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| 441 | }
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| 442 |
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| 443 | /*
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| 444 | =============================================================================
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| 445 | smy_up() -- patch display smooth scrolling
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| 446 | =============================================================================
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| 447 | */
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| 448 |
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[7258c6a] | 449 | void smy_up(int16_t tag)
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[f40a309] | 450 | {
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| 451 |
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| 452 | if (0 EQ ptecpos) { /* see if anything is there */
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| 453 |
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| 454 | dptw(); /* try to find something ... */
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| 455 | return; /* ... may scroll next time */
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| 456 | }
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| 457 |
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| 458 | if (ctcsw) /* if we haven't scrolled yet ... */
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| 459 | bgncm(); /* ... setup for scrolling */
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| 460 |
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| 461 | if (tag < 0) { /* scroll up */
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| 462 |
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| 463 | if (0 EQ findnxt(ptecpos))
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| 464 | return;
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| 465 |
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| 466 | PdScUpF = TRUE;
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| 467 | PdScDnF = FALSE;
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| 468 | smscrl();
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| 469 |
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| 470 | } else if (tag > 0) { /* scroll down */
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| 471 |
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| 472 | if (0 EQ findprv(ptecpos))
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| 473 | return;
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| 474 |
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| 475 | PdScDnF = TRUE;
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| 476 | PdScUpF = FALSE;
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| 477 | smscrl();
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| 478 | }
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| 479 | }
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| 480 |
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| 481 | /*
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| 482 | =============================================================================
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| 483 | smyupd() -- patch display smooth scroll Y axis update
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| 484 | =============================================================================
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| 485 | */
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| 486 |
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[0580615] | 487 | void smyupd(void)
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[f40a309] | 488 | {
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| 489 | if (submenu) {
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| 490 |
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| 491 | vtcrow = YTOR(vtyval += cyrate);
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| 492 |
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| 493 | if (vtcrow > 23)
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| 494 | vtyval = RTOY(vtcrow = 23);
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| 495 | else if (vtcrow < 19)
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| 496 | vtyval = RTOY(vtcrow = 19);
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| 497 |
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| 498 | }
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| 499 |
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| 500 | #if OLDSCRL
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| 501 | smy_up(cyrate);
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| 502 | #endif
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| 503 | }
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| 504 |
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| 505 | /*
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| 506 | =============================================================================
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| 507 | sqy_up() -- sequence smooth scrolling
|
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| 508 | =============================================================================
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| 509 | */
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| 510 |
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[7258c6a] | 511 | void sqy_up(int16_t tag)
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[f40a309] | 512 | {
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| 513 | if (ctcsw)
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| 514 | ctcoff();
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| 515 |
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| 516 | if (tag < 0) { /* scroll up */
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| 517 |
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| 518 | PdScUpF = TRUE;
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| 519 | PdScDnF = FALSE;
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| 520 | smscrl();
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| 521 |
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| 522 | } else if (tag > 0) { /* scroll down */
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| 523 |
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| 524 | PdScDnF = TRUE;
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| 525 | PdScUpF = FALSE;
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| 526 | smscrl();
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| 527 | }
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| 528 | }
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| 529 |
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| 530 | /*
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| 531 | =============================================================================
|
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| 532 | sqyupd() -- sequence smooth scroll Y axis update
|
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| 533 | =============================================================================
|
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| 534 | */
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| 535 |
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[0580615] | 536 | void sqyupd(void)
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[f40a309] | 537 | {
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| 538 | if (submenu) {
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| 539 |
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| 540 | vtcrow = YTOR(vtyval += cyrate);
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| 541 |
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| 542 | if (vtcrow > 23)
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| 543 | vtyval = RTOY(vtcrow = 23);
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| 544 | else if (vtcrow < 19)
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| 545 | vtyval = RTOY(vtcrow = 19);
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| 546 |
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| 547 | }
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| 548 |
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| 549 | #if OLDSCRL
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| 550 | sqy_up(cyrate);
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| 551 | #endif
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| 552 | }
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[6262b5c] | 553 |
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