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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10 | #include "ram.h"
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11 |
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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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19 | int8_t TheBuf[66]; /* display build buffer */
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20 |
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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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23 |
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24 | int16_t PdScDnF; /* scroll down flag */
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25 | int16_t PdScUpF; /* scroll up flag */
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26 |
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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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31 |
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32 | int8_t *LinePtr; /* line to scroll onto screen */
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33 |
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34 | uint16_t LineAtr; /* attribute for the new line */
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35 |
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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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39 |
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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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45 |
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46 | /* |
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47 |
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48 | */
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49 |
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50 | /*
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51 | =============================================================================
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52 | LineFwd() -- return the next patch line in the forward direction
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53 | =============================================================================
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54 | */
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55 |
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56 | int8_t *LineFwd(void)
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57 | {
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58 | register int16_t j, k;
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59 |
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60 | for (j = 0; j < 48; j++)
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61 | TheBuf[j] = ' ';
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62 |
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63 | TheBuf[0] = '\260';
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64 | TheBuf[48] = '\0';
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65 |
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66 | if (0 EQ ptecpos)
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67 | return((int8_t *)NULL);
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68 |
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69 | if (0 EQ (j = findnxt(ptecpos)))
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70 | return((int8_t *)NULL);
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71 |
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72 | ptecpos = j;
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73 |
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74 | memcpyw(&ptebuf.defnum, &patches[ptecpos].defnum, 6);
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75 | pteset = TRUE;
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76 | pte2buf();
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77 |
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78 | k = ptecpos;
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79 |
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80 | for (j = 0; j < 8; j++)
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81 | if (0 EQ (k = findnxt(k)))
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82 | return(TheBuf);
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83 |
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84 | dspdfst(&TheBuf[ 2], patches[k].defnum);
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85 | dspdfst(&TheBuf[15], patches[k].stmnum);
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86 | dspdest(&TheBuf[28], &patches[k]);
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87 |
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88 | for (j = 0; j < 50; j++)
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89 | if(TheBuf[j] EQ '\0')
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90 | TheBuf[j] = ' ';
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91 |
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92 | TheBuf[48] = '\0';
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93 | return(TheBuf);
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94 | }
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95 |
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96 | /* |
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97 |
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98 | */
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99 |
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100 | /*
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101 | =============================================================================
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102 | LineBak() -- return the next patch line in the backward direction
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103 | =============================================================================
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104 | */
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105 |
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106 | int8_t *LineBak(void)
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107 | {
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108 | register int16_t j, k;
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109 |
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110 | for (j = 0; j < 48; j++)
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111 | TheBuf[j] = ' ';
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112 |
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113 | TheBuf[0] = '\260';
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114 | TheBuf[48] = '\0';
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115 |
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116 | if (0 EQ ptecpos)
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117 | return((int8_t *)NULL);
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118 |
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119 | if (0 EQ (j = findprv(ptecpos)))
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120 | return((int8_t *)NULL);
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121 |
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122 | ptecpos = j;
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123 |
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124 | memcpyw(&ptebuf.defnum, &patches[ptecpos].defnum, 6);
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125 | pteset = TRUE;
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126 | pte2buf();
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127 |
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128 | k = ptecpos;
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129 |
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130 | for (j = 0; j < 7; j++)
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131 | if (0 EQ (k = findprv(k)))
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132 | return(TheBuf);
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133 |
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134 | dspdfst(&TheBuf[ 2], patches[k].defnum);
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135 | dspdfst(&TheBuf[15], patches[k].stmnum);
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136 | dspdest(&TheBuf[28], &patches[k]);
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137 |
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138 | for (j = 0; j < 50; j++)
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139 | if(TheBuf[j] EQ '\0')
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140 | TheBuf[j] = ' ';
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141 |
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142 | TheBuf[48] = '\0';
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143 | return(TheBuf);
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144 | }
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145 |
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146 | /* |
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147 |
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148 | */
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149 |
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150 | /*
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151 | =============================================================================
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152 | WrVideo() -- write a line to the video display
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153 | =============================================================================
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154 | */
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155 |
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156 | void WrVideo(int16_t row, int16_t col, int8_t *str, uint16_t atr)
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157 | {
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158 | register int8_t chr;
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159 |
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160 | if (v_regs[5] & 0x0180)
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161 | vbank(0);
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162 |
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163 | while ('\0' NE (chr = *str++)) {
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164 |
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165 | vputcv(ScObAdr, row, col, chr,
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166 | (col EQ 0) ? PTBATR : atr, LineLen);
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167 |
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168 | col++;
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169 | }
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170 | }
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171 |
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172 | /* |
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173 |
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174 | */
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175 |
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176 | /*
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177 | =============================================================================
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178 | SetDTop() -- set the top line of the display
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179 | =============================================================================
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180 | */
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181 |
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182 | void SetDTop(int16_t row, int16_t scan)
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183 | {
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184 | if (v_regs[5] & 0x0180)
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185 | vbank(0);
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186 |
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187 | LineBuf = (uint16_t *)((int8_t *)ScObAdr + (row * LineCon));
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188 |
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189 | if (OldLine NE LineBuf)
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190 | v_odtab[ScrlObj][2] = ((int32_t)LineBuf >> 1) & 0xFFFF;
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191 |
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192 | OldLine = LineBuf;
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193 |
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194 | v_odtab[ScrlObj][0] = (v_odtab[ScrlObj][0] & 0x0FFF) | (scan << 12);
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195 | }
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196 |
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197 | /* |
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198 |
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199 | */
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200 |
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201 | /*
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202 | =============================================================================
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203 | UpdVid() -- update the video display on both pages
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204 | =============================================================================
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205 | */
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206 |
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207 | void UpdVid(int16_t row, int16_t col, int8_t *str, uint16_t atr)
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208 | {
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209 | WrVideo(CurLine + row, col, str, atr);
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210 |
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211 | DupLine = CurLine + SmScNsl + 2 + row;
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212 |
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213 | if (DupLine < SmScTop)
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214 | WrVideo(DupLine, col, str, PTPATR);
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215 |
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216 | DupLine = CurLine - SmScNsl - 2 + row;
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217 |
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218 | if (DupLine GE 0)
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219 | WrVideo(DupLine, col, str, PTPATR);
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220 | }
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221 |
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222 | /* |
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223 |
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224 | */
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225 |
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226 | /*
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227 | =============================================================================
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228 | bgncm() -- begin patch display cursor motion
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229 | =============================================================================
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230 | */
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231 |
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232 | void bgncm(void)
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233 | {
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234 | register int16_t j;
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235 |
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236 | memcpyw(&ptebuf.defnum, &patches[ptecpos].defnum, 6);
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237 | pteset = TRUE;
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238 | pte2buf();
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239 |
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240 | memcpy(TheBuf, ptdebuf, 48);
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241 |
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242 | for (j = 0; j < 50; j++)
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243 | if(TheBuf[j] EQ '\0')
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244 | TheBuf[j] = ' ';
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245 |
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246 | TheBuf[0] = '\260';
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247 | TheBuf[1] = ' ';
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248 | TheBuf[48] = '\0';
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249 |
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250 | UpdVid(7, 0, TheBuf, PTPATR);
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251 | ctcoff();
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252 | }
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253 |
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254 | /* |
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255 |
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256 | */
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257 |
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258 | /*
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259 | =============================================================================
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260 | stopcm() -- stop patch display cursor motion
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261 | =============================================================================
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262 | */
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263 |
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264 | void stopcm(void)
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265 | {
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266 | register int16_t i;
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267 |
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268 | if (PdScDnF)
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269 | SetDTop(CurLine, CurScan = TOPSCAN);
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270 | else if (PdScUpF)
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271 | SetDTop(++CurLine, CurScan = TOPSCAN);
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272 |
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273 | if (NOT ctcsw) { /* if we scrolled ... */
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274 |
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275 | if (ptecpos) { /* if something is there ... */
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276 |
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277 | /* refresh editing variables */
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278 |
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279 | memcpyw(&ptebuf.defnum, &patches[ptecpos].defnum, 6);
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280 | pteset = TRUE;
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281 | pte2buf();
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282 | setptcv();
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283 |
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284 | } else { /* ... nothing there */
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285 |
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286 | voidpb(); /* void the patch buffer */
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287 | }
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288 | }
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289 |
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290 | ctcon(); /* re-enable cursor */
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291 |
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292 | PdScDnF = FALSE; /* turn off the scrolling flags */
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293 | PdScUpF = FALSE;
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294 | }
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295 |
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296 | /* |
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297 |
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298 | */
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299 |
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300 | /*
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301 | =============================================================================
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302 | stopsm() -- stop sequence display cursor motion
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303 | =============================================================================
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304 | */
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305 |
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306 | void stopsm(void)
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307 | {
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308 | register int16_t i;
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309 |
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310 | if (PdScDnF)
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311 | SetDTop(CurLine, CurScan = TOPSCAN);
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312 | else if (PdScUpF)
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313 | SetDTop(++CurLine, CurScan = TOPSCAN);
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314 |
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315 | memcpyw(&seqbuf, &seqtab[curslin], NSEQW);
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316 | dsqlin(sqdebuf, curslin);
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317 | sqdeflg = TRUE;
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318 | ctcon();
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319 |
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320 | PdScDnF = FALSE;
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321 | PdScUpF = FALSE;
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322 | }
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323 |
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324 | /* |
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325 |
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326 | */
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327 |
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328 | /*
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329 | =============================================================================
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330 | smscrl() -- smooth scroll the text display up or down
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331 | =============================================================================
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332 | */
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333 |
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334 | void smscrl(void)
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335 | {
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336 | if (PdScUpF) { /* SCROLL UP (toward NEW data) ? */
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337 |
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338 | if (CurScan EQ TOPSCAN) { /* ready for a new line ? */
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339 |
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340 | if ((int8_t *)NULL NE (LinePtr = (*FwdLine)())) { /* get a line */
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341 |
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342 | if (CurLine EQ SmScLim) { /* *** swap display pages *** */
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343 |
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344 | /* update page we're going to */
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345 |
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346 | WrVideo(SmScNsl, 0, LinePtr, LineAtr);
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347 |
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348 | /* point at new page */
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349 |
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350 | SetDTop(CurLine = 0, CurScan = TOPSCAN);
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351 |
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352 | } else { /* *** stay on this page *** */
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353 |
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354 | /* update scroll target line */
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355 |
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356 | WrVideo(CurLine + SmScNsl, 0, LinePtr, LineAtr);
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357 |
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358 | /* update other page if it's in range */
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359 |
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360 | DupLine = CurLine - 2;
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361 |
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362 | if (DupLine GE 0)
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363 | WrVideo(DupLine, 0, LinePtr, LineAtr);
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364 | }
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365 |
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366 | /* do first scroll up of new line */
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367 |
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368 | SetDTop(CurLine, --CurScan);
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369 | }
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370 |
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371 | } else { /* scrolling -- scroll some more */
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372 |
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373 | if (CurScan EQ 0)
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374 | SetDTop(++CurLine, CurScan = TOPSCAN);
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375 | else
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376 | SetDTop(CurLine, --CurScan);
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377 | }
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378 | /* |
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379 |
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380 | */
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381 | } else if (PdScDnF) { /* SCROLL DOWN (toward old data) ? */
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382 |
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383 | if (CurScan EQ TOPSCAN) { /* ready for a new line ? */
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384 |
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385 | if ((int8_t *)NULL NE (LinePtr = (*BakLine)())) { /* get a line */
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386 |
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387 | if (CurLine EQ 0) { /* *** swap display pages *** */
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388 |
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389 | /* update page we're going to */
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390 |
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391 | WrVideo(SmScLim - 1, 0, LinePtr, LineAtr);
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392 |
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393 | /* point at new page */
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394 |
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395 | SetDTop(CurLine = SmScLim - 1, CurScan = 0);
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396 |
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397 | } else { /* *** stay on this page *** */
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398 |
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399 | /* update scroll target line */
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400 |
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401 | WrVideo(CurLine - 1, 0, LinePtr, LineAtr);
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402 |
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403 | /* update other page if it's in range */
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404 |
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405 | DupLine = CurLine + SmScNsl + 1;
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406 |
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407 | if (DupLine < SmScTop)
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408 | WrVideo(DupLine, 0, LinePtr, LineAtr);
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409 |
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410 | /* do first scroll down of new line */
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411 |
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412 | SetDTop(--CurLine, CurScan = 0);
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413 | }
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414 | }
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415 |
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416 | } else { /* scrolling -- scroll some more */
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417 |
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418 | if (CurScan NE TOPSCAN)
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419 | SetDTop(CurLine, ++CurScan);
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420 | }
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421 | }
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422 | }
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423 |
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424 | /* |
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425 |
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426 | */
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427 |
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428 | /*
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429 | =============================================================================
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430 | smxupd() -- patch / sequence smooth scroll X axis update
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431 | =============================================================================
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432 | */
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433 |
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434 | void smxupd(void)
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435 | {
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436 | int16_t oldcx;
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437 |
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438 | oldcx = cxval;
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439 |
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440 | if (submenu) {
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441 |
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442 | vtccol = XTOC(vtxval += cxrate);
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443 |
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444 | if (vtccol > 60)
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445 | vtxval = CTOX(vtccol = 60);
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446 | else if (vtccol < 2)
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447 | vtxval = CTOX(vtccol = 2);
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448 |
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449 | } else {
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450 |
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451 | cxval += cxrate;
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452 |
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453 | if (cxval > CTOX(48))
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454 | cxval = CTOX(48);
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455 | else if (cxval < CTOX(2))
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456 | cxval = CTOX(2);
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457 |
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458 | if (cxval EQ oldcx)
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459 | return;
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460 |
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461 | if (47 EQ XTOC(cxval)) {
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462 |
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463 | if (v_regs[5] & 0x0180)
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464 | vbank(0);
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465 |
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466 | vvputsv(obj10, 16, PDBORFG, PDSEQBG,
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467 | 7, 0, "\260", 14, 14, cg3);
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468 |
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469 | vsplot4(obj10, 16, PDPTRFG,
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470 | 7, 0, "\274", 14, 14, cg3);
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471 |
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472 | } else if (48 EQ XTOC(cxval)) {
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473 |
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474 | if (v_regs[5] & 0x0180)
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475 | vbank(0);
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476 |
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477 | vvputsv(obj10, 16, PDBORFG, PDSEQBG,
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478 | 7, 0, "\260", 14, 14, cg3);
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479 |
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480 | vsplot4(obj10, 16, PDPTRFG,
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481 | 7, 0, "\277", 14, 14, cg3);
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482 |
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483 | }
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484 |
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485 | return;
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486 | }
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487 | }
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488 |
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489 | /* |
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490 |
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491 | */
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492 |
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493 | /*
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494 | =============================================================================
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495 | smy_up() -- patch display smooth scrolling
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496 | =============================================================================
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497 | */
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498 |
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499 | void smy_up(int16_t tag)
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500 | {
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501 |
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502 | if (0 EQ ptecpos) { /* see if anything is there */
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503 |
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504 | dptw(); /* try to find something ... */
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505 | return; /* ... may scroll next time */
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506 | }
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507 |
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508 | if (ctcsw) /* if we haven't scrolled yet ... */
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509 | bgncm(); /* ... setup for scrolling */
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510 |
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511 | if (tag < 0) { /* scroll up */
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512 |
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513 | if (0 EQ findnxt(ptecpos))
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514 | return;
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515 |
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516 | PdScUpF = TRUE;
|
---|
517 | PdScDnF = FALSE;
|
---|
518 | smscrl();
|
---|
519 |
|
---|
520 | } else if (tag > 0) { /* scroll down */
|
---|
521 |
|
---|
522 | if (0 EQ findprv(ptecpos))
|
---|
523 | return;
|
---|
524 |
|
---|
525 | PdScDnF = TRUE;
|
---|
526 | PdScUpF = FALSE;
|
---|
527 | smscrl();
|
---|
528 | }
|
---|
529 | }
|
---|
530 |
|
---|
531 | /* |
---|
532 |
|
---|
533 | */
|
---|
534 |
|
---|
535 | /*
|
---|
536 | =============================================================================
|
---|
537 | smyupd() -- patch display smooth scroll Y axis update
|
---|
538 | =============================================================================
|
---|
539 | */
|
---|
540 |
|
---|
541 | void smyupd(void)
|
---|
542 | {
|
---|
543 | if (submenu) {
|
---|
544 |
|
---|
545 | vtcrow = YTOR(vtyval += cyrate);
|
---|
546 |
|
---|
547 | if (vtcrow > 23)
|
---|
548 | vtyval = RTOY(vtcrow = 23);
|
---|
549 | else if (vtcrow < 19)
|
---|
550 | vtyval = RTOY(vtcrow = 19);
|
---|
551 |
|
---|
552 | }
|
---|
553 |
|
---|
554 | #if OLDSCRL
|
---|
555 | smy_up(cyrate);
|
---|
556 | #endif
|
---|
557 | }
|
---|
558 |
|
---|
559 | /* |
---|
560 |
|
---|
561 | */
|
---|
562 |
|
---|
563 | /*
|
---|
564 | =============================================================================
|
---|
565 | sqy_up() -- sequence smooth scrolling
|
---|
566 | =============================================================================
|
---|
567 | */
|
---|
568 |
|
---|
569 | void sqy_up(int16_t tag)
|
---|
570 | {
|
---|
571 | if (ctcsw)
|
---|
572 | ctcoff();
|
---|
573 |
|
---|
574 | if (tag < 0) { /* scroll up */
|
---|
575 |
|
---|
576 | PdScUpF = TRUE;
|
---|
577 | PdScDnF = FALSE;
|
---|
578 | smscrl();
|
---|
579 |
|
---|
580 | } else if (tag > 0) { /* scroll down */
|
---|
581 |
|
---|
582 | PdScDnF = TRUE;
|
---|
583 | PdScUpF = FALSE;
|
---|
584 | smscrl();
|
---|
585 | }
|
---|
586 | }
|
---|
587 |
|
---|
588 | /* |
---|
589 |
|
---|
590 | */
|
---|
591 |
|
---|
592 | /*
|
---|
593 | =============================================================================
|
---|
594 | sqyupd() -- sequence smooth scroll Y axis update
|
---|
595 | =============================================================================
|
---|
596 | */
|
---|
597 |
|
---|
598 | void sqyupd(void)
|
---|
599 | {
|
---|
600 | if (submenu) {
|
---|
601 |
|
---|
602 | vtcrow = YTOR(vtyval += cyrate);
|
---|
603 |
|
---|
604 | if (vtcrow > 23)
|
---|
605 | vtyval = RTOY(vtcrow = 23);
|
---|
606 | else if (vtcrow < 19)
|
---|
607 | vtyval = RTOY(vtcrow = 19);
|
---|
608 |
|
---|
609 | }
|
---|
610 |
|
---|
611 | #if OLDSCRL
|
---|
612 | sqy_up(cyrate);
|
---|
613 | #endif
|
---|
614 | }
|
---|
615 |
|
---|