source: buchla-68k/ram/vtyper.c

Last change on this file was a3c602f, checked in by Thomas Lopatic <thomas@…>, 7 years ago

Fixed vtyper.c.
  • Property mode set to 100644
File size: 6.0 KB
Line 
1/*
2 =============================================================================
3 vtyper.c -- virtual typewriter support functions
4 Version 8 -- 1989-11-14 -- D.N. Lynx Crowe
5 =============================================================================
6*/
7
8#include "ram.h"
9
10/* virtual typewriter display line constants */
11
12/* "123456789012345678901234567890" */
13int8_t vtlin1[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ | "; /* top */
14int8_t vtlin2[] = "abcdefghijklmnopqrstuvwxyz -*-"; /* center */
15int8_t vtlin3[] = " 0123456789+-/#().,:;!?&<> | "; /* bottom */
16
17/*
18 =============================================================================
19 vtsetup() -- setup the virtual typewriter for data entry
20
21 This sets up the parameters for the virtual typewriter:
22
23 obj VSDD display object pointer
24 dsp character display function
25 col data entry area -- leftmost column on the screen
26 ptr data string base pointer
27 tr typewriter window topmost row
28 tc typewriter window leftmost column
29 adv data entry cursor advance function
30 bsp data entry cursor backspace function
31 cup data entry cursor up function
32 cdn data entry cursor down function
33 stop virtual typewriter end function
34 fg data entry text foreground color
35 bg data entry text background color
36 =============================================================================
37*/
38
39void vtsetup(volatile uint16_t *obj, vtchar dsp, int16_t col, int8_t *ptr, int16_t tr, int16_t tc, vtcurs adv, vtcurs bsp, vtcurs cup, vtcurs cdn, vtcurs stop, int16_t fg, int16_t bg)
40{
41 vtobj = obj; /* setup object pointer */
42 vt_adv = adv; /* setup cursor advance function pointer */
43 vt_bsp = bsp; /* setup cursor backspace function pointer */
44 vt_cup = cup; /* setup cursor up function pointer */
45 vt_cdn = cdn; /* setup cursor down function pointer */
46 vt_dsp = dsp; /* setup display function pointer */
47 vt_stop = stop; /* setup exit typewriter function pointer */
48 vtwrow = tr; /* setup typewriter window row */
49 vtwcol = tc; /* setup typewriter window column */
50 vtdecol = col; /* setup data entry base column */
51 vtdeptr = ptr; /* setup data entry area base address */
52 vtfgval = fg; /* setup foreground color value */
53 vtbgval = bg; /* setup background color value */
54 SetPri(TTCURS, TTCPRI); /* turn on the typewriter cursor */
55 vtxval = CTOX(tc); /* setup vt x value */
56 vtyval = YTOR(tr); /* setup vt y value */
57 ttcpos(tr, tc); /* position the typewriter cusor */
58}
59
60/*
61 =============================================================================
62 vtcxupd() -- update virtual typewriter cursor x value
63
64 Standard cursor x update for use when the typewriter is displayed.
65
66 Reference this in the cursor x update for the particular display
67 when the virtual typewriter is displayed.
68 =============================================================================
69*/
70
71void vtcxupd(void)
72{
73 vtccol = XTOC(vtxval += cxrate);
74
75 if (vtccol > (vtwcol + 29))
76 vtxval = CTOX(vtccol = vtwcol + 29);
77 else if (vtccol < vtwcol)
78 vtxval = CTOX(vtccol = vtwcol);
79}
80
81/*
82 =============================================================================
83 vtcyupd() -- update virtual typewriter cursor y value
84
85 Standard cursor y update for use when the typewriter is displayed.
86
87 Reference this in the cursor y update for the particular display
88 when the virtual typewriter is displayed.
89 =============================================================================
90*/
91
92void vtcyupd(void)
93{
94 vtcrow = YTOR(vtyval += cyrate);
95
96 if (vtcrow > (vtwrow + 2))
97 vtyval = RTOY(vtcrow = vtwrow + 2);
98 else if (vtcrow < vtwrow)
99 vtyval = RTOY(vtcrow = vtwrow);
100}
101
102/*
103 =============================================================================
104 vtdisp() -- virtual typewriter data entry display (4 bit graphics)
105
106 Standard function for virtual typewriter output to a graphic screen.
107 Assumes that the graphic object is a 4 bit per pixel object in bank 0.
108 =============================================================================
109*/
110
111void vtdisp(volatile uint16_t *obj, int16_t fg, int16_t bg, int16_t row, int16_t col, int8_t *buf)
112{
113
114 if (v_regs[5] & 0x0180)
115 vbank(0);
116
117 vcputsv(obj, 64, fg, bg, row, col, buf, 14);
118}
119
120/*
121 =============================================================================
122 vtyper() -- do data entry with the virtual typewriter
123
124 Called when enter is hit to do data entry from the select function
125 for the display. Returns TRUE if data entry occurred, FALSE otherwise.
126 =============================================================================
127*/
128
129int16_t vtyper(void)
130{
131 /* check for data entry */
132
133 if (vtccol < (vtwcol + 26)) { /* enter data */
134
135 /* convert (vtcrow, vtccol) to data entry character */
136
137 if (vtcrow EQ vtwrow)
138 vtdechr = vtlin1[vtccol - vtwcol];
139 else if (vtcrow EQ (vtwrow + 1))
140 vtdechr = vtlin2[vtccol - vtwcol];
141 else if (vtcrow EQ (vtwrow + 2))
142 vtdechr = vtlin3[vtccol - vtwcol];
143 else {
144
145 vtdechr = '*'; /* error -- bad row */
146 return(FALSE);
147 }
148
149 vtdeptr[stccol - vtdecol] = vtdechr; /* update data area */
150
151 /* update the screen */
152
153 bfs[0] = vtdechr;
154 bfs[1] = '\0';
155
156 (*vt_dsp)(vtobj, vtfgval, vtbgval, stcrow, stccol, bfs);
157
158 (*vt_adv)(); /* advance cursor */
159 return(TRUE);
160
161 /* check for exit or cursor controls */
162
163 } else if ((vtcrow EQ (vtwrow + 1))
164 AND (vtccol EQ (vtwcol + 28))) { /* exit */
165
166 objclr(TTCPRI); /* turn off typewriter cursor */
167 (*vt_stop)(); /* refresh typewriter window */
168 return(FALSE);
169
170 } else if ((vtcrow EQ vtwrow)
171 AND (vtccol EQ (vtwcol + 28))) { /* cursor up */
172
173 (*vt_cup)(); /* move cursor up a row */
174 return(FALSE);
175
176 } else if ((vtcrow EQ (vtwrow + 2))
177 AND (vtccol EQ (vtwcol + 28))) { /* cursor down */
178
179 (*vt_cdn)(); /* move cursor down a row */
180 return(FALSE);
181
182 } else if ((vtcrow EQ (vtwrow + 1))
183 AND (vtccol EQ (vtwcol + 27))) { /* cursor lft */
184
185 (*vt_bsp)(); /* move cursor left a column */
186 return(FALSE);
187
188 } else if ((vtcrow EQ (vtwrow + 1))
189 AND (vtccol EQ (vtwcol + 29))) { /* cursor rgt */
190
191 (*vt_adv)(); /* move cursor right a column */
192 return(FALSE);
193 } else
194 return(FALSE);
195}
196
197
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