source: buchla-68k/vlib/vobjfns.c@ 0170798

Last change on this file since 0170798 was b28a12e, checked in by Thomas Lopatic <thomas@…>, 7 years ago

Zero redundant declarations.
  • Property mode set to 100644
File size: 5.3 KB
Line 
1/*
2 =============================================================================
3 vobjfns.c -- VSDD object functions
4 Version 23 -- 1988-01-29 -- D.N. Lynx Crowe
5 (c) Copyright 1987,1988 -- D.N. Lynx Crowe
6
7 SelObj(obj)
8 int obj;
9
10 Select 'obj' as the current working object.
11
12 SetPri(obj, pri)
13 int obj, pri;
14
15 Display object 'obj' with priority 'pri'.
16
17 SetObj(obj, type, bank, base, xpix, ypix, x0, y0, flags, pri)
18 int obj, type, bank, xpix, ypix, x0, y0, flags, pri;
19 unsigned int *base;
20
21 Setup object 'obj' of type 'type' at 'base' in bank 'bank'
22 with height 'ypix' and width 'xpix' at initial location
23 'x0','y0', with flags 'flags'. Assumes HRS EQ 1.
24 If 'pri' >= 0, display the object at priority level 'pri'.
25 Define a bitmap object if 'type' EQ 0, or a character object
26 if 'type' NE 0.
27
28 CpyObj(from, to, w, h, sw)
29 unsigned int *from, *to;
30 int w, h, sw;
31
32 Copy a 'w'-word by 'h'-line object from 'from' to 'to' with
33 a destination width of 'sw' words.
34*/
35
36/*
37
38*/
39
40/*
41 VIint() is located in viint.s but is mentioned here for completeness
42
43 VIint()
44
45 Vertical Interrupt handler. Enables display of any object
46 whose bit is set in vi_ctl. Bit 0 = object 0, etc.
47
48 SetPri() uses BIOS(B_SETV, 25, VIint) to set the interrupt
49 vector and lets VIint() enable the object. If vi_dis
50 is set, SetPri() won't enable the interrupt or set the vector
51 so that several objects can be started up at once.
52 =============================================================================
53*/
54
55#include "ram.h"
56
57int16_t wsize; /* object width calculated by SetObj() */
58int16_t vi_dis; /* disable use of VIint */
59
60uint16_t vi_ctl; /* object unblank control bits */
61
62/*
63
64*/
65
66/*
67 =============================================================================
68 SelObj(obj) -- Select 'obj' as the current working object.
69 =============================================================================
70*/
71
72void SelObj(int16_t obj)
73{
74 register struct octent *op;
75 register uint16_t newbank;
76
77 op = &v_obtab[obj];
78
79 newbank = ((op->obank & 0x0001) << 8) | ((op->obank & 0x0002) << 6);
80
81 v_nobj = obj;
82 v_curob = op;
83 v_obpri = op->opri;
84
85 if ((v_regs[5] & 0x0180) NE newbank)
86 vbank(op->obank & 3);
87}
88
89/*
90
91*/
92
93/*
94 =============================================================================
95 SetPri(obj, pri) -- Display object 'obj' with priority 'pri'.
96
97 Blanks the object first, then sets the access table
98 and unblanks the object via VIint().
99 =============================================================================
100*/
101
102void SetPri(int16_t obj, int16_t pri)
103{
104 register struct octent *op;
105
106 if (v_regs[5] & 0x0180) /* point at the control bank */
107 vbank(0);
108
109 op = &v_obtab[obj]; /* point at the object table */
110 op->opri = pri; /* set the priority */
111
112 v_odtab[pri][0] = op->odtw0 | V_BLA; /* start object as blanked */
113 v_odtab[pri][1] = op->odtw1;
114 v_odtab[pri][2] = ((int32_t)op->obase >> 1) & 0xFFFF;
115
116 objon(pri, op->objy, op->ysize); /* enable access table bits */
117
118 if (vi_dis) /* don't unblank if vi_dis set */
119 return;
120
121 setipl(7); /* disable interrupts */
122
123 vi_ctl |= (1 << pri); /* set unblank bit */
124
125 if (*((int32_t *)0x000064) NE &VIint) /* make sure VI vector is set */
126 BIOS(B_SETV, 25, VIint);
127
128 setipl(0); /* enable VI interrupt */
129}
130
131/*
132
133*/
134
135/*
136 =============================================================================
137 SetObj(obj, type, bank, base, xpix, ypix, x0, y0, flags, pri)
138 Setup an object, and optionally display it. Assumes HRS EQ 1.
139 =============================================================================
140*/
141
142void SetObj(int16_t obj, int16_t type, int16_t bank, int16_t xpix, int16_t ypix, int16_t x0, int16_t y0, int16_t flags, int16_t pri, uint16_t *base)
143{
144 register struct octent *op;
145
146 if (v_regs[5] & 0x0180) /* point at the control bank */
147 vbank(0);
148
149 op = &v_obtab[obj];
150
151 v_curob = op;
152 v_nobj = obj;
153 v_obpri = pri;
154
155 op->ysize = ypix;
156 op->xsize = xpix;
157 op->objx = x0;
158 op->objy = y0;
159 op->obase = base;
160 op->opri = pri;
161 op->obank = bank & 3;
162
163/*
164
165*/
166 if (type) { /* character objects */
167
168 op->odtw0 = (flags & 0xF9FF) | V_CTYPE;
169
170 switch (V_RES3 & op->odtw0) {
171
172 case V_RES0:
173
174 wsize = xpix / 128;
175 break;
176
177 case V_RES1:
178
179 wsize = xpix / 48;
180 break;
181
182 case V_RES2:
183
184 wsize = xpix / 64;
185 break;
186
187 case V_RES3:
188
189 wsize = xpix / 96;
190 break;
191 }
192
193 if (V_FAD & op->odtw0)
194 wsize = wsize + (wsize << 1);
195
196/*
197
198*/
199 } else { /* bitmap objects */
200
201 op->odtw0 = (flags & 0x0E37) | (V_BTYPE | ((bank & 3) << 6));
202
203 switch (V_RES3 & op->odtw0) {
204
205 case V_RES0:
206 case V_RES1:
207
208 wsize = 0;
209 break;
210
211 case V_RES2:
212
213 wsize = xpix / 32;
214 break;
215
216 case V_RES3:
217
218 wsize = xpix / 16;
219 break;
220 }
221 }
222
223 op->odtw1 = ((x0 >> 1) & 0x03FF) | (0xFC00 & (wsize << 10));
224
225 if (pri < 0)
226 return;
227
228 SetPri(obj, pri);
229}
230
231/*
232
233*/
234
235/*
236 =============================================================================
237 CpyObj(from, to, w, h, sw)
238
239 Copy a 'w'-word by 'h'-line object from 'from' to 'to' with
240 a destination width of 'sw' words. Assumes we're pointing at
241 the correct bank.
242 =============================================================================
243*/
244
245void CpyObj(uint16_t *from, uint16_t *to, uint16_t w, uint16_t h, uint16_t sw)
246{
247 register uint16_t *tp;
248 register uint16_t i, j;
249
250 for (i = h; i--; ) {
251
252 tp = to;
253
254 for (j = w; j--; )
255 *tp++ = *from++;
256
257 to += sw;
258 }
259}
260
Note: See TracBrowser for help on using the repository browser.