/
rldraww.a
630 lines (597 loc) · 10.3 KB
/
rldraww.a
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
;**********************************************************************
;* *
;* P R O J E C T : REALITY_ENGINE *
;* *
;* ENGINE WALL DRAW MODULE *
;* *
;**********************************************************************
include rage.i
include rle.i
include gsumac.i
public _RLDrawWallsA
public _RLDrawWallsB
public _RLDrawWallsC
public _RLDrawWalls
SECTION ENGINE_GSUCODE
cpu sfx
;
; * * * * * * * REALITY_ENGINE DRAW WALLS * * * * * * *
;
; In LOW-Detail mode, each 2-pixels wide are from a single WALL PLOT
; Strip.
;
rStripCount equ r3 ; #Strips to Draw
rColourMapB equ r4 ; Bank of ColourMap Data
rColourMap equ r5 ; ColourMap
;
rPixScaleF equ r6 ; SCN->RL Scale Fraction
rPixScale equ r7 ; SCN->RL Scale Integer
;
rWallF equ r8 ; SCN->RL Wall Fraction
rWall equ r9 ; Pointer to WallTextureData
rWallB equ r10 ; Bank of WallTextureData
;
rPlotDataPtr equ r11 ; Ptr within Current WallPlotData
rPixelCount equ r13 ; Pixel SkipCount/RepeatCount
align 16,(_RLDrawWallsC-_RLDrawWallsLowAlign)&$0f
_RLDrawWallsC
move r2,#<_RLDrawFloorsC
bra _RLDrawWalls
nop
_RLDrawWallsB
move r2,#<_RLDrawFloorsB
bra _RLDrawWalls
nop
_RLDrawWallsA
move r2,#<_RLDrawFloorsA
_RLDrawWalls
move (<RLNextCode),r2 ; Save address of Next Code Jump
move rColourMapB,#^RLColourMaps ; Bank of ColourMap Data
;
ifn useCHECKWALLPLOTDATA
move r2,#0
endif
;
; * * * * * * * DRAW WALLS IN LOW DETAIL * * * * * * *
;
_RLDrawWallsLow
move r0,#<(_RLWallPlots-2) ; WALL PLOT DATA START
move (<DWPlotPtr),r0
move r1,#((RLViewPixX/3)*0)-2 ; X Coordinate
move rStripCount,#(RLViewPixX/3/2)+1 ; #Wall Strips to Draw
;
CACHEB _RLDrawWallsLow
_RLDrawWallsLowAlign
;
; >>> DO NEXT PIXELSTRIP <<<
;
_DWL1000
move rPlotDataPtr,(<DWPlotPtr) ; Get WallPlotDataPtr
inc rPlotDataPtr ; Move to Next WallPlotDataPtr
inc rPlotDataPtr
from rPlotDataPtr ; Save Updated WallPlotDataPtr
sbk
inc r1 ; Move to next PixelStrip's X Coordinate
dec rStripCount ; One less strip to do
beq _DWL1200 ; No More Left!
inc r1 ; Move to next PixelStrip's X Coordinate
;
from r1 ; Starting of PixelBlock?
; to r0
and #7
beq _DWL1100 ; No
iwt r15,#<_DWL9000+1
; to r0 ; Get Next WallPlotPtr
ldw (rPlotDataPtr)
_DWL1100
; iwt r15,#<_DWL9500+1
dc.w <(_DWL9500+1)
; to r0 ; Get Next WallPlotPtr
ldw (rPlotDataPtr)
;
_DWL1200
move r0,(<RLNextCode) ; Begin Execution of Next Code
ibt r8,#^_RLDrawFloorsA
ife PROFILE
ljmp r8
endif
ifn PROFILE
stop
endif
nop
;
; >>> ADJUST FOR IMAGE OFFSET <<<
;
_DWL3200
getb ; <REPEAT>/<UNIQUE>?
_DWL3220
; with r0
sex
bmi _DWL3600 ; <REPEAT>
inc r14
;
; >>> UNIQUE <<<
;
with r14
add r0
with rPixelCount
sub r0
dec rPixelCount
bpl _DWL3200
inc rPixelCount
beq _DWL4100
with rPixelCount
not
inc rPixelCount
with r14
bra _DWL4400
sub rPixelCount
;
; >>> REPEAT <<<
;
_DWL3600
inc r14
with rPixelCount ; PixelCount += -RepeatCount
add r0
dec rPixelCount
bpl _DWL3200
inc rPixelCount
bne _DWL5200 ; <REPEAT> RUNNING
;
; >>> STRIP PIXEL SLOW <<<
;
_DWL4100
nop ; @FLUSH WITH IN PIPELINE@
_DWL4200
getb ; <REPEAT>/<UNIQUE>?
inc r14
; from r0 ; UniqueCount/RepeatCount
to rPixelCount
sex
bmi _DWL5400+1 ; <REPEAT>
;
; >>> UNIQUE <<<
;
_DWL4400
move rWall,r14
from rColourMapB
romb
getb ; Get Colour
; from r0
to r14
add rColourMap
from rWallB
romb
getc
_DWL4600
plot ; Draw the PixelBlock
plot
dec r1 ; Move back to correct X Coordinate
dec r12 ; One less ScreenPixel to Draw
beq _DWL9000
dec r1
with rWallF ; Move to next Pixel
add rPixScaleF
from rPixScale
; to r0
adc #0
beq _DWL4600
dec r2 ; Move to next Y Coordinate
; from r0
to r14
add rWall
with rPixelCount
sub r0
dec rPixelCount
bpl _DWL4400
inc rPixelCount
;
; >>> UNIQUE DONE <<<
;
beq _DWL4100
with rPixelCount
not
inc rPixelCount
with r14
bra _DWL3200
sub rPixelCount
;
; >>> REPEAT <<<
;
_DWL5200
dec r14
_DWL5400
move rWall,r14
from rColourMapB
romb
getb ; Get Colour
; from r0
to r14
add rColourMap
inc rWall
from rWallB
romb
getc
move r14,rWall
_DWL5600
plot ; Draw the PixelBlock
plot
dec r1 ; Move back to correct X Coordinate
dec r12 ; One less ScreenPixel to Draw
beq _DWL9000
dec r1
with rWallF ; Move to next Pixel
add rPixScaleF
from rPixScale
; to r0
adc #0
beq _DWL5600
dec r2 ; Move to next Y Coordinate
with rPixelCount
add r0
bmi _DWL5600
nop
;
; >>> REPEAT DONE <<<
;
beq _DWL4200
getb ; <REPEAT>/<UNIQUE>?
iwt r15,#<_DWL3220+1
; with r0
sex
;
; * * * * * * * NEXT STRIP * * * * * * *
;
_DWL9090
iwt r15,#<_DWL1000 ; Next PixelStrip!
nop
;
; * * * * * * * NEXT STRIP FAST * * * * * * *
;
_DWL9000
; to r0 ; Get Next WallPlotPtr
ldw (rPlotDataPtr)
ifn useCHECKWALLPLOTDATA
inc r2 ; Error with WallPlotData?
bpl .0
HALTGSU #$11 ; YES!
.0
endif
moves rPlotDataPtr,r0 ; Any Next?
beq _DWL9090 ; No!
; to r0 ; Get #Pixels To Draw / ColourMap
ldw (rPlotDataPtr)
inc rPlotDataPtr
inc rPlotDataPtr
;
; from r0 ; #Pixels To Draw
to r12
lob
ifn useCHECKWALLPLOTDATA
bne .1 ; Error with WallPlotData?
HALTGSU #$12 ; YES!
.1
endif
; with r0 ; Get HighByte of ColourMap
hib
; from r0
to rColourMap
swap
;
; to r0 ; Get Scaling Value
ldw (rPlotDataPtr)
; from r0
to rPixScale
hib
; with r0
lob
; from r0
to rPixScaleF
swap
;
inc rPlotDataPtr
inc rPlotDataPtr
;
; to r0 ; Starting Y Coordinate / Bank of PixelData
ldw (rPlotDataPtr)
inc rPlotDataPtr
inc rPlotDataPtr
;
; from r0 ; Get Starting Y Coordinate
to r2
lob
; with r0 ; Get Bank of PixelData
hib
romb
move rWallB,r0
;
ifn useCHECKWALLPLOTDATA
move r0,#(RLViewPixY-1)
; with r0
sub r2
bge .3
HALTGSU #$13
.3
endif
to r14 ; Get Address of PixelData
ldw (rPlotDataPtr)
inc rPlotDataPtr
inc rPlotDataPtr
;
; to r0 ; Get WallFraction
ldw (rPlotDataPtr)
; from r0
to rWallF
lob
with rWallF
swap
;
with rPlotDataPtr ; Move to next WallPlot
add #(plwNext-plwWallF)
;
; >>> STRIP PIXEL SLOW <<<
;
; from r0 ; Any ImageOffset?
to rPixelCount
hib
bne _DWL9200+1 ; Yes!
iwt r15,#<_DWL4200+1
getb ; <REPEAT>/<UNIQUE>?
_DWL9200
iwt r15,#<_DWL3200+1
getb ; <REPEAT>/<UNIQUE>?
;
; >>> ADJUST FOR IMAGE OFFSET <<<
;
_DWL6200
getb ; <REPEAT>/<UNIQUE>?
_DWL6220
; with r0
sex
bmi _DWL6600 ; <REPEAT>
inc r14
;
; >>> UNIQUE <<<
;
with r14
add r0
with rPixelCount
sub r0
dec rPixelCount
bpl _DWL6200
inc rPixelCount
beq _DWL7100
with rPixelCount
not
inc rPixelCount
with r14
bra _DWL7400
sub rPixelCount
;
; >>> REPEAT <<<
;
_DWL6600
inc r14
with rPixelCount ; PixelCount += -RepeatCount
add r0
dec rPixelCount
bpl _DWL6200
inc rPixelCount
bne _DWL8200 ; <REPEAT> RUNNING
;
; >>> STRIP PIXEL SLOW <<<
;
_DWL7100
nop ; @FLUSH WITH IN PIPELINE@
_DWL7200
getb ; <REPEAT>/<UNIQUE>?
inc r14
; from r0 ; UniqueCount/RepeatCount
to rPixelCount
sex
bmi _DWL8400+1 ; <REPEAT>
;
; >>> UNIQUE <<<
;
_DWL7400
move rWall,r14
from rColourMapB
romb
getb ; Get Colour
; from r0
to r14
add rColourMap
from rWallB
romb
getc
_DWL7600
plot ; Draw the PixelBlock
plot
plot
plot
plot
plot
plot
plot
with r1 ; Move back to correct X Coordinate
sub #8
dec r12 ; One less ScreenPixel to Draw
with rWallF ; Move to next Pixel
beq _DWL9500
add rPixScaleF
from rPixScale
; to r0
adc #0
beq _DWL7600
dec r2 ; Move to next Y Coordinate
; from r0
to r14
add rWall
with rPixelCount
sub r0
dec rPixelCount
bpl _DWL7400
inc rPixelCount
;
; >>> UNIQUE DONE <<<
;
beq _DWL7100
with rPixelCount
not
inc rPixelCount
with r14
bra _DWL6200
sub rPixelCount
;
; >>> REPEAT <<<
;
_DWL8200
dec r14
_DWL8400
move rWall,r14
from rColourMapB
romb
getb ; Get Colour
; from r0
to r14
add rColourMap
inc rWall
from rWallB
romb
getc
move r14,rWall
_DWL8600
plot ; Draw the PixelBlock
plot
plot
plot
plot
plot
plot
plot
with r1 ; Move back to correct X Coordinate
sub #8
dec r12 ; One less ScreenPixel to Draw
with rWallF ; Move to next Pixel
beq _DWL9500
add rPixScaleF
from rPixScale
; to r0
adc #0
beq _DWL8600
dec r2 ; Move to next Y Coordinate
with rPixelCount
add r0
bmi _DWL8600
nop
;
; >>> REPEAT DONE <<<
;
beq _DWL7200
getb ; <REPEAT>/<UNIQUE>?
iwt r15,#<_DWL6220+1
; with r0
sex
;
; * * * * * * * NEXT STRIP * * * * * * *
;
_DWL9590
iwt r15,#<_DWL1000 ; Next PixelStrip!
nop
;
; * * * * * * * NEXT STRIP FAST * * * * * * *
;
_DWL9500
; to r0 ; Get Next WallPlotPtr
ldw (rPlotDataPtr)
ifn useCHECKWALLPLOTDATA
inc r2 ; Error with WallPlotData?
bpl .0
HALTGSU #$19 ; YES!
.0
endif
;
moves rPlotDataPtr,r0 ; Any Next?
beq _DWL9590 ; No!
; to r0 ; Get #Pixels To Draw / ColourMap
ldw (rPlotDataPtr)
inc rPlotDataPtr
inc rPlotDataPtr
;
; from r0 ; #Pixels To Draw
to r12
lob
ifn useCHECKWALLPLOTDATA
bne .1 ; Error with WallPlotData?
HALTGSU #$1A ; YES!
.1
endif
; with r0 ; Get HighByte of ColourMap
hib
; from r0
to rColourMap
swap
;
; to r0 ; Get Scaling Value
ldw (rPlotDataPtr)
; from r0
to rPixScale
hib
; with r0
lob
; from r0
to rPixScaleF
swap
;
inc rPlotDataPtr
inc rPlotDataPtr
;
; to r0 ; Starting Y Coordinate / Bank of PixelData
ldw (rPlotDataPtr)
inc rPlotDataPtr
inc rPlotDataPtr
;
; from r0 ; Get Starting Y Coordinate
to r2
lob
; with r0 ; Get Bank of PixelData
hib
romb
move rWallB,r0
;
ifn useCHECKWALLPLOTDATA
move r0,#(RLViewPixY-1)
; with r0
sub r2
bge .3
HALTGSU #$1B
.3
endif
to r14 ; Get Address of PixelData
ldw (rPlotDataPtr)
inc rPlotDataPtr
inc rPlotDataPtr
;
; to r0 ; Get WallFraction
ldw (rPlotDataPtr)
; from r0
to rWallF
lob
with rWallF
swap
;
with rPlotDataPtr ; Move to next WallPlot
add #(plwNext-plwWallF)
;
; >>> STRIP PIXEL FAST <<<
;
; from r0 ; Any ImageOffset?
to rPixelCount
hib
bne _DWL9600+1 ; Yes!
iwt r15,#<_DWL7200+1
getb ; <REPEAT>/<UNIQUE>?
_DWL9600
iwt r15,#<_DWL6200+1
getb ; <REPEAT>/<UNIQUE>?
CACHEE _RLDrawWallsLow