source: trunk/bootcode/special/fx.asm@ 75

Last change on this file since 75 was 60, checked in by Ben Rietbroek, 10 years ago

Fixed building on Linux [v1.1.1-testing]

Of course the lowercasing broke building on Linux.
This commit fixes that.
File size: 17.4 KB
Line 
1; AiR-BOOT (c) Copyright 1998-2008 M. Kiewitz
2;
3; This file is part of AiR-BOOT
4;
5; AiR-BOOT is free software: you can redistribute it and/or modify it under
6; the terms of the GNU General Public License as published by the Free
7; Software Foundation, either version 3 of the License, or (at your option)
8; any later version.
9;
10; AiR-BOOT is distributed in the hope that it will be useful, but WITHOUT ANY
11; WARRANTY: without even the implied warranty of MERCHANTABILITY or FITNESS
12; FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
13; details.
14;
15; You should have received a copy of the GNU General Public License along with
16; AiR-BOOT. If not, see <http://www.gnu.org/licenses/>.
17;
18;---------------------------------------------------------------------------
19; AiR-BOOT / F/X
20;---------------------------------------------------------------------------
21
22IFDEF MODULE_NAMES
23DB 'FX',0
24ENDIF
25
26; There you go. Some nice old-school demo coder effects :)
27; If you rip this code, I will ./ your ass. =]
28
29include special/fxtables.asm
30
31FX_MaxScanLine equ 384
32FX_TotalCooperBars equ 7
33
34FX_CalculateTables Proc Near
35 ; Calculate the Cooper-Bar Color-Table -> FX_CooperColors
36 mov di, offset FX_CooperColors
37 mov ax, 000Fh ; Red
38 call FX_MakeCooperBarColors
39 mov ax, 0FF0h ; Pink
40 call FX_MakeCooperBarColors
41 mov ax, 0F0Fh ; Bright Blue
42 call FX_MakeCooperBarColors
43 mov ax, 0F00h ; Blue
44 call FX_MakeCooperBarColors
45 mov ax, 00FFh ; Yellow
46 call FX_MakeCooperBarColors
47 mov ax, 00F0h ; Green
48 call FX_MakeCooperBarColors
49 mov ax, 0FFFh ; White
50 call FX_MakeCooperBarColors
51 ret
52FX_CalculateTables EndP
53
54; This routine will dump a color-table to ES:es:[DI]. Total of 96 bytes.
55; In: AX - Color-Separator (RGB, per value 4 bit)
56; DI - Pointer to Buffer for Color-Table
57; Out: *none*
58; Destroyed: DI - updated, +96
59FX_MakeCooperBarColors Proc Near
60 mov bh, ah
61 shl bh, 4
62 or bh, ah ; BH - Blue-Value, now 00h or FFh
63 mov dh, al
64 mov bl, al
65 shr dh, 4
66 and bl, 0F0h
67 or dh, bl ; DH - Green-Value, now 00h or FFh
68 mov dl, al
69 and al, 00Fh
70 shl dl, 4
71 or dl, al ; DL - Red-Value, now 00h or FFh
72 mov ax, 1111h
73 mov bl, 11h ; Start-Values
74 mov cx, 15
75 FX_MCBC_BuildColorLoop1:
76 add ax, 0303h
77 add bl, 03h
78 and ax, dx
79 and bl, bh
80 mov es:[di], ax
81 mov es:[di+2], bl
82 add di, 3
83 loop FX_MCBC_BuildColorLoop1
84 push ax
85 push bx
86 add ax, 0101h
87 add bl, 01h
88 and ax, dx
89 and bl, bh
90 mov es:[di], ax
91 mov es:[di+2], bl
92 mov es:[di+3], ax
93 mov es:[di+5], bl
94 add di, 6
95 pop bx
96 pop ax
97 mov cx, 15
98 FX_MCBC_BuildColorLoop2:
99 and ax, dx
100 and bl, bh
101 mov es:[di], ax
102 mov es:[di+2], bl
103 add di, 3
104 sub ax, 0303h
105 sub bl, 03h
106 loop FX_MCBC_BuildColorLoop2
107 ret
108FX_MakeCooperBarColors EndP
109
110; This is called just before a new screen is generated
111; If FX is active, we will modify the base segment for videoio to page 2,
112; so the screen will be generated there instead of the current page.
113FX_StartScreen Proc Near
114 test byte ptr [CFG_CooperBars], 1
115 jz FXSS_NoFX
116 mov word ptr [VideoIO_Segment], VideoIO_Page2
117 FXSS_NoFX:
118 ret
119FX_StartScreen EndP
120
121; This is called, when a new screen was done
122; If FX is active, we will copy the new screen to scroll area, do the FX,
123; copy the new screen to Page 0 and activate it.
124FX_EndScreenLeft Proc Near
125 test byte ptr [CFG_CooperBars], 1
126 jnz FXESL_Go
127 ret
128 FXESL_Go:
129 pusha
130 mov ax, VideoIO_Page2
131 mov bx, VideoIO_Page0
132 mov dx, 160
133 xor di, di
134 call FX_InterleaveCopy
135 call FX_ScrollScreenLeft
136
137 mov ax, VideoIO_Page2
138 call VideoIO_RestoreFrom
139 mov word ptr [VideoIO_Segment], VideoIO_Page0
140 call FX_EndScreenInternalCleanUp
141 popa
142 ret
143FX_EndScreenLeft EndP
144
145FX_ScrollScreenLeft Proc Near
146 mov word ptr [FX_WideScrollerCurPos], 640
147 mov byte ptr [FX_WideScrollerDirection], 0
148 mov byte ptr [FX_WideScrollerAbsDirection], 0
149 call FX_EndScreenInternalGo
150 ret
151FX_ScrollScreenLeft EndP
152
153FX_EndScreenRight Proc Near
154 test byte ptr [CFG_CooperBars], 1
155 jnz FXESR_Go
156 ret
157 FXESR_Go:
158 pusha
159 mov ax, VideoIO_Page0
160 mov bx, VideoIO_Page2
161 mov dx, 160
162 xor di, di
163 call FX_InterleaveCopy
164 call FX_ScrollScreenRight
165
166 mov ax, VideoIO_Page2
167 call VideoIO_RestoreFrom
168 mov word ptr [VideoIO_Segment], VideoIO_Page0
169 call FX_EndScreenInternalCleanUp
170 popa
171 ret
172FX_EndScreenRight EndP
173
174FX_ScrollScreenRight Proc Near
175 mov word ptr [FX_WideScrollerCurPos], 0
176 mov byte ptr [FX_WideScrollerDirection], 1
177 mov byte ptr [FX_WideScrollerAbsDirection], 1
178 call FX_EndScreenInternalGo
179 ret
180FX_ScrollScreenRight EndP
181
182FX_EndScreenInternalGo Proc Near
183 mov byte ptr [FX_WideScrollerSpeed], 1
184 mov byte ptr [FX_WideScrollerSpeedState], 1
185 mov byte ptr [FX_WideScrollerBounceSpeed], 25
186 ; Check, if this is 1st time call...
187 inc word ptr [FX_UseCount]
188 cmp word ptr [FX_UseCount], 1
189 jne FX_ES_NotFirstTime
190 mov word ptr [FX_OverallTimer], 220
191 mov word ptr [FX_WideScrollerTimer], 93
192 mov word ptr [FX_CooperBarsTimer], 1
193 jmp FX_ES_NowGoMagic
194 FX_ES_NotFirstTime:
195 mov word ptr [FX_OverallTimer], 127
196 mov word ptr [FX_WideScrollerTimer], 1
197 mov word ptr [FX_CooperBarsTimer], -1 ; Disable coopers on further goes
198 FX_ES_NowGoMagic:
199 call FX_MakeMagicalStuff
200 ret
201FX_EndScreenInternalGo EndP
202
203FX_EndScreenInternalCleanUp Proc Near
204 mov ax, -1
205 call FX_SetVideoStart
206 call FX_WaitRetrace
207 mov ax, 80
208 call FX_SetWideLength
209 ret
210FX_EndScreenInternalCleanUp EndP
211
212; In: AX - 1st Page Segment
213; BX - 2nd Page Segment
214; DX - Space to interleave
215; DI - Destination offset for Page 4
216; Out: Both pages interleaved to Page 4
217; Destroyed: AX, CX, SI, DI
218FX_InterleaveCopy Proc Near
219 push di
220 call FX_InterleaveCopyPage
221 pop di
222 add di, dx
223 mov ax, bx
224 call FX_InterleaveCopyPage
225 ret
226FX_InterleaveCopy EndP
227
228FX_InterleaveCopyPage Proc Near Uses ds es
229 mov ds, ax
230 mov ax, VideoIO_Page4
231 mov es, ax
232 xor si, si
233 FXIC_CopyLoop:
234 mov cx, 80
235 rep movsw
236 add di, dx
237 cmp si, 1000h
238 jb FXIC_CopyLoop
239 ret
240FX_InterleaveCopyPage EndP
241
242FX_MakeMagicalStuff Proc Near Uses es
243 ; Initiate Cooper-Variables...
244 push ds
245 pop es
246 mov di, offset FX_CooperState
247 mov cx, 7
248 xor al, al
249 rep stosb ; Initiates FX_CooperState
250 mov cx, 7
251 dec al ; AX = 255
252 rep stosb ; Initiates FX_SinusPos
253 mov si, offset FX_StartCooperPos
254 mov cx, 7
255 rep movsw ; Initiates FX_CooperPos
256
257 call FX_WaitRetrace
258 FX_MMS_RetraceLoop:
259 mov dx, 3C8h
260 xor al, al
261 out dx, al
262 inc dx
263 out dx, al
264 out dx, al
265 call FX_WaitRetrace
266 mov dx, 3C9h
267 xor al, al
268 out dx, al ; Really set background color now
269
270 xor di, di ; DI - Cur Scan-Line Counter
271 FX_MCS_VerticalLoop:
272 call FX_ColorUpVLine
273 inc di
274 cmp di, FX_MaxScanLine
275 jb FX_MCS_VerticalLoop
276
277 mov ax, [FX_CooperBarsTimer]
278 dec ax
279 jnz FX_MMS_CooperBarsPending
280 ; Here we need to calculate the movements of the Coopers...at last
281 call FX_CalculateCoopers
282 mov ax, 1
283 FX_MMS_CooperBarsPending:
284 mov [FX_CooperBarsTimer], ax
285
286 mov ax, [FX_WideScrollerTimer]
287 dec ax
288 jnz FX_MMS_WideScrollerPending
289 call FX_CalculateWideScroller
290 mov ax, 1
291 FX_MMS_WideScrollerPending:
292 mov [FX_WideScrollerTimer], ax
293
294 dec word ptr [FX_OverallTimer]
295 jnz FX_MMS_RetraceLoop
296 ret
297FX_MakeMagicalStuff EndP
298
299; This routine is called per VRetrace, it will look for a CooperBar to display
300; and color the Vertical Screen Line in the specified color
301; In: DI - Vertical Line Counter
302; Out: *none*
303; Destroyed: all, but DI
304FX_ColorUpVLine Proc Near Uses di
305 add di, 256 ; Real-Scanlines begin at 256 here
306 mov si, offset FX_CooperPos
307 xor cx, cx
308 FX_CUVL_SearchCooperLoop:
309 lodsw
310 mov dx, ax ; AX - First VRLine used by Cooper
311 add dx, 32 ; DX - Last VRLine used by Cooper
312 cmp di, ax
313 jb FX_CUVL_CooperNoHit
314 cmp di, dx
315 jb FX_CUVL_CooperGotHit
316 FX_CUVL_CooperNoHit:
317 inc cx
318 cmp cx, FX_TotalCooperBars
319 jb FX_CUVL_SearchCooperLoop
320 FX_CUVL_CooperNotVisible:
321 xor bx, bx
322 xor cl, cl ; No Cooper -> So use Color [0/0/0]
323 jmp FX_CUVL_ColorLine
324
325 ; Okay, we got a cooper...now calculate color and done...
326 FX_CUVL_CooperGotHit:
327 mov dx, di
328 sub dx, ax ; DX - Relative Pos within cooper
329 mov bx, cx
330 shl bx, 5 ; * 32
331 mov ax, bx
332 add bx, bx
333 add bx, ax ; BX = CurCooper*96
334 add bx, dx
335 add bx, dx
336 add bx, dx ; Plus RelativePos * 3
337 mov cl, bptr ds:[FX_CooperColors+bx+2]
338 mov bx, wptr ds:[FX_CooperColors+bx]
339
340 FX_CUVL_ColorLine:
341 mov dx, 3C8h
342 xor al, al
343 out dx, al
344 inc dx
345 mov al, bl
346 out dx, al
347 mov al, bh
348 out dx, al
349 call FX_WaitVRetrace
350 mov dx, 3C9h
351 mov al, cl
352 out dx, al ; Colord on VRetrace...
353 ret
354FX_ColorUpVLine EndP
355
356; This routine is called to move the cooper bars on screen... It's called on
357; every Retrace.
358; In: *none*
359; Out: *none*
360; Destroyed: all
361FX_CalculateCoopers Proc Near
362 ; Logic: When Intro-State: Increase CooperPos by 1 till 256 -> then active
363 ; Active-State: Use SinusTable, till SinusPos=7Fh -> then Extro
364 ; Extro-State: Decrease CooperPos by 1 till 0
365
366 xor si, si
367 FX_CC_CalcLoop:
368 cmp bptr ds:[FX_CooperState+si], 1
369 jb FX_CC_IntroState
370 je FX_CC_ActiveState
371 ja FX_CC_ExtroState
372 jmp FX_CC_CalcLoopEnd
373 FX_CC_IntroState:
374 mov bx, si
375 shl bx, 1
376 mov ax, wptr ds:[FX_CooperPos+bx]
377 inc ax
378 mov wptr ds:[FX_CooperPos+bx], ax
379 cmp ax, 256 ; Got into Active-State ?
380 jb FX_CC_CalcLoopEnd
381 inc bptr ds:[FX_CooperState+si]
382 jmp FX_CC_CalcLoopEnd
383 FX_CC_ExtroState:
384 mov bx, si
385 shl bx, 1
386 mov ax, wptr ds:[FX_CooperPos+bx]
387 dec ax
388 jz FX_CC_CalcLoopEnd
389 mov wptr ds:[FX_CooperPos+bx], ax
390 jmp FX_CC_CalcLoopEnd
391
392 FX_CC_ActiveState:
393 ; increment SinusPos by 1
394 ;movzx bx, bptr ds:[FX_SinusPos+si]
395 mov bl,bptr ds:[FX_SinusPos+si]
396 mov bh,0
397
398 inc bx
399 mov bptr ds:[FX_SinusPos+si], bl
400 cmp bl, 7Fh
401 jne FX_CC_ActiveNoStateChange
402 inc bptr ds:[FX_CooperState+si]
403 FX_CC_ActiveNoStateChange:
404 ; Get SinusTab-Value for [BX] and put it to CooperPos-Table for easy xs
405 and bx, 7Fh
406 shl bx, 1
407 mov ax, wptr es:[FX_SinusTab+bx]
408 mov bx, si
409 shl bx, 1
410 mov wptr ds:[FX_CooperPos+bx], ax
411 FX_CC_CalcLoopEnd:
412 inc si
413 cmp si, FX_TotalCooperBars
414 jb FX_CC_CalcLoop
415 ret
416FX_CalculateCoopers EndP
417
418FX_CalculateWideScroller Proc Near
419 mov bx, [FX_WideScrollerCurPos]
420 ;movzx cx, FX_WideScrollerSpeed
421 mov cl, [FX_WideScrollerSpeed]
422 mov ch,0
423
424 test byte ptr [FX_WideScrollerAbsDirection], 1
425 jnz FXCWS_RIGHT
426 jmp FXCWS_LEFT
427
428 ; ================================================== WideScroll: LEFT CALC
429 FXCWS_LEFT:
430 test byte ptr [FX_WideScrollerSpeedState], 1
431 jz FXCWS_LEFT_Bouncing
432 or bx, bx
433 jz FXCWS_LEFT_BounceNOW
434 jmp FXCWS_DoSpeedThing
435
436 FXCWS_LEFT_Bouncing:
437 or cx, cx
438 jnz FXCWS_DoSpeedThing
439 mov byte ptr [FX_WideScrollerSpeedState], 1
440 mov byte ptr [FX_WideScrollerDirection], 0
441 mov dl, [FX_WideScrollerBounceSpeed]
442 shr dl,1
443 mov [FX_WideScrollerBounceSpeed], dl
444 jmp FXCWS_DoSpeedThing
445
446 FXCWS_LEFT_BounceNOW:
447 mov cl, [FX_WideScrollerBounceSpeed]
448 mov byte ptr [FX_WideScrollerSpeedState], 0
449 mov byte ptr [FX_WideScrollerDirection], 1
450 jmp FXCWS_DoSpeedThing
451
452 ; ================================================= WideScroll: RIGHT CALC
453 FXCWS_RIGHT:
454 test byte ptr [FX_WideScrollerSpeedState], 1
455 jz FXCWS_RIGHT_Bouncing
456 cmp bx, 640 ; 1280
457 jae FXCWS_RIGHT_BounceNOW
458 jmp FXCWS_DoSpeedThing
459
460 FXCWS_RIGHT_Bouncing:
461 or cl, cl
462 jnz FXCWS_DoSpeedThing
463 mov byte ptr [FX_WideScrollerSpeedState], 1
464 mov byte ptr [FX_WideScrollerDirection], 1
465 mov dl, [FX_WideScrollerBounceSpeed]
466 shr dl, 1
467 mov [FX_WideScrollerBounceSpeed], dl
468 jmp FXCWS_DoSpeedThing
469
470 FXCWS_RIGHT_BounceNOW:
471 mov cl, [FX_WideScrollerBounceSpeed]
472 mov byte ptr [FX_WideScrollerSpeedState], 0
473 mov byte ptr [FX_WideScrollerDirection], 0
474 jmp FXCWS_DoSpeedThing
475
476 ; ================================================= WideScroll: SPEED CALC
477 FXCWS_DoSpeedThing:
478 test byte ptr [FX_WideScrollerSpeedState], 1
479 jnz FXCWS_SpeedUp
480 FXCWS_SpeedDown:
481 or cl, cl
482 jz FXCWS_WideScrollNOW
483 dec cl
484 jmp FXCWS_WideScrollNOW
485
486 FXCWS_SpeedUp:
487 cmp cl, 25
488 jge FXCWS_WideScrollNOW
489 inc cl
490 jmp FXCWS_WideScrollNOW
491
492 ; ================================================== WideScroll: DO SCROLL
493 FXCWS_WideScrollNOW:
494 xor ch, ch
495 test byte ptr [FX_WideScrollerDirection], 1
496 jnz FXCWS_ScrollRIGHT
497 sub bx, cx
498 jmp FXCWS_Continue
499 FXCWS_ScrollRIGHT:
500 add bx, cx
501 FXCWS_Continue:
502 cmp bx, 5555h ; Zu gross <g>
503 jb FXCWS_NotToSmall
504 mov bx, 0
505 FXCWS_NotToSmall:
506 cmp bx, 640 ; 1280
507 jb FXCWS_NotToBig
508 mov bx, 640 ; 1280
509 FXCWS_NotToBig:
510 mov [FX_WideScrollerCurPos], bx
511 mov [FX_WideScrollerSpeed], cl
512 mov ax, 160
513 call FX_SetWideLength
514 mov ax, bx
515 call FX_SetVideoStart
516 ret
517FX_CalculateWideScroller EndP
518
519FX_WaitRetrace Proc Near
520 mov dx, 3DAh
521 FX_WR1:
522 in al,dx
523 test al,8
524 jnz FX_WR1
525 FX_WR2:
526 in al,dx
527 test al,8
528 jz FX_WR2
529 ret
530FX_WaitRetrace EndP
531
532FX_WaitVRetrace Proc Near
533 mov dx, 3DAh
534 FX_WVR1:
535 in al,dx
536 test al,1
537 jnz FX_WVR1
538 FX_WVR2:
539 in al,dx
540 test al,1
541 jz FX_WVR2
542 ret
543FX_WaitVRetrace EndP
544
545FX_SetVideoStart Proc Near Uses bx cx dx
546 cmp ax, -1
547 je FXSVS_Reset
548 mov bx, ax
549 mov cl, al
550 shr bx, 3
551 and cl, 7
552 add bx, 2000h ; Start at BC00h (Offset 4000h)
553 or cl, cl
554 jnz FXSVS_SetValues
555 mov cl, 31 ; BX - StartAddr, CL - ShiftReg
556 jmp FXSVS_SetValues
557 FXSVS_Reset:
558 xor bx, bx ; StartAddr==0, ShiftReg==31
559 mov cl, 31
560 FXSVS_SetValues:
561 mov dx, 3D4h
562 mov al, 0Ch
563 mov ah, bh
564 out dx, ax ; Set Start-Address
565 inc al
566 mov ah, bl
567 out dx, ax
568
569 mov dx, 3C0h
570 mov al, 33h
571 out dx, al
572 mov al, cl
573 out dx, al ; Set Shift-Register
574 ret
575FX_SetVideoStart EndP
576
577FX_SetWideLength Proc Near Uses dx
578 shr ax, 1 ; Divide by 2
579 mov ah, al
580 mov dx, 3D4h
581 mov al, 13h
582 out dx, ax
583 ret
584FX_SetWideLength EndP
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