| 1 |
|
| 2 |
;#define DUMPMASK |
| 3 |
|
| 4 |
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| 5 |
; Clears the buffer |
| 6 |
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| 7 |
|
| 8 |
clear_occ |
| 9 |
|
| 10 |
lda #HI(buffer_occ) |
| 11 |
sta tmp0+1 |
| 12 |
lda #LO(buffer_occ) |
| 13 |
sta tmp0 |
| 14 |
|
| 15 |
lda #0 |
| 16 |
sta tmp |
| 17 |
clc |
| 18 |
ldx _clip_rgn+3 |
| 19 |
dex |
| 20 |
txa |
| 21 |
#ifdef EIGTHSCANS |
| 22 |
asl |
| 23 |
rol tmp |
| 24 |
asl |
| 25 |
rol tmp |
| 26 |
asl |
| 27 |
rol tmp |
| 28 |
|
| 29 |
adc tmp0 |
| 30 |
sta tmp0 |
| 31 |
lda tmp |
| 32 |
adc tmp0+1 |
| 33 |
sta tmp0+1 |
| 34 |
|
| 35 |
#else |
| 36 |
asl |
| 37 |
sta tmp |
| 38 |
asl |
| 39 |
clc |
| 40 |
adc tmp |
| 41 |
adc tmp0 |
| 42 |
sta tmp0 |
| 43 |
bcc nocarryt4 |
| 44 |
inc tmp0+1 |
| 45 |
nocarryt4 |
| 46 |
#endif |
| 47 |
|
| 48 |
|
| 49 |
;; Pointer in tmp0 |
| 50 |
ldx _clip_rgn+3 ; get lines |
| 51 |
|
| 52 |
co_looplines |
| 53 |
lda #$40;7f |
| 54 |
ldy _clip_rgn+2 ; get scans |
| 55 |
dey |
| 56 |
co_loopscans |
| 57 |
sta (tmp0),y |
| 58 |
dey |
| 59 |
bpl co_loopscans |
| 60 |
|
| 61 |
lda tmp0 |
| 62 |
sec |
| 63 |
;sbc #8 ; Point to previous line |
| 64 |
sbc #SCANSINBUFF ; Point to previous line |
| 65 |
bcs co_no_carry |
| 66 |
dec tmp0+1 |
| 67 |
co_no_carry |
| 68 |
sta tmp0 |
| 69 |
dex |
| 70 |
bne co_looplines |
| 71 |
|
| 72 |
rts ; We're done |
| 73 |
|
| 74 |
|
| 75 |
;; End of clear_buff |
| 76 |
|
| 77 |
|
| 78 |
calc_occlusion_mask |
| 79 |
;; KLUDGE: Repaint what has been corrupted... |
| 80 |
|
| 81 |
lda double_buff |
| 82 |
bne k_cont |
| 83 |
jmp endkludge |
| 84 |
|
| 85 |
k_cont |
| 86 |
|
| 87 |
lda #1 |
| 88 |
sta in_kludge_height+1 |
| 89 |
|
| 90 |
;Save params |
| 91 |
inc sp |
| 92 |
bne k_done |
| 93 |
inc sp+1 |
| 94 |
k_done |
| 95 |
|
| 96 |
jsr clear_occ |
| 97 |
|
| 98 |
ldy iloop2 |
| 99 |
iny |
| 100 |
sty block_i |
| 101 |
ldy tiley |
| 102 |
dey |
| 103 |
sty block_j |
| 104 |
|
| 105 |
|
| 106 |
lda #0 |
| 107 |
sta block_k ; Initial heigth to start looking for objects in front |
| 108 |
|
| 109 |
|
| 110 |
#if LAYER_HEIGHT<>8 |
| 111 |
#echo WARNING: LAYER HEIGHT IS NOT 8. CHANGE KLUDGE @ OCCLUSIONS.S |
| 112 |
#endif |
| 113 |
|
| 114 |
; We have in block_i: i+1 and in block_j: j-1 |
| 115 |
|
| 116 |
k_loop1 |
| 117 |
jsr add_block_mask |
| 118 |
inc block_k |
| 119 |
lda block_k |
| 120 |
cmp #NUM_LAYERS |
| 121 |
bcc k_loop1 |
| 122 |
|
| 123 |
;; Now objects that might be on top |
| 124 |
|
| 125 |
lda sizecode ; Initialised at paint_sprites before calling here |
| 126 |
and #%00111111 |
| 127 |
tax |
| 128 |
lda _sizes_k,x |
| 129 |
asl ; Double the size... |
| 130 |
sec |
| 131 |
sbc #1 |
| 132 |
clc |
| 133 |
adc who_k |
| 134 |
lsr |
| 135 |
lsr |
| 136 |
lsr |
| 137 |
sta block_k |
| 138 |
cmp #(NUM_LAYERS-1) |
| 139 |
bcs k_noup |
| 140 |
|
| 141 |
inc block_k |
| 142 |
;inc block_j |
| 143 |
dec block_i ; We are now at (i,j-1) |
| 144 |
k_loop2 |
| 145 |
; Start at (i,j-1) |
| 146 |
jsr add_block_mask |
| 147 |
dec block_i |
| 148 |
jsr add_block_mask ; Now at (i-1,j-1) |
| 149 |
|
| 150 |
inc block_j |
| 151 |
jsr add_block_mask ; Now at (i-1, j) |
| 152 |
|
| 153 |
dec block_j |
| 154 |
inc block_i ; Back at (i,j-i) for next loop |
| 155 |
|
| 156 |
inc block_k |
| 157 |
lda block_k |
| 158 |
cmp #NUM_LAYERS |
| 159 |
bcc k_loop2 |
| 160 |
|
| 161 |
k_noup |
| 162 |
|
| 163 |
jsr add_sprites_mask |
| 164 |
|
| 165 |
lda #0 |
| 166 |
sta in_kludge_height+1 |
| 167 |
|
| 168 |
#ifdef DUMPMASK |
| 169 |
jsr dump_mask |
| 170 |
#endif |
| 171 |
|
| 172 |
nokludge |
| 173 |
;Restore sp |
| 174 |
lda sp |
| 175 |
bne k_declsp |
| 176 |
dec sp+1 |
| 177 |
k_declsp |
| 178 |
dec sp |
| 179 |
|
| 180 |
endkludge |
| 181 |
rts |
| 182 |
|
| 183 |
|
| 184 |
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| 185 |
; add_block_mask |
| 186 |
; Add a mask of a given block to the sprite mask |
| 187 |
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| 188 |
|
| 189 |
block_i .byte $00 |
| 190 |
block_j .byte $00 |
| 191 |
block_k .byte $00 |
| 192 |
block_index .byte $00 |
| 193 |
|
| 194 |
add_block_mask |
| 195 |
|
| 196 |
#if LAYER_HEIGHT<>8 |
| 197 |
#echo WARNING: LAYER HEIGHT IS NOT 8. CHANGE ADD_BLOCK_MASK @ OCCLUSIONS.S |
| 198 |
#endif |
| 199 |
; X and Y parameters for put_sprite |
| 200 |
lda block_i |
| 201 |
cmp #10 |
| 202 |
bcs abm_nothing2do |
| 203 |
sta op1 |
| 204 |
lda block_j |
| 205 |
cmp #10 |
| 206 |
bcs abm_nothing2do |
| 207 |
|
| 208 |
sta op2 |
| 209 |
jsr ij2xy |
| 210 |
tya |
| 211 |
clc |
| 212 |
adc #12 |
| 213 |
ldy #2 |
| 214 |
sta (sp),y ; store |
| 215 |
txa |
| 216 |
ldy #0 |
| 217 |
sta (sp),y ; store |
| 218 |
|
| 219 |
|
| 220 |
; Initialize heigth |
| 221 |
lda block_k |
| 222 |
asl |
| 223 |
asl |
| 224 |
asl ; Multiply by 8 |
| 225 |
sta tmp |
| 226 |
|
| 227 |
; New heigth means changing y |
| 228 |
ldy #2 |
| 229 |
lda (sp),y ; get y |
| 230 |
sec |
| 231 |
sbc tmp |
| 232 |
sta (sp),y ; store |
| 233 |
|
| 234 |
|
| 235 |
; fetch block to draw |
| 236 |
|
| 237 |
; Get the block to draw... that is i*10+j (NOT i+j*10 as it would seem BEWARE!) |
| 238 |
lda block_i |
| 239 |
asl ; i*2 |
| 240 |
sta tmp |
| 241 |
asl |
| 242 |
asl ; i*8 |
| 243 |
clc |
| 244 |
adc tmp ; i*10 |
| 245 |
clc |
| 246 |
adc block_j ; i*10+j |
| 247 |
sta block_index |
| 248 |
|
| 249 |
; Get pointer to map of current layer |
| 250 |
lda block_k |
| 251 |
asl ; double index for 16-bit entries |
| 252 |
tax |
| 253 |
lda _layers,x ; get MSB |
| 254 |
sta tmp |
| 255 |
lda _layers+1,x ; get LSB |
| 256 |
sta tmp+1 |
| 257 |
ldy block_index |
| 258 |
lda (tmp),y ; get tile |
| 259 |
and #%01111111 ; Remove SPECIAL bit |
| 260 |
beq abm_nothing2do |
| 261 |
|
| 262 |
jsr draw_block |
| 263 |
|
| 264 |
abm_nothing2do |
| 265 |
|
| 266 |
rts ; We're done |
| 267 |
|
| 268 |
|
| 269 |
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| 270 |
; add_sprites_mask |
| 271 |
; Helper funcion that searches for sprites that should |
| 272 |
; add their masks to the occlusion mask |
| 273 |
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| 274 |
|
| 275 |
as_num_sp .byte $00 |
| 276 |
|
| 277 |
add_sprites_mask |
| 278 |
lda _num_chars |
| 279 |
sta as_num_sp |
| 280 |
|
| 281 |
as_loopchars |
| 282 |
ldx as_num_sp |
| 283 |
dex |
| 284 |
lda _chars_in_room,x ; Get new object |
| 285 |
cmp cur_char ; Is it the current one? |
| 286 |
beq as_nextchar ; It is... so ignore |
| 287 |
|
| 288 |
;jmp as_nextchar |
| 289 |
|
| 290 |
asl ; Multiply by 4 (sizeof(moving_object_t)) |
| 291 |
asl |
| 292 |
tax |
| 293 |
|
| 294 |
; Should this sprite be treated for occlusions? |
| 295 |
|
| 296 |
ldy sizecode |
| 297 |
lda _sizes_i,y |
| 298 |
sta tmp |
| 299 |
lda _characters,x ; cur_sp_i+sp_width_i-sp_i-1 < 18? |
| 300 |
clc |
| 301 |
adc tmp |
| 302 |
clc ; DONE ON PURPOSE |
| 303 |
sbc who_i |
| 304 |
bmi as_nextchar |
| 305 |
cmp #18 |
| 306 |
bcs as_nextchar |
| 307 |
|
| 308 |
inx |
| 309 |
lda _sizes_j,y |
| 310 |
sta tmp |
| 311 |
lda _characters,x ; cur_sp_j+sp_width_j-sp_j-1 < 18 |
| 312 |
clc |
| 313 |
adc tmp |
| 314 |
clc ; DONE ON PURPOSE |
| 315 |
sbc who_j |
| 316 |
bmi as_nextchar |
| 317 |
cmp #18 |
| 318 |
bcs as_nextchar |
| 319 |
|
| 320 |
inx |
| 321 |
inx |
| 322 |
lda _characters,x |
| 323 |
and #%0011111 ; Get size code |
| 324 |
tay |
| 325 |
lda _sizes_k,y |
| 326 |
asl |
| 327 |
dex |
| 328 |
|
| 329 |
; inx |
| 330 |
; lda _sizes_k,y |
| 331 |
; asl |
| 332 |
adc _characters,x |
| 333 |
sec |
| 334 |
sbc #1 |
| 335 |
cmp who_k |
| 336 |
bcc as_nextchar ; The sprite is below... |
| 337 |
|
| 338 |
jsr add_this_sprite |
| 339 |
|
| 340 |
as_nextchar |
| 341 |
dec as_num_sp |
| 342 |
beq as_end |
| 343 |
jmp as_loopchars |
| 344 |
as_end |
| 345 |
rts |
| 346 |
|
| 347 |
|
| 348 |
|
| 349 |
|
| 350 |
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| 351 |
;; put_mask2(char x_pos, y_pos, sprite_t * sprite, char invert) |
| 352 |
;; Saving the mask for occlusions. No rotations. |
| 353 |
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| 354 |
put_mask2 |
| 355 |
|
| 356 |
;; Do the minimum necessary to call intersect_rect, |
| 357 |
;; so if painting is not needed we return as fast as possible |
| 358 |
|
| 359 |
#ifdef TINYNOISE |
| 360 |
jsr fetch_coords |
| 361 |
#else |
| 362 |
;; Fetch x and y coordinates |
| 363 |
ldy #0 |
| 364 |
lda(sp),y |
| 365 |
sta op1 |
| 366 |
ldy #2 |
| 367 |
lda(sp),y |
| 368 |
sta op2 |
| 369 |
|
| 370 |
ldy #4 ; Get sprite pointer |
| 371 |
lda (sp),y |
| 372 |
sta tmp2 |
| 373 |
iny |
| 374 |
lda (sp),y |
| 375 |
sta tmp2+1 |
| 376 |
|
| 377 |
ldy #0 |
| 378 |
lda (tmp2),y ; # of lines |
| 379 |
sta tmp3 |
| 380 |
iny |
| 381 |
lda (tmp2),y |
| 382 |
sta tmp3+1 ; # of scans |
| 383 |
#endif |
| 384 |
|
| 385 |
jsr intersect_rect |
| 386 |
beq pm2_cont1 |
| 387 |
rts |
| 388 |
pm2_cont1 |
| 389 |
ldy #6 ; Paint inverted |
| 390 |
lda(sp),y |
| 391 |
sta invert3+1 |
| 392 |
|
| 393 |
lda tmp3+1 |
| 394 |
sta scans_to_draw |
| 395 |
|
| 396 |
lda #0 |
| 397 |
sta scan_to_start |
| 398 |
|
| 399 |
ldy tmp3+1 ;scans |
| 400 |
dey |
| 401 |
sty tmp |
| 402 |
|
| 403 |
|
| 404 |
ldy #4 |
| 405 |
lda (tmp2),y |
| 406 |
sta tmp5 |
| 407 |
iny |
| 408 |
lda (tmp2),y |
| 409 |
sta tmp5+1 ; Pointer to sprite mask |
| 410 |
|
| 411 |
lda tmp5 |
| 412 |
sec |
| 413 |
sbc tmp |
| 414 |
bcs pm2_nocarry3 |
| 415 |
dec tmp5+1 |
| 416 |
pm2_nocarry3 |
| 417 |
sta tmp5 |
| 418 |
|
| 419 |
; Test parameter to see if we use double buffer or not... |
| 420 |
|
| 421 |
jsr adjust_clip |
| 422 |
jsr pixel_address |
| 423 |
|
| 424 |
; Adjust to buffer_occ |
| 425 |
lda tmp0 |
| 426 |
clc |
| 427 |
adc #LO(buffer_occ-scr_buffer) |
| 428 |
sta tmp0 |
| 429 |
lda tmp0+1 |
| 430 |
adc #HI(buffer_occ-scr_buffer) |
| 431 |
sta tmp0+1 |
| 432 |
|
| 433 |
;; We have in tmp1 the code of the pixel in scan |
| 434 |
;; and in tmp0 the destination address |
| 435 |
|
| 436 |
lda scan_to_start |
| 437 |
sta scan2start3+1 |
| 438 |
|
| 439 |
pm2_loop1 |
| 440 |
;; Some initializations... |
| 441 |
ldy scans_to_draw |
| 442 |
dey |
| 443 |
|
| 444 |
pm2_loop2 |
| 445 |
scan2start3 |
| 446 |
cpy #0 |
| 447 |
bmi pm2_nopaint |
| 448 |
|
| 449 |
|
| 450 |
lda (tmp0),y ; Take screen contents |
| 451 |
sta tmp |
| 452 |
|
| 453 |
invert3 |
| 454 |
lda #0 |
| 455 |
beq pm2_noinvert |
| 456 |
|
| 457 |
sty aux |
| 458 |
lda tmp3+1 |
| 459 |
clc ; DONE ON PURPOSE, BEWARE! |
| 460 |
sbc aux ; (scans-current_scan) |
| 461 |
tay |
| 462 |
|
| 463 |
lda (tmp5),y ; Get mask |
| 464 |
tax |
| 465 |
lda tab_inverted_bytes,x |
| 466 |
ora #%010000000 ; :: HAS TO BE DONE? |
| 467 |
ora tmp ; AND screen |
| 468 |
|
| 469 |
ldy aux |
| 470 |
|
| 471 |
bvc pm2_paint ; Branches allways |
| 472 |
|
| 473 |
pm2_noinvert |
| 474 |
lda (tmp5),y ; Get mask |
| 475 |
ora tmp ; AND screen |
| 476 |
|
| 477 |
pm2_paint |
| 478 |
|
| 479 |
sta (tmp0),y ; Put everything in screen |
| 480 |
|
| 481 |
pm2_nopaint |
| 482 |
dey |
| 483 |
bpl pm2_loop2 ; End of scans loop |
| 484 |
pm2_noloop2 |
| 485 |
|
| 486 |
lda tmp0 |
| 487 |
sec |
| 488 |
;sbc #8 ; Point to previous line |
| 489 |
sbc #SCANSINBUFF ; Point to previous line |
| 490 |
bcs pm2_no_carry1 |
| 491 |
dec tmp0+1 |
| 492 |
pm2_no_carry1 |
| 493 |
sta tmp0 |
| 494 |
|
| 495 |
;; Decrement pointers |
| 496 |
lda tmp5 |
| 497 |
sec |
| 498 |
sbc tmp3+1 |
| 499 |
bcs pm2_dec5 |
| 500 |
dec tmp5+1 |
| 501 |
pm2_dec5 |
| 502 |
sta tmp5 |
| 503 |
|
| 504 |
;; Next line |
| 505 |
dec tmp3 |
| 506 |
beq pm2_end |
| 507 |
jmp pm2_loop1 ; End of lines loop |
| 508 |
|
| 509 |
pm2_end |
| 510 |
rts ; We're done! |
| 511 |
|
| 512 |
|
| 513 |
|
| 514 |
|
| 515 |
ats_cur_char .byte $00 |
| 516 |
ats_who_i .byte $00 |
| 517 |
ats_who_j .byte $00 |
| 518 |
ats_who_k .byte $00 |
| 519 |
ats_sizecode .byte $00 |
| 520 |
|
| 521 |
add_this_sprite |
| 522 |
ldx as_num_sp |
| 523 |
dex |
| 524 |
;txa |
| 525 |
lda _chars_in_room,x |
| 526 |
sta ats_cur_char |
| 527 |
|
| 528 |
asl ; Multiply by 4 (sizeof(moving_object_t)) |
| 529 |
asl |
| 530 |
tay |
| 531 |
|
| 532 |
lda _characters,y ; .fine_coord_i |
| 533 |
sta ats_who_i |
| 534 |
iny |
| 535 |
lda _characters,y ; .fine_coord_j |
| 536 |
sta ats_who_j |
| 537 |
iny |
| 538 |
lda _characters,y ; .fine_coord_k |
| 539 |
sta ats_who_k |
| 540 |
iny |
| 541 |
lda _characters,y ; .type |
| 542 |
and #%00111111 |
| 543 |
sta ats_sizecode |
| 544 |
|
| 545 |
; Get inverted flag |
| 546 |
lda _characters,y ; .type |
| 547 |
and #%01000000 |
| 548 |
beq ats_noinvert |
| 549 |
lda #1 |
| 550 |
ats_noinvert |
| 551 |
ldy #6 |
| 552 |
sta (sp),y |
| 553 |
|
| 554 |
lda xo |
| 555 |
pha |
| 556 |
lda yo |
| 557 |
pha |
| 558 |
lda xx |
| 559 |
pha |
| 560 |
lda scry |
| 561 |
pha |
| 562 |
|
| 563 |
|
| 564 |
;; Calculate x,y screen position from fine coordinates i,j,k |
| 565 |
;; Cannot use ij2xy as it is for tile coordinates |
| 566 |
|
| 567 |
lda ats_who_i |
| 568 |
jsr do_div6 |
| 569 |
sta xo |
| 570 |
sta op1 |
| 571 |
|
| 572 |
lda ats_who_j |
| 573 |
jsr do_div6 |
| 574 |
sta yo |
| 575 |
sta op2 |
| 576 |
|
| 577 |
jsr ij2xy |
| 578 |
|
| 579 |
tya |
| 580 |
clc |
| 581 |
adc #12 |
| 582 |
ldy #2 |
| 583 |
sta scry |
| 584 |
|
| 585 |
txa |
| 586 |
ldy #0 |
| 587 |
sta xx |
| 588 |
|
| 589 |
lda xo |
| 590 |
asl |
| 591 |
sta xo |
| 592 |
asl |
| 593 |
clc |
| 594 |
adc xo |
| 595 |
sta xo ; xo=xo*6 |
| 596 |
lda ats_who_i |
| 597 |
clc |
| 598 |
adc #1 |
| 599 |
sec |
| 600 |
sbc xo |
| 601 |
sta tmp ; tmp=who_i-xo*6 |
| 602 |
|
| 603 |
lda yo |
| 604 |
asl |
| 605 |
sta yo |
| 606 |
asl |
| 607 |
clc |
| 608 |
adc yo |
| 609 |
sta yo ; yo=yo*6 |
| 610 |
lda ats_who_j |
| 611 |
clc |
| 612 |
adc #1 |
| 613 |
sec |
| 614 |
sbc yo |
| 615 |
sta yo ; yo=who_j-yo*6 |
| 616 |
|
| 617 |
lda tmp |
| 618 |
sec |
| 619 |
sbc yo |
| 620 |
asl |
| 621 |
sta xo ; xo=(yo-tmp)*2 |
| 622 |
|
| 623 |
lda yo |
| 624 |
clc |
| 625 |
adc tmp |
| 626 |
; Z-pos of sprite |
| 627 |
sec |
| 628 |
sbc ats_who_k |
| 629 |
sta yo ; yo=tmp+yo-zpos |
| 630 |
|
| 631 |
|
| 632 |
;; Now the pointer to graphics... |
| 633 |
lda ats_cur_char |
| 634 |
;; Multiply by 6 (size_of(sprite_t)) |
| 635 |
asl |
| 636 |
asl |
| 637 |
sta tmp |
| 638 |
lda ats_cur_char |
| 639 |
asl |
| 640 |
clc |
| 641 |
adc tmp |
| 642 |
sta tmp |
| 643 |
|
| 644 |
;; Pointer in tmp1 |
| 645 |
lda #LO(_char_pics) |
| 646 |
sta tmp1 |
| 647 |
lda #HI(_char_pics) |
| 648 |
sta tmp1+1 |
| 649 |
|
| 650 |
clc |
| 651 |
lda tmp |
| 652 |
adc tmp1 |
| 653 |
sta tmp1 |
| 654 |
bcc ats_nocarry |
| 655 |
inc tmp1+1 |
| 656 |
ats_nocarry |
| 657 |
|
| 658 |
ldy #4 |
| 659 |
lda tmp1 |
| 660 |
sta (sp),y |
| 661 |
lda tmp1+1 |
| 662 |
iny |
| 663 |
sta (sp),y |
| 664 |
|
| 665 |
|
| 666 |
|
| 667 |
; And the coordinates .... |
| 668 |
lda xx |
| 669 |
clc |
| 670 |
adc xo |
| 671 |
|
| 672 |
; Adjust with the sprite size also... |
| 673 |
clc |
| 674 |
adc #ancho_tile/2 |
| 675 |
;tay |
| 676 |
;ldx ats_sizecode |
| 677 |
;lda _sizes_i,x |
| 678 |
;asl |
| 679 |
;sta tmp |
| 680 |
;tya |
| 681 |
|
| 682 |
tax |
| 683 |
ldy #1 |
| 684 |
lda (tmp1),y ; Get number of scans |
| 685 |
sta tmp |
| 686 |
asl |
| 687 |
clc |
| 688 |
adc tmp ; Multiply by 3 (6 pix per scan /2) |
| 689 |
sta tmp |
| 690 |
txa |
| 691 |
|
| 692 |
sec |
| 693 |
sbc tmp |
| 694 |
|
| 695 |
ldy #0 |
| 696 |
sta (sp),y |
| 697 |
|
| 698 |
ldy #2 |
| 699 |
lda scry |
| 700 |
sec |
| 701 |
sbc #alto_tile |
| 702 |
clc |
| 703 |
adc yo |
| 704 |
|
| 705 |
sta (sp),y |
| 706 |
|
| 707 |
|
| 708 |
jsr put_mask |
| 709 |
|
| 710 |
|
| 711 |
;; Done. Let's restore contents of sp |
| 712 |
pla |
| 713 |
sta scry |
| 714 |
pla |
| 715 |
sta xx |
| 716 |
pla |
| 717 |
sta yo |
| 718 |
pla |
| 719 |
sta xo |
| 720 |
|
| 721 |
|
| 722 |
rts |
| 723 |
|
| 724 |
|
| 725 |
|
| 726 |
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| 727 |
;; put_mask(char x_pos, y_pos, sprite_t * sprite, char invert) |
| 728 |
;; Saves mask of a sprite. Rotates if necessary |
| 729 |
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| 730 |
put_mask |
| 731 |
|
| 732 |
;; Do the minimum necessary to call intersect_rect, |
| 733 |
;; so if painting is not needed we return as fast as possible |
| 734 |
#ifdef TINYNOISE |
| 735 |
jsr fetch_coords |
| 736 |
#else |
| 737 |
;; Fetch x and y coordinates |
| 738 |
ldy #0 |
| 739 |
lda (sp),y |
| 740 |
sta op1 |
| 741 |
ldy #2 |
| 742 |
lda (sp),y |
| 743 |
sta op2 |
| 744 |
|
| 745 |
ldy #4 ; Get sprite pointer |
| 746 |
lda (sp),y |
| 747 |
sta tmp2 |
| 748 |
iny |
| 749 |
lda (sp),y |
| 750 |
sta tmp2+1 |
| 751 |
|
| 752 |
ldy #0 |
| 753 |
lda (tmp2),y ; # of lines |
| 754 |
sta tmp3 |
| 755 |
iny |
| 756 |
lda (tmp2),y |
| 757 |
sta tmp3+1 ; # of scans |
| 758 |
#endif |
| 759 |
clc |
| 760 |
adc #1 |
| 761 |
sta scans_to_draw |
| 762 |
|
| 763 |
jsr intersect_rect |
| 764 |
beq pm_cont1 |
| 765 |
rts |
| 766 |
pm_cont1 |
| 767 |
|
| 768 |
ldy #6 ; Paint inverted |
| 769 |
lda(sp),y |
| 770 |
sta invert4+1 |
| 771 |
|
| 772 |
|
| 773 |
lda #0 |
| 774 |
sta scan_to_start |
| 775 |
|
| 776 |
ldy #4 |
| 777 |
lda (tmp2),y |
| 778 |
sta tmp5 |
| 779 |
iny |
| 780 |
lda (tmp2),y |
| 781 |
sta tmp5+1 ; Pointer to sprite mask |
| 782 |
|
| 783 |
|
| 784 |
lda tmp5 |
| 785 |
sec |
| 786 |
sbc tmp3+1 ; Was tmp... a copy of tmp3+1 (?) |
| 787 |
bcs pm_nocarry3 |
| 788 |
dec tmp5+1 |
| 789 |
pm_nocarry3 |
| 790 |
sta tmp5 |
| 791 |
|
| 792 |
jsr adjust_clip |
| 793 |
jsr pixel_address |
| 794 |
|
| 795 |
; Adjust to buffer_occ |
| 796 |
lda tmp0 |
| 797 |
clc |
| 798 |
adc #LO(buffer_occ-scr_buffer) |
| 799 |
sta tmp0 |
| 800 |
lda tmp0+1 |
| 801 |
adc #HI(buffer_occ-scr_buffer) |
| 802 |
sta tmp0+1 |
| 803 |
|
| 804 |
|
| 805 |
;; We have in tmp1 the code of the pixel in scan |
| 806 |
;; and in tmp0 the destination address |
| 807 |
|
| 808 |
;; Adjust number of rotations per byte |
| 809 |
lda tmp1 |
| 810 |
asl |
| 811 |
asl |
| 812 |
ldx #0 |
| 813 |
pm_preparerot |
| 814 |
asl |
| 815 |
bcs pm_endpreparerot |
| 816 |
inx |
| 817 |
jmp pm_preparerot |
| 818 |
pm_endpreparerot |
| 819 |
stx tmp1 |
| 820 |
|
| 821 |
lda tmp3+1 |
| 822 |
cmp scans_to_draw |
| 823 |
bcc pm_loop1about |
| 824 |
lda scans_to_draw |
| 825 |
pm_loop1about |
| 826 |
sta reg14 |
| 827 |
|
| 828 |
lda scan_to_start |
| 829 |
sta scan2start4+1 |
| 830 |
sta scan2start4b+1 |
| 831 |
|
| 832 |
lda scans_to_draw |
| 833 |
sta scans2draw2+1 |
| 834 |
sta scans2draw2b+1 |
| 835 |
|
| 836 |
|
| 837 |
pm_loop1 |
| 838 |
;; Some initializations... |
| 839 |
ldy #0 |
| 840 |
sty reg15 |
| 841 |
ldy reg14 |
| 842 |
|
| 843 |
pm_loop2 |
| 844 |
lda (tmp0),y ; Take screen contents |
| 845 |
sta tmp |
| 846 |
|
| 847 |
invert4 |
| 848 |
lda #0 |
| 849 |
beq pm_noinvert |
| 850 |
|
| 851 |
sty aux |
| 852 |
lda tmp3+1 |
| 853 |
sec |
| 854 |
sbc aux ; (scans-current_scan) |
| 855 |
tay |
| 856 |
iny |
| 857 |
|
| 858 |
lda (tmp5),y ; Take scan of mask |
| 859 |
tax |
| 860 |
lda tab_inverted_bytes,x |
| 861 |
sta reg13 |
| 862 |
|
| 863 |
ldy aux |
| 864 |
bvc pm_rotate ; Branches allways |
| 865 |
|
| 866 |
pm_noinvert |
| 867 |
lda (tmp5),y ; Take scan of mask |
| 868 |
sta reg13 |
| 869 |
|
| 870 |
pm_rotate |
| 871 |
;; Initializations for rotation loop |
| 872 |
lda #0 |
| 873 |
ldx tmp1 |
| 874 |
beq pm_end_rot |
| 875 |
pm_looprot |
| 876 |
|
| 877 |
clc |
| 878 |
ror reg13 |
| 879 |
ror |
| 880 |
|
| 881 |
dex |
| 882 |
bne pm_looprot |
| 883 |
pm_end_rot |
| 884 |
|
| 885 |
scans2draw2 |
| 886 |
cpy #0 |
| 887 |
bpl pm_nopaint |
| 888 |
|
| 889 |
;; As an scan is composed by the less-significant 6 bits |
| 890 |
;; of the byte we should rotate this twice more... |
| 891 |
|
| 892 |
ror |
| 893 |
ror |
| 894 |
|
| 895 |
|
| 896 |
;; Now we have: |
| 897 |
;; For the mask; |
| 898 |
;; in a the new value for this scan |
| 899 |
;; in reg15 the value calculated previosly for this scan (to be ORed) |
| 900 |
;; in reg13 the value to be ORed to the next scan to be calculated |
| 901 |
|
| 902 |
ora reg15 ; Complete mask for this scan |
| 903 |
ora tmp |
| 904 |
|
| 905 |
|
| 906 |
sta (tmp0),y ; Put everything in screen |
| 907 |
pm_nopaint |
| 908 |
|
| 909 |
ldx reg13 |
| 910 |
stx reg15 ; Ready for next loop |
| 911 |
|
| 912 |
dey |
| 913 |
beq pm_noloop2 |
| 914 |
scan2start4 |
| 915 |
cpy #0 |
| 916 |
bmi pm_nopaint2 |
| 917 |
|
| 918 |
jmp pm_loop2 ; End of scans loop |
| 919 |
pm_noloop2 |
| 920 |
;; THERE IS ONE SCAN LEFT TO GO |
| 921 |
scans2draw2b |
| 922 |
cpy #0 |
| 923 |
bpl pm_nopaint2 |
| 924 |
|
| 925 |
scan2start4b |
| 926 |
cpy #0 |
| 927 |
bmi pm_nopaint2 |
| 928 |
|
| 929 |
|
| 930 |
lda (tmp0),y ; Take screen contents |
| 931 |
sta tmp |
| 932 |
|
| 933 |
lda reg15 ; Get mask for this scan |
| 934 |
ora tmp |
| 935 |
sta (tmp0),y ; Put everything in screen |
| 936 |
pm_nopaint2 |
| 937 |
|
| 938 |
lda tmp0 |
| 939 |
sec |
| 940 |
;sbc #8 ; Point to previous line |
| 941 |
sbc #SCANSINBUFF ; Point to previous line |
| 942 |
bcs pm_no_carry1 |
| 943 |
dec tmp0+1 |
| 944 |
pm_no_carry1 |
| 945 |
sta tmp0 |
| 946 |
|
| 947 |
lda tmp5 |
| 948 |
sec |
| 949 |
sbc tmp3+1 |
| 950 |
bcs pm_dec5 |
| 951 |
dec tmp5+1 |
| 952 |
pm_dec5 |
| 953 |
sta tmp5 |
| 954 |
|
| 955 |
;; Next line |
| 956 |
dec tmp3 |
| 957 |
beq pm_end |
| 958 |
jmp pm_loop1 ; End of lines loop |
| 959 |
|
| 960 |
pm_end |
| 961 |
rts ; We're done! |
| 962 |
|
| 963 |
|
| 964 |
; End of put_mask |
| 965 |
|
| 966 |
|
| 967 |
|
| 968 |
|
| 969 |
|
| 970 |
#ifdef DUMPMASK |
| 971 |
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| 972 |
; void dump_mask() |
| 973 |
; paints the dump mask buffer on screen |
| 974 |
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| 975 |
+dump_mask |
| 976 |
|
| 977 |
lda double_buff |
| 978 |
pha |
| 979 |
lda #0 |
| 980 |
sta double_buff |
| 981 |
|
| 982 |
lda #120 |
| 983 |
sta op1 |
| 984 |
lda #190 |
| 985 |
sta op2 |
| 986 |
jsr pixel_address |
| 987 |
|
| 988 |
|
| 989 |
;; Pointer in tmp1 |
| 990 |
lda #LO(buffer_occ) |
| 991 |
sta tmp1 |
| 992 |
lda #HI(buffer_occ) |
| 993 |
sta tmp1+1 |
| 994 |
|
| 995 |
lda #0 |
| 996 |
sta tmp |
| 997 |
ldx _clip_rgn+3 |
| 998 |
dex |
| 999 |
txa |
| 1000 |
#ifdef EIGTHSCANS |
| 1001 |
asl |
| 1002 |
rol tmp |
| 1003 |
asl |
| 1004 |
rol tmp |
| 1005 |
asl |
| 1006 |
rol tmp |
| 1007 |
|
| 1008 |
adc tmp1 |
| 1009 |
sta tmp1 |
| 1010 |
lda tmp |
| 1011 |
adc tmp1+1 |
| 1012 |
sta tmp1+1 |
| 1013 |
|
| 1014 |
#else |
| 1015 |
asl |
| 1016 |
sta tmp |
| 1017 |
asl |
| 1018 |
clc |
| 1019 |
adc tmp |
| 1020 |
adc tmp1 |
| 1021 |
sta tmp1 |
| 1022 |
bcc nocarryt6 |
| 1023 |
inc tmp1+1 |
| 1024 |
nocarryt6 |
| 1025 |
#endif |
| 1026 |
|
| 1027 |
ldx _clip_rgn+3 ; get lines |
| 1028 |
|
| 1029 |
dm_looplines |
| 1030 |
ldy _clip_rgn+2 ; get scans |
| 1031 |
dey |
| 1032 |
dm_loopscans |
| 1033 |
lda (tmp1),y |
| 1034 |
sta (tmp0),y |
| 1035 |
dey |
| 1036 |
bpl dm_loopscans |
| 1037 |
|
| 1038 |
lda tmp0 |
| 1039 |
sec |
| 1040 |
sbc #40 ; Point to previous line |
| 1041 |
bcs dm_no_carry |
| 1042 |
dec tmp0+1 |
| 1043 |
dm_no_carry |
| 1044 |
sta tmp0 |
| 1045 |
|
| 1046 |
lda tmp1 |
| 1047 |
sec |
| 1048 |
; sbc #8 ; Point to previous line |
| 1049 |
sbc #SCANSINBUFF ; Point to previous line |
| 1050 |
bcs dm_no_carry2 |
| 1051 |
dec tmp1+1 |
| 1052 |
dm_no_carry2 |
| 1053 |
sta tmp1 |
| 1054 |
|
| 1055 |
dex |
| 1056 |
bne dm_looplines |
| 1057 |
|
| 1058 |
pla |
| 1059 |
sta double_buff |
| 1060 |
|
| 1061 |
;rts ; We're done |
| 1062 |
|
| 1063 |
;; End of paint_buff |
| 1064 |
|
| 1065 |
|
| 1066 |
dump_clip |
| 1067 |
lda double_buff |
| 1068 |
pha |
| 1069 |
lda #0 |
| 1070 |
sta double_buff |
| 1071 |
|
| 1072 |
lda #20 |
| 1073 |
sta op1 |
| 1074 |
lda #190 |
| 1075 |
sta op2 |
| 1076 |
jsr pixel_address |
| 1077 |
|
| 1078 |
|
| 1079 |
;; Pointer in tmp1 |
| 1080 |
lda #LO(scr_buffer) |
| 1081 |
sta tmp1 |
| 1082 |
lda #HI(scr_buffer) |
| 1083 |
sta tmp1+1 |
| 1084 |
|
| 1085 |
lda #0 |
| 1086 |
sta tmp |
| 1087 |
ldx _clip_rgn+3 |
| 1088 |
dex |
| 1089 |
txa |
| 1090 |
#ifdef EIGTHSCANS |
| 1091 |
asl |
| 1092 |
rol tmp |
| 1093 |
asl |
| 1094 |
rol tmp |
| 1095 |
asl |
| 1096 |
rol tmp |
| 1097 |
|
| 1098 |
adc tmp1 |
| 1099 |
sta tmp1 |
| 1100 |
lda tmp |
| 1101 |
adc tmp1+1 |
| 1102 |
sta tmp1+1 |
| 1103 |
#else |
| 1104 |
asl |
| 1105 |
sta tmp |
| 1106 |
asl |
| 1107 |
clc |
| 1108 |
adc tmp |
| 1109 |
adc tmp1 |
| 1110 |
sta tmp1 |
| 1111 |
bcc nocarryt5 |
| 1112 |
inc tmp1+1 |
| 1113 |
nocarryt5 |
| 1114 |
#endif |
| 1115 |
|
| 1116 |
|
| 1117 |
|
| 1118 |
ldx _clip_rgn+3 ; get lines |
| 1119 |
|
| 1120 |
dc_looplines |
| 1121 |
ldy _clip_rgn+2 ; get scans |
| 1122 |
dey |
| 1123 |
dc_loopscans |
| 1124 |
lda (tmp1),y |
| 1125 |
sta (tmp0),y |
| 1126 |
dey |
| 1127 |
bpl dc_loopscans |
| 1128 |
|
| 1129 |
lda tmp0 |
| 1130 |
sec |
| 1131 |
sbc #40 ; Point to previous line |
| 1132 |
bcs dc_no_carry |
| 1133 |
dec tmp0+1 |
| 1134 |
dc_no_carry |
| 1135 |
sta tmp0 |
| 1136 |
|
| 1137 |
lda tmp1 |
| 1138 |
sec |
| 1139 |
; sbc #8 ; Point to previous line |
| 1140 |
sbc #SCANSINBUFF ; Point to previous line |
| 1141 |
bcs dc_no_carry2 |
| 1142 |
dec tmp1+1 |
| 1143 |
dc_no_carry2 |
| 1144 |
sta tmp1 |
| 1145 |
|
| 1146 |
dex |
| 1147 |
bne dc_looplines |
| 1148 |
|
| 1149 |
pla |
| 1150 |
sta double_buff |
| 1151 |
|
| 1152 |
rts ; We're done |
| 1153 |
|
| 1154 |
#endif |
| 1155 |
|
| 1156 |
|
| 1157 |
|
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