Rev 6108 | Rev 6126 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
5153 | IgorA | 1 | ; |
2 | ; We draw a triangle with various interpolations |
||
3 | ; |
||
5922 | IgorA | 4 | ; Порядок преобразований цветов вершин: |
5 | ; ZBufferPoint.r -> r1 (+drdl_min or +drdl_max) -> or1 (+drdx) -> [pixel buffer] |
||
6 | ; ZBufferPoint.g -> g1 (+dgdl_min or +dgdl_max) -> og1 (+dgdx) -> [pixel buffer] |
||
7 | ; ZBufferPoint.b -> b1 (+dbdl_min or +dbdl_max) -> ob1 (+dbdx) -> [pixel buffer] |
||
8 | ; |
||
9 | ; В некоторых случаях значения цвета (во 2-м байте переменных: or1,og1,ob1) |
||
10 | ; может становиться < 0 или > 255, тогда появляються пиксели не правильного |
||
11 | ; цвета. Скорее всего это связано с ошибками округления дробных чисел, |
||
12 | ; при вычислении коэфициентов для плавного перехода цвета. |
||
13 | ; |
||
14 | ; Для лечения этой проблемы в версии на C++ специально ограничиваються |
||
15 | ; минимальные и максимальные значения цвета точек (например от 3 до 252). |
||
16 | ; Потому цвета граней могут немного отличаться от указанных в программе. |
||
17 | ; |
||
18 | ; В даной версии алгоритм немного другой. В наиболее вероятных местах появления |
||
19 | ; пикселей не правильного цвета (обычно начало и конец линии) иправляеться |
||
20 | ; цвет испорченных пикселей. Цвет получаеться наиболее близким к указанному |
||
21 | ; пользователем. |
||
22 | |||
5153 | IgorA | 23 | pr1 dd ? ;ZBufferPoint* |
24 | pr2 dd ? ;ZBufferPoint* |
||
25 | l1 dd ? ;ZBufferPoint* |
||
26 | l2 dd ? ;ZBufferPoint* |
||
5175 | IgorA | 27 | fdx1 dd ? ;float |
28 | fdx2 dd ? ;float |
||
29 | fdy1 dd ? ;float |
||
30 | fdy2 dd ? ;float |
||
6113 | IgorA | 31 | fz dd ? ;float - переменная отвечающая за геометрию фигуры |
5175 | IgorA | 32 | d1 dd ? ;float |
33 | d2 dd ? ;float |
||
5153 | IgorA | 34 | pz1 dd ? ;unsigned short* |
35 | pp1 dd ? ;PIXEL* |
||
36 | part dd ? |
||
37 | update_left dd ? |
||
38 | update_right dd ? |
||
39 | |||
5187 | IgorA | 40 | nb_lines dd ? ;число горизонтальных линий в половине треугольника |
5153 | IgorA | 41 | dx1 dd ? |
42 | dy1 dd ? |
||
5187 | IgorA | 43 | ;dx2 dd ? |
5153 | IgorA | 44 | dy2 dd ? |
45 | |||
5187 | IgorA | 46 | error dd ? ;int |
47 | derror dd ? ;int |
||
48 | x1 dd ? ;int |
||
49 | dxdy_min dd ? ;int |
||
50 | dxdy_max dd ? ;int |
||
5153 | IgorA | 51 | ; warning: x2 is multiplied by 2^16 |
5187 | IgorA | 52 | x2 dd ? ;int |
53 | dx2dy2 dd ? ;int |
||
5153 | IgorA | 54 | |
6108 | IgorA | 55 | pz dd ? ;unsigned short * |
56 | z dd ? ;uint |
||
57 | zz dd ? ;uint |
||
58 | |||
6113 | IgorA | 59 | n dd ? ;int - длинна горизонтальной линии в пикселях |
60 | |||
5153 | IgorA | 61 | if INTERP_Z eq 1 |
5187 | IgorA | 62 | z1 dd ? ;int |
63 | dzdx dd ? ;int |
||
64 | dzdy dd ? ;int |
||
65 | dzdl_min dd ? ;int |
||
66 | dzdl_max dd ? ;int |
||
5153 | IgorA | 67 | end if |
68 | if INTERP_RGB eq 1 |
||
69 | r1 dd ? ;int |
||
70 | drdx dd ? |
||
71 | drdy dd ? |
||
72 | drdl_min dd ? |
||
73 | drdl_max dd ? |
||
74 | g1 dd ? |
||
75 | dgdx dd ? |
||
76 | dgdy dd ? |
||
77 | dgdl_min dd ? |
||
78 | dgdl_max dd ? |
||
79 | b1 dd ? |
||
80 | dbdx dd ? |
||
81 | dbdy dd ? |
||
82 | dbdl_min dd ? |
||
83 | dbdl_max dd ? |
||
6113 | IgorA | 84 | or1 dd ? ;uint |
85 | og1 dd ? ;uint |
||
86 | ob1 dd ? ;uint |
||
5153 | IgorA | 87 | end if |
88 | if INTERP_ST eq 1 |
||
5187 | IgorA | 89 | s1 dd ? ;int |
90 | dsdy dd ? ;int |
||
91 | dsdl_min dd ? ;int |
||
92 | dsdl_max dd ? ;int |
||
93 | t1 dd ? ;int |
||
94 | dtdy dd ? ;int |
||
95 | dtdl_min dd ? ;int |
||
96 | dtdl_max dd ? ;int |
||
5153 | IgorA | 97 | end if |
98 | if INTERP_STZ eq 1 |
||
5175 | IgorA | 99 | sz1 dd ? ;float |
100 | dszdx dd ? ;float |
||
101 | dszdy dd ? ;float |
||
102 | dszdl_min dd ? ;float |
||
103 | dszdl_max dd ? ;float |
||
104 | tz1 dd ? ;float |
||
105 | dtzdx dd ? ;float |
||
106 | dtzdy dd ? ;float |
||
107 | dtzdl_min dd ? ;float |
||
108 | dtzdl_max dd ? ;float |
||
6108 | IgorA | 109 | s_z dd ? ;float |
110 | t_z dd ? ;float |
||
5153 | IgorA | 111 | end if |
6113 | IgorA | 112 | if (INTERP_ST eq 1) | (DRAW_LINE_M eq 1) |
5175 | IgorA | 113 | s dd ? ;uint |
114 | t dd ? ;uint |
||
6113 | IgorA | 115 | dsdx dd ? ;int |
116 | dtdx dd ? ;int |
||
5175 | IgorA | 117 | end if |
5153 | IgorA | 118 | endl |
5187 | IgorA | 119 | pushad |
5153 | IgorA | 120 | |
5175 | IgorA | 121 | ; we sort the vertex with increasing y |
122 | mov ebx,[p0] |
||
123 | mov ecx,[p1] |
||
124 | mov edx,[p2] |
||
5187 | IgorA | 125 | mov eax,[edx+offs_zbup_y] |
126 | cmp [ecx+offs_zbup_y],eax ;(2-1) |
||
127 | jle @f |
||
128 | xchg edx,ecx |
||
5175 | IgorA | 129 | @@: |
130 | mov eax,[ecx+offs_zbup_y] |
||
5187 | IgorA | 131 | cmp [ebx+offs_zbup_y],eax ;(1-0) |
132 | jle @f |
||
133 | xchg ecx,ebx |
||
134 | @@: |
||
135 | mov eax,[edx+offs_zbup_y] |
||
136 | cmp [ecx+offs_zbup_y],eax ;(2-1) |
||
137 | jle @f |
||
138 | xchg edx,ecx |
||
139 | @@: |
||
140 | mov [p0],ebx |
||
141 | mov [p1],ecx |
||
142 | mov [p2],edx |
||
5153 | IgorA | 143 | |
144 | ; we compute dXdx and dXdy for all interpolated values |
||
5175 | IgorA | 145 | mov eax,[ecx+offs_zbup_x] |
146 | sub eax,[ebx+offs_zbup_x] |
||
147 | mov [fdx1],eax ;p1.x - p0.x |
||
148 | mov eax,[ecx+offs_zbup_y] |
||
149 | sub eax,[ebx+offs_zbup_y] |
||
150 | mov [fdy1],eax ;p1.y - p0.y |
||
5153 | IgorA | 151 | |
5175 | IgorA | 152 | mov eax,[edx+offs_zbup_x] |
153 | sub eax,[ebx+offs_zbup_x] |
||
154 | mov [fdx2],eax ;p2.x - p0.x |
||
155 | mov eax,[edx+offs_zbup_y] |
||
156 | sub eax,[ebx+offs_zbup_y] |
||
157 | mov [fdy2],eax ;p2.y - p0.y |
||
5153 | IgorA | 158 | |
5187 | IgorA | 159 | fild dword[fdx1] |
160 | fst dword[fdx1] |
||
161 | fild dword[fdy2] |
||
162 | fst dword[fdy2] |
||
163 | fmulp |
||
5175 | IgorA | 164 | fild dword[fdx2] |
165 | fst dword[fdx2] |
||
166 | fild dword[fdy1] |
||
167 | fst dword[fdy1] |
||
168 | fmulp |
||
5187 | IgorA | 169 | fsubp ;st0 = st1-st0 |
5175 | IgorA | 170 | fst dword[fz] ;fz = fdx1 * fdy2 - fdx2 * fdy1 |
171 | fldz |
||
5187 | IgorA | 172 | fcompp ;if (fz == 0) return |
5175 | IgorA | 173 | fstsw ax |
174 | sahf |
||
175 | je .end_f |
||
5189 | IgorA | 176 | |
5175 | IgorA | 177 | fld1 |
178 | fdiv dword[fz] ;fz = 1.0 / fz |
||
179 | fst dword[fz] ;st0 = fz |
||
5153 | IgorA | 180 | |
5175 | IgorA | 181 | fld dword[fdx1] |
182 | fmul st0,st1 |
||
183 | fstp dword[fdx1] ;fdx1 *= fz |
||
184 | fld dword[fdy1] |
||
185 | fmul st0,st1 |
||
186 | fstp dword[fdy1] ;fdy1 *= fz |
||
187 | fld dword[fdx2] |
||
188 | fmul st0,st1 |
||
189 | fstp dword[fdx2] ;fdx2 *= fz |
||
190 | fld dword[fdy2] |
||
191 | fmul st0,st1 |
||
192 | fstp dword[fdy2] ;fdy2 *= fz |
||
193 | ffree st0 |
||
194 | fincstp |
||
5153 | IgorA | 195 | |
196 | if INTERP_Z eq 1 |
||
5175 | IgorA | 197 | mov eax,[ecx+offs_zbup_z] |
198 | sub eax,[ebx+offs_zbup_z] |
||
199 | mov [d1],eax |
||
200 | mov eax,[edx+offs_zbup_z] |
||
201 | sub eax,[ebx+offs_zbup_z] |
||
202 | mov [d2],eax |
||
5187 | IgorA | 203 | fild dword[d1] ;d1 = p1.z - p0.z |
204 | fild dword[d2] ;d2 = p2.z - p0.z |
||
5175 | IgorA | 205 | |
5187 | IgorA | 206 | fld dword[fdy2] |
207 | fmul st0,st2 |
||
5175 | IgorA | 208 | fld dword[fdy1] |
5187 | IgorA | 209 | fmul st0,st2 |
210 | fsubp |
||
211 | fistp dword[dzdx] ;dzdx = (int) (fdy2*d1 - fdy1*d2) |
||
212 | fld dword[fdx1] |
||
5175 | IgorA | 213 | fmul st0,st1 |
5187 | IgorA | 214 | fld dword[fdx2] |
5175 | IgorA | 215 | fmul st0,st3 |
5187 | IgorA | 216 | fsubp |
5175 | IgorA | 217 | fistp dword[dzdy] ;dzdy = (int) (fdx1*d2 - fdx2*d1) |
5187 | IgorA | 218 | ffree st0 ;free d2 |
5175 | IgorA | 219 | fincstp |
5187 | IgorA | 220 | ffree st0 ;free d1 |
221 | fincstp |
||
5153 | IgorA | 222 | end if |
223 | |||
224 | if INTERP_RGB eq 1 |
||
5175 | IgorA | 225 | mov eax,[ecx+offs_zbup_r] |
226 | sub eax,[ebx+offs_zbup_r] |
||
227 | mov [d1],eax |
||
228 | mov eax,[edx+offs_zbup_r] |
||
229 | sub eax,[ebx+offs_zbup_r] |
||
230 | mov [d2],eax |
||
5187 | IgorA | 231 | fild dword[d1] ;d1 = p1.r - p0.r |
232 | fild dword[d2] ;d2 = p2.r - p0.r |
||
5153 | IgorA | 233 | |
5187 | IgorA | 234 | fld dword[fdy2] |
235 | fmul st0,st2 |
||
5175 | IgorA | 236 | fld dword[fdy1] |
5187 | IgorA | 237 | fmul st0,st2 |
238 | fsubp |
||
239 | fistp dword[drdx] ;drdx = (int) (fdy2*d1 - fdy1*d2) |
||
240 | fld dword[fdx1] |
||
5175 | IgorA | 241 | fmul st0,st1 |
5187 | IgorA | 242 | fld dword[fdx2] |
5175 | IgorA | 243 | fmul st0,st3 |
5187 | IgorA | 244 | fsubp |
5175 | IgorA | 245 | fistp dword[drdy] ;drdy = (int) (fdx1*d2 - fdx2*d1) |
5187 | IgorA | 246 | ffree st0 ;free d2 |
5175 | IgorA | 247 | fincstp |
5187 | IgorA | 248 | ffree st0 ;free d1 |
249 | fincstp |
||
5153 | IgorA | 250 | |
5175 | IgorA | 251 | mov eax,[ecx+offs_zbup_g] |
252 | sub eax,[ebx+offs_zbup_g] |
||
253 | mov [d1],eax |
||
254 | mov eax,[edx+offs_zbup_g] |
||
255 | sub eax,[ebx+offs_zbup_g] |
||
256 | mov [d2],eax |
||
5187 | IgorA | 257 | fild dword[d1] ;d1 = p1.g - p0.g |
258 | fild dword[d2] ;d2 = p2.g - p0.g |
||
5153 | IgorA | 259 | |
5187 | IgorA | 260 | fld dword[fdy2] |
261 | fmul st0,st2 |
||
5175 | IgorA | 262 | fld dword[fdy1] |
5187 | IgorA | 263 | fmul st0,st2 |
264 | fsubp |
||
265 | fistp dword[dgdx] ;dgdx = (int) (fdy2*d1 - fdy1*d2) |
||
266 | fld dword[fdx1] |
||
5175 | IgorA | 267 | fmul st0,st1 |
5187 | IgorA | 268 | fld dword[fdx2] |
5175 | IgorA | 269 | fmul st0,st3 |
5187 | IgorA | 270 | fsubp |
5175 | IgorA | 271 | fistp dword[dgdy] ;dgdy = (int) (fdx1*d2 - fdx2*d1) |
5187 | IgorA | 272 | ffree st0 ;free d2 |
5175 | IgorA | 273 | fincstp |
5187 | IgorA | 274 | ffree st0 ;free d1 |
275 | fincstp |
||
5175 | IgorA | 276 | |
277 | mov eax,[ecx+offs_zbup_b] |
||
278 | sub eax,[ebx+offs_zbup_b] |
||
279 | mov [d1],eax |
||
280 | mov eax,[edx+offs_zbup_b] |
||
281 | sub eax,[ebx+offs_zbup_b] |
||
282 | mov [d2],eax |
||
5187 | IgorA | 283 | fild dword[d1] ;d1 = p1.b - p0.b |
284 | fild dword[d2] ;d2 = p2.b - p0.b |
||
5175 | IgorA | 285 | |
5187 | IgorA | 286 | fld dword[fdy2] |
287 | fmul st0,st2 |
||
5175 | IgorA | 288 | fld dword[fdy1] |
5187 | IgorA | 289 | fmul st0,st2 |
290 | fsubp |
||
291 | fistp dword[dbdx] ;dbdx = (int) (fdy2*d1 - fdy1*d2) |
||
292 | fld dword[fdx1] |
||
5175 | IgorA | 293 | fmul st0,st1 |
5187 | IgorA | 294 | fld dword[fdx2] |
5175 | IgorA | 295 | fmul st0,st3 |
5187 | IgorA | 296 | fsubp |
5175 | IgorA | 297 | fistp dword[dbdy] ;dbdy = (int) (fdx1*d2 - fdx2*d1) |
5187 | IgorA | 298 | ffree st0 ;free d2 |
5175 | IgorA | 299 | fincstp |
5187 | IgorA | 300 | ffree st0 ;free d1 |
301 | fincstp |
||
5153 | IgorA | 302 | end if |
303 | |||
304 | if INTERP_ST eq 1 |
||
5175 | IgorA | 305 | mov eax,[ecx+offs_zbup_s] |
306 | sub eax,[ebx+offs_zbup_s] |
||
307 | mov [d1],eax |
||
308 | mov eax,[edx+offs_zbup_s] |
||
309 | sub eax,[ebx+offs_zbup_s] |
||
310 | mov [d2],eax |
||
5187 | IgorA | 311 | fild dword[d1] ;d1 = p1.s - p0.s |
312 | fild dword[d2] ;d2 = p2.s - p0.s |
||
5153 | IgorA | 313 | |
5187 | IgorA | 314 | fld dword[fdy2] |
315 | fmul st0,st2 |
||
5175 | IgorA | 316 | fld dword[fdy1] |
5187 | IgorA | 317 | fmul st0,st2 |
318 | fsubp |
||
5175 | IgorA | 319 | fistp dword[dsdx] ;dsdx = (int) (fdy2*d1 - fdy1*d2) |
320 | fld dword[fdx2] |
||
321 | fmul st0,st2 |
||
322 | fld dword[fdx1] |
||
323 | fmul st0,st2 |
||
324 | fsub st0,st1 |
||
325 | fistp dword[dsdy] ;dsdy = (int) (fdx1*d2 - fdx2*d1) |
||
326 | ffree st0 |
||
327 | fincstp |
||
5187 | IgorA | 328 | ffree st0 ;free d2 |
329 | fincstp |
||
330 | ffree st0 ;free d1 |
||
331 | fincstp |
||
5175 | IgorA | 332 | |
333 | mov eax,[ecx+offs_zbup_t] |
||
334 | sub eax,[ebx+offs_zbup_t] |
||
335 | mov [d1],eax |
||
336 | mov eax,[edx+offs_zbup_t] |
||
337 | sub eax,[ebx+offs_zbup_t] |
||
338 | mov [d2],eax |
||
5187 | IgorA | 339 | fild dword[d1] ;d1 = p1.t - p0.t |
340 | fild dword[d2] ;d2 = p2.t - p0.t |
||
5175 | IgorA | 341 | |
342 | fld dword[fdy1] |
||
343 | fmul st0,st1 |
||
344 | fld dword[fdy2] |
||
345 | fmul st0,st3 |
||
346 | fsub st0,st1 |
||
347 | fistp dword[dtdx] ;dtdx = (int) (fdy2*d1 - fdy1*d2) |
||
348 | ffree st0 |
||
349 | fincstp |
||
350 | fld dword[fdx2] |
||
351 | fmul st0,st2 |
||
352 | fld dword[fdx1] |
||
353 | fmul st0,st2 |
||
354 | fsub st0,st1 |
||
355 | fistp dword[dtdy] ;dtdy = (int) (fdx1*d2 - fdx2*d1) |
||
356 | ffree st0 |
||
357 | fincstp |
||
5187 | IgorA | 358 | ffree st0 ;free d2 |
359 | fincstp |
||
360 | ffree st0 ;free d1 |
||
361 | fincstp |
||
5153 | IgorA | 362 | end if |
363 | |||
364 | if INTERP_STZ eq 1 |
||
5175 | IgorA | 365 | fild dword[ebx+offs_zbup_z] |
366 | fild dword[ebx+offs_zbup_s] |
||
367 | fmul st0,st1 |
||
368 | fstp dword[ebx+offs_zbup_sz] ;p0.sz = (float) p0.s * p0.z |
||
369 | fild dword[ebx+offs_zbup_t] |
||
5187 | IgorA | 370 | fmulp |
5175 | IgorA | 371 | fstp dword[ebx+offs_zbup_tz] ;p0.tz = (float) p0.t * p0.z |
5153 | IgorA | 372 | |
5175 | IgorA | 373 | fild dword[ecx+offs_zbup_z] |
374 | fild dword[ecx+offs_zbup_s] |
||
375 | fmul st0,st1 |
||
376 | fstp dword[ecx+offs_zbup_sz] ;p1.sz = (float) p1.s * p1.z |
||
377 | fild dword[ecx+offs_zbup_t] |
||
5187 | IgorA | 378 | fmulp |
5175 | IgorA | 379 | fstp dword[ecx+offs_zbup_tz] ;p1.tz = (float) p1.t * p1.z |
5153 | IgorA | 380 | |
5175 | IgorA | 381 | fild dword[edx+offs_zbup_z] |
382 | fild dword[edx+offs_zbup_s] |
||
383 | fmul st0,st1 |
||
384 | fstp dword[edx+offs_zbup_sz] ;p2.sz = (float) p2.s * p2.z |
||
385 | fild dword[edx+offs_zbup_t] |
||
5187 | IgorA | 386 | fmulp |
5175 | IgorA | 387 | fstp dword[edx+offs_zbup_tz] ;p2.tz = (float) p2.t * p2.z |
388 | |||
389 | fld dword[ecx+offs_zbup_sz] |
||
5187 | IgorA | 390 | fsub dword[ebx+offs_zbup_sz] ;d1 = p1.sz - p0.sz |
5175 | IgorA | 391 | fld dword[edx+offs_zbup_sz] |
5187 | IgorA | 392 | fsub dword[ebx+offs_zbup_sz] ;d2 = p2.sz - p0.sz |
5175 | IgorA | 393 | |
5187 | IgorA | 394 | fld dword[fdy2] |
395 | fmul st0,st2 |
||
5175 | IgorA | 396 | fld dword[fdy1] |
5187 | IgorA | 397 | fmul st0,st2 |
398 | fsubp |
||
399 | fstp dword[dszdx] ;dszdx = (fdy2*d1 - fdy1*d2) |
||
5175 | IgorA | 400 | fld dword[fdx2] |
401 | fmul st0,st2 |
||
402 | fld dword[fdx1] |
||
403 | fmul st0,st2 |
||
404 | fsub st0,st1 |
||
5187 | IgorA | 405 | fstp dword[dszdy] ;dszdy = (fdx1*d2 - fdx2*d1) |
5175 | IgorA | 406 | ffree st0 |
407 | fincstp |
||
5187 | IgorA | 408 | ffree st0 ;free d2 |
409 | fincstp |
||
410 | ffree st0 ;free d1 |
||
411 | fincstp |
||
5175 | IgorA | 412 | |
413 | fld dword[ecx+offs_zbup_tz] |
||
5187 | IgorA | 414 | fsub dword[ebx+offs_zbup_tz] ;d1 = p1.tz - p0.tz |
5175 | IgorA | 415 | fld dword[edx+offs_zbup_tz] |
5187 | IgorA | 416 | fsub dword[ebx+offs_zbup_tz] ;d2 = p2.tz - p0.tz |
5175 | IgorA | 417 | |
418 | fld dword[fdy1] |
||
419 | fmul st0,st1 |
||
420 | fld dword[fdy2] |
||
421 | fmul st0,st3 |
||
422 | fsub st0,st1 |
||
5187 | IgorA | 423 | fstp dword[dtzdx] ;dtzdx = (fdy2*d1 - fdy1*d2) |
5175 | IgorA | 424 | ffree st0 |
425 | fincstp |
||
426 | fld dword[fdx2] |
||
427 | fmul st0,st2 |
||
428 | fld dword[fdx1] |
||
429 | fmul st0,st2 |
||
430 | fsub st0,st1 |
||
5187 | IgorA | 431 | fstp dword[dtzdy] ;dtzdy = (fdx1*d2 - fdx2*d1) |
5175 | IgorA | 432 | ffree st0 |
433 | fincstp |
||
5187 | IgorA | 434 | ffree st0 ;free d2 |
435 | fincstp |
||
436 | ffree st0 ;free d1 |
||
437 | fincstp |
||
5153 | IgorA | 438 | end if |
439 | |||
440 | ; screen coordinates |
||
5175 | IgorA | 441 | mov eax,[zb] |
442 | mov edx,[eax+offs_zbuf_linesize] |
||
443 | imul edx,[ebx+offs_zbup_y] |
||
444 | add edx,[eax+offs_zbuf_pbuf] |
||
445 | mov [pp1],edx ;pp1 = zb.pbuf + zb.linesize * p0.y |
||
446 | mov edx,[eax+offs_zbuf_xsize] |
||
447 | imul edx,[ebx+offs_zbup_y] |
||
448 | shl edx,1 |
||
449 | add edx,[eax+offs_zbuf_zbuf] |
||
450 | mov [pz1],edx ;pz1 = zb.zbuf + zb.xsize * p0.y |
||
5153 | IgorA | 451 | |
452 | DRAW_INIT |
||
453 | |||
5175 | IgorA | 454 | mov dword[part],0 |
455 | .cycle_0: |
||
456 | mov ebx,[p0] |
||
457 | mov ecx,[p1] |
||
458 | mov edx,[p2] |
||
5187 | IgorA | 459 | cmp dword[part],0 ;if (part == 0) |
5175 | IgorA | 460 | jne .els_0 |
461 | mov dword[update_left],1 |
||
462 | mov dword[update_right],1 |
||
463 | mov [l1],ebx |
||
464 | mov [pr1],ebx |
||
465 | fldz |
||
466 | fld dword[fz] |
||
467 | fcompp ;if (fz > 0) |
||
468 | fstsw ax |
||
469 | sahf |
||
470 | jbe .els_1 |
||
471 | mov [l2],edx |
||
472 | mov [pr2],ecx |
||
473 | jmp .end_1 |
||
474 | .els_1: |
||
475 | mov [l2],ecx |
||
476 | mov [pr2],edx |
||
477 | .end_1: |
||
478 | mov eax,[ecx+offs_zbup_y] |
||
479 | sub eax,[ebx+offs_zbup_y] |
||
480 | mov [nb_lines],eax ;nb_lines = p1.y - p0.y |
||
481 | jmp .end_0 |
||
482 | .els_0: |
||
483 | ; second part |
||
484 | fldz |
||
485 | fld dword[fz] |
||
486 | fcompp ;if (fz > 0) |
||
487 | fstsw ax |
||
488 | sahf |
||
489 | jbe .els_2 |
||
5187 | IgorA | 490 | mov dword[update_left],0 |
491 | mov dword[update_right],1 |
||
5175 | IgorA | 492 | mov [pr1],ecx |
493 | mov [pr2],edx |
||
494 | jmp .end_2 |
||
495 | .els_2: |
||
5187 | IgorA | 496 | mov dword[update_left],1 |
497 | mov dword[update_right],0 |
||
5175 | IgorA | 498 | mov [l1],ecx |
499 | mov [l2],edx |
||
500 | .end_2: |
||
501 | mov eax,[edx+offs_zbup_y] |
||
502 | sub eax,[ecx+offs_zbup_y] |
||
503 | inc eax |
||
504 | mov [nb_lines],eax ;nb_lines = p2.y - p1.y + 1 |
||
505 | .end_0: |
||
5153 | IgorA | 506 | |
507 | ; compute the values for the left edge |
||
5175 | IgorA | 508 | cmp dword[update_left],0 ;if (update_left) |
509 | je .end_upd_l |
||
510 | mov ebx,[l1] |
||
511 | mov ecx,[l2] |
||
5187 | IgorA | 512 | mov edx,[ecx+offs_zbup_y] |
513 | sub edx,[ebx+offs_zbup_y] |
||
514 | mov [dy1],edx ;dy1 = l2.y - l1.y |
||
5175 | IgorA | 515 | mov eax,[ecx+offs_zbup_x] |
516 | sub eax,[ebx+offs_zbup_x] |
||
517 | mov [dx1],eax ;dx1 = l2.x - l1.x |
||
5187 | IgorA | 518 | cmp edx,0 ;if (dy1 > 0) |
5175 | IgorA | 519 | jle .els_3 |
5187 | IgorA | 520 | xor edx,edx |
521 | cmp eax,0 |
||
522 | jl .otr_dx1 |
||
5175 | IgorA | 523 | shl eax,16 |
524 | div dword[dy1] ;eax = (dx1 << 16) / dy1 |
||
525 | jmp .end_3 |
||
5187 | IgorA | 526 | .otr_dx1: |
527 | neg eax |
||
528 | inc eax |
||
529 | shl eax,16 |
||
530 | div dword[dy1] ;eax = (-dx1 << 16) / dy1 |
||
531 | neg eax |
||
532 | inc eax |
||
533 | jmp .end_3 |
||
5175 | IgorA | 534 | .els_3: |
535 | xor eax,eax |
||
536 | .end_3: |
||
537 | mov edx,[ebx+offs_zbup_x] |
||
5187 | IgorA | 538 | mov [x1],edx ;x1 = l1.x |
539 | mov dword[error],0 ;error = 0 |
||
5175 | IgorA | 540 | mov dword[derror],eax |
5187 | IgorA | 541 | and dword[derror],0xffff ;derror = eax & 0x0000ffff |
5208 | IgorA | 542 | sar eax,16 |
5187 | IgorA | 543 | mov [dxdy_min],eax ;dxdy_min = eax >> 16 |
5175 | IgorA | 544 | inc eax |
545 | mov [dxdy_max],eax |
||
5153 | IgorA | 546 | |
547 | if INTERP_Z eq 1 |
||
5175 | IgorA | 548 | mov eax,[l1] |
549 | mov eax,[eax+offs_zbup_z] |
||
550 | mov [z1],eax ;z1 = l1.z |
||
551 | mov eax,[dzdx] |
||
552 | imul eax,[dxdy_min] |
||
553 | add eax,[dzdy] |
||
554 | mov [dzdl_min],eax ;dzdl_min = (dzdy +dzdx*dxdy_min) |
||
555 | add eax,[dzdx] |
||
556 | mov [dzdl_max],eax ;dzdl_max = dzdl_min +dzdx |
||
5153 | IgorA | 557 | end if |
558 | if INTERP_RGB eq 1 |
||
5175 | IgorA | 559 | mov ebx,[l1] |
560 | mov eax,[ebx+offs_zbup_r] |
||
561 | mov [r1],eax ;r1 = l1.r |
||
562 | mov eax,[drdx] |
||
563 | imul eax,[dxdy_min] |
||
564 | add eax,[drdy] |
||
565 | mov [drdl_min],eax ;drdl_min = (drdy +drdx*dxdy_min) |
||
566 | add eax,[drdx] |
||
567 | mov [drdl_max],eax ;drdl_max = drdl_min +drdx |
||
5153 | IgorA | 568 | |
5175 | IgorA | 569 | mov eax,[ebx+offs_zbup_g] |
570 | mov [g1],eax ;g1 = l1.g |
||
571 | mov eax,[dgdx] |
||
572 | imul eax,[dxdy_min] |
||
573 | add eax,[dgdy] |
||
574 | mov [dgdl_min],eax ;dgdl_min = (dgdy +dgdx*dxdy_min) |
||
575 | add eax,[dgdx] |
||
576 | mov [dgdl_max],eax ;dgdl_max = dgdl_min +dgdx |
||
5153 | IgorA | 577 | |
5175 | IgorA | 578 | mov eax,[ebx+offs_zbup_b] |
579 | mov [b1],eax ;b1 = l1.b |
||
580 | mov eax,[dbdx] |
||
581 | imul eax,[dxdy_min] |
||
582 | add eax,[dbdy] |
||
583 | mov [dbdl_min],eax ;dbdl_min = (dbdy +dbdx*dxdy_min) |
||
584 | add eax,[dbdx] |
||
585 | mov [dbdl_max],eax ;dbdl_max = dbdl_min +dbdx |
||
5153 | IgorA | 586 | end if |
587 | if INTERP_ST eq 1 |
||
5175 | IgorA | 588 | mov ebx,[l1] |
589 | mov eax,[ebx+offs_zbup_s] |
||
590 | mov [s1],eax ;s1 = l1.s |
||
591 | mov eax,[dsdx] |
||
592 | imul eax,[dxdy_min] |
||
593 | add eax,[dsdy] |
||
594 | mov [dsdl_min],eax ;dsdl_min = (dsdy +dsdx*dxdy_min) |
||
595 | add eax,[dsdx] |
||
596 | mov [dsdl_max],eax ;dsdl_max = dsdl_min +dsdx |
||
5153 | IgorA | 597 | |
5175 | IgorA | 598 | mov eax,[ebx+offs_zbup_t] |
599 | mov [t1],eax ;t1 = l1.t |
||
600 | mov eax,[dtdx] |
||
601 | imul eax,[dxdy_min] |
||
602 | add eax,[dtdy] |
||
603 | mov [dtdl_min],eax ;dtdl_min = (dtdy +dtdx*dxdy_min) |
||
604 | add eax,[dtdx] |
||
605 | mov [dtdl_max],eax ;dtdl_max = dtdl_min +dtdx |
||
5153 | IgorA | 606 | end if |
607 | if INTERP_STZ eq 1 |
||
5175 | IgorA | 608 | mov ebx,[l1] |
609 | mov eax,[ebx+offs_zbup_sz] |
||
610 | mov [sz1],eax ;sz1 = l1.sz - преобразований нет, потому без сопроцессора |
||
611 | fild dword[dxdy_min] |
||
612 | fmul dword[dszdx] |
||
613 | fadd dword[dszdy] |
||
614 | fst dword[dszdl_min] ;dszdl_min = (dszdy +dszdx*dxdy_min) |
||
615 | fadd dword[dszdx] |
||
616 | fstp dword[dszdl_max] ;dszdl_max = dszdl_min +dszdx |
||
5153 | IgorA | 617 | |
5175 | IgorA | 618 | mov eax,[ebx+offs_zbup_tz] |
619 | mov [tz1],eax ;tz1 = l1.tz - преобразований нет, потому без сопроцессора |
||
620 | fild dword[dxdy_min] |
||
621 | fmul dword[dtzdx] |
||
622 | fadd dword[dtzdy] |
||
623 | fst dword[dtzdl_min] ;dtzdl_min = (dtzdy +dtzdx*dxdy_min) |
||
624 | fadd dword[dtzdx] |
||
625 | fstp dword[dtzdl_max] ;dtzdl_max = dtzdl_min +dtzdx |
||
5153 | IgorA | 626 | end if |
5175 | IgorA | 627 | .end_upd_l: |
5153 | IgorA | 628 | |
5175 | IgorA | 629 | ; compute values for the right edge |
5153 | IgorA | 630 | |
5175 | IgorA | 631 | cmp dword[update_right],0 ;if(update_right) |
632 | je .end_upd_r |
||
633 | mov ebx,[pr1] |
||
634 | mov ecx,[pr2] |
||
5187 | IgorA | 635 | mov edx,[ebx+offs_zbup_x] |
5175 | IgorA | 636 | mov eax,[ecx+offs_zbup_x] |
5187 | IgorA | 637 | sub eax,edx |
638 | ;mov [dx2],eax ;dx2 = pr2.x - pr1.x |
||
639 | shl edx,16 |
||
640 | mov [x2],edx ; x2 = pr1.x << 16 |
||
641 | mov edx,[ecx+offs_zbup_y] |
||
642 | sub edx,[ebx+offs_zbup_y] |
||
643 | mov [dy2],edx ;dy2 = pr2.y - pr1.y |
||
644 | cmp edx,0 ;if (dy2 > 0) |
||
5175 | IgorA | 645 | jle .els_4 |
5187 | IgorA | 646 | xor edx,edx |
647 | cmp eax,0 |
||
648 | jl .otr_dx2 |
||
5175 | IgorA | 649 | shl eax,16 |
650 | div dword[dy2] ;eax = (dx2 << 16) / dy2 |
||
651 | jmp .end_4 |
||
5187 | IgorA | 652 | .otr_dx2: |
653 | neg eax |
||
654 | inc eax ;dx2 *= -1 |
||
655 | shl eax,16 |
||
656 | div dword[dy2] ;eax = (-dx2 << 16) / dy2 |
||
657 | neg eax |
||
658 | inc eax |
||
659 | jmp .end_4 |
||
5175 | IgorA | 660 | .els_4: |
661 | xor eax,eax |
||
662 | .end_4: |
||
663 | mov [dx2dy2],eax |
||
664 | .end_upd_r: |
||
5153 | IgorA | 665 | |
5175 | IgorA | 666 | ; we draw all the scan line of the part |
5187 | IgorA | 667 | if DEBUG ;[nb_lines] |
668 | push ecx edi |
||
669 | mov eax,[nb_lines] |
||
670 | mov ecx,80 |
||
671 | lea edi,[buf_param] |
||
672 | stdcall convert_int_to_str,ecx |
||
5153 | IgorA | 673 | |
5187 | IgorA | 674 | stdcall str_n_cat,edi,txt_nl,2 |
675 | stdcall dbg_print,f_fill_tr_nl,buf_param |
||
676 | pop edi ecx |
||
677 | end if |
||
678 | |||
5175 | IgorA | 679 | .beg_w_lin: |
680 | cmp dword[nb_lines],0 ;while (nb_lines>0) |
||
681 | jle .end_w_lin |
||
682 | dec dword[nb_lines] |
||
683 | if DRAW_LINE_M eq 1 |
||
6113 | IgorA | 684 | DRAW_LINE |
5175 | IgorA | 685 | else |
686 | ; generic draw line |
||
687 | mov eax,[x2] |
||
5208 | IgorA | 688 | sar eax,16 |
5175 | IgorA | 689 | mov edi,[x1] |
690 | sub eax,edi |
||
691 | mov [n],eax ;n = (x2 >> 16) - x1 |
||
692 | imul edi,PSZB |
||
693 | add edi,[pp1] ;pp = pp1 + x1 * PSZB |
||
5187 | IgorA | 694 | |
5153 | IgorA | 695 | if INTERP_Z eq 1 |
5175 | IgorA | 696 | mov eax,[x1] |
697 | shl eax,1 |
||
698 | add eax,[pz1] |
||
699 | mov [pz],eax |
||
700 | mov eax,[z1] |
||
701 | mov [z],eax |
||
5153 | IgorA | 702 | end if |
703 | if INTERP_RGB eq 1 |
||
5175 | IgorA | 704 | mov eax,[r1] |
5922 | IgorA | 705 | bt eax,31 ; коректирование испорченных пикселей (в начале линии) |
706 | jnc @f |
||
707 | xor eax,eax |
||
708 | @@: |
||
709 | bt eax,16 |
||
710 | jnc @f |
||
711 | mov eax,0xff00 |
||
712 | @@: |
||
5175 | IgorA | 713 | mov [or1],eax |
714 | mov eax,[g1] |
||
5922 | IgorA | 715 | bt eax,31 |
716 | jnc @f |
||
717 | xor eax,eax |
||
718 | @@: |
||
719 | bt eax,16 |
||
720 | jnc @f |
||
721 | mov eax,0xff00 |
||
722 | @@: |
||
5175 | IgorA | 723 | mov [og1],eax |
724 | mov eax,[b1] |
||
5922 | IgorA | 725 | bt eax,31 |
726 | jnc @f |
||
727 | xor eax,eax |
||
728 | @@: |
||
729 | bt eax,16 |
||
730 | jnc @f |
||
731 | mov eax,0xff00 |
||
732 | @@: |
||
5175 | IgorA | 733 | mov [ob1],eax |
5153 | IgorA | 734 | end if |
735 | if INTERP_ST eq 1 |
||
5175 | IgorA | 736 | mov eax,[s1] |
737 | mov [s],eax |
||
738 | mov eax,[t1] |
||
739 | mov [t],eax |
||
5153 | IgorA | 740 | end if |
741 | if INTERP_STZ eq 1 |
||
5175 | IgorA | 742 | mov eax,[sz1] |
743 | mov [s_z],eax |
||
744 | mov eax,[tz1] |
||
745 | mov [t_z],eax |
||
5153 | IgorA | 746 | end if |
5187 | IgorA | 747 | |
748 | align 4 |
||
5175 | IgorA | 749 | .cycle_1: ;while (n>=3) |
5922 | IgorA | 750 | if INTERP_RGB eq 1 |
751 | cmp dword[n],5 |
||
752 | jl .cycle_2 |
||
753 | else |
||
5187 | IgorA | 754 | cmp dword[n],3 |
755 | jl .cycle_2 |
||
5922 | IgorA | 756 | end if |
5175 | IgorA | 757 | PUT_PIXEL 0 |
758 | PUT_PIXEL 1 |
||
759 | PUT_PIXEL 2 |
||
760 | PUT_PIXEL 3 |
||
5153 | IgorA | 761 | if INTERP_Z eq 1 |
5175 | IgorA | 762 | add dword[pz],8 ;=4*sizeof(uint) |
5153 | IgorA | 763 | end if |
5175 | IgorA | 764 | add edi,4*PSZB |
765 | sub dword[n],4 |
||
5187 | IgorA | 766 | jmp .cycle_1 |
5175 | IgorA | 767 | .cycle_2: ;while (n>=0) |
5939 | IgorA | 768 | cmp dword[n],0 |
769 | jl .cycle_2_end |
||
5922 | IgorA | 770 | if INTERP_RGB eq 1 |
771 | ; коректирование испорченных пикселей (в конце линии) |
||
772 | bt dword[or1],31 |
||
773 | jnc @f |
||
774 | mov dword[or1],0 |
||
775 | jmp .end_r |
||
776 | @@: |
||
777 | bt dword[or1],16 |
||
778 | jnc .end_r |
||
779 | mov dword[or1],0xff00 |
||
780 | .end_r: |
||
781 | bt dword[og1],31 |
||
782 | jnc @f |
||
783 | mov dword[og1],0 |
||
784 | jmp .end_g |
||
785 | @@: |
||
786 | bt dword[og1],16 |
||
787 | jnc .end_g |
||
788 | mov dword[og1],0xff00 |
||
789 | .end_g: |
||
790 | bt dword[ob1],31 |
||
791 | jnc @f |
||
792 | mov dword[ob1],0 |
||
793 | jmp .end_b |
||
794 | @@: |
||
795 | bt dword[ob1],16 |
||
796 | jnc .end_b |
||
797 | mov dword[ob1],0xff00 |
||
798 | .end_b: |
||
799 | end if |
||
5175 | IgorA | 800 | PUT_PIXEL 0 |
5153 | IgorA | 801 | if INTERP_Z eq 1 |
5175 | IgorA | 802 | add dword[pz],2 ;=sizeof(uint) |
5153 | IgorA | 803 | end if |
5175 | IgorA | 804 | add edi,PSZB |
805 | dec dword[n] |
||
5187 | IgorA | 806 | jmp .cycle_2 |
807 | .cycle_2_end: |
||
808 | end if ;проверка от макроса DRAW_LINE |
||
5175 | IgorA | 809 | |
810 | ; left edge |
||
811 | mov eax,[derror] |
||
812 | add [error],eax |
||
5187 | IgorA | 813 | cmp dword[error],0 ;if (error > 0) |
5175 | IgorA | 814 | jle .els_er |
815 | sub dword[error],0x10000 |
||
816 | mov eax,[dxdy_max] |
||
817 | add [x1],eax |
||
5153 | IgorA | 818 | if INTERP_Z eq 1 |
5175 | IgorA | 819 | mov eax,[dzdl_max] |
820 | add [z1],eax |
||
5153 | IgorA | 821 | end if |
822 | if INTERP_RGB eq 1 |
||
5175 | IgorA | 823 | mov eax,[drdl_max] |
824 | add [r1],eax |
||
825 | mov eax,[dgdl_max] |
||
826 | add [g1],eax |
||
827 | mov eax,[dbdl_max] |
||
828 | add [b1],eax |
||
5153 | IgorA | 829 | end if |
830 | if INTERP_ST eq 1 |
||
5175 | IgorA | 831 | mov eax,[dsdl_max] |
832 | add [s1],eax |
||
833 | mov eax,[dtdl_max] |
||
834 | add [t1],eax |
||
5153 | IgorA | 835 | end if |
836 | if INTERP_STZ eq 1 |
||
5175 | IgorA | 837 | fld dword[dszdl_max] |
838 | fadd dword[sz1] |
||
839 | fstp dword[sz1] |
||
840 | fld dword[dtzdl_max] |
||
841 | fadd dword[tz1] |
||
842 | fstp dword[tz1] |
||
5153 | IgorA | 843 | end if |
5175 | IgorA | 844 | jmp .end_er |
845 | .els_er: |
||
846 | mov eax,[dxdy_min] |
||
847 | add [x1],eax |
||
5153 | IgorA | 848 | if INTERP_Z eq 1 |
5175 | IgorA | 849 | mov eax,[dzdl_min] |
850 | add [z1],eax |
||
5153 | IgorA | 851 | end if |
852 | if INTERP_RGB eq 1 |
||
5175 | IgorA | 853 | mov eax,[drdl_min] |
854 | add [r1],eax |
||
855 | mov eax,[dgdl_min] |
||
856 | add [g1],eax |
||
857 | mov eax,[dbdl_min] |
||
858 | add [b1],eax |
||
5153 | IgorA | 859 | end if |
860 | if INTERP_ST eq 1 |
||
5175 | IgorA | 861 | mov eax,[dsdl_min] |
862 | add [s1],eax |
||
863 | mov eax,[dtdl_min] |
||
864 | add [t1],eax |
||
5153 | IgorA | 865 | end if |
866 | if INTERP_STZ eq 1 |
||
5175 | IgorA | 867 | fld dword[dszdl_min] |
868 | fadd dword[sz1] |
||
869 | fstp dword[sz1] |
||
870 | fld dword[dtzdl_min] |
||
871 | fadd dword[tz1] |
||
872 | fstp dword[tz1] |
||
5153 | IgorA | 873 | end if |
5175 | IgorA | 874 | .end_er: |
875 | ; right edge |
||
876 | mov eax,[dx2dy2] |
||
877 | add [x2],eax |
||
878 | |||
879 | ; screen coordinates |
||
880 | mov ebx,[zb] |
||
881 | mov eax,[ebx+offs_zbuf_linesize] |
||
882 | add [pp1],eax |
||
883 | mov eax,[ebx+offs_zbuf_xsize] |
||
884 | shl eax,1 |
||
885 | add [pz1],eax |
||
886 | jmp .beg_w_lin |
||
887 | .end_w_lin: |
||
888 | inc dword[part] |
||
889 | cmp dword[part],2 |
||
890 | jl .cycle_0 |
||
891 | .end_f: |
||
5187 | IgorA | 892 | popad |
5175 | IgorA | 893 | ret |
894 | endp |
||
895 | |||
5153 | IgorA | 896 | restore INTERP_Z |
897 | restore INTERP_RGB |
||
898 | restore INTERP_ST |
||
899 | restore INTERP_STZ |
||
5175 | IgorA | 900 | restore DRAW_LINE_M |
5153 | IgorA | 901 | |
902 | purge DRAW_INIT |
||
5175 | IgorA | 903 | purge DRAW_LINE |
5153 | IgorA | 904 | purge PUT_PIXEL><>><>><>><>><>> |