Rev 57 | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
135 | giacomo | 1 | /* $Id: s_aaline.c,v 1.2 2003-04-24 14:22:20 giacomo Exp $ */ |
57 | pj | 2 | |
3 | /* |
||
4 | * Mesa 3-D graphics library |
||
5 | * Version: 4.1 |
||
6 | * |
||
7 | * Copyright (C) 1999-2002 Brian Paul All Rights Reserved. |
||
8 | * |
||
9 | * Permission is hereby granted, free of charge, to any person obtaining a |
||
10 | * copy of this software and associated documentation files (the "Software"), |
||
11 | * to deal in the Software without restriction, including without limitation |
||
12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
||
13 | * and/or sell copies of the Software, and to permit persons to whom the |
||
14 | * Software is furnished to do so, subject to the following conditions: |
||
15 | * |
||
16 | * The above copyright notice and this permission notice shall be included |
||
17 | * in all copies or substantial portions of the Software. |
||
18 | * |
||
19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
||
20 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
||
21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
||
22 | * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
||
23 | * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
||
24 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
||
25 | */ |
||
26 | |||
27 | |||
28 | #include "glheader.h" |
||
29 | #include "swrast/s_aaline.h" |
||
30 | #include "swrast/s_context.h" |
||
31 | #include "swrast/s_span.h" |
||
32 | #include "swrast/swrast.h" |
||
33 | #include "mtypes.h" |
||
34 | #include "mmath.h" |
||
35 | |||
36 | |||
37 | #define SUB_PIXEL 4 |
||
38 | |||
39 | |||
40 | /* |
||
41 | * Info about the AA line we're rendering |
||
42 | */ |
||
43 | struct LineInfo |
||
44 | { |
||
45 | GLfloat x0, y0; /* start */ |
||
46 | GLfloat x1, y1; /* end */ |
||
47 | GLfloat dx, dy; /* direction vector */ |
||
48 | GLfloat len; /* length */ |
||
49 | GLfloat halfWidth; /* half of line width */ |
||
50 | GLfloat xAdj, yAdj; /* X and Y adjustment for quad corners around line */ |
||
51 | /* for coverage computation */ |
||
52 | GLfloat qx0, qy0; /* quad vertices */ |
||
53 | GLfloat qx1, qy1; |
||
54 | GLfloat qx2, qy2; |
||
55 | GLfloat qx3, qy3; |
||
56 | GLfloat ex0, ey0; /* quad edge vectors */ |
||
57 | GLfloat ex1, ey1; |
||
58 | GLfloat ex2, ey2; |
||
59 | GLfloat ex3, ey3; |
||
60 | |||
61 | /* DO_Z */ |
||
62 | GLfloat zPlane[4]; |
||
63 | /* DO_FOG */ |
||
64 | GLfloat fPlane[4]; |
||
65 | /* DO_RGBA */ |
||
66 | GLfloat rPlane[4], gPlane[4], bPlane[4], aPlane[4]; |
||
67 | /* DO_INDEX */ |
||
68 | GLfloat iPlane[4]; |
||
69 | /* DO_SPEC */ |
||
70 | GLfloat srPlane[4], sgPlane[4], sbPlane[4]; |
||
71 | /* DO_TEX or DO_MULTITEX */ |
||
72 | GLfloat sPlane[MAX_TEXTURE_UNITS][4]; |
||
73 | GLfloat tPlane[MAX_TEXTURE_UNITS][4]; |
||
74 | GLfloat uPlane[MAX_TEXTURE_UNITS][4]; |
||
75 | GLfloat vPlane[MAX_TEXTURE_UNITS][4]; |
||
76 | GLfloat lambda[MAX_TEXTURE_UNITS]; |
||
77 | GLfloat texWidth[MAX_TEXTURE_UNITS], texHeight[MAX_TEXTURE_UNITS]; |
||
78 | |||
79 | struct sw_span span; |
||
80 | }; |
||
81 | |||
82 | |||
83 | |||
84 | /* |
||
85 | * Compute the equation of a plane used to interpolate line fragment data |
||
86 | * such as color, Z, texture coords, etc. |
||
87 | * Input: (x0, y0) and (x1,y1) are the endpoints of the line. |
||
88 | * z0, and z1 are the end point values to interpolate. |
||
89 | * Output: plane - the plane equation. |
||
90 | * |
||
91 | * Note: we don't really have enough parameters to specify a plane. |
||
92 | * We take the endpoints of the line and compute a plane such that |
||
93 | * the cross product of the line vector and the plane normal is |
||
94 | * parallel to the projection plane. |
||
95 | */ |
||
96 | static void |
||
97 | compute_plane(GLfloat x0, GLfloat y0, GLfloat x1, GLfloat y1, |
||
98 | GLfloat z0, GLfloat z1, GLfloat plane[4]) |
||
99 | { |
||
100 | #if 0 |
||
101 | /* original */ |
||
102 | const GLfloat px = x1 - x0; |
||
103 | const GLfloat py = y1 - y0; |
||
104 | const GLfloat pz = z1 - z0; |
||
105 | const GLfloat qx = -py; |
||
106 | const GLfloat qy = px; |
||
107 | const GLfloat qz = 0; |
||
108 | const GLfloat a = py * qz - pz * qy; |
||
109 | const GLfloat b = pz * qx - px * qz; |
||
110 | const GLfloat c = px * qy - py * qx; |
||
111 | const GLfloat d = -(a * x0 + b * y0 + c * z0); |
||
112 | plane[0] = a; |
||
113 | plane[1] = b; |
||
114 | plane[2] = c; |
||
115 | plane[3] = d; |
||
116 | #else |
||
117 | /* simplified */ |
||
118 | const GLfloat px = x1 - x0; |
||
119 | const GLfloat py = y1 - y0; |
||
120 | const GLfloat pz = z0 - z1; |
||
121 | const GLfloat a = pz * px; |
||
122 | const GLfloat b = pz * py; |
||
123 | const GLfloat c = px * px + py * py; |
||
124 | const GLfloat d = -(a * x0 + b * y0 + c * z0); |
||
125 | if (a == 0.0 && b == 0.0 && c == 0.0 && d == 0.0) { |
||
126 | plane[0] = 0.0; |
||
127 | plane[1] = 0.0; |
||
128 | plane[2] = 1.0; |
||
129 | plane[3] = 0.0; |
||
130 | } |
||
131 | else { |
||
132 | plane[0] = a; |
||
133 | plane[1] = b; |
||
134 | plane[2] = c; |
||
135 | plane[3] = d; |
||
136 | } |
||
137 | #endif |
||
138 | } |
||
139 | |||
140 | |||
141 | static INLINE void |
||
142 | constant_plane(GLfloat value, GLfloat plane[4]) |
||
143 | { |
||
144 | plane[0] = 0.0; |
||
145 | plane[1] = 0.0; |
||
146 | plane[2] = -1.0; |
||
147 | plane[3] = value; |
||
148 | } |
||
149 | |||
150 | |||
151 | static INLINE GLfloat |
||
152 | solve_plane(GLfloat x, GLfloat y, const GLfloat plane[4]) |
||
153 | { |
||
154 | const GLfloat z = (plane[3] + plane[0] * x + plane[1] * y) / -plane[2]; |
||
155 | return z; |
||
156 | } |
||
157 | |||
158 | #define SOLVE_PLANE(X, Y, PLANE) \ |
||
159 | ((PLANE[3] + PLANE[0] * (X) + PLANE[1] * (Y)) / -PLANE[2]) |
||
160 | |||
161 | |||
162 | /* |
||
163 | * Return 1 / solve_plane(). |
||
164 | */ |
||
165 | static INLINE GLfloat |
||
166 | solve_plane_recip(GLfloat x, GLfloat y, const GLfloat plane[4]) |
||
167 | { |
||
168 | const GLfloat denom = plane[3] + plane[0] * x + plane[1] * y; |
||
169 | if (denom == 0.0) |
||
170 | return 0.0; |
||
171 | else |
||
172 | return -plane[2] / denom; |
||
173 | } |
||
174 | |||
175 | |||
176 | /* |
||
177 | * Solve plane and return clamped GLchan value. |
||
178 | */ |
||
179 | static INLINE GLchan |
||
180 | solve_plane_chan(GLfloat x, GLfloat y, const GLfloat plane[4]) |
||
181 | { |
||
182 | GLfloat z = (plane[3] + plane[0] * x + plane[1] * y) / -plane[2] + 0.5F; |
||
183 | if (z < 0.0F) |
||
184 | return 0; |
||
185 | else if (z > CHAN_MAXF) |
||
186 | return (GLchan) CHAN_MAXF; |
||
187 | return (GLchan) (GLint) z; |
||
188 | } |
||
189 | |||
190 | |||
191 | /* |
||
192 | * Compute mipmap level of detail. |
||
193 | */ |
||
194 | static INLINE GLfloat |
||
195 | compute_lambda(const GLfloat sPlane[4], const GLfloat tPlane[4], |
||
196 | GLfloat invQ, GLfloat width, GLfloat height) |
||
197 | { |
||
198 | GLfloat dudx = sPlane[0] / sPlane[2] * invQ * width; |
||
199 | GLfloat dudy = sPlane[1] / sPlane[2] * invQ * width; |
||
200 | GLfloat dvdx = tPlane[0] / tPlane[2] * invQ * height; |
||
201 | GLfloat dvdy = tPlane[1] / tPlane[2] * invQ * height; |
||
202 | GLfloat r1 = dudx * dudx + dudy * dudy; |
||
203 | GLfloat r2 = dvdx * dvdx + dvdy * dvdy; |
||
204 | GLfloat rho2 = r1 + r2; |
||
205 | /* return log base 2 of rho */ |
||
206 | if (rho2 == 0.0F) |
||
207 | return 0.0; |
||
208 | else |
||
209 | return (GLfloat) (log(rho2) * 1.442695 * 0.5);/* 1.442695 = 1/log(2) */ |
||
210 | } |
||
211 | |||
212 | |||
213 | |||
214 | |||
215 | /* |
||
216 | * Fill in the samples[] array with the (x,y) subpixel positions of |
||
217 | * xSamples * ySamples sample positions. |
||
218 | * Note that the four corner samples are put into the first four |
||
219 | * positions of the array. This allows us to optimize for the common |
||
220 | * case of all samples being inside the polygon. |
||
221 | */ |
||
222 | static void |
||
223 | make_sample_table(GLint xSamples, GLint ySamples, GLfloat samples[][2]) |
||
224 | { |
||
225 | const GLfloat dx = 1.0F / (GLfloat) xSamples; |
||
226 | const GLfloat dy = 1.0F / (GLfloat) ySamples; |
||
227 | GLint x, y; |
||
228 | GLint i; |
||
229 | |||
230 | i = 4; |
||
231 | for (x = 0; x < xSamples; x++) { |
||
232 | for (y = 0; y < ySamples; y++) { |
||
233 | GLint j; |
||
234 | if (x == 0 && y == 0) { |
||
235 | /* lower left */ |
||
236 | j = 0; |
||
237 | } |
||
238 | else if (x == xSamples - 1 && y == 0) { |
||
239 | /* lower right */ |
||
240 | j = 1; |
||
241 | } |
||
242 | else if (x == 0 && y == ySamples - 1) { |
||
243 | /* upper left */ |
||
244 | j = 2; |
||
245 | } |
||
246 | else if (x == xSamples - 1 && y == ySamples - 1) { |
||
247 | /* upper right */ |
||
248 | j = 3; |
||
249 | } |
||
250 | else { |
||
251 | j = i++; |
||
252 | } |
||
253 | samples[j][0] = x * dx + 0.5F * dx; |
||
254 | samples[j][1] = y * dy + 0.5F * dy; |
||
255 | } |
||
256 | } |
||
257 | } |
||
258 | |||
259 | |||
260 | |||
261 | /* |
||
262 | * Compute how much of the given pixel's area is inside the rectangle |
||
263 | * defined by vertices v0, v1, v2, v3. |
||
264 | * Vertices MUST be specified in counter-clockwise order. |
||
265 | * Return: coverage in [0, 1]. |
||
266 | */ |
||
267 | static GLfloat |
||
268 | compute_coveragef(const struct LineInfo *info, |
||
269 | GLint winx, GLint winy) |
||
270 | { |
||
271 | static GLfloat samples[SUB_PIXEL * SUB_PIXEL][2]; |
||
272 | static GLboolean haveSamples = GL_FALSE; |
||
273 | const GLfloat x = (GLfloat) winx; |
||
274 | const GLfloat y = (GLfloat) winy; |
||
275 | GLint stop = 4, i; |
||
276 | GLfloat insideCount = SUB_PIXEL * SUB_PIXEL; |
||
277 | |||
278 | if (!haveSamples) { |
||
279 | make_sample_table(SUB_PIXEL, SUB_PIXEL, samples); |
||
280 | haveSamples = GL_TRUE; |
||
281 | } |
||
282 | |||
283 | #if 0 /*DEBUG*/ |
||
284 | { |
||
285 | const GLfloat area = dx0 * dy1 - dx1 * dy0; |
||
286 | assert(area >= 0.0); |
||
287 | } |
||
288 | #endif |
||
289 | |||
290 | for (i = 0; i < stop; i++) { |
||
291 | const GLfloat sx = x + samples[i][0]; |
||
292 | const GLfloat sy = y + samples[i][1]; |
||
293 | const GLfloat fx0 = sx - info->qx0; |
||
294 | const GLfloat fy0 = sy - info->qy0; |
||
295 | const GLfloat fx1 = sx - info->qx1; |
||
296 | const GLfloat fy1 = sy - info->qy1; |
||
297 | const GLfloat fx2 = sx - info->qx2; |
||
298 | const GLfloat fy2 = sy - info->qy2; |
||
299 | const GLfloat fx3 = sx - info->qx3; |
||
300 | const GLfloat fy3 = sy - info->qy3; |
||
301 | /* cross product determines if sample is inside or outside each edge */ |
||
302 | GLfloat cross0 = (info->ex0 * fy0 - info->ey0 * fx0); |
||
303 | GLfloat cross1 = (info->ex1 * fy1 - info->ey1 * fx1); |
||
304 | GLfloat cross2 = (info->ex2 * fy2 - info->ey2 * fx2); |
||
305 | GLfloat cross3 = (info->ex3 * fy3 - info->ey3 * fx3); |
||
306 | /* Check if the sample is exactly on an edge. If so, let cross be a |
||
307 | * positive or negative value depending on the direction of the edge. |
||
308 | */ |
||
309 | if (cross0 == 0.0F) |
||
310 | cross0 = info->ex0 + info->ey0; |
||
311 | if (cross1 == 0.0F) |
||
312 | cross1 = info->ex1 + info->ey1; |
||
313 | if (cross2 == 0.0F) |
||
314 | cross2 = info->ex2 + info->ey2; |
||
315 | if (cross3 == 0.0F) |
||
316 | cross3 = info->ex3 + info->ey3; |
||
317 | if (cross0 < 0.0F || cross1 < 0.0F || cross2 < 0.0F || cross3 < 0.0F) { |
||
318 | /* point is outside quadrilateral */ |
||
319 | insideCount -= 1.0F; |
||
320 | stop = SUB_PIXEL * SUB_PIXEL; |
||
321 | } |
||
322 | } |
||
323 | if (stop == 4) |
||
324 | return 1.0F; |
||
325 | else |
||
326 | return insideCount * (1.0F / (SUB_PIXEL * SUB_PIXEL)); |
||
327 | } |
||
328 | |||
329 | |||
330 | |||
331 | typedef void (*plot_func)(GLcontext *ctx, struct LineInfo *line, |
||
332 | int ix, int iy); |
||
333 | |||
334 | |||
335 | |||
336 | /* |
||
337 | * Draw an AA line segment (called many times per line when stippling) |
||
338 | */ |
||
339 | static void |
||
340 | segment(GLcontext *ctx, |
||
341 | struct LineInfo *line, |
||
342 | plot_func plot, |
||
343 | GLfloat t0, GLfloat t1) |
||
344 | { |
||
345 | const GLfloat absDx = (line->dx < 0.0F) ? -line->dx : line->dx; |
||
346 | const GLfloat absDy = (line->dy < 0.0F) ? -line->dy : line->dy; |
||
347 | /* compute the actual segment's endpoints */ |
||
348 | const GLfloat x0 = line->x0 + t0 * line->dx; |
||
349 | const GLfloat y0 = line->y0 + t0 * line->dy; |
||
350 | const GLfloat x1 = line->x0 + t1 * line->dx; |
||
351 | const GLfloat y1 = line->y0 + t1 * line->dy; |
||
352 | |||
353 | /* compute vertices of the line-aligned quadrilateral */ |
||
354 | line->qx0 = x0 - line->yAdj; |
||
355 | line->qy0 = y0 + line->xAdj; |
||
356 | line->qx1 = x0 + line->yAdj; |
||
357 | line->qy1 = y0 - line->xAdj; |
||
358 | line->qx2 = x1 + line->yAdj; |
||
359 | line->qy2 = y1 - line->xAdj; |
||
360 | line->qx3 = x1 - line->yAdj; |
||
361 | line->qy3 = y1 + line->xAdj; |
||
362 | /* compute the quad's edge vectors (for coverage calc) */ |
||
363 | line->ex0 = line->qx1 - line->qx0; |
||
364 | line->ey0 = line->qy1 - line->qy0; |
||
365 | line->ex1 = line->qx2 - line->qx1; |
||
366 | line->ey1 = line->qy2 - line->qy1; |
||
367 | line->ex2 = line->qx3 - line->qx2; |
||
368 | line->ey2 = line->qy3 - line->qy2; |
||
369 | line->ex3 = line->qx0 - line->qx3; |
||
370 | line->ey3 = line->qy0 - line->qy3; |
||
371 | |||
372 | if (absDx > absDy) { |
||
373 | /* X-major line */ |
||
374 | GLfloat dydx = line->dy / line->dx; |
||
375 | GLfloat xLeft, xRight, yBot, yTop; |
||
376 | GLint ix, ixRight; |
||
377 | if (x0 < x1) { |
||
378 | xLeft = x0 - line->halfWidth; |
||
379 | xRight = x1 + line->halfWidth; |
||
380 | if (line->dy >= 0.0) { |
||
381 | yBot = y0 - 3.0F * line->halfWidth; |
||
382 | yTop = y0 + line->halfWidth; |
||
383 | } |
||
384 | else { |
||
385 | yBot = y0 - line->halfWidth; |
||
386 | yTop = y0 + 3.0F * line->halfWidth; |
||
387 | } |
||
388 | } |
||
389 | else { |
||
390 | xLeft = x1 - line->halfWidth; |
||
391 | xRight = x0 + line->halfWidth; |
||
392 | if (line->dy <= 0.0) { |
||
393 | yBot = y1 - 3.0F * line->halfWidth; |
||
394 | yTop = y1 + line->halfWidth; |
||
395 | } |
||
396 | else { |
||
397 | yBot = y1 - line->halfWidth; |
||
398 | yTop = y1 + 3.0F * line->halfWidth; |
||
399 | } |
||
400 | } |
||
401 | |||
402 | /* scan along the line, left-to-right */ |
||
403 | ixRight = (GLint) (xRight + 1.0F); |
||
404 | |||
405 | /*printf("avg span height: %g\n", yTop - yBot);*/ |
||
406 | for (ix = (GLint) xLeft; ix < ixRight; ix++) { |
||
407 | const GLint iyBot = (GLint) yBot; |
||
408 | const GLint iyTop = (GLint) (yTop + 1.0F); |
||
409 | GLint iy; |
||
410 | /* scan across the line, bottom-to-top */ |
||
411 | for (iy = iyBot; iy < iyTop; iy++) { |
||
412 | (*plot)(ctx, line, ix, iy); |
||
413 | } |
||
414 | yBot += dydx; |
||
415 | yTop += dydx; |
||
416 | } |
||
417 | } |
||
418 | else { |
||
419 | /* Y-major line */ |
||
420 | GLfloat dxdy = line->dx / line->dy; |
||
421 | GLfloat yBot, yTop, xLeft, xRight; |
||
422 | GLint iy, iyTop; |
||
423 | if (y0 < y1) { |
||
424 | yBot = y0 - line->halfWidth; |
||
425 | yTop = y1 + line->halfWidth; |
||
426 | if (line->dx >= 0.0) { |
||
427 | xLeft = x0 - 3.0F * line->halfWidth; |
||
428 | xRight = x0 + line->halfWidth; |
||
429 | } |
||
430 | else { |
||
431 | xLeft = x0 - line->halfWidth; |
||
432 | xRight = x0 + 3.0F * line->halfWidth; |
||
433 | } |
||
434 | } |
||
435 | else { |
||
436 | yBot = y1 - line->halfWidth; |
||
437 | yTop = y0 + line->halfWidth; |
||
438 | if (line->dx <= 0.0) { |
||
439 | xLeft = x1 - 3.0F * line->halfWidth; |
||
440 | xRight = x1 + line->halfWidth; |
||
441 | } |
||
442 | else { |
||
443 | xLeft = x1 - line->halfWidth; |
||
444 | xRight = x1 + 3.0F * line->halfWidth; |
||
445 | } |
||
446 | } |
||
447 | |||
448 | /* scan along the line, bottom-to-top */ |
||
449 | iyTop = (GLint) (yTop + 1.0F); |
||
450 | |||
451 | /*printf("avg span width: %g\n", xRight - xLeft);*/ |
||
452 | for (iy = (GLint) yBot; iy < iyTop; iy++) { |
||
453 | const GLint ixLeft = (GLint) xLeft; |
||
454 | const GLint ixRight = (GLint) (xRight + 1.0F); |
||
455 | GLint ix; |
||
456 | /* scan across the line, left-to-right */ |
||
457 | for (ix = ixLeft; ix < ixRight; ix++) { |
||
458 | (*plot)(ctx, line, ix, iy); |
||
459 | } |
||
460 | xLeft += dxdy; |
||
461 | xRight += dxdy; |
||
462 | } |
||
463 | } |
||
464 | } |
||
465 | |||
466 | |||
467 | #define NAME(x) aa_ci_##x |
||
468 | #define DO_Z |
||
469 | #define DO_FOG |
||
470 | #define DO_INDEX |
||
135 | giacomo | 471 | #include "s_aatempline.h" |
57 | pj | 472 | |
473 | |||
474 | #define NAME(x) aa_rgba_##x |
||
475 | #define DO_Z |
||
476 | #define DO_FOG |
||
477 | #define DO_RGBA |
||
135 | giacomo | 478 | #include "s_aatempline.h" |
57 | pj | 479 | |
480 | |||
481 | #define NAME(x) aa_tex_rgba_##x |
||
482 | #define DO_Z |
||
483 | #define DO_FOG |
||
484 | #define DO_RGBA |
||
485 | #define DO_TEX |
||
135 | giacomo | 486 | #include "s_aatempline.h" |
57 | pj | 487 | |
488 | |||
489 | #define NAME(x) aa_multitex_rgba_##x |
||
490 | #define DO_Z |
||
491 | #define DO_FOG |
||
492 | #define DO_RGBA |
||
493 | #define DO_MULTITEX |
||
135 | giacomo | 494 | #include "s_aatempline.h" |
57 | pj | 495 | |
496 | |||
497 | #define NAME(x) aa_multitex_spec_##x |
||
498 | #define DO_Z |
||
499 | #define DO_FOG |
||
500 | #define DO_RGBA |
||
501 | #define DO_MULTITEX |
||
502 | #define DO_SPEC |
||
135 | giacomo | 503 | #include "s_aatempline.h" |
57 | pj | 504 | |
505 | |||
506 | |||
507 | void |
||
508 | _swrast_choose_aa_line_function(GLcontext *ctx) |
||
509 | { |
||
510 | SWcontext *swrast = SWRAST_CONTEXT(ctx); |
||
511 | |||
512 | ASSERT(ctx->Line.SmoothFlag); |
||
513 | |||
514 | if (ctx->Visual.rgbMode) { |
||
515 | /* RGBA */ |
||
516 | if (ctx->Texture._EnabledUnits != 0) { |
||
517 | if (ctx->Texture._EnabledUnits > 1) { |
||
518 | /* Multitextured! */ |
||
519 | if (ctx->Light.Model.ColorControl==GL_SEPARATE_SPECULAR_COLOR || |
||
520 | ctx->Fog.ColorSumEnabled) |
||
521 | swrast->Line = aa_multitex_spec_line; |
||
522 | else |
||
523 | swrast->Line = aa_multitex_rgba_line; |
||
524 | } |
||
525 | else { |
||
526 | swrast->Line = aa_tex_rgba_line; |
||
527 | } |
||
528 | } |
||
529 | else { |
||
530 | swrast->Line = aa_rgba_line; |
||
531 | } |
||
532 | } |
||
533 | else { |
||
534 | /* Color Index */ |
||
535 | swrast->Line = aa_ci_line; |
||
536 | } |
||
537 | } |