source: trunk/src/opengl/mesa/points.c@ 3232

Last change on this file since 3232 was 2962, checked in by jeroen, 26 years ago

* empty log message *
File size: 38.4 KB
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1/* $Id: points.c,v 1.2 2000-03-01 18:49:34 jeroen Exp $ */
2
3/*
4 * Mesa 3-D graphics library
5 * Version: 3.1
6 *
7 * Copyright (C) 1999 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/* $XFree86: xc/lib/GL/mesa/src/points.c,v 1.4 1999/04/04 00:20:29 dawes Exp $ */
27
28
29
30#ifdef PC_HEADER
31#include "all.h"
32#else
33#ifndef XFree86Server
34#include <math.h>
35#else
36#include "GL/xf86glx.h"
37#endif
38#include "types.h"
39#include "context.h"
40#include "feedback.h"
41#include "macros.h"
42#include "mmath.h"
43#include "pb.h"
44#include "points.h"
45#include "span.h"
46#include "texstate.h"
47#include "vb.h"
48#include "mmath.h"
49#endif
50
51
52
53void gl_PointSize( GLcontext *ctx, GLfloat size )
54{
55 if (size<=0.0) {
56 gl_error( ctx, GL_INVALID_VALUE, "glPointSize" );
57 return;
58 }
59 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPointSize");
60
61 if (ctx->Point.Size != size) {
62 ctx->Point.Size = size;
63 ctx->TriangleCaps &= ~DD_POINT_SIZE;
64 if (size != 1.0) ctx->TriangleCaps |= DD_POINT_SIZE;
65 ctx->NewState |= NEW_RASTER_OPS;
66 }
67}
68
69
70
71void gl_PointParameterfvEXT( GLcontext *ctx, GLenum pname,
72 const GLfloat *params)
73{
74 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPointParameterfvEXT");
75 if(pname==GL_DISTANCE_ATTENUATION_EXT) {
76 GLboolean tmp = ctx->Point.Attenuated;
77 COPY_3V(ctx->Point.Params,params);
78 ctx->Point.Attenuated = (params[0] != 1.0 ||
79 params[1] != 0.0 ||
80 params[2] != 0.0);
81
82 if (tmp != ctx->Point.Attenuated) {
83 ctx->Enabled ^= ENABLE_POINT_ATTEN;
84 ctx->TriangleCaps ^= DD_POINT_ATTEN;
85 ctx->NewState |= NEW_RASTER_OPS;
86 }
87 } else {
88 if (*params<0.0 ) {
89 gl_error( ctx, GL_INVALID_VALUE, "glPointParameterfvEXT" );
90 return;
91 }
92 switch (pname) {
93 case GL_POINT_SIZE_MIN_EXT:
94 ctx->Point.MinSize=*params;
95 break;
96 case GL_POINT_SIZE_MAX_EXT:
97 ctx->Point.MaxSize=*params;
98 break;
99 case GL_POINT_FADE_THRESHOLD_SIZE_EXT:
100 ctx->Point.Threshold=*params;
101 break;
102 default:
103 gl_error( ctx, GL_INVALID_ENUM, "glPointParameterfvEXT" );
104 return;
105 }
106 }
107 ctx->NewState |= NEW_RASTER_OPS;
108}
109
110
111/**********************************************************************/
112/***** Rasterization *****/
113/**********************************************************************/
114
115
116/*
117 * There are 3 pairs (RGBA, CI) of point rendering functions:
118 * 1. simple: size=1 and no special rasterization functions (fastest)
119 * 2. size1: size=1 and any rasterization functions
120 * 3. general: any size and rasterization functions (slowest)
121 *
122 * All point rendering functions take the same two arguments: first and
123 * last which specify that the points specified by VB[first] through
124 * VB[last] are to be rendered.
125 */
126
127
128
129
130
131/*
132 * CI points with size == 1.0
133 */
134static void size1_ci_points( GLcontext *ctx, GLuint first, GLuint last )
135{
136 struct vertex_buffer *VB = ctx->VB;
137 struct pixel_buffer *PB = ctx->PB;
138 GLfloat *win;
139 GLint *pbx = PB->x, *pby = PB->y;
140 GLdepth *pbz = PB->z;
141 GLuint *pbi = PB->i;
142 GLuint pbcount = PB->count;
143 GLuint i;
144
145 win = &VB->Win.data[first][0];
146 for (i=first;i<=last;i++) {
147 if (VB->ClipMask[i]==0) {
148 pbx[pbcount] = (GLint) win[0];
149 pby[pbcount] = (GLint) win[1];
150 pbz[pbcount] = (GLint) (win[2] + ctx->PointZoffset);
151 pbi[pbcount] = VB->IndexPtr->data[i];
152 pbcount++;
153 }
154 win += 3;
155 }
156 PB->count = pbcount;
157 PB_CHECK_FLUSH(ctx, PB);
158}
159
160
161
162/*
163 * RGBA points with size == 1.0
164 */
165static void size1_rgba_points( GLcontext *ctx, GLuint first, GLuint last )
166{
167 struct vertex_buffer *VB = ctx->VB;
168 struct pixel_buffer *PB = ctx->PB;
169 GLuint i;
170
171 for (i=first;i<=last;i++) {
172 if (VB->ClipMask[i]==0) {
173 GLint x, y, z;
174 GLint red, green, blue, alpha;
175
176 x = (GLint) VB->Win.data[i][0];
177 y = (GLint) VB->Win.data[i][1];
178 z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
179
180 red = VB->ColorPtr->data[i][0];
181 green = VB->ColorPtr->data[i][1];
182 blue = VB->ColorPtr->data[i][2];
183 alpha = VB->ColorPtr->data[i][3];
184
185 PB_WRITE_RGBA_PIXEL( PB, x, y, z, red, green, blue, alpha );
186 }
187 }
188 PB_CHECK_FLUSH(ctx,PB);
189}
190
191
192
193/*
194 * General CI points.
195 */
196static void general_ci_points( GLcontext *ctx, GLuint first, GLuint last )
197{
198 struct vertex_buffer *VB = ctx->VB;
199 struct pixel_buffer *PB = ctx->PB;
200 GLuint i;
201 GLint isize = (GLint) (CLAMP(ctx->Point.Size,MIN_POINT_SIZE,MAX_POINT_SIZE) + 0.5F);
202 GLint radius = isize >> 1;
203
204 for (i=first;i<=last;i++) {
205 if (VB->ClipMask[i]==0) {
206 GLint x, y, z;
207 GLint x0, x1, y0, y1;
208 GLint ix, iy;
209
210 x = (GLint) VB->Win.data[i][0];
211 y = (GLint) VB->Win.data[i][1];
212 z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
213
214 if (isize & 1) {
215 /* odd size */
216 x0 = x - radius;
217 x1 = x + radius;
218 y0 = y - radius;
219 y1 = y + radius;
220 }
221 else {
222 /* even size */
223 x0 = (GLint) (x + 1.5F) - radius;
224 x1 = x0 + isize - 1;
225 y0 = (GLint) (y + 1.5F) - radius;
226 y1 = y0 + isize - 1;
227 }
228
229 PB_SET_INDEX( ctx, PB, VB->IndexPtr->data[i] );
230
231 for (iy=y0;iy<=y1;iy++) {
232 for (ix=x0;ix<=x1;ix++) {
233 PB_WRITE_PIXEL( PB, ix, iy, z );
234 }
235 }
236 PB_CHECK_FLUSH(ctx,PB);
237 }
238 }
239}
240
241
242/*
243 * General RGBA points.
244 */
245static void general_rgba_points( GLcontext *ctx, GLuint first, GLuint last )
246{
247 struct vertex_buffer *VB = ctx->VB;
248 struct pixel_buffer *PB = ctx->PB;
249 GLuint i;
250 GLint isize = (GLint) (CLAMP(ctx->Point.Size,MIN_POINT_SIZE,MAX_POINT_SIZE) + 0.5F);
251 GLint radius = isize >> 1;
252
253 for (i=first;i<=last;i++) {
254 if (VB->ClipMask[i]==0) {
255 GLint x, y, z;
256 GLint x0, x1, y0, y1;
257 GLint ix, iy;
258
259 x = (GLint) VB->Win.data[i][0];
260 y = (GLint) VB->Win.data[i][1];
261 z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
262
263 if (isize & 1) {
264 /* odd size */
265 x0 = x - radius;
266 x1 = x + radius;
267 y0 = y - radius;
268 y1 = y + radius;
269 }
270 else {
271 /* even size */
272 x0 = (GLint) (x + 1.5F) - radius;
273 x1 = x0 + isize - 1;
274 y0 = (GLint) (y + 1.5F) - radius;
275 y1 = y0 + isize - 1;
276 }
277
278 PB_SET_COLOR( ctx, PB,
279 VB->ColorPtr->data[i][0],
280 VB->ColorPtr->data[i][1],
281 VB->ColorPtr->data[i][2],
282 VB->ColorPtr->data[i][3] );
283
284 for (iy=y0;iy<=y1;iy++) {
285 for (ix=x0;ix<=x1;ix++) {
286 PB_WRITE_PIXEL( PB, ix, iy, z );
287 }
288 }
289 PB_CHECK_FLUSH(ctx,PB);
290 }
291 }
292}
293
294
295
296
297/*
298 * Textured RGBA points.
299 */
300static void textured_rgba_points( GLcontext *ctx, GLuint first, GLuint last )
301{
302 struct vertex_buffer *VB = ctx->VB;
303 struct pixel_buffer *PB = ctx->PB;
304 GLuint i;
305
306 for (i=first;i<=last;i++) {
307 if (VB->ClipMask[i]==0) {
308 GLint x, y, z;
309 GLint x0, x1, y0, y1;
310 GLint ix, iy;
311 GLint isize, radius;
312 GLint red, green, blue, alpha;
313 GLfloat s, t, u;
314
315 x = (GLint) VB->Win.data[i][0];
316 y = (GLint) VB->Win.data[i][1];
317 z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
318
319 isize = (GLint)
320 (CLAMP(ctx->Point.Size,MIN_POINT_SIZE,MAX_POINT_SIZE) + 0.5F);
321 if (isize<1) {
322 isize = 1;
323 }
324 radius = isize >> 1;
325
326 if (isize & 1) {
327 /* odd size */
328 x0 = x - radius;
329 x1 = x + radius;
330 y0 = y - radius;
331 y1 = y + radius;
332 }
333 else {
334 /* even size */
335 x0 = (GLint) (x + 1.5F) - radius;
336 x1 = x0 + isize - 1;
337 y0 = (GLint) (y + 1.5F) - radius;
338 y1 = y0 + isize - 1;
339 }
340
341 red = VB->ColorPtr->data[i][0];
342 green = VB->ColorPtr->data[i][1];
343 blue = VB->ColorPtr->data[i][2];
344 alpha = VB->ColorPtr->data[i][3];
345
346 switch (VB->TexCoordPtr[0]->size) {
347 case 4:
348 s = VB->TexCoordPtr[0]->data[i][0]/VB->TexCoordPtr[0]->data[i][3];
349 t = VB->TexCoordPtr[0]->data[i][1]/VB->TexCoordPtr[0]->data[i][3];
350 u = VB->TexCoordPtr[0]->data[i][2]/VB->TexCoordPtr[0]->data[i][3];
351 break;
352 case 3:
353 s = VB->TexCoordPtr[0]->data[i][0];
354 t = VB->TexCoordPtr[0]->data[i][1];
355 u = VB->TexCoordPtr[0]->data[i][2];
356 break;
357 case 2:
358 s = VB->TexCoordPtr[0]->data[i][0];
359 t = VB->TexCoordPtr[0]->data[i][1];
360 u = 0.0;
361 break;
362 case 1:
363 s = VB->TexCoordPtr[0]->data[i][0];
364 t = 0.0;
365 u = 0.0;
366 break;
367 default:
368 /* should never get here */
369 s = t = u = 0.0;
370 gl_problem(ctx, "unexpected texcoord size in textured_rgba_points()");
371 }
372
373/* don't think this is needed
374 PB_SET_COLOR( red, green, blue, alpha );
375*/
376
377 for (iy=y0;iy<=y1;iy++) {
378 for (ix=x0;ix<=x1;ix++) {
379 PB_WRITE_TEX_PIXEL( PB, ix, iy, z, red, green, blue, alpha, s, t, u );
380 }
381 }
382 PB_CHECK_FLUSH(ctx,PB);
383 }
384 }
385}
386
387
388/*
389 * Multitextured RGBA points.
390 */
391static void multitextured_rgba_points( GLcontext *ctx, GLuint first, GLuint last )
392{
393 struct vertex_buffer *VB = ctx->VB;
394 struct pixel_buffer *PB = ctx->PB;
395 GLuint i;
396
397 for (i=first;i<=last;i++) {
398 if (VB->ClipMask[i]==0) {
399 GLint x, y, z;
400 GLint x0, x1, y0, y1;
401 GLint ix, iy;
402 GLint isize, radius;
403 GLint red, green, blue, alpha;
404 GLfloat s, t, u;
405 GLfloat s1, t1, u1;
406
407 x = (GLint) VB->Win.data[i][0];
408 y = (GLint) VB->Win.data[i][1];
409 z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
410
411 isize = (GLint)
412 (CLAMP(ctx->Point.Size,MIN_POINT_SIZE,MAX_POINT_SIZE) + 0.5F);
413 if (isize<1) {
414 isize = 1;
415 }
416 radius = isize >> 1;
417
418 if (isize & 1) {
419 /* odd size */
420 x0 = x - radius;
421 x1 = x + radius;
422 y0 = y - radius;
423 y1 = y + radius;
424 }
425 else {
426 /* even size */
427 x0 = (GLint) (x + 1.5F) - radius;
428 x1 = x0 + isize - 1;
429 y0 = (GLint) (y + 1.5F) - radius;
430 y1 = y0 + isize - 1;
431 }
432
433 red = VB->ColorPtr->data[i][0];
434 green = VB->ColorPtr->data[i][1];
435 blue = VB->ColorPtr->data[i][2];
436 alpha = VB->ColorPtr->data[i][3];
437
438 switch (VB->TexCoordPtr[0]->size) {
439 case 4:
440 s = VB->TexCoordPtr[0]->data[i][0]/VB->TexCoordPtr[0]->data[i][3];
441 t = VB->TexCoordPtr[0]->data[i][1]/VB->TexCoordPtr[0]->data[i][3];
442 u = VB->TexCoordPtr[0]->data[i][2]/VB->TexCoordPtr[0]->data[i][3];
443 break;
444 case 3:
445 s = VB->TexCoordPtr[0]->data[i][0];
446 t = VB->TexCoordPtr[0]->data[i][1];
447 u = VB->TexCoordPtr[0]->data[i][2];
448 break;
449 case 2:
450 s = VB->TexCoordPtr[0]->data[i][0];
451 t = VB->TexCoordPtr[0]->data[i][1];
452 u = 0.0;
453 break;
454 case 1:
455 s = VB->TexCoordPtr[0]->data[i][0];
456 t = 0.0;
457 u = 0.0;
458 break;
459 default:
460 /* should never get here */
461 s = t = u = 0.0;
462 gl_problem(ctx, "unexpected texcoord size in multitextured_rgba_points()");
463 }
464
465 switch (VB->TexCoordPtr[1]->size) {
466 case 4:
467 s1 = VB->TexCoordPtr[1]->data[i][0]/VB->TexCoordPtr[1]->data[i][3];
468 t1 = VB->TexCoordPtr[1]->data[i][1]/VB->TexCoordPtr[1]->data[i][3];
469 u1 = VB->TexCoordPtr[1]->data[i][2]/VB->TexCoordPtr[1]->data[i][3];
470 break;
471 case 3:
472 s1 = VB->TexCoordPtr[1]->data[i][0];
473 t1 = VB->TexCoordPtr[1]->data[i][1];
474 u1 = VB->TexCoordPtr[1]->data[i][2];
475 break;
476 case 2:
477 s1 = VB->TexCoordPtr[1]->data[i][0];
478 t1 = VB->TexCoordPtr[1]->data[i][1];
479 u1 = 0.0;
480 break;
481 case 1:
482 s1 = VB->TexCoordPtr[1]->data[i][0];
483 t1 = 0.0;
484 u1 = 0.0;
485 break;
486 default:
487 /* should never get here */
488 s1 = t1 = u1 = 0.0;
489 gl_problem(ctx, "unexpected texcoord size in multitextured_rgba_points()");
490 }
491
492 for (iy=y0;iy<=y1;iy++) {
493 for (ix=x0;ix<=x1;ix++) {
494 PB_WRITE_MULTITEX_PIXEL( PB, ix, iy, z, red, green, blue, alpha, s, t, u, s1, t1, u1 );
495 }
496 }
497 PB_CHECK_FLUSH(ctx,PB);
498 }
499 }
500}
501
502
503
504
505/*
506 * Antialiased points with or without texture mapping.
507 */
508static void antialiased_rgba_points( GLcontext *ctx,
509 GLuint first, GLuint last )
510{
511 struct vertex_buffer *VB = ctx->VB;
512 struct pixel_buffer *PB = ctx->PB;
513 GLuint i;
514 GLfloat radius, rmin, rmax, rmin2, rmax2, cscale;
515
516 radius = CLAMP( ctx->Point.Size, MIN_POINT_SIZE, MAX_POINT_SIZE ) * 0.5F;
517 rmin = radius - 0.7071F; /* 0.7071 = sqrt(2)/2 */
518 rmax = radius + 0.7071F;
519 rmin2 = rmin*rmin;
520 rmax2 = rmax*rmax;
521 cscale = 256.0F / (rmax2-rmin2);
522
523 if (ctx->Texture.ReallyEnabled) {
524 for (i=first;i<=last;i++) {
525 if (VB->ClipMask[i]==0) {
526 GLint xmin, ymin, xmax, ymax;
527 GLint x, y, z;
528 GLint red, green, blue, alpha;
529 GLfloat s, t, u;
530 GLfloat s1, t1, u1;
531
532 xmin = (GLint) (VB->Win.data[i][0] - radius);
533 xmax = (GLint) (VB->Win.data[i][0] + radius);
534 ymin = (GLint) (VB->Win.data[i][1] - radius);
535 ymax = (GLint) (VB->Win.data[i][1] + radius);
536 z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
537
538 red = VB->ColorPtr->data[i][0];
539 green = VB->ColorPtr->data[i][1];
540 blue = VB->ColorPtr->data[i][2];
541
542 switch (VB->TexCoordPtr[0]->size) {
543 case 4:
544 s = (VB->TexCoordPtr[0]->data[i][0]/
545 VB->TexCoordPtr[0]->data[i][3]);
546 t = (VB->TexCoordPtr[0]->data[i][1]/
547 VB->TexCoordPtr[0]->data[i][3]);
548 u = (VB->TexCoordPtr[0]->data[i][2]/
549 VB->TexCoordPtr[0]->data[i][3]);
550 break;
551 case 3:
552 s = VB->TexCoordPtr[0]->data[i][0];
553 t = VB->TexCoordPtr[0]->data[i][1];
554 u = VB->TexCoordPtr[0]->data[i][2];
555 break;
556 case 2:
557 s = VB->TexCoordPtr[0]->data[i][0];
558 t = VB->TexCoordPtr[0]->data[i][1];
559 u = 0.0;
560 break;
561 case 1:
562 s = VB->TexCoordPtr[0]->data[i][0];
563 t = 0.0;
564 u = 0.0;
565 break;
566 default:
567 /* should never get here */
568 s = t = u = 0.0;
569 gl_problem(ctx, "unexpected texcoord size in antialiased_rgba_points()");
570 }
571
572 if (ctx->Texture.ReallyEnabled >= TEXTURE1_1D) {
573 /* Multitextured! This is probably a slow enough path that
574 there's no reason to specialize the multitexture case. */
575 switch (VB->TexCoordPtr[1]->size) {
576 case 4:
577 s1 = ( VB->TexCoordPtr[1]->data[i][0] /
578 VB->TexCoordPtr[1]->data[i][3]);
579 t1 = ( VB->TexCoordPtr[1]->data[i][1] /
580 VB->TexCoordPtr[1]->data[i][3]);
581 u1 = ( VB->TexCoordPtr[1]->data[i][2] /
582 VB->TexCoordPtr[1]->data[i][3]);
583 break;
584 case 3:
585 s1 = VB->TexCoordPtr[1]->data[i][0];
586 t1 = VB->TexCoordPtr[1]->data[i][1];
587 u1 = VB->TexCoordPtr[1]->data[i][2];
588 break;
589 case 2:
590 s1 = VB->TexCoordPtr[1]->data[i][0];
591 t1 = VB->TexCoordPtr[1]->data[i][1];
592 u1 = 0.0;
593 break;
594 case 1:
595 s1 = VB->TexCoordPtr[1]->data[i][0];
596 t1 = 0.0;
597 u1 = 0.0;
598 break;
599 default:
600 /* should never get here */
601 s1 = t1 = u1 = 0.0;
602 gl_problem(ctx, "unexpected texcoord size in antialiased_rgba_points()");
603 }
604 }
605
606 for (y=ymin;y<=ymax;y++) {
607 for (x=xmin;x<=xmax;x++) {
608 GLfloat dx = x/*+0.5F*/ - VB->Win.data[i][0];
609 GLfloat dy = y/*+0.5F*/ - VB->Win.data[i][1];
610 GLfloat dist2 = dx*dx + dy*dy;
611 if (dist2<rmax2) {
612 alpha = VB->ColorPtr->data[i][3];
613 if (dist2>=rmin2) {
614 GLint coverage = (GLint) (256.0F-(dist2-rmin2)*cscale);
615 /* coverage is in [0,256] */
616 alpha = (alpha * coverage) >> 8;
617 }
618 if (ctx->Texture.ReallyEnabled >= TEXTURE1_1D) {
619 PB_WRITE_MULTITEX_PIXEL( PB, x,y,z, red, green, blue,
620 alpha, s, t, u, s1, t1, u1 );
621 } else {
622 PB_WRITE_TEX_PIXEL( PB, x,y,z, red, green, blue,
623 alpha, s, t, u );
624 }
625 }
626 }
627 }
628
629 PB_CHECK_FLUSH(ctx,PB);
630 }
631 }
632 }
633 else {
634 /* Not texture mapped */
635 for (i=first;i<=last;i++) {
636 if (VB->ClipMask[i]==0) {
637 GLint xmin, ymin, xmax, ymax;
638 GLint x, y, z;
639 GLint red, green, blue, alpha;
640
641 xmin = (GLint) (VB->Win.data[i][0] - radius);
642 xmax = (GLint) (VB->Win.data[i][0] + radius);
643 ymin = (GLint) (VB->Win.data[i][1] - radius);
644 ymax = (GLint) (VB->Win.data[i][1] + radius);
645 z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
646
647 red = VB->ColorPtr->data[i][0];
648 green = VB->ColorPtr->data[i][1];
649 blue = VB->ColorPtr->data[i][2];
650
651 for (y=ymin;y<=ymax;y++) {
652 for (x=xmin;x<=xmax;x++) {
653 GLfloat dx = x/*+0.5F*/ - VB->Win.data[i][0];
654 GLfloat dy = y/*+0.5F*/ - VB->Win.data[i][1];
655 GLfloat dist2 = dx*dx + dy*dy;
656 if (dist2<rmax2) {
657 alpha = VB->ColorPtr->data[i][3];
658 if (dist2>=rmin2) {
659 GLint coverage = (GLint) (256.0F-(dist2-rmin2)*cscale);
660 /* coverage is in [0,256] */
661 alpha = (alpha * coverage) >> 8;
662 }
663 PB_WRITE_RGBA_PIXEL( PB, x, y, z, red, green, blue,
664 alpha );
665 }
666 }
667 }
668 PB_CHECK_FLUSH(ctx,PB);
669 }
670 }
671 }
672}
673
674
675
676/*
677 * Null rasterizer for measuring transformation speed.
678 */
679static void null_points( GLcontext *ctx, GLuint first, GLuint last )
680{
681 (void) ctx;
682 (void) first;
683 (void) last;
684}
685
686
687
688/* Definition of the functions for GL_EXT_point_parameters */
689
690/* Calculates the distance attenuation formula of a vector of points in
691 * eye space coordinates
692 */
693static void dist3(GLfloat *out, GLuint first, GLuint last,
694 const GLcontext *ctx, const GLvector4f *v)
695{
696 GLuint stride = v->stride;
697 GLfloat *p = VEC_ELT(v, GLfloat, first);
698 GLuint i;
699
700 for (i = first ; i <= last ; i++, STRIDE_F(p, stride) )
701 {
702 GLfloat dist = GL_SQRT(p[0]*p[0]+p[1]*p[1]+p[2]*p[2]);
703 out[i] = 1/(ctx->Point.Params[0]+
704 dist * (ctx->Point.Params[1] +
705 dist * ctx->Point.Params[2]));
706 }
707}
708
709static void dist2(GLfloat *out, GLuint first, GLuint last,
710 const GLcontext *ctx, const GLvector4f *v)
711{
712 GLuint stride = v->stride;
713 GLfloat *p = VEC_ELT(v, GLfloat, first);
714 GLuint i;
715
716 for (i = first ; i <= last ; i++, STRIDE_F(p, stride) )
717 {
718 GLfloat dist = GL_SQRT(p[0]*p[0]+p[1]*p[1]);
719 out[i] = 1/(ctx->Point.Params[0]+
720 dist * (ctx->Point.Params[1] +
721 dist * ctx->Point.Params[2]));
722 }
723}
724
725
726typedef void (*dist_func)(GLfloat *out, GLuint first, GLuint last,
727 const GLcontext *ctx, const GLvector4f *v);
728
729
730static dist_func eye_dist_tab[5] = {
731 0,
732 0,
733 dist2,
734 dist3,
735 dist3
736};
737
738
739static void clip_dist(GLfloat *out, GLuint first, GLuint last,
740 const GLcontext *ctx, GLvector4f *clip)
741{
742 /* this is never called */
743 gl_problem(NULL, "clip_dist() called - dead code!\n");
744
745 (void) out;
746 (void) first;
747 (void) last;
748 (void) ctx;
749 (void) clip;
750
751#if 0
752 GLuint i;
753 const GLfloat *from = (GLfloat *)clip_vec->start;
754 const GLuint stride = clip_vec->stride;
755
756 for (i = first ; i <= last ; i++ )
757 {
758 GLfloat dist = win[i][2];
759 out[i] = 1/(ctx->Point.Params[0]+
760 dist * (ctx->Point.Params[1] +
761 dist * ctx->Point.Params[2]));
762 }
763#endif
764}
765
766
767
768/*
769 * Distance Attenuated General CI points.
770 */
771static void dist_atten_general_ci_points( GLcontext *ctx, GLuint first,
772 GLuint last )
773{
774 struct vertex_buffer *VB = ctx->VB;
775 struct pixel_buffer *PB = ctx->PB;
776 GLuint i;
777 GLfloat psize,dsize;
778 GLfloat dist[VB_SIZE];
779 psize=CLAMP(ctx->Point.Size,MIN_POINT_SIZE,MAX_POINT_SIZE);
780
781 if (ctx->NeedEyeCoords)
782 (eye_dist_tab[VB->EyePtr->size])( dist, first, last, ctx, VB->EyePtr );
783 else
784 clip_dist( dist, first, last, ctx, VB->ClipPtr );
785
786 for (i=first;i<=last;i++) {
787 if (VB->ClipMask[i]==0) {
788 GLint x, y, z;
789 GLint x0, x1, y0, y1;
790 GLint ix, iy;
791 GLint isize, radius;
792
793 x = (GLint) VB->Win.data[i][0];
794 y = (GLint) VB->Win.data[i][1];
795 z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
796
797 dsize=psize*dist[i];
798 if(dsize>=ctx->Point.Threshold) {
799 isize=(GLint) (MIN2(dsize,ctx->Point.MaxSize)+0.5F);
800 } else {
801 isize=(GLint) (MAX2(ctx->Point.Threshold,ctx->Point.MinSize)+0.5F);
802 }
803 radius = isize >> 1;
804
805 if (isize & 1) {
806 /* odd size */
807 x0 = x - radius;
808 x1 = x + radius;
809 y0 = y - radius;
810 y1 = y + radius;
811 }
812 else {
813 /* even size */
814 x0 = (GLint) (x + 1.5F) - radius;
815 x1 = x0 + isize - 1;
816 y0 = (GLint) (y + 1.5F) - radius;
817 y1 = y0 + isize - 1;
818 }
819
820 PB_SET_INDEX( ctx, PB, VB->IndexPtr->data[i] );
821
822 for (iy=y0;iy<=y1;iy++) {
823 for (ix=x0;ix<=x1;ix++) {
824 PB_WRITE_PIXEL( PB, ix, iy, z );
825 }
826 }
827 PB_CHECK_FLUSH(ctx,PB);
828 }
829 }
830}
831
832/*
833 * Distance Attenuated General RGBA points.
834 */
835static void dist_atten_general_rgba_points( GLcontext *ctx, GLuint first,
836 GLuint last )
837{
838 struct vertex_buffer *VB = ctx->VB;
839 struct pixel_buffer *PB = ctx->PB;
840 GLuint i;
841 GLubyte alpha;
842 GLfloat psize,dsize;
843 GLfloat dist[VB_SIZE];
844 psize=CLAMP(ctx->Point.Size,MIN_POINT_SIZE,MAX_POINT_SIZE);
845
846 if (ctx->NeedEyeCoords)
847 (eye_dist_tab[VB->EyePtr->size])( dist, first, last, ctx, VB->EyePtr );
848 else
849 clip_dist( dist, first, last, ctx, VB->ClipPtr );
850
851 for (i=first;i<=last;i++) {
852 if (VB->ClipMask[i]==0) {
853 GLint x, y, z;
854 GLint x0, x1, y0, y1;
855 GLint ix, iy;
856 GLint isize, radius;
857
858 x = (GLint) VB->Win.data[i][0];
859 y = (GLint) VB->Win.data[i][1];
860 z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
861 dsize=psize*dist[i];
862 if (dsize >= ctx->Point.Threshold) {
863 isize = (GLint) (MIN2(dsize,ctx->Point.MaxSize)+0.5F);
864 alpha = VB->ColorPtr->data[i][3];
865 }
866 else {
867 isize = (GLint) (MAX2(ctx->Point.Threshold,ctx->Point.MinSize)+0.5F);
868 dsize /= ctx->Point.Threshold;
869 alpha = (GLint) (VB->ColorPtr->data[i][3]* (dsize*dsize));
870 }
871 radius = isize >> 1;
872
873 if (isize & 1) {
874 /* odd size */
875 x0 = x - radius;
876 x1 = x + radius;
877 y0 = y - radius;
878 y1 = y + radius;
879 }
880 else {
881 /* even size */
882 x0 = (GLint) (x + 1.5F) - radius;
883 x1 = x0 + isize - 1;
884 y0 = (GLint) (y + 1.5F) - radius;
885 y1 = y0 + isize - 1;
886 }
887
888 PB_SET_COLOR( ctx, PB,
889 VB->ColorPtr->data[i][0],
890 VB->ColorPtr->data[i][1],
891 VB->ColorPtr->data[i][2],
892 alpha );
893
894 for (iy=y0;iy<=y1;iy++) {
895 for (ix=x0;ix<=x1;ix++) {
896 PB_WRITE_PIXEL( PB, ix, iy, z );
897 }
898 }
899 PB_CHECK_FLUSH(ctx,PB);
900 }
901 }
902}
903
904/*
905 * Distance Attenuated Textured RGBA points.
906 */
907static void dist_atten_textured_rgba_points( GLcontext *ctx, GLuint first,
908 GLuint last )
909{
910 struct vertex_buffer *VB = ctx->VB;
911 struct pixel_buffer *PB = ctx->PB;
912 GLuint i;
913 GLfloat psize,dsize;
914 GLfloat dist[VB_SIZE];
915 psize=CLAMP(ctx->Point.Size,MIN_POINT_SIZE,MAX_POINT_SIZE);
916
917 if (ctx->NeedEyeCoords)
918 (eye_dist_tab[VB->EyePtr->size])( dist, first, last, ctx, VB->EyePtr );
919 else
920 clip_dist( dist, first, last, ctx, VB->ClipPtr );
921
922 for (i=first;i<=last;i++) {
923 if (VB->ClipMask[i]==0) {
924 GLint x, y, z;
925 GLint x0, x1, y0, y1;
926 GLint ix, iy;
927 GLint isize, radius;
928 GLint red, green, blue, alpha;
929 GLfloat s, t, u;
930 GLfloat s1, t1, u1;
931
932 x = (GLint) VB->Win.data[i][0];
933 y = (GLint) VB->Win.data[i][1];
934 z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
935
936 dsize=psize*dist[i];
937 if(dsize>=ctx->Point.Threshold) {
938 isize=(GLint) (MIN2(dsize,ctx->Point.MaxSize)+0.5F);
939 alpha=VB->ColorPtr->data[i][3];
940 } else {
941 isize=(GLint) (MAX2(ctx->Point.Threshold,ctx->Point.MinSize)+0.5F);
942 dsize/=ctx->Point.Threshold;
943 alpha = (GLint) (VB->ColorPtr->data[i][3]* (dsize*dsize));
944 }
945
946 if (isize<1) {
947 isize = 1;
948 }
949 radius = isize >> 1;
950
951 if (isize & 1) {
952 /* odd size */
953 x0 = x - radius;
954 x1 = x + radius;
955 y0 = y - radius;
956 y1 = y + radius;
957 }
958 else {
959 /* even size */
960 x0 = (GLint) (x + 1.5F) - radius;
961 x1 = x0 + isize - 1;
962 y0 = (GLint) (y + 1.5F) - radius;
963 y1 = y0 + isize - 1;
964 }
965
966 red = VB->ColorPtr->data[i][0];
967 green = VB->ColorPtr->data[i][1];
968 blue = VB->ColorPtr->data[i][2];
969
970 switch (VB->TexCoordPtr[0]->size) {
971 case 4:
972 s = (VB->TexCoordPtr[0]->data[i][0]/
973 VB->TexCoordPtr[0]->data[i][3]);
974 t = (VB->TexCoordPtr[0]->data[i][1]/
975 VB->TexCoordPtr[0]->data[i][3]);
976 u = (VB->TexCoordPtr[0]->data[i][2]/
977 VB->TexCoordPtr[0]->data[i][3]);
978 break;
979 case 3:
980 s = VB->TexCoordPtr[0]->data[i][0];
981 t = VB->TexCoordPtr[0]->data[i][1];
982 u = VB->TexCoordPtr[0]->data[i][2];
983 break;
984 case 2:
985 s = VB->TexCoordPtr[0]->data[i][0];
986 t = VB->TexCoordPtr[0]->data[i][1];
987 u = 0.0;
988 break;
989 case 1:
990 s = VB->TexCoordPtr[0]->data[i][0];
991 t = 0.0;
992 u = 0.0;
993 break;
994 default:
995 /* should never get here */
996 s = t = u = 0.0;
997 gl_problem(ctx, "unexpected texcoord size in dist_atten_textured_rgba_points()");
998 }
999
1000 if (ctx->Texture.ReallyEnabled >= TEXTURE1_1D) {
1001 /* Multitextured! This is probably a slow enough path that
1002 there's no reason to specialize the multitexture case. */
1003 switch (VB->TexCoordPtr[1]->size) {
1004 case 4:
1005 s1 = ( VB->TexCoordPtr[1]->data[i][0] /
1006 VB->TexCoordPtr[1]->data[i][3] );
1007 t1 = ( VB->TexCoordPtr[1]->data[i][1] /
1008 VB->TexCoordPtr[1]->data[i][3] );
1009 u1 = ( VB->TexCoordPtr[1]->data[i][2] /
1010 VB->TexCoordPtr[1]->data[i][3] );
1011 break;
1012 case 3:
1013 s1 = VB->TexCoordPtr[1]->data[i][0];
1014 t1 = VB->TexCoordPtr[1]->data[i][1];
1015 u1 = VB->TexCoordPtr[1]->data[i][2];
1016 break;
1017 case 2:
1018 s1 = VB->TexCoordPtr[1]->data[i][0];
1019 t1 = VB->TexCoordPtr[1]->data[i][1];
1020 u1 = 0.0;
1021 break;
1022 case 1:
1023 s1 = VB->TexCoordPtr[1]->data[i][0];
1024 t1 = 0.0;
1025 u1 = 0.0;
1026 break;
1027 default:
1028 /* should never get here */
1029 s1 = t1 = u1 = 0.0;
1030 gl_problem(ctx, "unexpected texcoord size in dist_atten_textured_rgba_points()");
1031 }
1032 }
1033
1034/* don't think this is needed
1035 PB_SET_COLOR( red, green, blue, alpha );
1036*/
1037
1038 for (iy=y0;iy<=y1;iy++) {
1039 for (ix=x0;ix<=x1;ix++) {
1040 if (ctx->Texture.ReallyEnabled >= TEXTURE1_1D) {
1041 PB_WRITE_MULTITEX_PIXEL( PB, ix, iy, z, red, green, blue, alpha, s, t, u, s1, t1, u1 );
1042 } else {
1043 PB_WRITE_TEX_PIXEL( PB, ix, iy, z, red, green, blue, alpha, s, t, u );
1044 }
1045 }
1046 }
1047 PB_CHECK_FLUSH(ctx,PB);
1048 }
1049 }
1050}
1051
1052/*
1053 * Distance Attenuated Antialiased points with or without texture mapping.
1054 */
1055static void dist_atten_antialiased_rgba_points( GLcontext *ctx,
1056 GLuint first, GLuint last )
1057{
1058 struct vertex_buffer *VB = ctx->VB;
1059 struct pixel_buffer *PB = ctx->PB;
1060 GLuint i;
1061 GLfloat radius, rmin, rmax, rmin2, rmax2, cscale;
1062 GLfloat psize,dsize,alphaf;
1063 GLfloat dist[VB_SIZE];
1064 psize=CLAMP(ctx->Point.Size,MIN_POINT_SIZE,MAX_POINT_SIZE);
1065
1066 if (ctx->NeedEyeCoords)
1067 (eye_dist_tab[VB->EyePtr->size])( dist, first, last, ctx, VB->EyePtr );
1068 else
1069 clip_dist( dist, first, last, ctx, VB->ClipPtr );
1070
1071 if (ctx->Texture.ReallyEnabled) {
1072 for (i=first;i<=last;i++) {
1073 if (VB->ClipMask[i]==0) {
1074 GLint xmin, ymin, xmax, ymax;
1075 GLint x, y, z;
1076 GLint red, green, blue, alpha;
1077 GLfloat s, t, u;
1078 GLfloat s1, t1, u1;
1079
1080 dsize=psize*dist[i];
1081 if(dsize>=ctx->Point.Threshold) {
1082 radius=(MIN2(dsize,ctx->Point.MaxSize)*0.5F);
1083 alphaf=1.0;
1084 } else {
1085 radius=(MAX2(ctx->Point.Threshold,ctx->Point.MinSize)*0.5F);
1086 dsize/=ctx->Point.Threshold;
1087 alphaf=(dsize*dsize);
1088 }
1089 rmin = radius - 0.7071F; /* 0.7071 = sqrt(2)/2 */
1090 rmax = radius + 0.7071F;
1091 rmin2 = rmin*rmin;
1092 rmax2 = rmax*rmax;
1093 cscale = 256.0F / (rmax2-rmin2);
1094
1095 xmin = (GLint) (VB->Win.data[i][0] - radius);
1096 xmax = (GLint) (VB->Win.data[i][0] + radius);
1097 ymin = (GLint) (VB->Win.data[i][1] - radius);
1098 ymax = (GLint) (VB->Win.data[i][1] + radius);
1099 z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
1100
1101 red = VB->ColorPtr->data[i][0];
1102 green = VB->ColorPtr->data[i][1];
1103 blue = VB->ColorPtr->data[i][2];
1104
1105 switch (VB->TexCoordPtr[0]->size) {
1106 case 4:
1107 s = (VB->TexCoordPtr[0]->data[i][0]/
1108 VB->TexCoordPtr[0]->data[i][3]);
1109 t = (VB->TexCoordPtr[0]->data[i][1]/
1110 VB->TexCoordPtr[0]->data[i][3]);
1111 u = (VB->TexCoordPtr[0]->data[i][2]/
1112 VB->TexCoordPtr[0]->data[i][3]);
1113 break;
1114 case 3:
1115 s = VB->TexCoordPtr[0]->data[i][0];
1116 t = VB->TexCoordPtr[0]->data[i][1];
1117 u = VB->TexCoordPtr[0]->data[i][2];
1118 break;
1119 case 2:
1120 s = VB->TexCoordPtr[0]->data[i][0];
1121 t = VB->TexCoordPtr[0]->data[i][1];
1122 u = 0.0;
1123 break;
1124 case 1:
1125 s = VB->TexCoordPtr[0]->data[i][0];
1126 t = 0.0;
1127 u = 0.0;
1128 break;
1129 default:
1130 /* should never get here */
1131 s = t = u = 0.0;
1132 gl_problem(ctx, "unexpected texcoord size in dist_atten_antialiased_rgba_points()");
1133 }
1134
1135 if (ctx->Texture.ReallyEnabled >= TEXTURE1_1D) {
1136 /* Multitextured! This is probably a slow enough path that
1137 there's no reason to specialize the multitexture case. */
1138 switch (VB->TexCoordPtr[1]->size) {
1139 case 4:
1140 s1 = ( VB->TexCoordPtr[1]->data[i][0] /
1141 VB->TexCoordPtr[1]->data[i][3] );
1142 t1 = ( VB->TexCoordPtr[1]->data[i][1] /
1143 VB->TexCoordPtr[1]->data[i][3] );
1144 u1 = ( VB->TexCoordPtr[1]->data[i][2] /
1145 VB->TexCoordPtr[1]->data[i][3] );
1146 break;
1147 case 3:
1148 s1 = VB->TexCoordPtr[1]->data[i][0];
1149 t1 = VB->TexCoordPtr[1]->data[i][1];
1150 u1 = VB->TexCoordPtr[1]->data[i][2];
1151 break;
1152 case 2:
1153 s1 = VB->TexCoordPtr[1]->data[i][0];
1154 t1 = VB->TexCoordPtr[1]->data[i][1];
1155 u1 = 0.0;
1156 break;
1157 case 1:
1158 s1 = VB->TexCoordPtr[1]->data[i][0];
1159 t1 = 0.0;
1160 u1 = 0.0;
1161 break;
1162 default:
1163 /* should never get here */
1164 s = t = u = 0.0;
1165 gl_problem(ctx, "unexpected texcoord size in dist_atten_antialiased_rgba_points()");
1166 }
1167 }
1168
1169 for (y=ymin;y<=ymax;y++) {
1170 for (x=xmin;x<=xmax;x++) {
1171 GLfloat dx = x/*+0.5F*/ - VB->Win.data[i][0];
1172 GLfloat dy = y/*+0.5F*/ - VB->Win.data[i][1];
1173 GLfloat dist2 = dx*dx + dy*dy;
1174 if (dist2<rmax2) {
1175 alpha = VB->ColorPtr->data[i][3];
1176 if (dist2>=rmin2) {
1177 GLint coverage = (GLint) (256.0F-(dist2-rmin2)*cscale);
1178 /* coverage is in [0,256] */
1179 alpha = (alpha * coverage) >> 8;
1180 }
1181 alpha = (GLint) (alpha * alphaf);
1182 if (ctx->Texture.ReallyEnabled >= TEXTURE1_1D) {
1183 PB_WRITE_MULTITEX_PIXEL( PB, x,y,z, red, green, blue, alpha, s, t, u, s1, t1, u1 );
1184 } else {
1185 PB_WRITE_TEX_PIXEL( PB, x,y,z, red, green, blue, alpha, s, t, u );
1186 }
1187 }
1188 }
1189 }
1190 PB_CHECK_FLUSH(ctx,PB);
1191 }
1192 }
1193 }
1194 else {
1195 /* Not texture mapped */
1196 for (i=first;i<=last;i++) {
1197 if (VB->ClipMask[i]==0) {
1198 GLint xmin, ymin, xmax, ymax;
1199 GLint x, y, z;
1200 GLint red, green, blue, alpha;
1201
1202 dsize=psize*dist[i];
1203 if(dsize>=ctx->Point.Threshold) {
1204 radius=(MIN2(dsize,ctx->Point.MaxSize)*0.5F);
1205 alphaf=1.0;
1206 } else {
1207 radius=(MAX2(ctx->Point.Threshold,ctx->Point.MinSize)*0.5F);
1208 dsize/=ctx->Point.Threshold;
1209 alphaf=(dsize*dsize);
1210 }
1211 rmin = radius - 0.7071F; /* 0.7071 = sqrt(2)/2 */
1212 rmax = radius + 0.7071F;
1213 rmin2 = rmin*rmin;
1214 rmax2 = rmax*rmax;
1215 cscale = 256.0F / (rmax2-rmin2);
1216
1217 xmin = (GLint) (VB->Win.data[i][0] - radius);
1218 xmax = (GLint) (VB->Win.data[i][0] + radius);
1219 ymin = (GLint) (VB->Win.data[i][1] - radius);
1220 ymax = (GLint) (VB->Win.data[i][1] + radius);
1221 z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
1222
1223 red = VB->ColorPtr->data[i][0];
1224 green = VB->ColorPtr->data[i][1];
1225 blue = VB->ColorPtr->data[i][2];
1226
1227 for (y=ymin;y<=ymax;y++) {
1228 for (x=xmin;x<=xmax;x++) {
1229 GLfloat dx = x/*+0.5F*/ - VB->Win.data[i][0];
1230 GLfloat dy = y/*+0.5F*/ - VB->Win.data[i][1];
1231 GLfloat dist2 = dx*dx + dy*dy;
1232 if (dist2<rmax2) {
1233 alpha = VB->ColorPtr->data[i][3];
1234 if (dist2>=rmin2) {
1235 GLint coverage = (GLint) (256.0F-(dist2-rmin2)*cscale);
1236 /* coverage is in [0,256] */
1237 alpha = (alpha * coverage) >> 8;
1238 }
1239 alpha = (GLint) (alpha * alphaf);
1240 PB_WRITE_RGBA_PIXEL( PB, x, y, z, red, green, blue, alpha )
1241 ;
1242 }
1243 }
1244 }
1245 PB_CHECK_FLUSH(ctx,PB);
1246 }
1247 }
1248 }
1249}
1250
1251
1252/*
1253 * Examine the current context to determine which point drawing function
1254 * should be used.
1255 */
1256void gl_set_point_function( GLcontext *ctx )
1257{
1258 GLboolean rgbmode = ctx->Visual->RGBAflag;
1259
1260 if (ctx->RenderMode==GL_RENDER) {
1261 if (ctx->NoRaster) {
1262 ctx->Driver.PointsFunc = null_points;
1263 return;
1264 }
1265 if (ctx->Driver.PointsFunc) {
1266 /* Device driver will draw points. */
1267 ctx->IndirectTriangles &= ~DD_POINT_SW_RASTERIZE;
1268 return;
1269 }
1270
1271 if (!ctx->Point.Attenuated) {
1272 if (ctx->Point.SmoothFlag && rgbmode) {
1273 ctx->Driver.PointsFunc = antialiased_rgba_points;
1274 }
1275 else if (ctx->Texture.ReallyEnabled) {
1276 if (ctx->Texture.ReallyEnabled >= TEXTURE1_1D) {
1277 ctx->Driver.PointsFunc = multitextured_rgba_points;
1278 }
1279 else {
1280 ctx->Driver.PointsFunc = textured_rgba_points;
1281 }
1282 }
1283 else if (ctx->Point.Size==1.0) {
1284 /* size=1, any raster ops */
1285 if (rgbmode)
1286 ctx->Driver.PointsFunc = size1_rgba_points;
1287 else
1288 ctx->Driver.PointsFunc = size1_ci_points;
1289 }
1290 else {
1291 /* every other kind of point rendering */
1292 if (rgbmode)
1293 ctx->Driver.PointsFunc = general_rgba_points;
1294 else
1295 ctx->Driver.PointsFunc = general_ci_points;
1296 }
1297 }
1298 else if(ctx->Point.SmoothFlag && rgbmode) {
1299 ctx->Driver.PointsFunc = dist_atten_antialiased_rgba_points;
1300 }
1301 else if (ctx->Texture.ReallyEnabled) {
1302 ctx->Driver.PointsFunc = dist_atten_textured_rgba_points;
1303 }
1304 else {
1305 /* every other kind of point rendering */
1306 if (rgbmode)
1307 ctx->Driver.PointsFunc = dist_atten_general_rgba_points;
1308 else
1309 ctx->Driver.PointsFunc = dist_atten_general_ci_points;
1310 }
1311 }
1312 else if (ctx->RenderMode==GL_FEEDBACK) {
1313 ctx->Driver.PointsFunc = gl_feedback_points;
1314 }
1315 else {
1316 /* GL_SELECT mode */
1317 ctx->Driver.PointsFunc = gl_select_points;
1318 }
1319
1320}
1321
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