source: trunk/src/opengl/mesa/points.c@ 3721

Last change on this file since 3721 was 3598, checked in by jeroen, 25 years ago

* empty log message *
File size: 41.2 KB
Line 
1/* $Id: points.c,v 1.3 2000-05-23 20:40:50 jeroen Exp $ */
2
3/*
4 * Mesa 3-D graphics library
5 * Version: 3.3
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#include "glheader.h"
34#include "types.h"
35#include "context.h"
36#include "feedback.h"
37#include "macros.h"
38#include "mmath.h"
39#include "pb.h"
40#include "points.h"
41#include "span.h"
42#include "texstate.h"
43#include "vb.h"
44#include "mmath.h"
45#endif
46
47
48
49void
50_mesa_PointSize( GLfloat size )
51{
52 GET_CURRENT_CONTEXT(ctx);
53 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPointSize");
54
55 if (size <= 0.0) {
56 gl_error( ctx, GL_INVALID_VALUE, "glPointSize" );
57 return;
58 }
59
60 if (ctx->Point.Size != size) {
61 ctx->Point.Size = size;
62 ctx->TriangleCaps &= ~DD_POINT_SIZE;
63 if (size != 1.0) ctx->TriangleCaps |= DD_POINT_SIZE;
64 ctx->NewState |= NEW_RASTER_OPS;
65 }
66}
67
68
69
70void
71_mesa_PointParameterfEXT( GLenum pname, GLfloat param)
72{
73 _mesa_PointParameterfvEXT(pname, &param);
74}
75
76
77void
78_mesa_PointParameterfvEXT( GLenum pname, const GLfloat *params)
79{
80 GET_CURRENT_CONTEXT(ctx);
81 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPointParameterfvEXT");
82
83 switch (pname) {
84 case GL_DISTANCE_ATTENUATION_EXT:
85 {
86 const GLboolean tmp = ctx->Point.Attenuated;
87 COPY_3V(ctx->Point.Params, params);
88 ctx->Point.Attenuated = (params[0] != 1.0 ||
89 params[1] != 0.0 ||
90 params[2] != 0.0);
91
92 if (tmp != ctx->Point.Attenuated) {
93 ctx->Enabled ^= ENABLE_POINT_ATTEN;
94 ctx->TriangleCaps ^= DD_POINT_ATTEN;
95 ctx->NewState |= NEW_RASTER_OPS;
96 }
97 }
98 break;
99 case GL_POINT_SIZE_MIN_EXT:
100 if (*params < 0.0F) {
101 gl_error( ctx, GL_INVALID_VALUE, "glPointParameterfvEXT" );
102 return;
103 }
104 ctx->Point.MinSize = *params;
105 break;
106 case GL_POINT_SIZE_MAX_EXT:
107 if (*params < 0.0F) {
108 gl_error( ctx, GL_INVALID_VALUE, "glPointParameterfvEXT" );
109 return;
110 }
111 ctx->Point.MaxSize = *params;
112 break;
113 case GL_POINT_FADE_THRESHOLD_SIZE_EXT:
114 if (*params < 0.0F) {
115 gl_error( ctx, GL_INVALID_VALUE, "glPointParameterfvEXT" );
116 return;
117 }
118 ctx->Point.Threshold = *params;
119 break;
120 default:
121 gl_error( ctx, GL_INVALID_ENUM, "glPointParameterfvEXT" );
122 return;
123 }
124
125 ctx->NewState |= NEW_RASTER_OPS;
126}
127
128
129/**********************************************************************/
130/***** Rasterization *****/
131/**********************************************************************/
132
133
134/*
135 * There are 3 pairs (RGBA, CI) of point rendering functions:
136 * 1. simple: size=1 and no special rasterization functions (fastest)
137 * 2. size1: size=1 and any rasterization functions
138 * 3. general: any size and rasterization functions (slowest)
139 *
140 * All point rendering functions take the same two arguments: first and
141 * last which specify that the points specified by VB[first] through
142 * VB[last] are to be rendered.
143 */
144
145
146
147
148
149/*
150 * CI points with size == 1.0
151 */
152static void size1_ci_points( GLcontext *ctx, GLuint first, GLuint last )
153{
154 struct vertex_buffer *VB = ctx->VB;
155 struct pixel_buffer *PB = ctx->PB;
156 GLfloat *win;
157 GLint *pbx = PB->x, *pby = PB->y;
158 GLdepth *pbz = PB->z;
159 GLuint *pbi = PB->i;
160 GLuint pbcount = PB->count;
161 GLuint i;
162
163 win = &VB->Win.data[first][0];
164 for (i=first;i<=last;i++) {
165 if (VB->ClipMask[i]==0) {
166 pbx[pbcount] = (GLint) win[0];
167 pby[pbcount] = (GLint) win[1];
168 pbz[pbcount] = (GLint) (win[2] + ctx->PointZoffset);
169 pbi[pbcount] = VB->IndexPtr->data[i];
170 pbcount++;
171 }
172 win += 3;
173 }
174 PB->count = pbcount;
175 PB_CHECK_FLUSH(ctx, PB);
176}
177
178
179
180/*
181 * RGBA points with size == 1.0
182 */
183static void size1_rgba_points( GLcontext *ctx, GLuint first, GLuint last )
184{
185 struct vertex_buffer *VB = ctx->VB;
186 struct pixel_buffer *PB = ctx->PB;
187 GLuint i;
188
189 for (i=first;i<=last;i++) {
190 if (VB->ClipMask[i]==0) {
191 GLint x, y, z;
192 GLint red, green, blue, alpha;
193
194 x = (GLint) VB->Win.data[i][0];
195 y = (GLint) VB->Win.data[i][1];
196 z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
197
198 red = VB->ColorPtr->data[i][0];
199 green = VB->ColorPtr->data[i][1];
200 blue = VB->ColorPtr->data[i][2];
201 alpha = VB->ColorPtr->data[i][3];
202
203 PB_WRITE_RGBA_PIXEL( PB, x, y, z, red, green, blue, alpha );
204 }
205 }
206 PB_CHECK_FLUSH(ctx,PB);
207}
208
209
210
211/*
212 * General CI points.
213 */
214static void general_ci_points( GLcontext *ctx, GLuint first, GLuint last )
215{
216 struct vertex_buffer *VB = ctx->VB;
217 struct pixel_buffer *PB = ctx->PB;
218 GLuint i;
219 GLint isize = (GLint) (CLAMP(ctx->Point.Size,MIN_POINT_SIZE,MAX_POINT_SIZE) + 0.5F);
220 GLint radius = isize >> 1;
221
222 for (i=first;i<=last;i++) {
223 if (VB->ClipMask[i]==0) {
224 GLint x, y, z;
225 GLint x0, x1, y0, y1;
226 GLint ix, iy;
227
228 x = (GLint) VB->Win.data[i][0];
229 y = (GLint) VB->Win.data[i][1];
230 z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
231
232 if (isize & 1) {
233 /* odd size */
234 x0 = x - radius;
235 x1 = x + radius;
236 y0 = y - radius;
237 y1 = y + radius;
238 }
239 else {
240 /* even size */
241 x0 = (GLint) (x + 1.5F) - radius;
242 x1 = x0 + isize - 1;
243 y0 = (GLint) (y + 1.5F) - radius;
244 y1 = y0 + isize - 1;
245 }
246
247 PB_SET_INDEX( ctx, PB, VB->IndexPtr->data[i] );
248
249 for (iy=y0;iy<=y1;iy++) {
250 for (ix=x0;ix<=x1;ix++) {
251 PB_WRITE_PIXEL( PB, ix, iy, z );
252 }
253 }
254 PB_CHECK_FLUSH(ctx,PB);
255 }
256 }
257}
258
259
260/*
261 * General RGBA points.
262 */
263static void general_rgba_points( GLcontext *ctx, GLuint first, GLuint last )
264{
265 struct vertex_buffer *VB = ctx->VB;
266 struct pixel_buffer *PB = ctx->PB;
267 GLuint i;
268 GLint isize = (GLint) (CLAMP(ctx->Point.Size,MIN_POINT_SIZE,MAX_POINT_SIZE) + 0.5F);
269 GLint radius = isize >> 1;
270
271 for (i=first;i<=last;i++) {
272 if (VB->ClipMask[i]==0) {
273 GLint x, y, z;
274 GLint x0, x1, y0, y1;
275 GLint ix, iy;
276
277 x = (GLint) VB->Win.data[i][0];
278 y = (GLint) VB->Win.data[i][1];
279 z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
280
281 if (isize & 1) {
282 /* odd size */
283 x0 = x - radius;
284 x1 = x + radius;
285 y0 = y - radius;
286 y1 = y + radius;
287 }
288 else {
289 /* even size */
290 x0 = (GLint) (x + 1.5F) - radius;
291 x1 = x0 + isize - 1;
292 y0 = (GLint) (y + 1.5F) - radius;
293 y1 = y0 + isize - 1;
294 }
295
296 PB_SET_COLOR( ctx, PB,
297 VB->ColorPtr->data[i][0],
298 VB->ColorPtr->data[i][1],
299 VB->ColorPtr->data[i][2],
300 VB->ColorPtr->data[i][3] );
301
302 for (iy=y0;iy<=y1;iy++) {
303 for (ix=x0;ix<=x1;ix++) {
304 PB_WRITE_PIXEL( PB, ix, iy, z );
305 }
306 }
307 PB_CHECK_FLUSH(ctx,PB);
308 }
309 }
310}
311
312
313
314
315/*
316 * Textured RGBA points.
317 */
318static void textured_rgba_points( GLcontext *ctx, GLuint first, GLuint last )
319{
320 struct vertex_buffer *VB = ctx->VB;
321 struct pixel_buffer *PB = ctx->PB;
322 GLuint i;
323
324 for (i=first;i<=last;i++) {
325 if (VB->ClipMask[i]==0) {
326 GLint x, y, z;
327 GLint x0, x1, y0, y1;
328 GLint ix, iy;
329 GLint isize, radius;
330 GLint red, green, blue, alpha;
331 GLfloat s, t, u;
332
333 x = (GLint) VB->Win.data[i][0];
334 y = (GLint) VB->Win.data[i][1];
335 z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
336
337 isize = (GLint)
338 (CLAMP(ctx->Point.Size,MIN_POINT_SIZE,MAX_POINT_SIZE) + 0.5F);
339 if (isize<1) {
340 isize = 1;
341 }
342 radius = isize >> 1;
343
344 if (isize & 1) {
345 /* odd size */
346 x0 = x - radius;
347 x1 = x + radius;
348 y0 = y - radius;
349 y1 = y + radius;
350 }
351 else {
352 /* even size */
353 x0 = (GLint) (x + 1.5F) - radius;
354 x1 = x0 + isize - 1;
355 y0 = (GLint) (y + 1.5F) - radius;
356 y1 = y0 + isize - 1;
357 }
358
359 red = VB->ColorPtr->data[i][0];
360 green = VB->ColorPtr->data[i][1];
361 blue = VB->ColorPtr->data[i][2];
362 alpha = VB->ColorPtr->data[i][3];
363
364 switch (VB->TexCoordPtr[0]->size) {
365 case 4:
366 s = VB->TexCoordPtr[0]->data[i][0]/VB->TexCoordPtr[0]->data[i][3];
367 t = VB->TexCoordPtr[0]->data[i][1]/VB->TexCoordPtr[0]->data[i][3];
368 u = VB->TexCoordPtr[0]->data[i][2]/VB->TexCoordPtr[0]->data[i][3];
369 break;
370 case 3:
371 s = VB->TexCoordPtr[0]->data[i][0];
372 t = VB->TexCoordPtr[0]->data[i][1];
373 u = VB->TexCoordPtr[0]->data[i][2];
374 break;
375 case 2:
376 s = VB->TexCoordPtr[0]->data[i][0];
377 t = VB->TexCoordPtr[0]->data[i][1];
378 u = 0.0;
379 break;
380 case 1:
381 s = VB->TexCoordPtr[0]->data[i][0];
382 t = 0.0;
383 u = 0.0;
384 break;
385 default:
386 /* should never get here */
387 s = t = u = 0.0;
388 gl_problem(ctx, "unexpected texcoord size in textured_rgba_points()");
389 }
390
391/* don't think this is needed
392 PB_SET_COLOR( red, green, blue, alpha );
393*/
394
395 for (iy=y0;iy<=y1;iy++) {
396 for (ix=x0;ix<=x1;ix++) {
397 PB_WRITE_TEX_PIXEL( PB, ix, iy, z, red, green, blue, alpha, s, t, u );
398 }
399 }
400 PB_CHECK_FLUSH(ctx,PB);
401 }
402 }
403}
404
405
406/*
407 * Multitextured RGBA points.
408 */
409static void multitextured_rgba_points( GLcontext *ctx, GLuint first, GLuint last )
410{
411 struct vertex_buffer *VB = ctx->VB;
412 struct pixel_buffer *PB = ctx->PB;
413 GLuint i;
414
415 for (i=first;i<=last;i++) {
416 if (VB->ClipMask[i]==0) {
417 GLint x, y, z;
418 GLint x0, x1, y0, y1;
419 GLint ix, iy;
420 GLint isize, radius;
421 GLint red, green, blue, alpha;
422 GLfloat s, t, u;
423 GLfloat s1, t1, u1;
424
425 x = (GLint) VB->Win.data[i][0];
426 y = (GLint) VB->Win.data[i][1];
427 z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
428
429 isize = (GLint)
430 (CLAMP(ctx->Point.Size,MIN_POINT_SIZE,MAX_POINT_SIZE) + 0.5F);
431 if (isize<1) {
432 isize = 1;
433 }
434 radius = isize >> 1;
435
436 if (isize & 1) {
437 /* odd size */
438 x0 = x - radius;
439 x1 = x + radius;
440 y0 = y - radius;
441 y1 = y + radius;
442 }
443 else {
444 /* even size */
445 x0 = (GLint) (x + 1.5F) - radius;
446 x1 = x0 + isize - 1;
447 y0 = (GLint) (y + 1.5F) - radius;
448 y1 = y0 + isize - 1;
449 }
450
451 red = VB->ColorPtr->data[i][0];
452 green = VB->ColorPtr->data[i][1];
453 blue = VB->ColorPtr->data[i][2];
454 alpha = VB->ColorPtr->data[i][3];
455
456 switch (VB->TexCoordPtr[0]->size) {
457 case 4:
458 s = VB->TexCoordPtr[0]->data[i][0]/VB->TexCoordPtr[0]->data[i][3];
459 t = VB->TexCoordPtr[0]->data[i][1]/VB->TexCoordPtr[0]->data[i][3];
460 u = VB->TexCoordPtr[0]->data[i][2]/VB->TexCoordPtr[0]->data[i][3];
461 break;
462 case 3:
463 s = VB->TexCoordPtr[0]->data[i][0];
464 t = VB->TexCoordPtr[0]->data[i][1];
465 u = VB->TexCoordPtr[0]->data[i][2];
466 break;
467 case 2:
468 s = VB->TexCoordPtr[0]->data[i][0];
469 t = VB->TexCoordPtr[0]->data[i][1];
470 u = 0.0;
471 break;
472 case 1:
473 s = VB->TexCoordPtr[0]->data[i][0];
474 t = 0.0;
475 u = 0.0;
476 break;
477 default:
478 /* should never get here */
479 s = t = u = 0.0;
480 gl_problem(ctx, "unexpected texcoord size in multitextured_rgba_points()");
481 }
482
483 switch (VB->TexCoordPtr[1]->size) {
484 case 4:
485 s1 = VB->TexCoordPtr[1]->data[i][0]/VB->TexCoordPtr[1]->data[i][3];
486 t1 = VB->TexCoordPtr[1]->data[i][1]/VB->TexCoordPtr[1]->data[i][3];
487 u1 = VB->TexCoordPtr[1]->data[i][2]/VB->TexCoordPtr[1]->data[i][3];
488 break;
489 case 3:
490 s1 = VB->TexCoordPtr[1]->data[i][0];
491 t1 = VB->TexCoordPtr[1]->data[i][1];
492 u1 = VB->TexCoordPtr[1]->data[i][2];
493 break;
494 case 2:
495 s1 = VB->TexCoordPtr[1]->data[i][0];
496 t1 = VB->TexCoordPtr[1]->data[i][1];
497 u1 = 0.0;
498 break;
499 case 1:
500 s1 = VB->TexCoordPtr[1]->data[i][0];
501 t1 = 0.0;
502 u1 = 0.0;
503 break;
504 default:
505 /* should never get here */
506 s1 = t1 = u1 = 0.0;
507 gl_problem(ctx, "unexpected texcoord size in multitextured_rgba_points()");
508 }
509
510 for (iy=y0;iy<=y1;iy++) {
511 for (ix=x0;ix<=x1;ix++) {
512 PB_WRITE_MULTITEX_PIXEL( PB, ix, iy, z, red, green, blue, alpha, s, t, u, s1, t1, u1 );
513 }
514 }
515 PB_CHECK_FLUSH(ctx,PB);
516 }
517 }
518}
519
520
521
522
523/*
524 * Antialiased points with or without texture mapping.
525 */
526static void antialiased_rgba_points( GLcontext *ctx,
527 GLuint first, GLuint last )
528{
529 struct vertex_buffer *VB = ctx->VB;
530 struct pixel_buffer *PB = ctx->PB;
531 GLuint i;
532 GLfloat radius, rmin, rmax, rmin2, rmax2, cscale;
533
534 radius = CLAMP( ctx->Point.Size, MIN_POINT_SIZE, MAX_POINT_SIZE ) * 0.5F;
535 rmin = radius - 0.7071F; /* 0.7071 = sqrt(2)/2 */
536 rmax = radius + 0.7071F;
537 rmin2 = rmin*rmin;
538 rmax2 = rmax*rmax;
539 cscale = 256.0F / (rmax2-rmin2);
540
541 if (ctx->Texture.ReallyEnabled) {
542 for (i=first;i<=last;i++) {
543 if (VB->ClipMask[i]==0) {
544 GLint xmin, ymin, xmax, ymax;
545 GLint x, y, z;
546 GLint red, green, blue, alpha;
547 GLfloat s, t, u;
548 GLfloat s1, t1, u1;
549
550 xmin = (GLint) (VB->Win.data[i][0] - radius);
551 xmax = (GLint) (VB->Win.data[i][0] + radius);
552 ymin = (GLint) (VB->Win.data[i][1] - radius);
553 ymax = (GLint) (VB->Win.data[i][1] + radius);
554 z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
555
556 red = VB->ColorPtr->data[i][0];
557 green = VB->ColorPtr->data[i][1];
558 blue = VB->ColorPtr->data[i][2];
559
560 switch (VB->TexCoordPtr[0]->size) {
561 case 4:
562 s = (VB->TexCoordPtr[0]->data[i][0]/
563 VB->TexCoordPtr[0]->data[i][3]);
564 t = (VB->TexCoordPtr[0]->data[i][1]/
565 VB->TexCoordPtr[0]->data[i][3]);
566 u = (VB->TexCoordPtr[0]->data[i][2]/
567 VB->TexCoordPtr[0]->data[i][3]);
568 break;
569 case 3:
570 s = VB->TexCoordPtr[0]->data[i][0];
571 t = VB->TexCoordPtr[0]->data[i][1];
572 u = VB->TexCoordPtr[0]->data[i][2];
573 break;
574 case 2:
575 s = VB->TexCoordPtr[0]->data[i][0];
576 t = VB->TexCoordPtr[0]->data[i][1];
577 u = 0.0;
578 break;
579 case 1:
580 s = VB->TexCoordPtr[0]->data[i][0];
581 t = 0.0;
582 u = 0.0;
583 break;
584 default:
585 /* should never get here */
586 s = t = u = 0.0;
587 gl_problem(ctx, "unexpected texcoord size in antialiased_rgba_points()");
588 }
589
590 if (ctx->Texture.ReallyEnabled >= TEXTURE1_1D) {
591 /* Multitextured! This is probably a slow enough path that
592 there's no reason to specialize the multitexture case. */
593 switch (VB->TexCoordPtr[1]->size) {
594 case 4:
595 s1 = ( VB->TexCoordPtr[1]->data[i][0] /
596 VB->TexCoordPtr[1]->data[i][3]);
597 t1 = ( VB->TexCoordPtr[1]->data[i][1] /
598 VB->TexCoordPtr[1]->data[i][3]);
599 u1 = ( VB->TexCoordPtr[1]->data[i][2] /
600 VB->TexCoordPtr[1]->data[i][3]);
601 break;
602 case 3:
603 s1 = VB->TexCoordPtr[1]->data[i][0];
604 t1 = VB->TexCoordPtr[1]->data[i][1];
605 u1 = VB->TexCoordPtr[1]->data[i][2];
606 break;
607 case 2:
608 s1 = VB->TexCoordPtr[1]->data[i][0];
609 t1 = VB->TexCoordPtr[1]->data[i][1];
610 u1 = 0.0;
611 break;
612 case 1:
613 s1 = VB->TexCoordPtr[1]->data[i][0];
614 t1 = 0.0;
615 u1 = 0.0;
616 break;
617 default:
618 /* should never get here */
619 s1 = t1 = u1 = 0.0;
620 gl_problem(ctx, "unexpected texcoord size in antialiased_rgba_points()");
621 }
622 }
623
624 for (y=ymin;y<=ymax;y++) {
625 for (x=xmin;x<=xmax;x++) {
626 GLfloat dx = x/*+0.5F*/ - VB->Win.data[i][0];
627 GLfloat dy = y/*+0.5F*/ - VB->Win.data[i][1];
628 GLfloat dist2 = dx*dx + dy*dy;
629 if (dist2<rmax2) {
630 alpha = VB->ColorPtr->data[i][3];
631 if (dist2>=rmin2) {
632 GLint coverage = (GLint) (256.0F-(dist2-rmin2)*cscale);
633 /* coverage is in [0,256] */
634 alpha = (alpha * coverage) >> 8;
635 }
636 if (ctx->Texture.ReallyEnabled >= TEXTURE1_1D) {
637 PB_WRITE_MULTITEX_PIXEL( PB, x,y,z, red, green, blue,
638 alpha, s, t, u, s1, t1, u1 );
639 } else {
640 PB_WRITE_TEX_PIXEL( PB, x,y,z, red, green, blue,
641 alpha, s, t, u );
642 }
643 }
644 }
645 }
646
647 PB_CHECK_FLUSH(ctx,PB);
648 }
649 }
650 }
651 else {
652 /* Not texture mapped */
653 for (i=first;i<=last;i++) {
654 if (VB->ClipMask[i]==0) {
655 GLint xmin, ymin, xmax, ymax;
656 GLint x, y, z;
657 GLint red, green, blue, alpha;
658
659 xmin = (GLint) (VB->Win.data[i][0] - radius);
660 xmax = (GLint) (VB->Win.data[i][0] + radius);
661 ymin = (GLint) (VB->Win.data[i][1] - radius);
662 ymax = (GLint) (VB->Win.data[i][1] + radius);
663 z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
664
665 red = VB->ColorPtr->data[i][0];
666 green = VB->ColorPtr->data[i][1];
667 blue = VB->ColorPtr->data[i][2];
668
669 for (y=ymin;y<=ymax;y++) {
670 for (x=xmin;x<=xmax;x++) {
671 GLfloat dx = x/*+0.5F*/ - VB->Win.data[i][0];
672 GLfloat dy = y/*+0.5F*/ - VB->Win.data[i][1];
673 GLfloat dist2 = dx*dx + dy*dy;
674 if (dist2<rmax2) {
675 alpha = VB->ColorPtr->data[i][3];
676 if (dist2>=rmin2) {
677 GLint coverage = (GLint) (256.0F-(dist2-rmin2)*cscale);
678 /* coverage is in [0,256] */
679 alpha = (alpha * coverage) >> 8;
680 }
681 PB_WRITE_RGBA_PIXEL( PB, x, y, z, red, green, blue,
682 alpha );
683 }
684 }
685 }
686 PB_CHECK_FLUSH(ctx,PB);
687 }
688 }
689 }
690}
691
692
693
694/*
695 * Null rasterizer for measuring transformation speed.
696 */
697static void null_points( GLcontext *ctx, GLuint first, GLuint last )
698{
699 (void) ctx;
700 (void) first;
701 (void) last;
702}
703
704
705
706/* Definition of the functions for GL_EXT_point_parameters */
707
708/* Calculates the distance attenuation formula of a vector of points in
709 * eye space coordinates
710 */
711static void dist3(GLfloat *out, GLuint first, GLuint last,
712 const GLcontext *ctx, const GLvector4f *v)
713{
714 GLuint stride = v->stride;
715 const GLfloat *p = VEC_ELT(v, GLfloat, first);
716 GLuint i;
717
718 for (i = first ; i <= last ; i++, STRIDE_F(p, stride) ) {
719 GLfloat dist = GL_SQRT(p[0]*p[0]+p[1]*p[1]+p[2]*p[2]);
720 out[i] = 1.0F / (ctx->Point.Params[0] +
721 dist * (ctx->Point.Params[1] +
722 dist * ctx->Point.Params[2]));
723 }
724}
725
726static void dist2(GLfloat *out, GLuint first, GLuint last,
727 const GLcontext *ctx, const GLvector4f *v)
728{
729 GLuint stride = v->stride;
730 const GLfloat *p = VEC_ELT(v, GLfloat, first);
731 GLuint i;
732
733 for (i = first ; i <= last ; i++, STRIDE_F(p, stride) ) {
734 GLfloat dist = GL_SQRT(p[0]*p[0]+p[1]*p[1]);
735 out[i] = 1.0F / (ctx->Point.Params[0] +
736 dist * (ctx->Point.Params[1] +
737 dist * ctx->Point.Params[2]));
738 }
739}
740
741
742typedef void (*dist_func)(GLfloat *out, GLuint first, GLuint last,
743 const GLcontext *ctx, const GLvector4f *v);
744
745
746static dist_func eye_dist_tab[5] = {
747 0,
748 0,
749 dist2,
750 dist3,
751 dist3
752};
753
754
755static void clip_dist(GLfloat *out, GLuint first, GLuint last,
756 const GLcontext *ctx, GLvector4f *clip)
757{
758 /* this is never called */
759 gl_problem(NULL, "clip_dist() called - dead code!\n");
760
761 (void) out;
762 (void) first;
763 (void) last;
764 (void) ctx;
765 (void) clip;
766
767#if 0
768 GLuint i;
769 const GLfloat *from = (GLfloat *)clip_vec->start;
770 const GLuint stride = clip_vec->stride;
771
772 for (i = first ; i <= last ; i++ )
773 {
774 GLfloat dist = win[i][2];
775 out[i] = 1/(ctx->Point.Params[0]+
776 dist * (ctx->Point.Params[1] +
777 dist * ctx->Point.Params[2]));
778 }
779#endif
780}
781
782
783
784/*
785 * Distance Attenuated General CI points.
786 */
787static void dist_atten_general_ci_points( GLcontext *ctx, GLuint first,
788 GLuint last )
789{
790 struct vertex_buffer *VB = ctx->VB;
791 struct pixel_buffer *PB = ctx->PB;
792 GLuint i;
793 GLfloat psize,dsize;
794 GLfloat dist[VB_SIZE];
795 psize=CLAMP(ctx->Point.Size,MIN_POINT_SIZE,MAX_POINT_SIZE);
796
797 if (ctx->NeedEyeCoords)
798 (eye_dist_tab[VB->EyePtr->size])( dist, first, last, ctx, VB->EyePtr );
799 else
800 clip_dist( dist, first, last, ctx, VB->ClipPtr );
801
802 for (i=first;i<=last;i++) {
803 if (VB->ClipMask[i]==0) {
804 GLint x, y, z;
805 GLint x0, x1, y0, y1;
806 GLint ix, iy;
807 GLint isize, radius;
808
809 x = (GLint) VB->Win.data[i][0];
810 y = (GLint) VB->Win.data[i][1];
811 z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
812
813 dsize=psize*dist[i];
814 if(dsize>=ctx->Point.Threshold) {
815 isize=(GLint) (MIN2(dsize,ctx->Point.MaxSize)+0.5F);
816 } else {
817 isize=(GLint) (MAX2(ctx->Point.Threshold,ctx->Point.MinSize)+0.5F);
818 }
819 radius = isize >> 1;
820
821 if (isize & 1) {
822 /* odd size */
823 x0 = x - radius;
824 x1 = x + radius;
825 y0 = y - radius;
826 y1 = y + radius;
827 }
828 else {
829 /* even size */
830 x0 = (GLint) (x + 1.5F) - radius;
831 x1 = x0 + isize - 1;
832 y0 = (GLint) (y + 1.5F) - radius;
833 y1 = y0 + isize - 1;
834 }
835
836 PB_SET_INDEX( ctx, PB, VB->IndexPtr->data[i] );
837
838 for (iy=y0;iy<=y1;iy++) {
839 for (ix=x0;ix<=x1;ix++) {
840 PB_WRITE_PIXEL( PB, ix, iy, z );
841 }
842 }
843 PB_CHECK_FLUSH(ctx,PB);
844 }
845 }
846}
847
848/*
849 * Distance Attenuated General RGBA points.
850 */
851static void dist_atten_general_rgba_points( GLcontext *ctx, GLuint first,
852 GLuint last )
853{
854 struct vertex_buffer *VB = ctx->VB;
855 struct pixel_buffer *PB = ctx->PB;
856 GLuint i;
857 GLubyte alpha;
858 GLfloat psize,dsize;
859 GLfloat dist[VB_SIZE];
860 psize=CLAMP(ctx->Point.Size,MIN_POINT_SIZE,MAX_POINT_SIZE);
861
862 if (ctx->NeedEyeCoords)
863 (eye_dist_tab[VB->EyePtr->size])( dist, first, last, ctx, VB->EyePtr );
864 else
865 clip_dist( dist, first, last, ctx, VB->ClipPtr );
866
867 for (i=first;i<=last;i++) {
868 if (VB->ClipMask[i]==0) {
869 GLint x, y, z;
870 GLint x0, x1, y0, y1;
871 GLint ix, iy;
872 GLint isize, radius;
873
874 x = (GLint) VB->Win.data[i][0];
875 y = (GLint) VB->Win.data[i][1];
876 z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
877 dsize=psize*dist[i];
878 if (dsize >= ctx->Point.Threshold) {
879 isize = (GLint) (MIN2(dsize,ctx->Point.MaxSize)+0.5F);
880 alpha = VB->ColorPtr->data[i][3];
881 }
882 else {
883 isize = (GLint) (MAX2(ctx->Point.Threshold,ctx->Point.MinSize)+0.5F);
884 dsize /= ctx->Point.Threshold;
885 alpha = (GLint) (VB->ColorPtr->data[i][3]* (dsize*dsize));
886 }
887 radius = isize >> 1;
888
889 if (isize & 1) {
890 /* odd size */
891 x0 = x - radius;
892 x1 = x + radius;
893 y0 = y - radius;
894 y1 = y + radius;
895 }
896 else {
897 /* even size */
898 x0 = (GLint) (x + 1.5F) - radius;
899 x1 = x0 + isize - 1;
900 y0 = (GLint) (y + 1.5F) - radius;
901 y1 = y0 + isize - 1;
902 }
903
904 PB_SET_COLOR( ctx, PB,
905 VB->ColorPtr->data[i][0],
906 VB->ColorPtr->data[i][1],
907 VB->ColorPtr->data[i][2],
908 alpha );
909
910 for (iy=y0;iy<=y1;iy++) {
911 for (ix=x0;ix<=x1;ix++) {
912 PB_WRITE_PIXEL( PB, ix, iy, z );
913 }
914 }
915 PB_CHECK_FLUSH(ctx,PB);
916 }
917 }
918}
919
920/*
921 * Distance Attenuated Textured RGBA points.
922 */
923static void dist_atten_textured_rgba_points( GLcontext *ctx, GLuint first,
924 GLuint last )
925{
926 struct vertex_buffer *VB = ctx->VB;
927 struct pixel_buffer *PB = ctx->PB;
928 GLuint i;
929 GLfloat psize,dsize;
930 GLfloat dist[VB_SIZE];
931 psize=CLAMP(ctx->Point.Size,MIN_POINT_SIZE,MAX_POINT_SIZE);
932
933 if (ctx->NeedEyeCoords)
934 (eye_dist_tab[VB->EyePtr->size])( dist, first, last, ctx, VB->EyePtr );
935 else
936 clip_dist( dist, first, last, ctx, VB->ClipPtr );
937
938 for (i=first;i<=last;i++) {
939 if (VB->ClipMask[i]==0) {
940 GLint x, y, z;
941 GLint x0, x1, y0, y1;
942 GLint ix, iy;
943 GLint isize, radius;
944 GLint red, green, blue, alpha;
945 GLfloat s, t, u;
946 GLfloat s1, t1, u1;
947
948 x = (GLint) VB->Win.data[i][0];
949 y = (GLint) VB->Win.data[i][1];
950 z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
951
952 dsize=psize*dist[i];
953 if(dsize>=ctx->Point.Threshold) {
954 isize=(GLint) (MIN2(dsize,ctx->Point.MaxSize)+0.5F);
955 alpha=VB->ColorPtr->data[i][3];
956 } else {
957 isize=(GLint) (MAX2(ctx->Point.Threshold,ctx->Point.MinSize)+0.5F);
958 dsize/=ctx->Point.Threshold;
959 alpha = (GLint) (VB->ColorPtr->data[i][3]* (dsize*dsize));
960 }
961
962 if (isize<1) {
963 isize = 1;
964 }
965 radius = isize >> 1;
966
967 if (isize & 1) {
968 /* odd size */
969 x0 = x - radius;
970 x1 = x + radius;
971 y0 = y - radius;
972 y1 = y + radius;
973 }
974 else {
975 /* even size */
976 x0 = (GLint) (x + 1.5F) - radius;
977 x1 = x0 + isize - 1;
978 y0 = (GLint) (y + 1.5F) - radius;
979 y1 = y0 + isize - 1;
980 }
981
982 red = VB->ColorPtr->data[i][0];
983 green = VB->ColorPtr->data[i][1];
984 blue = VB->ColorPtr->data[i][2];
985
986 switch (VB->TexCoordPtr[0]->size) {
987 case 4:
988 s = (VB->TexCoordPtr[0]->data[i][0]/
989 VB->TexCoordPtr[0]->data[i][3]);
990 t = (VB->TexCoordPtr[0]->data[i][1]/
991 VB->TexCoordPtr[0]->data[i][3]);
992 u = (VB->TexCoordPtr[0]->data[i][2]/
993 VB->TexCoordPtr[0]->data[i][3]);
994 break;
995 case 3:
996 s = VB->TexCoordPtr[0]->data[i][0];
997 t = VB->TexCoordPtr[0]->data[i][1];
998 u = VB->TexCoordPtr[0]->data[i][2];
999 break;
1000 case 2:
1001 s = VB->TexCoordPtr[0]->data[i][0];
1002 t = VB->TexCoordPtr[0]->data[i][1];
1003 u = 0.0;
1004 break;
1005 case 1:
1006 s = VB->TexCoordPtr[0]->data[i][0];
1007 t = 0.0;
1008 u = 0.0;
1009 break;
1010 default:
1011 /* should never get here */
1012 s = t = u = 0.0;
1013 gl_problem(ctx, "unexpected texcoord size in dist_atten_textured_rgba_points()");
1014 }
1015
1016 if (ctx->Texture.ReallyEnabled >= TEXTURE1_1D) {
1017 /* Multitextured! This is probably a slow enough path that
1018 there's no reason to specialize the multitexture case. */
1019 switch (VB->TexCoordPtr[1]->size) {
1020 case 4:
1021 s1 = ( VB->TexCoordPtr[1]->data[i][0] /
1022 VB->TexCoordPtr[1]->data[i][3] );
1023 t1 = ( VB->TexCoordPtr[1]->data[i][1] /
1024 VB->TexCoordPtr[1]->data[i][3] );
1025 u1 = ( VB->TexCoordPtr[1]->data[i][2] /
1026 VB->TexCoordPtr[1]->data[i][3] );
1027 break;
1028 case 3:
1029 s1 = VB->TexCoordPtr[1]->data[i][0];
1030 t1 = VB->TexCoordPtr[1]->data[i][1];
1031 u1 = VB->TexCoordPtr[1]->data[i][2];
1032 break;
1033 case 2:
1034 s1 = VB->TexCoordPtr[1]->data[i][0];
1035 t1 = VB->TexCoordPtr[1]->data[i][1];
1036 u1 = 0.0;
1037 break;
1038 case 1:
1039 s1 = VB->TexCoordPtr[1]->data[i][0];
1040 t1 = 0.0;
1041 u1 = 0.0;
1042 break;
1043 default:
1044 /* should never get here */
1045 s1 = t1 = u1 = 0.0;
1046 gl_problem(ctx, "unexpected texcoord size in dist_atten_textured_rgba_points()");
1047 }
1048 }
1049
1050/* don't think this is needed
1051 PB_SET_COLOR( red, green, blue, alpha );
1052*/
1053
1054 for (iy=y0;iy<=y1;iy++) {
1055 for (ix=x0;ix<=x1;ix++) {
1056 if (ctx->Texture.ReallyEnabled >= TEXTURE1_1D) {
1057 PB_WRITE_MULTITEX_PIXEL( PB, ix, iy, z, red, green, blue, alpha, s, t, u, s1, t1, u1 );
1058 } else {
1059 PB_WRITE_TEX_PIXEL( PB, ix, iy, z, red, green, blue, alpha, s, t, u );
1060 }
1061 }
1062 }
1063 PB_CHECK_FLUSH(ctx,PB);
1064 }
1065 }
1066}
1067
1068/*
1069 * Distance Attenuated Antialiased points with or without texture mapping.
1070 */
1071static void dist_atten_antialiased_rgba_points( GLcontext *ctx,
1072 GLuint first, GLuint last )
1073{
1074 struct vertex_buffer *VB = ctx->VB;
1075 struct pixel_buffer *PB = ctx->PB;
1076 GLuint i;
1077 GLfloat radius, rmin, rmax, rmin2, rmax2, cscale;
1078 GLfloat psize,dsize,alphaf;
1079 GLfloat dist[VB_SIZE];
1080 psize=CLAMP(ctx->Point.Size,MIN_POINT_SIZE,MAX_POINT_SIZE);
1081
1082 if (ctx->NeedEyeCoords)
1083 (eye_dist_tab[VB->EyePtr->size])( dist, first, last, ctx, VB->EyePtr );
1084 else
1085 clip_dist( dist, first, last, ctx, VB->ClipPtr );
1086
1087 if (ctx->Texture.ReallyEnabled) {
1088 for (i=first;i<=last;i++) {
1089 if (VB->ClipMask[i]==0) {
1090 GLint xmin, ymin, xmax, ymax;
1091 GLint x, y, z;
1092 GLint red, green, blue, alpha;
1093 GLfloat s, t, u;
1094 GLfloat s1, t1, u1;
1095
1096 dsize=psize*dist[i];
1097 if(dsize>=ctx->Point.Threshold) {
1098 radius=(MIN2(dsize,ctx->Point.MaxSize)*0.5F);
1099 alphaf=1.0;
1100 } else {
1101 radius=(MAX2(ctx->Point.Threshold,ctx->Point.MinSize)*0.5F);
1102 dsize/=ctx->Point.Threshold;
1103 alphaf=(dsize*dsize);
1104 }
1105 rmin = radius - 0.7071F; /* 0.7071 = sqrt(2)/2 */
1106 rmax = radius + 0.7071F;
1107 rmin2 = rmin*rmin;
1108 rmax2 = rmax*rmax;
1109 cscale = 256.0F / (rmax2-rmin2);
1110
1111 xmin = (GLint) (VB->Win.data[i][0] - radius);
1112 xmax = (GLint) (VB->Win.data[i][0] + radius);
1113 ymin = (GLint) (VB->Win.data[i][1] - radius);
1114 ymax = (GLint) (VB->Win.data[i][1] + radius);
1115 z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
1116
1117 red = VB->ColorPtr->data[i][0];
1118 green = VB->ColorPtr->data[i][1];
1119 blue = VB->ColorPtr->data[i][2];
1120
1121 switch (VB->TexCoordPtr[0]->size) {
1122 case 4:
1123 s = (VB->TexCoordPtr[0]->data[i][0]/
1124 VB->TexCoordPtr[0]->data[i][3]);
1125 t = (VB->TexCoordPtr[0]->data[i][1]/
1126 VB->TexCoordPtr[0]->data[i][3]);
1127 u = (VB->TexCoordPtr[0]->data[i][2]/
1128 VB->TexCoordPtr[0]->data[i][3]);
1129 break;
1130 case 3:
1131 s = VB->TexCoordPtr[0]->data[i][0];
1132 t = VB->TexCoordPtr[0]->data[i][1];
1133 u = VB->TexCoordPtr[0]->data[i][2];
1134 break;
1135 case 2:
1136 s = VB->TexCoordPtr[0]->data[i][0];
1137 t = VB->TexCoordPtr[0]->data[i][1];
1138 u = 0.0;
1139 break;
1140 case 1:
1141 s = VB->TexCoordPtr[0]->data[i][0];
1142 t = 0.0;
1143 u = 0.0;
1144 break;
1145 default:
1146 /* should never get here */
1147 s = t = u = 0.0;
1148 gl_problem(ctx, "unexpected texcoord size in dist_atten_antialiased_rgba_points()");
1149 }
1150
1151 if (ctx->Texture.ReallyEnabled >= TEXTURE1_1D) {
1152 /* Multitextured! This is probably a slow enough path that
1153 there's no reason to specialize the multitexture case. */
1154 switch (VB->TexCoordPtr[1]->size) {
1155 case 4:
1156 s1 = ( VB->TexCoordPtr[1]->data[i][0] /
1157 VB->TexCoordPtr[1]->data[i][3] );
1158 t1 = ( VB->TexCoordPtr[1]->data[i][1] /
1159 VB->TexCoordPtr[1]->data[i][3] );
1160 u1 = ( VB->TexCoordPtr[1]->data[i][2] /
1161 VB->TexCoordPtr[1]->data[i][3] );
1162 break;
1163 case 3:
1164 s1 = VB->TexCoordPtr[1]->data[i][0];
1165 t1 = VB->TexCoordPtr[1]->data[i][1];
1166 u1 = VB->TexCoordPtr[1]->data[i][2];
1167 break;
1168 case 2:
1169 s1 = VB->TexCoordPtr[1]->data[i][0];
1170 t1 = VB->TexCoordPtr[1]->data[i][1];
1171 u1 = 0.0;
1172 break;
1173 case 1:
1174 s1 = VB->TexCoordPtr[1]->data[i][0];
1175 t1 = 0.0;
1176 u1 = 0.0;
1177 break;
1178 default:
1179 /* should never get here */
1180 s = t = u = 0.0;
1181 gl_problem(ctx, "unexpected texcoord size in dist_atten_antialiased_rgba_points()");
1182 }
1183 }
1184
1185 for (y=ymin;y<=ymax;y++) {
1186 for (x=xmin;x<=xmax;x++) {
1187 GLfloat dx = x/*+0.5F*/ - VB->Win.data[i][0];
1188 GLfloat dy = y/*+0.5F*/ - VB->Win.data[i][1];
1189 GLfloat dist2 = dx*dx + dy*dy;
1190 if (dist2<rmax2) {
1191 alpha = VB->ColorPtr->data[i][3];
1192 if (dist2>=rmin2) {
1193 GLint coverage = (GLint) (256.0F-(dist2-rmin2)*cscale);
1194 /* coverage is in [0,256] */
1195 alpha = (alpha * coverage) >> 8;
1196 }
1197 alpha = (GLint) (alpha * alphaf);
1198 if (ctx->Texture.ReallyEnabled >= TEXTURE1_1D) {
1199 PB_WRITE_MULTITEX_PIXEL( PB, x,y,z, red, green, blue, alpha, s, t, u, s1, t1, u1 );
1200 } else {
1201 PB_WRITE_TEX_PIXEL( PB, x,y,z, red, green, blue, alpha, s, t, u );
1202 }
1203 }
1204 }
1205 }
1206 PB_CHECK_FLUSH(ctx,PB);
1207 }
1208 }
1209 }
1210 else {
1211 /* Not texture mapped */
1212 for (i=first;i<=last;i++) {
1213 if (VB->ClipMask[i]==0) {
1214 GLint xmin, ymin, xmax, ymax;
1215 GLint x, y, z;
1216 GLint red, green, blue, alpha;
1217
1218 dsize=psize*dist[i];
1219 if(dsize>=ctx->Point.Threshold) {
1220 radius=(MIN2(dsize,ctx->Point.MaxSize)*0.5F);
1221 alphaf=1.0;
1222 } else {
1223 radius=(MAX2(ctx->Point.Threshold,ctx->Point.MinSize)*0.5F);
1224 dsize/=ctx->Point.Threshold;
1225 alphaf=(dsize*dsize);
1226 }
1227 rmin = radius - 0.7071F; /* 0.7071 = sqrt(2)/2 */
1228 rmax = radius + 0.7071F;
1229 rmin2 = rmin*rmin;
1230 rmax2 = rmax*rmax;
1231 cscale = 256.0F / (rmax2-rmin2);
1232
1233 xmin = (GLint) (VB->Win.data[i][0] - radius);
1234 xmax = (GLint) (VB->Win.data[i][0] + radius);
1235 ymin = (GLint) (VB->Win.data[i][1] - radius);
1236 ymax = (GLint) (VB->Win.data[i][1] + radius);
1237 z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
1238
1239 red = VB->ColorPtr->data[i][0];
1240 green = VB->ColorPtr->data[i][1];
1241 blue = VB->ColorPtr->data[i][2];
1242
1243 for (y=ymin;y<=ymax;y++) {
1244 for (x=xmin;x<=xmax;x++) {
1245 GLfloat dx = x/*+0.5F*/ - VB->Win.data[i][0];
1246 GLfloat dy = y/*+0.5F*/ - VB->Win.data[i][1];
1247 GLfloat dist2 = dx*dx + dy*dy;
1248 if (dist2<rmax2) {
1249 alpha = VB->ColorPtr->data[i][3];
1250 if (dist2>=rmin2) {
1251 GLint coverage = (GLint) (256.0F-(dist2-rmin2)*cscale);
1252 /* coverage is in [0,256] */
1253 alpha = (alpha * coverage) >> 8;
1254 }
1255 alpha = (GLint) (alpha * alphaf);
1256 PB_WRITE_RGBA_PIXEL( PB, x, y, z, red, green, blue, alpha )
1257 ;
1258 }
1259 }
1260 }
1261 PB_CHECK_FLUSH(ctx,PB);
1262 }
1263 }
1264 }
1265}
1266
1267
1268/*
1269 * Examine the current context to determine which point drawing function
1270 * should be used.
1271 */
1272void gl_set_point_function( GLcontext *ctx )
1273{
1274 GLboolean rgbmode = ctx->Visual->RGBAflag;
1275
1276 if (ctx->RenderMode==GL_RENDER) {
1277 if (ctx->NoRaster) {
1278 ctx->Driver.PointsFunc = null_points;
1279 return;
1280 }
1281 if (ctx->Driver.PointsFunc) {
1282 /* Device driver will draw points. */
1283 ctx->IndirectTriangles &= ~DD_POINT_SW_RASTERIZE;
1284 return;
1285 }
1286
1287 if (!ctx->Point.Attenuated) {
1288 if (ctx->Point.SmoothFlag && rgbmode) {
1289 ctx->Driver.PointsFunc = antialiased_rgba_points;
1290 }
1291 else if (ctx->Texture.ReallyEnabled) {
1292 if (ctx->Texture.ReallyEnabled >= TEXTURE1_1D) {
1293 ctx->Driver.PointsFunc = multitextured_rgba_points;
1294 }
1295 else {
1296 ctx->Driver.PointsFunc = textured_rgba_points;
1297 }
1298 }
1299 else if (ctx->Point.Size==1.0) {
1300 /* size=1, any raster ops */
1301 if (rgbmode)
1302 ctx->Driver.PointsFunc = size1_rgba_points;
1303 else
1304 ctx->Driver.PointsFunc = size1_ci_points;
1305 }
1306 else {
1307 /* every other kind of point rendering */
1308 if (rgbmode)
1309 ctx->Driver.PointsFunc = general_rgba_points;
1310 else
1311 ctx->Driver.PointsFunc = general_ci_points;
1312 }
1313 }
1314 else if(ctx->Point.SmoothFlag && rgbmode) {
1315 ctx->Driver.PointsFunc = dist_atten_antialiased_rgba_points;
1316 }
1317 else if (ctx->Texture.ReallyEnabled) {
1318 ctx->Driver.PointsFunc = dist_atten_textured_rgba_points;
1319 }
1320 else {
1321 /* every other kind of point rendering */
1322 if (rgbmode)
1323 ctx->Driver.PointsFunc = dist_atten_general_rgba_points;
1324 else
1325 ctx->Driver.PointsFunc = dist_atten_general_ci_points;
1326 }
1327 }
1328 else if (ctx->RenderMode==GL_FEEDBACK) {
1329 ctx->Driver.PointsFunc = gl_feedback_points;
1330 }
1331 else {
1332 /* GL_SELECT mode */
1333 ctx->Driver.PointsFunc = gl_select_points;
1334 }
1335
1336}
1337
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