source: branches/swt/src/opengl/mesa/3dfx/fxspan.c

Last change on this file was 2938, checked in by sandervl, 26 years ago

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1/* -*- mode: C; tab-width:8; c-basic-offset:2 -*- */
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 *
27 * Original Mesa / 3Dfx device driver (C) 1999 David Bucciarelli, by the
28 * terms stated above.
29 *
30 * Thank you for your contribution, David!
31 *
32 * Please make note of the above copyright/license statement. If you
33 * contributed code or bug fixes to this code under the previous (GNU
34 * Library) license and object to the new license, your code will be
35 * removed at your request. Please see the Mesa docs/COPYRIGHT file
36 * for more information.
37 *
38 * Additional Mesa/3Dfx driver developers:
39 * Daryll Strauss <daryll@precisioninsight.com>
40 * Keith Whitwell <keith@precisioninsight.com>
41 *
42 * See fxapi.h for more revision/author details.
43 */
44
45
46/* fxdd.c - 3Dfx VooDoo Mesa span and pixel functions */
47
48
49#ifdef HAVE_CONFIG_H
50#include "conf.h"
51#endif
52
53#if defined(FX)
54
55#include "fxdrv.h"
56
57#ifdef _MSC_VER
58#ifdef _WIN32
59#pragma warning( disable : 4090 4022 )
60/* 4101 : "different 'const' qualifier"
61 * 4022 : "pointer mistmatch for actual parameter 'n'
62 */
63#endif
64#endif
65
66/************************************************************************/
67/***** Span functions *****/
68/************************************************************************/
69
70static void fxDDWriteRGBASpan(const GLcontext *ctx,
71 GLuint n, GLint x, GLint y,
72 const GLubyte rgba[][4], const GLubyte mask[])
73{
74 fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
75 GLuint i;
76 GLint bottom=fxMesa->height-1;
77
78 if (MESA_VERBOSE&VERBOSE_DRIVER) {
79 fprintf(stderr,"fxmesa: fxDDWriteRGBASpan(...)\n");
80 }
81
82 if (mask) {
83 int span=0;
84
85 for (i=0;i<n;i++) {
86 if (mask[i]) {
87 ++span;
88 } else {
89 if (span > 0) {
90 grLfbWriteRegion( fxMesa->currentFB, x+i-span, bottom-y,
91 GR_LFB_SRC_FMT_8888, span, 1, 0, (void *) rgba[i-span] );
92 span = 0;
93 }
94 }
95 }
96
97 if (span > 0)
98 grLfbWriteRegion( fxMesa->currentFB, x+n-span, bottom-y,
99 GR_LFB_SRC_FMT_8888, span, 1, 0, (void *) rgba[n-span] );
100 } else
101 grLfbWriteRegion( fxMesa->currentFB, x, bottom-y, GR_LFB_SRC_FMT_8888,
102 n, 1, 0, (void *) rgba );
103}
104
105
106static void fxDDWriteRGBSpan(const GLcontext *ctx,
107 GLuint n, GLint x, GLint y,
108 const GLubyte rgb[][3], const GLubyte mask[])
109{
110 fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
111 GLuint i;
112 GLint bottom=fxMesa->height-1;
113 GLubyte rgba[MAX_WIDTH][4];
114
115 if (MESA_VERBOSE&VERBOSE_DRIVER) {
116 fprintf(stderr,"fxmesa: fxDDWriteRGBSpan()\n");
117 }
118
119 if (mask) {
120 int span=0;
121
122 for (i=0;i<n;i++) {
123 if (mask[i]) {
124 rgba[span][0] = rgb[i][0];
125 rgba[span][1] = rgb[i][1];
126 rgba[span][2] = rgb[i][2];
127 rgba[span][3] = 255;
128 ++span;
129 } else {
130 if (span > 0) {
131 grLfbWriteRegion( fxMesa->currentFB, x+i-span, bottom-y,
132 GR_LFB_SRC_FMT_8888, span, 1, 0, (void *) rgba );
133 span = 0;
134 }
135 }
136 }
137
138 if (span > 0)
139 grLfbWriteRegion( fxMesa->currentFB, x+n-span, bottom-y,
140 GR_LFB_SRC_FMT_8888, span, 1, 0, (void *) rgba );
141 } else {
142 for (i=0;i<n;i++) {
143 rgba[i][0]=rgb[i][0];
144 rgba[i][1]=rgb[i][1];
145 rgba[i][2]=rgb[i][2];
146 rgba[i][3]=255;
147 }
148
149 grLfbWriteRegion( fxMesa->currentFB, x, bottom-y, GR_LFB_SRC_FMT_8888,
150 n, 1, 0, (void *) rgba );
151 }
152}
153
154
155static void fxDDWriteMonoRGBASpan(const GLcontext *ctx,
156 GLuint n, GLint x, GLint y,
157 const GLubyte mask[])
158{
159 fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
160 GLuint i;
161 GLint bottom=fxMesa->height-1;
162 GLuint data[MAX_WIDTH];
163
164 if (MESA_VERBOSE&VERBOSE_DRIVER) {
165 fprintf(stderr,"fxmesa: fxDDWriteMonoRGBASpan(...)\n");
166 }
167
168 if (mask) {
169 int span=0;
170
171 for (i=0;i<n;i++) {
172 if (mask[i]) {
173 data[span] = (GLuint) fxMesa->color;
174 ++span;
175 } else {
176 if (span > 0) {
177 grLfbWriteRegion( fxMesa->currentFB, x+i-span, bottom-y,
178 GR_LFB_SRC_FMT_8888, span, 1, 0,
179 (void *) data );
180 span = 0;
181 }
182 }
183 }
184
185 if (span > 0)
186 grLfbWriteRegion( fxMesa->currentFB, x+n-span, bottom-y,
187 GR_LFB_SRC_FMT_8888, span, 1, 0,
188 (void *) data );
189 } else {
190 for (i=0;i<n;i++) {
191 data[i]=(GLuint) fxMesa->color;
192 }
193
194 grLfbWriteRegion( fxMesa->currentFB, x, bottom-y, GR_LFB_SRC_FMT_8888,
195 n, 1, 0, (void *) data );
196 }
197}
198
199
200static void fxDDReadRGBASpan(const GLcontext *ctx,
201 GLuint n, GLint x, GLint y, GLubyte rgba[][4])
202{
203 fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
204 GLushort data[MAX_WIDTH];
205 GLuint i;
206 GLint bottom=fxMesa->height-1;
207
208 if (MESA_VERBOSE&VERBOSE_DRIVER) {
209 fprintf(stderr,"fxmesa: fxDDReadRGBASpan(...)\n");
210 }
211
212 assert(n < MAX_WIDTH);
213
214 grLfbReadRegion( fxMesa->currentFB, x, bottom-y, n, 1, 0, data);
215 for (i=0;i<n;i++) {
216 rgba[i][RCOMP]=(data[i] & 0x001f) << 3;
217 rgba[i][GCOMP]=(data[i] & 0x07e0) >> 3;
218 rgba[i][BCOMP]=(data[i] & 0xf800) >> 8;
219 rgba[i][ACOMP]=255;
220 }
221}
222
223/************************************************************************/
224/***** Pixel functions *****/
225/************************************************************************/
226
227static void fxDDWriteRGBAPixels(const GLcontext *ctx,
228 GLuint n, const GLint x[], const GLint y[],
229 CONST GLubyte rgba[][4], const GLubyte mask[])
230{
231 fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
232 GLuint i;
233 GLint bottom=fxMesa->height-1;
234
235 if (MESA_VERBOSE&VERBOSE_DRIVER) {
236 fprintf(stderr,"fxmesa: fxDDWriteRGBAPixels(...)\n");
237 }
238
239 for(i=0;i<n;i++)
240 if(mask[i])
241 grLfbWriteRegion(fxMesa->currentFB,x[i],bottom-y[i],
242 GR_LFB_SRC_FMT_8888,1,1,0,(void *) rgba[i]);
243}
244
245static void fxDDWriteMonoRGBAPixels(const GLcontext *ctx,
246 GLuint n, const GLint x[], const GLint y[],
247 const GLubyte mask[])
248{
249 fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
250 GLuint i;
251 GLint bottom=fxMesa->height-1;
252
253 if (MESA_VERBOSE&VERBOSE_DRIVER) {
254 fprintf(stderr,"fxmesa: fxDDWriteMonoRGBAPixels(...)\n");
255 }
256
257 for(i=0;i<n;i++)
258 if(mask[i])
259 grLfbWriteRegion(fxMesa->currentFB,x[i],bottom-y[i],
260 GR_LFB_SRC_FMT_8888,1,1,0,(void *) fxMesa->color);
261}
262
263static void fxDDReadRGBAPixels(const GLcontext *ctx,
264 GLuint n, const GLint x[], const GLint y[],
265 GLubyte rgba[][4], const GLubyte mask[])
266{
267 fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
268 GLuint i;
269 GLint bottom=fxMesa->height-1;
270 GLushort data;
271
272 if (MESA_VERBOSE&VERBOSE_DRIVER) {
273 fprintf(stderr,"fxmesa: fxDDReadRGBAPixels(...)\n");
274 }
275
276 for(i=0;i<n;i++)
277 if(mask[i]) {
278 grLfbReadRegion(fxMesa->currentFB,x[i],bottom-y[i],1,1,0,&data);
279 rgba[i][RCOMP]=(data & 0x001f) << 3;
280 rgba[i][GCOMP]=(data & 0x07e0) >> 3;
281 rgba[i][BCOMP]=(data & 0xf800) >> 8;
282
283 /* the alpha value should be read from the auxiliary buffer when required */
284
285 rgba[i][ACOMP]=255;
286 }
287}
288
289/************************************************************************/
290/***** Depth functions *****/
291/************************************************************************/
292
293static void fxDDReadDepthSpanFloat(GLcontext *ctx,
294 GLuint n, GLint x, GLint y, GLfloat depth[])
295{
296 fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
297 GLuint i;
298 GLint bottom=fxMesa->height-1;
299 GLushort data[MAX_WIDTH];
300
301 if (MESA_VERBOSE&VERBOSE_DRIVER) {
302 fprintf(stderr,"fxmesa: fxDDReadDepthSpanFloat(...)\n");
303 }
304
305 grLfbReadRegion(GR_BUFFER_AUXBUFFER,x,bottom-y,n,1,0,data);
306
307 /*
308 convert the read values to float values [0.0 .. 1.0].
309 */
310 for(i=0;i<n;i++)
311 depth[i]=data[i]/65535.0f;
312}
313
314static void fxDDReadDepthSpanInt(GLcontext *ctx,
315 GLuint n, GLint x, GLint y, GLdepth depth[])
316{
317 fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
318 GLint bottom=fxMesa->height-1;
319
320 if (MESA_VERBOSE&VERBOSE_DRIVER) {
321 fprintf(stderr,"fxmesa: fxDDReadDepthSpanInt(...)\n");
322 }
323
324 grLfbReadRegion(GR_BUFFER_AUXBUFFER,x,bottom-y,n,1,0,depth);
325}
326
327static GLuint fxDDDepthTestSpanGeneric(GLcontext *ctx,
328 GLuint n, GLint x, GLint y, const GLdepth z[],
329 GLubyte mask[])
330{
331 fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
332 GLushort depthdata[MAX_WIDTH];
333 GLdepth *zptr=depthdata;
334 GLubyte *m=mask;
335 GLuint i;
336 GLuint passed=0;
337 GLint bottom=fxMesa->height-1;
338
339 if (MESA_VERBOSE&VERBOSE_DRIVER) {
340 fprintf(stderr,"fxmesa: fxDDDepthTestSpanGeneric(...)\n");
341 }
342
343 grLfbReadRegion(GR_BUFFER_AUXBUFFER,x,bottom-y,n,1,0,depthdata);
344
345 /* switch cases ordered from most frequent to less frequent */
346 switch (ctx->Depth.Func) {
347 case GL_LESS:
348 if (ctx->Depth.Mask) {
349 /* Update Z buffer */
350 for (i=0; i<n; i++,zptr++,m++) {
351 if (*m) {
352 if (z[i] < *zptr) {
353 /* pass */
354 *zptr = z[i];
355 passed++;
356 } else {
357 /* fail */
358 *m = 0;
359 }
360 }
361 }
362 } else {
363 /* Don't update Z buffer */
364 for (i=0; i<n; i++,zptr++,m++) {
365 if (*m) {
366 if (z[i] < *zptr) {
367 /* pass */
368 passed++;
369 } else {
370 *m = 0;
371 }
372 }
373 }
374 }
375 break;
376 case GL_LEQUAL:
377 if (ctx->Depth.Mask) {
378 /* Update Z buffer */
379 for (i=0;i<n;i++,zptr++,m++) {
380 if (*m) {
381 if (z[i] <= *zptr) {
382 *zptr = z[i];
383 passed++;
384 } else {
385 *m = 0;
386 }
387 }
388 }
389 } else {
390 /* Don't update Z buffer */
391 for (i=0;i<n;i++,zptr++,m++) {
392 if (*m) {
393 if (z[i] <= *zptr) {
394 /* pass */
395 passed++;
396 } else {
397 *m = 0;
398 }
399 }
400 }
401 }
402 break;
403 case GL_GEQUAL:
404 if (ctx->Depth.Mask) {
405 /* Update Z buffer */
406 for (i=0;i<n;i++,zptr++,m++) {
407 if (*m) {
408 if (z[i] >= *zptr) {
409 *zptr = z[i];
410 passed++;
411 } else {
412 *m = 0;
413 }
414 }
415 }
416 } else {
417 /* Don't update Z buffer */
418 for (i=0;i<n;i++,zptr++,m++) {
419 if (*m) {
420 if (z[i] >= *zptr) {
421 /* pass */
422 passed++;
423 } else {
424 *m = 0;
425 }
426 }
427 }
428 }
429 break;
430 case GL_GREATER:
431 if (ctx->Depth.Mask) {
432 /* Update Z buffer */
433 for (i=0;i<n;i++,zptr++,m++) {
434 if (*m) {
435 if (z[i] > *zptr) {
436 *zptr = z[i];
437 passed++;
438 } else {
439 *m = 0;
440 }
441 }
442 }
443 } else {
444 /* Don't update Z buffer */
445 for (i=0;i<n;i++,zptr++,m++) {
446 if (*m) {
447 if (z[i] > *zptr) {
448 /* pass */
449 passed++;
450 } else {
451 *m = 0;
452 }
453 }
454 }
455 }
456 break;
457 case GL_NOTEQUAL:
458 if (ctx->Depth.Mask) {
459 /* Update Z buffer */
460 for (i=0;i<n;i++,zptr++,m++) {
461 if (*m) {
462 if (z[i] != *zptr) {
463 *zptr = z[i];
464 passed++;
465 } else {
466 *m = 0;
467 }
468 }
469 }
470 } else {
471 /* Don't update Z buffer */
472 for (i=0;i<n;i++,zptr++,m++) {
473 if (*m) {
474 if (z[i] != *zptr) {
475 /* pass */
476 passed++;
477 } else {
478 *m = 0;
479 }
480 }
481 }
482 }
483 break;
484 case GL_EQUAL:
485 if (ctx->Depth.Mask) {
486 /* Update Z buffer */
487 for (i=0;i<n;i++,zptr++,m++) {
488 if (*m) {
489 if (z[i] == *zptr) {
490 *zptr = z[i];
491 passed++;
492 } else {
493 *m =0;
494 }
495 }
496 }
497 } else {
498 /* Don't update Z buffer */
499 for (i=0;i<n;i++,zptr++,m++) {
500 if (*m) {
501 if (z[i] == *zptr) {
502 /* pass */
503 passed++;
504 } else {
505 *m =0;
506 }
507 }
508 }
509 }
510 break;
511 case GL_ALWAYS:
512 if (ctx->Depth.Mask) {
513 /* Update Z buffer */
514 for (i=0;i<n;i++,zptr++,m++) {
515 if (*m) {
516 *zptr = z[i];
517 passed++;
518 }
519 }
520 } else {
521 /* Don't update Z buffer or mask */
522 passed = n;
523 }
524 break;
525 case GL_NEVER:
526 for (i=0;i<n;i++) {
527 mask[i] = 0;
528 }
529 break;
530 default:
531 ;
532 } /*switch*/
533
534 if(passed)
535 grLfbWriteRegion(GR_BUFFER_AUXBUFFER,x,bottom-y,GR_LFB_SRC_FMT_ZA16,n,1,0,depthdata);
536
537 return passed;
538}
539
540static void fxDDDepthTestPixelsGeneric(GLcontext* ctx,
541 GLuint n, const GLint x[], const GLint y[],
542 const GLdepth z[], GLubyte mask[])
543{
544 fxMesaContext fxMesa=(fxMesaContext)ctx->DriverCtx;
545 GLdepth zval;
546 GLuint i;
547 GLint bottom=fxMesa->height-1;
548
549 if (MESA_VERBOSE&VERBOSE_DRIVER) {
550 fprintf(stderr,"fxmesa: fxDDDepthTestPixelsGeneric(...)\n");
551 }
552
553 /* switch cases ordered from most frequent to less frequent */
554 switch (ctx->Depth.Func) {
555 case GL_LESS:
556 if (ctx->Depth.Mask) {
557 /* Update Z buffer */
558 for (i=0; i<n; i++) {
559 if (mask[i]) {
560 grLfbReadRegion(GR_BUFFER_AUXBUFFER,x[i],bottom-y[i],1,1,0,&zval);
561 if (z[i] < zval) {
562 /* pass */
563 grLfbWriteRegion(GR_BUFFER_AUXBUFFER,x[i],bottom-y[i],GR_LFB_SRC_FMT_ZA16,1,1,0,&z[i]);
564 } else {
565 /* fail */
566 mask[i] = 0;
567 }
568 }
569 }
570 } else {
571 /* Don't update Z buffer */
572 for (i=0; i<n; i++) {
573 if (mask[i]) {
574 grLfbReadRegion(GR_BUFFER_AUXBUFFER,x[i],bottom-y[i],1,1,0,&zval);
575 if (z[i] < zval) {
576 /* pass */
577 }
578 else {
579 /* fail */
580 mask[i] = 0;
581 }
582 }
583 }
584 }
585 break;
586 case GL_LEQUAL:
587 if (ctx->Depth.Mask) {
588 /* Update Z buffer */
589 for (i=0; i<n; i++) {
590 if (mask[i]) {
591 grLfbReadRegion(GR_BUFFER_AUXBUFFER,x[i],bottom-y[i],1,1,0,&zval);
592 if (z[i] <= zval) {
593 /* pass */
594 grLfbWriteRegion(GR_BUFFER_AUXBUFFER,x[i],bottom-y[i],GR_LFB_SRC_FMT_ZA16,1,1,0,&z[i]);
595 } else {
596 /* fail */
597 mask[i] = 0;
598 }
599 }
600 }
601 } else {
602 /* Don't update Z buffer */
603 for (i=0; i<n; i++) {
604 if (mask[i]) {
605 grLfbReadRegion(GR_BUFFER_AUXBUFFER,x[i],bottom-y[i],1,1,0,&zval);
606 if (z[i] <= zval) {
607 /* pass */
608 } else {
609 /* fail */
610 mask[i] = 0;
611 }
612 }
613 }
614 }
615 break;
616 case GL_GEQUAL:
617 if (ctx->Depth.Mask) {
618 /* Update Z buffer */
619 for (i=0; i<n; i++) {
620 if (mask[i]) {
621 grLfbReadRegion(GR_BUFFER_AUXBUFFER,x[i],bottom-y[i],1,1,0,&zval);
622 if (z[i] >= zval) {
623 /* pass */
624 grLfbWriteRegion(GR_BUFFER_AUXBUFFER,x[i],bottom-y[i],GR_LFB_SRC_FMT_ZA16,1,1,0,&z[i]);
625 } else {
626 /* fail */
627 mask[i] = 0;
628 }
629 }
630 }
631 } else {
632 /* Don't update Z buffer */
633 for (i=0; i<n; i++) {
634 if (mask[i]) {
635 grLfbReadRegion(GR_BUFFER_AUXBUFFER,x[i],bottom-y[i],1,1,0,&zval);
636 if (z[i] >= zval) {
637 /* pass */
638 } else {
639 /* fail */
640 mask[i] = 0;
641 }
642 }
643 }
644 }
645 break;
646 case GL_GREATER:
647 if (ctx->Depth.Mask) {
648 /* Update Z buffer */
649 for (i=0; i<n; i++) {
650 if (mask[i]) {
651 grLfbReadRegion(GR_BUFFER_AUXBUFFER,x[i],bottom-y[i],1,1,0,&zval);
652 if (z[i] > zval) {
653 /* pass */
654 grLfbWriteRegion(GR_BUFFER_AUXBUFFER,x[i],bottom-y[i],GR_LFB_SRC_FMT_ZA16,1,1,0,&z[i]);
655 } else {
656 /* fail */
657 mask[i] = 0;
658 }
659 }
660 }
661 } else {
662 /* Don't update Z buffer */
663 for (i=0; i<n; i++) {
664 if (mask[i]) {
665 grLfbReadRegion(GR_BUFFER_AUXBUFFER,x[i],bottom-y[i],1,1,0,&zval);
666 if (z[i] > zval) {
667 /* pass */
668 } else {
669 /* fail */
670 mask[i] = 0;
671 }
672 }
673 }
674 }
675 break;
676 case GL_NOTEQUAL:
677 if (ctx->Depth.Mask) {
678 /* Update Z buffer */
679 for (i=0; i<n; i++) {
680 if (mask[i]) {
681 grLfbReadRegion(GR_BUFFER_AUXBUFFER,x[i],bottom-y[i],1,1,0,&zval);
682 if (z[i] != zval) {
683 /* pass */
684 grLfbWriteRegion(GR_BUFFER_AUXBUFFER,x[i],bottom-y[i],GR_LFB_SRC_FMT_ZA16,1,1,0,&z[i]);
685 } else {
686 /* fail */
687 mask[i] = 0;
688 }
689 }
690 }
691 } else {
692 /* Don't update Z buffer */
693 for (i=0; i<n; i++) {
694 if (mask[i]) {
695 grLfbReadRegion(GR_BUFFER_AUXBUFFER,x[i],bottom-y[i],1,1,0,&zval);
696 if (z[i] != zval) {
697 /* pass */
698 }
699 else {
700 /* fail */
701 mask[i] = 0;
702 }
703 }
704 }
705 }
706 break;
707 case GL_EQUAL:
708 if (ctx->Depth.Mask) {
709 /* Update Z buffer */
710 for (i=0; i<n; i++) {
711 if (mask[i]) {
712 grLfbReadRegion(GR_BUFFER_AUXBUFFER,x[i],bottom-y[i],1,1,0,&zval);
713 if (z[i] == zval) {
714 /* pass */
715 grLfbWriteRegion(GR_BUFFER_AUXBUFFER,x[i],bottom-y[i],GR_LFB_SRC_FMT_ZA16,1,1,0,&z[i]);
716 } else {
717 /* fail */
718 mask[i] = 0;
719 }
720 }
721 }
722 } else {
723 /* Don't update Z buffer */
724 for (i=0; i<n; i++) {
725 if (mask[i]) {
726 grLfbReadRegion(GR_BUFFER_AUXBUFFER,x[i],bottom-y[i],1,1,0,&zval);
727 if (z[i] == zval) {
728 /* pass */
729 } else {
730 /* fail */
731 mask[i] = 0;
732 }
733 }
734 }
735 }
736 break;
737 case GL_ALWAYS:
738 if (ctx->Depth.Mask) {
739 /* Update Z buffer */
740 for (i=0; i<n; i++) {
741 if (mask[i]) {
742 grLfbWriteRegion(GR_BUFFER_AUXBUFFER,x[i],bottom-y[i],GR_LFB_SRC_FMT_ZA16,1,1,0,&z[i]);
743 }
744 }
745 } else {
746 /* Don't update Z buffer or mask */
747 }
748 break;
749 case GL_NEVER:
750 /* depth test never passes */
751 for (i=0;i<n;i++) {
752 mask[i] = 0;
753 }
754 break;
755 default:
756 ;
757 } /*switch*/
758}
759
760/************************************************************************/
761
762void fxUpdateDDSpanPointers(GLcontext *ctx)
763{
764 ctx->Driver.DepthTestSpan=fxDDDepthTestSpanGeneric;
765 ctx->Driver.DepthTestPixels=fxDDDepthTestPixelsGeneric;
766
767 ctx->Driver.ReadDepthSpanFloat=fxDDReadDepthSpanFloat;
768 ctx->Driver.ReadDepthSpanInt=fxDDReadDepthSpanInt;
769}
770
771void fxSetupDDSpanPointers(GLcontext *ctx)
772{
773 ctx->Driver.WriteRGBASpan =fxDDWriteRGBASpan;
774 ctx->Driver.WriteRGBSpan =fxDDWriteRGBSpan;
775 ctx->Driver.WriteMonoRGBASpan =fxDDWriteMonoRGBASpan;
776 ctx->Driver.WriteRGBAPixels =fxDDWriteRGBAPixels;
777 ctx->Driver.WriteMonoRGBAPixels =fxDDWriteMonoRGBAPixels;
778
779 ctx->Driver.WriteCI8Span =NULL;
780 ctx->Driver.WriteCI32Span =NULL;
781 ctx->Driver.WriteMonoCISpan =NULL;
782 ctx->Driver.WriteCI32Pixels =NULL;
783 ctx->Driver.WriteMonoCIPixels =NULL;
784
785 ctx->Driver.ReadRGBASpan =fxDDReadRGBASpan;
786 ctx->Driver.ReadRGBAPixels =fxDDReadRGBAPixels;
787
788 ctx->Driver.ReadCI32Span =NULL;
789 ctx->Driver.ReadCI32Pixels =NULL;
790}
791
792
793#else
794
795
796/*
797 * Need this to provide at least one external definition.
798 */
799
800int gl_fx_dummy_function_span(void)
801{
802 return 0;
803}
804
805#endif /* FX */
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