1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
|
/*
* Mesa 3-D graphics library
* Version: 6.5
*
* Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* This file contains "accelerated" point, line, and triangle functions.
* It should be fairly easy to write new special-purpose point, line or
* triangle functions and hook them into this module.
*/
#include "glxheader.h"
#include "depth.h"
#include "macros.h"
#include "mtypes.h"
#include "xmesaP.h"
/* Internal swrast includes:
*/
#include "swrast/s_depth.h"
#include "swrast/s_points.h"
#include "swrast/s_lines.h"
#include "swrast/s_context.h"
/**********************************************************************/
/*** Point rendering ***/
/**********************************************************************/
/*
* Render an array of points into a pixmap, any pixel format.
*/
#if 000
/* XXX don't use this, it doesn't dither correctly */
static void draw_points_ANY_pixmap( GLcontext *ctx, const SWvertex *vert )
{
XMesaContext xmesa = XMESA_CONTEXT(ctx);
XMesaDisplay *dpy = xmesa->xm_visual->display;
XMesaDrawable buffer = xmesa->xm_buffer->buffer;
XMesaGC gc = xmesa->xm_buffer->gc;
if (xmesa->xm_visual->mesa_visual.RGBAflag) {
register int x, y;
const GLubyte *color = vert->color;
unsigned long pixel = xmesa_color_to_pixel( xmesa,
color[0], color[1],
color[2], color[3],
xmesa->pixelformat);
XMesaSetForeground( dpy, gc, pixel );
x = (GLint) vert->win[0];
y = YFLIP( xrb, (GLint) vert->win[1] );
XMesaDrawPoint( dpy, buffer, gc, x, y);
}
else {
/* Color index mode */
register int x, y;
XMesaSetForeground( dpy, gc, vert->index );
x = (GLint) vert->win[0];
y = YFLIP( xrb, (GLint) vert->win[1] );
XMesaDrawPoint( dpy, buffer, gc, x, y);
}
}
#endif
/* Override the swrast point-selection function. Try to use one of
* our internal point functions, otherwise fall back to the standard
* swrast functions.
*/
void xmesa_choose_point( GLcontext *ctx )
{
#if 0
XMesaContext xmesa = XMESA_CONTEXT(ctx);
SWcontext *swrast = SWRAST_CONTEXT(ctx);
if (ctx->RenderMode == GL_RENDER
&& ctx->Point.Size == 1.0F && !ctx->Point.SmoothFlag
&& swrast->_RasterMask == 0
&& !ctx->Texture._EnabledUnits
&& xmesa->xm_buffer->buffer != XIMAGE) {
swrast->Point = draw_points_ANY_pixmap;
}
else {
_swrast_choose_point( ctx );
}
#else
_swrast_choose_point( ctx );
#endif
}
/**********************************************************************/
/*** Line rendering ***/
/**********************************************************************/
#define GET_XRB(XRB) struct xmesa_renderbuffer *XRB = \
xmesa_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0][0]->Wrapped)
/*
* Draw a flat-shaded, PF_TRUECOLOR line into an XImage.
*/
#define NAME flat_TRUECOLOR_line
#define SETUP_CODE \
XMesaContext xmesa = XMESA_CONTEXT(ctx); \
GET_XRB(xrb); \
const GLubyte *color = vert1->color; \
unsigned long pixel; \
PACK_TRUECOLOR( pixel, color[0], color[1], color[2] );
#define CLIP_HACK 1
#define PLOT(X,Y) XMesaPutPixel(xrb->ximage, X, YFLIP(xrb, Y), pixel );
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, PF_8A8B8G8R line into an XImage.
*/
#define NAME flat_8A8B8G8R_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color; \
GLuint pixel = PACK_8B8G8R( color[0], color[1], color[2] );
#define PIXEL_TYPE GLuint
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR4(xrb, X, Y)
#define CLIP_HACK 1
#define PLOT(X,Y) *pixelPtr = pixel;
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, PF_8A8R8G8B line into an XImage.
*/
#define NAME flat_8A8R8G8B_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color; \
GLuint pixel = PACK_8R8G8B( color[0], color[1], color[2] );
#define PIXEL_TYPE GLuint
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR4(xrb, X, Y)
#define CLIP_HACK 1
#define PLOT(X,Y) *pixelPtr = pixel;
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, PF_8R8G8B line into an XImage.
*/
#define NAME flat_8R8G8B_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color; \
GLuint pixel = PACK_8R8G8B( color[0], color[1], color[2] );
#define PIXEL_TYPE GLuint
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR4(xrb, X, Y)
#define CLIP_HACK 1
#define PLOT(X,Y) *pixelPtr = pixel;
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, PF_8R8G8B24 line into an XImage.
*/
#define NAME flat_8R8G8B24_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color;
#define PIXEL_TYPE bgr_t
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR3(xrb, X, Y)
#define CLIP_HACK 1
#define PLOT(X,Y) { \
pixelPtr->r = color[RCOMP]; \
pixelPtr->g = color[GCOMP]; \
pixelPtr->b = color[BCOMP]; \
}
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, PF_5R6G5B line into an XImage.
*/
#define NAME flat_5R6G5B_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color; \
GLushort pixel = PACK_5R6G5B( color[0], color[1], color[2] );
#define PIXEL_TYPE GLushort
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR2(xrb, X, Y)
#define CLIP_HACK 1
#define PLOT(X,Y) *pixelPtr = pixel;
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, PF_DITHER_5R6G5B line into an XImage.
*/
#define NAME flat_DITHER_5R6G5B_line
#define SETUP_CODE \
GET_XRB(xrb); \
XMesaContext xmesa = XMESA_CONTEXT(ctx); \
const GLubyte *color = vert1->color;
#define PIXEL_TYPE GLushort
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR2(xrb, X, Y)
#define CLIP_HACK 1
#define PLOT(X,Y) PACK_TRUEDITHER( *pixelPtr, X, Y, color[0], color[1], color[2] );
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, PF_DITHER 8-bit line into an XImage.
*/
#define NAME flat_DITHER8_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color; \
GLint r = color[0], g = color[1], b = color[2]; \
DITHER_SETUP;
#define PIXEL_TYPE GLubyte
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR1(xrb, X, Y)
#define CLIP_HACK 1
#define PLOT(X,Y) *pixelPtr = DITHER(X,Y,r,g,b);
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, PF_LOOKUP 8-bit line into an XImage.
*/
#define NAME flat_LOOKUP8_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color; \
GLubyte pixel; \
LOOKUP_SETUP; \
pixel = (GLubyte) LOOKUP( color[0], color[1], color[2] );
#define PIXEL_TYPE GLubyte
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR1(xrb, X,Y)
#define CLIP_HACK 1
#define PLOT(X,Y) *pixelPtr = pixel;
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, PF_HPCR line into an XImage.
*/
#define NAME flat_HPCR_line
#define SETUP_CODE \
GET_XRB(xrb); \
XMesaContext xmesa = XMESA_CONTEXT(ctx); \
const GLubyte *color = vert1->color; \
GLint r = color[0], g = color[1], b = color[2];
#define PIXEL_TYPE GLubyte
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR1(xrb, X,Y)
#define CLIP_HACK 1
#define PLOT(X,Y) *pixelPtr = (GLubyte) DITHER_HPCR(X,Y,r,g,b);
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, Z-less, PF_TRUECOLOR line into an XImage.
*/
#define NAME flat_TRUECOLOR_z_line
#define SETUP_CODE \
GET_XRB(xrb); \
XMesaContext xmesa = XMESA_CONTEXT(ctx); \
const GLubyte *color = vert1->color; \
unsigned long pixel; \
PACK_TRUECOLOR( pixel, color[0], color[1], color[2] );
#define INTERP_Z 1
#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
#define CLIP_HACK 1
#define PLOT(X,Y) \
if (Z < *zPtr) { \
*zPtr = Z; \
XMesaPutPixel(xrb->ximage, X, YFLIP(xrb, Y), pixel); \
}
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, Z-less, PF_8A8B8G8R line into an XImage.
*/
#define NAME flat_8A8B8G8R_z_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color; \
GLuint pixel = PACK_8B8G8R( color[0], color[1], color[2] );
#define INTERP_Z 1
#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
#define PIXEL_TYPE GLuint
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR4(xrb, X,Y)
#define CLIP_HACK 1
#define PLOT(X,Y) \
if (Z < *zPtr) { \
*zPtr = Z; \
*pixelPtr = pixel; \
}
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, Z-less, PF_8A8R8G8B line into an XImage.
*/
#define NAME flat_8A8R8G8B_z_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color; \
GLuint pixel = PACK_8R8G8B( color[0], color[1], color[2] );
#define INTERP_Z 1
#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
#define PIXEL_TYPE GLuint
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR4(xrb, X,Y)
#define CLIP_HACK 1
#define PLOT(X,Y) \
if (Z < *zPtr) { \
*zPtr = Z; \
*pixelPtr = pixel; \
}
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, Z-less, PF_8R8G8B line into an XImage.
*/
#define NAME flat_8R8G8B_z_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color; \
GLuint pixel = PACK_8R8G8B( color[0], color[1], color[2] );
#define INTERP_Z 1
#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
#define PIXEL_TYPE GLuint
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR4(xrb, X,Y)
#define CLIP_HACK 1
#define PLOT(X,Y) \
if (Z < *zPtr) { \
*zPtr = Z; \
*pixelPtr = pixel; \
}
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, Z-less, PF_8R8G8B24 line into an XImage.
*/
#define NAME flat_8R8G8B24_z_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color;
#define INTERP_Z 1
#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
#define PIXEL_TYPE bgr_t
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR3(xrb, X,Y)
#define CLIP_HACK 1
#define PLOT(X,Y) \
if (Z < *zPtr) { \
*zPtr = Z; \
pixelPtr->r = color[RCOMP]; \
pixelPtr->g = color[GCOMP]; \
pixelPtr->b = color[BCOMP]; \
}
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, Z-less, PF_5R6G5B line into an XImage.
*/
#define NAME flat_5R6G5B_z_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color; \
GLushort pixel = PACK_5R6G5B( color[0], color[1], color[2] );
#define INTERP_Z 1
#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
#define PIXEL_TYPE GLushort
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR2(xrb, X,Y)
#define CLIP_HACK 1
#define PLOT(X,Y) \
if (Z < *zPtr) { \
*zPtr = Z; \
*pixelPtr = pixel; \
}
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, Z-less, PF_DITHER_5R6G5B line into an XImage.
*/
#define NAME flat_DITHER_5R6G5B_z_line
#define SETUP_CODE \
GET_XRB(xrb); \
XMesaContext xmesa = XMESA_CONTEXT(ctx); \
const GLubyte *color = vert1->color;
#define INTERP_Z 1
#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
#define PIXEL_TYPE GLushort
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR2(xrb, X,Y)
#define CLIP_HACK 1
#define PLOT(X,Y) \
if (Z < *zPtr) { \
*zPtr = Z; \
PACK_TRUEDITHER(*pixelPtr, X, Y, color[0], color[1], color[2]); \
}
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, Z-less, PF_DITHER 8-bit line into an XImage.
*/
#define NAME flat_DITHER8_z_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color; \
GLint r = color[0], g = color[1], b = color[2]; \
DITHER_SETUP;
#define INTERP_Z 1
#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
#define PIXEL_TYPE GLubyte
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR1(xrb, X,Y)
#define CLIP_HACK 1
#define PLOT(X,Y) \
if (Z < *zPtr) { \
*zPtr = Z; \
*pixelPtr = (GLubyte) DITHER( X, Y, r, g, b); \
}
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, Z-less, PF_LOOKUP 8-bit line into an XImage.
*/
#define NAME flat_LOOKUP8_z_line
#define SETUP_CODE \
GET_XRB(xrb); \
const GLubyte *color = vert1->color; \
GLubyte pixel; \
LOOKUP_SETUP; \
pixel = (GLubyte) LOOKUP( color[0], color[1], color[2] );
#define INTERP_Z 1
#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
#define PIXEL_TYPE GLubyte
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR1(xrb, X,Y)
#define CLIP_HACK 1
#define PLOT(X,Y) \
if (Z < *zPtr) { \
*zPtr = Z; \
*pixelPtr = pixel; \
}
#include "swrast/s_linetemp.h"
/*
* Draw a flat-shaded, Z-less, PF_HPCR line into an XImage.
*/
#define NAME flat_HPCR_z_line
#define SETUP_CODE \
GET_XRB(xrb); \
XMesaContext xmesa = XMESA_CONTEXT(ctx); \
const GLubyte *color = vert1->color; \
GLint r = color[0], g = color[1], b = color[2];
#define INTERP_Z 1
#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
#define PIXEL_TYPE GLubyte
#define BYTES_PER_ROW (xrb->ximage->bytes_per_line)
#define PIXEL_ADDRESS(X,Y) PIXEL_ADDR1(xrb, X,Y)
#define CLIP_HACK 1
#define PLOT(X,Y) \
if (Z < *zPtr) { \
*zPtr = Z; \
*pixelPtr = (GLubyte) DITHER_HPCR( X, Y, r, g, b); \
}
#include "swrast/s_linetemp.h"
#ifndef XFree86Server
/**
* Draw fast, XOR line with XDrawLine in front color buffer.
* WARNING: this isn't fully OpenGL conformant because different pixels
* will be hit versus using the other line functions.
* Don't use the code in X server GLcore module since we need a wrapper
* for the XSetLineAttributes() function call.
*/
static void
xor_line(GLcontext *ctx, const SWvertex *vert0, const SWvertex *vert1)
{
XMesaContext xmesa = XMESA_CONTEXT(ctx);
XMesaDisplay *dpy = xmesa->xm_visual->display;
XMesaGC gc = xmesa->xm_buffer->gc;
GET_XRB(xrb);
unsigned long pixel = xmesa_color_to_pixel(ctx,
vert1->color[0], vert1->color[1],
vert1->color[2], vert1->color[3],
xmesa->pixelformat);
int x0 = (int) vert0->win[0];
int y0 = YFLIP(xrb, (GLint) vert0->win[1]);
int x1 = (int) vert1->win[0];
int y1 = YFLIP(xrb, (GLint) vert1->win[1]);
XMesaSetForeground(dpy, gc, pixel);
XMesaSetFunction(dpy, gc, GXxor);
XSetLineAttributes(dpy, gc, (int) ctx->Line.Width,
LineSolid, CapButt, JoinMiter);
XDrawLine(dpy, xrb->pixmap, gc, x0, y0, x1, y1);
XMesaSetFunction(dpy, gc, GXcopy); /* this gc is used elsewhere */
}
#endif /* XFree86Server */
/**
* Return pointer to line drawing function, or NULL if we should use a
* swrast fallback.
*/
static swrast_line_func
get_line_func(GLcontext *ctx)
{
XMesaContext xmesa = XMESA_CONTEXT(ctx);
SWcontext *swrast = SWRAST_CONTEXT(ctx);
int depth = GET_VISUAL_DEPTH(xmesa->xm_visual);
struct xmesa_renderbuffer *xrb;
if ((ctx->DrawBuffer->_ColorDrawBufferMask[0]
& (BUFFER_BIT_FRONT_LEFT | BUFFER_BIT_BACK_LEFT)) == 0)
return (swrast_line_func) NULL;
if (ctx->RenderMode != GL_RENDER) return (swrast_line_func) NULL;
if (ctx->Line.SmoothFlag) return (swrast_line_func) NULL;
if (ctx->Texture._EnabledUnits) return (swrast_line_func) NULL;
if (ctx->Light.ShadeModel != GL_FLAT) return (swrast_line_func) NULL;
if (ctx->Line.StippleFlag) return (swrast_line_func) NULL;
if (swrast->_RasterMask & MULTI_DRAW_BIT) return (swrast_line_func) NULL;
xrb = xmesa_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0][0]->Wrapped);
if (xrb->ximage
&& swrast->_RasterMask==DEPTH_BIT
&& ctx->Depth.Func==GL_LESS
&& ctx->Depth.Mask==GL_TRUE
&& ctx->Visual.depthBits == DEFAULT_SOFTWARE_DEPTH_BITS
&& ctx->Line.Width==1.0F) {
switch (xmesa->pixelformat) {
case PF_Truecolor:
return flat_TRUECOLOR_z_line;
case PF_8A8B8G8R:
return flat_8A8B8G8R_z_line;
case PF_8A8R8G8B:
return flat_8A8R8G8B_z_line;
case PF_8R8G8B:
return flat_8R8G8B_z_line;
case PF_8R8G8B24:
return flat_8R8G8B24_z_line;
case PF_5R6G5B:
return flat_5R6G5B_z_line;
case PF_Dither_5R6G5B:
return flat_DITHER_5R6G5B_z_line;
case PF_Dither:
return (depth==8) ? flat_DITHER8_z_line : (swrast_line_func) NULL;
case PF_Lookup:
return (depth==8) ? flat_LOOKUP8_z_line : (swrast_line_func) NULL;
case PF_HPCR:
return flat_HPCR_z_line;
default:
return (swrast_line_func)NULL;
}
}
if (xrb->ximage
&& swrast->_RasterMask==0
&& ctx->Line.Width==1.0F) {
switch (xmesa->pixelformat) {
case PF_Truecolor:
return flat_TRUECOLOR_line;
case PF_8A8B8G8R:
return flat_8A8B8G8R_line;
case PF_8A8R8G8B:
return flat_8A8R8G8B_line;
case PF_8R8G8B:
return flat_8R8G8B_line;
case PF_8R8G8B24:
return flat_8R8G8B24_line;
case PF_5R6G5B:
return flat_5R6G5B_line;
case PF_Dither_5R6G5B:
return flat_DITHER_5R6G5B_line;
case PF_Dither:
return (depth==8) ? flat_DITHER8_line : (swrast_line_func) NULL;
case PF_Lookup:
return (depth==8) ? flat_LOOKUP8_line : (swrast_line_func) NULL;
case PF_HPCR:
return flat_HPCR_line;
default:
return (swrast_line_func)NULL;
}
}
#ifndef XFree86Server
if (ctx->DrawBuffer->_NumColorDrawBuffers[0] == 1
&& ctx->DrawBuffer->_ColorDrawBufferMask[0] == BUFFER_BIT_FRONT_LEFT
&& swrast->_RasterMask == LOGIC_OP_BIT
&& ctx->Color.LogicOp == GL_XOR
&& !ctx->Line.StippleFlag
&& !ctx->Line.SmoothFlag) {
return xor_line;
}
#endif /* XFree86Server */
return (swrast_line_func) NULL;
}
/**
* Override for the swrast line-selection function. Try to use one
* of our internal line functions, otherwise fall back to the
* standard swrast functions.
*/
void
xmesa_choose_line(GLcontext *ctx)
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
if (!(swrast->Line = get_line_func( ctx )))
_swrast_choose_line( ctx );
}
|
