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Move the transform and lighting code to two new directories
[mesa.git] / src / mesa / drivers / x11 / xm_api.c
1 /* $Id: xm_api.c,v 1.8 2000/11/16 21:05:40 keithw Exp $ */
2
3 /*
4 * Mesa 3-D graphics library
5 * Version: 3.3
6 *
7 * Copyright (C) 1999-2000 Brian Paul All Rights Reserved.
8 *
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice shall be included
17 * in all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
23 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
24 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 */
26
27
28 /*
29 * This file contains the implementations of all the XMesa* functions.
30 *
31 *
32 * NOTES:
33 *
34 * The window coordinate system origin (0,0) is in the lower-left corner
35 * of the window. X11's window coordinate origin is in the upper-left
36 * corner of the window. Therefore, most drawing functions in this
37 * file have to flip Y coordinates.
38 *
39 * Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile
40 * in support for the MIT Shared Memory extension. If enabled, when you
41 * use an Ximage for the back buffer in double buffered mode, the "swap"
42 * operation will be faster. You must also link with -lXext.
43 *
44 * Byte swapping: If the Mesa host and the X display use a different
45 * byte order then there's some trickiness to be aware of when using
46 * XImages. The byte ordering used for the XImage is that of the X
47 * display, not the Mesa host.
48 * The color-to-pixel encoding for True/DirectColor must be done
49 * according to the display's visual red_mask, green_mask, and blue_mask.
50 * If XPutPixel is used to put a pixel into an XImage then XPutPixel will
51 * do byte swapping if needed. If one wants to directly "poke" the pixel
52 * into the XImage's buffer then the pixel must be byte swapped first. In
53 * Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format
54 * and use XPutPixel everywhere except in the implementation of
55 * glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so
56 * instead of using XPutPixel we "poke" our values after byte-swapping
57 * the clear pixel value if needed.
58 *
59 */
60
61 #ifdef __CYGWIN__
62 #undef WIN32
63 #undef __WIN32__
64 #endif
65
66 #include "glxheader.h"
67 #include "GL/xmesa.h"
68 #include "xmesaP.h"
69 #include "context.h"
70 #include "extensions.h"
71 #include "glthread.h"
72 #include "matrix.h"
73 #include "mem.h"
74 #include "types.h"
75 #ifdef HAVE_CONFIG_H
76 #include "conf.h"
77 #endif
78 #include "macros.h"
79 #include "swrast/swrast.h"
80 #include "swrast_setup/swrast_setup.h"
81 #include "tnl/tnl.h"
82
83 #ifndef GLX_NONE_EXT
84 #define GLX_NONE_EXT 0x8000
85 #endif
86
87
88 /*
89 * Global X driver lock
90 */
91 _glthread_Mutex _xmesa_lock;
92
93
94
95 /*
96 * Lookup tables for HPCR pixel format:
97 */
98 static short hpcr_rgbTbl[3][256] = {
99 {
100 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23,
101 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31,
102 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
103 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
104 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
105 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
106 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
107 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
108 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
109 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
110 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
111 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
112 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
113 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
114 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
115 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239
116 },
117 {
118 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23,
119 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31,
120 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
121 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
122 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
123 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
124 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
125 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
126 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
127 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
128 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
129 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
130 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
131 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
132 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
133 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239
134 },
135 {
136 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
137 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47,
138 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55,
139 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63,
140 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71,
141 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79,
142 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87,
143 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
144 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
145 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
146 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
147 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
148 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
149 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
150 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
151 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223
152 }
153 };
154
155
156
157 /**********************************************************************/
158 /***** X Utility Functions *****/
159 /**********************************************************************/
160
161
162 /*
163 * X/Mesa error reporting function:
164 */
165 static void error( const char *msg )
166 {
167 if (getenv("MESA_DEBUG"))
168 fprintf( stderr, "X/Mesa error: %s\n", msg );
169 }
170
171
172 /*
173 * Return the host's byte order as LSBFirst or MSBFirst ala X.
174 */
175 #ifndef XFree86Server
176 static int host_byte_order( void )
177 {
178 int i = 1;
179 char *cptr = (char *) &i;
180 return (*cptr==1) ? LSBFirst : MSBFirst;
181 }
182 #endif
183
184
185 /*
186 * Error handling.
187 */
188 #ifndef XFree86Server
189 static int mesaXErrorFlag = 0;
190
191 static int mesaHandleXError( XMesaDisplay *dpy, XErrorEvent *event )
192 {
193 (void) dpy;
194 (void) event;
195 mesaXErrorFlag = 1;
196 return 0;
197 }
198 #endif
199
200
201 /*
202 * Check if the X Shared Memory extension is available.
203 * Return: 0 = not available
204 * 1 = shared XImage support available
205 * 2 = shared Pixmap support available also
206 */
207 #ifndef XFree86Server
208 static int check_for_xshm( XMesaDisplay *display )
209 {
210 #ifdef USE_XSHM
211 int major, minor, ignore;
212 Bool pixmaps;
213
214 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) {
215 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) {
216 return (pixmaps==True) ? 2 : 1;
217 }
218 else {
219 return 0;
220 }
221 }
222 else {
223 return 0;
224 }
225 #else
226 /* Can't compile XSHM support */
227 return 0;
228 #endif
229 }
230 #endif
231
232
233 /*
234 * Return the width and height of the given drawable.
235 */
236 static void get_drawable_size( XMesaDisplay *dpy, XMesaDrawable d,
237 unsigned int *width, unsigned int *height)
238 {
239 #ifdef XFree86Server
240 (void) dpy;
241 *width = d->width;
242 *height = d->height;
243 #else
244 Window root;
245 int x, y;
246 unsigned int bw, depth;
247
248 _glthread_LOCK_MUTEX(_xmesa_lock);
249 XGetGeometry( dpy, d, &root, &x, &y, width, height, &bw, &depth );
250 _glthread_UNLOCK_MUTEX(_xmesa_lock);
251 #endif
252 }
253
254
255 /*
256 * Apply gamma correction to an intensity value in [0..max]. Return the
257 * new intensity value.
258 */
259 static GLint gamma_adjust( GLfloat gamma, GLint value, GLint max )
260 {
261 if (gamma == 1.0) {
262 return value;
263 }
264 else {
265 double x = (double) value / (double) max;
266 return (GLint) ((GLfloat) max * pow( x, 1.0F/gamma ) + 0.5F);
267 }
268 }
269
270
271
272 /*
273 * Return the true number of bits per pixel for XImages.
274 * For example, if we request a 24-bit deep visual we may actually need/get
275 * 32bpp XImages. This function returns the appropriate bpp.
276 * Input: dpy - the X display
277 * visinfo - desribes the visual to be used for XImages
278 * Return: true number of bits per pixel for XImages
279 */
280 #define GET_BITS_PER_PIXEL(xmv) bits_per_pixel(xmv)
281
282 #ifdef XFree86Server
283
284 static int bits_per_pixel( XMesaVisual xmv )
285 {
286 XMesaVisualInfo visinfo = xmv->visinfo;
287 const int depth = visinfo->nplanes;
288 int i;
289 for (i = 0; i < screenInfo.numPixmapFormats; i++) {
290 if (screenInfo.formats[i].depth == depth)
291 return screenInfo.formats[i].bitsPerPixel;
292 }
293 return depth; /* should never get here, but this should be safe */
294 }
295
296 #else
297
298 static int bits_per_pixel( XMesaVisual xmv )
299 {
300 XMesaDisplay *dpy = xmv->display;
301 XMesaVisualInfo visinfo = xmv->visinfo;
302 XMesaImage *img;
303 int bitsPerPixel;
304 /* Create a temporary XImage */
305 img = XCreateImage( dpy, visinfo->visual, visinfo->depth,
306 ZPixmap, 0, /*format, offset*/
307 (char*) MALLOC(8), /*data*/
308 1, 1, /*width, height*/
309 32, /*bitmap_pad*/
310 0 /*bytes_per_line*/
311 );
312 assert(img);
313 /* grab the bits/pixel value */
314 bitsPerPixel = img->bits_per_pixel;
315 /* free the XImage */
316 FREE( img->data );
317 img->data = NULL;
318 XMesaDestroyImage( img );
319 return bitsPerPixel;
320 }
321 #endif
322
323
324
325 /*
326 * Determine if a given X window ID is valid (window exists).
327 * Do this by calling XGetWindowAttributes() for the window and
328 * checking if we catch an X error.
329 * Input: dpy - the display
330 * win - the window to check for existance
331 * Return: GL_TRUE - window exists
332 * GL_FALSE - window doesn't exist
333 */
334 #ifndef XFree86Server
335 static GLboolean WindowExistsFlag;
336
337 static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr )
338 {
339 (void) dpy;
340 if (xerr->error_code == BadWindow) {
341 WindowExistsFlag = GL_FALSE;
342 }
343 return 0;
344 }
345
346 static GLboolean window_exists( XMesaDisplay *dpy, Window win )
347 {
348 XWindowAttributes wa;
349 int (*old_handler)( XMesaDisplay*, XErrorEvent* );
350 WindowExistsFlag = GL_TRUE;
351 old_handler = XSetErrorHandler(window_exists_err_handler);
352 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */
353 XSetErrorHandler(old_handler);
354 return WindowExistsFlag;
355 }
356 #endif
357
358
359
360 /**********************************************************************/
361 /***** Linked list of XMesaBuffers *****/
362 /**********************************************************************/
363
364 static XMesaBuffer XMesaBufferList = NULL;
365
366
367 /* Allocate a new XMesaBuffer, add to linked list */
368 static XMesaBuffer alloc_xmesa_buffer(void)
369 {
370 XMesaBuffer b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer);
371 if (b) {
372 b->Next = XMesaBufferList;
373 XMesaBufferList = b;
374 }
375 return b;
376 }
377
378
379 /*
380 * Find an XMesaBuffer by matching X display and colormap but NOT matching
381 * the notThis buffer.
382 */
383 static XMesaBuffer find_xmesa_buffer(XMesaDisplay *dpy,
384 XMesaColormap cmap,
385 XMesaBuffer notThis)
386 {
387 XMesaBuffer b;
388 for (b=XMesaBufferList; b; b=b->Next) {
389 if (b->display==dpy && b->cmap==cmap && b!=notThis) {
390 return b;
391 }
392 }
393 return NULL;
394 }
395
396
397 /*
398 * Free an XMesaBuffer, remove from linked list, perhaps free X colormap
399 * entries.
400 */
401 static void free_xmesa_buffer(int client, XMesaBuffer buffer)
402 {
403 XMesaBuffer prev = NULL, b;
404 (void) client;
405 for (b=XMesaBufferList; b; b=b->Next) {
406 if (b==buffer) {
407 /* unlink bufer from list */
408 if (prev)
409 prev->Next = buffer->Next;
410 else
411 XMesaBufferList = buffer->Next;
412 /* Check to free X colors */
413 if (buffer->num_alloced>0) {
414 /* If no other buffer uses this X colormap then free the colors. */
415 if (!find_xmesa_buffer(buffer->display, buffer->cmap, buffer)) {
416 #ifdef XFree86Server
417 (void)FreeColors(buffer->cmap, client,
418 buffer->num_alloced, buffer->alloced_colors,
419 0);
420 #else
421 XFreeColors(buffer->display, buffer->cmap,
422 buffer->alloced_colors, buffer->num_alloced, 0);
423 #endif
424 }
425 }
426 FREE(buffer);
427 return;
428 }
429 /* continue search */
430 prev = b;
431 }
432 /* buffer not found in XMesaBufferList */
433 gl_problem(NULL,"free_xmesa_buffer() - buffer not found\n");
434 }
435
436
437 /* Copy X color table stuff from one XMesaBuffer to another. */
438 static void copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src)
439 {
440 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table));
441 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r));
442 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g));
443 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b));
444 dst->num_alloced = src->num_alloced;
445 MEMCPY(dst->alloced_colors, src->alloced_colors,
446 sizeof(src->alloced_colors));
447 }
448
449
450
451 /**********************************************************************/
452 /***** Misc Private Functions *****/
453 /**********************************************************************/
454
455
456 /*
457 * Return number of bits set in n.
458 */
459 static int bitcount( unsigned long n )
460 {
461 int bits;
462 for (bits=0; n>0; n=n>>1) {
463 if (n&1) {
464 bits++;
465 }
466 }
467 return bits;
468 }
469
470
471
472 /*
473 * Allocate a shared memory XImage back buffer for the given XMesaBuffer.
474 * Return: GL_TRUE if success, GL_FALSE if error
475 */
476 #ifndef XFree86Server
477 static GLboolean alloc_shm_back_buffer( XMesaBuffer b )
478 {
479 #ifdef USE_XSHM
480 /*
481 * We have to do a _lot_ of error checking here to be sure we can
482 * really use the XSHM extension. It seems different servers trigger
483 * errors at different points if the extension won't work. Therefore
484 * we have to be very careful...
485 */
486 GC gc;
487 int (*old_handler)( XMesaDisplay *, XErrorEvent * );
488
489 b->backimage = XShmCreateImage( b->xm_visual->display,
490 b->xm_visual->visinfo->visual,
491 b->xm_visual->visinfo->depth,
492 ZPixmap, NULL, &b->shminfo,
493 b->width, b->height );
494 if (b->backimage == NULL) {
495 error("alloc_back_buffer: Shared memory error (XShmCreateImage), disabling.");
496 b->shm = 0;
497 return GL_FALSE;
498 }
499
500 b->shminfo.shmid = shmget( IPC_PRIVATE, b->backimage->bytes_per_line
501 * b->backimage->height, IPC_CREAT|0777 );
502 if (b->shminfo.shmid < 0) {
503 if (getenv("MESA_DEBUG"))
504 perror("alloc_back_buffer");
505 XDestroyImage( b->backimage );
506 b->backimage = NULL;
507 error("alloc_back_buffer: Shared memory error (shmget), disabling.");
508 b->shm = 0;
509 return GL_FALSE;
510 }
511
512 b->shminfo.shmaddr = b->backimage->data
513 = (char*)shmat( b->shminfo.shmid, 0, 0 );
514 if (b->shminfo.shmaddr == (char *) -1) {
515 if (getenv("MESA_DEBUG"))
516 perror("alloc_back_buffer");
517 XDestroyImage( b->backimage );
518 shmctl( b->shminfo.shmid, IPC_RMID, 0 );
519 b->backimage = NULL;
520 error("alloc_back_buffer: Shared memory error (shmat), disabling.");
521 b->shm = 0;
522 return GL_FALSE;
523 }
524
525 b->shminfo.readOnly = False;
526 mesaXErrorFlag = 0;
527 old_handler = XSetErrorHandler( mesaHandleXError );
528 /* This may trigger the X protocol error we're ready to catch: */
529 XShmAttach( b->xm_visual->display, &b->shminfo );
530 XSync( b->xm_visual->display, False );
531
532 if (mesaXErrorFlag) {
533 /* we are on a remote display, this error is normal, don't print it */
534 XFlush( b->xm_visual->display );
535 mesaXErrorFlag = 0;
536 XDestroyImage( b->backimage );
537 shmdt( b->shminfo.shmaddr );
538 shmctl( b->shminfo.shmid, IPC_RMID, 0 );
539 b->backimage = NULL;
540 b->shm = 0;
541 (void) XSetErrorHandler( old_handler );
542 return GL_FALSE;
543 }
544
545 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); /* nobody else needs it */
546
547 /* Finally, try an XShmPutImage to be really sure the extension works */
548 gc = XCreateGC( b->xm_visual->display, b->frontbuffer, 0, NULL );
549 XShmPutImage( b->xm_visual->display, b->frontbuffer, gc,
550 b->backimage, 0, 0, 0, 0, 1, 1 /*one pixel*/, False );
551 XSync( b->xm_visual->display, False );
552 XFreeGC( b->xm_visual->display, gc );
553 (void) XSetErrorHandler( old_handler );
554 if (mesaXErrorFlag) {
555 XFlush( b->xm_visual->display );
556 mesaXErrorFlag = 0;
557 XDestroyImage( b->backimage );
558 shmdt( b->shminfo.shmaddr );
559 shmctl( b->shminfo.shmid, IPC_RMID, 0 );
560 b->backimage = NULL;
561 b->shm = 0;
562 return GL_FALSE;
563 }
564
565 if (b->backimage) {
566 int height = b->backimage->height;
567 /* Needed by PIXELADDR1 macro */
568 b->ximage_width1 = b->backimage->bytes_per_line;
569 b->ximage_origin1 = (GLubyte *) b->backimage->data
570 + b->ximage_width1 * (height-1);
571 /* Needed by PIXELADDR2 macro */
572 b->ximage_width2 = b->backimage->bytes_per_line / 2;
573 b->ximage_origin2 = (GLushort *) b->backimage->data
574 + b->ximage_width2 * (height-1);
575 /* Needed by PIXELADDR3 macro */
576 b->ximage_width3 = b->backimage->bytes_per_line;
577 b->ximage_origin3 = (GLubyte *) b->backimage->data
578 + b->ximage_width3 * (height-1);
579 /* Needed by PIXELADDR4 macro */
580 b->ximage_width4 = b->backimage->width;
581 b->ximage_origin4 = (GLuint *) b->backimage->data
582 + b->ximage_width4 * (height-1);
583 }
584
585 return GL_TRUE;
586 #else
587 /* Can't compile XSHM support */
588 return GL_FALSE;
589 #endif
590 }
591 #endif
592
593
594
595 /*
596 * Setup an off-screen pixmap or Ximage to use as the back buffer.
597 * Input: b - the X/Mesa buffer
598 */
599 void xmesa_alloc_back_buffer( XMesaBuffer b )
600 {
601 if (b->db_state==BACK_XIMAGE) {
602 /* Deallocate the old backimage, if any */
603 if (b->backimage) {
604 #if defined(USE_XSHM) && !defined(XFree86Server)
605 if (b->shm) {
606 XShmDetach( b->xm_visual->display, &b->shminfo );
607 XDestroyImage( b->backimage );
608 shmdt( b->shminfo.shmaddr );
609 }
610 else
611 #endif
612 XMesaDestroyImage( b->backimage );
613 b->backimage = NULL;
614 }
615
616 /* Allocate new back buffer */
617 #ifdef XFree86Server
618 {
619 /* Allocate a regular XImage for the back buffer. */
620 b->backimage = XMesaCreateImage(b->xm_visual->BitsPerPixel,
621 b->width, b->height, NULL);
622 #else
623 if (b->shm==0
624 || alloc_shm_back_buffer(b)==GL_FALSE
625 ) {
626 /* Allocate a regular XImage for the back buffer. */
627 b->backimage = XCreateImage( b->xm_visual->display,
628 b->xm_visual->visinfo->visual,
629 GET_VISUAL_DEPTH(b->xm_visual),
630 ZPixmap, 0, /* format, offset */
631 NULL, b->width, b->height,
632 8, 0 ); /* pad, bytes_per_line */
633 #endif
634 if (!b->backimage) {
635 error("alloc_back_buffer: XCreateImage failed.");
636 }
637 b->backimage->data = (char *) MALLOC( b->backimage->height
638 * b->backimage->bytes_per_line );
639 if (!b->backimage->data) {
640 error("alloc_back_buffer: MALLOC failed.");
641 XMesaDestroyImage( b->backimage );
642 b->backimage = NULL;
643 }
644 }
645 b->backpixmap = None;
646 }
647 else if (b->db_state==BACK_PIXMAP) {
648 XMesaPixmap old_pixmap = b->backpixmap;
649 /* Free the old back pixmap */
650 if (b->backpixmap) {
651 XMesaFreePixmap( b->xm_visual->display, b->backpixmap );
652 }
653 /* Allocate new back pixmap */
654 b->backpixmap = XMesaCreatePixmap( b->xm_visual->display, b->frontbuffer,
655 b->width, b->height,
656 GET_VISUAL_DEPTH(b->xm_visual) );
657 b->backimage = NULL;
658 /* update other references to backpixmap */
659 if (b->buffer==(XMesaDrawable)old_pixmap) {
660 b->buffer = (XMesaDrawable)b->backpixmap;
661 }
662 }
663 }
664
665
666
667 /*
668 * A replacement for XAllocColor. This function should never
669 * fail to allocate a color. When XAllocColor fails, we return
670 * the nearest matching color. If we have to allocate many colors
671 * this function isn't too efficient; the XQueryColors() could be
672 * done just once.
673 * Written by Michael Pichler, Brian Paul, Mark Kilgard
674 * Input: dpy - X display
675 * cmap - X colormap
676 * cmapSize - size of colormap
677 * In/Out: color - the XColor struct
678 * Output: exact - 1=exact color match, 0=closest match
679 * alloced - 1=XAlloc worked, 0=XAlloc failed
680 */
681 static void
682 noFaultXAllocColor( int client,
683 XMesaDisplay *dpy,
684 XMesaColormap cmap,
685 int cmapSize,
686 XMesaColor *color,
687 int *exact, int *alloced )
688 {
689 #ifdef XFree86Server
690 Pixel *ppixIn;
691 xrgb *ctable;
692 #else
693 /* we'll try to cache ctable for better remote display performance */
694 static Display *prevDisplay = NULL;
695 static XMesaColormap prevCmap = 0;
696 static int prevCmapSize = 0;
697 static XMesaColor *ctable = NULL;
698 #endif
699 XMesaColor subColor;
700 int i, bestmatch;
701 double mindist; /* 3*2^16^2 exceeds long int precision. */
702
703 (void) client;
704
705 /* First try just using XAllocColor. */
706 #ifdef XFree86Server
707 if (AllocColor(cmap,
708 &color->red, &color->green, &color->blue,
709 &color->pixel,
710 client) == Success) {
711 #else
712 if (XAllocColor(dpy, cmap, color)) {
713 #endif
714 *exact = 1;
715 *alloced = 1;
716 return;
717 }
718
719 /* Alloc failed, search for closest match */
720
721 /* Retrieve color table entries. */
722 /* XXX alloca candidate. */
723 #ifdef XFree86Server
724 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel));
725 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb));
726 for (i = 0; i < cmapSize; i++) {
727 ppixIn[i] = i;
728 }
729 QueryColors(cmap, cmapSize, ppixIn, ctable);
730 #else
731 if (prevDisplay != dpy || prevCmap != cmap
732 || prevCmapSize != cmapSize || !ctable) {
733 /* free previously cached color table */
734 if (ctable)
735 FREE(ctable);
736 /* Get the color table from X */
737 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor));
738 assert(ctable);
739 for (i = 0; i < cmapSize; i++) {
740 ctable[i].pixel = i;
741 }
742 XQueryColors(dpy, cmap, ctable, cmapSize);
743 prevDisplay = dpy;
744 prevCmap = cmap;
745 prevCmapSize = cmapSize;
746 }
747 #endif
748
749 /* Find best match. */
750 bestmatch = -1;
751 mindist = 0.0;
752 for (i = 0; i < cmapSize; i++) {
753 double dr = 0.30 * ((double) color->red - (double) ctable[i].red);
754 double dg = 0.59 * ((double) color->green - (double) ctable[i].green);
755 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue);
756 double dist = dr * dr + dg * dg + db * db;
757 if (bestmatch < 0 || dist < mindist) {
758 bestmatch = i;
759 mindist = dist;
760 }
761 }
762
763 /* Return result. */
764 subColor.red = ctable[bestmatch].red;
765 subColor.green = ctable[bestmatch].green;
766 subColor.blue = ctable[bestmatch].blue;
767 /* Try to allocate the closest match color. This should only
768 * fail if the cell is read/write. Otherwise, we're incrementing
769 * the cell's reference count.
770 */
771 #ifdef XFree86Server
772 if (AllocColor(cmap,
773 &subColor.red, &subColor.green, &subColor.blue,
774 &subColor.pixel,
775 client) == Success) {
776 #else
777 if (XAllocColor(dpy, cmap, &subColor)) {
778 #endif
779 *alloced = 1;
780 }
781 else {
782 /* do this to work around a problem reported by Frank Ortega */
783 subColor.pixel = (unsigned long) bestmatch;
784 subColor.red = ctable[bestmatch].red;
785 subColor.green = ctable[bestmatch].green;
786 subColor.blue = ctable[bestmatch].blue;
787 subColor.flags = DoRed | DoGreen | DoBlue;
788 *alloced = 0;
789 }
790 #ifdef XFree86Server
791 FREE(ppixIn);
792 FREE(ctable);
793 #else
794 /* don't free table, save it for next time */
795 #endif
796
797 *color = subColor;
798 *exact = 0;
799 }
800
801
802
803
804 /*
805 * Do setup for PF_GRAYSCALE pixel format.
806 * Note that buffer may be NULL.
807 */
808 static GLboolean setup_grayscale( int client, XMesaVisual v,
809 XMesaBuffer buffer, XMesaColormap cmap )
810 {
811 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) {
812 return GL_FALSE;
813 }
814
815 if (buffer) {
816 XMesaBuffer prevBuffer;
817
818 if (!cmap) {
819 return GL_FALSE;
820 }
821
822 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer);
823 if (prevBuffer &&
824 (buffer->xm_visual->gl_visual->RGBAflag ==
825 prevBuffer->xm_visual->gl_visual->RGBAflag)) {
826 /* Copy colormap stuff from previous XMesaBuffer which uses same
827 * X colormap. Do this to avoid time spent in noFaultXAllocColor.
828 */
829 copy_colortable_info(buffer, prevBuffer);
830 }
831 else {
832 /* Allocate 256 shades of gray */
833 int gray;
834 int colorsfailed = 0;
835 for (gray=0;gray<256;gray++) {
836 GLint r = gamma_adjust( v->RedGamma, gray, 255 );
837 GLint g = gamma_adjust( v->GreenGamma, gray, 255 );
838 GLint b = gamma_adjust( v->BlueGamma, gray, 255 );
839 int exact, alloced;
840 XMesaColor xcol;
841 xcol.red = (r << 8) | r;
842 xcol.green = (g << 8) | g;
843 xcol.blue = (b << 8) | b;
844 noFaultXAllocColor( client, v->display,
845 cmap, GET_COLORMAP_SIZE(v),
846 &xcol, &exact, &alloced );
847 if (!exact) {
848 colorsfailed++;
849 }
850 if (alloced) {
851 assert(buffer->num_alloced<256);
852 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel;
853 buffer->num_alloced++;
854 }
855
856 /*OLD
857 assert(gray < 576);
858 buffer->color_table[gray*3+0] = xcol.pixel;
859 buffer->color_table[gray*3+1] = xcol.pixel;
860 buffer->color_table[gray*3+2] = xcol.pixel;
861 assert(xcol.pixel < 65536);
862 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100;
863 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100;
864 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100;
865 */
866 buffer->color_table[gray] = xcol.pixel;
867 assert(xcol.pixel < 65536);
868 buffer->pixel_to_r[xcol.pixel] = gray;
869 buffer->pixel_to_g[xcol.pixel] = gray;
870 buffer->pixel_to_b[xcol.pixel] = gray;
871 }
872
873 if (colorsfailed && getenv("MESA_DEBUG")) {
874 fprintf( stderr,
875 "Note: %d out of 256 needed colors do not match exactly.\n",
876 colorsfailed );
877 }
878 }
879 }
880
881 v->dithered_pf = PF_GRAYSCALE;
882 v->undithered_pf = PF_GRAYSCALE;
883 return GL_TRUE;
884 }
885
886
887
888 /*
889 * Setup RGB rendering for a window with a PseudoColor, StaticColor,
890 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225
891 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB
892 * color. While this function was originally designed just for 8-bit
893 * visuals, it has also proven to work from 4-bit up to 16-bit visuals.
894 * Dithering code contributed by Bob Mercier.
895 */
896 static GLboolean setup_dithered_color( int client, XMesaVisual v,
897 XMesaBuffer buffer, XMesaColormap cmap )
898 {
899 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) {
900 return GL_FALSE;
901 }
902
903 if (buffer) {
904 XMesaBuffer prevBuffer;
905
906 if (!cmap) {
907 return GL_FALSE;
908 }
909
910 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer);
911 if (prevBuffer &&
912 (buffer->xm_visual->gl_visual->RGBAflag ==
913 prevBuffer->xm_visual->gl_visual->RGBAflag)) {
914 /* Copy colormap stuff from previous, matching XMesaBuffer.
915 * Do this to avoid time spent in noFaultXAllocColor.
916 */
917 copy_colortable_info(buffer, prevBuffer);
918 }
919 else {
920 /* Allocate X colors and initialize color_table[], red_table[], etc */
921 int r, g, b, i;
922 int colorsfailed = 0;
923 for (r = 0; r < _R; r++) {
924 for (g = 0; g < _G; g++) {
925 for (b = 0; b < _B; b++) {
926 XMesaColor xcol;
927 int exact, alloced;
928 xcol.red =gamma_adjust(v->RedGamma, r*65535/(_R-1),65535);
929 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(_G-1),65535);
930 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(_B-1),65535);
931 noFaultXAllocColor( client, v->display,
932 cmap, GET_COLORMAP_SIZE(v),
933 &xcol, &exact, &alloced );
934 if (!exact) {
935 colorsfailed++;
936 }
937 if (alloced) {
938 assert(buffer->num_alloced<256);
939 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel;
940 buffer->num_alloced++;
941 }
942 i = _MIX( r, g, b );
943 assert(i < 576);
944 buffer->color_table[i] = xcol.pixel;
945 assert(xcol.pixel < 65536);
946 buffer->pixel_to_r[xcol.pixel] = r * 255 / (_R-1);
947 buffer->pixel_to_g[xcol.pixel] = g * 255 / (_G-1);
948 buffer->pixel_to_b[xcol.pixel] = b * 255 / (_B-1);
949 }
950 }
951 }
952
953 if (colorsfailed && getenv("MESA_DEBUG")) {
954 fprintf( stderr,
955 "Note: %d out of %d needed colors do not match exactly.\n",
956 colorsfailed, _R*_G*_B );
957 }
958 }
959 }
960
961 v->dithered_pf = PF_DITHER;
962 v->undithered_pf = PF_LOOKUP;
963 return GL_TRUE;
964 }
965
966
967 /*
968 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode.
969 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer.
970 * Special dithering tables have to be initialized.
971 */
972 static void setup_8bit_hpcr( XMesaVisual v )
973 {
974 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be)
975 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined
976 * on the root window AND the colormap obtainable by XGetRGBColormaps
977 * for that atom must be set on the window. (see also tkInitWindow)
978 * If that colormap is not set, the output will look stripy.
979 */
980
981 /* Setup color tables with gamma correction */
982 int i;
983 double g;
984
985 g = 1.0 / v->RedGamma;
986 for (i=0; i<256; i++) {
987 GLint red = (GLint) (255.0 * pow( hpcr_rgbTbl[0][i]/255.0, g ) + 0.5);
988 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 );
989 }
990
991 g = 1.0 / v->GreenGamma;
992 for (i=0; i<256; i++) {
993 GLint green = (GLint) (255.0 * pow( hpcr_rgbTbl[1][i]/255.0, g ) + 0.5);
994 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 );
995 }
996
997 g = 1.0 / v->BlueGamma;
998 for (i=0; i<256; i++) {
999 GLint blue = (GLint) (255.0 * pow( hpcr_rgbTbl[2][i]/255.0, g ) + 0.5);
1000 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 );
1001 }
1002 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */
1003 v->dithered_pf = PF_HPCR;
1004
1005 /* which method should I use to clear */
1006 /* GL_FALSE: keep the ordinary method */
1007 /* GL_TRUE : clear with dither pattern */
1008 v->hpcr_clear_flag = getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE;
1009
1010 if (v->hpcr_clear_flag) {
1011 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display,
1012 DefaultRootWindow(v->display),
1013 16, 2, 8);
1014 #ifndef XFree86Server
1015 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap,
1016 0, 0, 16, 2, AllPlanes, ZPixmap);
1017 #endif
1018 }
1019 }
1020
1021
1022 /*
1023 * Setup RGB rendering for a window with a True/DirectColor visual.
1024 */
1025 static void setup_truecolor( XMesaVisual v, XMesaBuffer buffer,
1026 XMesaWindow window, XMesaColormap cmap )
1027 {
1028 unsigned long rmask, gmask, bmask;
1029 (void) buffer;
1030 (void) window;
1031 (void) cmap;
1032
1033 /* Compute red multiplier (mask) and bit shift */
1034 v->rshift = 0;
1035 rmask = GET_REDMASK(v);
1036 while ((rmask & 1)==0) {
1037 v->rshift++;
1038 rmask = rmask >> 1;
1039 }
1040
1041 /* Compute green multiplier (mask) and bit shift */
1042 v->gshift = 0;
1043 gmask = GET_GREENMASK(v);
1044 while ((gmask & 1)==0) {
1045 v->gshift++;
1046 gmask = gmask >> 1;
1047 }
1048
1049 /* Compute blue multiplier (mask) and bit shift */
1050 v->bshift = 0;
1051 bmask = GET_BLUEMASK(v);
1052 while ((bmask & 1)==0) {
1053 v->bshift++;
1054 bmask = bmask >> 1;
1055 }
1056
1057 /*
1058 * Compute component-to-pixel lookup tables and dithering kernel
1059 */
1060 {
1061 static GLubyte kernel[16] = {
1062 0*16, 8*16, 2*16, 10*16,
1063 12*16, 4*16, 14*16, 6*16,
1064 3*16, 11*16, 1*16, 9*16,
1065 15*16, 7*16, 13*16, 5*16,
1066 };
1067 GLint rBits = bitcount(rmask);
1068 GLint gBits = bitcount(gmask);
1069 GLint bBits = bitcount(bmask);
1070 GLint minBits;
1071 GLuint i;
1072
1073 /* convert pixel components in [0,_mask] to RGB values in [0,255] */
1074 for (i=0; i<=rmask; i++)
1075 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask);
1076 for (i=0; i<=gmask; i++)
1077 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask);
1078 for (i=0; i<=bmask; i++)
1079 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask);
1080
1081 /* convert RGB values from [0,255] to pixel components */
1082
1083 for (i=0;i<256;i++) {
1084 GLint r = gamma_adjust(v->RedGamma, i, 255);
1085 GLint g = gamma_adjust(v->GreenGamma, i, 255);
1086 GLint b = gamma_adjust(v->BlueGamma, i, 255);
1087 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift;
1088 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift;
1089 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift;
1090 }
1091 /* overflow protection */
1092 for (i=256;i<512;i++) {
1093 v->RtoPixel[i] = v->RtoPixel[255];
1094 v->GtoPixel[i] = v->GtoPixel[255];
1095 v->BtoPixel[i] = v->BtoPixel[255];
1096 }
1097
1098 /* setup dithering kernel */
1099 minBits = rBits;
1100 if (gBits < minBits) minBits = gBits;
1101 if (bBits < minBits) minBits = bBits;
1102 for (i=0;i<16;i++) {
1103 v->Kernel[i] = kernel[i] >> minBits;
1104 }
1105
1106 v->undithered_pf = PF_TRUECOLOR;
1107 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_TRUEDITHER : PF_TRUECOLOR;
1108 }
1109
1110 /*
1111 * Now check for TrueColor visuals which we can optimize.
1112 */
1113 if ( GET_REDMASK(v) ==0x0000ff
1114 && GET_GREENMASK(v)==0x00ff00
1115 && GET_BLUEMASK(v) ==0xff0000
1116 && CHECK_BYTE_ORDER(v)
1117 && v->BitsPerPixel==32
1118 && sizeof(GLuint)==4
1119 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) {
1120 /* common 32 bpp config used on SGI, Sun */
1121 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R;
1122 }
1123 else if (GET_REDMASK(v) ==0xff0000
1124 && GET_GREENMASK(v)==0x00ff00
1125 && GET_BLUEMASK(v) ==0x0000ff
1126 && CHECK_BYTE_ORDER(v)
1127 && v->BitsPerPixel==32
1128 && sizeof(GLuint)==4
1129 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) {
1130 /* common 32 bpp config used on Linux, HP, IBM */
1131 v->undithered_pf = v->dithered_pf = PF_8R8G8B;
1132 }
1133 else if (GET_REDMASK(v) ==0xff0000
1134 && GET_GREENMASK(v)==0x00ff00
1135 && GET_BLUEMASK(v) ==0x0000ff
1136 && CHECK_BYTE_ORDER(v)
1137 && v->BitsPerPixel==24
1138 && sizeof(GLuint)==4
1139 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) {
1140 /* common packed 24 bpp config used on Linux */
1141 v->undithered_pf = v->dithered_pf = PF_8R8G8B24;
1142 }
1143 else if (GET_REDMASK(v) ==0xf800
1144 && GET_GREENMASK(v)==0x07e0
1145 && GET_BLUEMASK(v) ==0x001f
1146 && CHECK_BYTE_ORDER(v)
1147 && v->BitsPerPixel==16
1148 && sizeof(GLushort)==2
1149 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) {
1150 /* 5-6-5 color weight on common PC VGA boards */
1151 v->undithered_pf = PF_5R6G5B;
1152 v->dithered_pf = PF_DITHER_5R6G5B;
1153 }
1154 else if (GET_REDMASK(v) ==0xe0
1155 && GET_GREENMASK(v)==0x1c
1156 && GET_BLUEMASK(v) ==0x03
1157 && CHECK_FOR_HPCR(v)) {
1158 setup_8bit_hpcr( v );
1159 }
1160 }
1161
1162
1163
1164 /*
1165 * Setup RGB rendering for a window with a monochrome visual.
1166 */
1167 static void setup_monochrome( XMesaVisual v, XMesaBuffer b )
1168 {
1169 (void) b;
1170 v->dithered_pf = v->undithered_pf = PF_1BIT;
1171 /* if black=1 then we must flip pixel values */
1172 v->bitFlip = (GET_BLACK_PIXEL(v) != 0);
1173 }
1174
1175
1176
1177 /*
1178 * When a context is "made current" for the first time, we can finally
1179 * finish initializing the context's visual and buffer information.
1180 * Input: v - the XMesaVisual to initialize
1181 * b - the XMesaBuffer to initialize (may be NULL)
1182 * rgb_flag - TRUE = RGBA mode, FALSE = color index mode
1183 * window - the window/pixmap we're rendering into
1184 * cmap - the colormap associated with the window/pixmap
1185 * Return: GL_TRUE=success, GL_FALSE=failure
1186 */
1187 static GLboolean initialize_visual_and_buffer( int client,
1188 XMesaVisual v,
1189 XMesaBuffer b,
1190 GLboolean rgb_flag,
1191 XMesaDrawable window,
1192 XMesaColormap cmap
1193 )
1194 {
1195 #ifndef XFree86Server
1196 XGCValues gcvalues;
1197 #endif
1198
1199 if (b) {
1200 assert(b->xm_visual == v);
1201 }
1202
1203 /* Save true bits/pixel */
1204 v->BitsPerPixel = GET_BITS_PER_PIXEL(v);
1205 assert(v->BitsPerPixel > 0);
1206
1207
1208 if (rgb_flag==GL_FALSE) {
1209 /* COLOR-INDEXED WINDOW:
1210 * Even if the visual is TrueColor or DirectColor we treat it as
1211 * being color indexed. This is weird but might be useful to someone.
1212 */
1213 v->dithered_pf = v->undithered_pf = PF_INDEX;
1214 v->index_bits = GET_VISUAL_DEPTH(v);
1215 }
1216 else {
1217 /* RGB WINDOW:
1218 * We support RGB rendering into almost any kind of visual.
1219 */
1220 int xclass;
1221 xclass = GET_VISUAL_CLASS(v);
1222 if (xclass==TrueColor || xclass==DirectColor) {
1223 setup_truecolor( v, b, (XMesaWindow)window, cmap );
1224 }
1225 else if (xclass==StaticGray && GET_VISUAL_DEPTH(v)==1) {
1226 setup_monochrome( v, b );
1227 }
1228 else if (xclass==GrayScale || xclass==StaticGray) {
1229 if (!setup_grayscale( client, v, b, cmap )) {
1230 return GL_FALSE;
1231 }
1232 }
1233 else if ((xclass==PseudoColor || xclass==StaticColor)
1234 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) {
1235 if (!setup_dithered_color( client, v, b, cmap )) {
1236 return GL_FALSE;
1237 }
1238 }
1239 else {
1240 error("XMesa: RGB mode rendering not supported in given visual.");
1241 return GL_FALSE;
1242 }
1243 v->index_bits = 0;
1244
1245 if (getenv("MESA_NO_DITHER")) {
1246 v->dithered_pf = v->undithered_pf;
1247 }
1248 }
1249
1250
1251 /*
1252 * If MESA_INFO env var is set print out some debugging info
1253 * which can help Brian figure out what's going on when a user
1254 * reports bugs.
1255 */
1256 if (getenv("MESA_INFO")) {
1257 fprintf(stderr, "X/Mesa visual = %p\n", v);
1258 fprintf(stderr, "X/Mesa dithered pf = %u\n", v->dithered_pf);
1259 fprintf(stderr, "X/Mesa undithered pf = %u\n", v->undithered_pf);
1260 fprintf(stderr, "X/Mesa level = %d\n", v->level);
1261 fprintf(stderr, "X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v));
1262 fprintf(stderr, "X/Mesa bits per pixel = %d\n", v->BitsPerPixel);
1263 }
1264
1265 if (b && window) {
1266 /* Do window-specific initializations */
1267
1268 /* Window dimensions */
1269 unsigned int w, h;
1270 get_drawable_size( v->display, window, &w, &h );
1271 b->width = w;
1272 b->height = h;
1273
1274 b->frontbuffer = window;
1275
1276 assert( v->gl_visual );
1277
1278 /* Setup for single/double buffering */
1279 if (v->gl_visual->DBflag) {
1280 /* Double buffered */
1281 #ifndef XFree86Server
1282 b->shm = check_for_xshm( v->display );
1283 #endif
1284 xmesa_alloc_back_buffer( b );
1285 if (b->db_state==BACK_PIXMAP) {
1286 b->buffer = (XMesaDrawable)b->backpixmap;
1287 }
1288 else {
1289 b->buffer = XIMAGE;
1290 }
1291 }
1292 else {
1293 /* Single Buffered */
1294 b->buffer = b->frontbuffer;
1295 }
1296
1297 /* X11 graphics contexts */
1298 #ifdef XFree86Server
1299 b->gc = CreateScratchGC(v->display, window->depth);
1300 #else
1301 b->gc = XCreateGC( v->display, window, 0, NULL );
1302 #endif
1303 XMesaSetFunction( v->display, b->gc, GXcopy );
1304
1305 /*
1306 * Don't generate Graphics Expose/NoExpose events in swapbuffers().
1307 * Patch contributed by Michael Pichler May 15, 1995.
1308 */
1309 #ifdef XFree86Server
1310 b->cleargc = CreateScratchGC(v->display, window->depth);
1311 {
1312 CARD32 v[1];
1313 v[0] = FALSE;
1314 dixChangeGC(NullClient, b->cleargc, GCGraphicsExposures, v, NULL);
1315 }
1316 #else
1317 gcvalues.graphics_exposures = False;
1318 b->cleargc = XCreateGC( v->display, window,
1319 GCGraphicsExposures, &gcvalues);
1320 #endif
1321 XMesaSetFunction( v->display, b->cleargc, GXcopy );
1322 /*
1323 * Set fill style and tile pixmap once for all for HPCR stuff
1324 * (instead of doing it each time in clear_color_HPCR_pixmap())
1325 * Initialize whole stuff
1326 * Patch contributed by Jacques Leroy March 8, 1998.
1327 */
1328 if (v->hpcr_clear_flag && b->buffer!=XIMAGE) {
1329 int i;
1330 for (i=0; i<16; i++)
1331 {
1332 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0);
1333 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0);
1334 }
1335 XMesaPutImage(b->display, (XMesaDrawable)v->hpcr_clear_pixmap,
1336 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2);
1337 XMesaSetFillStyle( v->display, b->cleargc, FillTiled);
1338 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap );
1339 }
1340
1341 /* Initialize the row buffer XImage for use in write_color_span() */
1342 #ifdef XFree86Server
1343 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1,
1344 (char *)MALLOC(MAX_WIDTH*4));
1345 #else
1346 b->rowimage = XCreateImage( v->display,
1347 v->visinfo->visual,
1348 v->visinfo->depth,
1349 ZPixmap, 0, /*format, offset*/
1350 (char*) MALLOC(MAX_WIDTH*4), /*data*/
1351 MAX_WIDTH, 1, /*width, height*/
1352 32, /*bitmap_pad*/
1353 0 /*bytes_per_line*/ );
1354 #endif
1355 }
1356
1357 return GL_TRUE;
1358 }
1359
1360
1361
1362 /*
1363 * Convert an RGBA color to a pixel value.
1364 */
1365 unsigned long
1366 xmesa_color_to_pixel( XMesaContext xmesa, GLubyte r, GLubyte g, GLubyte b, GLubyte a,
1367 GLuint pixelFormat)
1368 {
1369 switch (pixelFormat) {
1370 case PF_INDEX:
1371 return 0;
1372 case PF_TRUECOLOR:
1373 {
1374 unsigned long p;
1375 PACK_TRUECOLOR( p, r, g, b );
1376 return p;
1377 }
1378 case PF_8A8B8G8R:
1379 return PACK_8A8B8G8R( r, g, b, a );
1380 case PF_8R8G8B:
1381 /* fall through */
1382 case PF_8R8G8B24:
1383 return PACK_8R8G8B( r, g, b );
1384 case PF_5R6G5B:
1385 return PACK_5R6G5B( r, g, b );
1386 case PF_DITHER:
1387 {
1388 DITHER_SETUP;
1389 return DITHER( 1, 0, r, g, b );
1390 }
1391 case PF_1BIT:
1392 /* 382 = (3*255)/2 */
1393 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip;
1394 case PF_HPCR:
1395 return DITHER_HPCR(1, 1, r, g, b);
1396 case PF_LOOKUP:
1397 {
1398 LOOKUP_SETUP;
1399 return LOOKUP( r, g, b );
1400 }
1401 case PF_GRAYSCALE:
1402 return GRAY_RGB( r, g, b );
1403 case PF_TRUEDITHER:
1404 /* fall through */
1405 case PF_DITHER_5R6G5B:
1406 {
1407 unsigned long p;
1408 PACK_TRUEDITHER(p, 1, 0, r, g, b);
1409 return p;
1410 }
1411 default:
1412 gl_problem(NULL, "Bad pixel format in xmesa_color_to_pixel");
1413 }
1414 return 0;
1415 }
1416
1417
1418 /**********************************************************************/
1419 /***** Public Functions *****/
1420 /**********************************************************************/
1421
1422
1423 /*
1424 * Create a new X/Mesa visual.
1425 * Input: display - X11 display
1426 * visinfo - an XVisualInfo pointer
1427 * rgb_flag - GL_TRUE = RGB mode,
1428 * GL_FALSE = color index mode
1429 * alpha_flag - alpha buffer requested?
1430 * db_flag - GL_TRUE = double-buffered,
1431 * GL_FALSE = single buffered
1432 * stereo_flag - stereo visual?
1433 * ximage_flag - GL_TRUE = use an XImage for back buffer,
1434 * GL_FALSE = use an off-screen pixmap for back buffer
1435 * depth_size - requested bits/depth values, or zero
1436 * stencil_size - requested bits/stencil values, or zero
1437 * accum_red_size - requested bits/red accum values, or zero
1438 * accum_green_size - requested bits/green accum values, or zero
1439 * accum_blue_size - requested bits/blue accum values, or zero
1440 * accum_alpha_size - requested bits/alpha accum values, or zero
1441 * num_samples - number of samples/pixel if multisampling, or zero
1442 * level - visual level, usually 0
1443 * visualCaveat - ala the GLX extension, usually GLX_NONE_EXT
1444 * Return; a new XMesaVisual or 0 if error.
1445 */
1446 XMesaVisual XMesaCreateVisual( XMesaDisplay *display,
1447 XMesaVisualInfo visinfo,
1448 GLboolean rgb_flag,
1449 GLboolean alpha_flag,
1450 GLboolean db_flag,
1451 GLboolean stereo_flag,
1452 GLboolean ximage_flag,
1453 GLint depth_size,
1454 GLint stencil_size,
1455 GLint accum_red_size,
1456 GLint accum_green_size,
1457 GLint accum_blue_size,
1458 GLint accum_alpha_size,
1459 GLint num_samples,
1460 GLint level,
1461 GLint visualCaveat )
1462 {
1463 char *gamma;
1464 XMesaVisual v;
1465 GLint red_bits, green_bits, blue_bits, alpha_bits;
1466
1467 /* For debugging only */
1468 if (getenv("MESA_XSYNC")) {
1469 /* This makes debugging X easier.
1470 * In your debugger, set a breakpoint on _XError to stop when an
1471 * X protocol error is generated.
1472 */
1473 #ifdef XFree86Server
1474 /* NOT_NEEDED */
1475 #else
1476 XSynchronize( display, 1 );
1477 #endif
1478 }
1479
1480 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual);
1481 if (!v) {
1482 return NULL;
1483 }
1484
1485 /*
1486 * In the X server, NULL is passed in for the display. It will have
1487 * to be set before using this visual. See XMesaSetVisualDisplay()
1488 * below.
1489 */
1490 v->display = display;
1491
1492 /* Save a copy of the XVisualInfo struct because the user may XFREE()
1493 * the struct but we may need some of the information contained in it
1494 * at a later time.
1495 */
1496 #ifdef XFree86Server
1497 v->visinfo = visinfo;
1498 #else
1499 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo));
1500 if(!v->visinfo) {
1501 FREE(v);
1502 return NULL;
1503 }
1504 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo));
1505
1506 /* Save a copy of the pointer now so we can find this visual again
1507 * if we need to search for it in find_glx_visual().
1508 */
1509 v->vishandle = visinfo;
1510 #endif
1511
1512 #ifdef XFree86Server
1513 /* Initialize the depth of the screen */
1514 {
1515 PixmapFormatRec *format;
1516
1517 for (format = screenInfo.formats;
1518 format->depth != display->rootDepth;
1519 format++)
1520 ;
1521 v->screen_depth = format->bitsPerPixel;
1522 }
1523 #endif
1524
1525 /* check for MESA_GAMMA environment variable */
1526 gamma = getenv("MESA_GAMMA");
1527 if (gamma) {
1528 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0;
1529 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma );
1530 if (v->RedGamma<=0.0) v->RedGamma = 1.0;
1531 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma;
1532 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma;
1533 }
1534 else {
1535 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0;
1536 }
1537
1538 v->ximage_flag = ximage_flag;
1539 v->level = level;
1540 v->VisualCaveat = visualCaveat;
1541
1542 (void) initialize_visual_and_buffer( 0, v, NULL, rgb_flag, 0, 0 );
1543
1544 {
1545 int xclass;
1546 xclass = GET_VISUAL_CLASS(v);
1547 if (xclass==TrueColor || xclass==DirectColor) {
1548 red_bits = bitcount(GET_REDMASK(v));
1549 green_bits = bitcount(GET_GREENMASK(v));
1550 blue_bits = bitcount(GET_BLUEMASK(v));
1551 alpha_bits = 0;
1552 }
1553 else {
1554 /* this is an approximation */
1555 int depth;
1556 depth = GET_VISUAL_DEPTH(v);
1557 red_bits = depth / 3;
1558 depth -= red_bits;
1559 green_bits = depth / 2;
1560 depth -= green_bits;
1561 blue_bits = depth;
1562 alpha_bits = 0;
1563 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) );
1564 }
1565 }
1566
1567 if (alpha_flag && alpha_bits == 0)
1568 alpha_bits = 8;
1569
1570 v->gl_visual = _mesa_create_visual( rgb_flag, db_flag, stereo_flag,
1571 red_bits, green_bits,
1572 blue_bits, alpha_bits,
1573 v->index_bits,
1574 depth_size,
1575 stencil_size,
1576 accum_red_size, accum_green_size,
1577 accum_blue_size, accum_alpha_size,
1578 0 );
1579 if (!v->gl_visual) {
1580 #ifndef XFree86Server
1581 FREE(v->visinfo);
1582 #endif
1583 FREE(v);
1584 return NULL;
1585 }
1586
1587 return v;
1588 }
1589
1590
1591 void XMesaSetVisualDisplay( XMesaDisplay *dpy, XMesaVisual v )
1592 {
1593 v->display = dpy;
1594 }
1595
1596
1597 void XMesaDestroyVisual( XMesaVisual v )
1598 {
1599 _mesa_destroy_visual( v->gl_visual );
1600 #ifndef XFree86Server
1601 FREE(v->visinfo);
1602 #endif
1603 FREE(v);
1604 }
1605
1606
1607
1608 /*
1609 * Create a new XMesaContext.
1610 * Input: v - XMesaVisual
1611 * share_list - another XMesaContext with which to share display
1612 * lists or NULL if no sharing is wanted.
1613 * Return: an XMesaContext or NULL if error.
1614 */
1615 XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list )
1616 {
1617 XMesaContext c;
1618 GLcontext *ctx;
1619 GLboolean direct = GL_TRUE; /* XXXX */
1620 /* NOT_DONE: should this be GL_FALSE??? */
1621 static GLboolean firstTime = GL_TRUE;
1622
1623 if (firstTime) {
1624 _glthread_INIT_MUTEX(_xmesa_lock);
1625 firstTime = GL_FALSE;
1626 }
1627
1628 c = (XMesaContext) CALLOC_STRUCT(xmesa_context);
1629 if (!c) {
1630 return NULL;
1631 }
1632
1633 ctx = c->gl_ctx = _mesa_create_context( v->gl_visual,
1634 share_list ? share_list->gl_ctx : (GLcontext *) NULL,
1635 (void *) c, direct );
1636 if (!c->gl_ctx) {
1637 FREE(c);
1638 return NULL;
1639 }
1640
1641 gl_extensions_enable(ctx, "GL_HP_occlusion_test");
1642 gl_extensions_enable(ctx, "GL_ARB_texture_cube_map");
1643 gl_extensions_enable(ctx, "GL_EXT_texture_env_combine");
1644
1645 if (CHECK_BYTE_ORDER(v)) {
1646 c->swapbytes = GL_FALSE;
1647 }
1648 else {
1649 c->swapbytes = GL_TRUE;
1650 }
1651
1652 c->xm_visual = v;
1653 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */
1654 c->display = v->display;
1655 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */
1656
1657 ctx->Driver.UpdateState = xmesa_update_state;
1658
1659 #if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server)
1660 c->driContextPriv = driContextPriv;
1661 #endif
1662
1663 /* Set up some constant pointers:
1664 */
1665 xmesa_init_pointers( ctx );
1666
1667 /* Initialize the software rasterizer and helper modules.
1668 */
1669 _swrast_CreateContext( ctx );
1670 _swsetup_CreateContext( ctx );
1671 _tnl_CreateContext( ctx );
1672
1673 xmesa_register_swrast_functions( ctx );
1674
1675 /* Run the config file
1676 */
1677 _mesa_context_initialize( ctx );
1678
1679
1680 return c;
1681 }
1682
1683
1684
1685
1686 void XMesaDestroyContext( XMesaContext c )
1687 {
1688 #ifdef FX
1689 if (c->xm_buffer && c->xm_buffer->FXctx)
1690 fxMesaDestroyContext(c->xm_buffer->FXctx);
1691 #endif
1692 if (c->gl_ctx) {
1693 _swsetup_DestroyContext( c->gl_ctx );
1694 _swrast_DestroyContext( c->gl_ctx );
1695 _mesa_destroy_context( c->gl_ctx );
1696 }
1697
1698 /* Disassociate old buffer with this context */
1699 if (c->xm_buffer)
1700 c->xm_buffer->xm_context = NULL;
1701
1702 /* Destroy any buffers which are using this context. If we don't
1703 * we may have dangling references. Hmm, maybe we should just
1704 * set the buffer's context pointer to NULL instead of deleting it?
1705 * Let's see if we get any bug reports...
1706 * This contributed by Doug Rabson <dfr@calcaphon.com>
1707 */
1708 {
1709 XMesaBuffer b, next;
1710 for (b = XMesaBufferList; b; b = next) {
1711 next = b->Next;
1712 if (!b->pixmap_flag) {
1713 #ifndef XFree86Server
1714 XSync(b->display, False);
1715 #endif
1716 if (b->xm_context == c) {
1717 /* found a context created for this context */
1718 XMesaDestroyBuffer( b );
1719 }
1720 }
1721 }
1722 }
1723
1724 FREE( c );
1725 }
1726
1727
1728
1729 /*
1730 * XXX this isn't a public function! It's a hack for the 3Dfx driver.
1731 * Create a new XMesaBuffer from an X window.
1732 * Input: v - the XMesaVisual
1733 * w - the window
1734 * c - the context
1735 * Return: new XMesaBuffer or NULL if error
1736 */
1737 XMesaBuffer XMesaCreateWindowBuffer2( XMesaVisual v, XMesaWindow w,
1738 XMesaContext c )
1739 {
1740 #ifndef XFree86Server
1741 XWindowAttributes attr;
1742 #endif
1743 #ifdef FX
1744 char *fxEnvVar;
1745 #endif
1746 int client = 0;
1747
1748 XMesaBuffer b = alloc_xmesa_buffer();
1749 if (!b) {
1750 return NULL;
1751 }
1752
1753 (void) c;
1754
1755 #ifdef XFree86Server
1756 client = CLIENT_ID(((XMesaDrawable)w)->id);
1757 #endif
1758
1759 assert(v);
1760
1761 #ifdef XFree86Server
1762 if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->depth) {
1763 #else
1764 XGetWindowAttributes( v->display, w, &attr );
1765
1766 if (GET_VISUAL_DEPTH(v) != attr.depth) {
1767 #endif
1768 if (getenv("MESA_DEBUG")) {
1769 fprintf(stderr, "XMesaCreateWindowBuffer: depth mismatch between visual and window!\n");
1770 }
1771 return NULL;
1772 }
1773
1774 b->xm_context = NULL; /* Associate no context with this buffer */
1775
1776 b->xm_visual = v;
1777 b->pixmap_flag = GL_FALSE;
1778 b->display = v->display;
1779 #ifdef XFree86Server
1780 b->cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP);
1781 #else
1782 if (attr.colormap) {
1783 b->cmap = attr.colormap;
1784 }
1785 else {
1786 if (getenv("MESA_DEBUG")) {
1787 fprintf(stderr, "Window %u has no colormap!\n", (unsigned int) w);
1788 }
1789 /* this is weird, a window w/out a colormap!? */
1790 /* OK, let's just allocate a new one and hope for the best */
1791 b->cmap = XCreateColormap(v->display, w, attr.visual, AllocNone);
1792 }
1793 #endif
1794
1795 /* determine back buffer implementation */
1796 if (v->gl_visual->DBflag) {
1797 if (v->ximage_flag) {
1798 b->db_state = BACK_XIMAGE;
1799 }
1800 else {
1801 b->db_state = BACK_PIXMAP;
1802 }
1803 }
1804 else {
1805 b->db_state = 0;
1806 }
1807
1808 b->gl_buffer = _mesa_create_framebuffer( v->gl_visual,
1809 v->gl_visual->DepthBits > 0,
1810 v->gl_visual->StencilBits > 0,
1811 v->gl_visual->AccumRedBits > 0,
1812 v->gl_visual->AlphaBits > 0 );
1813 if (!b->gl_buffer) {
1814 free_xmesa_buffer(client, b);
1815 return NULL;
1816 }
1817
1818 if (!initialize_visual_and_buffer( client, v, b, v->gl_visual->RGBAflag,
1819 (XMesaDrawable)w, b->cmap )) {
1820 _mesa_destroy_framebuffer( b->gl_buffer );
1821 free_xmesa_buffer(client, b);
1822 return NULL;
1823 }
1824
1825 #ifdef FX
1826 fxEnvVar = getenv("MESA_GLX_FX");
1827 if (fxEnvVar) {
1828 if (fxEnvVar[0]!='d') {
1829 int attribs[100];
1830 int numAttribs = 0;
1831 int hw;
1832 if (v->gl_visual->DepthBits > 0) {
1833 attribs[numAttribs++] = FXMESA_DEPTH_SIZE;
1834 attribs[numAttribs++] = 1;
1835 }
1836 if (v->gl_visual->DBflag) {
1837 attribs[numAttribs++] = FXMESA_DOUBLEBUFFER;
1838 }
1839 if (v->gl_visual->AccumRedBits > 0) {
1840 attribs[numAttribs++] = FXMESA_ACCUM_SIZE;
1841 attribs[numAttribs++] = v->gl_visual->AccumRedBits;
1842 }
1843 if (v->gl_visual->StencilBits > 0) {
1844 attribs[numAttribs++] = FXMESA_STENCIL_SIZE;
1845 attribs[numAttribs++] = v->gl_visual->StencilBits;
1846 }
1847 if (v->gl_visual->AlphaBits > 0) {
1848 attribs[numAttribs++] = FXMESA_ALPHA_SIZE;
1849 attribs[numAttribs++] = 1;
1850 }
1851 if (c->gl_ctx) {
1852 #define FXMESA_SHARE_CONTEXT 990099 /* keep in sync with fxapi.c! */
1853 attribs[numAttribs++] = FXMESA_SHARE_CONTEXT;
1854 attribs[numAttribs++] = (int) c->gl_ctx;
1855 }
1856 attribs[numAttribs++] = FXMESA_NONE;
1857
1858 if ((hw = fxQueryHardware())==GR_SSTTYPE_VOODOO) {
1859 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs);
1860 if ((v->undithered_pf!=PF_INDEX) && (b->backimage)) {
1861 b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE;
1862 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W')
1863 b->FXwindowHack = b->FXctx ? GL_TRUE : GL_FALSE;
1864 else
1865 b->FXwindowHack = GL_FALSE;
1866 }
1867 }
1868 else {
1869 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W')
1870 b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE,
1871 GR_REFRESH_75Hz, attribs);
1872 else
1873 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs);
1874 b->FXisHackUsable = GL_FALSE;
1875 b->FXwindowHack = GL_FALSE;
1876 }
1877 /*
1878 fprintf(stderr,
1879 "voodoo %d, wid %d height %d hack: usable %d active %d\n",
1880 hw, b->width, b->height, b->FXisHackUsable, b->FXwindowHack);
1881 */
1882 }
1883 }
1884 else {
1885 fprintf(stderr,"WARNING: This Mesa Library includes the Glide driver but\n");
1886 fprintf(stderr," you have not defined the MESA_GLX_FX env. var.\n");
1887 fprintf(stderr," (check the README.3DFX file for more information).\n\n");
1888 fprintf(stderr," you can disable this message with a 'export MESA_GLX_FX=disable'.\n");
1889 }
1890 #endif
1891
1892 #if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server)
1893 b->driDrawPriv = driDrawPriv;
1894 #endif
1895
1896 return b;
1897 }
1898
1899
1900 XMesaBuffer XMesaCreateWindowBuffer( XMesaVisual v, XMesaWindow w )
1901 {
1902 return XMesaCreateWindowBuffer2( v, w, NULL );
1903 }
1904
1905
1906 /*
1907 * Create a new XMesaBuffer from an X pixmap.
1908 * Input: v - the XMesaVisual
1909 * p - the pixmap
1910 * cmap - the colormap, may be 0 if using a TrueColor or DirectColor
1911 * visual for the pixmap
1912 * Return: new XMesaBuffer or NULL if error
1913 */
1914 XMesaBuffer XMesaCreatePixmapBuffer( XMesaVisual v,
1915 XMesaPixmap p, XMesaColormap cmap )
1916 {
1917 int client = 0;
1918 XMesaBuffer b = alloc_xmesa_buffer();
1919 if (!b) {
1920 return NULL;
1921 }
1922
1923
1924 #ifdef XFree86Server
1925 client = CLIENT_ID(((XMesaDrawable)p)->id);
1926 #endif
1927
1928 assert(v);
1929
1930 b->xm_context = NULL; /* Associate no context with this buffer */
1931
1932 b->xm_visual = v;
1933 b->pixmap_flag = GL_TRUE;
1934 b->display = v->display;
1935 b->cmap = cmap;
1936
1937 /* determine back buffer implementation */
1938 if (v->gl_visual->DBflag) {
1939 if (v->ximage_flag) {
1940 b->db_state = BACK_XIMAGE;
1941 }
1942 else {
1943 b->db_state = BACK_PIXMAP;
1944 }
1945 }
1946 else {
1947 b->db_state = 0;
1948 }
1949
1950 b->gl_buffer = _mesa_create_framebuffer( v->gl_visual,
1951 v->gl_visual->DepthBits > 0,
1952 v->gl_visual->StencilBits > 0,
1953 v->gl_visual->AccumRedBits +
1954 v->gl_visual->AccumGreenBits +
1955 v->gl_visual->AccumBlueBits > 0,
1956 v->gl_visual->AlphaBits > 0 );
1957 if (!b->gl_buffer) {
1958 free_xmesa_buffer(client, b);
1959 return NULL;
1960 }
1961
1962 if (!initialize_visual_and_buffer(client, v, b, v->gl_visual->RGBAflag,
1963 (XMesaDrawable)p, cmap)) {
1964 _mesa_destroy_framebuffer( b->gl_buffer );
1965 free_xmesa_buffer(client, b);
1966 return NULL;
1967 }
1968
1969 #if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server)
1970 b->driDrawPriv = driDrawPriv;
1971 #endif
1972
1973 return b;
1974 }
1975
1976
1977
1978 /*
1979 * Deallocate an XMesaBuffer structure and all related info.
1980 */
1981 void XMesaDestroyBuffer( XMesaBuffer b )
1982 {
1983 int client = 0;
1984
1985 #ifdef XFree86Server
1986 if (b->frontbuffer)
1987 client = CLIENT_ID(b->frontbuffer->id);
1988 #endif
1989
1990 if (b->gc) XMesaFreeGC( b->xm_visual->display, b->gc );
1991 if (b->cleargc) XMesaFreeGC( b->xm_visual->display, b->cleargc );
1992
1993 if (b->backimage) {
1994 #if defined(USE_XSHM) && !defined(XFree86Server)
1995 if (b->shm) {
1996 XShmDetach( b->xm_visual->display, &b->shminfo );
1997 XDestroyImage( b->backimage );
1998 shmdt( b->shminfo.shmaddr );
1999 }
2000 else
2001 #endif
2002 XMesaDestroyImage( b->backimage );
2003 }
2004 if (b->backpixmap) {
2005 XMesaFreePixmap( b->xm_visual->display, b->backpixmap );
2006 if (b->xm_visual->hpcr_clear_flag) {
2007 XMesaFreePixmap( b->xm_visual->display,
2008 b->xm_visual->hpcr_clear_pixmap );
2009 XMesaDestroyImage( b->xm_visual->hpcr_clear_ximage );
2010 }
2011 }
2012 if (b->rowimage) {
2013 FREE( b->rowimage->data );
2014 b->rowimage->data = NULL;
2015 XMesaDestroyImage( b->rowimage );
2016 }
2017
2018 if (b->xm_context)
2019 b->xm_context->xm_buffer = NULL;
2020
2021 _mesa_destroy_framebuffer( b->gl_buffer );
2022 free_xmesa_buffer(client, b);
2023 }
2024
2025
2026
2027 /*
2028 * Bind buffer b to context c and make c the current rendering context.
2029 */
2030 GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b )
2031 {
2032 return XMesaMakeCurrent2( c, b, b );
2033 }
2034
2035
2036 /*
2037 * Bind buffer b to context c and make c the current rendering context.
2038 */
2039 GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer,
2040 XMesaBuffer readBuffer )
2041 {
2042 if (c) {
2043 if (!drawBuffer || !readBuffer)
2044 return GL_FALSE; /* must specify buffers! */
2045
2046 #ifdef FX
2047 if (drawBuffer->FXctx) {
2048 fxMesaMakeCurrent(drawBuffer->FXctx);
2049
2050 /* Disassociate old buffer from this context */
2051 if (c->xm_buffer)
2052 c->xm_buffer->xm_context = NULL;
2053
2054 /* Associate the context with this buffer */
2055 drawBuffer->xm_context = c;
2056
2057 c->xm_buffer = drawBuffer;
2058 c->xm_read_buffer = readBuffer;
2059 c->use_read_buffer = (drawBuffer != readBuffer);
2060
2061 return GL_TRUE;
2062 }
2063 #endif
2064 if (c->gl_ctx == _mesa_get_current_context()
2065 && c->xm_buffer == drawBuffer
2066 && c->xm_read_buffer == readBuffer
2067 && c->xm_buffer->wasCurrent) {
2068 /* same context and buffer, do nothing */
2069 return GL_TRUE;
2070 }
2071
2072 /* Disassociate old buffer with this context */
2073 if (c->xm_buffer)
2074 c->xm_buffer->xm_context = NULL;
2075 drawBuffer->xm_context = c; /* Associate the context with this buffer */
2076
2077 c->xm_buffer = drawBuffer;
2078 c->xm_read_buffer = readBuffer;
2079 c->use_read_buffer = (drawBuffer != readBuffer);
2080
2081 _mesa_make_current2(c->gl_ctx, drawBuffer->gl_buffer, readBuffer->gl_buffer);
2082
2083 if (c->gl_ctx->Viewport.Width == 0) {
2084 /* initialize viewport to window size */
2085 _mesa_Viewport( 0, 0, drawBuffer->width, drawBuffer->height );
2086 c->gl_ctx->Scissor.Width = drawBuffer->width;
2087 c->gl_ctx->Scissor.Height = drawBuffer->height;
2088 }
2089
2090 if (c->xm_visual->gl_visual->RGBAflag) {
2091 /*
2092 * Must recompute and set these pixel values because colormap
2093 * can be different for different windows.
2094 */
2095 c->clearpixel = xmesa_color_to_pixel( c,
2096 c->clearcolor[0],
2097 c->clearcolor[1],
2098 c->clearcolor[2],
2099 c->clearcolor[3],
2100 c->xm_visual->undithered_pf);
2101 XMesaSetForeground(c->display, c->xm_buffer->cleargc, c->clearpixel);
2102 }
2103
2104 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */
2105 c->xm_buffer->wasCurrent = GL_TRUE;
2106 }
2107 else {
2108 /* Detach */
2109 _mesa_make_current2( NULL, NULL, NULL );
2110 }
2111 return GL_TRUE;
2112 }
2113
2114
2115 /*
2116 * Unbind the context c from its buffer.
2117 */
2118 GLboolean XMesaUnbindContext( XMesaContext c )
2119 {
2120 /* A no-op for XFree86 integration purposes */
2121 return GL_TRUE;
2122 }
2123
2124
2125 XMesaContext XMesaGetCurrentContext( void )
2126 {
2127 GET_CURRENT_CONTEXT(ctx);
2128 if (ctx) {
2129 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
2130 return xmesa;
2131 }
2132 else {
2133 return 0;
2134 }
2135 }
2136
2137
2138 XMesaBuffer XMesaGetCurrentBuffer( void )
2139 {
2140 GET_CURRENT_CONTEXT(ctx);
2141 if (ctx) {
2142 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
2143 return xmesa->xm_buffer;
2144 }
2145 else {
2146 return 0;
2147 }
2148 }
2149
2150
2151 /* New in Mesa 3.1 */
2152 XMesaBuffer XMesaGetCurrentReadBuffer( void )
2153 {
2154 GET_CURRENT_CONTEXT(ctx);
2155 if (ctx) {
2156 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
2157 return xmesa->xm_buffer;
2158 }
2159 else {
2160 return 0;
2161 }
2162 }
2163
2164
2165 GLboolean XMesaForceCurrent(XMesaContext c)
2166 {
2167 if (c) {
2168 if (c->gl_ctx != _mesa_get_current_context()) {
2169 _mesa_make_current(c->gl_ctx, c->xm_buffer->gl_buffer);
2170 }
2171 }
2172 else {
2173 _mesa_make_current(NULL, NULL);
2174 }
2175 return GL_TRUE;
2176 }
2177
2178
2179 GLboolean XMesaLoseCurrent(XMesaContext c)
2180 {
2181 (void) c;
2182 _mesa_make_current(NULL, NULL);
2183 return GL_TRUE;
2184 }
2185
2186
2187 /*
2188 * Switch 3Dfx support hack between window and full-screen mode.
2189 */
2190 GLboolean XMesaSetFXmode( GLint mode )
2191 {
2192 #ifdef FX
2193 const char *fx = getenv("MESA_GLX_FX");
2194 if (fx && fx[0] != 'd') {
2195 GET_CURRENT_CONTEXT(ctx);
2196 GrHwConfiguration hw;
2197 if (!FX_grSstQueryHardware(&hw)) {
2198 /*fprintf(stderr, "!grSstQueryHardware\n");*/
2199 return GL_FALSE;
2200 }
2201 if (hw.num_sst < 1) {
2202 /*fprintf(stderr, "hw.num_sst < 1\n");*/
2203 return GL_FALSE;
2204 }
2205 if (ctx) {
2206 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx;
2207 if (mode == XMESA_FX_WINDOW) {
2208 if (xmesa->xm_buffer->FXisHackUsable) {
2209 FX_grSstControl(GR_CONTROL_DEACTIVATE);
2210 xmesa->xm_buffer->FXwindowHack = GL_TRUE;
2211 return GL_TRUE;
2212 }
2213 }
2214 else if (mode == XMESA_FX_FULLSCREEN) {
2215 FX_grSstControl(GR_CONTROL_ACTIVATE);
2216 xmesa->xm_buffer->FXwindowHack = GL_FALSE;
2217 return GL_TRUE;
2218 }
2219 else {
2220 /* Error: Bad mode value */
2221 }
2222 }
2223 }
2224 /*fprintf(stderr, "fallthrough\n");*/
2225 #else
2226 (void) mode;
2227 #endif
2228 return GL_FALSE;
2229 }
2230
2231
2232
2233 #ifdef FX
2234 /*
2235 * Read image from VooDoo frame buffer into X/Mesa's back XImage.
2236 */
2237 static void FXgetImage( XMesaBuffer b )
2238 {
2239 static unsigned short pixbuf[MAX_WIDTH];
2240 int x, y;
2241 XMesaWindow root;
2242 unsigned int bw, depth, width, height;
2243 XMesaContext xmesa = (XMesaContext) b->xm_context->gl_ctx->DriverCtx;
2244
2245 assert(xmesa->xm_buffer->FXctx);
2246
2247 #ifdef XFree86Server
2248 x = b->frontbuffer->x;
2249 y = b->frontbuffer->y;
2250 width = b->frontbuffer->width;
2251 height = b->frontbuffer->height;
2252 depth = b->frontbuffer->depth;
2253 #else
2254 XGetGeometry( xmesa->xm_visual->display, b->frontbuffer,
2255 &root, &x, &y, &width, &height, &bw, &depth);
2256 #endif
2257 if (b->width != width || b->height != height) {
2258 b->width = MIN2((int)width, xmesa->xm_buffer->FXctx->width);
2259 b->height = MIN2((int)height, xmesa->xm_buffer->FXctx->height);
2260 if (b->width & 1)
2261 b->width--; /* prevent odd width */
2262 xmesa_alloc_back_buffer( b );
2263 }
2264
2265 grLfbWriteColorFormat(GR_COLORFORMAT_ARGB);
2266 if (xmesa->xm_visual->undithered_pf==PF_5R6G5B) {
2267 /* Special case: 16bpp RGB */
2268 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, /* src buffer */
2269 0, xmesa->xm_buffer->FXctx->height - b->height, /*pos*/
2270 b->width, b->height, /* size */
2271 b->width * sizeof(GLushort), /* stride */
2272 b->backimage->data); /* dest buffer */
2273 }
2274 else if (xmesa->xm_visual->dithered_pf==PF_DITHER
2275 && GET_VISUAL_DEPTH(xmesa->xm_visual)==8) {
2276 /* Special case: 8bpp RGB */
2277 for (y=0;y<b->height;y++) {
2278 GLubyte *ptr = (GLubyte*) xmesa->xm_buffer->backimage->data
2279 + xmesa->xm_buffer->backimage->bytes_per_line * y;
2280 XDITHER_SETUP(y);
2281
2282 /* read row from 3Dfx frame buffer */
2283 grLfbReadRegion( GR_BUFFER_FRONTBUFFER,
2284 0, xmesa->xm_buffer->FXctx->height-(b->height-y),
2285 b->width, 1,
2286 0,
2287 pixbuf );
2288
2289 /* write to XImage back buffer */
2290 for (x=0;x<b->width;x++) {
2291 GLubyte r = (pixbuf[x] & 0xf800) >> 8;
2292 GLubyte g = (pixbuf[x] & 0x07e0) >> 3;
2293 GLubyte b = (pixbuf[x] & 0x001f) << 3;
2294 *ptr++ = XDITHER( x, r, g, b);
2295 }
2296 }
2297 }
2298 else {
2299 /* General case: slow! */
2300 for (y=0;y<b->height;y++) {
2301 /* read row from 3Dfx frame buffer */
2302 grLfbReadRegion( GR_BUFFER_FRONTBUFFER,
2303 0, xmesa->xm_buffer->FXctx->height-(b->height-y),
2304 b->width, 1,
2305 0,
2306 pixbuf );
2307
2308 /* write to XImage back buffer */
2309 for (x=0;x<b->width;x++) {
2310 XMesaPutPixel(b->backimage,x,y,
2311 xmesa_color_to_pixel(xmesa,
2312 (pixbuf[x] & 0xf800) >> 8,
2313 (pixbuf[x] & 0x07e0) >> 3,
2314 (pixbuf[x] & 0x001f) << 3,
2315 0xff, xmesa->pixelformat));
2316 }
2317 }
2318 }
2319 grLfbWriteColorFormat(GR_COLORFORMAT_ABGR);
2320 }
2321 #endif
2322
2323
2324 /*
2325 * Copy the back buffer to the front buffer. If there's no back buffer
2326 * this is a no-op.
2327 */
2328 void XMesaSwapBuffers( XMesaBuffer b )
2329 {
2330 GET_CURRENT_CONTEXT(ctx);
2331
2332 /* If we're swapping the buffer associated with the current context
2333 * we have to flush any pending rendering commands first.
2334 */
2335 if (b->xm_context && b->xm_context->gl_ctx == ctx)
2336 _mesa_swapbuffers(ctx);
2337
2338 if (b->db_state) {
2339 #ifdef FX
2340 if (b->FXctx) {
2341 fxMesaSwapBuffers();
2342
2343 if (b->FXwindowHack)
2344 FXgetImage(b);
2345 else
2346 return;
2347 }
2348 #endif
2349 if (b->backimage) {
2350 /* Copy Ximage from host's memory to server's window */
2351 #if defined(USE_XSHM) && !defined(XFree86Server)
2352 if (b->shm) {
2353 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2354 XShmPutImage( b->xm_visual->display, b->frontbuffer,
2355 b->cleargc,
2356 b->backimage, 0, 0,
2357 0, 0, b->width, b->height, False );
2358 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2359 }
2360 else
2361 #endif
2362 {
2363 #if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server)
2364 XMesaDriSwapBuffers( b );
2365 #else
2366 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2367 XMesaPutImage( b->xm_visual->display, b->frontbuffer,
2368 b->cleargc,
2369 b->backimage, 0, 0,
2370 0, 0, b->width, b->height );
2371 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2372 #endif
2373 }
2374 }
2375 else {
2376 /* Copy pixmap to window on server */
2377 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2378 XMesaCopyArea( b->xm_visual->display,
2379 b->backpixmap, /* source drawable */
2380 b->frontbuffer, /* dest. drawable */
2381 b->cleargc,
2382 0, 0, b->width, b->height, /* source region */
2383 0, 0 /* dest region */
2384 );
2385 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2386 }
2387 }
2388 #if !defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server)
2389 XSync( b->xm_visual->display, False );
2390 #endif
2391 }
2392
2393
2394
2395 /*
2396 * Copy sub-region of back buffer to front buffer
2397 */
2398 void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height )
2399 {
2400 GET_CURRENT_CONTEXT(ctx);
2401
2402 /* If we're swapping the buffer associated with the current context
2403 * we have to flush any pending rendering commands first.
2404 */
2405 if (b->xm_context->gl_ctx == ctx)
2406 _mesa_swapbuffers(ctx);
2407
2408 if (b->db_state) {
2409 int yTop = b->bottom - y - height;
2410 #ifdef FX
2411 if (b->FXctx) {
2412 fxMesaSwapBuffers();
2413 if (b->FXwindowHack)
2414 FXgetImage(b);
2415 else
2416 return;
2417 }
2418 #endif
2419 if (b->backimage) {
2420 /* Copy Ximage from host's memory to server's window */
2421 #if defined(USE_XSHM) && !defined(XFree86Server)
2422 if (b->shm) {
2423 /* XXX assuming width and height aren't too large! */
2424 XShmPutImage( b->xm_visual->display, b->frontbuffer,
2425 b->cleargc,
2426 b->backimage, x, yTop,
2427 x, yTop, width, height, False );
2428 /* wait for finished event??? */
2429 }
2430 else
2431 #endif
2432 {
2433 /* XXX assuming width and height aren't too large! */
2434 XMesaPutImage( b->xm_visual->display, b->frontbuffer,
2435 b->cleargc,
2436 b->backimage, x, yTop,
2437 x, yTop, width, height );
2438 }
2439 }
2440 else {
2441 /* Copy pixmap to window on server */
2442 XMesaCopyArea( b->xm_visual->display,
2443 b->backpixmap, /* source drawable */
2444 b->frontbuffer, /* dest. drawable */
2445 b->cleargc,
2446 x, yTop, width, height, /* source region */
2447 x, yTop /* dest region */
2448 );
2449 }
2450 }
2451 }
2452
2453
2454 /*
2455 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function
2456 * is a way to get "under the hood" of X/Mesa so one can manipulate the
2457 * back buffer directly.
2458 * Output: pixmap - pointer to back buffer's Pixmap, or 0
2459 * ximage - pointer to back buffer's XImage, or NULL
2460 * Return: GL_TRUE = context is double buffered
2461 * GL_FALSE = context is single buffered
2462 */
2463 GLboolean XMesaGetBackBuffer( XMesaBuffer b,
2464 XMesaPixmap *pixmap,
2465 XMesaImage **ximage )
2466 {
2467 if (b->db_state) {
2468 if (pixmap) *pixmap = b->backpixmap;
2469 if (ximage) *ximage = b->backimage;
2470 return GL_TRUE;
2471 }
2472 else {
2473 *pixmap = 0;
2474 *ximage = NULL;
2475 return GL_FALSE;
2476 }
2477 }
2478
2479
2480 /*
2481 * Return the depth buffer associated with an XMesaBuffer.
2482 * Input: b - the XMesa buffer handle
2483 * Output: width, height - size of buffer in pixels
2484 * bytesPerValue - bytes per depth value (2 or 4)
2485 * buffer - pointer to depth buffer values
2486 * Return: GL_TRUE or GL_FALSE to indicate success or failure.
2487 */
2488 GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height,
2489 GLint *bytesPerValue, void **buffer )
2490 {
2491 if ((!b->gl_buffer) || (!b->gl_buffer->DepthBuffer)) {
2492 *width = 0;
2493 *height = 0;
2494 *bytesPerValue = 0;
2495 *buffer = 0;
2496 return GL_FALSE;
2497 }
2498 else {
2499 *width = b->gl_buffer->Width;
2500 *height = b->gl_buffer->Height;
2501 *bytesPerValue = sizeof(GLdepth);
2502 *buffer = b->gl_buffer->DepthBuffer;
2503 return GL_TRUE;
2504 }
2505 }
2506
2507
2508 void XMesaFlush( XMesaContext c )
2509 {
2510 if (c && c->xm_visual) {
2511 #ifdef XFree86Server
2512 /* NOT_NEEDED */
2513 #else
2514 XSync( c->xm_visual->display, False );
2515 #endif
2516 }
2517 }
2518
2519
2520
2521 const char *XMesaGetString( XMesaContext c, int name )
2522 {
2523 (void) c;
2524 if (name==XMESA_VERSION) {
2525 return "3.1";
2526 }
2527 else if (name==XMESA_EXTENSIONS) {
2528 return "";
2529 }
2530 else {
2531 return NULL;
2532 }
2533 }
2534
2535
2536
2537 XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d )
2538 {
2539 XMesaBuffer b;
2540 for (b=XMesaBufferList; b; b=b->Next) {
2541 if (b->frontbuffer==d && b->display==dpy) {
2542 return b;
2543 }
2544 }
2545 return NULL;
2546 }
2547
2548
2549
2550 /*
2551 * Look for XMesaBuffers whose X window has been destroyed.
2552 * Deallocate any such XMesaBuffers.
2553 */
2554 void XMesaGarbageCollect( void )
2555 {
2556 XMesaBuffer b, next;
2557 for (b=XMesaBufferList; b; b=next) {
2558 next = b->Next;
2559 if (!b->pixmap_flag) {
2560 #ifdef XFree86Server
2561 /* NOT_NEEDED */
2562 #else
2563 XSync(b->display, False);
2564 if (!window_exists( b->display, b->frontbuffer )) {
2565 /* found a dead window, free the ancillary info */
2566 XMesaDestroyBuffer( b );
2567 }
2568 #endif
2569 }
2570 }
2571 }
2572
2573
2574 void XMesaReset( void )
2575 {
2576 while (XMesaBufferList)
2577 XMesaDestroyBuffer(XMesaBufferList);
2578
2579 XMesaBufferList = NULL;
2580 }
2581
2582
2583 unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y,
2584 GLfloat red, GLfloat green,
2585 GLfloat blue, GLfloat alpha )
2586 {
2587 GLint r = (GLint) (red * 255.0F);
2588 GLint g = (GLint) (green * 255.0F);
2589 GLint b = (GLint) (blue * 255.0F);
2590 GLint a = (GLint) (alpha * 255.0F);
2591
2592 switch (xmesa->pixelformat) {
2593 case PF_INDEX:
2594 return 0;
2595 case PF_TRUECOLOR:
2596 {
2597 unsigned long p;
2598 PACK_TRUECOLOR( p, r, g, b );
2599 return p;
2600 }
2601 case PF_8A8B8G8R:
2602 return PACK_8A8B8G8R( r, g, b, a );
2603 case PF_8R8G8B:
2604 return PACK_8R8G8B( r, g, b );
2605 case PF_5R6G5B:
2606 return PACK_5R6G5B( r, g, b );
2607 case PF_DITHER:
2608 {
2609 DITHER_SETUP;
2610 return DITHER( x, y, r, g, b );
2611 }
2612 case PF_1BIT:
2613 /* 382 = (3*255)/2 */
2614 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip;
2615 case PF_HPCR:
2616 return DITHER_HPCR(x, y, r, g, b);
2617 case PF_LOOKUP:
2618 {
2619 LOOKUP_SETUP;
2620 return LOOKUP( r, g, b );
2621 }
2622 case PF_GRAYSCALE:
2623 return GRAY_RGB( r, g, b );
2624 case PF_DITHER_5R6G5B:
2625 /* fall through */
2626 case PF_TRUEDITHER:
2627 {
2628 unsigned long p;
2629 PACK_TRUEDITHER(p, x, y, r, g, b);
2630 return p;
2631 }
2632 default:
2633 gl_problem(NULL, "Bad pixel format in XMesaDitherColor");
2634 }
2635 return 0;
2636 }
2637
2638