projects / mesa.git / blob
? search:


6696f70f5b8698647681ce56082a3011e3510c1f
[mesa.git] / src / mesa / drivers / x11 / xm_api.c
1 /*
2 * Mesa 3-D graphics library
3 * Version: 7.1
4 *
5 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25 /**
26 * \file xm_api.c
27 *
28 * All the XMesa* API functions.
29 *
30 *
31 * NOTES:
32 *
33 * The window coordinate system origin (0,0) is in the lower-left corner
34 * of the window. X11's window coordinate origin is in the upper-left
35 * corner of the window. Therefore, most drawing functions in this
36 * file have to flip Y coordinates.
37 *
38 * Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile
39 * in support for the MIT Shared Memory extension. If enabled, when you
40 * use an Ximage for the back buffer in double buffered mode, the "swap"
41 * operation will be faster. You must also link with -lXext.
42 *
43 * Byte swapping: If the Mesa host and the X display use a different
44 * byte order then there's some trickiness to be aware of when using
45 * XImages. The byte ordering used for the XImage is that of the X
46 * display, not the Mesa host.
47 * The color-to-pixel encoding for True/DirectColor must be done
48 * according to the display's visual red_mask, green_mask, and blue_mask.
49 * If XPutPixel is used to put a pixel into an XImage then XPutPixel will
50 * do byte swapping if needed. If one wants to directly "poke" the pixel
51 * into the XImage's buffer then the pixel must be byte swapped first. In
52 * Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format
53 * and use XPutPixel everywhere except in the implementation of
54 * glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so
55 * instead of using XPutPixel we "poke" our values after byte-swapping
56 * the clear pixel value if needed.
57 *
58 */
59
60 #ifdef __CYGWIN__
61 #undef WIN32
62 #undef __WIN32__
63 #endif
64
65 #include "glxheader.h"
66 #include "xmesaP.h"
67 #include "main/context.h"
68 #include "main/extensions.h"
69 #include "main/framebuffer.h"
70 #include "main/imports.h"
71 #include "main/macros.h"
72 #include "main/renderbuffer.h"
73 #include "main/teximage.h"
74 #include "glapi/glthread.h"
75 #include "swrast/swrast.h"
76 #include "swrast/s_renderbuffer.h"
77 #include "swrast_setup/swrast_setup.h"
78 #include "vbo/vbo.h"
79 #include "tnl/tnl.h"
80 #include "tnl/t_context.h"
81 #include "tnl/t_pipeline.h"
82 #include "drivers/common/driverfuncs.h"
83 #include "drivers/common/meta.h"
84
85 /**
86 * Global X driver lock
87 */
88 _glthread_Mutex _xmesa_lock;
89
90
91
92 /**********************************************************************/
93 /***** X Utility Functions *****/
94 /**********************************************************************/
95
96
97 /**
98 * Return the host's byte order as LSBFirst or MSBFirst ala X.
99 */
100 static int host_byte_order( void )
101 {
102 int i = 1;
103 char *cptr = (char *) &i;
104 return (*cptr==1) ? LSBFirst : MSBFirst;
105 }
106
107
108 /**
109 * Check if the X Shared Memory extension is available.
110 * Return: 0 = not available
111 * 1 = shared XImage support available
112 * 2 = shared Pixmap support available also
113 */
114 static int check_for_xshm( XMesaDisplay *display )
115 {
116 #if defined(USE_XSHM)
117 int ignore;
118
119 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) {
120 /* Note: we're no longer calling XShmQueryVersion() here. It seems
121 * to be flakey (triggers a spurious X protocol error when we close
122 * one display connection and start using a new one. XShm has been
123 * around a long time and hasn't changed so if MIT_SHM is supported
124 * we assume we're good to go.
125 */
126 return 2;
127 }
128 else {
129 return 0;
130 }
131 #else
132 /* No XSHM support */
133 return 0;
134 #endif
135 }
136
137
138 /**
139 * Apply gamma correction to an intensity value in [0..max]. Return the
140 * new intensity value.
141 */
142 static GLint
143 gamma_adjust( GLfloat gamma, GLint value, GLint max )
144 {
145 if (gamma == 1.0) {
146 return value;
147 }
148 else {
149 double x = (double) value / (double) max;
150 return IROUND_POS((GLfloat) max * pow(x, 1.0F/gamma));
151 }
152 }
153
154
155
156 /**
157 * Return the true number of bits per pixel for XImages.
158 * For example, if we request a 24-bit deep visual we may actually need/get
159 * 32bpp XImages. This function returns the appropriate bpp.
160 * Input: dpy - the X display
161 * visinfo - desribes the visual to be used for XImages
162 * Return: true number of bits per pixel for XImages
163 */
164 static int
165 bits_per_pixel( XMesaVisual xmv )
166 {
167 XMesaDisplay *dpy = xmv->display;
168 XMesaVisualInfo visinfo = xmv->visinfo;
169 XMesaImage *img;
170 int bitsPerPixel;
171 /* Create a temporary XImage */
172 img = XCreateImage( dpy, visinfo->visual, visinfo->depth,
173 ZPixmap, 0, /*format, offset*/
174 (char*) malloc(8), /*data*/
175 1, 1, /*width, height*/
176 32, /*bitmap_pad*/
177 0 /*bytes_per_line*/
178 );
179 assert(img);
180 /* grab the bits/pixel value */
181 bitsPerPixel = img->bits_per_pixel;
182 /* free the XImage */
183 free( img->data );
184 img->data = NULL;
185 XMesaDestroyImage( img );
186 return bitsPerPixel;
187 }
188
189
190
191 /*
192 * Determine if a given X window ID is valid (window exists).
193 * Do this by calling XGetWindowAttributes() for the window and
194 * checking if we catch an X error.
195 * Input: dpy - the display
196 * win - the window to check for existance
197 * Return: GL_TRUE - window exists
198 * GL_FALSE - window doesn't exist
199 */
200 static GLboolean WindowExistsFlag;
201
202 static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr )
203 {
204 (void) dpy;
205 if (xerr->error_code == BadWindow) {
206 WindowExistsFlag = GL_FALSE;
207 }
208 return 0;
209 }
210
211 static GLboolean window_exists( XMesaDisplay *dpy, Window win )
212 {
213 XWindowAttributes wa;
214 int (*old_handler)( XMesaDisplay*, XErrorEvent* );
215 WindowExistsFlag = GL_TRUE;
216 old_handler = XSetErrorHandler(window_exists_err_handler);
217 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */
218 XSetErrorHandler(old_handler);
219 return WindowExistsFlag;
220 }
221
222 static Status
223 get_drawable_size( XMesaDisplay *dpy, Drawable d, GLuint *width, GLuint *height )
224 {
225 Window root;
226 Status stat;
227 int xpos, ypos;
228 unsigned int w, h, bw, depth;
229 stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth);
230 *width = w;
231 *height = h;
232 return stat;
233 }
234
235
236 /**
237 * Return the size of the window (or pixmap) that corresponds to the
238 * given XMesaBuffer.
239 * \param width returns width in pixels
240 * \param height returns height in pixels
241 */
242 void
243 xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b,
244 GLuint *width, GLuint *height)
245 {
246 Status stat;
247
248 _glthread_LOCK_MUTEX(_xmesa_lock);
249 XSync(b->xm_visual->display, 0); /* added for Chromium */
250 stat = get_drawable_size(dpy, b->frontxrb->pixmap, width, height);
251 _glthread_UNLOCK_MUTEX(_xmesa_lock);
252
253 if (!stat) {
254 /* probably querying a window that's recently been destroyed */
255 _mesa_warning(NULL, "XGetGeometry failed!\n");
256 *width = *height = 1;
257 }
258 }
259
260
261
262 /**********************************************************************/
263 /***** Linked list of XMesaBuffers *****/
264 /**********************************************************************/
265
266 XMesaBuffer XMesaBufferList = NULL;
267
268
269 /**
270 * Allocate a new XMesaBuffer object which corresponds to the given drawable.
271 * Note that XMesaBuffer is derived from struct gl_framebuffer.
272 * The new XMesaBuffer will not have any size (Width=Height=0).
273 *
274 * \param d the corresponding X drawable (window or pixmap)
275 * \param type either WINDOW, PIXMAP or PBUFFER, describing d
276 * \param vis the buffer's visual
277 * \param cmap the window's colormap, if known.
278 * \return new XMesaBuffer or NULL if any problem
279 */
280 static XMesaBuffer
281 create_xmesa_buffer(XMesaDrawable d, BufferType type,
282 XMesaVisual vis, XMesaColormap cmap)
283 {
284 XMesaBuffer b;
285
286 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER);
287
288 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer);
289 if (!b)
290 return NULL;
291
292 b->display = vis->display;
293 b->xm_visual = vis;
294 b->type = type;
295 b->cmap = cmap;
296
297 _mesa_initialize_window_framebuffer(&b->mesa_buffer, &vis->mesa_visual);
298 b->mesa_buffer.Delete = xmesa_delete_framebuffer;
299
300 /*
301 * Front renderbuffer
302 */
303 b->frontxrb = xmesa_new_renderbuffer(NULL, 0, vis, GL_FALSE);
304 if (!b->frontxrb) {
305 free(b);
306 return NULL;
307 }
308 b->frontxrb->Parent = b;
309 b->frontxrb->drawable = d;
310 b->frontxrb->pixmap = (XMesaPixmap) d;
311 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_FRONT_LEFT,
312 &b->frontxrb->Base.Base);
313
314 /*
315 * Back renderbuffer
316 */
317 if (vis->mesa_visual.doubleBufferMode) {
318 b->backxrb = xmesa_new_renderbuffer(NULL, 0, vis, GL_TRUE);
319 if (!b->backxrb) {
320 /* XXX free front xrb too */
321 free(b);
322 return NULL;
323 }
324 b->backxrb->Parent = b;
325 /* determine back buffer implementation */
326 b->db_mode = vis->ximage_flag ? BACK_XIMAGE : BACK_PIXMAP;
327
328 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_BACK_LEFT,
329 &b->backxrb->Base.Base);
330 }
331
332 /*
333 * Other renderbuffer (depth, stencil, etc)
334 */
335 _swrast_add_soft_renderbuffers(&b->mesa_buffer,
336 GL_FALSE, /* color */
337 vis->mesa_visual.haveDepthBuffer,
338 vis->mesa_visual.haveStencilBuffer,
339 vis->mesa_visual.haveAccumBuffer,
340 GL_FALSE, /* software alpha buffer */
341 vis->mesa_visual.numAuxBuffers > 0 );
342
343 /* GLX_EXT_texture_from_pixmap */
344 b->TextureTarget = 0;
345 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT;
346 b->TextureMipmap = 0;
347
348 /* insert buffer into linked list */
349 b->Next = XMesaBufferList;
350 XMesaBufferList = b;
351
352 return b;
353 }
354
355
356 /**
357 * Find an XMesaBuffer by matching X display and colormap but NOT matching
358 * the notThis buffer.
359 */
360 XMesaBuffer
361 xmesa_find_buffer(XMesaDisplay *dpy, XMesaColormap cmap, XMesaBuffer notThis)
362 {
363 XMesaBuffer b;
364 for (b=XMesaBufferList; b; b=b->Next) {
365 if (b->display==dpy && b->cmap==cmap && b!=notThis) {
366 return b;
367 }
368 }
369 return NULL;
370 }
371
372
373 /**
374 * Remove buffer from linked list, delete if no longer referenced.
375 */
376 static void
377 xmesa_free_buffer(XMesaBuffer buffer)
378 {
379 XMesaBuffer prev = NULL, b;
380
381 for (b = XMesaBufferList; b; b = b->Next) {
382 if (b == buffer) {
383 struct gl_framebuffer *fb = &buffer->mesa_buffer;
384
385 /* unlink buffer from list */
386 if (prev)
387 prev->Next = buffer->Next;
388 else
389 XMesaBufferList = buffer->Next;
390
391 /* mark as delete pending */
392 fb->DeletePending = GL_TRUE;
393
394 /* Since the X window for the XMesaBuffer is going away, we don't
395 * want to dereference this pointer in the future.
396 */
397 b->frontxrb->drawable = 0;
398
399 /* Unreference. If count = zero we'll really delete the buffer */
400 _mesa_reference_framebuffer(&fb, NULL);
401
402 return;
403 }
404 /* continue search */
405 prev = b;
406 }
407 /* buffer not found in XMesaBufferList */
408 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n");
409 }
410
411
412
413
414 /**********************************************************************/
415 /***** Misc Private Functions *****/
416 /**********************************************************************/
417
418
419 /**
420 * Setup RGB rendering for a window with a True/DirectColor visual.
421 */
422 static void
423 setup_truecolor(XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap)
424 {
425 unsigned long rmask, gmask, bmask;
426 (void) buffer;
427 (void) cmap;
428
429 /* Compute red multiplier (mask) and bit shift */
430 v->rshift = 0;
431 rmask = GET_REDMASK(v);
432 while ((rmask & 1)==0) {
433 v->rshift++;
434 rmask = rmask >> 1;
435 }
436
437 /* Compute green multiplier (mask) and bit shift */
438 v->gshift = 0;
439 gmask = GET_GREENMASK(v);
440 while ((gmask & 1)==0) {
441 v->gshift++;
442 gmask = gmask >> 1;
443 }
444
445 /* Compute blue multiplier (mask) and bit shift */
446 v->bshift = 0;
447 bmask = GET_BLUEMASK(v);
448 while ((bmask & 1)==0) {
449 v->bshift++;
450 bmask = bmask >> 1;
451 }
452
453 /*
454 * Compute component-to-pixel lookup tables and dithering kernel
455 */
456 {
457 static GLubyte kernel[16] = {
458 0*16, 8*16, 2*16, 10*16,
459 12*16, 4*16, 14*16, 6*16,
460 3*16, 11*16, 1*16, 9*16,
461 15*16, 7*16, 13*16, 5*16,
462 };
463 GLint rBits = _mesa_bitcount(rmask);
464 GLint gBits = _mesa_bitcount(gmask);
465 GLint bBits = _mesa_bitcount(bmask);
466 GLint maxBits;
467 GLuint i;
468
469 /* convert pixel components in [0,_mask] to RGB values in [0,255] */
470 for (i=0; i<=rmask; i++)
471 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask);
472 for (i=0; i<=gmask; i++)
473 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask);
474 for (i=0; i<=bmask; i++)
475 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask);
476
477 /* convert RGB values from [0,255] to pixel components */
478
479 for (i=0;i<256;i++) {
480 GLint r = gamma_adjust(v->RedGamma, i, 255);
481 GLint g = gamma_adjust(v->GreenGamma, i, 255);
482 GLint b = gamma_adjust(v->BlueGamma, i, 255);
483 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift;
484 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift;
485 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift;
486 }
487 /* overflow protection */
488 for (i=256;i<512;i++) {
489 v->RtoPixel[i] = v->RtoPixel[255];
490 v->GtoPixel[i] = v->GtoPixel[255];
491 v->BtoPixel[i] = v->BtoPixel[255];
492 }
493
494 /* setup dithering kernel */
495 maxBits = rBits;
496 if (gBits > maxBits) maxBits = gBits;
497 if (bBits > maxBits) maxBits = bBits;
498 for (i=0;i<16;i++) {
499 v->Kernel[i] = kernel[i] >> maxBits;
500 }
501
502 v->undithered_pf = PF_Truecolor;
503 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor;
504 }
505
506 /*
507 * Now check for TrueColor visuals which we can optimize.
508 */
509 if ( GET_REDMASK(v) ==0x0000ff
510 && GET_GREENMASK(v)==0x00ff00
511 && GET_BLUEMASK(v) ==0xff0000
512 && CHECK_BYTE_ORDER(v)
513 && v->BitsPerPixel==32
514 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) {
515 /* common 32 bpp config used on SGI, Sun */
516 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; /* ABGR */
517 }
518 else if (GET_REDMASK(v) == 0xff0000
519 && GET_GREENMASK(v)== 0x00ff00
520 && GET_BLUEMASK(v) == 0x0000ff
521 && CHECK_BYTE_ORDER(v)
522 && v->RedGamma == 1.0 && v->GreenGamma == 1.0 && v->BlueGamma == 1.0){
523 if (v->BitsPerPixel==32) {
524 /* if 32 bpp, and visual indicates 8 bpp alpha channel */
525 if (GET_VISUAL_DEPTH(v) == 32 && v->mesa_visual.alphaBits == 8)
526 v->undithered_pf = v->dithered_pf = PF_8A8R8G8B; /* ARGB */
527 else
528 v->undithered_pf = v->dithered_pf = PF_8R8G8B; /* xRGB */
529 }
530 else if (v->BitsPerPixel == 24) {
531 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; /* RGB */
532 }
533 }
534 else if (GET_REDMASK(v) ==0xf800
535 && GET_GREENMASK(v)==0x07e0
536 && GET_BLUEMASK(v) ==0x001f
537 && CHECK_BYTE_ORDER(v)
538 && v->BitsPerPixel==16
539 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) {
540 /* 5-6-5 RGB */
541 v->undithered_pf = PF_5R6G5B;
542 v->dithered_pf = PF_Dither_5R6G5B;
543 }
544 }
545
546
547 /**
548 * When a context is bound for the first time, we can finally finish
549 * initializing the context's visual and buffer information.
550 * \param v the XMesaVisual to initialize
551 * \param b the XMesaBuffer to initialize (may be NULL)
552 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode
553 * \param window the window/pixmap we're rendering into
554 * \param cmap the colormap associated with the window/pixmap
555 * \return GL_TRUE=success, GL_FALSE=failure
556 */
557 static GLboolean
558 initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b,
559 XMesaDrawable window,
560 XMesaColormap cmap)
561 {
562 const int xclass = v->visualType;
563
564
565 ASSERT(!b || b->xm_visual == v);
566
567 /* Save true bits/pixel */
568 v->BitsPerPixel = bits_per_pixel(v);
569 assert(v->BitsPerPixel > 0);
570
571 /* RGB WINDOW:
572 * We support RGB rendering into almost any kind of visual.
573 */
574 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
575 setup_truecolor( v, b, cmap );
576 }
577 else {
578 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual.\n");
579 return GL_FALSE;
580 }
581 v->mesa_visual.indexBits = 0;
582
583 if (_mesa_getenv("MESA_NO_DITHER")) {
584 v->dithered_pf = v->undithered_pf;
585 }
586
587
588 /*
589 * If MESA_INFO env var is set print out some debugging info
590 * which can help Brian figure out what's going on when a user
591 * reports bugs.
592 */
593 if (_mesa_getenv("MESA_INFO")) {
594 printf("X/Mesa visual = %p\n", (void *) v);
595 printf("X/Mesa dithered pf = %u\n", v->dithered_pf);
596 printf("X/Mesa undithered pf = %u\n", v->undithered_pf);
597 printf("X/Mesa level = %d\n", v->mesa_visual.level);
598 printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v));
599 printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel);
600 }
601
602 if (b && window) {
603 /* Do window-specific initializations */
604
605 /* these should have been set in create_xmesa_buffer */
606 ASSERT(b->frontxrb->drawable == window);
607 ASSERT(b->frontxrb->pixmap == (XMesaPixmap) window);
608
609 /* Setup for single/double buffering */
610 if (v->mesa_visual.doubleBufferMode) {
611 /* Double buffered */
612 b->shm = check_for_xshm( v->display );
613 }
614
615 /* X11 graphics contexts */
616 b->gc = XCreateGC( v->display, window, 0, NULL );
617 XMesaSetFunction( v->display, b->gc, GXcopy );
618
619 /* cleargc - for glClear() */
620 b->cleargc = XCreateGC( v->display, window, 0, NULL );
621 XMesaSetFunction( v->display, b->cleargc, GXcopy );
622
623 /*
624 * Don't generate Graphics Expose/NoExpose events in swapbuffers().
625 * Patch contributed by Michael Pichler May 15, 1995.
626 */
627 {
628 XGCValues gcvalues;
629 gcvalues.graphics_exposures = False;
630 b->swapgc = XCreateGC(v->display, window,
631 GCGraphicsExposures, &gcvalues);
632 }
633 XMesaSetFunction( v->display, b->swapgc, GXcopy );
634 }
635
636 return GL_TRUE;
637 }
638
639
640
641 /*
642 * Convert an RGBA color to a pixel value.
643 */
644 unsigned long
645 xmesa_color_to_pixel(struct gl_context *ctx,
646 GLubyte r, GLubyte g, GLubyte b, GLubyte a,
647 GLuint pixelFormat)
648 {
649 XMesaContext xmesa = XMESA_CONTEXT(ctx);
650 switch (pixelFormat) {
651 case PF_Truecolor:
652 {
653 unsigned long p;
654 PACK_TRUECOLOR( p, r, g, b );
655 return p;
656 }
657 case PF_8A8B8G8R:
658 return PACK_8A8B8G8R( r, g, b, a );
659 case PF_8A8R8G8B:
660 return PACK_8A8R8G8B( r, g, b, a );
661 case PF_8R8G8B:
662 /* fall through */
663 case PF_8R8G8B24:
664 return PACK_8R8G8B( r, g, b );
665 case PF_5R6G5B:
666 return PACK_5R6G5B( r, g, b );
667 case PF_Dither_True:
668 /* fall through */
669 case PF_Dither_5R6G5B:
670 {
671 unsigned long p;
672 PACK_TRUEDITHER(p, 1, 0, r, g, b);
673 return p;
674 }
675 default:
676 _mesa_problem(ctx, "Bad pixel format in xmesa_color_to_pixel");
677 }
678 return 0;
679 }
680
681
682 #define NUM_VISUAL_TYPES 6
683
684 /**
685 * Convert an X visual type to a GLX visual type.
686 *
687 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.)
688 * to be converted.
689 * \return If \c visualType is a valid X visual type, a GLX visual type will
690 * be returned. Otherwise \c GLX_NONE will be returned.
691 *
692 * \note
693 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the
694 * DRI CVS tree.
695 */
696 static GLint
697 xmesa_convert_from_x_visual_type( int visualType )
698 {
699 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = {
700 GLX_STATIC_GRAY, GLX_GRAY_SCALE,
701 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR,
702 GLX_TRUE_COLOR, GLX_DIRECT_COLOR
703 };
704
705 return ( (unsigned) visualType < NUM_VISUAL_TYPES )
706 ? glx_visual_types[ visualType ] : GLX_NONE;
707 }
708
709
710 /**********************************************************************/
711 /***** Public Functions *****/
712 /**********************************************************************/
713
714
715 /*
716 * Create a new X/Mesa visual.
717 * Input: display - X11 display
718 * visinfo - an XVisualInfo pointer
719 * rgb_flag - GL_TRUE = RGB mode,
720 * GL_FALSE = color index mode
721 * alpha_flag - alpha buffer requested?
722 * db_flag - GL_TRUE = double-buffered,
723 * GL_FALSE = single buffered
724 * stereo_flag - stereo visual?
725 * ximage_flag - GL_TRUE = use an XImage for back buffer,
726 * GL_FALSE = use an off-screen pixmap for back buffer
727 * depth_size - requested bits/depth values, or zero
728 * stencil_size - requested bits/stencil values, or zero
729 * accum_red_size - requested bits/red accum values, or zero
730 * accum_green_size - requested bits/green accum values, or zero
731 * accum_blue_size - requested bits/blue accum values, or zero
732 * accum_alpha_size - requested bits/alpha accum values, or zero
733 * num_samples - number of samples/pixel if multisampling, or zero
734 * level - visual level, usually 0
735 * visualCaveat - ala the GLX extension, usually GLX_NONE
736 * Return; a new XMesaVisual or 0 if error.
737 */
738 PUBLIC
739 XMesaVisual XMesaCreateVisual( XMesaDisplay *display,
740 XMesaVisualInfo visinfo,
741 GLboolean rgb_flag,
742 GLboolean alpha_flag,
743 GLboolean db_flag,
744 GLboolean stereo_flag,
745 GLboolean ximage_flag,
746 GLint depth_size,
747 GLint stencil_size,
748 GLint accum_red_size,
749 GLint accum_green_size,
750 GLint accum_blue_size,
751 GLint accum_alpha_size,
752 GLint num_samples,
753 GLint level,
754 GLint visualCaveat )
755 {
756 char *gamma;
757 XMesaVisual v;
758 GLint red_bits, green_bits, blue_bits, alpha_bits;
759
760 /* For debugging only */
761 if (_mesa_getenv("MESA_XSYNC")) {
762 /* This makes debugging X easier.
763 * In your debugger, set a breakpoint on _XError to stop when an
764 * X protocol error is generated.
765 */
766 XSynchronize( display, 1 );
767 }
768
769 /* Color-index rendering not supported. */
770 if (!rgb_flag)
771 return NULL;
772
773 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual);
774 if (!v) {
775 return NULL;
776 }
777
778 v->display = display;
779
780 /* Save a copy of the XVisualInfo struct because the user may Xfree()
781 * the struct but we may need some of the information contained in it
782 * at a later time.
783 */
784 v->visinfo = (XVisualInfo *) malloc(sizeof(*visinfo));
785 if(!v->visinfo) {
786 free(v);
787 return NULL;
788 }
789 memcpy(v->visinfo, visinfo, sizeof(*visinfo));
790
791 /* check for MESA_GAMMA environment variable */
792 gamma = _mesa_getenv("MESA_GAMMA");
793 if (gamma) {
794 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0;
795 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma );
796 if (v->RedGamma<=0.0) v->RedGamma = 1.0;
797 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma;
798 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma;
799 }
800 else {
801 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0;
802 }
803
804 v->ximage_flag = ximage_flag;
805
806 v->mesa_visual.redMask = visinfo->red_mask;
807 v->mesa_visual.greenMask = visinfo->green_mask;
808 v->mesa_visual.blueMask = visinfo->blue_mask;
809 v->visualID = visinfo->visualid;
810 v->screen = visinfo->screen;
811
812 #if !(defined(__cplusplus) || defined(c_plusplus))
813 v->visualType = xmesa_convert_from_x_visual_type(visinfo->class);
814 #else
815 v->visualType = xmesa_convert_from_x_visual_type(visinfo->c_class);
816 #endif
817
818 v->mesa_visual.visualRating = visualCaveat;
819
820 if (alpha_flag)
821 v->mesa_visual.alphaBits = 8;
822
823 (void) initialize_visual_and_buffer( v, NULL, 0, 0 );
824
825 {
826 const int xclass = v->visualType;
827 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
828 red_bits = _mesa_bitcount(GET_REDMASK(v));
829 green_bits = _mesa_bitcount(GET_GREENMASK(v));
830 blue_bits = _mesa_bitcount(GET_BLUEMASK(v));
831 }
832 else {
833 /* this is an approximation */
834 int depth;
835 depth = GET_VISUAL_DEPTH(v);
836 red_bits = depth / 3;
837 depth -= red_bits;
838 green_bits = depth / 2;
839 depth -= green_bits;
840 blue_bits = depth;
841 alpha_bits = 0;
842 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) );
843 }
844 alpha_bits = v->mesa_visual.alphaBits;
845 }
846
847 _mesa_initialize_visual( &v->mesa_visual,
848 db_flag, stereo_flag,
849 red_bits, green_bits,
850 blue_bits, alpha_bits,
851 depth_size,
852 stencil_size,
853 accum_red_size, accum_green_size,
854 accum_blue_size, accum_alpha_size,
855 0 );
856
857 /* XXX minor hack */
858 v->mesa_visual.level = level;
859 return v;
860 }
861
862
863 PUBLIC
864 void XMesaDestroyVisual( XMesaVisual v )
865 {
866 free(v->visinfo);
867 free(v);
868 }
869
870
871
872 /**
873 * Create a new XMesaContext.
874 * \param v the XMesaVisual
875 * \param share_list another XMesaContext with which to share display
876 * lists or NULL if no sharing is wanted.
877 * \return an XMesaContext or NULL if error.
878 */
879 PUBLIC
880 XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list )
881 {
882 static GLboolean firstTime = GL_TRUE;
883 XMesaContext c;
884 struct gl_context *mesaCtx;
885 struct dd_function_table functions;
886 TNLcontext *tnl;
887
888 if (firstTime) {
889 _glthread_INIT_MUTEX(_xmesa_lock);
890 firstTime = GL_FALSE;
891 }
892
893 /* Note: the XMesaContext contains a Mesa struct gl_context struct (inheritance) */
894 c = (XMesaContext) CALLOC_STRUCT(xmesa_context);
895 if (!c)
896 return NULL;
897
898 mesaCtx = &(c->mesa);
899
900 /* initialize with default driver functions, then plug in XMesa funcs */
901 _mesa_init_driver_functions(&functions);
902 xmesa_init_driver_functions(v, &functions);
903 if (!_mesa_initialize_context(mesaCtx, API_OPENGL, &v->mesa_visual,
904 share_list ? &(share_list->mesa) : (struct gl_context *) NULL,
905 &functions, (void *) c)) {
906 free(c);
907 return NULL;
908 }
909
910 /* Enable this to exercise fixed function -> shader translation
911 * with software rendering.
912 */
913 if (0) {
914 mesaCtx->VertexProgram._MaintainTnlProgram = GL_TRUE;
915 mesaCtx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
916 }
917
918 _mesa_enable_sw_extensions(mesaCtx);
919 _mesa_enable_1_3_extensions(mesaCtx);
920 _mesa_enable_1_4_extensions(mesaCtx);
921 _mesa_enable_1_5_extensions(mesaCtx);
922 _mesa_enable_2_0_extensions(mesaCtx);
923 _mesa_enable_2_1_extensions(mesaCtx);
924 if (mesaCtx->Mesa_DXTn) {
925 _mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc");
926 _mesa_enable_extension(mesaCtx, "GL_S3_s3tc");
927 }
928 _mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1");
929 #if ENABLE_EXT_timer_query
930 _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query");
931 #endif
932
933
934 /* finish up xmesa context initializations */
935 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE;
936 c->xm_visual = v;
937 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */
938 c->display = v->display;
939 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */
940
941 /* Initialize the software rasterizer and helper modules.
942 */
943 if (!_swrast_CreateContext( mesaCtx ) ||
944 !_vbo_CreateContext( mesaCtx ) ||
945 !_tnl_CreateContext( mesaCtx ) ||
946 !_swsetup_CreateContext( mesaCtx )) {
947 _mesa_free_context_data(&c->mesa);
948 free(c);
949 return NULL;
950 }
951
952 /* tnl setup */
953 tnl = TNL_CONTEXT(mesaCtx);
954 tnl->Driver.RunPipeline = _tnl_run_pipeline;
955 /* swrast setup */
956 xmesa_register_swrast_functions( mesaCtx );
957 _swsetup_Wakeup(mesaCtx);
958
959 _mesa_meta_init(mesaCtx);
960
961 return c;
962 }
963
964
965
966 PUBLIC
967 void XMesaDestroyContext( XMesaContext c )
968 {
969 struct gl_context *mesaCtx = &c->mesa;
970
971 _mesa_meta_free( mesaCtx );
972
973 _swsetup_DestroyContext( mesaCtx );
974 _swrast_DestroyContext( mesaCtx );
975 _tnl_DestroyContext( mesaCtx );
976 _vbo_DestroyContext( mesaCtx );
977 _mesa_free_context_data( mesaCtx );
978 free( c );
979 }
980
981
982
983 /**
984 * Private function for creating an XMesaBuffer which corresponds to an
985 * X window or pixmap.
986 * \param v the window's XMesaVisual
987 * \param w the window we're wrapping
988 * \return new XMesaBuffer or NULL if error
989 */
990 PUBLIC XMesaBuffer
991 XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w)
992 {
993 XWindowAttributes attr;
994 XMesaBuffer b;
995 XMesaColormap cmap;
996 int depth;
997
998 assert(v);
999 assert(w);
1000
1001 /* Check that window depth matches visual depth */
1002 XGetWindowAttributes( v->display, w, &attr );
1003 depth = attr.depth;
1004 if (GET_VISUAL_DEPTH(v) != depth) {
1005 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
1006 GET_VISUAL_DEPTH(v), depth);
1007 return NULL;
1008 }
1009
1010 /* Find colormap */
1011 if (attr.colormap) {
1012 cmap = attr.colormap;
1013 }
1014 else {
1015 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w);
1016 /* this is weird, a window w/out a colormap!? */
1017 /* OK, let's just allocate a new one and hope for the best */
1018 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone);
1019 }
1020
1021 b = create_xmesa_buffer((XMesaDrawable) w, WINDOW, v, cmap);
1022 if (!b)
1023 return NULL;
1024
1025 if (!initialize_visual_and_buffer( v, b, (XMesaDrawable) w, cmap )) {
1026 xmesa_free_buffer(b);
1027 return NULL;
1028 }
1029
1030 return b;
1031 }
1032
1033
1034
1035 /**
1036 * Create a new XMesaBuffer from an X pixmap.
1037 *
1038 * \param v the XMesaVisual
1039 * \param p the pixmap
1040 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or
1041 * \c GLX_DIRECT_COLOR visual for the pixmap
1042 * \returns new XMesaBuffer or NULL if error
1043 */
1044 PUBLIC XMesaBuffer
1045 XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap)
1046 {
1047 XMesaBuffer b;
1048
1049 assert(v);
1050
1051 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap);
1052 if (!b)
1053 return NULL;
1054
1055 if (!initialize_visual_and_buffer(v, b, (XMesaDrawable) p, cmap)) {
1056 xmesa_free_buffer(b);
1057 return NULL;
1058 }
1059
1060 return b;
1061 }
1062
1063
1064 /**
1065 * For GLX_EXT_texture_from_pixmap
1066 */
1067 XMesaBuffer
1068 XMesaCreatePixmapTextureBuffer(XMesaVisual v, XMesaPixmap p,
1069 XMesaColormap cmap,
1070 int format, int target, int mipmap)
1071 {
1072 GET_CURRENT_CONTEXT(ctx);
1073 XMesaBuffer b;
1074 GLuint width, height;
1075
1076 assert(v);
1077
1078 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap);
1079 if (!b)
1080 return NULL;
1081
1082 /* get pixmap size, update framebuffer/renderbuffer dims */
1083 xmesa_get_window_size(v->display, b, &width, &height);
1084 _mesa_resize_framebuffer(NULL, &(b->mesa_buffer), width, height);
1085
1086 if (target == 0) {
1087 /* examine dims */
1088 if (ctx->Extensions.ARB_texture_non_power_of_two) {
1089 target = GLX_TEXTURE_2D_EXT;
1090 }
1091 else if ( _mesa_bitcount(width) == 1
1092 && _mesa_bitcount(height) == 1) {
1093 /* power of two size */
1094 if (height == 1) {
1095 target = GLX_TEXTURE_1D_EXT;
1096 }
1097 else {
1098 target = GLX_TEXTURE_2D_EXT;
1099 }
1100 }
1101 else if (ctx->Extensions.NV_texture_rectangle) {
1102 target = GLX_TEXTURE_RECTANGLE_EXT;
1103 }
1104 else {
1105 /* non power of two textures not supported */
1106 XMesaDestroyBuffer(b);
1107 return 0;
1108 }
1109 }
1110
1111 b->TextureTarget = target;
1112 b->TextureFormat = format;
1113 b->TextureMipmap = mipmap;
1114
1115 if (!initialize_visual_and_buffer(v, b, (XMesaDrawable) p, cmap)) {
1116 xmesa_free_buffer(b);
1117 return NULL;
1118 }
1119
1120 return b;
1121 }
1122
1123
1124
1125 XMesaBuffer
1126 XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap,
1127 unsigned int width, unsigned int height)
1128 {
1129 XMesaWindow root;
1130 XMesaDrawable drawable; /* X Pixmap Drawable */
1131 XMesaBuffer b;
1132
1133 /* allocate pixmap for front buffer */
1134 root = RootWindow( v->display, v->visinfo->screen );
1135 drawable = XCreatePixmap(v->display, root, width, height,
1136 v->visinfo->depth);
1137 if (!drawable)
1138 return NULL;
1139
1140 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap);
1141 if (!b)
1142 return NULL;
1143
1144 if (!initialize_visual_and_buffer(v, b, drawable, cmap)) {
1145 xmesa_free_buffer(b);
1146 return NULL;
1147 }
1148
1149 return b;
1150 }
1151
1152
1153
1154 /*
1155 * Deallocate an XMesaBuffer structure and all related info.
1156 */
1157 PUBLIC void
1158 XMesaDestroyBuffer(XMesaBuffer b)
1159 {
1160 xmesa_free_buffer(b);
1161 }
1162
1163
1164 /**
1165 * Query the current window size and update the corresponding struct gl_framebuffer
1166 * and all attached renderbuffers.
1167 * Called when:
1168 * 1. the first time a buffer is bound to a context.
1169 * 2. from glViewport to poll for window size changes
1170 * 3. from the XMesaResizeBuffers() API function.
1171 * Note: it's possible (and legal) for xmctx to be NULL. That can happen
1172 * when resizing a buffer when no rendering context is bound.
1173 */
1174 void
1175 xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer)
1176 {
1177 GLuint width, height;
1178 xmesa_get_window_size(drawBuffer->display, drawBuffer, &width, &height);
1179 if (drawBuffer->mesa_buffer.Width != width ||
1180 drawBuffer->mesa_buffer.Height != height) {
1181 struct gl_context *ctx = xmctx ? &xmctx->mesa : NULL;
1182 _mesa_resize_framebuffer(ctx, &(drawBuffer->mesa_buffer), width, height);
1183 }
1184 drawBuffer->mesa_buffer.Initialized = GL_TRUE; /* XXX TEMPORARY? */
1185 }
1186
1187
1188 /*
1189 * Bind buffer b to context c and make c the current rendering context.
1190 */
1191 GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b )
1192 {
1193 return XMesaMakeCurrent2( c, b, b );
1194 }
1195
1196
1197 /*
1198 * Bind buffer b to context c and make c the current rendering context.
1199 */
1200 PUBLIC
1201 GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer,
1202 XMesaBuffer readBuffer )
1203 {
1204 if (c) {
1205 if (!drawBuffer || !readBuffer)
1206 return GL_FALSE; /* must specify buffers! */
1207
1208 if (&(c->mesa) == _mesa_get_current_context()
1209 && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer
1210 && c->mesa.ReadBuffer == &readBuffer->mesa_buffer
1211 && XMESA_BUFFER(c->mesa.DrawBuffer)->wasCurrent) {
1212 /* same context and buffer, do nothing */
1213 return GL_TRUE;
1214 }
1215
1216 c->xm_buffer = drawBuffer;
1217
1218 /* Call this periodically to detect when the user has begun using
1219 * GL rendering from multiple threads.
1220 */
1221 _glapi_check_multithread();
1222
1223 xmesa_check_and_update_buffer_size(c, drawBuffer);
1224 if (readBuffer != drawBuffer)
1225 xmesa_check_and_update_buffer_size(c, readBuffer);
1226
1227 _mesa_make_current(&(c->mesa),
1228 &drawBuffer->mesa_buffer,
1229 &readBuffer->mesa_buffer);
1230
1231 /*
1232 * Must recompute and set these pixel values because colormap
1233 * can be different for different windows.
1234 */
1235 c->clearpixel = xmesa_color_to_pixel( &c->mesa,
1236 c->clearcolor[0],
1237 c->clearcolor[1],
1238 c->clearcolor[2],
1239 c->clearcolor[3],
1240 c->xm_visual->undithered_pf);
1241 XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel);
1242
1243 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */
1244 drawBuffer->wasCurrent = GL_TRUE;
1245 }
1246 else {
1247 /* Detach */
1248 _mesa_make_current( NULL, NULL, NULL );
1249 }
1250 return GL_TRUE;
1251 }
1252
1253
1254 /*
1255 * Unbind the context c from its buffer.
1256 */
1257 GLboolean XMesaUnbindContext( XMesaContext c )
1258 {
1259 /* A no-op for XFree86 integration purposes */
1260 return GL_TRUE;
1261 }
1262
1263
1264 XMesaContext XMesaGetCurrentContext( void )
1265 {
1266 GET_CURRENT_CONTEXT(ctx);
1267 if (ctx) {
1268 XMesaContext xmesa = XMESA_CONTEXT(ctx);
1269 return xmesa;
1270 }
1271 else {
1272 return 0;
1273 }
1274 }
1275
1276
1277 XMesaBuffer XMesaGetCurrentBuffer( void )
1278 {
1279 GET_CURRENT_CONTEXT(ctx);
1280 if (ctx) {
1281 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
1282 return xmbuf;
1283 }
1284 else {
1285 return 0;
1286 }
1287 }
1288
1289
1290 /* New in Mesa 3.1 */
1291 XMesaBuffer XMesaGetCurrentReadBuffer( void )
1292 {
1293 GET_CURRENT_CONTEXT(ctx);
1294 if (ctx) {
1295 return XMESA_BUFFER(ctx->ReadBuffer);
1296 }
1297 else {
1298 return 0;
1299 }
1300 }
1301
1302
1303
1304 GLboolean XMesaSetFXmode( GLint mode )
1305 {
1306 (void) mode;
1307 return GL_FALSE;
1308 }
1309
1310
1311
1312 /*
1313 * Copy the back buffer to the front buffer. If there's no back buffer
1314 * this is a no-op.
1315 */
1316 PUBLIC
1317 void XMesaSwapBuffers( XMesaBuffer b )
1318 {
1319 GET_CURRENT_CONTEXT(ctx);
1320
1321 if (!b->backxrb) {
1322 /* single buffered */
1323 return;
1324 }
1325
1326 /* If we're swapping the buffer associated with the current context
1327 * we have to flush any pending rendering commands first.
1328 */
1329 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer))
1330 _mesa_notifySwapBuffers(ctx);
1331
1332 if (b->db_mode) {
1333 if (b->backxrb->ximage) {
1334 /* Copy Ximage (back buf) from client memory to server window */
1335 #if defined(USE_XSHM)
1336 if (b->shm) {
1337 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
1338 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable,
1339 b->swapgc,
1340 b->backxrb->ximage, 0, 0,
1341 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height,
1342 False );
1343 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
1344 }
1345 else
1346 #endif
1347 {
1348 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
1349 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable,
1350 b->swapgc,
1351 b->backxrb->ximage, 0, 0,
1352 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height );
1353 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
1354 }
1355 }
1356 else if (b->backxrb->pixmap) {
1357 /* Copy pixmap (back buf) to window (front buf) on server */
1358 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
1359 XMesaCopyArea( b->xm_visual->display,
1360 b->backxrb->pixmap, /* source drawable */
1361 b->frontxrb->drawable, /* dest. drawable */
1362 b->swapgc,
1363 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height,
1364 0, 0 /* dest region */
1365 );
1366 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
1367 }
1368 }
1369 XSync( b->xm_visual->display, False );
1370 }
1371
1372
1373
1374 /*
1375 * Copy sub-region of back buffer to front buffer
1376 */
1377 void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height )
1378 {
1379 GET_CURRENT_CONTEXT(ctx);
1380
1381 /* If we're swapping the buffer associated with the current context
1382 * we have to flush any pending rendering commands first.
1383 */
1384 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer))
1385 _mesa_notifySwapBuffers(ctx);
1386
1387 if (!b->backxrb) {
1388 /* single buffered */
1389 return;
1390 }
1391
1392 if (b->db_mode) {
1393 int yTop = b->mesa_buffer.Height - y - height;
1394 if (b->backxrb->ximage) {
1395 /* Copy Ximage from host's memory to server's window */
1396 #if defined(USE_XSHM)
1397 if (b->shm) {
1398 /* XXX assuming width and height aren't too large! */
1399 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable,
1400 b->swapgc,
1401 b->backxrb->ximage, x, yTop,
1402 x, yTop, width, height, False );
1403 /* wait for finished event??? */
1404 }
1405 else
1406 #endif
1407 {
1408 /* XXX assuming width and height aren't too large! */
1409 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable,
1410 b->swapgc,
1411 b->backxrb->ximage, x, yTop,
1412 x, yTop, width, height );
1413 }
1414 }
1415 else {
1416 /* Copy pixmap to window on server */
1417 XMesaCopyArea( b->xm_visual->display,
1418 b->backxrb->pixmap, /* source drawable */
1419 b->frontxrb->drawable, /* dest. drawable */
1420 b->swapgc,
1421 x, yTop, width, height, /* source region */
1422 x, yTop /* dest region */
1423 );
1424 }
1425 }
1426 }
1427
1428
1429 /*
1430 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function
1431 * is a way to get "under the hood" of X/Mesa so one can manipulate the
1432 * back buffer directly.
1433 * Output: pixmap - pointer to back buffer's Pixmap, or 0
1434 * ximage - pointer to back buffer's XImage, or NULL
1435 * Return: GL_TRUE = context is double buffered
1436 * GL_FALSE = context is single buffered
1437 */
1438 GLboolean XMesaGetBackBuffer( XMesaBuffer b,
1439 XMesaPixmap *pixmap,
1440 XMesaImage **ximage )
1441 {
1442 if (b->db_mode) {
1443 if (pixmap)
1444 *pixmap = b->backxrb->pixmap;
1445 if (ximage)
1446 *ximage = b->backxrb->ximage;
1447 return GL_TRUE;
1448 }
1449 else {
1450 *pixmap = 0;
1451 *ximage = NULL;
1452 return GL_FALSE;
1453 }
1454 }
1455
1456
1457 /*
1458 * Return the depth buffer associated with an XMesaBuffer.
1459 * Input: b - the XMesa buffer handle
1460 * Output: width, height - size of buffer in pixels
1461 * bytesPerValue - bytes per depth value (2 or 4)
1462 * buffer - pointer to depth buffer values
1463 * Return: GL_TRUE or GL_FALSE to indicate success or failure.
1464 */
1465 GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height,
1466 GLint *bytesPerValue, void **buffer )
1467 {
1468 struct gl_renderbuffer *rb
1469 = b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer;
1470 struct xmesa_renderbuffer *xrb = xmesa_renderbuffer(rb);
1471
1472 if (!xrb || !xrb->Base.Buffer) {
1473 *width = 0;
1474 *height = 0;
1475 *bytesPerValue = 0;
1476 *buffer = 0;
1477 return GL_FALSE;
1478 }
1479 else {
1480 *width = b->mesa_buffer.Width;
1481 *height = b->mesa_buffer.Height;
1482 *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16
1483 ? sizeof(GLushort) : sizeof(GLuint);
1484 *buffer = (void *) xrb->Base.Buffer;
1485 return GL_TRUE;
1486 }
1487 }
1488
1489
1490 void XMesaFlush( XMesaContext c )
1491 {
1492 if (c && c->xm_visual) {
1493 XSync( c->xm_visual->display, False );
1494 }
1495 }
1496
1497
1498
1499 const char *XMesaGetString( XMesaContext c, int name )
1500 {
1501 (void) c;
1502 if (name==XMESA_VERSION) {
1503 return "5.0";
1504 }
1505 else if (name==XMESA_EXTENSIONS) {
1506 return "";
1507 }
1508 else {
1509 return NULL;
1510 }
1511 }
1512
1513
1514
1515 XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d )
1516 {
1517 XMesaBuffer b;
1518 for (b=XMesaBufferList; b; b=b->Next) {
1519 if (b->frontxrb->drawable == d && b->display == dpy) {
1520 return b;
1521 }
1522 }
1523 return NULL;
1524 }
1525
1526
1527 /**
1528 * Free/destroy all XMesaBuffers associated with given display.
1529 */
1530 void xmesa_destroy_buffers_on_display(XMesaDisplay *dpy)
1531 {
1532 XMesaBuffer b, next;
1533 for (b = XMesaBufferList; b; b = next) {
1534 next = b->Next;
1535 if (b->display == dpy) {
1536 xmesa_free_buffer(b);
1537 }
1538 }
1539 }
1540
1541
1542 /*
1543 * Look for XMesaBuffers whose X window has been destroyed.
1544 * Deallocate any such XMesaBuffers.
1545 */
1546 void XMesaGarbageCollect( XMesaDisplay* dpy )
1547 {
1548 XMesaBuffer b, next;
1549 for (b=XMesaBufferList; b; b=next) {
1550 next = b->Next;
1551 if (b->display && b->display == dpy && b->frontxrb->drawable && b->type == WINDOW) {
1552 XSync(b->display, False);
1553 if (!window_exists( b->display, b->frontxrb->drawable )) {
1554 /* found a dead window, free the ancillary info */
1555 XMesaDestroyBuffer( b );
1556 }
1557 }
1558 }
1559 }
1560
1561
1562 unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y,
1563 GLfloat red, GLfloat green,
1564 GLfloat blue, GLfloat alpha )
1565 {
1566 GLint r = (GLint) (red * 255.0F);
1567 GLint g = (GLint) (green * 255.0F);
1568 GLint b = (GLint) (blue * 255.0F);
1569 GLint a = (GLint) (alpha * 255.0F);
1570
1571 switch (xmesa->pixelformat) {
1572 case PF_Truecolor:
1573 {
1574 unsigned long p;
1575 PACK_TRUECOLOR( p, r, g, b );
1576 return p;
1577 }
1578 case PF_8A8B8G8R:
1579 return PACK_8A8B8G8R( r, g, b, a );
1580 case PF_8A8R8G8B:
1581 return PACK_8A8R8G8B( r, g, b, a );
1582 case PF_8R8G8B:
1583 return PACK_8R8G8B( r, g, b );
1584 case PF_5R6G5B:
1585 return PACK_5R6G5B( r, g, b );
1586 case PF_Dither_5R6G5B:
1587 /* fall through */
1588 case PF_Dither_True:
1589 {
1590 unsigned long p;
1591 PACK_TRUEDITHER(p, x, y, r, g, b);
1592 return p;
1593 }
1594 default:
1595 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor");
1596 }
1597 return 0;
1598 }
1599
1600
1601 /*
1602 * This is typically called when the window size changes and we need
1603 * to reallocate the buffer's back/depth/stencil/accum buffers.
1604 */
1605 PUBLIC void
1606 XMesaResizeBuffers( XMesaBuffer b )
1607 {
1608 GET_CURRENT_CONTEXT(ctx);
1609 XMesaContext xmctx = XMESA_CONTEXT(ctx);
1610 if (!xmctx)
1611 return;
1612 xmesa_check_and_update_buffer_size(xmctx, b);
1613 }
1614
1615
1616 static GLint
1617 xbuffer_to_renderbuffer(int buffer)
1618 {
1619 assert(MAX_AUX_BUFFERS <= 4);
1620
1621 switch (buffer) {
1622 case GLX_FRONT_LEFT_EXT:
1623 return BUFFER_FRONT_LEFT;
1624 case GLX_FRONT_RIGHT_EXT:
1625 return BUFFER_FRONT_RIGHT;
1626 case GLX_BACK_LEFT_EXT:
1627 return BUFFER_BACK_LEFT;
1628 case GLX_BACK_RIGHT_EXT:
1629 return BUFFER_BACK_RIGHT;
1630 case GLX_AUX0_EXT:
1631 return BUFFER_AUX0;
1632 case GLX_AUX1_EXT:
1633 case GLX_AUX2_EXT:
1634 case GLX_AUX3_EXT:
1635 case GLX_AUX4_EXT:
1636 case GLX_AUX5_EXT:
1637 case GLX_AUX6_EXT:
1638 case GLX_AUX7_EXT:
1639 case GLX_AUX8_EXT:
1640 case GLX_AUX9_EXT:
1641 default:
1642 /* BadValue error */
1643 return -1;
1644 }
1645 }
1646
1647
1648 PUBLIC void
1649 XMesaBindTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer,
1650 const int *attrib_list)
1651 {
1652 #if 0
1653 GET_CURRENT_CONTEXT(ctx);
1654 const GLuint unit = ctx->Texture.CurrentUnit;
1655 struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
1656 struct gl_texture_object *texObj;
1657 #endif
1658 struct gl_renderbuffer *rb;
1659 struct xmesa_renderbuffer *xrb;
1660 GLint b;
1661 XMesaImage *img = NULL;
1662 GLboolean freeImg = GL_FALSE;
1663
1664 b = xbuffer_to_renderbuffer(buffer);
1665 if (b < 0)
1666 return;
1667
1668 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_NONE_EXT)
1669 return; /* BadMatch error */
1670
1671 rb = drawable->mesa_buffer.Attachment[b].Renderbuffer;
1672 if (!rb) {
1673 /* invalid buffer */
1674 return;
1675 }
1676 xrb = xmesa_renderbuffer(rb);
1677
1678 #if 0
1679 switch (drawable->TextureTarget) {
1680 case GLX_TEXTURE_1D_EXT:
1681 texObj = texUnit->CurrentTex[TEXTURE_1D_INDEX];
1682 break;
1683 case GLX_TEXTURE_2D_EXT:
1684 texObj = texUnit->CurrentTex[TEXTURE_2D_INDEX];
1685 break;
1686 case GLX_TEXTURE_RECTANGLE_EXT:
1687 texObj = texUnit->CurrentTex[TEXTURE_RECT_INDEX];
1688 break;
1689 default:
1690 return; /* BadMatch error */
1691 }
1692 #endif
1693
1694 /*
1695 * The following is a quick and simple way to implement
1696 * BindTexImage. The better way is to write some new FetchTexel()
1697 * functions which would extract texels from XImages. We'd still
1698 * need to use GetImage when texturing from a Pixmap (front buffer)
1699 * but texturing from a back buffer (XImage) would avoid an image
1700 * copy.
1701 */
1702
1703 /* get XImage */
1704 if (xrb->pixmap) {
1705 img = XMesaGetImage(dpy, xrb->pixmap, 0, 0, rb->Width, rb->Height, ~0L,
1706 ZPixmap);
1707 freeImg = GL_TRUE;
1708 }
1709 else if (xrb->ximage) {
1710 img = xrb->ximage;
1711 }
1712
1713 /* store the XImage as a new texture image */
1714 if (img) {
1715 GLenum format, type, intFormat;
1716 if (img->bits_per_pixel == 32) {
1717 format = GL_BGRA;
1718 type = GL_UNSIGNED_BYTE;
1719 intFormat = GL_RGBA;
1720 }
1721 else if (img->bits_per_pixel == 24) {
1722 format = GL_BGR;
1723 type = GL_UNSIGNED_BYTE;
1724 intFormat = GL_RGB;
1725 }
1726 else if (img->bits_per_pixel == 16) {
1727 format = GL_BGR;
1728 type = GL_UNSIGNED_SHORT_5_6_5;
1729 intFormat = GL_RGB;
1730 }
1731 else {
1732 _mesa_problem(NULL, "Unexpected XImage format in XMesaBindTexImage");
1733 return;
1734 }
1735 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGBA_EXT) {
1736 intFormat = GL_RGBA;
1737 }
1738 else if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGB_EXT) {
1739 intFormat = GL_RGB;
1740 }
1741
1742 _mesa_TexImage2D(GL_TEXTURE_2D, 0, intFormat, rb->Width, rb->Height, 0,
1743 format, type, img->data);
1744
1745 if (freeImg) {
1746 XMesaDestroyImage(img);
1747 }
1748 }
1749 }
1750
1751
1752
1753 PUBLIC void
1754 XMesaReleaseTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer)
1755 {
1756 const GLint b = xbuffer_to_renderbuffer(buffer);
1757 if (b < 0)
1758 return;
1759
1760 /* no-op for now */
1761 }
1762