projects / mesa.git / blob
? search:


681b81ac76209632d82f6db56915cbd1efeaf8b1
[mesa.git] / src / mesa / drivers / x11 / xm_api.c
1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * 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 <stdio.h>
66 #include "glxheader.h"
67 #include "xmesaP.h"
68 #include "main/api_exec.h"
69 #include "main/context.h"
70 #include "main/extensions.h"
71 #include "main/framebuffer.h"
72 #include "main/imports.h"
73 #include "main/macros.h"
74 #include "main/renderbuffer.h"
75 #include "main/teximage.h"
76 #include "main/version.h"
77 #include "main/vtxfmt.h"
78 #include "swrast/swrast.h"
79 #include "swrast/s_renderbuffer.h"
80 #include "swrast_setup/swrast_setup.h"
81 #include "vbo/vbo.h"
82 #include "tnl/tnl.h"
83 #include "tnl/t_context.h"
84 #include "tnl/t_pipeline.h"
85 #include "drivers/common/driverfuncs.h"
86 #include "drivers/common/meta.h"
87
88 /**
89 * Global X driver lock
90 */
91 mtx_t _xmesa_lock;
92
93
94
95 /**********************************************************************/
96 /***** X Utility Functions *****/
97 /**********************************************************************/
98
99
100 /**
101 * Return the host's byte order as LSBFirst or MSBFirst ala X.
102 */
103 static int host_byte_order( void )
104 {
105 int i = 1;
106 char *cptr = (char *) &i;
107 return (*cptr==1) ? LSBFirst : MSBFirst;
108 }
109
110
111 /**
112 * Check if the X Shared Memory extension is available.
113 * Return: 0 = not available
114 * 1 = shared XImage support available
115 * 2 = shared Pixmap support available also
116 */
117 static int check_for_xshm( XMesaDisplay *display )
118 {
119 #if defined(USE_XSHM)
120 int ignore;
121
122 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) {
123 /* Note: we're no longer calling XShmQueryVersion() here. It seems
124 * to be flakey (triggers a spurious X protocol error when we close
125 * one display connection and start using a new one. XShm has been
126 * around a long time and hasn't changed so if MIT_SHM is supported
127 * we assume we're good to go.
128 */
129 return 2;
130 }
131 else {
132 return 0;
133 }
134 #else
135 /* No XSHM support */
136 return 0;
137 #endif
138 }
139
140
141 /**
142 * Apply gamma correction to an intensity value in [0..max]. Return the
143 * new intensity value.
144 */
145 static GLint
146 gamma_adjust( GLfloat gamma, GLint value, GLint max )
147 {
148 if (gamma == 1.0) {
149 return value;
150 }
151 else {
152 double x = (double) value / (double) max;
153 return IROUND_POS((GLfloat) max * pow(x, 1.0F/gamma));
154 }
155 }
156
157
158
159 /**
160 * Return the true number of bits per pixel for XImages.
161 * For example, if we request a 24-bit deep visual we may actually need/get
162 * 32bpp XImages. This function returns the appropriate bpp.
163 * Input: dpy - the X display
164 * visinfo - desribes the visual to be used for XImages
165 * Return: true number of bits per pixel for XImages
166 */
167 static int
168 bits_per_pixel( XMesaVisual xmv )
169 {
170 XMesaDisplay *dpy = xmv->display;
171 XMesaVisualInfo visinfo = xmv->visinfo;
172 XMesaImage *img;
173 int bitsPerPixel;
174 /* Create a temporary XImage */
175 img = XCreateImage( dpy, visinfo->visual, visinfo->depth,
176 ZPixmap, 0, /*format, offset*/
177 malloc(8), /*data*/
178 1, 1, /*width, height*/
179 32, /*bitmap_pad*/
180 0 /*bytes_per_line*/
181 );
182 assert(img);
183 /* grab the bits/pixel value */
184 bitsPerPixel = img->bits_per_pixel;
185 /* free the XImage */
186 free( img->data );
187 img->data = NULL;
188 XMesaDestroyImage( img );
189 return bitsPerPixel;
190 }
191
192
193
194 /*
195 * Determine if a given X window ID is valid (window exists).
196 * Do this by calling XGetWindowAttributes() for the window and
197 * checking if we catch an X error.
198 * Input: dpy - the display
199 * win - the window to check for existance
200 * Return: GL_TRUE - window exists
201 * GL_FALSE - window doesn't exist
202 */
203 static GLboolean WindowExistsFlag;
204
205 static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr )
206 {
207 (void) dpy;
208 if (xerr->error_code == BadWindow) {
209 WindowExistsFlag = GL_FALSE;
210 }
211 return 0;
212 }
213
214 static GLboolean window_exists( XMesaDisplay *dpy, Window win )
215 {
216 XWindowAttributes wa;
217 int (*old_handler)( XMesaDisplay*, XErrorEvent* );
218 WindowExistsFlag = GL_TRUE;
219 old_handler = XSetErrorHandler(window_exists_err_handler);
220 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */
221 XSetErrorHandler(old_handler);
222 return WindowExistsFlag;
223 }
224
225 static Status
226 get_drawable_size( XMesaDisplay *dpy, Drawable d, GLuint *width, GLuint *height )
227 {
228 Window root;
229 Status stat;
230 int xpos, ypos;
231 unsigned int w, h, bw, depth;
232 stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth);
233 *width = w;
234 *height = h;
235 return stat;
236 }
237
238
239 /**
240 * Return the size of the window (or pixmap) that corresponds to the
241 * given XMesaBuffer.
242 * \param width returns width in pixels
243 * \param height returns height in pixels
244 */
245 void
246 xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b,
247 GLuint *width, GLuint *height)
248 {
249 Status stat;
250
251 mtx_lock(&_xmesa_lock);
252 XSync(b->xm_visual->display, 0); /* added for Chromium */
253 stat = get_drawable_size(dpy, b->frontxrb->pixmap, width, height);
254 mtx_unlock(&_xmesa_lock);
255
256 if (!stat) {
257 /* probably querying a window that's recently been destroyed */
258 _mesa_warning(NULL, "XGetGeometry failed!\n");
259 *width = *height = 1;
260 }
261 }
262
263
264
265 /**********************************************************************/
266 /***** Linked list of XMesaBuffers *****/
267 /**********************************************************************/
268
269 XMesaBuffer XMesaBufferList = NULL;
270
271
272 /**
273 * Allocate a new XMesaBuffer object which corresponds to the given drawable.
274 * Note that XMesaBuffer is derived from struct gl_framebuffer.
275 * The new XMesaBuffer will not have any size (Width=Height=0).
276 *
277 * \param d the corresponding X drawable (window or pixmap)
278 * \param type either WINDOW, PIXMAP or PBUFFER, describing d
279 * \param vis the buffer's visual
280 * \param cmap the window's colormap, if known.
281 * \return new XMesaBuffer or NULL if any problem
282 */
283 static XMesaBuffer
284 create_xmesa_buffer(XMesaDrawable d, BufferType type,
285 XMesaVisual vis, XMesaColormap cmap)
286 {
287 XMesaBuffer b;
288
289 assert(type == WINDOW || type == PIXMAP || type == PBUFFER);
290
291 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer);
292 if (!b)
293 return NULL;
294
295 b->display = vis->display;
296 b->xm_visual = vis;
297 b->type = type;
298 b->cmap = cmap;
299
300 _mesa_initialize_window_framebuffer(&b->mesa_buffer, &vis->mesa_visual);
301 b->mesa_buffer.Delete = xmesa_delete_framebuffer;
302
303 /*
304 * Front renderbuffer
305 */
306 b->frontxrb = xmesa_new_renderbuffer(NULL, 0, vis, GL_FALSE);
307 if (!b->frontxrb) {
308 free(b);
309 return NULL;
310 }
311 b->frontxrb->Parent = b;
312 b->frontxrb->drawable = d;
313 b->frontxrb->pixmap = (XMesaPixmap) d;
314 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_FRONT_LEFT,
315 &b->frontxrb->Base.Base);
316
317 /*
318 * Back renderbuffer
319 */
320 if (vis->mesa_visual.doubleBufferMode) {
321 b->backxrb = xmesa_new_renderbuffer(NULL, 0, vis, GL_TRUE);
322 if (!b->backxrb) {
323 /* XXX free front xrb too */
324 free(b);
325 return NULL;
326 }
327 b->backxrb->Parent = b;
328 /* determine back buffer implementation */
329 b->db_mode = vis->ximage_flag ? BACK_XIMAGE : BACK_PIXMAP;
330
331 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_BACK_LEFT,
332 &b->backxrb->Base.Base);
333 }
334
335 /*
336 * Other renderbuffer (depth, stencil, etc)
337 */
338 _swrast_add_soft_renderbuffers(&b->mesa_buffer,
339 GL_FALSE, /* color */
340 vis->mesa_visual.haveDepthBuffer,
341 vis->mesa_visual.haveStencilBuffer,
342 vis->mesa_visual.haveAccumBuffer,
343 GL_FALSE, /* software alpha buffer */
344 vis->mesa_visual.numAuxBuffers > 0 );
345
346 /* GLX_EXT_texture_from_pixmap */
347 b->TextureTarget = 0;
348 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT;
349 b->TextureMipmap = 0;
350
351 /* insert buffer into linked list */
352 b->Next = XMesaBufferList;
353 XMesaBufferList = b;
354
355 return b;
356 }
357
358
359 /**
360 * Find an XMesaBuffer by matching X display and colormap but NOT matching
361 * the notThis buffer.
362 */
363 XMesaBuffer
364 xmesa_find_buffer(XMesaDisplay *dpy, XMesaColormap cmap, XMesaBuffer notThis)
365 {
366 XMesaBuffer b;
367 for (b=XMesaBufferList; b; b=b->Next) {
368 if (b->display==dpy && b->cmap==cmap && b!=notThis) {
369 return b;
370 }
371 }
372 return NULL;
373 }
374
375
376 /**
377 * Remove buffer from linked list, delete if no longer referenced.
378 */
379 static void
380 xmesa_free_buffer(XMesaBuffer buffer)
381 {
382 XMesaBuffer prev = NULL, b;
383
384 for (b = XMesaBufferList; b; b = b->Next) {
385 if (b == buffer) {
386 struct gl_framebuffer *fb = &buffer->mesa_buffer;
387
388 /* unlink buffer from list */
389 if (prev)
390 prev->Next = buffer->Next;
391 else
392 XMesaBufferList = buffer->Next;
393
394 /* mark as delete pending */
395 fb->DeletePending = GL_TRUE;
396
397 /* Since the X window for the XMesaBuffer is going away, we don't
398 * want to dereference this pointer in the future.
399 */
400 b->frontxrb->drawable = 0;
401
402 /* Unreference. If count = zero we'll really delete the buffer */
403 _mesa_reference_framebuffer(&fb, NULL);
404
405 return;
406 }
407 /* continue search */
408 prev = b;
409 }
410 /* buffer not found in XMesaBufferList */
411 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n");
412 }
413
414
415
416
417 /**********************************************************************/
418 /***** Misc Private Functions *****/
419 /**********************************************************************/
420
421
422 /**
423 * Setup RGB rendering for a window with a True/DirectColor visual.
424 */
425 static void
426 setup_truecolor(XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap)
427 {
428 unsigned long rmask, gmask, bmask;
429 (void) buffer;
430 (void) cmap;
431
432 /* Compute red multiplier (mask) and bit shift */
433 v->rshift = 0;
434 rmask = GET_REDMASK(v);
435 while ((rmask & 1)==0) {
436 v->rshift++;
437 rmask = rmask >> 1;
438 }
439
440 /* Compute green multiplier (mask) and bit shift */
441 v->gshift = 0;
442 gmask = GET_GREENMASK(v);
443 while ((gmask & 1)==0) {
444 v->gshift++;
445 gmask = gmask >> 1;
446 }
447
448 /* Compute blue multiplier (mask) and bit shift */
449 v->bshift = 0;
450 bmask = GET_BLUEMASK(v);
451 while ((bmask & 1)==0) {
452 v->bshift++;
453 bmask = bmask >> 1;
454 }
455
456 /*
457 * Compute component-to-pixel lookup tables and dithering kernel
458 */
459 {
460 static GLubyte kernel[16] = {
461 0*16, 8*16, 2*16, 10*16,
462 12*16, 4*16, 14*16, 6*16,
463 3*16, 11*16, 1*16, 9*16,
464 15*16, 7*16, 13*16, 5*16,
465 };
466 GLint rBits = _mesa_bitcount(rmask);
467 GLint gBits = _mesa_bitcount(gmask);
468 GLint bBits = _mesa_bitcount(bmask);
469 GLint maxBits;
470 GLuint i;
471
472 /* convert pixel components in [0,_mask] to RGB values in [0,255] */
473 for (i=0; i<=rmask; i++)
474 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask);
475 for (i=0; i<=gmask; i++)
476 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask);
477 for (i=0; i<=bmask; i++)
478 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask);
479
480 /* convert RGB values from [0,255] to pixel components */
481
482 for (i=0;i<256;i++) {
483 GLint r = gamma_adjust(v->RedGamma, i, 255);
484 GLint g = gamma_adjust(v->GreenGamma, i, 255);
485 GLint b = gamma_adjust(v->BlueGamma, i, 255);
486 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift;
487 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift;
488 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift;
489 }
490 /* overflow protection */
491 for (i=256;i<512;i++) {
492 v->RtoPixel[i] = v->RtoPixel[255];
493 v->GtoPixel[i] = v->GtoPixel[255];
494 v->BtoPixel[i] = v->BtoPixel[255];
495 }
496
497 /* setup dithering kernel */
498 maxBits = rBits;
499 if (gBits > maxBits) maxBits = gBits;
500 if (bBits > maxBits) maxBits = bBits;
501 for (i=0;i<16;i++) {
502 v->Kernel[i] = kernel[i] >> maxBits;
503 }
504
505 v->undithered_pf = PF_Truecolor;
506 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor;
507 }
508
509 /*
510 * Now check for TrueColor visuals which we can optimize.
511 */
512 if ( GET_REDMASK(v) ==0x0000ff
513 && GET_GREENMASK(v)==0x00ff00
514 && GET_BLUEMASK(v) ==0xff0000
515 && CHECK_BYTE_ORDER(v)
516 && v->BitsPerPixel==32
517 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) {
518 /* common 32 bpp config used on SGI, Sun */
519 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; /* ABGR */
520 }
521 else if (GET_REDMASK(v) == 0xff0000
522 && GET_GREENMASK(v)== 0x00ff00
523 && GET_BLUEMASK(v) == 0x0000ff
524 && CHECK_BYTE_ORDER(v)
525 && v->RedGamma == 1.0 && v->GreenGamma == 1.0 && v->BlueGamma == 1.0){
526 if (v->BitsPerPixel==32) {
527 /* if 32 bpp, and visual indicates 8 bpp alpha channel */
528 if (GET_VISUAL_DEPTH(v) == 32 && v->mesa_visual.alphaBits == 8)
529 v->undithered_pf = v->dithered_pf = PF_8A8R8G8B; /* ARGB */
530 else
531 v->undithered_pf = v->dithered_pf = PF_8R8G8B; /* xRGB */
532 }
533 else if (v->BitsPerPixel == 24) {
534 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; /* RGB */
535 }
536 }
537 else if (GET_REDMASK(v) ==0xf800
538 && GET_GREENMASK(v)==0x07e0
539 && GET_BLUEMASK(v) ==0x001f
540 && CHECK_BYTE_ORDER(v)
541 && v->BitsPerPixel==16
542 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) {
543 /* 5-6-5 RGB */
544 v->undithered_pf = PF_5R6G5B;
545 v->dithered_pf = PF_Dither_5R6G5B;
546 }
547 }
548
549
550 /**
551 * When a context is bound for the first time, we can finally finish
552 * initializing the context's visual and buffer information.
553 * \param v the XMesaVisual to initialize
554 * \param b the XMesaBuffer to initialize (may be NULL)
555 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode
556 * \param window the window/pixmap we're rendering into
557 * \param cmap the colormap associated with the window/pixmap
558 * \return GL_TRUE=success, GL_FALSE=failure
559 */
560 static GLboolean
561 initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b,
562 XMesaDrawable window,
563 XMesaColormap cmap)
564 {
565 const int xclass = v->visualType;
566
567
568 assert(!b || b->xm_visual == v);
569
570 /* Save true bits/pixel */
571 v->BitsPerPixel = bits_per_pixel(v);
572 assert(v->BitsPerPixel > 0);
573
574 /* RGB WINDOW:
575 * We support RGB rendering into almost any kind of visual.
576 */
577 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
578 setup_truecolor( v, b, cmap );
579 }
580 else {
581 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual.\n");
582 return GL_FALSE;
583 }
584 v->mesa_visual.indexBits = 0;
585
586 if (getenv("MESA_NO_DITHER")) {
587 v->dithered_pf = v->undithered_pf;
588 }
589
590
591 /*
592 * If MESA_INFO env var is set print out some debugging info
593 * which can help Brian figure out what's going on when a user
594 * reports bugs.
595 */
596 if (getenv("MESA_INFO")) {
597 printf("X/Mesa visual = %p\n", (void *) v);
598 printf("X/Mesa dithered pf = %u\n", v->dithered_pf);
599 printf("X/Mesa undithered pf = %u\n", v->undithered_pf);
600 printf("X/Mesa level = %d\n", v->mesa_visual.level);
601 printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v));
602 printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel);
603 }
604
605 if (b && window) {
606 /* Do window-specific initializations */
607
608 /* these should have been set in create_xmesa_buffer */
609 assert(b->frontxrb->drawable == window);
610 assert(b->frontxrb->pixmap == (XMesaPixmap) window);
611
612 /* Setup for single/double buffering */
613 if (v->mesa_visual.doubleBufferMode) {
614 /* Double buffered */
615 b->shm = check_for_xshm( v->display );
616 }
617
618 /* X11 graphics contexts */
619 b->gc = XCreateGC( v->display, window, 0, NULL );
620 XMesaSetFunction( v->display, b->gc, GXcopy );
621
622 /* cleargc - for glClear() */
623 b->cleargc = XCreateGC( v->display, window, 0, NULL );
624 XMesaSetFunction( v->display, b->cleargc, GXcopy );
625
626 /*
627 * Don't generate Graphics Expose/NoExpose events in swapbuffers().
628 * Patch contributed by Michael Pichler May 15, 1995.
629 */
630 {
631 XGCValues gcvalues;
632 gcvalues.graphics_exposures = False;
633 b->swapgc = XCreateGC(v->display, window,
634 GCGraphicsExposures, &gcvalues);
635 }
636 XMesaSetFunction( v->display, b->swapgc, GXcopy );
637 }
638
639 return GL_TRUE;
640 }
641
642
643
644 /*
645 * Convert an RGBA color to a pixel value.
646 */
647 unsigned long
648 xmesa_color_to_pixel(struct gl_context *ctx,
649 GLubyte r, GLubyte g, GLubyte b, GLubyte a,
650 GLuint pixelFormat)
651 {
652 XMesaContext xmesa = XMESA_CONTEXT(ctx);
653 switch (pixelFormat) {
654 case PF_Truecolor:
655 {
656 unsigned long p;
657 PACK_TRUECOLOR( p, r, g, b );
658 return p;
659 }
660 case PF_8A8B8G8R:
661 return PACK_8A8B8G8R( r, g, b, a );
662 case PF_8A8R8G8B:
663 return PACK_8A8R8G8B( r, g, b, a );
664 case PF_8R8G8B:
665 /* fall through */
666 case PF_8R8G8B24:
667 return PACK_8R8G8B( r, g, b );
668 case PF_5R6G5B:
669 return PACK_5R6G5B( r, g, b );
670 case PF_Dither_True:
671 /* fall through */
672 case PF_Dither_5R6G5B:
673 {
674 unsigned long p;
675 PACK_TRUEDITHER(p, 1, 0, r, g, b);
676 return p;
677 }
678 default:
679 _mesa_problem(ctx, "Bad pixel format in xmesa_color_to_pixel");
680 }
681 return 0;
682 }
683
684
685 #define NUM_VISUAL_TYPES 6
686
687 /**
688 * Convert an X visual type to a GLX visual type.
689 *
690 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.)
691 * to be converted.
692 * \return If \c visualType is a valid X visual type, a GLX visual type will
693 * be returned. Otherwise \c GLX_NONE will be returned.
694 *
695 * \note
696 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the
697 * DRI CVS tree.
698 */
699 static GLint
700 xmesa_convert_from_x_visual_type( int visualType )
701 {
702 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = {
703 GLX_STATIC_GRAY, GLX_GRAY_SCALE,
704 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR,
705 GLX_TRUE_COLOR, GLX_DIRECT_COLOR
706 };
707
708 return ( (unsigned) visualType < NUM_VISUAL_TYPES )
709 ? glx_visual_types[ visualType ] : GLX_NONE;
710 }
711
712
713 /**********************************************************************/
714 /***** Public Functions *****/
715 /**********************************************************************/
716
717
718 /*
719 * Create a new X/Mesa visual.
720 * Input: display - X11 display
721 * visinfo - an XVisualInfo pointer
722 * rgb_flag - GL_TRUE = RGB mode,
723 * GL_FALSE = color index mode
724 * alpha_flag - alpha buffer requested?
725 * db_flag - GL_TRUE = double-buffered,
726 * GL_FALSE = single buffered
727 * stereo_flag - stereo visual?
728 * ximage_flag - GL_TRUE = use an XImage for back buffer,
729 * GL_FALSE = use an off-screen pixmap for back buffer
730 * depth_size - requested bits/depth values, or zero
731 * stencil_size - requested bits/stencil values, or zero
732 * accum_red_size - requested bits/red accum values, or zero
733 * accum_green_size - requested bits/green accum values, or zero
734 * accum_blue_size - requested bits/blue accum values, or zero
735 * accum_alpha_size - requested bits/alpha accum values, or zero
736 * num_samples - number of samples/pixel if multisampling, or zero
737 * level - visual level, usually 0
738 * visualCaveat - ala the GLX extension, usually GLX_NONE
739 * Return; a new XMesaVisual or 0 if error.
740 */
741 PUBLIC
742 XMesaVisual XMesaCreateVisual( XMesaDisplay *display,
743 XMesaVisualInfo visinfo,
744 GLboolean rgb_flag,
745 GLboolean alpha_flag,
746 GLboolean db_flag,
747 GLboolean stereo_flag,
748 GLboolean ximage_flag,
749 GLint depth_size,
750 GLint stencil_size,
751 GLint accum_red_size,
752 GLint accum_green_size,
753 GLint accum_blue_size,
754 GLint accum_alpha_size,
755 GLint num_samples,
756 GLint level,
757 GLint visualCaveat )
758 {
759 char *gamma;
760 XMesaVisual v;
761 GLint red_bits, green_bits, blue_bits, alpha_bits;
762
763 /* For debugging only */
764 if (getenv("MESA_XSYNC")) {
765 /* This makes debugging X easier.
766 * In your debugger, set a breakpoint on _XError to stop when an
767 * X protocol error is generated.
768 */
769 XSynchronize( display, 1 );
770 }
771
772 /* Color-index rendering not supported. */
773 if (!rgb_flag)
774 return NULL;
775
776 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual);
777 if (!v) {
778 return NULL;
779 }
780
781 v->display = display;
782
783 /* Save a copy of the XVisualInfo struct because the user may Xfree()
784 * the struct but we may need some of the information contained in it
785 * at a later time.
786 */
787 v->visinfo = malloc(sizeof(*visinfo));
788 if(!v->visinfo) {
789 free(v);
790 return NULL;
791 }
792 memcpy(v->visinfo, visinfo, sizeof(*visinfo));
793
794 /* check for MESA_GAMMA environment variable */
795 gamma = getenv("MESA_GAMMA");
796 if (gamma) {
797 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0;
798 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma );
799 if (v->RedGamma<=0.0) v->RedGamma = 1.0;
800 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma;
801 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma;
802 }
803 else {
804 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0;
805 }
806
807 v->ximage_flag = ximage_flag;
808
809 v->mesa_visual.redMask = visinfo->red_mask;
810 v->mesa_visual.greenMask = visinfo->green_mask;
811 v->mesa_visual.blueMask = visinfo->blue_mask;
812 v->visualID = visinfo->visualid;
813 v->screen = visinfo->screen;
814
815 #if !(defined(__cplusplus) || defined(c_plusplus))
816 v->visualType = xmesa_convert_from_x_visual_type(visinfo->class);
817 #else
818 v->visualType = xmesa_convert_from_x_visual_type(visinfo->c_class);
819 #endif
820
821 v->mesa_visual.visualRating = visualCaveat;
822
823 if (alpha_flag)
824 v->mesa_visual.alphaBits = 8;
825
826 (void) initialize_visual_and_buffer( v, NULL, 0, 0 );
827
828 {
829 const int xclass = v->visualType;
830 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
831 red_bits = _mesa_bitcount(GET_REDMASK(v));
832 green_bits = _mesa_bitcount(GET_GREENMASK(v));
833 blue_bits = _mesa_bitcount(GET_BLUEMASK(v));
834 }
835 else {
836 /* this is an approximation */
837 int depth;
838 depth = GET_VISUAL_DEPTH(v);
839 red_bits = depth / 3;
840 depth -= red_bits;
841 green_bits = depth / 2;
842 depth -= green_bits;
843 blue_bits = depth;
844 alpha_bits = 0;
845 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) );
846 }
847 alpha_bits = v->mesa_visual.alphaBits;
848 }
849
850 if (!_mesa_initialize_visual(&v->mesa_visual,
851 db_flag, stereo_flag,
852 red_bits, green_bits,
853 blue_bits, alpha_bits,
854 depth_size,
855 stencil_size,
856 accum_red_size, accum_green_size,
857 accum_blue_size, accum_alpha_size,
858 0)) {
859 free(v);
860 return NULL;
861 }
862
863 /* XXX minor hack */
864 v->mesa_visual.level = level;
865 return v;
866 }
867
868
869 PUBLIC
870 void XMesaDestroyVisual( XMesaVisual v )
871 {
872 free(v->visinfo);
873 free(v);
874 }
875
876
877
878 /**
879 * Create a new XMesaContext.
880 * \param v the XMesaVisual
881 * \param share_list another XMesaContext with which to share display
882 * lists or NULL if no sharing is wanted.
883 * \return an XMesaContext or NULL if error.
884 */
885 PUBLIC
886 XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list )
887 {
888 static GLboolean firstTime = GL_TRUE;
889 XMesaContext c;
890 struct gl_context *mesaCtx;
891 struct dd_function_table functions;
892 TNLcontext *tnl;
893
894 if (firstTime) {
895 mtx_init(&_xmesa_lock, mtx_plain);
896 firstTime = GL_FALSE;
897 }
898
899 /* Note: the XMesaContext contains a Mesa struct gl_context struct (inheritance) */
900 c = (XMesaContext) CALLOC_STRUCT(xmesa_context);
901 if (!c)
902 return NULL;
903
904 mesaCtx = &(c->mesa);
905
906 /* initialize with default driver functions, then plug in XMesa funcs */
907 _mesa_init_driver_functions(&functions);
908 xmesa_init_driver_functions(v, &functions);
909 if (!_mesa_initialize_context(mesaCtx, API_OPENGL_COMPAT, &v->mesa_visual,
910 share_list ? &(share_list->mesa) : (struct gl_context *) NULL,
911 &functions)) {
912 free(c);
913 return NULL;
914 }
915
916 /* Enable this to exercise fixed function -> shader translation
917 * with software rendering.
918 */
919 if (0) {
920 mesaCtx->VertexProgram._MaintainTnlProgram = GL_TRUE;
921 mesaCtx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
922 }
923
924 _mesa_enable_sw_extensions(mesaCtx);
925
926 #if ENABLE_EXT_timer_query
927 mesaCtx->Extensions.EXT_timer_query = GL_TRUE;
928 #endif
929
930
931 /* finish up xmesa context initializations */
932 c->direct = GL_TRUE;
933 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE;
934 c->xm_visual = v;
935 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */
936 c->display = v->display;
937 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */
938
939 /* Initialize the software rasterizer and helper modules.
940 */
941 if (!_swrast_CreateContext( mesaCtx ) ||
942 !_vbo_CreateContext( mesaCtx ) ||
943 !_tnl_CreateContext( mesaCtx ) ||
944 !_swsetup_CreateContext( mesaCtx )) {
945 _mesa_free_context_data(&c->mesa);
946 free(c);
947 return NULL;
948 }
949
950 /* tnl setup */
951 tnl = TNL_CONTEXT(mesaCtx);
952 tnl->Driver.RunPipeline = _tnl_run_pipeline;
953 /* swrast setup */
954 xmesa_register_swrast_functions( mesaCtx );
955 _swsetup_Wakeup(mesaCtx);
956
957 _mesa_meta_init(mesaCtx);
958
959 _mesa_compute_version(mesaCtx);
960
961 /* Exec table initialization requires the version to be computed */
962 _mesa_initialize_dispatch_tables(mesaCtx);
963 _mesa_initialize_vbo_vtxfmt(mesaCtx);
964
965 return c;
966 }
967
968
969
970 PUBLIC
971 void XMesaDestroyContext( XMesaContext c )
972 {
973 struct gl_context *mesaCtx = &c->mesa;
974
975 _mesa_meta_free( mesaCtx );
976
977 _swsetup_DestroyContext( mesaCtx );
978 _swrast_DestroyContext( mesaCtx );
979 _tnl_DestroyContext( mesaCtx );
980 _vbo_DestroyContext( mesaCtx );
981 _mesa_free_context_data( mesaCtx );
982 free( c );
983 }
984
985
986
987 /**
988 * Private function for creating an XMesaBuffer which corresponds to an
989 * X window or pixmap.
990 * \param v the window's XMesaVisual
991 * \param w the window we're wrapping
992 * \return new XMesaBuffer or NULL if error
993 */
994 PUBLIC XMesaBuffer
995 XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w)
996 {
997 XWindowAttributes attr;
998 XMesaBuffer b;
999 XMesaColormap cmap;
1000 int depth;
1001
1002 assert(v);
1003 assert(w);
1004
1005 /* Check that window depth matches visual depth */
1006 XGetWindowAttributes( v->display, w, &attr );
1007 depth = attr.depth;
1008 if (GET_VISUAL_DEPTH(v) != depth) {
1009 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
1010 GET_VISUAL_DEPTH(v), depth);
1011 return NULL;
1012 }
1013
1014 /* Find colormap */
1015 if (attr.colormap) {
1016 cmap = attr.colormap;
1017 }
1018 else {
1019 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w);
1020 /* this is weird, a window w/out a colormap!? */
1021 /* OK, let's just allocate a new one and hope for the best */
1022 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone);
1023 }
1024
1025 b = create_xmesa_buffer((XMesaDrawable) w, WINDOW, v, cmap);
1026 if (!b)
1027 return NULL;
1028
1029 if (!initialize_visual_and_buffer( v, b, (XMesaDrawable) w, cmap )) {
1030 xmesa_free_buffer(b);
1031 return NULL;
1032 }
1033
1034 return b;
1035 }
1036
1037
1038
1039 /**
1040 * Create a new XMesaBuffer from an X pixmap.
1041 *
1042 * \param v the XMesaVisual
1043 * \param p the pixmap
1044 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or
1045 * \c GLX_DIRECT_COLOR visual for the pixmap
1046 * \returns new XMesaBuffer or NULL if error
1047 */
1048 PUBLIC XMesaBuffer
1049 XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap)
1050 {
1051 XMesaBuffer b;
1052
1053 assert(v);
1054
1055 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap);
1056 if (!b)
1057 return NULL;
1058
1059 if (!initialize_visual_and_buffer(v, b, (XMesaDrawable) p, cmap)) {
1060 xmesa_free_buffer(b);
1061 return NULL;
1062 }
1063
1064 return b;
1065 }
1066
1067
1068 /**
1069 * For GLX_EXT_texture_from_pixmap
1070 */
1071 XMesaBuffer
1072 XMesaCreatePixmapTextureBuffer(XMesaVisual v, XMesaPixmap p,
1073 XMesaColormap cmap,
1074 int format, int target, int mipmap)
1075 {
1076 GET_CURRENT_CONTEXT(ctx);
1077 XMesaBuffer b;
1078 GLuint width, height;
1079
1080 assert(v);
1081
1082 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap);
1083 if (!b)
1084 return NULL;
1085
1086 /* get pixmap size, update framebuffer/renderbuffer dims */
1087 xmesa_get_window_size(v->display, b, &width, &height);
1088 _mesa_resize_framebuffer(NULL, &(b->mesa_buffer), width, height);
1089
1090 if (target == 0) {
1091 /* examine dims */
1092 if (ctx->Extensions.ARB_texture_non_power_of_two) {
1093 target = GLX_TEXTURE_2D_EXT;
1094 }
1095 else if ( _mesa_bitcount(width) == 1
1096 && _mesa_bitcount(height) == 1) {
1097 /* power of two size */
1098 if (height == 1) {
1099 target = GLX_TEXTURE_1D_EXT;
1100 }
1101 else {
1102 target = GLX_TEXTURE_2D_EXT;
1103 }
1104 }
1105 else if (ctx->Extensions.NV_texture_rectangle) {
1106 target = GLX_TEXTURE_RECTANGLE_EXT;
1107 }
1108 else {
1109 /* non power of two textures not supported */
1110 XMesaDestroyBuffer(b);
1111 return 0;
1112 }
1113 }
1114
1115 b->TextureTarget = target;
1116 b->TextureFormat = format;
1117 b->TextureMipmap = mipmap;
1118
1119 if (!initialize_visual_and_buffer(v, b, (XMesaDrawable) p, cmap)) {
1120 xmesa_free_buffer(b);
1121 return NULL;
1122 }
1123
1124 return b;
1125 }
1126
1127
1128
1129 XMesaBuffer
1130 XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap,
1131 unsigned int width, unsigned int height)
1132 {
1133 XMesaWindow root;
1134 XMesaDrawable drawable; /* X Pixmap Drawable */
1135 XMesaBuffer b;
1136
1137 /* allocate pixmap for front buffer */
1138 root = RootWindow( v->display, v->visinfo->screen );
1139 drawable = XCreatePixmap(v->display, root, width, height,
1140 v->visinfo->depth);
1141 if (!drawable)
1142 return NULL;
1143
1144 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap);
1145 if (!b)
1146 return NULL;
1147
1148 if (!initialize_visual_and_buffer(v, b, drawable, cmap)) {
1149 xmesa_free_buffer(b);
1150 return NULL;
1151 }
1152
1153 return b;
1154 }
1155
1156
1157
1158 /*
1159 * Deallocate an XMesaBuffer structure and all related info.
1160 */
1161 PUBLIC void
1162 XMesaDestroyBuffer(XMesaBuffer b)
1163 {
1164 xmesa_free_buffer(b);
1165 }
1166
1167
1168 /**
1169 * Query the current window size and update the corresponding struct gl_framebuffer
1170 * and all attached renderbuffers.
1171 * Called when:
1172 * 1. the first time a buffer is bound to a context.
1173 * 2. from glViewport to poll for window size changes
1174 * 3. from the XMesaResizeBuffers() API function.
1175 * Note: it's possible (and legal) for xmctx to be NULL. That can happen
1176 * when resizing a buffer when no rendering context is bound.
1177 */
1178 void
1179 xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer)
1180 {
1181 GLuint width, height;
1182 xmesa_get_window_size(drawBuffer->display, drawBuffer, &width, &height);
1183 if (drawBuffer->mesa_buffer.Width != width ||
1184 drawBuffer->mesa_buffer.Height != height) {
1185 struct gl_context *ctx = xmctx ? &xmctx->mesa : NULL;
1186 _mesa_resize_framebuffer(ctx, &(drawBuffer->mesa_buffer), width, height);
1187 }
1188 }
1189
1190
1191 /*
1192 * Bind buffer b to context c and make c the current rendering context.
1193 */
1194 GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b )
1195 {
1196 return XMesaMakeCurrent2( c, b, b );
1197 }
1198
1199
1200 /*
1201 * Bind buffer b to context c and make c the current rendering context.
1202 */
1203 PUBLIC
1204 GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer,
1205 XMesaBuffer readBuffer )
1206 {
1207 if (c) {
1208 if (!drawBuffer || !readBuffer)
1209 return GL_FALSE; /* must specify buffers! */
1210
1211 if (&(c->mesa) == _mesa_get_current_context()
1212 && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer
1213 && c->mesa.ReadBuffer == &readBuffer->mesa_buffer
1214 && XMESA_BUFFER(c->mesa.DrawBuffer)->wasCurrent) {
1215 /* same context and buffer, do nothing */
1216 return GL_TRUE;
1217 }
1218
1219 c->xm_buffer = drawBuffer;
1220
1221 /* Call this periodically to detect when the user has begun using
1222 * GL rendering from multiple threads.
1223 */
1224 _glapi_check_multithread();
1225
1226 xmesa_check_and_update_buffer_size(c, drawBuffer);
1227 if (readBuffer != drawBuffer)
1228 xmesa_check_and_update_buffer_size(c, readBuffer);
1229
1230 _mesa_make_current(&(c->mesa),
1231 &drawBuffer->mesa_buffer,
1232 &readBuffer->mesa_buffer);
1233
1234 /*
1235 * Must recompute and set these pixel values because colormap
1236 * can be different for different windows.
1237 */
1238 c->clearpixel = xmesa_color_to_pixel( &c->mesa,
1239 c->clearcolor[0],
1240 c->clearcolor[1],
1241 c->clearcolor[2],
1242 c->clearcolor[3],
1243 c->xm_visual->undithered_pf);
1244 XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel);
1245
1246 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */
1247 drawBuffer->wasCurrent = GL_TRUE;
1248 }
1249 else {
1250 /* Detach */
1251 _mesa_make_current( NULL, NULL, NULL );
1252 }
1253 return GL_TRUE;
1254 }
1255
1256
1257 /*
1258 * Unbind the context c from its buffer.
1259 */
1260 GLboolean XMesaUnbindContext( XMesaContext c )
1261 {
1262 /* A no-op for XFree86 integration purposes */
1263 return GL_TRUE;
1264 }
1265
1266
1267 XMesaContext XMesaGetCurrentContext( void )
1268 {
1269 GET_CURRENT_CONTEXT(ctx);
1270 if (ctx) {
1271 XMesaContext xmesa = XMESA_CONTEXT(ctx);
1272 return xmesa;
1273 }
1274 else {
1275 return 0;
1276 }
1277 }
1278
1279
1280 XMesaBuffer XMesaGetCurrentBuffer( void )
1281 {
1282 GET_CURRENT_CONTEXT(ctx);
1283 if (ctx) {
1284 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
1285 return xmbuf;
1286 }
1287 else {
1288 return 0;
1289 }
1290 }
1291
1292
1293 /* New in Mesa 3.1 */
1294 XMesaBuffer XMesaGetCurrentReadBuffer( void )
1295 {
1296 GET_CURRENT_CONTEXT(ctx);
1297 if (ctx) {
1298 return XMESA_BUFFER(ctx->ReadBuffer);
1299 }
1300 else {
1301 return 0;
1302 }
1303 }
1304
1305
1306
1307 GLboolean XMesaSetFXmode( GLint mode )
1308 {
1309 (void) mode;
1310 return GL_FALSE;
1311 }
1312
1313
1314
1315 /*
1316 * Copy the back buffer to the front buffer. If there's no back buffer
1317 * this is a no-op.
1318 */
1319 PUBLIC
1320 void XMesaSwapBuffers( XMesaBuffer b )
1321 {
1322 GET_CURRENT_CONTEXT(ctx);
1323
1324 if (!b->backxrb) {
1325 /* single buffered */
1326 return;
1327 }
1328
1329 /* If we're swapping the buffer associated with the current context
1330 * we have to flush any pending rendering commands first.
1331 */
1332 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer))
1333 _mesa_notifySwapBuffers(ctx);
1334
1335 if (b->db_mode) {
1336 if (b->backxrb->ximage) {
1337 /* Copy Ximage (back buf) from client memory to server window */
1338 #if defined(USE_XSHM)
1339 if (b->shm) {
1340 /*mtx_lock(&_xmesa_lock);*/
1341 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable,
1342 b->swapgc,
1343 b->backxrb->ximage, 0, 0,
1344 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height,
1345 False );
1346 /*mtx_unlock(&_xmesa_lock);*/
1347 }
1348 else
1349 #endif
1350 {
1351 /*mtx_lock(&_xmesa_lock);*/
1352 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable,
1353 b->swapgc,
1354 b->backxrb->ximage, 0, 0,
1355 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height );
1356 /*mtx_unlock(&_xmesa_lock);*/
1357 }
1358 }
1359 else if (b->backxrb->pixmap) {
1360 /* Copy pixmap (back buf) to window (front buf) on server */
1361 /*mtx_lock(&_xmesa_lock);*/
1362 XMesaCopyArea( b->xm_visual->display,
1363 b->backxrb->pixmap, /* source drawable */
1364 b->frontxrb->drawable, /* dest. drawable */
1365 b->swapgc,
1366 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height,
1367 0, 0 /* dest region */
1368 );
1369 /*mtx_unlock(&_xmesa_lock);*/
1370 }
1371 }
1372 XSync( b->xm_visual->display, False );
1373 }
1374
1375
1376
1377 /*
1378 * Copy sub-region of back buffer to front buffer
1379 */
1380 void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height )
1381 {
1382 GET_CURRENT_CONTEXT(ctx);
1383
1384 /* If we're swapping the buffer associated with the current context
1385 * we have to flush any pending rendering commands first.
1386 */
1387 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer))
1388 _mesa_notifySwapBuffers(ctx);
1389
1390 if (!b->backxrb) {
1391 /* single buffered */
1392 return;
1393 }
1394
1395 if (b->db_mode) {
1396 int yTop = b->mesa_buffer.Height - y - height;
1397 if (b->backxrb->ximage) {
1398 /* Copy Ximage from host's memory to server's window */
1399 #if defined(USE_XSHM)
1400 if (b->shm) {
1401 /* XXX assuming width and height aren't too large! */
1402 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable,
1403 b->swapgc,
1404 b->backxrb->ximage, x, yTop,
1405 x, yTop, width, height, False );
1406 /* wait for finished event??? */
1407 }
1408 else
1409 #endif
1410 {
1411 /* XXX assuming width and height aren't too large! */
1412 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable,
1413 b->swapgc,
1414 b->backxrb->ximage, x, yTop,
1415 x, yTop, width, height );
1416 }
1417 }
1418 else {
1419 /* Copy pixmap to window on server */
1420 XMesaCopyArea( b->xm_visual->display,
1421 b->backxrb->pixmap, /* source drawable */
1422 b->frontxrb->drawable, /* dest. drawable */
1423 b->swapgc,
1424 x, yTop, width, height, /* source region */
1425 x, yTop /* dest region */
1426 );
1427 }
1428 }
1429 }
1430
1431
1432 /*
1433 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function
1434 * is a way to get "under the hood" of X/Mesa so one can manipulate the
1435 * back buffer directly.
1436 * Output: pixmap - pointer to back buffer's Pixmap, or 0
1437 * ximage - pointer to back buffer's XImage, or NULL
1438 * Return: GL_TRUE = context is double buffered
1439 * GL_FALSE = context is single buffered
1440 */
1441 GLboolean XMesaGetBackBuffer( XMesaBuffer b,
1442 XMesaPixmap *pixmap,
1443 XMesaImage **ximage )
1444 {
1445 if (b->db_mode) {
1446 if (pixmap)
1447 *pixmap = b->backxrb->pixmap;
1448 if (ximage)
1449 *ximage = b->backxrb->ximage;
1450 return GL_TRUE;
1451 }
1452 else {
1453 *pixmap = 0;
1454 *ximage = NULL;
1455 return GL_FALSE;
1456 }
1457 }
1458
1459
1460 /*
1461 * Return the depth buffer associated with an XMesaBuffer.
1462 * Input: b - the XMesa buffer handle
1463 * Output: width, height - size of buffer in pixels
1464 * bytesPerValue - bytes per depth value (2 or 4)
1465 * buffer - pointer to depth buffer values
1466 * Return: GL_TRUE or GL_FALSE to indicate success or failure.
1467 */
1468 GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height,
1469 GLint *bytesPerValue, void **buffer )
1470 {
1471 struct gl_renderbuffer *rb
1472 = b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer;
1473 struct xmesa_renderbuffer *xrb = xmesa_renderbuffer(rb);
1474
1475 if (!xrb || !xrb->Base.Buffer) {
1476 *width = 0;
1477 *height = 0;
1478 *bytesPerValue = 0;
1479 *buffer = 0;
1480 return GL_FALSE;
1481 }
1482 else {
1483 *width = b->mesa_buffer.Width;
1484 *height = b->mesa_buffer.Height;
1485 *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16
1486 ? sizeof(GLushort) : sizeof(GLuint);
1487 *buffer = (void *) xrb->Base.Buffer;
1488 return GL_TRUE;
1489 }
1490 }
1491
1492
1493 void XMesaFlush( XMesaContext c )
1494 {
1495 if (c && c->xm_visual) {
1496 XSync( c->xm_visual->display, False );
1497 }
1498 }
1499
1500
1501
1502 const char *XMesaGetString( XMesaContext c, int name )
1503 {
1504 (void) c;
1505 if (name==XMESA_VERSION) {
1506 return "5.0";
1507 }
1508 else if (name==XMESA_EXTENSIONS) {
1509 return "";
1510 }
1511 else {
1512 return NULL;
1513 }
1514 }
1515
1516
1517
1518 XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d )
1519 {
1520 XMesaBuffer b;
1521 for (b=XMesaBufferList; b; b=b->Next) {
1522 if (b->frontxrb->drawable == d && b->display == dpy) {
1523 return b;
1524 }
1525 }
1526 return NULL;
1527 }
1528
1529
1530 /**
1531 * Free/destroy all XMesaBuffers associated with given display.
1532 */
1533 void xmesa_destroy_buffers_on_display(XMesaDisplay *dpy)
1534 {
1535 XMesaBuffer b, next;
1536 for (b = XMesaBufferList; b; b = next) {
1537 next = b->Next;
1538 if (b->display == dpy) {
1539 xmesa_free_buffer(b);
1540 }
1541 }
1542 }
1543
1544
1545 /*
1546 * Look for XMesaBuffers whose X window has been destroyed.
1547 * Deallocate any such XMesaBuffers.
1548 */
1549 void XMesaGarbageCollect( XMesaDisplay* dpy )
1550 {
1551 XMesaBuffer b, next;
1552 for (b=XMesaBufferList; b; b=next) {
1553 next = b->Next;
1554 if (b->display && b->display == dpy && b->frontxrb->drawable && b->type == WINDOW) {
1555 XSync(b->display, False);
1556 if (!window_exists( b->display, b->frontxrb->drawable )) {
1557 /* found a dead window, free the ancillary info */
1558 XMesaDestroyBuffer( b );
1559 }
1560 }
1561 }
1562 }
1563
1564
1565 unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y,
1566 GLfloat red, GLfloat green,
1567 GLfloat blue, GLfloat alpha )
1568 {
1569 GLint r = (GLint) (red * 255.0F);
1570 GLint g = (GLint) (green * 255.0F);
1571 GLint b = (GLint) (blue * 255.0F);
1572 GLint a = (GLint) (alpha * 255.0F);
1573
1574 switch (xmesa->pixelformat) {
1575 case PF_Truecolor:
1576 {
1577 unsigned long p;
1578 PACK_TRUECOLOR( p, r, g, b );
1579 return p;
1580 }
1581 case PF_8A8B8G8R:
1582 return PACK_8A8B8G8R( r, g, b, a );
1583 case PF_8A8R8G8B:
1584 return PACK_8A8R8G8B( r, g, b, a );
1585 case PF_8R8G8B:
1586 return PACK_8R8G8B( r, g, b );
1587 case PF_5R6G5B:
1588 return PACK_5R6G5B( r, g, b );
1589 case PF_Dither_5R6G5B:
1590 /* fall through */
1591 case PF_Dither_True:
1592 {
1593 unsigned long p;
1594 PACK_TRUEDITHER(p, x, y, r, g, b);
1595 return p;
1596 }
1597 default:
1598 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor");
1599 }
1600 return 0;
1601 }
1602
1603
1604 /*
1605 * This is typically called when the window size changes and we need
1606 * to reallocate the buffer's back/depth/stencil/accum buffers.
1607 */
1608 PUBLIC void
1609 XMesaResizeBuffers( XMesaBuffer b )
1610 {
1611 GET_CURRENT_CONTEXT(ctx);
1612 XMesaContext xmctx = XMESA_CONTEXT(ctx);
1613 if (!xmctx)
1614 return;
1615 xmesa_check_and_update_buffer_size(xmctx, b);
1616 }
1617
1618
1619 static GLint
1620 xbuffer_to_renderbuffer(int buffer)
1621 {
1622 assert(MAX_AUX_BUFFERS <= 4);
1623
1624 switch (buffer) {
1625 case GLX_FRONT_LEFT_EXT:
1626 return BUFFER_FRONT_LEFT;
1627 case GLX_FRONT_RIGHT_EXT:
1628 return BUFFER_FRONT_RIGHT;
1629 case GLX_BACK_LEFT_EXT:
1630 return BUFFER_BACK_LEFT;
1631 case GLX_BACK_RIGHT_EXT:
1632 return BUFFER_BACK_RIGHT;
1633 case GLX_AUX0_EXT:
1634 return BUFFER_AUX0;
1635 case GLX_AUX1_EXT:
1636 case GLX_AUX2_EXT:
1637 case GLX_AUX3_EXT:
1638 case GLX_AUX4_EXT:
1639 case GLX_AUX5_EXT:
1640 case GLX_AUX6_EXT:
1641 case GLX_AUX7_EXT:
1642 case GLX_AUX8_EXT:
1643 case GLX_AUX9_EXT:
1644 default:
1645 /* BadValue error */
1646 return -1;
1647 }
1648 }
1649
1650
1651 PUBLIC void
1652 XMesaBindTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer,
1653 const int *attrib_list)
1654 {
1655 #if 0
1656 GET_CURRENT_CONTEXT(ctx);
1657 const GLuint unit = ctx->Texture.CurrentUnit;
1658 struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
1659 struct gl_texture_object *texObj;
1660 #endif
1661 struct gl_renderbuffer *rb;
1662 struct xmesa_renderbuffer *xrb;
1663 GLint b;
1664 XMesaImage *img = NULL;
1665 GLboolean freeImg = GL_FALSE;
1666
1667 b = xbuffer_to_renderbuffer(buffer);
1668 if (b < 0)
1669 return;
1670
1671 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_NONE_EXT)
1672 return; /* BadMatch error */
1673
1674 rb = drawable->mesa_buffer.Attachment[b].Renderbuffer;
1675 if (!rb) {
1676 /* invalid buffer */
1677 return;
1678 }
1679 xrb = xmesa_renderbuffer(rb);
1680
1681 #if 0
1682 switch (drawable->TextureTarget) {
1683 case GLX_TEXTURE_1D_EXT:
1684 texObj = texUnit->CurrentTex[TEXTURE_1D_INDEX];
1685 break;
1686 case GLX_TEXTURE_2D_EXT:
1687 texObj = texUnit->CurrentTex[TEXTURE_2D_INDEX];
1688 break;
1689 case GLX_TEXTURE_RECTANGLE_EXT:
1690 texObj = texUnit->CurrentTex[TEXTURE_RECT_INDEX];
1691 break;
1692 default:
1693 return; /* BadMatch error */
1694 }
1695 #endif
1696
1697 /*
1698 * The following is a quick and simple way to implement
1699 * BindTexImage. The better way is to write some new FetchTexel()
1700 * functions which would extract texels from XImages. We'd still
1701 * need to use GetImage when texturing from a Pixmap (front buffer)
1702 * but texturing from a back buffer (XImage) would avoid an image
1703 * copy.
1704 */
1705
1706 /* get XImage */
1707 if (xrb->pixmap) {
1708 img = XMesaGetImage(dpy, xrb->pixmap, 0, 0, rb->Width, rb->Height, ~0L,
1709 ZPixmap);
1710 freeImg = GL_TRUE;
1711 }
1712 else if (xrb->ximage) {
1713 img = xrb->ximage;
1714 }
1715
1716 /* store the XImage as a new texture image */
1717 if (img) {
1718 GLenum format, type, intFormat;
1719 if (img->bits_per_pixel == 32) {
1720 format = GL_BGRA;
1721 type = GL_UNSIGNED_BYTE;
1722 intFormat = GL_RGBA;
1723 }
1724 else if (img->bits_per_pixel == 24) {
1725 format = GL_BGR;
1726 type = GL_UNSIGNED_BYTE;
1727 intFormat = GL_RGB;
1728 }
1729 else if (img->bits_per_pixel == 16) {
1730 format = GL_BGR;
1731 type = GL_UNSIGNED_SHORT_5_6_5;
1732 intFormat = GL_RGB;
1733 }
1734 else {
1735 _mesa_problem(NULL, "Unexpected XImage format in XMesaBindTexImage");
1736 return;
1737 }
1738 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGBA_EXT) {
1739 intFormat = GL_RGBA;
1740 }
1741 else if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGB_EXT) {
1742 intFormat = GL_RGB;
1743 }
1744
1745 _mesa_TexImage2D(GL_TEXTURE_2D, 0, intFormat, rb->Width, rb->Height, 0,
1746 format, type, img->data);
1747
1748 if (freeImg) {
1749 XMesaDestroyImage(img);
1750 }
1751 }
1752 }
1753
1754
1755
1756 PUBLIC void
1757 XMesaReleaseTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer)
1758 {
1759 const GLint b = xbuffer_to_renderbuffer(buffer);
1760 if (b < 0)
1761 return;
1762
1763 /* no-op for now */
1764 }
1765