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 *
39 * Byte swapping: If the Mesa host and the X display use a different
40 * byte order then there's some trickiness to be aware of when using
41 * XImages. The byte ordering used for the XImage is that of the X
42 * display, not the Mesa host.
43 * The color-to-pixel encoding for True/DirectColor must be done
44 * according to the display's visual red_mask, green_mask, and blue_mask.
45 * If XPutPixel is used to put a pixel into an XImage then XPutPixel will
46 * do byte swapping if needed. If one wants to directly "poke" the pixel
47 * into the XImage's buffer then the pixel must be byte swapped first.
48 *
49 */
50
51 #ifdef __CYGWIN__
52 #undef WIN32
53 #undef __WIN32__
54 #endif
55
56 #include <stdio.h>
57 #include "xm_api.h"
58 #include "xm_st.h"
59
60 #include "pipe/p_context.h"
61 #include "pipe/p_defines.h"
62 #include "pipe/p_screen.h"
63 #include "pipe/p_state.h"
64 #include "frontend/api.h"
65
66 #include "util/u_atomic.h"
67 #include "util/u_inlines.h"
68 #include "util/u_math.h"
69 #include "util/u_memory.h"
70
71 #include "hud/hud_context.h"
72
73 #include "main/errors.h"
74 #include "main/mtypes.h"
75
76 #include "xm_public.h"
77 #include <GL/glx.h>
78
79
80 /* Driver interface routines, set up by xlib backend on library
81 * _init(). These are global in the same way that function names are
82 * global.
83 */
84 static struct xm_driver driver;
85 static struct st_api *stapi;
86
87 /* Default strict invalidate to false. This means we will not call
88 * XGetGeometry after every swapbuffers, which allows swapbuffers to
89 * remain asynchronous. For apps running at 100fps with synchronous
90 * swapping, a 10% boost is typical. For gears, I see closer to 20%
91 * speedup.
92 *
93 * Note that the work of copying data on swapbuffers doesn't disappear
94 * - this change just allows the X server to execute the PutImage
95 * asynchronously without us effectively blocked until its completion.
96 *
97 * This speeds up even llvmpipe's threaded rasterization as the
98 * swapbuffers operation was a large part of the serial component of
99 * an llvmpipe frame.
100 *
101 * The downside of this is correctness - applications which don't call
102 * glViewport on window resizes will get incorrect rendering. A
103 * better solution would be to have per-frame but asynchronous
104 * invalidation. Xcb almost looks as if it could provide this, but
105 * the API doesn't seem to quite be there.
106 */
107 boolean xmesa_strict_invalidate = FALSE;
108
xmesa_set_driver(const struct xm_driver * templ)109 void xmesa_set_driver( const struct xm_driver *templ )
110 {
111 driver = *templ;
112 stapi = driver.create_st_api();
113
114 xmesa_strict_invalidate =
115 debug_get_bool_option("XMESA_STRICT_INVALIDATE", FALSE);
116 }
117
118
119 static int
xmesa_get_param(struct st_manager * smapi,enum st_manager_param param)120 xmesa_get_param(struct st_manager *smapi,
121 enum st_manager_param param)
122 {
123 switch(param) {
124 case ST_MANAGER_BROKEN_INVALIDATE:
125 return !xmesa_strict_invalidate;
126 default:
127 return 0;
128 }
129 }
130
131 /* linked list of XMesaDisplay hooks per display */
132 typedef struct _XMesaExtDisplayInfo {
133 struct _XMesaExtDisplayInfo *next;
134 Display *display;
135 struct xmesa_display mesaDisplay;
136 } XMesaExtDisplayInfo;
137
138 typedef struct _XMesaExtInfo {
139 XMesaExtDisplayInfo *head;
140 int ndisplays;
141 } XMesaExtInfo;
142
143 static XMesaExtInfo MesaExtInfo;
144
145 /* hook to delete XMesaDisplay on XDestroyDisplay */
146 extern void
xmesa_close_display(Display * display)147 xmesa_close_display(Display *display)
148 {
149 XMesaExtDisplayInfo *info, *prev;
150
151 /* These assertions are not valid since screen creation can fail and result
152 * in an empty list
153 assert(MesaExtInfo.ndisplays > 0);
154 assert(MesaExtInfo.head);
155 */
156
157 _XLockMutex(_Xglobal_lock);
158 /* first find display */
159 prev = NULL;
160 for (info = MesaExtInfo.head; info; info = info->next) {
161 if (info->display == display) {
162 prev = info;
163 break;
164 }
165 }
166
167 if (info == NULL) {
168 /* no display found */
169 _XUnlockMutex(_Xglobal_lock);
170 return;
171 }
172
173 /* remove display entry from list */
174 if (prev != MesaExtInfo.head) {
175 prev->next = info->next;
176 } else {
177 MesaExtInfo.head = info->next;
178 }
179 MesaExtInfo.ndisplays--;
180
181 _XUnlockMutex(_Xglobal_lock);
182
183 /* don't forget to clean up mesaDisplay */
184 XMesaDisplay xmdpy = &info->mesaDisplay;
185
186 /**
187 * XXX: Don't destroy the screens here, since there may still
188 * be some dangling screen pointers that are used after this point
189 * if (xmdpy->screen) {
190 * xmdpy->screen->destroy(xmdpy->screen);
191 * }
192 */
193
194 if (xmdpy->smapi->destroy)
195 xmdpy->smapi->destroy(xmdpy->smapi);
196 free(xmdpy->smapi);
197
198 XFree((char *) info);
199 }
200
201 static XMesaDisplay
xmesa_init_display(Display * display)202 xmesa_init_display( Display *display )
203 {
204 static mtx_t init_mutex = _MTX_INITIALIZER_NP;
205 XMesaDisplay xmdpy;
206 XMesaExtDisplayInfo *info;
207
208 if (display == NULL) {
209 return NULL;
210 }
211
212 mtx_lock(&init_mutex);
213
214 /* Look for XMesaDisplay which corresponds to this display */
215 info = MesaExtInfo.head;
216 while(info) {
217 if (info->display == display) {
218 /* Found it */
219 mtx_unlock(&init_mutex);
220 return &info->mesaDisplay;
221 }
222 info = info->next;
223 }
224
225 /* Not found. Create new XMesaDisplay */
226 /* first allocate X-related resources and hook destroy callback */
227
228 /* allocate mesa display info */
229 info = (XMesaExtDisplayInfo *) Xmalloc(sizeof(XMesaExtDisplayInfo));
230 if (info == NULL) {
231 mtx_unlock(&init_mutex);
232 return NULL;
233 }
234 info->display = display;
235
236 xmdpy = &info->mesaDisplay; /* to be filled out below */
237 xmdpy->display = display;
238 xmdpy->pipe = NULL;
239
240 xmdpy->smapi = CALLOC_STRUCT(st_manager);
241 if (!xmdpy->smapi) {
242 Xfree(info);
243 mtx_unlock(&init_mutex);
244 return NULL;
245 }
246
247 xmdpy->screen = driver.create_pipe_screen(display);
248 if (!xmdpy->screen) {
249 free(xmdpy->smapi);
250 Xfree(info);
251 mtx_unlock(&init_mutex);
252 return NULL;
253 }
254
255 /* At this point, both smapi and screen are known to be valid */
256 xmdpy->smapi->screen = xmdpy->screen;
257 xmdpy->smapi->get_param = xmesa_get_param;
258 (void) mtx_init(&xmdpy->mutex, mtx_plain);
259
260 /* chain to the list of displays */
261 _XLockMutex(_Xglobal_lock);
262 info->next = MesaExtInfo.head;
263 MesaExtInfo.head = info;
264 MesaExtInfo.ndisplays++;
265 _XUnlockMutex(_Xglobal_lock);
266
267 mtx_unlock(&init_mutex);
268
269 return xmdpy;
270 }
271
272
273 /**********************************************************************/
274 /***** X Utility Functions *****/
275 /**********************************************************************/
276
277
278 /**
279 * Return the host's byte order as LSBFirst or MSBFirst ala X.
280 */
host_byte_order(void)281 static int host_byte_order( void )
282 {
283 int i = 1;
284 char *cptr = (char *) &i;
285 return (*cptr==1) ? LSBFirst : MSBFirst;
286 }
287
288
289
290
291 /**
292 * Return the true number of bits per pixel for XImages.
293 * For example, if we request a 24-bit deep visual we may actually need/get
294 * 32bpp XImages. This function returns the appropriate bpp.
295 * Input: dpy - the X display
296 * visinfo - desribes the visual to be used for XImages
297 * Return: true number of bits per pixel for XImages
298 */
299 static int
bits_per_pixel(XMesaVisual xmv)300 bits_per_pixel( XMesaVisual xmv )
301 {
302 Display *dpy = xmv->display;
303 XVisualInfo * visinfo = xmv->visinfo;
304 XImage *img;
305 int bitsPerPixel;
306 /* Create a temporary XImage */
307 img = XCreateImage( dpy, visinfo->visual, visinfo->depth,
308 ZPixmap, 0, /*format, offset*/
309 malloc(8), /*data*/
310 1, 1, /*width, height*/
311 32, /*bitmap_pad*/
312 0 /*bytes_per_line*/
313 );
314 assert(img);
315 /* grab the bits/pixel value */
316 bitsPerPixel = img->bits_per_pixel;
317 /* free the XImage */
318 free( img->data );
319 img->data = NULL;
320 XDestroyImage( img );
321 return bitsPerPixel;
322 }
323
324
325
326 /*
327 * Determine if a given X window ID is valid (window exists).
328 * Do this by calling XGetWindowAttributes() for the window and
329 * checking if we catch an X error.
330 * Input: dpy - the display
331 * win - the window to check for existence
332 * Return: GL_TRUE - window exists
333 * GL_FALSE - window doesn't exist
334 */
335 static GLboolean WindowExistsFlag;
336
window_exists_err_handler(Display * dpy,XErrorEvent * xerr)337 static int window_exists_err_handler( Display* dpy, XErrorEvent* xerr )
338 {
339 (void) dpy;
340 if (xerr->error_code == BadWindow) {
341 WindowExistsFlag = GL_FALSE;
342 }
343 return 0;
344 }
345
window_exists(Display * dpy,Window win)346 static GLboolean window_exists( Display *dpy, Window win )
347 {
348 XWindowAttributes wa;
349 int (*old_handler)( Display*, XErrorEvent* );
350 WindowExistsFlag = GL_TRUE;
351 old_handler = XSetErrorHandler(window_exists_err_handler);
352 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */
353 XSetErrorHandler(old_handler);
354 return WindowExistsFlag;
355 }
356
357 static Status
get_drawable_size(Display * dpy,Drawable d,uint * width,uint * height)358 get_drawable_size( Display *dpy, Drawable d, uint *width, uint *height )
359 {
360 Window root;
361 Status stat;
362 int xpos, ypos;
363 unsigned int w, h, bw, depth;
364 stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth);
365 *width = w;
366 *height = h;
367 return stat;
368 }
369
370
371 /**
372 * Return the size of the window (or pixmap) that corresponds to the
373 * given XMesaBuffer.
374 * \param width returns width in pixels
375 * \param height returns height in pixels
376 */
377 void
xmesa_get_window_size(Display * dpy,XMesaBuffer b,GLuint * width,GLuint * height)378 xmesa_get_window_size(Display *dpy, XMesaBuffer b,
379 GLuint *width, GLuint *height)
380 {
381 XMesaDisplay xmdpy = xmesa_init_display(dpy);
382 Status stat;
383
384 mtx_lock(&xmdpy->mutex);
385 stat = get_drawable_size(dpy, b->ws.drawable, width, height);
386 mtx_unlock(&xmdpy->mutex);
387
388 if (!stat) {
389 /* probably querying a window that's recently been destroyed */
390 _mesa_warning(NULL, "XGetGeometry failed!\n");
391 *width = *height = 1;
392 }
393 }
394
395 #define GET_REDMASK(__v) __v->mesa_visual.redMask
396 #define GET_GREENMASK(__v) __v->mesa_visual.greenMask
397 #define GET_BLUEMASK(__v) __v->mesa_visual.blueMask
398
399
400 /**
401 * Choose the pixel format for the given visual.
402 * This will tell the gallium driver how to pack pixel data into
403 * drawing surfaces.
404 */
405 static GLuint
choose_pixel_format(XMesaVisual v)406 choose_pixel_format(XMesaVisual v)
407 {
408 boolean native_byte_order = (host_byte_order() ==
409 ImageByteOrder(v->display));
410
411 if ( GET_REDMASK(v) == 0x0000ff
412 && GET_GREENMASK(v) == 0x00ff00
413 && GET_BLUEMASK(v) == 0xff0000
414 && v->BitsPerPixel == 32) {
415 if (native_byte_order) {
416 /* no byteswapping needed */
417 return PIPE_FORMAT_RGBA8888_UNORM;
418 }
419 else {
420 return PIPE_FORMAT_ABGR8888_UNORM;
421 }
422 }
423 else if ( GET_REDMASK(v) == 0xff0000
424 && GET_GREENMASK(v) == 0x00ff00
425 && GET_BLUEMASK(v) == 0x0000ff
426 && v->BitsPerPixel == 32) {
427 if (native_byte_order) {
428 /* no byteswapping needed */
429 return PIPE_FORMAT_BGRA8888_UNORM;
430 }
431 else {
432 return PIPE_FORMAT_ARGB8888_UNORM;
433 }
434 }
435 else if ( GET_REDMASK(v) == 0x0000ff00
436 && GET_GREENMASK(v) == 0x00ff0000
437 && GET_BLUEMASK(v) == 0xff000000
438 && v->BitsPerPixel == 32) {
439 if (native_byte_order) {
440 /* no byteswapping needed */
441 return PIPE_FORMAT_ARGB8888_UNORM;
442 }
443 else {
444 return PIPE_FORMAT_BGRA8888_UNORM;
445 }
446 }
447 else if ( GET_REDMASK(v) == 0xf800
448 && GET_GREENMASK(v) == 0x07e0
449 && GET_BLUEMASK(v) == 0x001f
450 && native_byte_order
451 && v->BitsPerPixel == 16) {
452 /* 5-6-5 RGB */
453 return PIPE_FORMAT_B5G6R5_UNORM;
454 }
455
456 return PIPE_FORMAT_NONE;
457 }
458
459
460 /**
461 * Choose a depth/stencil format that satisfies the given depth and
462 * stencil sizes.
463 */
464 static enum pipe_format
choose_depth_stencil_format(XMesaDisplay xmdpy,int depth,int stencil,int sample_count)465 choose_depth_stencil_format(XMesaDisplay xmdpy, int depth, int stencil,
466 int sample_count)
467 {
468 const enum pipe_texture_target target = PIPE_TEXTURE_2D;
469 const unsigned tex_usage = PIPE_BIND_DEPTH_STENCIL;
470 enum pipe_format formats[8], fmt;
471 int count, i;
472
473 count = 0;
474
475 if (depth <= 16 && stencil == 0) {
476 formats[count++] = PIPE_FORMAT_Z16_UNORM;
477 }
478 if (depth <= 24 && stencil == 0) {
479 formats[count++] = PIPE_FORMAT_X8Z24_UNORM;
480 formats[count++] = PIPE_FORMAT_Z24X8_UNORM;
481 }
482 if (depth <= 24 && stencil <= 8) {
483 formats[count++] = PIPE_FORMAT_S8_UINT_Z24_UNORM;
484 formats[count++] = PIPE_FORMAT_Z24_UNORM_S8_UINT;
485 }
486 if (depth <= 32 && stencil == 0) {
487 formats[count++] = PIPE_FORMAT_Z32_UNORM;
488 }
489
490 fmt = PIPE_FORMAT_NONE;
491 for (i = 0; i < count; i++) {
492 if (xmdpy->screen->is_format_supported(xmdpy->screen, formats[i],
493 target, sample_count,
494 sample_count, tex_usage)) {
495 fmt = formats[i];
496 break;
497 }
498 }
499
500 return fmt;
501 }
502
503
504
505 /**********************************************************************/
506 /***** Linked list of XMesaBuffers *****/
507 /**********************************************************************/
508
509 static XMesaBuffer XMesaBufferList = NULL;
510
511
512 /**
513 * Allocate a new XMesaBuffer object which corresponds to the given drawable.
514 * Note that XMesaBuffer is derived from struct gl_framebuffer.
515 * The new XMesaBuffer will not have any size (Width=Height=0).
516 *
517 * \param d the corresponding X drawable (window or pixmap)
518 * \param type either WINDOW, PIXMAP or PBUFFER, describing d
519 * \param vis the buffer's visual
520 * \param cmap the window's colormap, if known.
521 * \return new XMesaBuffer or NULL if any problem
522 */
523 static XMesaBuffer
create_xmesa_buffer(Drawable d,BufferType type,XMesaVisual vis,Colormap cmap)524 create_xmesa_buffer(Drawable d, BufferType type,
525 XMesaVisual vis, Colormap cmap)
526 {
527 XMesaDisplay xmdpy = xmesa_init_display(vis->display);
528 XMesaBuffer b;
529
530 assert(type == WINDOW || type == PIXMAP || type == PBUFFER);
531
532 if (!xmdpy)
533 return NULL;
534
535 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer);
536 if (!b)
537 return NULL;
538
539 b->ws.drawable = d;
540 b->ws.visual = vis->visinfo->visual;
541 b->ws.depth = vis->visinfo->depth;
542
543 b->xm_visual = vis;
544 b->type = type;
545 b->cmap = cmap;
546
547 get_drawable_size(vis->display, d, &b->width, &b->height);
548
549 /*
550 * Create framebuffer, but we'll plug in our own renderbuffers below.
551 */
552 b->stfb = xmesa_create_st_framebuffer(xmdpy, b);
553
554 /* GLX_EXT_texture_from_pixmap */
555 b->TextureTarget = 0;
556 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT;
557 b->TextureMipmap = 0;
558
559 /* insert buffer into linked list */
560 b->Next = XMesaBufferList;
561 XMesaBufferList = b;
562
563 return b;
564 }
565
566
567 /**
568 * Find an XMesaBuffer by matching X display and colormap but NOT matching
569 * the notThis buffer.
570 */
571 XMesaBuffer
xmesa_find_buffer(Display * dpy,Colormap cmap,XMesaBuffer notThis)572 xmesa_find_buffer(Display *dpy, Colormap cmap, XMesaBuffer notThis)
573 {
574 XMesaBuffer b;
575 for (b = XMesaBufferList; b; b = b->Next) {
576 if (b->xm_visual->display == dpy &&
577 b->cmap == cmap &&
578 b != notThis) {
579 return b;
580 }
581 }
582 return NULL;
583 }
584
585
586 /**
587 * Remove buffer from linked list, delete if no longer referenced.
588 */
589 static void
xmesa_free_buffer(XMesaBuffer buffer)590 xmesa_free_buffer(XMesaBuffer buffer)
591 {
592 XMesaBuffer prev = NULL, b;
593
594 for (b = XMesaBufferList; b; b = b->Next) {
595 if (b == buffer) {
596 /* unlink buffer from list */
597 if (prev)
598 prev->Next = buffer->Next;
599 else
600 XMesaBufferList = buffer->Next;
601
602 /* Since the X window for the XMesaBuffer is going away, we don't
603 * want to dereference this pointer in the future.
604 */
605 b->ws.drawable = 0;
606
607 /* Notify the st manager that the associated framebuffer interface
608 * object is no longer valid.
609 */
610 stapi->destroy_drawable(stapi, buffer->stfb);
611
612 /* XXX we should move the buffer to a delete-pending list and destroy
613 * the buffer until it is no longer current.
614 */
615 xmesa_destroy_st_framebuffer(buffer->stfb);
616
617 free(buffer);
618
619 return;
620 }
621 /* continue search */
622 prev = b;
623 }
624 /* buffer not found in XMesaBufferList */
625 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n");
626 }
627
628
629
630 /**********************************************************************/
631 /***** Misc Private Functions *****/
632 /**********************************************************************/
633
634
635 /**
636 * When a context is bound for the first time, we can finally finish
637 * initializing the context's visual and buffer information.
638 * \param v the XMesaVisual to initialize
639 * \param b the XMesaBuffer to initialize (may be NULL)
640 * \param window the window/pixmap we're rendering into
641 * \param cmap the colormap associated with the window/pixmap
642 * \return GL_TRUE=success, GL_FALSE=failure
643 */
644 static GLboolean
initialize_visual_and_buffer(XMesaVisual v,XMesaBuffer b,Drawable window,Colormap cmap)645 initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b,
646 Drawable window, Colormap cmap)
647 {
648 assert(!b || b->xm_visual == v);
649
650 /* Save true bits/pixel */
651 v->BitsPerPixel = bits_per_pixel(v);
652 assert(v->BitsPerPixel > 0);
653
654 /* RGB WINDOW:
655 * We support RGB rendering into almost any kind of visual.
656 */
657 const int xclass = v->visualType;
658 if (xclass != GLX_TRUE_COLOR && xclass != GLX_DIRECT_COLOR) {
659 _mesa_warning(NULL,
660 "XMesa: RGB mode rendering not supported in given visual.\n");
661 return GL_FALSE;
662 }
663
664 if (v->BitsPerPixel == 32) {
665 /* We use XImages for all front/back buffers. If an X Window or
666 * X Pixmap is 32bpp, there's no guarantee that the alpha channel
667 * will be preserved. For XImages we're in luck.
668 */
669 v->mesa_visual.alphaBits = 8;
670 }
671
672 /*
673 * If MESA_INFO env var is set print out some debugging info
674 * which can help Brian figure out what's going on when a user
675 * reports bugs.
676 */
677 if (getenv("MESA_INFO")) {
678 printf("X/Mesa visual = %p\n", (void *) v);
679 printf("X/Mesa depth = %d\n", v->visinfo->depth);
680 printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel);
681 }
682
683 return GL_TRUE;
684 }
685
686
687
688 #define NUM_VISUAL_TYPES 6
689
690 /**
691 * Convert an X visual type to a GLX visual type.
692 *
693 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.)
694 * to be converted.
695 * \return If \c visualType is a valid X visual type, a GLX visual type will
696 * be returned. Otherwise \c GLX_NONE will be returned.
697 *
698 * \note
699 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the
700 * DRI CVS tree.
701 */
702 static GLint
xmesa_convert_from_x_visual_type(int visualType)703 xmesa_convert_from_x_visual_type( int visualType )
704 {
705 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = {
706 GLX_STATIC_GRAY, GLX_GRAY_SCALE,
707 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR,
708 GLX_TRUE_COLOR, GLX_DIRECT_COLOR
709 };
710
711 return ( (unsigned) visualType < NUM_VISUAL_TYPES )
712 ? glx_visual_types[ visualType ] : GLX_NONE;
713 }
714
715
716 /**********************************************************************/
717 /***** Public Functions *****/
718 /**********************************************************************/
719
720
721 /*
722 * Create a new X/Mesa visual.
723 * Input: display - X11 display
724 * visinfo - an XVisualInfo pointer
725 * rgb_flag - GL_TRUE = RGB mode,
726 * GL_FALSE = color index mode
727 * alpha_flag - alpha buffer requested?
728 * db_flag - GL_TRUE = double-buffered,
729 * GL_FALSE = single buffered
730 * stereo_flag - stereo visual?
731 * ximage_flag - GL_TRUE = use an XImage for back buffer,
732 * GL_FALSE = use an off-screen pixmap for back buffer
733 * depth_size - requested bits/depth values, or zero
734 * stencil_size - requested bits/stencil values, or zero
735 * accum_red_size - requested bits/red accum values, or zero
736 * accum_green_size - requested bits/green accum values, or zero
737 * accum_blue_size - requested bits/blue accum values, or zero
738 * accum_alpha_size - requested bits/alpha accum values, or zero
739 * num_samples - number of samples/pixel if multisampling, or zero
740 * level - visual level, usually 0
741 * visualCaveat - ala the GLX extension, usually GLX_NONE
742 * Return; a new XMesaVisual or 0 if error.
743 */
744 PUBLIC
XMesaCreateVisual(Display * display,XVisualInfo * visinfo,GLboolean rgb_flag,GLboolean alpha_flag,GLboolean db_flag,GLboolean stereo_flag,GLboolean ximage_flag,GLint depth_size,GLint stencil_size,GLint accum_red_size,GLint accum_green_size,GLint accum_blue_size,GLint accum_alpha_size,GLint num_samples,GLint level,GLint visualCaveat)745 XMesaVisual XMesaCreateVisual( Display *display,
746 XVisualInfo * visinfo,
747 GLboolean rgb_flag,
748 GLboolean alpha_flag,
749 GLboolean db_flag,
750 GLboolean stereo_flag,
751 GLboolean ximage_flag,
752 GLint depth_size,
753 GLint stencil_size,
754 GLint accum_red_size,
755 GLint accum_green_size,
756 GLint accum_blue_size,
757 GLint accum_alpha_size,
758 GLint num_samples,
759 GLint level,
760 GLint visualCaveat )
761 {
762 XMesaDisplay xmdpy = xmesa_init_display(display);
763 XMesaVisual v;
764 GLint red_bits, green_bits, blue_bits, alpha_bits;
765
766 if (!xmdpy)
767 return NULL;
768
769 if (!rgb_flag)
770 return NULL;
771
772 /* For debugging only */
773 if (getenv("MESA_XSYNC")) {
774 /* This makes debugging X easier.
775 * In your debugger, set a breakpoint on _XError to stop when an
776 * X protocol error is generated.
777 */
778 XSynchronize( display, 1 );
779 }
780
781 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual);
782 if (!v) {
783 return NULL;
784 }
785
786 v->display = display;
787
788 /* Save a copy of the XVisualInfo struct because the user may Xfree()
789 * the struct but we may need some of the information contained in it
790 * at a later time.
791 */
792 v->visinfo = malloc(sizeof(*visinfo));
793 if (!v->visinfo) {
794 free(v);
795 return NULL;
796 }
797 memcpy(v->visinfo, visinfo, sizeof(*visinfo));
798
799 v->ximage_flag = ximage_flag;
800
801 v->mesa_visual.redMask = visinfo->red_mask;
802 v->mesa_visual.greenMask = visinfo->green_mask;
803 v->mesa_visual.blueMask = visinfo->blue_mask;
804 v->visualID = visinfo->visualid;
805 v->screen = visinfo->screen;
806
807 #if !(defined(__cplusplus) || defined(c_plusplus))
808 v->visualType = xmesa_convert_from_x_visual_type(visinfo->class);
809 #else
810 v->visualType = xmesa_convert_from_x_visual_type(visinfo->c_class);
811 #endif
812
813 if (alpha_flag)
814 v->mesa_visual.alphaBits = 8;
815
816 (void) initialize_visual_and_buffer( v, NULL, 0, 0 );
817
818 {
819 const int xclass = v->visualType;
820 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
821 red_bits = util_bitcount(GET_REDMASK(v));
822 green_bits = util_bitcount(GET_GREENMASK(v));
823 blue_bits = util_bitcount(GET_BLUEMASK(v));
824 }
825 else {
826 /* this is an approximation */
827 int depth;
828 depth = v->visinfo->depth;
829 red_bits = depth / 3;
830 depth -= red_bits;
831 green_bits = depth / 2;
832 depth -= green_bits;
833 blue_bits = depth;
834 alpha_bits = 0;
835 assert( red_bits + green_bits + blue_bits == v->visinfo->depth );
836 }
837 alpha_bits = v->mesa_visual.alphaBits;
838 }
839
840 /* initialize visual */
841 {
842 struct gl_config *vis = &v->mesa_visual;
843
844 vis->doubleBufferMode = db_flag;
845 vis->stereoMode = stereo_flag;
846
847 vis->redBits = red_bits;
848 vis->greenBits = green_bits;
849 vis->blueBits = blue_bits;
850 vis->alphaBits = alpha_bits;
851 vis->rgbBits = red_bits + green_bits + blue_bits;
852
853 vis->depthBits = depth_size;
854 vis->stencilBits = stencil_size;
855
856 vis->accumRedBits = accum_red_size;
857 vis->accumGreenBits = accum_green_size;
858 vis->accumBlueBits = accum_blue_size;
859 vis->accumAlphaBits = accum_alpha_size;
860
861 vis->samples = num_samples;
862 }
863
864 v->stvis.buffer_mask = ST_ATTACHMENT_FRONT_LEFT_MASK;
865 if (db_flag)
866 v->stvis.buffer_mask |= ST_ATTACHMENT_BACK_LEFT_MASK;
867 if (stereo_flag) {
868 v->stvis.buffer_mask |= ST_ATTACHMENT_FRONT_RIGHT_MASK;
869 if (db_flag)
870 v->stvis.buffer_mask |= ST_ATTACHMENT_BACK_RIGHT_MASK;
871 }
872
873 v->stvis.color_format = choose_pixel_format(v);
874
875 /* Check format support at requested num_samples (for multisample) */
876 if (!xmdpy->screen->is_format_supported(xmdpy->screen,
877 v->stvis.color_format,
878 PIPE_TEXTURE_2D, num_samples,
879 num_samples,
880 PIPE_BIND_RENDER_TARGET))
881 v->stvis.color_format = PIPE_FORMAT_NONE;
882
883 if (v->stvis.color_format == PIPE_FORMAT_NONE) {
884 free(v->visinfo);
885 free(v);
886 return NULL;
887 }
888
889 v->stvis.depth_stencil_format =
890 choose_depth_stencil_format(xmdpy, depth_size, stencil_size,
891 num_samples);
892
893 v->stvis.accum_format = (accum_red_size +
894 accum_green_size + accum_blue_size + accum_alpha_size) ?
895 PIPE_FORMAT_R16G16B16A16_SNORM : PIPE_FORMAT_NONE;
896
897 v->stvis.samples = num_samples;
898
899 return v;
900 }
901
902
903 PUBLIC
XMesaDestroyVisual(XMesaVisual v)904 void XMesaDestroyVisual( XMesaVisual v )
905 {
906 free(v->visinfo);
907 free(v);
908 }
909
910
911 /**
912 * Return the informative name.
913 */
914 const char *
xmesa_get_name(void)915 xmesa_get_name(void)
916 {
917 return stapi->name;
918 }
919
920
921 /**
922 * Do per-display initializations.
923 */
924 int
xmesa_init(Display * display)925 xmesa_init( Display *display )
926 {
927 return xmesa_init_display(display) ? 0 : 1;
928 }
929
930
931 /**
932 * Create a new XMesaContext.
933 * \param v the XMesaVisual
934 * \param share_list another XMesaContext with which to share display
935 * lists or NULL if no sharing is wanted.
936 * \return an XMesaContext or NULL if error.
937 */
938 PUBLIC
XMesaCreateContext(XMesaVisual v,XMesaContext share_list,GLuint major,GLuint minor,GLuint profileMask,GLuint contextFlags)939 XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list,
940 GLuint major, GLuint minor,
941 GLuint profileMask, GLuint contextFlags)
942 {
943 XMesaDisplay xmdpy = xmesa_init_display(v->display);
944 struct st_context_attribs attribs;
945 enum st_context_error ctx_err = 0;
946 XMesaContext c;
947
948 if (!xmdpy)
949 goto no_xmesa_context;
950
951 /* Note: the XMesaContext contains a Mesa struct gl_context struct (inheritance) */
952 c = (XMesaContext) CALLOC_STRUCT(xmesa_context);
953 if (!c)
954 goto no_xmesa_context;
955
956 c->xm_visual = v;
957 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */
958 c->xm_read_buffer = NULL;
959
960 memset(&attribs, 0, sizeof(attribs));
961 attribs.visual = v->stvis;
962 attribs.major = major;
963 attribs.minor = minor;
964 if (contextFlags & GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB)
965 attribs.flags |= ST_CONTEXT_FLAG_FORWARD_COMPATIBLE;
966 if (contextFlags & GLX_CONTEXT_DEBUG_BIT_ARB)
967 attribs.flags |= ST_CONTEXT_FLAG_DEBUG;
968 if (contextFlags & GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB)
969 attribs.flags |= ST_CONTEXT_FLAG_ROBUST_ACCESS;
970
971 switch (profileMask) {
972 case GLX_CONTEXT_CORE_PROFILE_BIT_ARB:
973 /* There are no profiles before OpenGL 3.2. The
974 * GLX_ARB_create_context_profile spec says:
975 *
976 * "If the requested OpenGL version is less than 3.2,
977 * GLX_CONTEXT_PROFILE_MASK_ARB is ignored and the functionality
978 * of the context is determined solely by the requested version."
979 */
980 if (major > 3 || (major == 3 && minor >= 2)) {
981 attribs.profile = ST_PROFILE_OPENGL_CORE;
982 break;
983 }
984 FALLTHROUGH;
985 case GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB:
986 /*
987 * The spec also says:
988 *
989 * "If version 3.1 is requested, the context returned may implement
990 * any of the following versions:
991 *
992 * * Version 3.1. The GL_ARB_compatibility extension may or may not
993 * be implemented, as determined by the implementation.
994 * * The core profile of version 3.2 or greater."
995 *
996 * and because Mesa doesn't support GL_ARB_compatibility, the only chance to
997 * honour a 3.1 context is through core profile.
998 */
999 if (major == 3 && minor == 1) {
1000 attribs.profile = ST_PROFILE_OPENGL_CORE;
1001 } else {
1002 attribs.profile = ST_PROFILE_DEFAULT;
1003 }
1004 break;
1005 case GLX_CONTEXT_ES_PROFILE_BIT_EXT:
1006 if (major >= 2) {
1007 attribs.profile = ST_PROFILE_OPENGL_ES2;
1008 } else {
1009 attribs.profile = ST_PROFILE_OPENGL_ES1;
1010 }
1011 break;
1012 default:
1013 assert(0);
1014 goto no_st;
1015 }
1016
1017 c->st = stapi->create_context(stapi, xmdpy->smapi, &attribs,
1018 &ctx_err, (share_list) ? share_list->st : NULL);
1019 if (c->st == NULL)
1020 goto no_st;
1021
1022 c->st->st_manager_private = (void *) c;
1023
1024 c->hud = hud_create(c->st->cso_context, c->st, NULL);
1025
1026 return c;
1027
1028 no_st:
1029 free(c);
1030 no_xmesa_context:
1031 return NULL;
1032 }
1033
1034
1035
1036 PUBLIC
XMesaDestroyContext(XMesaContext c)1037 void XMesaDestroyContext( XMesaContext c )
1038 {
1039 if (c->hud) {
1040 hud_destroy(c->hud, NULL);
1041 }
1042
1043 c->st->destroy(c->st);
1044
1045 /* FIXME: We should destroy the screen here, but if we do so, surfaces may
1046 * outlive it, causing segfaults
1047 struct pipe_screen *screen = c->st->pipe->screen;
1048 screen->destroy(screen);
1049 */
1050
1051 free(c);
1052 }
1053
1054
1055
1056 /**
1057 * Private function for creating an XMesaBuffer which corresponds to an
1058 * X window or pixmap.
1059 * \param v the window's XMesaVisual
1060 * \param w the window we're wrapping
1061 * \return new XMesaBuffer or NULL if error
1062 */
1063 PUBLIC XMesaBuffer
XMesaCreateWindowBuffer(XMesaVisual v,Window w)1064 XMesaCreateWindowBuffer(XMesaVisual v, Window w)
1065 {
1066 XWindowAttributes attr;
1067 XMesaBuffer b;
1068 Colormap cmap;
1069 int depth;
1070
1071 assert(v);
1072 assert(w);
1073
1074 /* Check that window depth matches visual depth */
1075 XGetWindowAttributes( v->display, w, &attr );
1076 depth = attr.depth;
1077 if (v->visinfo->depth != depth) {
1078 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
1079 v->visinfo->depth, depth);
1080 return NULL;
1081 }
1082
1083 /* Find colormap */
1084 if (attr.colormap) {
1085 cmap = attr.colormap;
1086 }
1087 else {
1088 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w);
1089 /* this is weird, a window w/out a colormap!? */
1090 /* OK, let's just allocate a new one and hope for the best */
1091 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone);
1092 }
1093
1094 b = create_xmesa_buffer((Drawable) w, WINDOW, v, cmap);
1095 if (!b)
1096 return NULL;
1097
1098 if (!initialize_visual_and_buffer( v, b, (Drawable) w, cmap )) {
1099 xmesa_free_buffer(b);
1100 return NULL;
1101 }
1102
1103 return b;
1104 }
1105
1106
1107
1108 /**
1109 * Create a new XMesaBuffer from an X pixmap.
1110 *
1111 * \param v the XMesaVisual
1112 * \param p the pixmap
1113 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or
1114 * \c GLX_DIRECT_COLOR visual for the pixmap
1115 * \returns new XMesaBuffer or NULL if error
1116 */
1117 PUBLIC XMesaBuffer
XMesaCreatePixmapBuffer(XMesaVisual v,Pixmap p,Colormap cmap)1118 XMesaCreatePixmapBuffer(XMesaVisual v, Pixmap p, Colormap cmap)
1119 {
1120 XMesaBuffer b;
1121
1122 assert(v);
1123
1124 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap);
1125 if (!b)
1126 return NULL;
1127
1128 if (!initialize_visual_and_buffer(v, b, (Drawable) p, cmap)) {
1129 xmesa_free_buffer(b);
1130 return NULL;
1131 }
1132
1133 return b;
1134 }
1135
1136
1137 /**
1138 * For GLX_EXT_texture_from_pixmap
1139 */
1140 XMesaBuffer
XMesaCreatePixmapTextureBuffer(XMesaVisual v,Pixmap p,Colormap cmap,int format,int target,int mipmap)1141 XMesaCreatePixmapTextureBuffer(XMesaVisual v, Pixmap p,
1142 Colormap cmap,
1143 int format, int target, int mipmap)
1144 {
1145 GET_CURRENT_CONTEXT(ctx);
1146 XMesaBuffer b;
1147
1148 assert(v);
1149
1150 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap);
1151 if (!b)
1152 return NULL;
1153
1154 /* get pixmap size */
1155 xmesa_get_window_size(v->display, b, &b->width, &b->height);
1156
1157 if (target == 0) {
1158 /* examine dims */
1159 if (ctx->Extensions.ARB_texture_non_power_of_two) {
1160 target = GLX_TEXTURE_2D_EXT;
1161 }
1162 else if ( util_bitcount(b->width) == 1
1163 && util_bitcount(b->height) == 1) {
1164 /* power of two size */
1165 if (b->height == 1) {
1166 target = GLX_TEXTURE_1D_EXT;
1167 }
1168 else {
1169 target = GLX_TEXTURE_2D_EXT;
1170 }
1171 }
1172 else if (ctx->Extensions.NV_texture_rectangle) {
1173 target = GLX_TEXTURE_RECTANGLE_EXT;
1174 }
1175 else {
1176 /* non power of two textures not supported */
1177 XMesaDestroyBuffer(b);
1178 return 0;
1179 }
1180 }
1181
1182 b->TextureTarget = target;
1183 b->TextureFormat = format;
1184 b->TextureMipmap = mipmap;
1185
1186 if (!initialize_visual_and_buffer(v, b, (Drawable) p, cmap)) {
1187 xmesa_free_buffer(b);
1188 return NULL;
1189 }
1190
1191 return b;
1192 }
1193
1194
1195
1196 XMesaBuffer
XMesaCreatePBuffer(XMesaVisual v,Colormap cmap,unsigned int width,unsigned int height)1197 XMesaCreatePBuffer(XMesaVisual v, Colormap cmap,
1198 unsigned int width, unsigned int height)
1199 {
1200 Window root;
1201 Drawable drawable; /* X Pixmap Drawable */
1202 XMesaBuffer b;
1203
1204 /* allocate pixmap for front buffer */
1205 root = RootWindow( v->display, v->visinfo->screen );
1206 drawable = XCreatePixmap(v->display, root, width, height,
1207 v->visinfo->depth);
1208 if (!drawable)
1209 return NULL;
1210
1211 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap);
1212 if (!b)
1213 return NULL;
1214
1215 if (!initialize_visual_and_buffer(v, b, drawable, cmap)) {
1216 xmesa_free_buffer(b);
1217 return NULL;
1218 }
1219
1220 return b;
1221 }
1222
1223
1224
1225 /*
1226 * Deallocate an XMesaBuffer structure and all related info.
1227 */
1228 PUBLIC void
XMesaDestroyBuffer(XMesaBuffer b)1229 XMesaDestroyBuffer(XMesaBuffer b)
1230 {
1231 xmesa_free_buffer(b);
1232 }
1233
1234
1235 /**
1236 * Notify the binding context to validate the buffer.
1237 */
1238 void
xmesa_notify_invalid_buffer(XMesaBuffer b)1239 xmesa_notify_invalid_buffer(XMesaBuffer b)
1240 {
1241 p_atomic_inc(&b->stfb->stamp);
1242 }
1243
1244
1245 /**
1246 * Query the current drawable size and notify the binding context.
1247 */
1248 void
xmesa_check_buffer_size(XMesaBuffer b)1249 xmesa_check_buffer_size(XMesaBuffer b)
1250 {
1251 GLuint old_width, old_height;
1252
1253 if (!b)
1254 return;
1255
1256 if (b->type == PBUFFER)
1257 return;
1258
1259 old_width = b->width;
1260 old_height = b->height;
1261
1262 xmesa_get_window_size(b->xm_visual->display, b, &b->width, &b->height);
1263
1264 if (b->width != old_width || b->height != old_height)
1265 xmesa_notify_invalid_buffer(b);
1266 }
1267
1268
1269 /*
1270 * Bind buffer b to context c and make c the current rendering context.
1271 */
1272 PUBLIC
XMesaMakeCurrent2(XMesaContext c,XMesaBuffer drawBuffer,XMesaBuffer readBuffer)1273 GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer,
1274 XMesaBuffer readBuffer )
1275 {
1276 XMesaContext old_ctx = XMesaGetCurrentContext();
1277
1278 if (old_ctx && old_ctx != c) {
1279 XMesaFlush(old_ctx);
1280 old_ctx->xm_buffer = NULL;
1281 old_ctx->xm_read_buffer = NULL;
1282 }
1283
1284 if (c) {
1285 if (!drawBuffer != !readBuffer) {
1286 return GL_FALSE; /* must specify zero or two buffers! */
1287 }
1288
1289 if (c == old_ctx &&
1290 c->xm_buffer == drawBuffer &&
1291 c->xm_read_buffer == readBuffer)
1292 return GL_TRUE;
1293
1294 xmesa_check_buffer_size(drawBuffer);
1295 if (readBuffer != drawBuffer)
1296 xmesa_check_buffer_size(readBuffer);
1297
1298 c->xm_buffer = drawBuffer;
1299 c->xm_read_buffer = readBuffer;
1300
1301 stapi->make_current(stapi, c->st,
1302 drawBuffer ? drawBuffer->stfb : NULL,
1303 readBuffer ? readBuffer->stfb : NULL);
1304
1305 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */
1306 if (drawBuffer)
1307 drawBuffer->wasCurrent = GL_TRUE;
1308 }
1309 else {
1310 /* Detach */
1311 stapi->make_current(stapi, NULL, NULL, NULL);
1312
1313 }
1314 return GL_TRUE;
1315 }
1316
1317
1318 /*
1319 * Unbind the context c from its buffer.
1320 */
XMesaUnbindContext(XMesaContext c)1321 GLboolean XMesaUnbindContext( XMesaContext c )
1322 {
1323 /* A no-op for XFree86 integration purposes */
1324 return GL_TRUE;
1325 }
1326
1327
XMesaGetCurrentContext(void)1328 XMesaContext XMesaGetCurrentContext( void )
1329 {
1330 struct st_context_iface *st = stapi->get_current(stapi);
1331 return (XMesaContext) (st) ? st->st_manager_private : NULL;
1332 }
1333
1334
1335
1336 /**
1337 * Swap front and back color buffers and have winsys display front buffer.
1338 * If there's no front color buffer no swap actually occurs.
1339 */
1340 PUBLIC
XMesaSwapBuffers(XMesaBuffer b)1341 void XMesaSwapBuffers( XMesaBuffer b )
1342 {
1343 XMesaContext xmctx = XMesaGetCurrentContext();
1344
1345 /* Need to draw HUD before flushing */
1346 if (xmctx && xmctx->hud) {
1347 struct pipe_resource *back =
1348 xmesa_get_framebuffer_resource(b->stfb, ST_ATTACHMENT_BACK_LEFT);
1349 hud_run(xmctx->hud, NULL, back);
1350 }
1351
1352 if (xmctx && xmctx->xm_buffer == b) {
1353 xmctx->st->flush( xmctx->st, ST_FLUSH_FRONT, NULL, NULL, NULL);
1354 }
1355
1356 xmesa_swap_st_framebuffer(b->stfb);
1357 }
1358
1359
1360
1361 /*
1362 * Copy sub-region of back buffer to front buffer
1363 */
XMesaCopySubBuffer(XMesaBuffer b,int x,int y,int width,int height)1364 void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height )
1365 {
1366 XMesaContext xmctx = XMesaGetCurrentContext();
1367
1368 xmctx->st->flush( xmctx->st, ST_FLUSH_FRONT, NULL, NULL, NULL);
1369
1370 xmesa_copy_st_framebuffer(b->stfb,
1371 ST_ATTACHMENT_BACK_LEFT, ST_ATTACHMENT_FRONT_LEFT,
1372 x, b->height - y - height, width, height);
1373 }
1374
1375
1376
XMesaFlush(XMesaContext c)1377 void XMesaFlush( XMesaContext c )
1378 {
1379 if (c && c->xm_visual->display) {
1380 XMesaDisplay xmdpy = xmesa_init_display(c->xm_visual->display);
1381 struct pipe_fence_handle *fence = NULL;
1382
1383 c->st->flush(c->st, ST_FLUSH_FRONT, &fence, NULL, NULL);
1384 if (fence) {
1385 xmdpy->screen->fence_finish(xmdpy->screen, NULL, fence,
1386 PIPE_TIMEOUT_INFINITE);
1387 xmdpy->screen->fence_reference(xmdpy->screen, &fence, NULL);
1388 }
1389 XFlush( c->xm_visual->display );
1390 }
1391 }
1392
1393
1394
1395
1396
XMesaFindBuffer(Display * dpy,Drawable d)1397 XMesaBuffer XMesaFindBuffer( Display *dpy, Drawable d )
1398 {
1399 XMesaBuffer b;
1400 for (b = XMesaBufferList; b; b = b->Next) {
1401 if (b->ws.drawable == d && b->xm_visual->display == dpy) {
1402 return b;
1403 }
1404 }
1405 return NULL;
1406 }
1407
1408
1409 /**
1410 * Free/destroy all XMesaBuffers associated with given display.
1411 */
xmesa_destroy_buffers_on_display(Display * dpy)1412 void xmesa_destroy_buffers_on_display(Display *dpy)
1413 {
1414 XMesaBuffer b, next;
1415 for (b = XMesaBufferList; b; b = next) {
1416 next = b->Next;
1417 if (b->xm_visual->display == dpy) {
1418 xmesa_free_buffer(b);
1419 /* delete head of list? */
1420 if (XMesaBufferList == b) {
1421 XMesaBufferList = next;
1422 }
1423 }
1424 }
1425 }
1426
1427
1428 /*
1429 * Look for XMesaBuffers whose X window has been destroyed.
1430 * Deallocate any such XMesaBuffers.
1431 */
XMesaGarbageCollect(void)1432 void XMesaGarbageCollect( void )
1433 {
1434 XMesaBuffer b, next;
1435 for (b=XMesaBufferList; b; b=next) {
1436 next = b->Next;
1437 if (b->xm_visual &&
1438 b->xm_visual->display &&
1439 b->ws.drawable &&
1440 b->type == WINDOW) {
1441 XSync(b->xm_visual->display, False);
1442 if (!window_exists( b->xm_visual->display, b->ws.drawable )) {
1443 /* found a dead window, free the ancillary info */
1444 XMesaDestroyBuffer( b );
1445 }
1446 }
1447 }
1448 }
1449
1450
xmesa_attachment_type(int glx_attachment)1451 static enum st_attachment_type xmesa_attachment_type(int glx_attachment)
1452 {
1453 switch(glx_attachment) {
1454 case GLX_FRONT_LEFT_EXT:
1455 return ST_ATTACHMENT_FRONT_LEFT;
1456 case GLX_FRONT_RIGHT_EXT:
1457 return ST_ATTACHMENT_FRONT_RIGHT;
1458 case GLX_BACK_LEFT_EXT:
1459 return ST_ATTACHMENT_BACK_LEFT;
1460 case GLX_BACK_RIGHT_EXT:
1461 return ST_ATTACHMENT_BACK_RIGHT;
1462 default:
1463 assert(0);
1464 return ST_ATTACHMENT_FRONT_LEFT;
1465 }
1466 }
1467
1468
1469 PUBLIC void
XMesaBindTexImage(Display * dpy,XMesaBuffer drawable,int buffer,const int * attrib_list)1470 XMesaBindTexImage(Display *dpy, XMesaBuffer drawable, int buffer,
1471 const int *attrib_list)
1472 {
1473 struct st_context_iface *st = stapi->get_current(stapi);
1474 struct st_framebuffer_iface* stfbi = drawable->stfb;
1475 struct pipe_resource *res;
1476 int x, y, w, h;
1477 enum st_attachment_type st_attachment = xmesa_attachment_type(buffer);
1478
1479 x = 0;
1480 y = 0;
1481 w = drawable->width;
1482 h = drawable->height;
1483
1484 /* We need to validate our attachments before using them,
1485 * in case the texture doesn't exist yet. */
1486 xmesa_st_framebuffer_validate_textures(stfbi, w, h, 1 << st_attachment);
1487 res = xmesa_get_attachment(stfbi, st_attachment);
1488
1489 if (res) {
1490 struct pipe_context* pipe = xmesa_get_context(stfbi);
1491 enum pipe_format internal_format = res->format;
1492 struct pipe_transfer *tex_xfer;
1493 char *map;
1494 int line, byte_width;
1495 XImage *img;
1496
1497 internal_format = choose_pixel_format(drawable->xm_visual);
1498
1499 map = pipe_texture_map(pipe, res,
1500 0, 0, /* level, layer */
1501 PIPE_MAP_WRITE,
1502 x, y,
1503 w, h, &tex_xfer);
1504 if (!map)
1505 return;
1506
1507 /* Grab the XImage that we want to turn into a texture. */
1508 img = XGetImage(dpy,
1509 drawable->ws.drawable,
1510 x, y,
1511 w, h,
1512 AllPlanes,
1513 ZPixmap);
1514
1515 if (!img) {
1516 pipe_texture_unmap(pipe, tex_xfer);
1517 return;
1518 }
1519
1520 /* The pipe transfer has a pitch rounded up to the nearest 64 pixels. */
1521 byte_width = w * ((img->bits_per_pixel + 7) / 8);
1522
1523 for (line = 0; line < h; line++)
1524 memcpy(&map[line * tex_xfer->stride],
1525 &img->data[line * img->bytes_per_line],
1526 byte_width);
1527
1528 pipe_texture_unmap(pipe, tex_xfer);
1529
1530 st->teximage(st,
1531 ST_TEXTURE_2D,
1532 0, /* level */
1533 internal_format,
1534 res,
1535 FALSE /* no mipmap */);
1536
1537 }
1538 }
1539
1540
1541
1542 PUBLIC void
XMesaReleaseTexImage(Display * dpy,XMesaBuffer drawable,int buffer)1543 XMesaReleaseTexImage(Display *dpy, XMesaBuffer drawable, int buffer)
1544 {
1545 }
1546
1547
1548 void
XMesaCopyContext(XMesaContext src,XMesaContext dst,unsigned long mask)1549 XMesaCopyContext(XMesaContext src, XMesaContext dst, unsigned long mask)
1550 {
1551 if (dst->st->copy)
1552 dst->st->copy(dst->st, src->st, mask);
1553 }
1554