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
65 #include "util/u_atomic.h"
66 #include "util/u_inlines.h"
67
68 #include "hud/hud_context.h"
69
70 #include "xm_public.h"
71 #include <GL/glx.h>
72
73
74 /* Driver interface routines, set up by xlib backend on library
75 * _init(). These are global in the same way that function names are
76 * global.
77 */
78 static struct xm_driver driver;
79 static struct st_api *stapi;
80
81 /* Default strict invalidate to false. This means we will not call
82 * XGetGeometry after every swapbuffers, which allows swapbuffers to
83 * remain asynchronous. For apps running at 100fps with synchronous
84 * swapping, a 10% boost is typical. For gears, I see closer to 20%
85 * speedup.
86 *
87 * Note that the work of copying data on swapbuffers doesn't disappear
88 * - this change just allows the X server to execute the PutImage
89 * asynchronously without us effectively blocked until its completion.
90 *
91 * This speeds up even llvmpipe's threaded rasterization as the
92 * swapbuffers operation was a large part of the serial component of
93 * an llvmpipe frame.
94 *
95 * The downside of this is correctness - applications which don't call
96 * glViewport on window resizes will get incorrect rendering. A
97 * better solution would be to have per-frame but asynchronous
98 * invalidation. Xcb almost looks as if it could provide this, but
99 * the API doesn't seem to quite be there.
100 */
101 boolean xmesa_strict_invalidate = FALSE;
102
xmesa_set_driver(const struct xm_driver * templ)103 void xmesa_set_driver( const struct xm_driver *templ )
104 {
105 driver = *templ;
106 stapi = driver.create_st_api();
107
108 xmesa_strict_invalidate =
109 debug_get_bool_option("XMESA_STRICT_INVALIDATE", FALSE);
110 }
111
112
113 static int
xmesa_get_param(struct st_manager * smapi,enum st_manager_param param)114 xmesa_get_param(struct st_manager *smapi,
115 enum st_manager_param param)
116 {
117 switch(param) {
118 case ST_MANAGER_BROKEN_INVALIDATE:
119 return !xmesa_strict_invalidate;
120 default:
121 return 0;
122 }
123 }
124
125 /* linked list of XMesaDisplay hooks per display */
126 typedef struct _XMesaExtDisplayInfo {
127 struct _XMesaExtDisplayInfo *next;
128 Display *display;
129 struct xmesa_display mesaDisplay;
130 } XMesaExtDisplayInfo;
131
132 typedef struct _XMesaExtInfo {
133 XMesaExtDisplayInfo *head;
134 int ndisplays;
135 } XMesaExtInfo;
136
137 static XMesaExtInfo MesaExtInfo;
138
139 /* hook to delete XMesaDisplay on XDestroyDisplay */
140 extern void
xmesa_close_display(Display * display)141 xmesa_close_display(Display *display)
142 {
143 XMesaExtDisplayInfo *info, *prev;
144
145 /* These assertions are not valid since screen creation can fail and result
146 * in an empty list
147 assert(MesaExtInfo.ndisplays > 0);
148 assert(MesaExtInfo.head);
149 */
150
151 _XLockMutex(_Xglobal_lock);
152 /* first find display */
153 prev = NULL;
154 for (info = MesaExtInfo.head; info; info = info->next) {
155 if (info->display == display) {
156 prev = info;
157 break;
158 }
159 }
160
161 if (info == NULL) {
162 /* no display found */
163 _XUnlockMutex(_Xglobal_lock);
164 return;
165 }
166
167 /* remove display entry from list */
168 if (prev != MesaExtInfo.head) {
169 prev->next = info->next;
170 } else {
171 MesaExtInfo.head = info->next;
172 }
173 MesaExtInfo.ndisplays--;
174
175 _XUnlockMutex(_Xglobal_lock);
176
177 /* don't forget to clean up mesaDisplay */
178 XMesaDisplay xmdpy = &info->mesaDisplay;
179
180 /**
181 * XXX: Don't destroy the screens here, since there may still
182 * be some dangling screen pointers that are used after this point
183 * if (xmdpy->screen) {
184 * xmdpy->screen->destroy(xmdpy->screen);
185 * }
186 */
187
188 if (xmdpy->smapi->destroy)
189 xmdpy->smapi->destroy(xmdpy->smapi);
190 free(xmdpy->smapi);
191
192 XFree((char *) info);
193 }
194
195 static XMesaDisplay
xmesa_init_display(Display * display)196 xmesa_init_display( Display *display )
197 {
198 static mtx_t init_mutex = _MTX_INITIALIZER_NP;
199 XMesaDisplay xmdpy;
200 XMesaExtDisplayInfo *info;
201
202 if (display == NULL) {
203 return NULL;
204 }
205
206 mtx_lock(&init_mutex);
207
208 /* Look for XMesaDisplay which corresponds to this display */
209 info = MesaExtInfo.head;
210 while(info) {
211 if (info->display == display) {
212 /* Found it */
213 mtx_unlock(&init_mutex);
214 return &info->mesaDisplay;
215 }
216 info = info->next;
217 }
218
219 /* Not found. Create new XMesaDisplay */
220 /* first allocate X-related resources and hook destroy callback */
221
222 /* allocate mesa display info */
223 info = (XMesaExtDisplayInfo *) Xmalloc(sizeof(XMesaExtDisplayInfo));
224 if (info == NULL) {
225 mtx_unlock(&init_mutex);
226 return NULL;
227 }
228 info->display = display;
229
230 xmdpy = &info->mesaDisplay; /* to be filled out below */
231 xmdpy->display = display;
232 xmdpy->pipe = NULL;
233
234 xmdpy->smapi = CALLOC_STRUCT(st_manager);
235 if (!xmdpy->smapi) {
236 Xfree(info);
237 mtx_unlock(&init_mutex);
238 return NULL;
239 }
240
241 xmdpy->screen = driver.create_pipe_screen(display);
242 if (!xmdpy->screen) {
243 free(xmdpy->smapi);
244 Xfree(info);
245 mtx_unlock(&init_mutex);
246 return NULL;
247 }
248
249 /* At this point, both smapi and screen are known to be valid */
250 xmdpy->smapi->screen = xmdpy->screen;
251 xmdpy->smapi->get_param = xmesa_get_param;
252 (void) mtx_init(&xmdpy->mutex, mtx_plain);
253
254 /* chain to the list of displays */
255 _XLockMutex(_Xglobal_lock);
256 info->next = MesaExtInfo.head;
257 MesaExtInfo.head = info;
258 MesaExtInfo.ndisplays++;
259 _XUnlockMutex(_Xglobal_lock);
260
261 mtx_unlock(&init_mutex);
262
263 return xmdpy;
264 }
265
266
267 /**********************************************************************/
268 /***** X Utility Functions *****/
269 /**********************************************************************/
270
271
272 /**
273 * Return the host's byte order as LSBFirst or MSBFirst ala X.
274 */
host_byte_order(void)275 static int host_byte_order( void )
276 {
277 int i = 1;
278 char *cptr = (char *) &i;
279 return (*cptr==1) ? LSBFirst : MSBFirst;
280 }
281
282
283
284
285 /**
286 * Return the true number of bits per pixel for XImages.
287 * For example, if we request a 24-bit deep visual we may actually need/get
288 * 32bpp XImages. This function returns the appropriate bpp.
289 * Input: dpy - the X display
290 * visinfo - desribes the visual to be used for XImages
291 * Return: true number of bits per pixel for XImages
292 */
293 static int
bits_per_pixel(XMesaVisual xmv)294 bits_per_pixel( XMesaVisual xmv )
295 {
296 Display *dpy = xmv->display;
297 XVisualInfo * visinfo = xmv->visinfo;
298 XImage *img;
299 int bitsPerPixel;
300 /* Create a temporary XImage */
301 img = XCreateImage( dpy, visinfo->visual, visinfo->depth,
302 ZPixmap, 0, /*format, offset*/
303 malloc(8), /*data*/
304 1, 1, /*width, height*/
305 32, /*bitmap_pad*/
306 0 /*bytes_per_line*/
307 );
308 assert(img);
309 /* grab the bits/pixel value */
310 bitsPerPixel = img->bits_per_pixel;
311 /* free the XImage */
312 free( img->data );
313 img->data = NULL;
314 XDestroyImage( img );
315 return bitsPerPixel;
316 }
317
318
319
320 /*
321 * Determine if a given X window ID is valid (window exists).
322 * Do this by calling XGetWindowAttributes() for the window and
323 * checking if we catch an X error.
324 * Input: dpy - the display
325 * win - the window to check for existence
326 * Return: GL_TRUE - window exists
327 * GL_FALSE - window doesn't exist
328 */
329 static GLboolean WindowExistsFlag;
330
window_exists_err_handler(Display * dpy,XErrorEvent * xerr)331 static int window_exists_err_handler( Display* dpy, XErrorEvent* xerr )
332 {
333 (void) dpy;
334 if (xerr->error_code == BadWindow) {
335 WindowExistsFlag = GL_FALSE;
336 }
337 return 0;
338 }
339
window_exists(Display * dpy,Window win)340 static GLboolean window_exists( Display *dpy, Window win )
341 {
342 XWindowAttributes wa;
343 int (*old_handler)( Display*, XErrorEvent* );
344 WindowExistsFlag = GL_TRUE;
345 old_handler = XSetErrorHandler(window_exists_err_handler);
346 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */
347 XSetErrorHandler(old_handler);
348 return WindowExistsFlag;
349 }
350
351 static Status
get_drawable_size(Display * dpy,Drawable d,uint * width,uint * height)352 get_drawable_size( Display *dpy, Drawable d, uint *width, uint *height )
353 {
354 Window root;
355 Status stat;
356 int xpos, ypos;
357 unsigned int w, h, bw, depth;
358 stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth);
359 *width = w;
360 *height = h;
361 return stat;
362 }
363
364
365 /**
366 * Return the size of the window (or pixmap) that corresponds to the
367 * given XMesaBuffer.
368 * \param width returns width in pixels
369 * \param height returns height in pixels
370 */
371 void
xmesa_get_window_size(Display * dpy,XMesaBuffer b,GLuint * width,GLuint * height)372 xmesa_get_window_size(Display *dpy, XMesaBuffer b,
373 GLuint *width, GLuint *height)
374 {
375 XMesaDisplay xmdpy = xmesa_init_display(dpy);
376 Status stat;
377
378 mtx_lock(&xmdpy->mutex);
379 stat = get_drawable_size(dpy, b->ws.drawable, width, height);
380 mtx_unlock(&xmdpy->mutex);
381
382 if (!stat) {
383 /* probably querying a window that's recently been destroyed */
384 _mesa_warning(NULL, "XGetGeometry failed!\n");
385 *width = *height = 1;
386 }
387 }
388
389 #define GET_REDMASK(__v) __v->mesa_visual.redMask
390 #define GET_GREENMASK(__v) __v->mesa_visual.greenMask
391 #define GET_BLUEMASK(__v) __v->mesa_visual.blueMask
392
393
394 /**
395 * Choose the pixel format for the given visual.
396 * This will tell the gallium driver how to pack pixel data into
397 * drawing surfaces.
398 */
399 static GLuint
choose_pixel_format(XMesaVisual v)400 choose_pixel_format(XMesaVisual v)
401 {
402 boolean native_byte_order = (host_byte_order() ==
403 ImageByteOrder(v->display));
404
405 if ( GET_REDMASK(v) == 0x0000ff
406 && GET_GREENMASK(v) == 0x00ff00
407 && GET_BLUEMASK(v) == 0xff0000
408 && v->BitsPerPixel == 32) {
409 if (native_byte_order) {
410 /* no byteswapping needed */
411 return PIPE_FORMAT_RGBA8888_UNORM;
412 }
413 else {
414 return PIPE_FORMAT_ABGR8888_UNORM;
415 }
416 }
417 else if ( GET_REDMASK(v) == 0xff0000
418 && GET_GREENMASK(v) == 0x00ff00
419 && GET_BLUEMASK(v) == 0x0000ff
420 && v->BitsPerPixel == 32) {
421 if (native_byte_order) {
422 /* no byteswapping needed */
423 return PIPE_FORMAT_BGRA8888_UNORM;
424 }
425 else {
426 return PIPE_FORMAT_ARGB8888_UNORM;
427 }
428 }
429 else if ( GET_REDMASK(v) == 0x0000ff00
430 && GET_GREENMASK(v) == 0x00ff0000
431 && GET_BLUEMASK(v) == 0xff000000
432 && v->BitsPerPixel == 32) {
433 if (native_byte_order) {
434 /* no byteswapping needed */
435 return PIPE_FORMAT_ARGB8888_UNORM;
436 }
437 else {
438 return PIPE_FORMAT_BGRA8888_UNORM;
439 }
440 }
441 else if ( GET_REDMASK(v) == 0xf800
442 && GET_GREENMASK(v) == 0x07e0
443 && GET_BLUEMASK(v) == 0x001f
444 && native_byte_order
445 && v->BitsPerPixel == 16) {
446 /* 5-6-5 RGB */
447 return PIPE_FORMAT_B5G6R5_UNORM;
448 }
449
450 return PIPE_FORMAT_NONE;
451 }
452
453
454 /**
455 * Choose a depth/stencil format that satisfies the given depth and
456 * stencil sizes.
457 */
458 static enum pipe_format
choose_depth_stencil_format(XMesaDisplay xmdpy,int depth,int stencil,int sample_count)459 choose_depth_stencil_format(XMesaDisplay xmdpy, int depth, int stencil,
460 int sample_count)
461 {
462 const enum pipe_texture_target target = PIPE_TEXTURE_2D;
463 const unsigned tex_usage = PIPE_BIND_DEPTH_STENCIL;
464 enum pipe_format formats[8], fmt;
465 int count, i;
466
467 count = 0;
468
469 if (depth <= 16 && stencil == 0) {
470 formats[count++] = PIPE_FORMAT_Z16_UNORM;
471 }
472 if (depth <= 24 && stencil == 0) {
473 formats[count++] = PIPE_FORMAT_X8Z24_UNORM;
474 formats[count++] = PIPE_FORMAT_Z24X8_UNORM;
475 }
476 if (depth <= 24 && stencil <= 8) {
477 formats[count++] = PIPE_FORMAT_S8_UINT_Z24_UNORM;
478 formats[count++] = PIPE_FORMAT_Z24_UNORM_S8_UINT;
479 }
480 if (depth <= 32 && stencil == 0) {
481 formats[count++] = PIPE_FORMAT_Z32_UNORM;
482 }
483
484 fmt = PIPE_FORMAT_NONE;
485 for (i = 0; i < count; i++) {
486 if (xmdpy->screen->is_format_supported(xmdpy->screen, formats[i],
487 target, sample_count,
488 tex_usage)) {
489 fmt = formats[i];
490 break;
491 }
492 }
493
494 return fmt;
495 }
496
497
498
499 /**********************************************************************/
500 /***** Linked list of XMesaBuffers *****/
501 /**********************************************************************/
502
503 static XMesaBuffer XMesaBufferList = NULL;
504
505
506 /**
507 * Allocate a new XMesaBuffer object which corresponds to the given drawable.
508 * Note that XMesaBuffer is derived from struct gl_framebuffer.
509 * The new XMesaBuffer will not have any size (Width=Height=0).
510 *
511 * \param d the corresponding X drawable (window or pixmap)
512 * \param type either WINDOW, PIXMAP or PBUFFER, describing d
513 * \param vis the buffer's visual
514 * \param cmap the window's colormap, if known.
515 * \return new XMesaBuffer or NULL if any problem
516 */
517 static XMesaBuffer
create_xmesa_buffer(Drawable d,BufferType type,XMesaVisual vis,Colormap cmap)518 create_xmesa_buffer(Drawable d, BufferType type,
519 XMesaVisual vis, Colormap cmap)
520 {
521 XMesaDisplay xmdpy = xmesa_init_display(vis->display);
522 XMesaBuffer b;
523
524 assert(type == WINDOW || type == PIXMAP || type == PBUFFER);
525
526 if (!xmdpy)
527 return NULL;
528
529 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer);
530 if (!b)
531 return NULL;
532
533 b->ws.drawable = d;
534 b->ws.visual = vis->visinfo->visual;
535 b->ws.depth = vis->visinfo->depth;
536
537 b->xm_visual = vis;
538 b->type = type;
539 b->cmap = cmap;
540
541 get_drawable_size(vis->display, d, &b->width, &b->height);
542
543 /*
544 * Create framebuffer, but we'll plug in our own renderbuffers below.
545 */
546 b->stfb = xmesa_create_st_framebuffer(xmdpy, b);
547
548 /* GLX_EXT_texture_from_pixmap */
549 b->TextureTarget = 0;
550 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT;
551 b->TextureMipmap = 0;
552
553 /* insert buffer into linked list */
554 b->Next = XMesaBufferList;
555 XMesaBufferList = b;
556
557 return b;
558 }
559
560
561 /**
562 * Find an XMesaBuffer by matching X display and colormap but NOT matching
563 * the notThis buffer.
564 */
565 XMesaBuffer
xmesa_find_buffer(Display * dpy,Colormap cmap,XMesaBuffer notThis)566 xmesa_find_buffer(Display *dpy, Colormap cmap, XMesaBuffer notThis)
567 {
568 XMesaBuffer b;
569 for (b = XMesaBufferList; b; b = b->Next) {
570 if (b->xm_visual->display == dpy &&
571 b->cmap == cmap &&
572 b != notThis) {
573 return b;
574 }
575 }
576 return NULL;
577 }
578
579
580 /**
581 * Remove buffer from linked list, delete if no longer referenced.
582 */
583 static void
xmesa_free_buffer(XMesaBuffer buffer)584 xmesa_free_buffer(XMesaBuffer buffer)
585 {
586 XMesaBuffer prev = NULL, b;
587
588 for (b = XMesaBufferList; b; b = b->Next) {
589 if (b == buffer) {
590 /* unlink buffer from list */
591 if (prev)
592 prev->Next = buffer->Next;
593 else
594 XMesaBufferList = buffer->Next;
595
596 /* Since the X window for the XMesaBuffer is going away, we don't
597 * want to dereference this pointer in the future.
598 */
599 b->ws.drawable = 0;
600
601 /* Notify the st manager that the associated framebuffer interface
602 * object is no longer valid.
603 */
604 stapi->destroy_drawable(stapi, buffer->stfb);
605
606 /* XXX we should move the buffer to a delete-pending list and destroy
607 * the buffer until it is no longer current.
608 */
609 xmesa_destroy_st_framebuffer(buffer->stfb);
610
611 free(buffer);
612
613 return;
614 }
615 /* continue search */
616 prev = b;
617 }
618 /* buffer not found in XMesaBufferList */
619 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n");
620 }
621
622
623
624 /**********************************************************************/
625 /***** Misc Private Functions *****/
626 /**********************************************************************/
627
628
629 /**
630 * When a context is bound for the first time, we can finally finish
631 * initializing the context's visual and buffer information.
632 * \param v the XMesaVisual to initialize
633 * \param b the XMesaBuffer to initialize (may be NULL)
634 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode
635 * \param window the window/pixmap we're rendering into
636 * \param cmap the colormap associated with the window/pixmap
637 * \return GL_TRUE=success, GL_FALSE=failure
638 */
639 static GLboolean
initialize_visual_and_buffer(XMesaVisual v,XMesaBuffer b,GLboolean rgb_flag,Drawable window,Colormap cmap)640 initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b,
641 GLboolean rgb_flag, Drawable window,
642 Colormap cmap)
643 {
644 assert(!b || b->xm_visual == v);
645
646 /* Save true bits/pixel */
647 v->BitsPerPixel = bits_per_pixel(v);
648 assert(v->BitsPerPixel > 0);
649
650 if (rgb_flag == GL_FALSE) {
651 /* COLOR-INDEXED WINDOW: not supported*/
652 return GL_FALSE;
653 }
654 else {
655 /* RGB WINDOW:
656 * We support RGB rendering into almost any kind of visual.
657 */
658 const int xclass = v->visualType;
659 if (xclass != GLX_TRUE_COLOR && xclass == !GLX_DIRECT_COLOR) {
660 _mesa_warning(NULL,
661 "XMesa: RGB mode rendering not supported in given visual.\n");
662 return GL_FALSE;
663 }
664 v->mesa_visual.indexBits = 0;
665
666 if (v->BitsPerPixel == 32) {
667 /* We use XImages for all front/back buffers. If an X Window or
668 * X Pixmap is 32bpp, there's no guarantee that the alpha channel
669 * will be preserved. For XImages we're in luck.
670 */
671 v->mesa_visual.alphaBits = 8;
672 }
673 }
674
675 /*
676 * If MESA_INFO env var is set print out some debugging info
677 * which can help Brian figure out what's going on when a user
678 * reports bugs.
679 */
680 if (getenv("MESA_INFO")) {
681 printf("X/Mesa visual = %p\n", (void *) v);
682 printf("X/Mesa level = %d\n", v->mesa_visual.level);
683 printf("X/Mesa depth = %d\n", v->visinfo->depth);
684 printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel);
685 }
686
687 return GL_TRUE;
688 }
689
690
691
692 #define NUM_VISUAL_TYPES 6
693
694 /**
695 * Convert an X visual type to a GLX visual type.
696 *
697 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.)
698 * to be converted.
699 * \return If \c visualType is a valid X visual type, a GLX visual type will
700 * be returned. Otherwise \c GLX_NONE will be returned.
701 *
702 * \note
703 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the
704 * DRI CVS tree.
705 */
706 static GLint
xmesa_convert_from_x_visual_type(int visualType)707 xmesa_convert_from_x_visual_type( int visualType )
708 {
709 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = {
710 GLX_STATIC_GRAY, GLX_GRAY_SCALE,
711 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR,
712 GLX_TRUE_COLOR, GLX_DIRECT_COLOR
713 };
714
715 return ( (unsigned) visualType < NUM_VISUAL_TYPES )
716 ? glx_visual_types[ visualType ] : GLX_NONE;
717 }
718
719
720 /**********************************************************************/
721 /***** Public Functions *****/
722 /**********************************************************************/
723
724
725 /*
726 * Create a new X/Mesa visual.
727 * Input: display - X11 display
728 * visinfo - an XVisualInfo pointer
729 * rgb_flag - GL_TRUE = RGB mode,
730 * GL_FALSE = color index mode
731 * alpha_flag - alpha buffer requested?
732 * db_flag - GL_TRUE = double-buffered,
733 * GL_FALSE = single buffered
734 * stereo_flag - stereo visual?
735 * ximage_flag - GL_TRUE = use an XImage for back buffer,
736 * GL_FALSE = use an off-screen pixmap for back buffer
737 * depth_size - requested bits/depth values, or zero
738 * stencil_size - requested bits/stencil values, or zero
739 * accum_red_size - requested bits/red accum values, or zero
740 * accum_green_size - requested bits/green accum values, or zero
741 * accum_blue_size - requested bits/blue accum values, or zero
742 * accum_alpha_size - requested bits/alpha accum values, or zero
743 * num_samples - number of samples/pixel if multisampling, or zero
744 * level - visual level, usually 0
745 * visualCaveat - ala the GLX extension, usually GLX_NONE
746 * Return; a new XMesaVisual or 0 if error.
747 */
748 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)749 XMesaVisual XMesaCreateVisual( Display *display,
750 XVisualInfo * visinfo,
751 GLboolean rgb_flag,
752 GLboolean alpha_flag,
753 GLboolean db_flag,
754 GLboolean stereo_flag,
755 GLboolean ximage_flag,
756 GLint depth_size,
757 GLint stencil_size,
758 GLint accum_red_size,
759 GLint accum_green_size,
760 GLint accum_blue_size,
761 GLint accum_alpha_size,
762 GLint num_samples,
763 GLint level,
764 GLint visualCaveat )
765 {
766 XMesaDisplay xmdpy = xmesa_init_display(display);
767 XMesaVisual v;
768 GLint red_bits, green_bits, blue_bits, alpha_bits;
769
770 if (!xmdpy)
771 return NULL;
772
773 /* For debugging only */
774 if (getenv("MESA_XSYNC")) {
775 /* This makes debugging X easier.
776 * In your debugger, set a breakpoint on _XError to stop when an
777 * X protocol error is generated.
778 */
779 XSynchronize( display, 1 );
780 }
781
782 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual);
783 if (!v) {
784 return NULL;
785 }
786
787 v->display = display;
788
789 /* Save a copy of the XVisualInfo struct because the user may Xfree()
790 * the struct but we may need some of the information contained in it
791 * at a later time.
792 */
793 v->visinfo = malloc(sizeof(*visinfo));
794 if (!v->visinfo) {
795 free(v);
796 return NULL;
797 }
798 memcpy(v->visinfo, visinfo, sizeof(*visinfo));
799
800 v->ximage_flag = ximage_flag;
801
802 v->mesa_visual.redMask = visinfo->red_mask;
803 v->mesa_visual.greenMask = visinfo->green_mask;
804 v->mesa_visual.blueMask = visinfo->blue_mask;
805 v->visualID = visinfo->visualid;
806 v->screen = visinfo->screen;
807
808 #if !(defined(__cplusplus) || defined(c_plusplus))
809 v->visualType = xmesa_convert_from_x_visual_type(visinfo->class);
810 #else
811 v->visualType = xmesa_convert_from_x_visual_type(visinfo->c_class);
812 #endif
813
814 v->mesa_visual.visualRating = visualCaveat;
815
816 if (alpha_flag)
817 v->mesa_visual.alphaBits = 8;
818
819 (void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 );
820
821 {
822 const int xclass = v->visualType;
823 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
824 red_bits = _mesa_bitcount(GET_REDMASK(v));
825 green_bits = _mesa_bitcount(GET_GREENMASK(v));
826 blue_bits = _mesa_bitcount(GET_BLUEMASK(v));
827 }
828 else {
829 /* this is an approximation */
830 int depth;
831 depth = v->visinfo->depth;
832 red_bits = depth / 3;
833 depth -= red_bits;
834 green_bits = depth / 2;
835 depth -= green_bits;
836 blue_bits = depth;
837 alpha_bits = 0;
838 assert( red_bits + green_bits + blue_bits == v->visinfo->depth );
839 }
840 alpha_bits = v->mesa_visual.alphaBits;
841 }
842
843 /* initialize visual */
844 {
845 struct gl_config *vis = &v->mesa_visual;
846
847 vis->rgbMode = GL_TRUE;
848 vis->doubleBufferMode = db_flag;
849 vis->stereoMode = stereo_flag;
850
851 vis->redBits = red_bits;
852 vis->greenBits = green_bits;
853 vis->blueBits = blue_bits;
854 vis->alphaBits = alpha_bits;
855 vis->rgbBits = red_bits + green_bits + blue_bits;
856
857 vis->indexBits = 0;
858 vis->depthBits = depth_size;
859 vis->stencilBits = stencil_size;
860
861 vis->accumRedBits = accum_red_size;
862 vis->accumGreenBits = accum_green_size;
863 vis->accumBlueBits = accum_blue_size;
864 vis->accumAlphaBits = accum_alpha_size;
865
866 vis->haveAccumBuffer = accum_red_size > 0;
867 vis->haveDepthBuffer = depth_size > 0;
868 vis->haveStencilBuffer = stencil_size > 0;
869
870 vis->numAuxBuffers = 0;
871 vis->level = 0;
872 vis->sampleBuffers = num_samples > 1;
873 vis->samples = num_samples;
874 }
875
876 v->stvis.buffer_mask = ST_ATTACHMENT_FRONT_LEFT_MASK;
877 if (db_flag)
878 v->stvis.buffer_mask |= ST_ATTACHMENT_BACK_LEFT_MASK;
879 if (stereo_flag) {
880 v->stvis.buffer_mask |= ST_ATTACHMENT_FRONT_RIGHT_MASK;
881 if (db_flag)
882 v->stvis.buffer_mask |= ST_ATTACHMENT_BACK_RIGHT_MASK;
883 }
884
885 v->stvis.color_format = choose_pixel_format(v);
886
887 /* Check format support at requested num_samples (for multisample) */
888 if (!xmdpy->screen->is_format_supported(xmdpy->screen,
889 v->stvis.color_format,
890 PIPE_TEXTURE_2D, num_samples,
891 PIPE_BIND_RENDER_TARGET))
892 v->stvis.color_format = PIPE_FORMAT_NONE;
893
894 if (v->stvis.color_format == PIPE_FORMAT_NONE) {
895 free(v->visinfo);
896 free(v);
897 return NULL;
898 }
899
900 v->stvis.depth_stencil_format =
901 choose_depth_stencil_format(xmdpy, depth_size, stencil_size,
902 num_samples);
903
904 v->stvis.accum_format = (accum_red_size +
905 accum_green_size + accum_blue_size + accum_alpha_size) ?
906 PIPE_FORMAT_R16G16B16A16_SNORM : PIPE_FORMAT_NONE;
907
908 v->stvis.samples = num_samples;
909 v->stvis.render_buffer = ST_ATTACHMENT_INVALID;
910
911 /* XXX minor hack */
912 v->mesa_visual.level = level;
913 return v;
914 }
915
916
917 PUBLIC
XMesaDestroyVisual(XMesaVisual v)918 void XMesaDestroyVisual( XMesaVisual v )
919 {
920 free(v->visinfo);
921 free(v);
922 }
923
924
925 /**
926 * Return the informative name.
927 */
928 const char *
xmesa_get_name(void)929 xmesa_get_name(void)
930 {
931 return stapi->name;
932 }
933
934
935 /**
936 * Do per-display initializations.
937 */
938 int
xmesa_init(Display * display)939 xmesa_init( Display *display )
940 {
941 return xmesa_init_display(display) ? 0 : 1;
942 }
943
944
945 /**
946 * Create a new XMesaContext.
947 * \param v the XMesaVisual
948 * \param share_list another XMesaContext with which to share display
949 * lists or NULL if no sharing is wanted.
950 * \return an XMesaContext or NULL if error.
951 */
952 PUBLIC
XMesaCreateContext(XMesaVisual v,XMesaContext share_list,GLuint major,GLuint minor,GLuint profileMask,GLuint contextFlags)953 XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list,
954 GLuint major, GLuint minor,
955 GLuint profileMask, GLuint contextFlags)
956 {
957 XMesaDisplay xmdpy = xmesa_init_display(v->display);
958 struct st_context_attribs attribs;
959 enum st_context_error ctx_err = 0;
960 XMesaContext c;
961
962 if (!xmdpy)
963 goto no_xmesa_context;
964
965 /* Note: the XMesaContext contains a Mesa struct gl_context struct (inheritance) */
966 c = (XMesaContext) CALLOC_STRUCT(xmesa_context);
967 if (!c)
968 goto no_xmesa_context;
969
970 c->xm_visual = v;
971 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */
972 c->xm_read_buffer = NULL;
973
974 memset(&attribs, 0, sizeof(attribs));
975 attribs.visual = v->stvis;
976 attribs.major = major;
977 attribs.minor = minor;
978 if (contextFlags & GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB)
979 attribs.flags |= ST_CONTEXT_FLAG_FORWARD_COMPATIBLE;
980 if (contextFlags & GLX_CONTEXT_DEBUG_BIT_ARB)
981 attribs.flags |= ST_CONTEXT_FLAG_DEBUG;
982 if (contextFlags & GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB)
983 attribs.flags |= ST_CONTEXT_FLAG_ROBUST_ACCESS;
984
985 switch (profileMask) {
986 case GLX_CONTEXT_CORE_PROFILE_BIT_ARB:
987 /* There are no profiles before OpenGL 3.2. The
988 * GLX_ARB_create_context_profile spec says:
989 *
990 * "If the requested OpenGL version is less than 3.2,
991 * GLX_CONTEXT_PROFILE_MASK_ARB is ignored and the functionality
992 * of the context is determined solely by the requested version."
993 */
994 if (major > 3 || (major == 3 && minor >= 2)) {
995 attribs.profile = ST_PROFILE_OPENGL_CORE;
996 break;
997 }
998 /* fall-through */
999 case GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB:
1000 /*
1001 * The spec also says:
1002 *
1003 * "If version 3.1 is requested, the context returned may implement
1004 * any of the following versions:
1005 *
1006 * * Version 3.1. The GL_ARB_compatibility extension may or may not
1007 * be implemented, as determined by the implementation.
1008 * * The core profile of version 3.2 or greater."
1009 *
1010 * and because Mesa doesn't support GL_ARB_compatibility, the only chance to
1011 * honour a 3.1 context is through core profile.
1012 */
1013 if (major == 3 && minor == 1) {
1014 attribs.profile = ST_PROFILE_OPENGL_CORE;
1015 } else {
1016 attribs.profile = ST_PROFILE_DEFAULT;
1017 }
1018 break;
1019 case GLX_CONTEXT_ES_PROFILE_BIT_EXT:
1020 if (major >= 2) {
1021 attribs.profile = ST_PROFILE_OPENGL_ES2;
1022 } else {
1023 attribs.profile = ST_PROFILE_OPENGL_ES1;
1024 }
1025 break;
1026 default:
1027 assert(0);
1028 goto no_st;
1029 }
1030
1031 c->st = stapi->create_context(stapi, xmdpy->smapi, &attribs,
1032 &ctx_err, (share_list) ? share_list->st : NULL);
1033 if (c->st == NULL)
1034 goto no_st;
1035
1036 c->st->st_manager_private = (void *) c;
1037
1038 c->hud = hud_create(c->st->cso_context, NULL);
1039
1040 return c;
1041
1042 no_st:
1043 free(c);
1044 no_xmesa_context:
1045 return NULL;
1046 }
1047
1048
1049
1050 PUBLIC
XMesaDestroyContext(XMesaContext c)1051 void XMesaDestroyContext( XMesaContext c )
1052 {
1053 if (c->hud) {
1054 hud_destroy(c->hud, NULL);
1055 }
1056
1057 c->st->destroy(c->st);
1058
1059 /* FIXME: We should destroy the screen here, but if we do so, surfaces may
1060 * outlive it, causing segfaults
1061 struct pipe_screen *screen = c->st->pipe->screen;
1062 screen->destroy(screen);
1063 */
1064
1065 free(c);
1066 }
1067
1068
1069
1070 /**
1071 * Private function for creating an XMesaBuffer which corresponds to an
1072 * X window or pixmap.
1073 * \param v the window's XMesaVisual
1074 * \param w the window we're wrapping
1075 * \return new XMesaBuffer or NULL if error
1076 */
1077 PUBLIC XMesaBuffer
XMesaCreateWindowBuffer(XMesaVisual v,Window w)1078 XMesaCreateWindowBuffer(XMesaVisual v, Window w)
1079 {
1080 XWindowAttributes attr;
1081 XMesaBuffer b;
1082 Colormap cmap;
1083 int depth;
1084
1085 assert(v);
1086 assert(w);
1087
1088 /* Check that window depth matches visual depth */
1089 XGetWindowAttributes( v->display, w, &attr );
1090 depth = attr.depth;
1091 if (v->visinfo->depth != depth) {
1092 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
1093 v->visinfo->depth, depth);
1094 return NULL;
1095 }
1096
1097 /* Find colormap */
1098 if (attr.colormap) {
1099 cmap = attr.colormap;
1100 }
1101 else {
1102 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w);
1103 /* this is weird, a window w/out a colormap!? */
1104 /* OK, let's just allocate a new one and hope for the best */
1105 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone);
1106 }
1107
1108 b = create_xmesa_buffer((Drawable) w, WINDOW, v, cmap);
1109 if (!b)
1110 return NULL;
1111
1112 if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode,
1113 (Drawable) w, cmap )) {
1114 xmesa_free_buffer(b);
1115 return NULL;
1116 }
1117
1118 return b;
1119 }
1120
1121
1122
1123 /**
1124 * Create a new XMesaBuffer from an X pixmap.
1125 *
1126 * \param v the XMesaVisual
1127 * \param p the pixmap
1128 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or
1129 * \c GLX_DIRECT_COLOR visual for the pixmap
1130 * \returns new XMesaBuffer or NULL if error
1131 */
1132 PUBLIC XMesaBuffer
XMesaCreatePixmapBuffer(XMesaVisual v,Pixmap p,Colormap cmap)1133 XMesaCreatePixmapBuffer(XMesaVisual v, Pixmap p, Colormap cmap)
1134 {
1135 XMesaBuffer b;
1136
1137 assert(v);
1138
1139 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap);
1140 if (!b)
1141 return NULL;
1142
1143 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
1144 (Drawable) p, cmap)) {
1145 xmesa_free_buffer(b);
1146 return NULL;
1147 }
1148
1149 return b;
1150 }
1151
1152
1153 /**
1154 * For GLX_EXT_texture_from_pixmap
1155 */
1156 XMesaBuffer
XMesaCreatePixmapTextureBuffer(XMesaVisual v,Pixmap p,Colormap cmap,int format,int target,int mipmap)1157 XMesaCreatePixmapTextureBuffer(XMesaVisual v, Pixmap p,
1158 Colormap cmap,
1159 int format, int target, int mipmap)
1160 {
1161 GET_CURRENT_CONTEXT(ctx);
1162 XMesaBuffer b;
1163
1164 assert(v);
1165
1166 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap);
1167 if (!b)
1168 return NULL;
1169
1170 /* get pixmap size */
1171 xmesa_get_window_size(v->display, b, &b->width, &b->height);
1172
1173 if (target == 0) {
1174 /* examine dims */
1175 if (ctx->Extensions.ARB_texture_non_power_of_two) {
1176 target = GLX_TEXTURE_2D_EXT;
1177 }
1178 else if ( _mesa_bitcount(b->width) == 1
1179 && _mesa_bitcount(b->height) == 1) {
1180 /* power of two size */
1181 if (b->height == 1) {
1182 target = GLX_TEXTURE_1D_EXT;
1183 }
1184 else {
1185 target = GLX_TEXTURE_2D_EXT;
1186 }
1187 }
1188 else if (ctx->Extensions.NV_texture_rectangle) {
1189 target = GLX_TEXTURE_RECTANGLE_EXT;
1190 }
1191 else {
1192 /* non power of two textures not supported */
1193 XMesaDestroyBuffer(b);
1194 return 0;
1195 }
1196 }
1197
1198 b->TextureTarget = target;
1199 b->TextureFormat = format;
1200 b->TextureMipmap = mipmap;
1201
1202 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
1203 (Drawable) p, cmap)) {
1204 xmesa_free_buffer(b);
1205 return NULL;
1206 }
1207
1208 return b;
1209 }
1210
1211
1212
1213 XMesaBuffer
XMesaCreatePBuffer(XMesaVisual v,Colormap cmap,unsigned int width,unsigned int height)1214 XMesaCreatePBuffer(XMesaVisual v, Colormap cmap,
1215 unsigned int width, unsigned int height)
1216 {
1217 Window root;
1218 Drawable drawable; /* X Pixmap Drawable */
1219 XMesaBuffer b;
1220
1221 /* allocate pixmap for front buffer */
1222 root = RootWindow( v->display, v->visinfo->screen );
1223 drawable = XCreatePixmap(v->display, root, width, height,
1224 v->visinfo->depth);
1225 if (!drawable)
1226 return NULL;
1227
1228 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap);
1229 if (!b)
1230 return NULL;
1231
1232 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
1233 drawable, cmap)) {
1234 xmesa_free_buffer(b);
1235 return NULL;
1236 }
1237
1238 return b;
1239 }
1240
1241
1242
1243 /*
1244 * Deallocate an XMesaBuffer structure and all related info.
1245 */
1246 PUBLIC void
XMesaDestroyBuffer(XMesaBuffer b)1247 XMesaDestroyBuffer(XMesaBuffer b)
1248 {
1249 xmesa_free_buffer(b);
1250 }
1251
1252
1253 /**
1254 * Notify the binding context to validate the buffer.
1255 */
1256 void
xmesa_notify_invalid_buffer(XMesaBuffer b)1257 xmesa_notify_invalid_buffer(XMesaBuffer b)
1258 {
1259 p_atomic_inc(&b->stfb->stamp);
1260 }
1261
1262
1263 /**
1264 * Query the current drawable size and notify the binding context.
1265 */
1266 void
xmesa_check_buffer_size(XMesaBuffer b)1267 xmesa_check_buffer_size(XMesaBuffer b)
1268 {
1269 GLuint old_width, old_height;
1270
1271 if (b->type == PBUFFER)
1272 return;
1273
1274 old_width = b->width;
1275 old_height = b->height;
1276
1277 xmesa_get_window_size(b->xm_visual->display, b, &b->width, &b->height);
1278
1279 if (b->width != old_width || b->height != old_height)
1280 xmesa_notify_invalid_buffer(b);
1281 }
1282
1283
1284 /*
1285 * Bind buffer b to context c and make c the current rendering context.
1286 */
1287 PUBLIC
XMesaMakeCurrent2(XMesaContext c,XMesaBuffer drawBuffer,XMesaBuffer readBuffer)1288 GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer,
1289 XMesaBuffer readBuffer )
1290 {
1291 XMesaContext old_ctx = XMesaGetCurrentContext();
1292
1293 if (old_ctx && old_ctx != c) {
1294 XMesaFlush(old_ctx);
1295 old_ctx->xm_buffer = NULL;
1296 old_ctx->xm_read_buffer = NULL;
1297 }
1298
1299 if (c) {
1300 if (!drawBuffer || !readBuffer)
1301 return GL_FALSE; /* must specify buffers! */
1302
1303 if (c == old_ctx &&
1304 c->xm_buffer == drawBuffer &&
1305 c->xm_read_buffer == readBuffer)
1306 return GL_TRUE;
1307
1308 xmesa_check_buffer_size(drawBuffer);
1309 if (readBuffer != drawBuffer)
1310 xmesa_check_buffer_size(readBuffer);
1311
1312 c->xm_buffer = drawBuffer;
1313 c->xm_read_buffer = readBuffer;
1314
1315 stapi->make_current(stapi, c->st, drawBuffer->stfb, readBuffer->stfb);
1316
1317 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */
1318 drawBuffer->wasCurrent = GL_TRUE;
1319 }
1320 else {
1321 /* Detach */
1322 stapi->make_current(stapi, NULL, NULL, NULL);
1323
1324 }
1325 return GL_TRUE;
1326 }
1327
1328
1329 /*
1330 * Unbind the context c from its buffer.
1331 */
XMesaUnbindContext(XMesaContext c)1332 GLboolean XMesaUnbindContext( XMesaContext c )
1333 {
1334 /* A no-op for XFree86 integration purposes */
1335 return GL_TRUE;
1336 }
1337
1338
XMesaGetCurrentContext(void)1339 XMesaContext XMesaGetCurrentContext( void )
1340 {
1341 struct st_context_iface *st = stapi->get_current(stapi);
1342 return (XMesaContext) (st) ? st->st_manager_private : NULL;
1343 }
1344
1345
1346
1347 /**
1348 * Swap front and back color buffers and have winsys display front buffer.
1349 * If there's no front color buffer no swap actually occurs.
1350 */
1351 PUBLIC
XMesaSwapBuffers(XMesaBuffer b)1352 void XMesaSwapBuffers( XMesaBuffer b )
1353 {
1354 XMesaContext xmctx = XMesaGetCurrentContext();
1355
1356 /* Need to draw HUD before flushing */
1357 if (xmctx && xmctx->hud) {
1358 struct pipe_resource *back =
1359 xmesa_get_framebuffer_resource(b->stfb, ST_ATTACHMENT_BACK_LEFT);
1360 hud_run(xmctx->hud, NULL, back);
1361 }
1362
1363 if (xmctx && xmctx->xm_buffer == b) {
1364 xmctx->st->flush( xmctx->st, ST_FLUSH_FRONT, NULL);
1365 }
1366
1367 xmesa_swap_st_framebuffer(b->stfb);
1368 }
1369
1370
1371
1372 /*
1373 * Copy sub-region of back buffer to front buffer
1374 */
XMesaCopySubBuffer(XMesaBuffer b,int x,int y,int width,int height)1375 void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height )
1376 {
1377 XMesaContext xmctx = XMesaGetCurrentContext();
1378
1379 xmctx->st->flush( xmctx->st, ST_FLUSH_FRONT, NULL);
1380
1381 xmesa_copy_st_framebuffer(b->stfb,
1382 ST_ATTACHMENT_BACK_LEFT, ST_ATTACHMENT_FRONT_LEFT,
1383 x, b->height - y - height, width, height);
1384 }
1385
1386
1387
XMesaFlush(XMesaContext c)1388 void XMesaFlush( XMesaContext c )
1389 {
1390 if (c && c->xm_visual->display) {
1391 XMesaDisplay xmdpy = xmesa_init_display(c->xm_visual->display);
1392 struct pipe_fence_handle *fence = NULL;
1393
1394 c->st->flush(c->st, ST_FLUSH_FRONT, &fence);
1395 if (fence) {
1396 xmdpy->screen->fence_finish(xmdpy->screen, NULL, fence,
1397 PIPE_TIMEOUT_INFINITE);
1398 xmdpy->screen->fence_reference(xmdpy->screen, &fence, NULL);
1399 }
1400 XFlush( c->xm_visual->display );
1401 }
1402 }
1403
1404
1405
1406
1407
XMesaFindBuffer(Display * dpy,Drawable d)1408 XMesaBuffer XMesaFindBuffer( Display *dpy, Drawable d )
1409 {
1410 XMesaBuffer b;
1411 for (b = XMesaBufferList; b; b = b->Next) {
1412 if (b->ws.drawable == d && b->xm_visual->display == dpy) {
1413 return b;
1414 }
1415 }
1416 return NULL;
1417 }
1418
1419
1420 /**
1421 * Free/destroy all XMesaBuffers associated with given display.
1422 */
xmesa_destroy_buffers_on_display(Display * dpy)1423 void xmesa_destroy_buffers_on_display(Display *dpy)
1424 {
1425 XMesaBuffer b, next;
1426 for (b = XMesaBufferList; b; b = next) {
1427 next = b->Next;
1428 if (b->xm_visual->display == dpy) {
1429 xmesa_free_buffer(b);
1430 /* delete head of list? */
1431 if (XMesaBufferList == b) {
1432 XMesaBufferList = next;
1433 }
1434 }
1435 }
1436 }
1437
1438
1439 /*
1440 * Look for XMesaBuffers whose X window has been destroyed.
1441 * Deallocate any such XMesaBuffers.
1442 */
XMesaGarbageCollect(void)1443 void XMesaGarbageCollect( void )
1444 {
1445 XMesaBuffer b, next;
1446 for (b=XMesaBufferList; b; b=next) {
1447 next = b->Next;
1448 if (b->xm_visual &&
1449 b->xm_visual->display &&
1450 b->ws.drawable &&
1451 b->type == WINDOW) {
1452 XSync(b->xm_visual->display, False);
1453 if (!window_exists( b->xm_visual->display, b->ws.drawable )) {
1454 /* found a dead window, free the ancillary info */
1455 XMesaDestroyBuffer( b );
1456 }
1457 }
1458 }
1459 }
1460
1461
xmesa_attachment_type(int glx_attachment)1462 static enum st_attachment_type xmesa_attachment_type(int glx_attachment)
1463 {
1464 switch(glx_attachment) {
1465 case GLX_FRONT_LEFT_EXT:
1466 return ST_ATTACHMENT_FRONT_LEFT;
1467 case GLX_FRONT_RIGHT_EXT:
1468 return ST_ATTACHMENT_FRONT_RIGHT;
1469 case GLX_BACK_LEFT_EXT:
1470 return ST_ATTACHMENT_BACK_LEFT;
1471 case GLX_BACK_RIGHT_EXT:
1472 return ST_ATTACHMENT_BACK_RIGHT;
1473 default:
1474 assert(0);
1475 return ST_ATTACHMENT_FRONT_LEFT;
1476 }
1477 }
1478
1479
1480 PUBLIC void
XMesaBindTexImage(Display * dpy,XMesaBuffer drawable,int buffer,const int * attrib_list)1481 XMesaBindTexImage(Display *dpy, XMesaBuffer drawable, int buffer,
1482 const int *attrib_list)
1483 {
1484 struct st_context_iface *st = stapi->get_current(stapi);
1485 struct st_framebuffer_iface* stfbi = drawable->stfb;
1486 struct pipe_resource *res;
1487 int x, y, w, h;
1488 enum st_attachment_type st_attachment = xmesa_attachment_type(buffer);
1489
1490 x = 0;
1491 y = 0;
1492 w = drawable->width;
1493 h = drawable->height;
1494
1495 /* We need to validate our attachments before using them,
1496 * in case the texture doesn't exist yet. */
1497 xmesa_st_framebuffer_validate_textures(stfbi, w, h, 1 << st_attachment);
1498 res = xmesa_get_attachment(stfbi, st_attachment);
1499
1500 if (res) {
1501 struct pipe_context* pipe = xmesa_get_context(stfbi);
1502 enum pipe_format internal_format = res->format;
1503 struct pipe_transfer *tex_xfer;
1504 char *map;
1505 int line, byte_width;
1506 XImage *img;
1507
1508 internal_format = choose_pixel_format(drawable->xm_visual);
1509
1510 map = pipe_transfer_map(pipe, res,
1511 0, 0, /* level, layer */
1512 PIPE_TRANSFER_WRITE,
1513 x, y,
1514 w, h, &tex_xfer);
1515 if (!map)
1516 return;
1517
1518 /* Grab the XImage that we want to turn into a texture. */
1519 img = XGetImage(dpy,
1520 drawable->ws.drawable,
1521 x, y,
1522 w, h,
1523 AllPlanes,
1524 ZPixmap);
1525
1526 if (!img) {
1527 pipe_transfer_unmap(pipe, tex_xfer);
1528 return;
1529 }
1530
1531 /* The pipe transfer has a pitch rounded up to the nearest 64 pixels. */
1532 byte_width = w * ((img->bits_per_pixel + 7) / 8);
1533
1534 for (line = 0; line < h; line++)
1535 memcpy(&map[line * tex_xfer->stride],
1536 &img->data[line * img->bytes_per_line],
1537 byte_width);
1538
1539 pipe_transfer_unmap(pipe, tex_xfer);
1540
1541 st->teximage(st,
1542 ST_TEXTURE_2D,
1543 0, /* level */
1544 internal_format,
1545 res,
1546 FALSE /* no mipmap */);
1547
1548 }
1549 }
1550
1551
1552
1553 PUBLIC void
XMesaReleaseTexImage(Display * dpy,XMesaBuffer drawable,int buffer)1554 XMesaReleaseTexImage(Display *dpy, XMesaBuffer drawable, int buffer)
1555 {
1556 }
1557
1558
1559 void
XMesaCopyContext(XMesaContext src,XMesaContext dst,unsigned long mask)1560 XMesaCopyContext(XMesaContext src, XMesaContext dst, unsigned long mask)
1561 {
1562 if (dst->st->copy)
1563 dst->st->copy(dst->st, src->st, mask);
1564 }
1565