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loader: fix the no-modifiers case
[mesa.git] / src / loader / loader_dri3_helper.c
1 /*
2 * Copyright © 2013 Keith Packard
3 * Copyright © 2015 Boyan Ding
4 *
5 * Permission to use, copy, modify, distribute, and sell this software and its
6 * documentation for any purpose is hereby granted without fee, provided that
7 * the above copyright notice appear in all copies and that both that copyright
8 * notice and this permission notice appear in supporting documentation, and
9 * that the name of the copyright holders not be used in advertising or
10 * publicity pertaining to distribution of the software without specific,
11 * written prior permission. The copyright holders make no representations
12 * about the suitability of this software for any purpose. It is provided "as
13 * is" without express or implied warranty.
14 *
15 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
16 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
17 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
18 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
19 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
20 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
21 * OF THIS SOFTWARE.
22 */
23
24 #include <fcntl.h>
25 #include <stdlib.h>
26 #include <unistd.h>
27 #include <string.h>
28
29 #include <X11/xshmfence.h>
30 #include <xcb/xcb.h>
31 #include <xcb/dri3.h>
32 #include <xcb/present.h>
33
34 #include <X11/Xlib-xcb.h>
35
36 #include "loader_dri3_helper.h"
37 #include "util/macros.h"
38 #include "drm_fourcc.h"
39
40 /* From xmlpool/options.h, user exposed so should be stable */
41 #define DRI_CONF_VBLANK_NEVER 0
42 #define DRI_CONF_VBLANK_DEF_INTERVAL_0 1
43 #define DRI_CONF_VBLANK_DEF_INTERVAL_1 2
44 #define DRI_CONF_VBLANK_ALWAYS_SYNC 3
45
46 /**
47 * A cached blit context.
48 */
49 struct loader_dri3_blit_context {
50 mtx_t mtx;
51 __DRIcontext *ctx;
52 __DRIscreen *cur_screen;
53 const __DRIcoreExtension *core;
54 };
55
56 /* For simplicity we maintain the cache only for a single screen at a time */
57 static struct loader_dri3_blit_context blit_context = {
58 _MTX_INITIALIZER_NP, NULL
59 };
60
61 static void
62 dri3_flush_present_events(struct loader_dri3_drawable *draw);
63
64 static struct loader_dri3_buffer *
65 dri3_find_back_alloc(struct loader_dri3_drawable *draw);
66
67 static xcb_screen_t *
68 get_screen_for_root(xcb_connection_t *conn, xcb_window_t root)
69 {
70 xcb_screen_iterator_t screen_iter =
71 xcb_setup_roots_iterator(xcb_get_setup(conn));
72
73 for (; screen_iter.rem; xcb_screen_next (&screen_iter)) {
74 if (screen_iter.data->root == root)
75 return screen_iter.data;
76 }
77
78 return NULL;
79 }
80
81 static xcb_visualtype_t *
82 get_xcb_visualtype_for_depth(struct loader_dri3_drawable *draw, int depth)
83 {
84 xcb_visualtype_iterator_t visual_iter;
85 xcb_screen_t *screen = draw->screen;
86 xcb_depth_iterator_t depth_iter;
87
88 if (!screen)
89 return NULL;
90
91 depth_iter = xcb_screen_allowed_depths_iterator(screen);
92 for (; depth_iter.rem; xcb_depth_next(&depth_iter)) {
93 if (depth_iter.data->depth != depth)
94 continue;
95
96 visual_iter = xcb_depth_visuals_iterator(depth_iter.data);
97 if (visual_iter.rem)
98 return visual_iter.data;
99 }
100
101 return NULL;
102 }
103
104 /* Sets the adaptive sync window property state. */
105 static void
106 set_adaptive_sync_property(xcb_connection_t *conn, xcb_drawable_t drawable,
107 uint32_t state)
108 {
109 static char const name[] = "_VARIABLE_REFRESH";
110 xcb_intern_atom_cookie_t cookie;
111 xcb_intern_atom_reply_t* reply;
112 xcb_void_cookie_t check;
113
114 cookie = xcb_intern_atom(conn, 0, sizeof(name), name);
115 reply = xcb_intern_atom_reply(conn, cookie, NULL);
116 if (reply == NULL)
117 return;
118
119 if (state)
120 check = xcb_change_property_checked(conn, XCB_PROP_MODE_REPLACE,
121 drawable, reply->atom,
122 XCB_ATOM_CARDINAL, 32, 1, &state);
123 else
124 check = xcb_delete_property_checked(conn, drawable, reply->atom);
125
126 xcb_discard_reply(conn, check.sequence);
127 free(reply);
128 }
129
130 /* Get red channel mask for given drawable at given depth. */
131 static unsigned int
132 dri3_get_red_mask_for_depth(struct loader_dri3_drawable *draw, int depth)
133 {
134 xcb_visualtype_t *visual = get_xcb_visualtype_for_depth(draw, depth);
135
136 if (visual)
137 return visual->red_mask;
138
139 return 0;
140 }
141
142 /**
143 * Do we have blit functionality in the image blit extension?
144 *
145 * \param draw[in] The drawable intended to blit from / to.
146 * \return true if we have blit functionality. false otherwise.
147 */
148 static bool loader_dri3_have_image_blit(const struct loader_dri3_drawable *draw)
149 {
150 return draw->ext->image->base.version >= 9 &&
151 draw->ext->image->blitImage != NULL;
152 }
153
154 /**
155 * Get and lock (for use with the current thread) a dri context associated
156 * with the drawable's dri screen. The context is intended to be used with
157 * the dri image extension's blitImage method.
158 *
159 * \param draw[in] Pointer to the drawable whose dri screen we want a
160 * dri context for.
161 * \return A dri context or NULL if context creation failed.
162 *
163 * When the caller is done with the context (even if the context returned was
164 * NULL), the caller must call loader_dri3_blit_context_put.
165 */
166 static __DRIcontext *
167 loader_dri3_blit_context_get(struct loader_dri3_drawable *draw)
168 {
169 mtx_lock(&blit_context.mtx);
170
171 if (blit_context.ctx && blit_context.cur_screen != draw->dri_screen) {
172 blit_context.core->destroyContext(blit_context.ctx);
173 blit_context.ctx = NULL;
174 }
175
176 if (!blit_context.ctx) {
177 blit_context.ctx = draw->ext->core->createNewContext(draw->dri_screen,
178 NULL, NULL, NULL);
179 blit_context.cur_screen = draw->dri_screen;
180 blit_context.core = draw->ext->core;
181 }
182
183 return blit_context.ctx;
184 }
185
186 /**
187 * Release (for use with other threads) a dri context previously obtained using
188 * loader_dri3_blit_context_get.
189 */
190 static void
191 loader_dri3_blit_context_put(void)
192 {
193 mtx_unlock(&blit_context.mtx);
194 }
195
196 /**
197 * Blit (parts of) the contents of a DRI image to another dri image
198 *
199 * \param draw[in] The drawable which owns the images.
200 * \param dst[in] The destination image.
201 * \param src[in] The source image.
202 * \param dstx0[in] Start destination coordinate.
203 * \param dsty0[in] Start destination coordinate.
204 * \param width[in] Blit width.
205 * \param height[in] Blit height.
206 * \param srcx0[in] Start source coordinate.
207 * \param srcy0[in] Start source coordinate.
208 * \param flush_flag[in] Image blit flush flag.
209 * \return true iff successful.
210 */
211 static bool
212 loader_dri3_blit_image(struct loader_dri3_drawable *draw,
213 __DRIimage *dst, __DRIimage *src,
214 int dstx0, int dsty0, int width, int height,
215 int srcx0, int srcy0, int flush_flag)
216 {
217 __DRIcontext *dri_context;
218 bool use_blit_context = false;
219
220 if (!loader_dri3_have_image_blit(draw))
221 return false;
222
223 dri_context = draw->vtable->get_dri_context(draw);
224
225 if (!dri_context || !draw->vtable->in_current_context(draw)) {
226 dri_context = loader_dri3_blit_context_get(draw);
227 use_blit_context = true;
228 flush_flag |= __BLIT_FLAG_FLUSH;
229 }
230
231 if (dri_context)
232 draw->ext->image->blitImage(dri_context, dst, src, dstx0, dsty0,
233 width, height, srcx0, srcy0,
234 width, height, flush_flag);
235
236 if (use_blit_context)
237 loader_dri3_blit_context_put();
238
239 return dri_context != NULL;
240 }
241
242 static inline void
243 dri3_fence_reset(xcb_connection_t *c, struct loader_dri3_buffer *buffer)
244 {
245 xshmfence_reset(buffer->shm_fence);
246 }
247
248 static inline void
249 dri3_fence_set(struct loader_dri3_buffer *buffer)
250 {
251 xshmfence_trigger(buffer->shm_fence);
252 }
253
254 static inline void
255 dri3_fence_trigger(xcb_connection_t *c, struct loader_dri3_buffer *buffer)
256 {
257 xcb_sync_trigger_fence(c, buffer->sync_fence);
258 }
259
260 static inline void
261 dri3_fence_await(xcb_connection_t *c, struct loader_dri3_drawable *draw,
262 struct loader_dri3_buffer *buffer)
263 {
264 xcb_flush(c);
265 xshmfence_await(buffer->shm_fence);
266 if (draw) {
267 mtx_lock(&draw->mtx);
268 dri3_flush_present_events(draw);
269 mtx_unlock(&draw->mtx);
270 }
271 }
272
273 static void
274 dri3_update_num_back(struct loader_dri3_drawable *draw)
275 {
276 if (draw->last_present_mode == XCB_PRESENT_COMPLETE_MODE_FLIP)
277 draw->num_back = 3;
278 else
279 draw->num_back = 2;
280 }
281
282 void
283 loader_dri3_set_swap_interval(struct loader_dri3_drawable *draw, int interval)
284 {
285 draw->swap_interval = interval;
286 }
287
288 /** dri3_free_render_buffer
289 *
290 * Free everything associated with one render buffer including pixmap, fence
291 * stuff and the driver image
292 */
293 static void
294 dri3_free_render_buffer(struct loader_dri3_drawable *draw,
295 struct loader_dri3_buffer *buffer)
296 {
297 if (buffer->own_pixmap)
298 xcb_free_pixmap(draw->conn, buffer->pixmap);
299 xcb_sync_destroy_fence(draw->conn, buffer->sync_fence);
300 xshmfence_unmap_shm(buffer->shm_fence);
301 draw->ext->image->destroyImage(buffer->image);
302 if (buffer->linear_buffer)
303 draw->ext->image->destroyImage(buffer->linear_buffer);
304 free(buffer);
305 }
306
307 void
308 loader_dri3_drawable_fini(struct loader_dri3_drawable *draw)
309 {
310 int i;
311
312 draw->ext->core->destroyDrawable(draw->dri_drawable);
313
314 for (i = 0; i < ARRAY_SIZE(draw->buffers); i++) {
315 if (draw->buffers[i])
316 dri3_free_render_buffer(draw, draw->buffers[i]);
317 }
318
319 if (draw->special_event) {
320 xcb_void_cookie_t cookie =
321 xcb_present_select_input_checked(draw->conn, draw->eid, draw->drawable,
322 XCB_PRESENT_EVENT_MASK_NO_EVENT);
323
324 xcb_discard_reply(draw->conn, cookie.sequence);
325 xcb_unregister_for_special_event(draw->conn, draw->special_event);
326 }
327
328 cnd_destroy(&draw->event_cnd);
329 mtx_destroy(&draw->mtx);
330 }
331
332 int
333 loader_dri3_drawable_init(xcb_connection_t *conn,
334 xcb_drawable_t drawable,
335 __DRIscreen *dri_screen,
336 bool is_different_gpu,
337 bool multiplanes_available,
338 const __DRIconfig *dri_config,
339 struct loader_dri3_extensions *ext,
340 const struct loader_dri3_vtable *vtable,
341 struct loader_dri3_drawable *draw)
342 {
343 xcb_get_geometry_cookie_t cookie;
344 xcb_get_geometry_reply_t *reply;
345 xcb_generic_error_t *error;
346 GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
347 int swap_interval;
348
349 draw->conn = conn;
350 draw->ext = ext;
351 draw->vtable = vtable;
352 draw->drawable = drawable;
353 draw->dri_screen = dri_screen;
354 draw->is_different_gpu = is_different_gpu;
355 draw->multiplanes_available = multiplanes_available;
356
357 draw->have_back = 0;
358 draw->have_fake_front = 0;
359 draw->first_init = true;
360 draw->adaptive_sync = false;
361 draw->adaptive_sync_active = false;
362
363 draw->cur_blit_source = -1;
364 draw->back_format = __DRI_IMAGE_FORMAT_NONE;
365 mtx_init(&draw->mtx, mtx_plain);
366 cnd_init(&draw->event_cnd);
367
368 if (draw->ext->config) {
369 unsigned char adaptive_sync = 0;
370
371 draw->ext->config->configQueryi(draw->dri_screen,
372 "vblank_mode", &vblank_mode);
373
374 draw->ext->config->configQueryb(draw->dri_screen,
375 "adaptive_sync",
376 &adaptive_sync);
377
378 draw->adaptive_sync = adaptive_sync;
379 }
380
381 if (!draw->adaptive_sync)
382 set_adaptive_sync_property(conn, draw->drawable, false);
383
384 switch (vblank_mode) {
385 case DRI_CONF_VBLANK_NEVER:
386 case DRI_CONF_VBLANK_DEF_INTERVAL_0:
387 swap_interval = 0;
388 break;
389 case DRI_CONF_VBLANK_DEF_INTERVAL_1:
390 case DRI_CONF_VBLANK_ALWAYS_SYNC:
391 default:
392 swap_interval = 1;
393 break;
394 }
395 draw->swap_interval = swap_interval;
396
397 dri3_update_num_back(draw);
398
399 /* Create a new drawable */
400 draw->dri_drawable =
401 draw->ext->image_driver->createNewDrawable(dri_screen,
402 dri_config,
403 draw);
404
405 if (!draw->dri_drawable)
406 return 1;
407
408 cookie = xcb_get_geometry(draw->conn, draw->drawable);
409 reply = xcb_get_geometry_reply(draw->conn, cookie, &error);
410 if (reply == NULL || error != NULL) {
411 draw->ext->core->destroyDrawable(draw->dri_drawable);
412 return 1;
413 }
414
415 draw->screen = get_screen_for_root(draw->conn, reply->root);
416 draw->width = reply->width;
417 draw->height = reply->height;
418 draw->depth = reply->depth;
419 draw->vtable->set_drawable_size(draw, draw->width, draw->height);
420 free(reply);
421
422 draw->swap_method = __DRI_ATTRIB_SWAP_UNDEFINED;
423 if (draw->ext->core->base.version >= 2) {
424 (void )draw->ext->core->getConfigAttrib(dri_config,
425 __DRI_ATTRIB_SWAP_METHOD,
426 &draw->swap_method);
427 }
428
429 /*
430 * Make sure server has the same swap interval we do for the new
431 * drawable.
432 */
433 loader_dri3_set_swap_interval(draw, swap_interval);
434
435 return 0;
436 }
437
438 /*
439 * Process one Present event
440 */
441 static void
442 dri3_handle_present_event(struct loader_dri3_drawable *draw,
443 xcb_present_generic_event_t *ge)
444 {
445 switch (ge->evtype) {
446 case XCB_PRESENT_CONFIGURE_NOTIFY: {
447 xcb_present_configure_notify_event_t *ce = (void *) ge;
448
449 draw->width = ce->width;
450 draw->height = ce->height;
451 draw->vtable->set_drawable_size(draw, draw->width, draw->height);
452 draw->ext->flush->invalidate(draw->dri_drawable);
453 break;
454 }
455 case XCB_PRESENT_COMPLETE_NOTIFY: {
456 xcb_present_complete_notify_event_t *ce = (void *) ge;
457
458 /* Compute the processed SBC number from the received 32-bit serial number
459 * merged with the upper 32-bits of the sent 64-bit serial number while
460 * checking for wrap.
461 */
462 if (ce->kind == XCB_PRESENT_COMPLETE_KIND_PIXMAP) {
463 uint64_t recv_sbc = (draw->send_sbc & 0xffffffff00000000LL) | ce->serial;
464
465 /* Only assume wraparound if that results in exactly the previous
466 * SBC + 1, otherwise ignore received SBC > sent SBC (those are
467 * probably from a previous loader_dri3_drawable instance) to avoid
468 * calculating bogus target MSC values in loader_dri3_swap_buffers_msc
469 */
470 if (recv_sbc <= draw->send_sbc)
471 draw->recv_sbc = recv_sbc;
472 else if (recv_sbc == (draw->recv_sbc + 0x100000001ULL))
473 draw->recv_sbc = recv_sbc - 0x100000000ULL;
474
475 /* When moving from flip to copy, we assume that we can allocate in
476 * a more optimal way if we don't need to cater for the display
477 * controller.
478 */
479 if (ce->mode == XCB_PRESENT_COMPLETE_MODE_COPY &&
480 draw->last_present_mode == XCB_PRESENT_COMPLETE_MODE_FLIP) {
481 for (int b = 0; b < ARRAY_SIZE(draw->buffers); b++) {
482 if (draw->buffers[b])
483 draw->buffers[b]->reallocate = true;
484 }
485 }
486
487 /* If the server tells us that our allocation is suboptimal, we
488 * reallocate once.
489 */
490 #ifdef HAVE_DRI3_MODIFIERS
491 if (ce->mode == XCB_PRESENT_COMPLETE_MODE_SUBOPTIMAL_COPY &&
492 draw->last_present_mode != ce->mode) {
493 for (int b = 0; b < ARRAY_SIZE(draw->buffers); b++) {
494 if (draw->buffers[b])
495 draw->buffers[b]->reallocate = true;
496 }
497 }
498 #endif
499 draw->last_present_mode = ce->mode;
500
501 if (draw->vtable->show_fps)
502 draw->vtable->show_fps(draw, ce->ust);
503
504 draw->ust = ce->ust;
505 draw->msc = ce->msc;
506 } else if (ce->serial == draw->eid) {
507 draw->notify_ust = ce->ust;
508 draw->notify_msc = ce->msc;
509 }
510 break;
511 }
512 case XCB_PRESENT_EVENT_IDLE_NOTIFY: {
513 xcb_present_idle_notify_event_t *ie = (void *) ge;
514 int b;
515
516 for (b = 0; b < ARRAY_SIZE(draw->buffers); b++) {
517 struct loader_dri3_buffer *buf = draw->buffers[b];
518
519 if (buf && buf->pixmap == ie->pixmap)
520 buf->busy = 0;
521 }
522 break;
523 }
524 }
525 free(ge);
526 }
527
528 static bool
529 dri3_wait_for_event_locked(struct loader_dri3_drawable *draw)
530 {
531 xcb_generic_event_t *ev;
532 xcb_present_generic_event_t *ge;
533
534 xcb_flush(draw->conn);
535
536 /* Only have one thread waiting for events at a time */
537 if (draw->has_event_waiter) {
538 cnd_wait(&draw->event_cnd, &draw->mtx);
539 /* Another thread has updated the protected info, so retest. */
540 return true;
541 } else {
542 draw->has_event_waiter = true;
543 /* Allow other threads access to the drawable while we're waiting. */
544 mtx_unlock(&draw->mtx);
545 ev = xcb_wait_for_special_event(draw->conn, draw->special_event);
546 mtx_lock(&draw->mtx);
547 draw->has_event_waiter = false;
548 cnd_broadcast(&draw->event_cnd);
549 }
550 if (!ev)
551 return false;
552 ge = (void *) ev;
553 dri3_handle_present_event(draw, ge);
554 return true;
555 }
556
557 /** loader_dri3_wait_for_msc
558 *
559 * Get the X server to send an event when the target msc/divisor/remainder is
560 * reached.
561 */
562 bool
563 loader_dri3_wait_for_msc(struct loader_dri3_drawable *draw,
564 int64_t target_msc,
565 int64_t divisor, int64_t remainder,
566 int64_t *ust, int64_t *msc, int64_t *sbc)
567 {
568 xcb_void_cookie_t cookie = xcb_present_notify_msc(draw->conn,
569 draw->drawable,
570 draw->eid,
571 target_msc,
572 divisor,
573 remainder);
574 xcb_generic_event_t *ev;
575 unsigned full_sequence;
576
577 mtx_lock(&draw->mtx);
578 xcb_flush(draw->conn);
579
580 /* Wait for the event */
581 do {
582 ev = xcb_wait_for_special_event(draw->conn, draw->special_event);
583 if (!ev) {
584 mtx_unlock(&draw->mtx);
585 return false;
586 }
587
588 full_sequence = ev->full_sequence;
589 dri3_handle_present_event(draw, (void *) ev);
590 } while (full_sequence != cookie.sequence || draw->notify_msc < target_msc);
591
592 *ust = draw->notify_ust;
593 *msc = draw->notify_msc;
594 *sbc = draw->recv_sbc;
595 mtx_unlock(&draw->mtx);
596
597 return true;
598 }
599
600 /** loader_dri3_wait_for_sbc
601 *
602 * Wait for the completed swap buffer count to reach the specified
603 * target. Presumably the application knows that this will be reached with
604 * outstanding complete events, or we're going to be here awhile.
605 */
606 int
607 loader_dri3_wait_for_sbc(struct loader_dri3_drawable *draw,
608 int64_t target_sbc, int64_t *ust,
609 int64_t *msc, int64_t *sbc)
610 {
611 /* From the GLX_OML_sync_control spec:
612 *
613 * "If <target_sbc> = 0, the function will block until all previous
614 * swaps requested with glXSwapBuffersMscOML for that window have
615 * completed."
616 */
617 mtx_lock(&draw->mtx);
618 if (!target_sbc)
619 target_sbc = draw->send_sbc;
620
621 while (draw->recv_sbc < target_sbc) {
622 if (!dri3_wait_for_event_locked(draw)) {
623 mtx_unlock(&draw->mtx);
624 return 0;
625 }
626 }
627
628 *ust = draw->ust;
629 *msc = draw->msc;
630 *sbc = draw->recv_sbc;
631 mtx_unlock(&draw->mtx);
632 return 1;
633 }
634
635 /** loader_dri3_find_back
636 *
637 * Find an idle back buffer. If there isn't one, then
638 * wait for a present idle notify event from the X server
639 */
640 static int
641 dri3_find_back(struct loader_dri3_drawable *draw)
642 {
643 int b;
644 int num_to_consider;
645
646 mtx_lock(&draw->mtx);
647 /* Increase the likelyhood of reusing current buffer */
648 dri3_flush_present_events(draw);
649
650 /* Check whether we need to reuse the current back buffer as new back.
651 * In that case, wait until it's not busy anymore.
652 */
653 num_to_consider = draw->num_back;
654 if (!loader_dri3_have_image_blit(draw) && draw->cur_blit_source != -1) {
655 num_to_consider = 1;
656 draw->cur_blit_source = -1;
657 }
658
659 for (;;) {
660 for (b = 0; b < num_to_consider; b++) {
661 int id = LOADER_DRI3_BACK_ID((b + draw->cur_back) % draw->num_back);
662 struct loader_dri3_buffer *buffer = draw->buffers[id];
663
664 if (!buffer || !buffer->busy) {
665 draw->cur_back = id;
666 mtx_unlock(&draw->mtx);
667 return id;
668 }
669 }
670 if (!dri3_wait_for_event_locked(draw)) {
671 mtx_unlock(&draw->mtx);
672 return -1;
673 }
674 }
675 }
676
677 static xcb_gcontext_t
678 dri3_drawable_gc(struct loader_dri3_drawable *draw)
679 {
680 if (!draw->gc) {
681 uint32_t v = 0;
682 xcb_create_gc(draw->conn,
683 (draw->gc = xcb_generate_id(draw->conn)),
684 draw->drawable,
685 XCB_GC_GRAPHICS_EXPOSURES,
686 &v);
687 }
688 return draw->gc;
689 }
690
691
692 static struct loader_dri3_buffer *
693 dri3_back_buffer(struct loader_dri3_drawable *draw)
694 {
695 return draw->buffers[LOADER_DRI3_BACK_ID(draw->cur_back)];
696 }
697
698 static struct loader_dri3_buffer *
699 dri3_fake_front_buffer(struct loader_dri3_drawable *draw)
700 {
701 return draw->buffers[LOADER_DRI3_FRONT_ID];
702 }
703
704 static void
705 dri3_copy_area(xcb_connection_t *c,
706 xcb_drawable_t src_drawable,
707 xcb_drawable_t dst_drawable,
708 xcb_gcontext_t gc,
709 int16_t src_x,
710 int16_t src_y,
711 int16_t dst_x,
712 int16_t dst_y,
713 uint16_t width,
714 uint16_t height)
715 {
716 xcb_void_cookie_t cookie;
717
718 cookie = xcb_copy_area_checked(c,
719 src_drawable,
720 dst_drawable,
721 gc,
722 src_x,
723 src_y,
724 dst_x,
725 dst_y,
726 width,
727 height);
728 xcb_discard_reply(c, cookie.sequence);
729 }
730
731 /**
732 * Asks the driver to flush any queued work necessary for serializing with the
733 * X command stream, and optionally the slightly more strict requirement of
734 * glFlush() equivalence (which would require flushing even if nothing had
735 * been drawn to a window system framebuffer, for example).
736 */
737 void
738 loader_dri3_flush(struct loader_dri3_drawable *draw,
739 unsigned flags,
740 enum __DRI2throttleReason throttle_reason)
741 {
742 /* NEED TO CHECK WHETHER CONTEXT IS NULL */
743 __DRIcontext *dri_context = draw->vtable->get_dri_context(draw);
744
745 if (dri_context) {
746 draw->ext->flush->flush_with_flags(dri_context, draw->dri_drawable,
747 flags, throttle_reason);
748 }
749 }
750
751 void
752 loader_dri3_copy_sub_buffer(struct loader_dri3_drawable *draw,
753 int x, int y,
754 int width, int height,
755 bool flush)
756 {
757 struct loader_dri3_buffer *back;
758 unsigned flags = __DRI2_FLUSH_DRAWABLE;
759
760 /* Check we have the right attachments */
761 if (!draw->have_back || draw->is_pixmap)
762 return;
763
764 if (flush)
765 flags |= __DRI2_FLUSH_CONTEXT;
766 loader_dri3_flush(draw, flags, __DRI2_THROTTLE_SWAPBUFFER);
767
768 back = dri3_find_back_alloc(draw);
769 if (!back)
770 return;
771
772 y = draw->height - y - height;
773
774 if (draw->is_different_gpu) {
775 /* Update the linear buffer part of the back buffer
776 * for the dri3_copy_area operation
777 */
778 (void) loader_dri3_blit_image(draw,
779 back->linear_buffer,
780 back->image,
781 0, 0, back->width, back->height,
782 0, 0, __BLIT_FLAG_FLUSH);
783 }
784
785 loader_dri3_swapbuffer_barrier(draw);
786 dri3_fence_reset(draw->conn, back);
787 dri3_copy_area(draw->conn,
788 back->pixmap,
789 draw->drawable,
790 dri3_drawable_gc(draw),
791 x, y, x, y, width, height);
792 dri3_fence_trigger(draw->conn, back);
793 /* Refresh the fake front (if present) after we just damaged the real
794 * front.
795 */
796 if (draw->have_fake_front &&
797 !loader_dri3_blit_image(draw,
798 dri3_fake_front_buffer(draw)->image,
799 back->image,
800 x, y, width, height,
801 x, y, __BLIT_FLAG_FLUSH) &&
802 !draw->is_different_gpu) {
803 dri3_fence_reset(draw->conn, dri3_fake_front_buffer(draw));
804 dri3_copy_area(draw->conn,
805 back->pixmap,
806 dri3_fake_front_buffer(draw)->pixmap,
807 dri3_drawable_gc(draw),
808 x, y, x, y, width, height);
809 dri3_fence_trigger(draw->conn, dri3_fake_front_buffer(draw));
810 dri3_fence_await(draw->conn, NULL, dri3_fake_front_buffer(draw));
811 }
812 dri3_fence_await(draw->conn, draw, back);
813 }
814
815 void
816 loader_dri3_copy_drawable(struct loader_dri3_drawable *draw,
817 xcb_drawable_t dest,
818 xcb_drawable_t src)
819 {
820 loader_dri3_flush(draw, __DRI2_FLUSH_DRAWABLE, 0);
821
822 dri3_fence_reset(draw->conn, dri3_fake_front_buffer(draw));
823 dri3_copy_area(draw->conn,
824 src, dest,
825 dri3_drawable_gc(draw),
826 0, 0, 0, 0, draw->width, draw->height);
827 dri3_fence_trigger(draw->conn, dri3_fake_front_buffer(draw));
828 dri3_fence_await(draw->conn, draw, dri3_fake_front_buffer(draw));
829 }
830
831 void
832 loader_dri3_wait_x(struct loader_dri3_drawable *draw)
833 {
834 struct loader_dri3_buffer *front;
835
836 if (draw == NULL || !draw->have_fake_front)
837 return;
838
839 front = dri3_fake_front_buffer(draw);
840
841 loader_dri3_copy_drawable(draw, front->pixmap, draw->drawable);
842
843 /* In the psc->is_different_gpu case, the linear buffer has been updated,
844 * but not yet the tiled buffer.
845 * Copy back to the tiled buffer we use for rendering.
846 * Note that we don't need flushing.
847 */
848 if (draw->is_different_gpu)
849 (void) loader_dri3_blit_image(draw,
850 front->image,
851 front->linear_buffer,
852 0, 0, front->width, front->height,
853 0, 0, 0);
854 }
855
856 void
857 loader_dri3_wait_gl(struct loader_dri3_drawable *draw)
858 {
859 struct loader_dri3_buffer *front;
860
861 if (draw == NULL || !draw->have_fake_front)
862 return;
863
864 front = dri3_fake_front_buffer(draw);
865
866 /* In the psc->is_different_gpu case, we update the linear_buffer
867 * before updating the real front.
868 */
869 if (draw->is_different_gpu)
870 (void) loader_dri3_blit_image(draw,
871 front->linear_buffer,
872 front->image,
873 0, 0, front->width, front->height,
874 0, 0, __BLIT_FLAG_FLUSH);
875 loader_dri3_swapbuffer_barrier(draw);
876 loader_dri3_copy_drawable(draw, draw->drawable, front->pixmap);
877 }
878
879 /** dri3_flush_present_events
880 *
881 * Process any present events that have been received from the X server
882 */
883 static void
884 dri3_flush_present_events(struct loader_dri3_drawable *draw)
885 {
886 /* Check to see if any configuration changes have occurred
887 * since we were last invoked
888 */
889 if (draw->has_event_waiter)
890 return;
891
892 if (draw->special_event) {
893 xcb_generic_event_t *ev;
894
895 while ((ev = xcb_poll_for_special_event(draw->conn,
896 draw->special_event)) != NULL) {
897 xcb_present_generic_event_t *ge = (void *) ev;
898 dri3_handle_present_event(draw, ge);
899 }
900 }
901 }
902
903 /** loader_dri3_swap_buffers_msc
904 *
905 * Make the current back buffer visible using the present extension
906 */
907 int64_t
908 loader_dri3_swap_buffers_msc(struct loader_dri3_drawable *draw,
909 int64_t target_msc, int64_t divisor,
910 int64_t remainder, unsigned flush_flags,
911 bool force_copy)
912 {
913 struct loader_dri3_buffer *back;
914 int64_t ret = 0;
915 uint32_t options = XCB_PRESENT_OPTION_NONE;
916
917 draw->vtable->flush_drawable(draw, flush_flags);
918
919 back = dri3_find_back_alloc(draw);
920
921 mtx_lock(&draw->mtx);
922
923 if (draw->adaptive_sync && !draw->adaptive_sync_active) {
924 set_adaptive_sync_property(draw->conn, draw->drawable, true);
925 draw->adaptive_sync_active = true;
926 }
927
928 if (draw->is_different_gpu && back) {
929 /* Update the linear buffer before presenting the pixmap */
930 (void) loader_dri3_blit_image(draw,
931 back->linear_buffer,
932 back->image,
933 0, 0, back->width, back->height,
934 0, 0, __BLIT_FLAG_FLUSH);
935 }
936
937 /* If we need to preload the new back buffer, remember the source.
938 * The force_copy parameter is used by EGL to attempt to preserve
939 * the back buffer across a call to this function.
940 */
941 if (draw->swap_method != __DRI_ATTRIB_SWAP_UNDEFINED || force_copy)
942 draw->cur_blit_source = LOADER_DRI3_BACK_ID(draw->cur_back);
943
944 /* Exchange the back and fake front. Even though the server knows about these
945 * buffers, it has no notion of back and fake front.
946 */
947 if (back && draw->have_fake_front) {
948 struct loader_dri3_buffer *tmp;
949
950 tmp = dri3_fake_front_buffer(draw);
951 draw->buffers[LOADER_DRI3_FRONT_ID] = back;
952 draw->buffers[LOADER_DRI3_BACK_ID(draw->cur_back)] = tmp;
953
954 if (draw->swap_method == __DRI_ATTRIB_SWAP_COPY || force_copy)
955 draw->cur_blit_source = LOADER_DRI3_FRONT_ID;
956 }
957
958 dri3_flush_present_events(draw);
959
960 if (back && !draw->is_pixmap) {
961 dri3_fence_reset(draw->conn, back);
962
963 /* Compute when we want the frame shown by taking the last known
964 * successful MSC and adding in a swap interval for each outstanding swap
965 * request. target_msc=divisor=remainder=0 means "Use glXSwapBuffers()
966 * semantic"
967 */
968 ++draw->send_sbc;
969 if (target_msc == 0 && divisor == 0 && remainder == 0)
970 target_msc = draw->msc + draw->swap_interval *
971 (draw->send_sbc - draw->recv_sbc);
972 else if (divisor == 0 && remainder > 0) {
973 /* From the GLX_OML_sync_control spec:
974 * "If <divisor> = 0, the swap will occur when MSC becomes
975 * greater than or equal to <target_msc>."
976 *
977 * Note that there's no mention of the remainder. The Present
978 * extension throws BadValue for remainder != 0 with divisor == 0, so
979 * just drop the passed in value.
980 */
981 remainder = 0;
982 }
983
984 /* From the GLX_EXT_swap_control spec
985 * and the EGL 1.4 spec (page 53):
986 *
987 * "If <interval> is set to a value of 0, buffer swaps are not
988 * synchronized to a video frame."
989 *
990 * Implementation note: It is possible to enable triple buffering
991 * behaviour by not using XCB_PRESENT_OPTION_ASYNC, but this should not be
992 * the default.
993 */
994 if (draw->swap_interval == 0)
995 options |= XCB_PRESENT_OPTION_ASYNC;
996
997 /* If we need to populate the new back, but need to reuse the back
998 * buffer slot due to lack of local blit capabilities, make sure
999 * the server doesn't flip and we deadlock.
1000 */
1001 if (!loader_dri3_have_image_blit(draw) && draw->cur_blit_source != -1)
1002 options |= XCB_PRESENT_OPTION_COPY;
1003 #ifdef HAVE_DRI3_MODIFIERS
1004 if (draw->multiplanes_available)
1005 options |= XCB_PRESENT_OPTION_SUBOPTIMAL;
1006 #endif
1007 back->busy = 1;
1008 back->last_swap = draw->send_sbc;
1009 xcb_present_pixmap(draw->conn,
1010 draw->drawable,
1011 back->pixmap,
1012 (uint32_t) draw->send_sbc,
1013 0, /* valid */
1014 0, /* update */
1015 0, /* x_off */
1016 0, /* y_off */
1017 None, /* target_crtc */
1018 None,
1019 back->sync_fence,
1020 options,
1021 target_msc,
1022 divisor,
1023 remainder, 0, NULL);
1024 ret = (int64_t) draw->send_sbc;
1025
1026 /* Schedule a server-side back-preserving blit if necessary.
1027 * This happens iff all conditions below are satisfied:
1028 * a) We have a fake front,
1029 * b) We need to preserve the back buffer,
1030 * c) We don't have local blit capabilities.
1031 */
1032 if (!loader_dri3_have_image_blit(draw) && draw->cur_blit_source != -1 &&
1033 draw->cur_blit_source != LOADER_DRI3_BACK_ID(draw->cur_back)) {
1034 struct loader_dri3_buffer *new_back = dri3_back_buffer(draw);
1035 struct loader_dri3_buffer *src = draw->buffers[draw->cur_blit_source];
1036
1037 dri3_fence_reset(draw->conn, new_back);
1038 dri3_copy_area(draw->conn, src->pixmap,
1039 new_back->pixmap,
1040 dri3_drawable_gc(draw),
1041 0, 0, 0, 0, draw->width, draw->height);
1042 dri3_fence_trigger(draw->conn, new_back);
1043 new_back->last_swap = src->last_swap;
1044 }
1045
1046 xcb_flush(draw->conn);
1047 if (draw->stamp)
1048 ++(*draw->stamp);
1049 }
1050 mtx_unlock(&draw->mtx);
1051
1052 draw->ext->flush->invalidate(draw->dri_drawable);
1053
1054 return ret;
1055 }
1056
1057 int
1058 loader_dri3_query_buffer_age(struct loader_dri3_drawable *draw)
1059 {
1060 struct loader_dri3_buffer *back = dri3_find_back_alloc(draw);
1061 int ret;
1062
1063 mtx_lock(&draw->mtx);
1064 ret = (!back || back->last_swap == 0) ? 0 :
1065 draw->send_sbc - back->last_swap + 1;
1066 mtx_unlock(&draw->mtx);
1067
1068 return ret;
1069 }
1070
1071 /** loader_dri3_open
1072 *
1073 * Wrapper around xcb_dri3_open
1074 */
1075 int
1076 loader_dri3_open(xcb_connection_t *conn,
1077 xcb_window_t root,
1078 uint32_t provider)
1079 {
1080 xcb_dri3_open_cookie_t cookie;
1081 xcb_dri3_open_reply_t *reply;
1082 int fd;
1083
1084 cookie = xcb_dri3_open(conn,
1085 root,
1086 provider);
1087
1088 reply = xcb_dri3_open_reply(conn, cookie, NULL);
1089 if (!reply)
1090 return -1;
1091
1092 if (reply->nfd != 1) {
1093 free(reply);
1094 return -1;
1095 }
1096
1097 fd = xcb_dri3_open_reply_fds(conn, reply)[0];
1098 free(reply);
1099 fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
1100
1101 return fd;
1102 }
1103
1104 static uint32_t
1105 dri3_cpp_for_format(uint32_t format) {
1106 switch (format) {
1107 case __DRI_IMAGE_FORMAT_R8:
1108 return 1;
1109 case __DRI_IMAGE_FORMAT_RGB565:
1110 case __DRI_IMAGE_FORMAT_GR88:
1111 return 2;
1112 case __DRI_IMAGE_FORMAT_XRGB8888:
1113 case __DRI_IMAGE_FORMAT_ARGB8888:
1114 case __DRI_IMAGE_FORMAT_ABGR8888:
1115 case __DRI_IMAGE_FORMAT_XBGR8888:
1116 case __DRI_IMAGE_FORMAT_XRGB2101010:
1117 case __DRI_IMAGE_FORMAT_ARGB2101010:
1118 case __DRI_IMAGE_FORMAT_XBGR2101010:
1119 case __DRI_IMAGE_FORMAT_ABGR2101010:
1120 case __DRI_IMAGE_FORMAT_SARGB8:
1121 case __DRI_IMAGE_FORMAT_SABGR8:
1122 return 4;
1123 case __DRI_IMAGE_FORMAT_NONE:
1124 default:
1125 return 0;
1126 }
1127 }
1128
1129 /* Map format of render buffer to corresponding format for the linear_buffer
1130 * used for sharing with the display gpu of a Prime setup (== is_different_gpu).
1131 * Usually linear_format == format, except for depth >= 30 formats, where
1132 * different gpu vendors have different preferences wrt. color channel ordering.
1133 */
1134 static uint32_t
1135 dri3_linear_format_for_format(struct loader_dri3_drawable *draw, uint32_t format)
1136 {
1137 switch (format) {
1138 case __DRI_IMAGE_FORMAT_XRGB2101010:
1139 case __DRI_IMAGE_FORMAT_XBGR2101010:
1140 /* Different preferred formats for different hw */
1141 if (dri3_get_red_mask_for_depth(draw, 30) == 0x3ff)
1142 return __DRI_IMAGE_FORMAT_XBGR2101010;
1143 else
1144 return __DRI_IMAGE_FORMAT_XRGB2101010;
1145
1146 case __DRI_IMAGE_FORMAT_ARGB2101010:
1147 case __DRI_IMAGE_FORMAT_ABGR2101010:
1148 /* Different preferred formats for different hw */
1149 if (dri3_get_red_mask_for_depth(draw, 30) == 0x3ff)
1150 return __DRI_IMAGE_FORMAT_ABGR2101010;
1151 else
1152 return __DRI_IMAGE_FORMAT_ARGB2101010;
1153
1154 default:
1155 return format;
1156 }
1157 }
1158
1159 /* the DRIimage createImage function takes __DRI_IMAGE_FORMAT codes, while
1160 * the createImageFromFds call takes __DRI_IMAGE_FOURCC codes. To avoid
1161 * complete confusion, just deal in __DRI_IMAGE_FORMAT codes for now and
1162 * translate to __DRI_IMAGE_FOURCC codes in the call to createImageFromFds
1163 */
1164 static int
1165 image_format_to_fourcc(int format)
1166 {
1167
1168 /* Convert from __DRI_IMAGE_FORMAT to __DRI_IMAGE_FOURCC (sigh) */
1169 switch (format) {
1170 case __DRI_IMAGE_FORMAT_SARGB8: return __DRI_IMAGE_FOURCC_SARGB8888;
1171 case __DRI_IMAGE_FORMAT_SABGR8: return __DRI_IMAGE_FOURCC_SABGR8888;
1172 case __DRI_IMAGE_FORMAT_RGB565: return __DRI_IMAGE_FOURCC_RGB565;
1173 case __DRI_IMAGE_FORMAT_XRGB8888: return __DRI_IMAGE_FOURCC_XRGB8888;
1174 case __DRI_IMAGE_FORMAT_ARGB8888: return __DRI_IMAGE_FOURCC_ARGB8888;
1175 case __DRI_IMAGE_FORMAT_ABGR8888: return __DRI_IMAGE_FOURCC_ABGR8888;
1176 case __DRI_IMAGE_FORMAT_XBGR8888: return __DRI_IMAGE_FOURCC_XBGR8888;
1177 case __DRI_IMAGE_FORMAT_XRGB2101010: return __DRI_IMAGE_FOURCC_XRGB2101010;
1178 case __DRI_IMAGE_FORMAT_ARGB2101010: return __DRI_IMAGE_FOURCC_ARGB2101010;
1179 case __DRI_IMAGE_FORMAT_XBGR2101010: return __DRI_IMAGE_FOURCC_XBGR2101010;
1180 case __DRI_IMAGE_FORMAT_ABGR2101010: return __DRI_IMAGE_FOURCC_ABGR2101010;
1181 }
1182 return 0;
1183 }
1184
1185 #ifdef HAVE_DRI3_MODIFIERS
1186 static bool
1187 has_supported_modifier(struct loader_dri3_drawable *draw, unsigned int format,
1188 uint64_t *modifiers, uint32_t count)
1189 {
1190 uint64_t *supported_modifiers;
1191 int32_t supported_modifiers_count;
1192 bool found = false;
1193 int i, j;
1194
1195 if (!draw->ext->image->queryDmaBufModifiers(draw->dri_screen,
1196 format, 0, NULL, NULL,
1197 &supported_modifiers_count) ||
1198 supported_modifiers_count == 0)
1199 return false;
1200
1201 supported_modifiers = malloc(supported_modifiers_count * sizeof(uint64_t));
1202 if (!supported_modifiers)
1203 return false;
1204
1205 draw->ext->image->queryDmaBufModifiers(draw->dri_screen, format,
1206 supported_modifiers_count,
1207 supported_modifiers, NULL,
1208 &supported_modifiers_count);
1209
1210 for (i = 0; !found && i < supported_modifiers_count; i++) {
1211 for (j = 0; !found && j < count; j++) {
1212 if (supported_modifiers[i] == modifiers[j])
1213 found = true;
1214 }
1215 }
1216
1217 free(supported_modifiers);
1218 return found;
1219 }
1220 #endif
1221
1222 /** loader_dri3_alloc_render_buffer
1223 *
1224 * Use the driver createImage function to construct a __DRIimage, then
1225 * get a file descriptor for that and create an X pixmap from that
1226 *
1227 * Allocate an xshmfence for synchronization
1228 */
1229 static struct loader_dri3_buffer *
1230 dri3_alloc_render_buffer(struct loader_dri3_drawable *draw, unsigned int format,
1231 int width, int height, int depth)
1232 {
1233 struct loader_dri3_buffer *buffer;
1234 __DRIimage *pixmap_buffer;
1235 xcb_pixmap_t pixmap;
1236 xcb_sync_fence_t sync_fence;
1237 struct xshmfence *shm_fence;
1238 int buffer_fds[4], fence_fd;
1239 int num_planes = 0;
1240 int i, mod;
1241 int ret;
1242
1243 /* Create an xshmfence object and
1244 * prepare to send that to the X server
1245 */
1246
1247 fence_fd = xshmfence_alloc_shm();
1248 if (fence_fd < 0)
1249 return NULL;
1250
1251 shm_fence = xshmfence_map_shm(fence_fd);
1252 if (shm_fence == NULL)
1253 goto no_shm_fence;
1254
1255 /* Allocate the image from the driver
1256 */
1257 buffer = calloc(1, sizeof *buffer);
1258 if (!buffer)
1259 goto no_buffer;
1260
1261 buffer->cpp = dri3_cpp_for_format(format);
1262 if (!buffer->cpp)
1263 goto no_image;
1264
1265 if (!draw->is_different_gpu) {
1266 #ifdef HAVE_DRI3_MODIFIERS
1267 if (draw->multiplanes_available &&
1268 draw->ext->image->base.version >= 15 &&
1269 draw->ext->image->queryDmaBufModifiers &&
1270 draw->ext->image->createImageWithModifiers) {
1271 xcb_dri3_get_supported_modifiers_cookie_t mod_cookie;
1272 xcb_dri3_get_supported_modifiers_reply_t *mod_reply;
1273 xcb_generic_error_t *error = NULL;
1274 uint64_t *modifiers = NULL;
1275 uint32_t count = 0;
1276
1277 mod_cookie = xcb_dri3_get_supported_modifiers(draw->conn,
1278 draw->window,
1279 depth, buffer->cpp * 8);
1280 mod_reply = xcb_dri3_get_supported_modifiers_reply(draw->conn,
1281 mod_cookie,
1282 &error);
1283 if (!mod_reply)
1284 goto no_image;
1285
1286 if (mod_reply->num_window_modifiers) {
1287 count = mod_reply->num_window_modifiers;
1288 modifiers = malloc(count * sizeof(uint64_t));
1289 if (!modifiers) {
1290 free(mod_reply);
1291 goto no_image;
1292 }
1293
1294 memcpy(modifiers,
1295 xcb_dri3_get_supported_modifiers_window_modifiers(mod_reply),
1296 count * sizeof(uint64_t));
1297
1298 if (!has_supported_modifier(draw, image_format_to_fourcc(format),
1299 modifiers, count)) {
1300 free(modifiers);
1301 count = 0;
1302 modifiers = NULL;
1303 }
1304 }
1305
1306 if (mod_reply->num_screen_modifiers && modifiers == NULL) {
1307 count = mod_reply->num_screen_modifiers;
1308 modifiers = malloc(count * sizeof(uint64_t));
1309 if (!modifiers) {
1310 free(modifiers);
1311 free(mod_reply);
1312 goto no_image;
1313 }
1314
1315 memcpy(modifiers,
1316 xcb_dri3_get_supported_modifiers_screen_modifiers(mod_reply),
1317 count * sizeof(uint64_t));
1318 }
1319
1320 free(mod_reply);
1321
1322 /* don't use createImageWithModifiers() if we have no
1323 * modifiers, other things depend on the use flags when
1324 * there are no modifiers to know that a buffer can be
1325 * shared.
1326 */
1327 if (modifiers) {
1328 buffer->image = draw->ext->image->createImageWithModifiers(draw->dri_screen,
1329 width, height,
1330 format,
1331 modifiers,
1332 count,
1333 buffer);
1334 }
1335
1336 free(modifiers);
1337 }
1338 #endif
1339 if (!buffer->image)
1340 buffer->image = draw->ext->image->createImage(draw->dri_screen,
1341 width, height,
1342 format,
1343 __DRI_IMAGE_USE_SHARE |
1344 __DRI_IMAGE_USE_SCANOUT |
1345 __DRI_IMAGE_USE_BACKBUFFER,
1346 buffer);
1347
1348 pixmap_buffer = buffer->image;
1349
1350 if (!buffer->image)
1351 goto no_image;
1352 } else {
1353 buffer->image = draw->ext->image->createImage(draw->dri_screen,
1354 width, height,
1355 format,
1356 0,
1357 buffer);
1358
1359 if (!buffer->image)
1360 goto no_image;
1361
1362 buffer->linear_buffer =
1363 draw->ext->image->createImage(draw->dri_screen,
1364 width, height,
1365 dri3_linear_format_for_format(draw, format),
1366 __DRI_IMAGE_USE_SHARE |
1367 __DRI_IMAGE_USE_LINEAR |
1368 __DRI_IMAGE_USE_BACKBUFFER,
1369 buffer);
1370 pixmap_buffer = buffer->linear_buffer;
1371
1372 if (!buffer->linear_buffer)
1373 goto no_linear_buffer;
1374 }
1375
1376 /* X want some information about the planes, so ask the image for it
1377 */
1378 if (!draw->ext->image->queryImage(pixmap_buffer, __DRI_IMAGE_ATTRIB_NUM_PLANES,
1379 &num_planes))
1380 num_planes = 1;
1381
1382 for (i = 0; i < num_planes; i++) {
1383 __DRIimage *image = draw->ext->image->fromPlanar(pixmap_buffer, i, NULL);
1384
1385 if (!image) {
1386 assert(i == 0);
1387 image = pixmap_buffer;
1388 }
1389
1390 ret = draw->ext->image->queryImage(image, __DRI_IMAGE_ATTRIB_FD,
1391 &buffer_fds[i]);
1392 ret &= draw->ext->image->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE,
1393 &buffer->strides[i]);
1394 ret &= draw->ext->image->queryImage(image, __DRI_IMAGE_ATTRIB_OFFSET,
1395 &buffer->offsets[i]);
1396 if (image != pixmap_buffer)
1397 draw->ext->image->destroyImage(image);
1398
1399 if (!ret)
1400 goto no_buffer_attrib;
1401 }
1402
1403 ret = draw->ext->image->queryImage(pixmap_buffer,
1404 __DRI_IMAGE_ATTRIB_MODIFIER_UPPER, &mod);
1405 buffer->modifier = (uint64_t) mod << 32;
1406 ret &= draw->ext->image->queryImage(pixmap_buffer,
1407 __DRI_IMAGE_ATTRIB_MODIFIER_LOWER, &mod);
1408 buffer->modifier |= (uint64_t)(mod & 0xffffffff);
1409
1410 if (!ret)
1411 buffer->modifier = DRM_FORMAT_MOD_INVALID;
1412
1413 pixmap = xcb_generate_id(draw->conn);
1414 #ifdef HAVE_DRI3_MODIFIERS
1415 if (draw->multiplanes_available &&
1416 buffer->modifier != DRM_FORMAT_MOD_INVALID) {
1417 xcb_dri3_pixmap_from_buffers(draw->conn,
1418 pixmap,
1419 draw->window,
1420 num_planes,
1421 width, height,
1422 buffer->strides[0], buffer->offsets[0],
1423 buffer->strides[1], buffer->offsets[1],
1424 buffer->strides[2], buffer->offsets[2],
1425 buffer->strides[3], buffer->offsets[3],
1426 depth, buffer->cpp * 8,
1427 buffer->modifier,
1428 buffer_fds);
1429 } else
1430 #endif
1431 {
1432 xcb_dri3_pixmap_from_buffer(draw->conn,
1433 pixmap,
1434 draw->drawable,
1435 buffer->size,
1436 width, height, buffer->strides[0],
1437 depth, buffer->cpp * 8,
1438 buffer_fds[0]);
1439 }
1440
1441 xcb_dri3_fence_from_fd(draw->conn,
1442 pixmap,
1443 (sync_fence = xcb_generate_id(draw->conn)),
1444 false,
1445 fence_fd);
1446
1447 buffer->pixmap = pixmap;
1448 buffer->own_pixmap = true;
1449 buffer->sync_fence = sync_fence;
1450 buffer->shm_fence = shm_fence;
1451 buffer->width = width;
1452 buffer->height = height;
1453
1454 /* Mark the buffer as idle
1455 */
1456 dri3_fence_set(buffer);
1457
1458 return buffer;
1459
1460 no_buffer_attrib:
1461 do {
1462 close(buffer_fds[i]);
1463 } while (--i >= 0);
1464 draw->ext->image->destroyImage(pixmap_buffer);
1465 no_linear_buffer:
1466 if (draw->is_different_gpu)
1467 draw->ext->image->destroyImage(buffer->image);
1468 no_image:
1469 free(buffer);
1470 no_buffer:
1471 xshmfence_unmap_shm(shm_fence);
1472 no_shm_fence:
1473 close(fence_fd);
1474 return NULL;
1475 }
1476
1477 /** loader_dri3_update_drawable
1478 *
1479 * Called the first time we use the drawable and then
1480 * after we receive present configure notify events to
1481 * track the geometry of the drawable
1482 */
1483 static int
1484 dri3_update_drawable(struct loader_dri3_drawable *draw)
1485 {
1486 mtx_lock(&draw->mtx);
1487 if (draw->first_init) {
1488 xcb_get_geometry_cookie_t geom_cookie;
1489 xcb_get_geometry_reply_t *geom_reply;
1490 xcb_void_cookie_t cookie;
1491 xcb_generic_error_t *error;
1492 xcb_present_query_capabilities_cookie_t present_capabilities_cookie;
1493 xcb_present_query_capabilities_reply_t *present_capabilities_reply;
1494 xcb_window_t root_win;
1495
1496 draw->first_init = false;
1497
1498 /* Try to select for input on the window.
1499 *
1500 * If the drawable is a window, this will get our events
1501 * delivered.
1502 *
1503 * Otherwise, we'll get a BadWindow error back from this request which
1504 * will let us know that the drawable is a pixmap instead.
1505 */
1506
1507 draw->eid = xcb_generate_id(draw->conn);
1508 cookie =
1509 xcb_present_select_input_checked(draw->conn, draw->eid, draw->drawable,
1510 XCB_PRESENT_EVENT_MASK_CONFIGURE_NOTIFY |
1511 XCB_PRESENT_EVENT_MASK_COMPLETE_NOTIFY |
1512 XCB_PRESENT_EVENT_MASK_IDLE_NOTIFY);
1513
1514 present_capabilities_cookie =
1515 xcb_present_query_capabilities(draw->conn, draw->drawable);
1516
1517 /* Create an XCB event queue to hold present events outside of the usual
1518 * application event queue
1519 */
1520 draw->special_event = xcb_register_for_special_xge(draw->conn,
1521 &xcb_present_id,
1522 draw->eid,
1523 draw->stamp);
1524 geom_cookie = xcb_get_geometry(draw->conn, draw->drawable);
1525
1526 geom_reply = xcb_get_geometry_reply(draw->conn, geom_cookie, NULL);
1527
1528 if (!geom_reply) {
1529 mtx_unlock(&draw->mtx);
1530 return false;
1531 }
1532 draw->width = geom_reply->width;
1533 draw->height = geom_reply->height;
1534 draw->depth = geom_reply->depth;
1535 draw->vtable->set_drawable_size(draw, draw->width, draw->height);
1536 root_win = geom_reply->root;
1537
1538 free(geom_reply);
1539
1540 draw->is_pixmap = false;
1541
1542 /* Check to see if our select input call failed. If it failed with a
1543 * BadWindow error, then assume the drawable is a pixmap. Destroy the
1544 * special event queue created above and mark the drawable as a pixmap
1545 */
1546
1547 error = xcb_request_check(draw->conn, cookie);
1548
1549 present_capabilities_reply =
1550 xcb_present_query_capabilities_reply(draw->conn,
1551 present_capabilities_cookie,
1552 NULL);
1553
1554 if (present_capabilities_reply) {
1555 draw->present_capabilities = present_capabilities_reply->capabilities;
1556 free(present_capabilities_reply);
1557 } else
1558 draw->present_capabilities = 0;
1559
1560 if (error) {
1561 if (error->error_code != BadWindow) {
1562 free(error);
1563 mtx_unlock(&draw->mtx);
1564 return false;
1565 }
1566 free(error);
1567 draw->is_pixmap = true;
1568 xcb_unregister_for_special_event(draw->conn, draw->special_event);
1569 draw->special_event = NULL;
1570 }
1571
1572 if (draw->is_pixmap)
1573 draw->window = root_win;
1574 else
1575 draw->window = draw->drawable;
1576 }
1577 dri3_flush_present_events(draw);
1578 mtx_unlock(&draw->mtx);
1579 return true;
1580 }
1581
1582 __DRIimage *
1583 loader_dri3_create_image(xcb_connection_t *c,
1584 xcb_dri3_buffer_from_pixmap_reply_t *bp_reply,
1585 unsigned int format,
1586 __DRIscreen *dri_screen,
1587 const __DRIimageExtension *image,
1588 void *loaderPrivate)
1589 {
1590 int *fds;
1591 __DRIimage *image_planar, *ret;
1592 int stride, offset;
1593
1594 /* Get an FD for the pixmap object
1595 */
1596 fds = xcb_dri3_buffer_from_pixmap_reply_fds(c, bp_reply);
1597
1598 stride = bp_reply->stride;
1599 offset = 0;
1600
1601 /* createImageFromFds creates a wrapper __DRIimage structure which
1602 * can deal with multiple planes for things like Yuv images. So, once
1603 * we've gotten the planar wrapper, pull the single plane out of it and
1604 * discard the wrapper.
1605 */
1606 image_planar = image->createImageFromFds(dri_screen,
1607 bp_reply->width,
1608 bp_reply->height,
1609 image_format_to_fourcc(format),
1610 fds, 1,
1611 &stride, &offset, loaderPrivate);
1612 close(fds[0]);
1613 if (!image_planar)
1614 return NULL;
1615
1616 ret = image->fromPlanar(image_planar, 0, loaderPrivate);
1617
1618 if (!ret)
1619 ret = image_planar;
1620 else
1621 image->destroyImage(image_planar);
1622
1623 return ret;
1624 }
1625
1626 #ifdef HAVE_DRI3_MODIFIERS
1627 __DRIimage *
1628 loader_dri3_create_image_from_buffers(xcb_connection_t *c,
1629 xcb_dri3_buffers_from_pixmap_reply_t *bp_reply,
1630 unsigned int format,
1631 __DRIscreen *dri_screen,
1632 const __DRIimageExtension *image,
1633 void *loaderPrivate)
1634 {
1635 __DRIimage *ret;
1636 int *fds;
1637 uint32_t *strides_in, *offsets_in;
1638 int strides[4], offsets[4];
1639 unsigned error;
1640 int i;
1641
1642 if (bp_reply->nfd > 4)
1643 return NULL;
1644
1645 fds = xcb_dri3_buffers_from_pixmap_reply_fds(c, bp_reply);
1646 strides_in = xcb_dri3_buffers_from_pixmap_strides(bp_reply);
1647 offsets_in = xcb_dri3_buffers_from_pixmap_offsets(bp_reply);
1648 for (i = 0; i < bp_reply->nfd; i++) {
1649 strides[i] = strides_in[i];
1650 offsets[i] = offsets_in[i];
1651 }
1652
1653 ret = image->createImageFromDmaBufs2(dri_screen,
1654 bp_reply->width,
1655 bp_reply->height,
1656 image_format_to_fourcc(format),
1657 bp_reply->modifier,
1658 fds, bp_reply->nfd,
1659 strides, offsets,
1660 0, 0, 0, 0, /* UNDEFINED */
1661 &error, loaderPrivate);
1662
1663 for (i = 0; i < bp_reply->nfd; i++)
1664 close(fds[i]);
1665
1666 return ret;
1667 }
1668 #endif
1669
1670 /** dri3_get_pixmap_buffer
1671 *
1672 * Get the DRM object for a pixmap from the X server and
1673 * wrap that with a __DRIimage structure using createImageFromFds
1674 */
1675 static struct loader_dri3_buffer *
1676 dri3_get_pixmap_buffer(__DRIdrawable *driDrawable, unsigned int format,
1677 enum loader_dri3_buffer_type buffer_type,
1678 struct loader_dri3_drawable *draw)
1679 {
1680 int buf_id = loader_dri3_pixmap_buf_id(buffer_type);
1681 struct loader_dri3_buffer *buffer = draw->buffers[buf_id];
1682 xcb_drawable_t pixmap;
1683 xcb_sync_fence_t sync_fence;
1684 struct xshmfence *shm_fence;
1685 int width;
1686 int height;
1687 int fence_fd;
1688 __DRIscreen *cur_screen;
1689
1690 if (buffer)
1691 return buffer;
1692
1693 pixmap = draw->drawable;
1694
1695 buffer = calloc(1, sizeof *buffer);
1696 if (!buffer)
1697 goto no_buffer;
1698
1699 fence_fd = xshmfence_alloc_shm();
1700 if (fence_fd < 0)
1701 goto no_fence;
1702 shm_fence = xshmfence_map_shm(fence_fd);
1703 if (shm_fence == NULL) {
1704 close (fence_fd);
1705 goto no_fence;
1706 }
1707
1708 /* Get the currently-bound screen or revert to using the drawable's screen if
1709 * no contexts are currently bound. The latter case is at least necessary for
1710 * obs-studio, when using Window Capture (Xcomposite) as a Source.
1711 */
1712 cur_screen = draw->vtable->get_dri_screen();
1713 if (!cur_screen) {
1714 cur_screen = draw->dri_screen;
1715 }
1716
1717 xcb_dri3_fence_from_fd(draw->conn,
1718 pixmap,
1719 (sync_fence = xcb_generate_id(draw->conn)),
1720 false,
1721 fence_fd);
1722 #ifdef HAVE_DRI3_MODIFIERS
1723 if (draw->multiplanes_available &&
1724 draw->ext->image->base.version >= 15 &&
1725 draw->ext->image->createImageFromDmaBufs2) {
1726 xcb_dri3_buffers_from_pixmap_cookie_t bps_cookie;
1727 xcb_dri3_buffers_from_pixmap_reply_t *bps_reply;
1728
1729 bps_cookie = xcb_dri3_buffers_from_pixmap(draw->conn, pixmap);
1730 bps_reply = xcb_dri3_buffers_from_pixmap_reply(draw->conn, bps_cookie,
1731 NULL);
1732 if (!bps_reply)
1733 goto no_image;
1734 buffer->image =
1735 loader_dri3_create_image_from_buffers(draw->conn, bps_reply, format,
1736 cur_screen, draw->ext->image,
1737 buffer);
1738 width = bps_reply->width;
1739 height = bps_reply->height;
1740 free(bps_reply);
1741 } else
1742 #endif
1743 {
1744 xcb_dri3_buffer_from_pixmap_cookie_t bp_cookie;
1745 xcb_dri3_buffer_from_pixmap_reply_t *bp_reply;
1746
1747 bp_cookie = xcb_dri3_buffer_from_pixmap(draw->conn, pixmap);
1748 bp_reply = xcb_dri3_buffer_from_pixmap_reply(draw->conn, bp_cookie, NULL);
1749 if (!bp_reply)
1750 goto no_image;
1751
1752 buffer->image = loader_dri3_create_image(draw->conn, bp_reply, format,
1753 cur_screen, draw->ext->image,
1754 buffer);
1755 width = bp_reply->width;
1756 height = bp_reply->height;
1757 free(bp_reply);
1758 }
1759
1760 if (!buffer->image)
1761 goto no_image;
1762
1763 buffer->pixmap = pixmap;
1764 buffer->own_pixmap = false;
1765 buffer->width = width;
1766 buffer->height = height;
1767 buffer->shm_fence = shm_fence;
1768 buffer->sync_fence = sync_fence;
1769
1770 draw->buffers[buf_id] = buffer;
1771
1772 return buffer;
1773
1774 no_image:
1775 xcb_sync_destroy_fence(draw->conn, sync_fence);
1776 xshmfence_unmap_shm(shm_fence);
1777 no_fence:
1778 free(buffer);
1779 no_buffer:
1780 return NULL;
1781 }
1782
1783 /** dri3_get_buffer
1784 *
1785 * Find a front or back buffer, allocating new ones as necessary
1786 */
1787 static struct loader_dri3_buffer *
1788 dri3_get_buffer(__DRIdrawable *driDrawable,
1789 unsigned int format,
1790 enum loader_dri3_buffer_type buffer_type,
1791 struct loader_dri3_drawable *draw)
1792 {
1793 struct loader_dri3_buffer *buffer;
1794 bool fence_await = buffer_type == loader_dri3_buffer_back;
1795 int buf_id;
1796
1797 if (buffer_type == loader_dri3_buffer_back) {
1798 draw->back_format = format;
1799
1800 buf_id = dri3_find_back(draw);
1801
1802 if (buf_id < 0)
1803 return NULL;
1804 } else {
1805 buf_id = LOADER_DRI3_FRONT_ID;
1806 }
1807
1808 buffer = draw->buffers[buf_id];
1809
1810 /* Allocate a new buffer if there isn't an old one, if that
1811 * old one is the wrong size, or if it's suboptimal
1812 */
1813 if (!buffer || buffer->width != draw->width ||
1814 buffer->height != draw->height ||
1815 buffer->reallocate) {
1816 struct loader_dri3_buffer *new_buffer;
1817
1818 /* Allocate the new buffers
1819 */
1820 new_buffer = dri3_alloc_render_buffer(draw,
1821 format,
1822 draw->width,
1823 draw->height,
1824 draw->depth);
1825 if (!new_buffer)
1826 return NULL;
1827
1828 /* When resizing, copy the contents of the old buffer, waiting for that
1829 * copy to complete using our fences before proceeding
1830 */
1831 if ((buffer_type == loader_dri3_buffer_back ||
1832 (buffer_type == loader_dri3_buffer_front && draw->have_fake_front))
1833 && buffer) {
1834
1835 /* Fill the new buffer with data from an old buffer */
1836 if (!loader_dri3_blit_image(draw,
1837 new_buffer->image,
1838 buffer->image,
1839 0, 0, draw->width, draw->height,
1840 0, 0, 0) &&
1841 !buffer->linear_buffer) {
1842 dri3_fence_reset(draw->conn, new_buffer);
1843 dri3_copy_area(draw->conn,
1844 buffer->pixmap,
1845 new_buffer->pixmap,
1846 dri3_drawable_gc(draw),
1847 0, 0, 0, 0,
1848 draw->width, draw->height);
1849 dri3_fence_trigger(draw->conn, new_buffer);
1850 fence_await = true;
1851 }
1852 dri3_free_render_buffer(draw, buffer);
1853 } else if (buffer_type == loader_dri3_buffer_front) {
1854 /* Fill the new fake front with data from a real front */
1855 loader_dri3_swapbuffer_barrier(draw);
1856 dri3_fence_reset(draw->conn, new_buffer);
1857 dri3_copy_area(draw->conn,
1858 draw->drawable,
1859 new_buffer->pixmap,
1860 dri3_drawable_gc(draw),
1861 0, 0, 0, 0,
1862 draw->width, draw->height);
1863 dri3_fence_trigger(draw->conn, new_buffer);
1864
1865 if (new_buffer->linear_buffer) {
1866 dri3_fence_await(draw->conn, draw, new_buffer);
1867 (void) loader_dri3_blit_image(draw,
1868 new_buffer->image,
1869 new_buffer->linear_buffer,
1870 0, 0, draw->width, draw->height,
1871 0, 0, 0);
1872 } else
1873 fence_await = true;
1874 }
1875 buffer = new_buffer;
1876 draw->buffers[buf_id] = buffer;
1877 }
1878
1879 if (fence_await)
1880 dri3_fence_await(draw->conn, draw, buffer);
1881
1882 /*
1883 * Do we need to preserve the content of a previous buffer?
1884 *
1885 * Note that this blit is needed only to avoid a wait for a buffer that
1886 * is currently in the flip chain or being scanned out from. That's really
1887 * a tradeoff. If we're ok with the wait we can reduce the number of back
1888 * buffers to 1 for SWAP_EXCHANGE, and 1 for SWAP_COPY,
1889 * but in the latter case we must disallow page-flipping.
1890 */
1891 if (buffer_type == loader_dri3_buffer_back &&
1892 draw->cur_blit_source != -1 &&
1893 draw->buffers[draw->cur_blit_source] &&
1894 buffer != draw->buffers[draw->cur_blit_source]) {
1895
1896 struct loader_dri3_buffer *source = draw->buffers[draw->cur_blit_source];
1897
1898 /* Avoid flushing here. Will propably do good for tiling hardware. */
1899 (void) loader_dri3_blit_image(draw,
1900 buffer->image,
1901 source->image,
1902 0, 0, draw->width, draw->height,
1903 0, 0, 0);
1904 buffer->last_swap = source->last_swap;
1905 draw->cur_blit_source = -1;
1906 }
1907 /* Return the requested buffer */
1908 return buffer;
1909 }
1910
1911 /** dri3_free_buffers
1912 *
1913 * Free the front bufffer or all of the back buffers. Used
1914 * when the application changes which buffers it needs
1915 */
1916 static void
1917 dri3_free_buffers(__DRIdrawable *driDrawable,
1918 enum loader_dri3_buffer_type buffer_type,
1919 struct loader_dri3_drawable *draw)
1920 {
1921 struct loader_dri3_buffer *buffer;
1922 int first_id;
1923 int n_id;
1924 int buf_id;
1925
1926 switch (buffer_type) {
1927 case loader_dri3_buffer_back:
1928 first_id = LOADER_DRI3_BACK_ID(0);
1929 n_id = LOADER_DRI3_MAX_BACK;
1930 draw->cur_blit_source = -1;
1931 break;
1932 case loader_dri3_buffer_front:
1933 first_id = LOADER_DRI3_FRONT_ID;
1934 /* Don't free a fake front holding new backbuffer content. */
1935 n_id = (draw->cur_blit_source == LOADER_DRI3_FRONT_ID) ? 0 : 1;
1936 }
1937
1938 for (buf_id = first_id; buf_id < first_id + n_id; buf_id++) {
1939 buffer = draw->buffers[buf_id];
1940 if (buffer) {
1941 dri3_free_render_buffer(draw, buffer);
1942 draw->buffers[buf_id] = NULL;
1943 }
1944 }
1945 }
1946
1947 /** loader_dri3_get_buffers
1948 *
1949 * The published buffer allocation API.
1950 * Returns all of the necessary buffers, allocating
1951 * as needed.
1952 */
1953 int
1954 loader_dri3_get_buffers(__DRIdrawable *driDrawable,
1955 unsigned int format,
1956 uint32_t *stamp,
1957 void *loaderPrivate,
1958 uint32_t buffer_mask,
1959 struct __DRIimageList *buffers)
1960 {
1961 struct loader_dri3_drawable *draw = loaderPrivate;
1962 struct loader_dri3_buffer *front, *back;
1963 int buf_id;
1964
1965 buffers->image_mask = 0;
1966 buffers->front = NULL;
1967 buffers->back = NULL;
1968
1969 front = NULL;
1970 back = NULL;
1971
1972 if (!dri3_update_drawable(draw))
1973 return false;
1974
1975 dri3_update_num_back(draw);
1976
1977 /* Free no longer needed back buffers */
1978 for (buf_id = draw->num_back; buf_id < LOADER_DRI3_MAX_BACK; buf_id++) {
1979 if (draw->cur_blit_source != buf_id && draw->buffers[buf_id]) {
1980 dri3_free_render_buffer(draw, draw->buffers[buf_id]);
1981 draw->buffers[buf_id] = NULL;
1982 }
1983 }
1984
1985 /* pixmaps always have front buffers.
1986 * Exchange swaps also mandate fake front buffers.
1987 */
1988 if (draw->is_pixmap || draw->swap_method == __DRI_ATTRIB_SWAP_EXCHANGE)
1989 buffer_mask |= __DRI_IMAGE_BUFFER_FRONT;
1990
1991 if (buffer_mask & __DRI_IMAGE_BUFFER_FRONT) {
1992 /* All pixmaps are owned by the server gpu.
1993 * When we use a different gpu, we can't use the pixmap
1994 * as buffer since it is potentially tiled a way
1995 * our device can't understand. In this case, use
1996 * a fake front buffer. Hopefully the pixmap
1997 * content will get synced with the fake front
1998 * buffer.
1999 */
2000 if (draw->is_pixmap && !draw->is_different_gpu)
2001 front = dri3_get_pixmap_buffer(driDrawable,
2002 format,
2003 loader_dri3_buffer_front,
2004 draw);
2005 else
2006 front = dri3_get_buffer(driDrawable,
2007 format,
2008 loader_dri3_buffer_front,
2009 draw);
2010
2011 if (!front)
2012 return false;
2013 } else {
2014 dri3_free_buffers(driDrawable, loader_dri3_buffer_front, draw);
2015 draw->have_fake_front = 0;
2016 }
2017
2018 if (buffer_mask & __DRI_IMAGE_BUFFER_BACK) {
2019 back = dri3_get_buffer(driDrawable,
2020 format,
2021 loader_dri3_buffer_back,
2022 draw);
2023 if (!back)
2024 return false;
2025 draw->have_back = 1;
2026 } else {
2027 dri3_free_buffers(driDrawable, loader_dri3_buffer_back, draw);
2028 draw->have_back = 0;
2029 }
2030
2031 if (front) {
2032 buffers->image_mask |= __DRI_IMAGE_BUFFER_FRONT;
2033 buffers->front = front->image;
2034 draw->have_fake_front = draw->is_different_gpu || !draw->is_pixmap;
2035 }
2036
2037 if (back) {
2038 buffers->image_mask |= __DRI_IMAGE_BUFFER_BACK;
2039 buffers->back = back->image;
2040 }
2041
2042 draw->stamp = stamp;
2043
2044 return true;
2045 }
2046
2047 /** loader_dri3_update_drawable_geometry
2048 *
2049 * Get the current drawable geometry.
2050 */
2051 void
2052 loader_dri3_update_drawable_geometry(struct loader_dri3_drawable *draw)
2053 {
2054 xcb_get_geometry_cookie_t geom_cookie;
2055 xcb_get_geometry_reply_t *geom_reply;
2056
2057 geom_cookie = xcb_get_geometry(draw->conn, draw->drawable);
2058
2059 geom_reply = xcb_get_geometry_reply(draw->conn, geom_cookie, NULL);
2060
2061 if (geom_reply) {
2062 draw->width = geom_reply->width;
2063 draw->height = geom_reply->height;
2064 draw->vtable->set_drawable_size(draw, draw->width, draw->height);
2065 draw->ext->flush->invalidate(draw->dri_drawable);
2066
2067 free(geom_reply);
2068 }
2069 }
2070
2071
2072 /**
2073 * Make sure the server has flushed all pending swap buffers to hardware
2074 * for this drawable. Ideally we'd want to send an X protocol request to
2075 * have the server block our connection until the swaps are complete. That
2076 * would avoid the potential round-trip here.
2077 */
2078 void
2079 loader_dri3_swapbuffer_barrier(struct loader_dri3_drawable *draw)
2080 {
2081 int64_t ust, msc, sbc;
2082
2083 (void) loader_dri3_wait_for_sbc(draw, 0, &ust, &msc, &sbc);
2084 }
2085
2086 /**
2087 * Perform any cleanup associated with a close screen operation.
2088 * \param dri_screen[in,out] Pointer to __DRIscreen about to be closed.
2089 *
2090 * This function destroys the screen's cached swap context if any.
2091 */
2092 void
2093 loader_dri3_close_screen(__DRIscreen *dri_screen)
2094 {
2095 mtx_lock(&blit_context.mtx);
2096 if (blit_context.ctx && blit_context.cur_screen == dri_screen) {
2097 blit_context.core->destroyContext(blit_context.ctx);
2098 blit_context.ctx = NULL;
2099 }
2100 mtx_unlock(&blit_context.mtx);
2101 }
2102
2103 /**
2104 * Find a backbuffer slot - potentially allocating a back buffer
2105 *
2106 * \param draw[in,out] Pointer to the drawable for which to find back.
2107 * \return Pointer to a new back buffer or NULL if allocation failed or was
2108 * not mandated.
2109 *
2110 * Find a potentially new back buffer, and if it's not been allocated yet and
2111 * in addition needs initializing, then try to allocate and initialize it.
2112 */
2113 #include <stdio.h>
2114 static struct loader_dri3_buffer *
2115 dri3_find_back_alloc(struct loader_dri3_drawable *draw)
2116 {
2117 struct loader_dri3_buffer *back;
2118 int id;
2119
2120 id = dri3_find_back(draw);
2121 if (id < 0)
2122 return NULL;
2123
2124 back = draw->buffers[id];
2125 /* Allocate a new back if we haven't got one */
2126 if (!back && draw->back_format != __DRI_IMAGE_FORMAT_NONE &&
2127 dri3_update_drawable(draw))
2128 back = dri3_alloc_render_buffer(draw, draw->back_format,
2129 draw->width, draw->height, draw->depth);
2130
2131 if (!back)
2132 return NULL;
2133
2134 draw->buffers[id] = back;
2135
2136 /* If necessary, prefill the back with data according to swap_method mode. */
2137 if (draw->cur_blit_source != -1 &&
2138 draw->buffers[draw->cur_blit_source] &&
2139 back != draw->buffers[draw->cur_blit_source]) {
2140 struct loader_dri3_buffer *source = draw->buffers[draw->cur_blit_source];
2141
2142 dri3_fence_await(draw->conn, draw, source);
2143 dri3_fence_await(draw->conn, draw, back);
2144 (void) loader_dri3_blit_image(draw,
2145 back->image,
2146 source->image,
2147 0, 0, draw->width, draw->height,
2148 0, 0, 0);
2149 back->last_swap = source->last_swap;
2150 draw->cur_blit_source = -1;
2151 }
2152
2153 return back;
2154 }