2 * Copyright © 2013 Keith Packard
3 * Copyright © 2015 Boyan Ding
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.
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
28 #include <X11/xshmfence.h>
31 #include <xcb/present.h>
33 #include <X11/Xlib-xcb.h>
35 #include <c11/threads.h>
36 #include "loader_dri3_helper.h"
38 /* From xmlpool/options.h, user exposed so should be stable */
39 #define DRI_CONF_VBLANK_NEVER 0
40 #define DRI_CONF_VBLANK_DEF_INTERVAL_0 1
41 #define DRI_CONF_VBLANK_DEF_INTERVAL_1 2
42 #define DRI_CONF_VBLANK_ALWAYS_SYNC 3
45 * A cached blit context.
47 struct loader_dri3_blit_context
{
50 __DRIscreen
*cur_screen
;
51 const __DRIcoreExtension
*core
;
54 /* For simplicity we maintain the cache only for a single screen at a time */
55 static struct loader_dri3_blit_context blit_context
= {
56 _MTX_INITIALIZER_NP
, NULL
60 dri3_flush_present_events(struct loader_dri3_drawable
*draw
);
63 * Do we have blit functionality in the image blit extension?
65 * \param draw[in] The drawable intended to blit from / to.
66 * \return true if we have blit functionality. false otherwise.
68 static bool loader_dri3_have_image_blit(const struct loader_dri3_drawable
*draw
)
70 return draw
->ext
->image
->base
.version
>= 9 &&
71 draw
->ext
->image
->blitImage
!= NULL
;
75 * Get and lock (for use with the current thread) a dri context associated
76 * with the drawable's dri screen. The context is intended to be used with
77 * the dri image extension's blitImage method.
79 * \param draw[in] Pointer to the drawable whose dri screen we want a
81 * \return A dri context or NULL if context creation failed.
83 * When the caller is done with the context (even if the context returned was
84 * NULL), the caller must call loader_dri3_blit_context_put.
87 loader_dri3_blit_context_get(struct loader_dri3_drawable
*draw
)
89 mtx_lock(&blit_context
.mtx
);
91 if (blit_context
.ctx
&& blit_context
.cur_screen
!= draw
->dri_screen
) {
92 blit_context
.core
->destroyContext(blit_context
.ctx
);
93 blit_context
.ctx
= NULL
;
96 if (!blit_context
.ctx
) {
97 blit_context
.ctx
= draw
->ext
->core
->createNewContext(draw
->dri_screen
,
99 blit_context
.cur_screen
= draw
->dri_screen
;
100 blit_context
.core
= draw
->ext
->core
;
103 return blit_context
.ctx
;
107 * Release (for use with other threads) a dri context previously obtained using
108 * loader_dri3_blit_context_get.
111 loader_dri3_blit_context_put(void)
113 mtx_unlock(&blit_context
.mtx
);
117 * Blit (parts of) the contents of a DRI image to another dri image
119 * \param draw[in] The drawable which owns the images.
120 * \param dst[in] The destination image.
121 * \param src[in] The source image.
122 * \param dstx0[in] Start destination coordinate.
123 * \param dsty0[in] Start destination coordinate.
124 * \param width[in] Blit width.
125 * \param height[in] Blit height.
126 * \param srcx0[in] Start source coordinate.
127 * \param srcy0[in] Start source coordinate.
128 * \param flush_flag[in] Image blit flush flag.
129 * \return true iff successful.
132 loader_dri3_blit_image(struct loader_dri3_drawable
*draw
,
133 __DRIimage
*dst
, __DRIimage
*src
,
134 int dstx0
, int dsty0
, int width
, int height
,
135 int srcx0
, int srcy0
, int flush_flag
)
137 __DRIcontext
*dri_context
;
138 bool use_blit_context
= false;
140 if (!loader_dri3_have_image_blit(draw
))
143 dri_context
= draw
->vtable
->get_dri_context(draw
);
145 if (!dri_context
|| !draw
->vtable
->in_current_context(draw
)) {
146 dri_context
= loader_dri3_blit_context_get(draw
);
147 use_blit_context
= true;
148 flush_flag
|= __BLIT_FLAG_FLUSH
;
152 draw
->ext
->image
->blitImage(dri_context
, dst
, src
, dstx0
, dsty0
,
153 width
, height
, srcx0
, srcy0
,
154 width
, height
, flush_flag
);
156 if (use_blit_context
)
157 loader_dri3_blit_context_put();
159 return dri_context
!= NULL
;
163 dri3_fence_reset(xcb_connection_t
*c
, struct loader_dri3_buffer
*buffer
)
165 xshmfence_reset(buffer
->shm_fence
);
169 dri3_fence_set(struct loader_dri3_buffer
*buffer
)
171 xshmfence_trigger(buffer
->shm_fence
);
175 dri3_fence_trigger(xcb_connection_t
*c
, struct loader_dri3_buffer
*buffer
)
177 xcb_sync_trigger_fence(c
, buffer
->sync_fence
);
181 dri3_fence_await(xcb_connection_t
*c
, struct loader_dri3_buffer
*buffer
)
184 xshmfence_await(buffer
->shm_fence
);
188 dri3_update_num_back(struct loader_dri3_drawable
*draw
)
197 loader_dri3_set_swap_interval(struct loader_dri3_drawable
*draw
, int interval
)
199 draw
->swap_interval
= interval
;
200 dri3_update_num_back(draw
);
203 /** dri3_free_render_buffer
205 * Free everything associated with one render buffer including pixmap, fence
206 * stuff and the driver image
209 dri3_free_render_buffer(struct loader_dri3_drawable
*draw
,
210 struct loader_dri3_buffer
*buffer
)
212 if (buffer
->own_pixmap
)
213 xcb_free_pixmap(draw
->conn
, buffer
->pixmap
);
214 xcb_sync_destroy_fence(draw
->conn
, buffer
->sync_fence
);
215 xshmfence_unmap_shm(buffer
->shm_fence
);
216 draw
->ext
->image
->destroyImage(buffer
->image
);
217 if (buffer
->linear_buffer
)
218 draw
->ext
->image
->destroyImage(buffer
->linear_buffer
);
223 loader_dri3_drawable_fini(struct loader_dri3_drawable
*draw
)
227 draw
->ext
->core
->destroyDrawable(draw
->dri_drawable
);
229 for (i
= 0; i
< LOADER_DRI3_NUM_BUFFERS
; i
++) {
230 if (draw
->buffers
[i
])
231 dri3_free_render_buffer(draw
, draw
->buffers
[i
]);
234 if (draw
->special_event
) {
235 xcb_void_cookie_t cookie
=
236 xcb_present_select_input_checked(draw
->conn
, draw
->eid
, draw
->drawable
,
237 XCB_PRESENT_EVENT_MASK_NO_EVENT
);
239 xcb_discard_reply(draw
->conn
, cookie
.sequence
);
240 xcb_unregister_for_special_event(draw
->conn
, draw
->special_event
);
245 loader_dri3_drawable_init(xcb_connection_t
*conn
,
246 xcb_drawable_t drawable
,
247 __DRIscreen
*dri_screen
,
248 bool is_different_gpu
,
249 const __DRIconfig
*dri_config
,
250 struct loader_dri3_extensions
*ext
,
251 const struct loader_dri3_vtable
*vtable
,
252 struct loader_dri3_drawable
*draw
)
254 xcb_get_geometry_cookie_t cookie
;
255 xcb_get_geometry_reply_t
*reply
;
256 xcb_generic_error_t
*error
;
257 GLint vblank_mode
= DRI_CONF_VBLANK_DEF_INTERVAL_1
;
262 draw
->vtable
= vtable
;
263 draw
->drawable
= drawable
;
264 draw
->dri_screen
= dri_screen
;
265 draw
->is_different_gpu
= is_different_gpu
;
268 draw
->have_fake_front
= 0;
269 draw
->first_init
= true;
271 draw
->cur_blit_source
= -1;
273 if (draw
->ext
->config
)
274 draw
->ext
->config
->configQueryi(draw
->dri_screen
,
275 "vblank_mode", &vblank_mode
);
277 switch (vblank_mode
) {
278 case DRI_CONF_VBLANK_NEVER
:
279 case DRI_CONF_VBLANK_DEF_INTERVAL_0
:
282 case DRI_CONF_VBLANK_DEF_INTERVAL_1
:
283 case DRI_CONF_VBLANK_ALWAYS_SYNC
:
288 draw
->swap_interval
= swap_interval
;
290 dri3_update_num_back(draw
);
292 /* Create a new drawable */
294 draw
->ext
->image_driver
->createNewDrawable(dri_screen
,
298 if (!draw
->dri_drawable
)
301 cookie
= xcb_get_geometry(draw
->conn
, draw
->drawable
);
302 reply
= xcb_get_geometry_reply(draw
->conn
, cookie
, &error
);
303 if (reply
== NULL
|| error
!= NULL
) {
304 draw
->ext
->core
->destroyDrawable(draw
->dri_drawable
);
308 draw
->width
= reply
->width
;
309 draw
->height
= reply
->height
;
310 draw
->depth
= reply
->depth
;
311 draw
->vtable
->set_drawable_size(draw
, draw
->width
, draw
->height
);
314 draw
->swap_method
= __DRI_ATTRIB_SWAP_UNDEFINED
;
315 if (draw
->ext
->core
->base
.version
>= 2) {
316 (void )draw
->ext
->core
->getConfigAttrib(dri_config
,
317 __DRI_ATTRIB_SWAP_METHOD
,
322 * Make sure server has the same swap interval we do for the new
325 loader_dri3_set_swap_interval(draw
, swap_interval
);
331 * Process one Present event
334 dri3_handle_present_event(struct loader_dri3_drawable
*draw
,
335 xcb_present_generic_event_t
*ge
)
337 switch (ge
->evtype
) {
338 case XCB_PRESENT_CONFIGURE_NOTIFY
: {
339 xcb_present_configure_notify_event_t
*ce
= (void *) ge
;
341 draw
->width
= ce
->width
;
342 draw
->height
= ce
->height
;
343 draw
->vtable
->set_drawable_size(draw
, draw
->width
, draw
->height
);
346 case XCB_PRESENT_COMPLETE_NOTIFY
: {
347 xcb_present_complete_notify_event_t
*ce
= (void *) ge
;
349 /* Compute the processed SBC number from the received 32-bit serial number
350 * merged with the upper 32-bits of the sent 64-bit serial number while
353 if (ce
->kind
== XCB_PRESENT_COMPLETE_KIND_PIXMAP
) {
354 draw
->recv_sbc
= (draw
->send_sbc
& 0xffffffff00000000LL
) | ce
->serial
;
355 if (draw
->recv_sbc
> draw
->send_sbc
)
356 draw
->recv_sbc
-= 0x100000000;
358 case XCB_PRESENT_COMPLETE_MODE_FLIP
:
359 draw
->flipping
= true;
361 case XCB_PRESENT_COMPLETE_MODE_COPY
:
362 draw
->flipping
= false;
365 dri3_update_num_back(draw
);
367 if (draw
->vtable
->show_fps
)
368 draw
->vtable
->show_fps(draw
, ce
->ust
);
373 draw
->recv_msc_serial
= ce
->serial
;
374 draw
->notify_ust
= ce
->ust
;
375 draw
->notify_msc
= ce
->msc
;
379 case XCB_PRESENT_EVENT_IDLE_NOTIFY
: {
380 xcb_present_idle_notify_event_t
*ie
= (void *) ge
;
383 for (b
= 0; b
< sizeof(draw
->buffers
) / sizeof(draw
->buffers
[0]); b
++) {
384 struct loader_dri3_buffer
*buf
= draw
->buffers
[b
];
386 if (buf
&& buf
->pixmap
== ie
->pixmap
) {
388 if (draw
->num_back
<= b
&& b
< LOADER_DRI3_MAX_BACK
) {
389 dri3_free_render_buffer(draw
, buf
);
390 draw
->buffers
[b
] = NULL
;
402 dri3_wait_for_event(struct loader_dri3_drawable
*draw
)
404 xcb_generic_event_t
*ev
;
405 xcb_present_generic_event_t
*ge
;
407 xcb_flush(draw
->conn
);
408 ev
= xcb_wait_for_special_event(draw
->conn
, draw
->special_event
);
412 dri3_handle_present_event(draw
, ge
);
416 /** loader_dri3_wait_for_msc
418 * Get the X server to send an event when the target msc/divisor/remainder is
422 loader_dri3_wait_for_msc(struct loader_dri3_drawable
*draw
,
424 int64_t divisor
, int64_t remainder
,
425 int64_t *ust
, int64_t *msc
, int64_t *sbc
)
429 msc_serial
= ++draw
->send_msc_serial
;
430 xcb_present_notify_msc(draw
->conn
,
437 xcb_flush(draw
->conn
);
439 /* Wait for the event */
440 if (draw
->special_event
) {
441 while ((int32_t) (msc_serial
- draw
->recv_msc_serial
) > 0) {
442 if (!dri3_wait_for_event(draw
))
447 *ust
= draw
->notify_ust
;
448 *msc
= draw
->notify_msc
;
449 *sbc
= draw
->recv_sbc
;
454 /** loader_dri3_wait_for_sbc
456 * Wait for the completed swap buffer count to reach the specified
457 * target. Presumably the application knows that this will be reached with
458 * outstanding complete events, or we're going to be here awhile.
461 loader_dri3_wait_for_sbc(struct loader_dri3_drawable
*draw
,
462 int64_t target_sbc
, int64_t *ust
,
463 int64_t *msc
, int64_t *sbc
)
465 /* From the GLX_OML_sync_control spec:
467 * "If <target_sbc> = 0, the function will block until all previous
468 * swaps requested with glXSwapBuffersMscOML for that window have
472 target_sbc
= draw
->send_sbc
;
474 while (draw
->recv_sbc
< target_sbc
) {
475 if (!dri3_wait_for_event(draw
))
481 *sbc
= draw
->recv_sbc
;
485 /** loader_dri3_find_back
487 * Find an idle back buffer. If there isn't one, then
488 * wait for a present idle notify event from the X server
491 dri3_find_back(struct loader_dri3_drawable
*draw
)
494 xcb_generic_event_t
*ev
;
495 xcb_present_generic_event_t
*ge
;
496 int num_to_consider
= draw
->num_back
;
498 /* Increase the likelyhood of reusing current buffer */
499 dri3_flush_present_events(draw
);
501 /* Check whether we need to reuse the current back buffer as new back.
502 * In that case, wait until it's not busy anymore.
504 if (!loader_dri3_have_image_blit(draw
) && draw
->cur_blit_source
!= -1) {
506 draw
->cur_blit_source
= -1;
510 for (b
= 0; b
< num_to_consider
; b
++) {
511 int id
= LOADER_DRI3_BACK_ID((b
+ draw
->cur_back
) % draw
->num_back
);
512 struct loader_dri3_buffer
*buffer
= draw
->buffers
[id
];
514 if (!buffer
|| !buffer
->busy
) {
519 xcb_flush(draw
->conn
);
520 ev
= xcb_wait_for_special_event(draw
->conn
, draw
->special_event
);
524 dri3_handle_present_event(draw
, ge
);
528 static xcb_gcontext_t
529 dri3_drawable_gc(struct loader_dri3_drawable
*draw
)
533 xcb_create_gc(draw
->conn
,
534 (draw
->gc
= xcb_generate_id(draw
->conn
)),
536 XCB_GC_GRAPHICS_EXPOSURES
,
543 static struct loader_dri3_buffer
*
544 dri3_back_buffer(struct loader_dri3_drawable
*draw
)
546 return draw
->buffers
[LOADER_DRI3_BACK_ID(draw
->cur_back
)];
549 static struct loader_dri3_buffer
*
550 dri3_fake_front_buffer(struct loader_dri3_drawable
*draw
)
552 return draw
->buffers
[LOADER_DRI3_FRONT_ID
];
556 dri3_copy_area(xcb_connection_t
*c
,
557 xcb_drawable_t src_drawable
,
558 xcb_drawable_t dst_drawable
,
567 xcb_void_cookie_t cookie
;
569 cookie
= xcb_copy_area_checked(c
,
579 xcb_discard_reply(c
, cookie
.sequence
);
583 * Asks the driver to flush any queued work necessary for serializing with the
584 * X command stream, and optionally the slightly more strict requirement of
585 * glFlush() equivalence (which would require flushing even if nothing had
586 * been drawn to a window system framebuffer, for example).
589 loader_dri3_flush(struct loader_dri3_drawable
*draw
,
591 enum __DRI2throttleReason throttle_reason
)
593 /* NEED TO CHECK WHETHER CONTEXT IS NULL */
594 __DRIcontext
*dri_context
= draw
->vtable
->get_dri_context(draw
);
597 draw
->ext
->flush
->flush_with_flags(dri_context
, draw
->dri_drawable
,
598 flags
, throttle_reason
);
603 loader_dri3_copy_sub_buffer(struct loader_dri3_drawable
*draw
,
605 int width
, int height
,
608 struct loader_dri3_buffer
*back
;
609 unsigned flags
= __DRI2_FLUSH_DRAWABLE
;
611 /* Check we have the right attachments */
612 if (!draw
->have_back
|| draw
->is_pixmap
)
616 flags
|= __DRI2_FLUSH_CONTEXT
;
617 loader_dri3_flush(draw
, flags
, __DRI2_THROTTLE_SWAPBUFFER
);
619 back
= dri3_back_buffer(draw
);
620 y
= draw
->height
- y
- height
;
622 if (draw
->is_different_gpu
) {
623 /* Update the linear buffer part of the back buffer
624 * for the dri3_copy_area operation
626 (void) loader_dri3_blit_image(draw
,
629 0, 0, back
->width
, back
->height
,
630 0, 0, __BLIT_FLAG_FLUSH
);
631 /* We use blit_image to update our fake front,
633 if (draw
->have_fake_front
)
634 (void) loader_dri3_blit_image(draw
,
635 dri3_fake_front_buffer(draw
)->image
,
638 x
, y
, __BLIT_FLAG_FLUSH
);
641 loader_dri3_swapbuffer_barrier(draw
);
642 dri3_fence_reset(draw
->conn
, back
);
643 dri3_copy_area(draw
->conn
,
644 dri3_back_buffer(draw
)->pixmap
,
646 dri3_drawable_gc(draw
),
647 x
, y
, x
, y
, width
, height
);
648 dri3_fence_trigger(draw
->conn
, back
);
649 /* Refresh the fake front (if present) after we just damaged the real
652 if (draw
->have_fake_front
&& !draw
->is_different_gpu
) {
653 dri3_fence_reset(draw
->conn
, dri3_fake_front_buffer(draw
));
654 dri3_copy_area(draw
->conn
,
655 dri3_back_buffer(draw
)->pixmap
,
656 dri3_fake_front_buffer(draw
)->pixmap
,
657 dri3_drawable_gc(draw
),
658 x
, y
, x
, y
, width
, height
);
659 dri3_fence_trigger(draw
->conn
, dri3_fake_front_buffer(draw
));
660 dri3_fence_await(draw
->conn
, dri3_fake_front_buffer(draw
));
662 dri3_fence_await(draw
->conn
, back
);
666 loader_dri3_copy_drawable(struct loader_dri3_drawable
*draw
,
670 loader_dri3_flush(draw
, __DRI2_FLUSH_DRAWABLE
, 0);
672 dri3_fence_reset(draw
->conn
, dri3_fake_front_buffer(draw
));
673 dri3_copy_area(draw
->conn
,
675 dri3_drawable_gc(draw
),
676 0, 0, 0, 0, draw
->width
, draw
->height
);
677 dri3_fence_trigger(draw
->conn
, dri3_fake_front_buffer(draw
));
678 dri3_fence_await(draw
->conn
, dri3_fake_front_buffer(draw
));
682 loader_dri3_wait_x(struct loader_dri3_drawable
*draw
)
684 struct loader_dri3_buffer
*front
;
686 if (draw
== NULL
|| !draw
->have_fake_front
)
689 front
= dri3_fake_front_buffer(draw
);
691 loader_dri3_copy_drawable(draw
, front
->pixmap
, draw
->drawable
);
693 /* In the psc->is_different_gpu case, the linear buffer has been updated,
694 * but not yet the tiled buffer.
695 * Copy back to the tiled buffer we use for rendering.
696 * Note that we don't need flushing.
698 if (draw
->is_different_gpu
)
699 (void) loader_dri3_blit_image(draw
,
701 front
->linear_buffer
,
702 0, 0, front
->width
, front
->height
,
707 loader_dri3_wait_gl(struct loader_dri3_drawable
*draw
)
709 struct loader_dri3_buffer
*front
;
711 if (draw
== NULL
|| !draw
->have_fake_front
)
714 front
= dri3_fake_front_buffer(draw
);
716 /* In the psc->is_different_gpu case, we update the linear_buffer
717 * before updating the real front.
719 if (draw
->is_different_gpu
)
720 (void) loader_dri3_blit_image(draw
,
721 front
->linear_buffer
,
723 0, 0, front
->width
, front
->height
,
724 0, 0, __BLIT_FLAG_FLUSH
);
725 loader_dri3_swapbuffer_barrier(draw
);
726 loader_dri3_copy_drawable(draw
, draw
->drawable
, front
->pixmap
);
729 /** dri3_flush_present_events
731 * Process any present events that have been received from the X server
734 dri3_flush_present_events(struct loader_dri3_drawable
*draw
)
736 /* Check to see if any configuration changes have occurred
737 * since we were last invoked
739 if (draw
->special_event
) {
740 xcb_generic_event_t
*ev
;
742 while ((ev
= xcb_poll_for_special_event(draw
->conn
,
743 draw
->special_event
)) != NULL
) {
744 xcb_present_generic_event_t
*ge
= (void *) ev
;
745 dri3_handle_present_event(draw
, ge
);
750 /** loader_dri3_swap_buffers_msc
752 * Make the current back buffer visible using the present extension
755 loader_dri3_swap_buffers_msc(struct loader_dri3_drawable
*draw
,
756 int64_t target_msc
, int64_t divisor
,
757 int64_t remainder
, unsigned flush_flags
,
760 struct loader_dri3_buffer
*back
;
762 uint32_t options
= XCB_PRESENT_OPTION_NONE
;
764 draw
->vtable
->flush_drawable(draw
, flush_flags
);
766 back
= draw
->buffers
[dri3_find_back(draw
)];
767 if (draw
->is_different_gpu
&& back
) {
768 /* Update the linear buffer before presenting the pixmap */
769 (void) loader_dri3_blit_image(draw
,
772 0, 0, back
->width
, back
->height
,
773 0, 0, __BLIT_FLAG_FLUSH
);
776 /* If we need to preload the new back buffer, remember the source.
777 * The force_copy parameter is used by EGL to attempt to preserve
778 * the back buffer across a call to this function.
780 if (draw
->swap_method
!= __DRI_ATTRIB_SWAP_UNDEFINED
|| force_copy
)
781 draw
->cur_blit_source
= LOADER_DRI3_BACK_ID(draw
->cur_back
);
783 /* Exchange the back and fake front. Even though the server knows about these
784 * buffers, it has no notion of back and fake front.
786 if (back
&& draw
->have_fake_front
) {
787 struct loader_dri3_buffer
*tmp
;
789 tmp
= dri3_fake_front_buffer(draw
);
790 draw
->buffers
[LOADER_DRI3_FRONT_ID
] = back
;
791 draw
->buffers
[LOADER_DRI3_BACK_ID(draw
->cur_back
)] = tmp
;
793 if (draw
->swap_method
== __DRI_ATTRIB_SWAP_COPY
|| force_copy
)
794 draw
->cur_blit_source
= LOADER_DRI3_FRONT_ID
;
797 dri3_flush_present_events(draw
);
799 if (back
&& !draw
->is_pixmap
) {
800 dri3_fence_reset(draw
->conn
, back
);
802 /* Compute when we want the frame shown by taking the last known
803 * successful MSC and adding in a swap interval for each outstanding swap
804 * request. target_msc=divisor=remainder=0 means "Use glXSwapBuffers()
808 if (target_msc
== 0 && divisor
== 0 && remainder
== 0)
809 target_msc
= draw
->msc
+ draw
->swap_interval
*
810 (draw
->send_sbc
- draw
->recv_sbc
);
811 else if (divisor
== 0 && remainder
> 0) {
812 /* From the GLX_OML_sync_control spec:
813 * "If <divisor> = 0, the swap will occur when MSC becomes
814 * greater than or equal to <target_msc>."
816 * Note that there's no mention of the remainder. The Present
817 * extension throws BadValue for remainder != 0 with divisor == 0, so
818 * just drop the passed in value.
823 /* From the GLX_EXT_swap_control spec
824 * and the EGL 1.4 spec (page 53):
826 * "If <interval> is set to a value of 0, buffer swaps are not
827 * synchronized to a video frame."
829 * Implementation note: It is possible to enable triple buffering
830 * behaviour by not using XCB_PRESENT_OPTION_ASYNC, but this should not be
833 if (draw
->swap_interval
== 0)
834 options
|= XCB_PRESENT_OPTION_ASYNC
;
836 /* If we need to populate the new back, but need to reuse the back
837 * buffer slot due to lack of local blit capabilities, make sure
838 * the server doesn't flip and we deadlock.
840 if (!loader_dri3_have_image_blit(draw
) && draw
->cur_blit_source
!= -1)
841 options
|= XCB_PRESENT_OPTION_COPY
;
844 back
->last_swap
= draw
->send_sbc
;
845 xcb_present_pixmap(draw
->conn
,
848 (uint32_t) draw
->send_sbc
,
853 None
, /* target_crtc */
860 ret
= (int64_t) draw
->send_sbc
;
862 /* Schedule a server-side back-preserving blit if necessary.
863 * This happens iff all conditions below are satisfied:
864 * a) We have a fake front,
865 * b) We need to preserve the back buffer,
866 * c) We don't have local blit capabilities.
868 if (!loader_dri3_have_image_blit(draw
) && draw
->cur_blit_source
!= -1 &&
869 draw
->cur_blit_source
!= LOADER_DRI3_BACK_ID(draw
->cur_back
)) {
870 struct loader_dri3_buffer
*new_back
= dri3_back_buffer(draw
);
871 struct loader_dri3_buffer
*src
= draw
->buffers
[draw
->cur_blit_source
];
873 dri3_fence_reset(draw
->conn
, new_back
);
874 dri3_copy_area(draw
->conn
, src
->pixmap
,
876 dri3_drawable_gc(draw
),
877 0, 0, 0, 0, draw
->width
, draw
->height
);
878 dri3_fence_trigger(draw
->conn
, new_back
);
879 new_back
->last_swap
= src
->last_swap
;
882 xcb_flush(draw
->conn
);
887 draw
->ext
->flush
->invalidate(draw
->dri_drawable
);
893 loader_dri3_query_buffer_age(struct loader_dri3_drawable
*draw
)
895 int back_id
= LOADER_DRI3_BACK_ID(dri3_find_back(draw
));
897 if (back_id
< 0 || !draw
->buffers
[back_id
])
900 if (draw
->buffers
[back_id
]->last_swap
!= 0)
901 return draw
->send_sbc
- draw
->buffers
[back_id
]->last_swap
+ 1;
908 * Wrapper around xcb_dri3_open
911 loader_dri3_open(xcb_connection_t
*conn
,
915 xcb_dri3_open_cookie_t cookie
;
916 xcb_dri3_open_reply_t
*reply
;
919 cookie
= xcb_dri3_open(conn
,
923 reply
= xcb_dri3_open_reply(conn
, cookie
, NULL
);
927 if (reply
->nfd
!= 1) {
932 fd
= xcb_dri3_open_reply_fds(conn
, reply
)[0];
934 fcntl(fd
, F_SETFD
, fcntl(fd
, F_GETFD
) | FD_CLOEXEC
);
940 dri3_cpp_for_format(uint32_t format
) {
942 case __DRI_IMAGE_FORMAT_R8
:
944 case __DRI_IMAGE_FORMAT_RGB565
:
945 case __DRI_IMAGE_FORMAT_GR88
:
947 case __DRI_IMAGE_FORMAT_XRGB8888
:
948 case __DRI_IMAGE_FORMAT_ARGB8888
:
949 case __DRI_IMAGE_FORMAT_ABGR8888
:
950 case __DRI_IMAGE_FORMAT_XBGR8888
:
951 case __DRI_IMAGE_FORMAT_XRGB2101010
:
952 case __DRI_IMAGE_FORMAT_ARGB2101010
:
953 case __DRI_IMAGE_FORMAT_SARGB8
:
955 case __DRI_IMAGE_FORMAT_NONE
:
961 /** loader_dri3_alloc_render_buffer
963 * Use the driver createImage function to construct a __DRIimage, then
964 * get a file descriptor for that and create an X pixmap from that
966 * Allocate an xshmfence for synchronization
968 static struct loader_dri3_buffer
*
969 dri3_alloc_render_buffer(struct loader_dri3_drawable
*draw
, unsigned int format
,
970 int width
, int height
, int depth
)
972 struct loader_dri3_buffer
*buffer
;
973 __DRIimage
*pixmap_buffer
;
975 xcb_sync_fence_t sync_fence
;
976 struct xshmfence
*shm_fence
;
977 int buffer_fd
, fence_fd
;
980 /* Create an xshmfence object and
981 * prepare to send that to the X server
984 fence_fd
= xshmfence_alloc_shm();
988 shm_fence
= xshmfence_map_shm(fence_fd
);
989 if (shm_fence
== NULL
)
992 /* Allocate the image from the driver
994 buffer
= calloc(1, sizeof *buffer
);
998 buffer
->cpp
= dri3_cpp_for_format(format
);
1002 if (!draw
->is_different_gpu
) {
1003 buffer
->image
= draw
->ext
->image
->createImage(draw
->dri_screen
,
1006 __DRI_IMAGE_USE_SHARE
|
1007 __DRI_IMAGE_USE_SCANOUT
|
1008 __DRI_IMAGE_USE_BACKBUFFER
,
1010 pixmap_buffer
= buffer
->image
;
1015 buffer
->image
= draw
->ext
->image
->createImage(draw
->dri_screen
,
1024 buffer
->linear_buffer
=
1025 draw
->ext
->image
->createImage(draw
->dri_screen
,
1026 width
, height
, format
,
1027 __DRI_IMAGE_USE_SHARE
|
1028 __DRI_IMAGE_USE_LINEAR
|
1029 __DRI_IMAGE_USE_BACKBUFFER
,
1031 pixmap_buffer
= buffer
->linear_buffer
;
1033 if (!buffer
->linear_buffer
)
1034 goto no_linear_buffer
;
1037 /* X wants the stride, so ask the image for it
1039 if (!draw
->ext
->image
->queryImage(pixmap_buffer
, __DRI_IMAGE_ATTRIB_STRIDE
,
1041 goto no_buffer_attrib
;
1043 buffer
->pitch
= stride
;
1045 if (!draw
->ext
->image
->queryImage(pixmap_buffer
, __DRI_IMAGE_ATTRIB_FD
,
1047 goto no_buffer_attrib
;
1049 xcb_dri3_pixmap_from_buffer(draw
->conn
,
1050 (pixmap
= xcb_generate_id(draw
->conn
)),
1053 width
, height
, buffer
->pitch
,
1054 depth
, buffer
->cpp
* 8,
1057 xcb_dri3_fence_from_fd(draw
->conn
,
1059 (sync_fence
= xcb_generate_id(draw
->conn
)),
1063 buffer
->pixmap
= pixmap
;
1064 buffer
->own_pixmap
= true;
1065 buffer
->sync_fence
= sync_fence
;
1066 buffer
->shm_fence
= shm_fence
;
1067 buffer
->width
= width
;
1068 buffer
->height
= height
;
1070 /* Mark the buffer as idle
1072 dri3_fence_set(buffer
);
1077 draw
->ext
->image
->destroyImage(pixmap_buffer
);
1079 if (draw
->is_different_gpu
)
1080 draw
->ext
->image
->destroyImage(buffer
->image
);
1084 xshmfence_unmap_shm(shm_fence
);
1090 /** loader_dri3_update_drawable
1092 * Called the first time we use the drawable and then
1093 * after we receive present configure notify events to
1094 * track the geometry of the drawable
1097 dri3_update_drawable(__DRIdrawable
*driDrawable
,
1098 struct loader_dri3_drawable
*draw
)
1100 if (draw
->first_init
) {
1101 xcb_get_geometry_cookie_t geom_cookie
;
1102 xcb_get_geometry_reply_t
*geom_reply
;
1103 xcb_void_cookie_t cookie
;
1104 xcb_generic_error_t
*error
;
1105 xcb_present_query_capabilities_cookie_t present_capabilities_cookie
;
1106 xcb_present_query_capabilities_reply_t
*present_capabilities_reply
;
1108 draw
->first_init
= false;
1110 /* Try to select for input on the window.
1112 * If the drawable is a window, this will get our events
1115 * Otherwise, we'll get a BadWindow error back from this request which
1116 * will let us know that the drawable is a pixmap instead.
1119 draw
->eid
= xcb_generate_id(draw
->conn
);
1121 xcb_present_select_input_checked(draw
->conn
, draw
->eid
, draw
->drawable
,
1122 XCB_PRESENT_EVENT_MASK_CONFIGURE_NOTIFY
|
1123 XCB_PRESENT_EVENT_MASK_COMPLETE_NOTIFY
|
1124 XCB_PRESENT_EVENT_MASK_IDLE_NOTIFY
);
1126 present_capabilities_cookie
=
1127 xcb_present_query_capabilities(draw
->conn
, draw
->drawable
);
1129 /* Create an XCB event queue to hold present events outside of the usual
1130 * application event queue
1132 draw
->special_event
= xcb_register_for_special_xge(draw
->conn
,
1136 geom_cookie
= xcb_get_geometry(draw
->conn
, draw
->drawable
);
1138 geom_reply
= xcb_get_geometry_reply(draw
->conn
, geom_cookie
, NULL
);
1143 draw
->width
= geom_reply
->width
;
1144 draw
->height
= geom_reply
->height
;
1145 draw
->depth
= geom_reply
->depth
;
1146 draw
->vtable
->set_drawable_size(draw
, draw
->width
, draw
->height
);
1150 draw
->is_pixmap
= false;
1152 /* Check to see if our select input call failed. If it failed with a
1153 * BadWindow error, then assume the drawable is a pixmap. Destroy the
1154 * special event queue created above and mark the drawable as a pixmap
1157 error
= xcb_request_check(draw
->conn
, cookie
);
1159 present_capabilities_reply
=
1160 xcb_present_query_capabilities_reply(draw
->conn
,
1161 present_capabilities_cookie
,
1164 if (present_capabilities_reply
) {
1165 draw
->present_capabilities
= present_capabilities_reply
->capabilities
;
1166 free(present_capabilities_reply
);
1168 draw
->present_capabilities
= 0;
1171 if (error
->error_code
!= BadWindow
) {
1175 draw
->is_pixmap
= true;
1176 xcb_unregister_for_special_event(draw
->conn
, draw
->special_event
);
1177 draw
->special_event
= NULL
;
1180 dri3_flush_present_events(draw
);
1184 /* the DRIimage createImage function takes __DRI_IMAGE_FORMAT codes, while
1185 * the createImageFromFds call takes __DRI_IMAGE_FOURCC codes. To avoid
1186 * complete confusion, just deal in __DRI_IMAGE_FORMAT codes for now and
1187 * translate to __DRI_IMAGE_FOURCC codes in the call to createImageFromFds
1190 image_format_to_fourcc(int format
)
1193 /* Convert from __DRI_IMAGE_FORMAT to __DRI_IMAGE_FOURCC (sigh) */
1195 case __DRI_IMAGE_FORMAT_SARGB8
: return __DRI_IMAGE_FOURCC_SARGB8888
;
1196 case __DRI_IMAGE_FORMAT_RGB565
: return __DRI_IMAGE_FOURCC_RGB565
;
1197 case __DRI_IMAGE_FORMAT_XRGB8888
: return __DRI_IMAGE_FOURCC_XRGB8888
;
1198 case __DRI_IMAGE_FORMAT_ARGB8888
: return __DRI_IMAGE_FOURCC_ARGB8888
;
1199 case __DRI_IMAGE_FORMAT_ABGR8888
: return __DRI_IMAGE_FOURCC_ABGR8888
;
1200 case __DRI_IMAGE_FORMAT_XBGR8888
: return __DRI_IMAGE_FOURCC_XBGR8888
;
1206 loader_dri3_create_image(xcb_connection_t
*c
,
1207 xcb_dri3_buffer_from_pixmap_reply_t
*bp_reply
,
1208 unsigned int format
,
1209 __DRIscreen
*dri_screen
,
1210 const __DRIimageExtension
*image
,
1211 void *loaderPrivate
)
1214 __DRIimage
*image_planar
, *ret
;
1217 /* Get an FD for the pixmap object
1219 fds
= xcb_dri3_buffer_from_pixmap_reply_fds(c
, bp_reply
);
1221 stride
= bp_reply
->stride
;
1224 /* createImageFromFds creates a wrapper __DRIimage structure which
1225 * can deal with multiple planes for things like Yuv images. So, once
1226 * we've gotten the planar wrapper, pull the single plane out of it and
1227 * discard the wrapper.
1229 image_planar
= image
->createImageFromFds(dri_screen
,
1232 image_format_to_fourcc(format
),
1234 &stride
, &offset
, loaderPrivate
);
1239 ret
= image
->fromPlanar(image_planar
, 0, loaderPrivate
);
1241 image
->destroyImage(image_planar
);
1246 /** dri3_get_pixmap_buffer
1248 * Get the DRM object for a pixmap from the X server and
1249 * wrap that with a __DRIimage structure using createImageFromFds
1251 static struct loader_dri3_buffer
*
1252 dri3_get_pixmap_buffer(__DRIdrawable
*driDrawable
, unsigned int format
,
1253 enum loader_dri3_buffer_type buffer_type
,
1254 struct loader_dri3_drawable
*draw
)
1256 int buf_id
= loader_dri3_pixmap_buf_id(buffer_type
);
1257 struct loader_dri3_buffer
*buffer
= draw
->buffers
[buf_id
];
1258 xcb_drawable_t pixmap
;
1259 xcb_dri3_buffer_from_pixmap_cookie_t bp_cookie
;
1260 xcb_dri3_buffer_from_pixmap_reply_t
*bp_reply
;
1261 xcb_sync_fence_t sync_fence
;
1262 struct xshmfence
*shm_fence
;
1268 pixmap
= draw
->drawable
;
1270 buffer
= calloc(1, sizeof *buffer
);
1274 fence_fd
= xshmfence_alloc_shm();
1277 shm_fence
= xshmfence_map_shm(fence_fd
);
1278 if (shm_fence
== NULL
) {
1283 xcb_dri3_fence_from_fd(draw
->conn
,
1285 (sync_fence
= xcb_generate_id(draw
->conn
)),
1289 bp_cookie
= xcb_dri3_buffer_from_pixmap(draw
->conn
, pixmap
);
1290 bp_reply
= xcb_dri3_buffer_from_pixmap_reply(draw
->conn
, bp_cookie
, NULL
);
1294 buffer
->image
= loader_dri3_create_image(draw
->conn
, bp_reply
, format
,
1295 draw
->dri_screen
, draw
->ext
->image
,
1300 buffer
->pixmap
= pixmap
;
1301 buffer
->own_pixmap
= false;
1302 buffer
->width
= bp_reply
->width
;
1303 buffer
->height
= bp_reply
->height
;
1304 buffer
->shm_fence
= shm_fence
;
1305 buffer
->sync_fence
= sync_fence
;
1307 draw
->buffers
[buf_id
] = buffer
;
1315 xcb_sync_destroy_fence(draw
->conn
, sync_fence
);
1316 xshmfence_unmap_shm(shm_fence
);
1325 * Find a front or back buffer, allocating new ones as necessary
1327 static struct loader_dri3_buffer
*
1328 dri3_get_buffer(__DRIdrawable
*driDrawable
,
1329 unsigned int format
,
1330 enum loader_dri3_buffer_type buffer_type
,
1331 struct loader_dri3_drawable
*draw
)
1333 struct loader_dri3_buffer
*buffer
;
1336 if (buffer_type
== loader_dri3_buffer_back
) {
1337 buf_id
= dri3_find_back(draw
);
1342 buf_id
= LOADER_DRI3_FRONT_ID
;
1345 buffer
= draw
->buffers
[buf_id
];
1347 /* Allocate a new buffer if there isn't an old one, or if that
1348 * old one is the wrong size
1350 if (!buffer
|| buffer
->width
!= draw
->width
||
1351 buffer
->height
!= draw
->height
) {
1352 struct loader_dri3_buffer
*new_buffer
;
1354 /* Allocate the new buffers
1356 new_buffer
= dri3_alloc_render_buffer(draw
,
1364 /* When resizing, copy the contents of the old buffer, waiting for that
1365 * copy to complete using our fences before proceeding
1367 switch (buffer_type
) {
1368 case loader_dri3_buffer_back
:
1370 if (!buffer
->linear_buffer
) {
1371 dri3_fence_reset(draw
->conn
, new_buffer
);
1372 dri3_fence_await(draw
->conn
, buffer
);
1373 dri3_copy_area(draw
->conn
,
1376 dri3_drawable_gc(draw
),
1378 draw
->width
, draw
->height
);
1379 dri3_fence_trigger(draw
->conn
, new_buffer
);
1380 } else if (draw
->vtable
->in_current_context(draw
)) {
1381 (void) loader_dri3_blit_image(draw
,
1384 0, 0, draw
->width
, draw
->height
,
1387 dri3_free_render_buffer(draw
, buffer
);
1390 case loader_dri3_buffer_front
:
1391 loader_dri3_swapbuffer_barrier(draw
);
1392 dri3_fence_reset(draw
->conn
, new_buffer
);
1393 dri3_copy_area(draw
->conn
,
1396 dri3_drawable_gc(draw
),
1398 draw
->width
, draw
->height
);
1399 dri3_fence_trigger(draw
->conn
, new_buffer
);
1401 if (new_buffer
->linear_buffer
&&
1402 draw
->vtable
->in_current_context(draw
)) {
1403 dri3_fence_await(draw
->conn
, new_buffer
);
1404 (void) loader_dri3_blit_image(draw
,
1406 new_buffer
->linear_buffer
,
1407 0, 0, draw
->width
, draw
->height
,
1412 buffer
= new_buffer
;
1413 draw
->buffers
[buf_id
] = buffer
;
1415 dri3_fence_await(draw
->conn
, buffer
);
1418 * Do we need to preserve the content of a previous buffer?
1420 * Note that this blit is needed only to avoid a wait for a buffer that
1421 * is currently in the flip chain or being scanned out from. That's really
1422 * a tradeoff. If we're ok with the wait we can reduce the number of back
1423 * buffers to 1 for SWAP_EXCHANGE, and 1 for SWAP_COPY,
1424 * but in the latter case we must disallow page-flipping.
1426 if (buffer_type
== loader_dri3_buffer_back
&&
1427 draw
->cur_blit_source
!= -1 &&
1428 draw
->buffers
[draw
->cur_blit_source
] &&
1429 buffer
!= draw
->buffers
[draw
->cur_blit_source
]) {
1431 struct loader_dri3_buffer
*source
= draw
->buffers
[draw
->cur_blit_source
];
1433 /* Avoid flushing here. Will propably do good for tiling hardware. */
1434 (void) loader_dri3_blit_image(draw
,
1437 0, 0, draw
->width
, draw
->height
,
1439 buffer
->last_swap
= source
->last_swap
;
1440 draw
->cur_blit_source
= -1;
1442 /* Return the requested buffer */
1446 /** dri3_free_buffers
1448 * Free the front bufffer or all of the back buffers. Used
1449 * when the application changes which buffers it needs
1452 dri3_free_buffers(__DRIdrawable
*driDrawable
,
1453 enum loader_dri3_buffer_type buffer_type
,
1454 struct loader_dri3_drawable
*draw
)
1456 struct loader_dri3_buffer
*buffer
;
1461 switch (buffer_type
) {
1462 case loader_dri3_buffer_back
:
1463 first_id
= LOADER_DRI3_BACK_ID(0);
1464 n_id
= LOADER_DRI3_MAX_BACK
;
1466 case loader_dri3_buffer_front
:
1467 first_id
= LOADER_DRI3_FRONT_ID
;
1471 for (buf_id
= first_id
; buf_id
< first_id
+ n_id
; buf_id
++) {
1472 buffer
= draw
->buffers
[buf_id
];
1474 dri3_free_render_buffer(draw
, buffer
);
1475 draw
->buffers
[buf_id
] = NULL
;
1480 /** loader_dri3_get_buffers
1482 * The published buffer allocation API.
1483 * Returns all of the necessary buffers, allocating
1487 loader_dri3_get_buffers(__DRIdrawable
*driDrawable
,
1488 unsigned int format
,
1490 void *loaderPrivate
,
1491 uint32_t buffer_mask
,
1492 struct __DRIimageList
*buffers
)
1494 struct loader_dri3_drawable
*draw
= loaderPrivate
;
1495 struct loader_dri3_buffer
*front
, *back
;
1497 buffers
->image_mask
= 0;
1498 buffers
->front
= NULL
;
1499 buffers
->back
= NULL
;
1504 if (!dri3_update_drawable(driDrawable
, draw
))
1507 /* pixmaps always have front buffers.
1508 * Exchange swaps also mandate fake front buffers.
1510 if (draw
->is_pixmap
|| draw
->swap_method
== __DRI_ATTRIB_SWAP_EXCHANGE
)
1511 buffer_mask
|= __DRI_IMAGE_BUFFER_FRONT
;
1513 if (buffer_mask
& __DRI_IMAGE_BUFFER_FRONT
) {
1514 /* All pixmaps are owned by the server gpu.
1515 * When we use a different gpu, we can't use the pixmap
1516 * as buffer since it is potentially tiled a way
1517 * our device can't understand. In this case, use
1518 * a fake front buffer. Hopefully the pixmap
1519 * content will get synced with the fake front
1522 if (draw
->is_pixmap
&& !draw
->is_different_gpu
)
1523 front
= dri3_get_pixmap_buffer(driDrawable
,
1525 loader_dri3_buffer_front
,
1528 front
= dri3_get_buffer(driDrawable
,
1530 loader_dri3_buffer_front
,
1536 dri3_free_buffers(driDrawable
, loader_dri3_buffer_front
, draw
);
1537 draw
->have_fake_front
= 0;
1540 if (buffer_mask
& __DRI_IMAGE_BUFFER_BACK
) {
1541 back
= dri3_get_buffer(driDrawable
,
1543 loader_dri3_buffer_back
,
1547 draw
->have_back
= 1;
1549 dri3_free_buffers(driDrawable
, loader_dri3_buffer_back
, draw
);
1550 draw
->have_back
= 0;
1554 buffers
->image_mask
|= __DRI_IMAGE_BUFFER_FRONT
;
1555 buffers
->front
= front
->image
;
1556 draw
->have_fake_front
= draw
->is_different_gpu
|| !draw
->is_pixmap
;
1560 buffers
->image_mask
|= __DRI_IMAGE_BUFFER_BACK
;
1561 buffers
->back
= back
->image
;
1564 draw
->stamp
= stamp
;
1569 /** loader_dri3_update_drawable_geometry
1571 * Get the current drawable geometry.
1574 loader_dri3_update_drawable_geometry(struct loader_dri3_drawable
*draw
)
1576 xcb_get_geometry_cookie_t geom_cookie
;
1577 xcb_get_geometry_reply_t
*geom_reply
;
1579 geom_cookie
= xcb_get_geometry(draw
->conn
, draw
->drawable
);
1581 geom_reply
= xcb_get_geometry_reply(draw
->conn
, geom_cookie
, NULL
);
1584 draw
->width
= geom_reply
->width
;
1585 draw
->height
= geom_reply
->height
;
1586 draw
->vtable
->set_drawable_size(draw
, draw
->width
, draw
->height
);
1594 * Make sure the server has flushed all pending swap buffers to hardware
1595 * for this drawable. Ideally we'd want to send an X protocol request to
1596 * have the server block our connection until the swaps are complete. That
1597 * would avoid the potential round-trip here.
1600 loader_dri3_swapbuffer_barrier(struct loader_dri3_drawable
*draw
)
1602 int64_t ust
, msc
, sbc
;
1604 (void) loader_dri3_wait_for_sbc(draw
, 0, &ust
, &msc
, &sbc
);
1608 * Perform any cleanup associated with a close screen operation.
1609 * \param dri_screen[in,out] Pointer to __DRIscreen about to be closed.
1611 * This function destroys the screen's cached swap context if any.
1614 loader_dri3_close_screen(__DRIscreen
*dri_screen
)
1616 mtx_lock(&blit_context
.mtx
);
1617 if (blit_context
.ctx
&& blit_context
.cur_screen
== dri_screen
) {
1618 blit_context
.core
->destroyContext(blit_context
.ctx
);
1619 blit_context
.ctx
= NULL
;
1621 mtx_unlock(&blit_context
.mtx
);