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
);
62 static struct loader_dri3_buffer
*
63 dri3_find_back_alloc(struct loader_dri3_drawable
*draw
);
66 * Do we have blit functionality in the image blit extension?
68 * \param draw[in] The drawable intended to blit from / to.
69 * \return true if we have blit functionality. false otherwise.
71 static bool loader_dri3_have_image_blit(const struct loader_dri3_drawable
*draw
)
73 return draw
->ext
->image
->base
.version
>= 9 &&
74 draw
->ext
->image
->blitImage
!= NULL
;
78 * Get and lock (for use with the current thread) a dri context associated
79 * with the drawable's dri screen. The context is intended to be used with
80 * the dri image extension's blitImage method.
82 * \param draw[in] Pointer to the drawable whose dri screen we want a
84 * \return A dri context or NULL if context creation failed.
86 * When the caller is done with the context (even if the context returned was
87 * NULL), the caller must call loader_dri3_blit_context_put.
90 loader_dri3_blit_context_get(struct loader_dri3_drawable
*draw
)
92 mtx_lock(&blit_context
.mtx
);
94 if (blit_context
.ctx
&& blit_context
.cur_screen
!= draw
->dri_screen
) {
95 blit_context
.core
->destroyContext(blit_context
.ctx
);
96 blit_context
.ctx
= NULL
;
99 if (!blit_context
.ctx
) {
100 blit_context
.ctx
= draw
->ext
->core
->createNewContext(draw
->dri_screen
,
102 blit_context
.cur_screen
= draw
->dri_screen
;
103 blit_context
.core
= draw
->ext
->core
;
106 return blit_context
.ctx
;
110 * Release (for use with other threads) a dri context previously obtained using
111 * loader_dri3_blit_context_get.
114 loader_dri3_blit_context_put(void)
116 mtx_unlock(&blit_context
.mtx
);
120 * Blit (parts of) the contents of a DRI image to another dri image
122 * \param draw[in] The drawable which owns the images.
123 * \param dst[in] The destination image.
124 * \param src[in] The source image.
125 * \param dstx0[in] Start destination coordinate.
126 * \param dsty0[in] Start destination coordinate.
127 * \param width[in] Blit width.
128 * \param height[in] Blit height.
129 * \param srcx0[in] Start source coordinate.
130 * \param srcy0[in] Start source coordinate.
131 * \param flush_flag[in] Image blit flush flag.
132 * \return true iff successful.
135 loader_dri3_blit_image(struct loader_dri3_drawable
*draw
,
136 __DRIimage
*dst
, __DRIimage
*src
,
137 int dstx0
, int dsty0
, int width
, int height
,
138 int srcx0
, int srcy0
, int flush_flag
)
140 __DRIcontext
*dri_context
;
141 bool use_blit_context
= false;
143 if (!loader_dri3_have_image_blit(draw
))
146 dri_context
= draw
->vtable
->get_dri_context(draw
);
148 if (!dri_context
|| !draw
->vtable
->in_current_context(draw
)) {
149 dri_context
= loader_dri3_blit_context_get(draw
);
150 use_blit_context
= true;
151 flush_flag
|= __BLIT_FLAG_FLUSH
;
155 draw
->ext
->image
->blitImage(dri_context
, dst
, src
, dstx0
, dsty0
,
156 width
, height
, srcx0
, srcy0
,
157 width
, height
, flush_flag
);
159 if (use_blit_context
)
160 loader_dri3_blit_context_put();
162 return dri_context
!= NULL
;
166 dri3_fence_reset(xcb_connection_t
*c
, struct loader_dri3_buffer
*buffer
)
168 xshmfence_reset(buffer
->shm_fence
);
172 dri3_fence_set(struct loader_dri3_buffer
*buffer
)
174 xshmfence_trigger(buffer
->shm_fence
);
178 dri3_fence_trigger(xcb_connection_t
*c
, struct loader_dri3_buffer
*buffer
)
180 xcb_sync_trigger_fence(c
, buffer
->sync_fence
);
184 dri3_fence_await(xcb_connection_t
*c
, struct loader_dri3_buffer
*buffer
)
187 xshmfence_await(buffer
->shm_fence
);
191 dri3_update_num_back(struct loader_dri3_drawable
*draw
)
200 loader_dri3_set_swap_interval(struct loader_dri3_drawable
*draw
, int interval
)
202 draw
->swap_interval
= interval
;
203 dri3_update_num_back(draw
);
206 /** dri3_free_render_buffer
208 * Free everything associated with one render buffer including pixmap, fence
209 * stuff and the driver image
212 dri3_free_render_buffer(struct loader_dri3_drawable
*draw
,
213 struct loader_dri3_buffer
*buffer
)
215 if (buffer
->own_pixmap
)
216 xcb_free_pixmap(draw
->conn
, buffer
->pixmap
);
217 xcb_sync_destroy_fence(draw
->conn
, buffer
->sync_fence
);
218 xshmfence_unmap_shm(buffer
->shm_fence
);
219 draw
->ext
->image
->destroyImage(buffer
->image
);
220 if (buffer
->linear_buffer
)
221 draw
->ext
->image
->destroyImage(buffer
->linear_buffer
);
226 loader_dri3_drawable_fini(struct loader_dri3_drawable
*draw
)
230 draw
->ext
->core
->destroyDrawable(draw
->dri_drawable
);
232 for (i
= 0; i
< LOADER_DRI3_NUM_BUFFERS
; i
++) {
233 if (draw
->buffers
[i
])
234 dri3_free_render_buffer(draw
, draw
->buffers
[i
]);
237 if (draw
->special_event
) {
238 xcb_void_cookie_t cookie
=
239 xcb_present_select_input_checked(draw
->conn
, draw
->eid
, draw
->drawable
,
240 XCB_PRESENT_EVENT_MASK_NO_EVENT
);
242 xcb_discard_reply(draw
->conn
, cookie
.sequence
);
243 xcb_unregister_for_special_event(draw
->conn
, draw
->special_event
);
248 loader_dri3_drawable_init(xcb_connection_t
*conn
,
249 xcb_drawable_t drawable
,
250 __DRIscreen
*dri_screen
,
251 bool is_different_gpu
,
252 const __DRIconfig
*dri_config
,
253 struct loader_dri3_extensions
*ext
,
254 const struct loader_dri3_vtable
*vtable
,
255 struct loader_dri3_drawable
*draw
)
257 xcb_get_geometry_cookie_t cookie
;
258 xcb_get_geometry_reply_t
*reply
;
259 xcb_generic_error_t
*error
;
260 GLint vblank_mode
= DRI_CONF_VBLANK_DEF_INTERVAL_1
;
265 draw
->vtable
= vtable
;
266 draw
->drawable
= drawable
;
267 draw
->dri_screen
= dri_screen
;
268 draw
->is_different_gpu
= is_different_gpu
;
271 draw
->have_fake_front
= 0;
272 draw
->first_init
= true;
274 draw
->cur_blit_source
= -1;
275 draw
->back_format
= __DRI_IMAGE_FORMAT_NONE
;
277 if (draw
->ext
->config
)
278 draw
->ext
->config
->configQueryi(draw
->dri_screen
,
279 "vblank_mode", &vblank_mode
);
281 switch (vblank_mode
) {
282 case DRI_CONF_VBLANK_NEVER
:
283 case DRI_CONF_VBLANK_DEF_INTERVAL_0
:
286 case DRI_CONF_VBLANK_DEF_INTERVAL_1
:
287 case DRI_CONF_VBLANK_ALWAYS_SYNC
:
292 draw
->swap_interval
= swap_interval
;
294 dri3_update_num_back(draw
);
296 /* Create a new drawable */
298 draw
->ext
->image_driver
->createNewDrawable(dri_screen
,
302 if (!draw
->dri_drawable
)
305 cookie
= xcb_get_geometry(draw
->conn
, draw
->drawable
);
306 reply
= xcb_get_geometry_reply(draw
->conn
, cookie
, &error
);
307 if (reply
== NULL
|| error
!= NULL
) {
308 draw
->ext
->core
->destroyDrawable(draw
->dri_drawable
);
312 draw
->width
= reply
->width
;
313 draw
->height
= reply
->height
;
314 draw
->depth
= reply
->depth
;
315 draw
->vtable
->set_drawable_size(draw
, draw
->width
, draw
->height
);
318 draw
->swap_method
= __DRI_ATTRIB_SWAP_UNDEFINED
;
319 if (draw
->ext
->core
->base
.version
>= 2) {
320 (void )draw
->ext
->core
->getConfigAttrib(dri_config
,
321 __DRI_ATTRIB_SWAP_METHOD
,
326 * Make sure server has the same swap interval we do for the new
329 loader_dri3_set_swap_interval(draw
, swap_interval
);
335 * Process one Present event
338 dri3_handle_present_event(struct loader_dri3_drawable
*draw
,
339 xcb_present_generic_event_t
*ge
)
341 switch (ge
->evtype
) {
342 case XCB_PRESENT_CONFIGURE_NOTIFY
: {
343 xcb_present_configure_notify_event_t
*ce
= (void *) ge
;
345 draw
->width
= ce
->width
;
346 draw
->height
= ce
->height
;
347 draw
->vtable
->set_drawable_size(draw
, draw
->width
, draw
->height
);
350 case XCB_PRESENT_COMPLETE_NOTIFY
: {
351 xcb_present_complete_notify_event_t
*ce
= (void *) ge
;
353 /* Compute the processed SBC number from the received 32-bit serial number
354 * merged with the upper 32-bits of the sent 64-bit serial number while
357 if (ce
->kind
== XCB_PRESENT_COMPLETE_KIND_PIXMAP
) {
358 draw
->recv_sbc
= (draw
->send_sbc
& 0xffffffff00000000LL
) | ce
->serial
;
359 if (draw
->recv_sbc
> draw
->send_sbc
)
360 draw
->recv_sbc
-= 0x100000000;
362 case XCB_PRESENT_COMPLETE_MODE_FLIP
:
363 draw
->flipping
= true;
365 case XCB_PRESENT_COMPLETE_MODE_COPY
:
366 draw
->flipping
= false;
369 dri3_update_num_back(draw
);
371 if (draw
->vtable
->show_fps
)
372 draw
->vtable
->show_fps(draw
, ce
->ust
);
377 draw
->recv_msc_serial
= ce
->serial
;
378 draw
->notify_ust
= ce
->ust
;
379 draw
->notify_msc
= ce
->msc
;
383 case XCB_PRESENT_EVENT_IDLE_NOTIFY
: {
384 xcb_present_idle_notify_event_t
*ie
= (void *) ge
;
387 for (b
= 0; b
< sizeof(draw
->buffers
) / sizeof(draw
->buffers
[0]); b
++) {
388 struct loader_dri3_buffer
*buf
= draw
->buffers
[b
];
390 if (buf
&& buf
->pixmap
== ie
->pixmap
) {
392 if (draw
->num_back
<= b
&& b
< LOADER_DRI3_MAX_BACK
) {
393 dri3_free_render_buffer(draw
, buf
);
394 draw
->buffers
[b
] = NULL
;
406 dri3_wait_for_event(struct loader_dri3_drawable
*draw
)
408 xcb_generic_event_t
*ev
;
409 xcb_present_generic_event_t
*ge
;
411 xcb_flush(draw
->conn
);
412 ev
= xcb_wait_for_special_event(draw
->conn
, draw
->special_event
);
416 dri3_handle_present_event(draw
, ge
);
420 /** loader_dri3_wait_for_msc
422 * Get the X server to send an event when the target msc/divisor/remainder is
426 loader_dri3_wait_for_msc(struct loader_dri3_drawable
*draw
,
428 int64_t divisor
, int64_t remainder
,
429 int64_t *ust
, int64_t *msc
, int64_t *sbc
)
433 msc_serial
= ++draw
->send_msc_serial
;
434 xcb_present_notify_msc(draw
->conn
,
441 xcb_flush(draw
->conn
);
443 /* Wait for the event */
444 if (draw
->special_event
) {
445 while ((int32_t) (msc_serial
- draw
->recv_msc_serial
) > 0) {
446 if (!dri3_wait_for_event(draw
))
451 *ust
= draw
->notify_ust
;
452 *msc
= draw
->notify_msc
;
453 *sbc
= draw
->recv_sbc
;
458 /** loader_dri3_wait_for_sbc
460 * Wait for the completed swap buffer count to reach the specified
461 * target. Presumably the application knows that this will be reached with
462 * outstanding complete events, or we're going to be here awhile.
465 loader_dri3_wait_for_sbc(struct loader_dri3_drawable
*draw
,
466 int64_t target_sbc
, int64_t *ust
,
467 int64_t *msc
, int64_t *sbc
)
469 /* From the GLX_OML_sync_control spec:
471 * "If <target_sbc> = 0, the function will block until all previous
472 * swaps requested with glXSwapBuffersMscOML for that window have
476 target_sbc
= draw
->send_sbc
;
478 while (draw
->recv_sbc
< target_sbc
) {
479 if (!dri3_wait_for_event(draw
))
485 *sbc
= draw
->recv_sbc
;
489 /** loader_dri3_find_back
491 * Find an idle back buffer. If there isn't one, then
492 * wait for a present idle notify event from the X server
495 dri3_find_back(struct loader_dri3_drawable
*draw
)
498 xcb_generic_event_t
*ev
;
499 xcb_present_generic_event_t
*ge
;
500 int num_to_consider
= draw
->num_back
;
502 /* Increase the likelyhood of reusing current buffer */
503 dri3_flush_present_events(draw
);
505 /* Check whether we need to reuse the current back buffer as new back.
506 * In that case, wait until it's not busy anymore.
508 if (!loader_dri3_have_image_blit(draw
) && draw
->cur_blit_source
!= -1) {
510 draw
->cur_blit_source
= -1;
514 for (b
= 0; b
< num_to_consider
; b
++) {
515 int id
= LOADER_DRI3_BACK_ID((b
+ draw
->cur_back
) % draw
->num_back
);
516 struct loader_dri3_buffer
*buffer
= draw
->buffers
[id
];
518 if (!buffer
|| !buffer
->busy
) {
523 xcb_flush(draw
->conn
);
524 ev
= xcb_wait_for_special_event(draw
->conn
, draw
->special_event
);
528 dri3_handle_present_event(draw
, ge
);
532 static xcb_gcontext_t
533 dri3_drawable_gc(struct loader_dri3_drawable
*draw
)
537 xcb_create_gc(draw
->conn
,
538 (draw
->gc
= xcb_generate_id(draw
->conn
)),
540 XCB_GC_GRAPHICS_EXPOSURES
,
547 static struct loader_dri3_buffer
*
548 dri3_back_buffer(struct loader_dri3_drawable
*draw
)
550 return draw
->buffers
[LOADER_DRI3_BACK_ID(draw
->cur_back
)];
553 static struct loader_dri3_buffer
*
554 dri3_fake_front_buffer(struct loader_dri3_drawable
*draw
)
556 return draw
->buffers
[LOADER_DRI3_FRONT_ID
];
560 dri3_copy_area(xcb_connection_t
*c
,
561 xcb_drawable_t src_drawable
,
562 xcb_drawable_t dst_drawable
,
571 xcb_void_cookie_t cookie
;
573 cookie
= xcb_copy_area_checked(c
,
583 xcb_discard_reply(c
, cookie
.sequence
);
587 * Asks the driver to flush any queued work necessary for serializing with the
588 * X command stream, and optionally the slightly more strict requirement of
589 * glFlush() equivalence (which would require flushing even if nothing had
590 * been drawn to a window system framebuffer, for example).
593 loader_dri3_flush(struct loader_dri3_drawable
*draw
,
595 enum __DRI2throttleReason throttle_reason
)
597 /* NEED TO CHECK WHETHER CONTEXT IS NULL */
598 __DRIcontext
*dri_context
= draw
->vtable
->get_dri_context(draw
);
601 draw
->ext
->flush
->flush_with_flags(dri_context
, draw
->dri_drawable
,
602 flags
, throttle_reason
);
607 loader_dri3_copy_sub_buffer(struct loader_dri3_drawable
*draw
,
609 int width
, int height
,
612 struct loader_dri3_buffer
*back
;
613 unsigned flags
= __DRI2_FLUSH_DRAWABLE
;
615 /* Check we have the right attachments */
616 if (!draw
->have_back
|| draw
->is_pixmap
)
620 flags
|= __DRI2_FLUSH_CONTEXT
;
621 loader_dri3_flush(draw
, flags
, __DRI2_THROTTLE_SWAPBUFFER
);
623 back
= dri3_find_back_alloc(draw
);
627 y
= draw
->height
- y
- height
;
629 if (draw
->is_different_gpu
) {
630 /* Update the linear buffer part of the back buffer
631 * for the dri3_copy_area operation
633 (void) loader_dri3_blit_image(draw
,
636 0, 0, back
->width
, back
->height
,
637 0, 0, __BLIT_FLAG_FLUSH
);
640 loader_dri3_swapbuffer_barrier(draw
);
641 dri3_fence_reset(draw
->conn
, back
);
642 dri3_copy_area(draw
->conn
,
645 dri3_drawable_gc(draw
),
646 x
, y
, x
, y
, width
, height
);
647 dri3_fence_trigger(draw
->conn
, back
);
648 /* Refresh the fake front (if present) after we just damaged the real
651 if (draw
->have_fake_front
&&
652 !loader_dri3_blit_image(draw
,
653 dri3_fake_front_buffer(draw
)->image
,
656 x
, y
, __BLIT_FLAG_FLUSH
) &&
657 !draw
->is_different_gpu
) {
658 dri3_fence_reset(draw
->conn
, dri3_fake_front_buffer(draw
));
659 dri3_copy_area(draw
->conn
,
661 dri3_fake_front_buffer(draw
)->pixmap
,
662 dri3_drawable_gc(draw
),
663 x
, y
, x
, y
, width
, height
);
664 dri3_fence_trigger(draw
->conn
, dri3_fake_front_buffer(draw
));
665 dri3_fence_await(draw
->conn
, dri3_fake_front_buffer(draw
));
667 dri3_fence_await(draw
->conn
, back
);
671 loader_dri3_copy_drawable(struct loader_dri3_drawable
*draw
,
675 loader_dri3_flush(draw
, __DRI2_FLUSH_DRAWABLE
, 0);
677 dri3_fence_reset(draw
->conn
, dri3_fake_front_buffer(draw
));
678 dri3_copy_area(draw
->conn
,
680 dri3_drawable_gc(draw
),
681 0, 0, 0, 0, draw
->width
, draw
->height
);
682 dri3_fence_trigger(draw
->conn
, dri3_fake_front_buffer(draw
));
683 dri3_fence_await(draw
->conn
, dri3_fake_front_buffer(draw
));
687 loader_dri3_wait_x(struct loader_dri3_drawable
*draw
)
689 struct loader_dri3_buffer
*front
;
691 if (draw
== NULL
|| !draw
->have_fake_front
)
694 front
= dri3_fake_front_buffer(draw
);
696 loader_dri3_copy_drawable(draw
, front
->pixmap
, draw
->drawable
);
698 /* In the psc->is_different_gpu case, the linear buffer has been updated,
699 * but not yet the tiled buffer.
700 * Copy back to the tiled buffer we use for rendering.
701 * Note that we don't need flushing.
703 if (draw
->is_different_gpu
)
704 (void) loader_dri3_blit_image(draw
,
706 front
->linear_buffer
,
707 0, 0, front
->width
, front
->height
,
712 loader_dri3_wait_gl(struct loader_dri3_drawable
*draw
)
714 struct loader_dri3_buffer
*front
;
716 if (draw
== NULL
|| !draw
->have_fake_front
)
719 front
= dri3_fake_front_buffer(draw
);
721 /* In the psc->is_different_gpu case, we update the linear_buffer
722 * before updating the real front.
724 if (draw
->is_different_gpu
)
725 (void) loader_dri3_blit_image(draw
,
726 front
->linear_buffer
,
728 0, 0, front
->width
, front
->height
,
729 0, 0, __BLIT_FLAG_FLUSH
);
730 loader_dri3_swapbuffer_barrier(draw
);
731 loader_dri3_copy_drawable(draw
, draw
->drawable
, front
->pixmap
);
734 /** dri3_flush_present_events
736 * Process any present events that have been received from the X server
739 dri3_flush_present_events(struct loader_dri3_drawable
*draw
)
741 /* Check to see if any configuration changes have occurred
742 * since we were last invoked
744 if (draw
->special_event
) {
745 xcb_generic_event_t
*ev
;
747 while ((ev
= xcb_poll_for_special_event(draw
->conn
,
748 draw
->special_event
)) != NULL
) {
749 xcb_present_generic_event_t
*ge
= (void *) ev
;
750 dri3_handle_present_event(draw
, ge
);
755 /** loader_dri3_swap_buffers_msc
757 * Make the current back buffer visible using the present extension
760 loader_dri3_swap_buffers_msc(struct loader_dri3_drawable
*draw
,
761 int64_t target_msc
, int64_t divisor
,
762 int64_t remainder
, unsigned flush_flags
,
765 struct loader_dri3_buffer
*back
;
767 uint32_t options
= XCB_PRESENT_OPTION_NONE
;
769 draw
->vtable
->flush_drawable(draw
, flush_flags
);
771 back
= dri3_find_back_alloc(draw
);
773 if (draw
->is_different_gpu
&& back
) {
774 /* Update the linear buffer before presenting the pixmap */
775 (void) loader_dri3_blit_image(draw
,
778 0, 0, back
->width
, back
->height
,
779 0, 0, __BLIT_FLAG_FLUSH
);
782 /* If we need to preload the new back buffer, remember the source.
783 * The force_copy parameter is used by EGL to attempt to preserve
784 * the back buffer across a call to this function.
786 if (draw
->swap_method
!= __DRI_ATTRIB_SWAP_UNDEFINED
|| force_copy
)
787 draw
->cur_blit_source
= LOADER_DRI3_BACK_ID(draw
->cur_back
);
789 /* Exchange the back and fake front. Even though the server knows about these
790 * buffers, it has no notion of back and fake front.
792 if (back
&& draw
->have_fake_front
) {
793 struct loader_dri3_buffer
*tmp
;
795 tmp
= dri3_fake_front_buffer(draw
);
796 draw
->buffers
[LOADER_DRI3_FRONT_ID
] = back
;
797 draw
->buffers
[LOADER_DRI3_BACK_ID(draw
->cur_back
)] = tmp
;
799 if (draw
->swap_method
== __DRI_ATTRIB_SWAP_COPY
|| force_copy
)
800 draw
->cur_blit_source
= LOADER_DRI3_FRONT_ID
;
803 dri3_flush_present_events(draw
);
805 if (back
&& !draw
->is_pixmap
) {
806 dri3_fence_reset(draw
->conn
, back
);
808 /* Compute when we want the frame shown by taking the last known
809 * successful MSC and adding in a swap interval for each outstanding swap
810 * request. target_msc=divisor=remainder=0 means "Use glXSwapBuffers()
814 if (target_msc
== 0 && divisor
== 0 && remainder
== 0)
815 target_msc
= draw
->msc
+ draw
->swap_interval
*
816 (draw
->send_sbc
- draw
->recv_sbc
);
817 else if (divisor
== 0 && remainder
> 0) {
818 /* From the GLX_OML_sync_control spec:
819 * "If <divisor> = 0, the swap will occur when MSC becomes
820 * greater than or equal to <target_msc>."
822 * Note that there's no mention of the remainder. The Present
823 * extension throws BadValue for remainder != 0 with divisor == 0, so
824 * just drop the passed in value.
829 /* From the GLX_EXT_swap_control spec
830 * and the EGL 1.4 spec (page 53):
832 * "If <interval> is set to a value of 0, buffer swaps are not
833 * synchronized to a video frame."
835 * Implementation note: It is possible to enable triple buffering
836 * behaviour by not using XCB_PRESENT_OPTION_ASYNC, but this should not be
839 if (draw
->swap_interval
== 0)
840 options
|= XCB_PRESENT_OPTION_ASYNC
;
842 /* If we need to populate the new back, but need to reuse the back
843 * buffer slot due to lack of local blit capabilities, make sure
844 * the server doesn't flip and we deadlock.
846 if (!loader_dri3_have_image_blit(draw
) && draw
->cur_blit_source
!= -1)
847 options
|= XCB_PRESENT_OPTION_COPY
;
850 back
->last_swap
= draw
->send_sbc
;
851 xcb_present_pixmap(draw
->conn
,
854 (uint32_t) draw
->send_sbc
,
859 None
, /* target_crtc */
866 ret
= (int64_t) draw
->send_sbc
;
868 /* Schedule a server-side back-preserving blit if necessary.
869 * This happens iff all conditions below are satisfied:
870 * a) We have a fake front,
871 * b) We need to preserve the back buffer,
872 * c) We don't have local blit capabilities.
874 if (!loader_dri3_have_image_blit(draw
) && draw
->cur_blit_source
!= -1 &&
875 draw
->cur_blit_source
!= LOADER_DRI3_BACK_ID(draw
->cur_back
)) {
876 struct loader_dri3_buffer
*new_back
= dri3_back_buffer(draw
);
877 struct loader_dri3_buffer
*src
= draw
->buffers
[draw
->cur_blit_source
];
879 dri3_fence_reset(draw
->conn
, new_back
);
880 dri3_copy_area(draw
->conn
, src
->pixmap
,
882 dri3_drawable_gc(draw
),
883 0, 0, 0, 0, draw
->width
, draw
->height
);
884 dri3_fence_trigger(draw
->conn
, new_back
);
885 new_back
->last_swap
= src
->last_swap
;
888 xcb_flush(draw
->conn
);
893 draw
->ext
->flush
->invalidate(draw
->dri_drawable
);
899 loader_dri3_query_buffer_age(struct loader_dri3_drawable
*draw
)
901 struct loader_dri3_buffer
*back
= dri3_find_back_alloc(draw
);
903 if (!back
|| back
->last_swap
== 0)
906 return draw
->send_sbc
- back
->last_swap
+ 1;
911 * Wrapper around xcb_dri3_open
914 loader_dri3_open(xcb_connection_t
*conn
,
918 xcb_dri3_open_cookie_t cookie
;
919 xcb_dri3_open_reply_t
*reply
;
922 cookie
= xcb_dri3_open(conn
,
926 reply
= xcb_dri3_open_reply(conn
, cookie
, NULL
);
930 if (reply
->nfd
!= 1) {
935 fd
= xcb_dri3_open_reply_fds(conn
, reply
)[0];
937 fcntl(fd
, F_SETFD
, fcntl(fd
, F_GETFD
) | FD_CLOEXEC
);
943 dri3_cpp_for_format(uint32_t format
) {
945 case __DRI_IMAGE_FORMAT_R8
:
947 case __DRI_IMAGE_FORMAT_RGB565
:
948 case __DRI_IMAGE_FORMAT_GR88
:
950 case __DRI_IMAGE_FORMAT_XRGB8888
:
951 case __DRI_IMAGE_FORMAT_ARGB8888
:
952 case __DRI_IMAGE_FORMAT_ABGR8888
:
953 case __DRI_IMAGE_FORMAT_XBGR8888
:
954 case __DRI_IMAGE_FORMAT_XRGB2101010
:
955 case __DRI_IMAGE_FORMAT_ARGB2101010
:
956 case __DRI_IMAGE_FORMAT_SARGB8
:
958 case __DRI_IMAGE_FORMAT_NONE
:
964 /* the DRIimage createImage function takes __DRI_IMAGE_FORMAT codes, while
965 * the createImageFromFds call takes __DRI_IMAGE_FOURCC codes. To avoid
966 * complete confusion, just deal in __DRI_IMAGE_FORMAT codes for now and
967 * translate to __DRI_IMAGE_FOURCC codes in the call to createImageFromFds
970 image_format_to_fourcc(int format
)
973 /* Convert from __DRI_IMAGE_FORMAT to __DRI_IMAGE_FOURCC (sigh) */
975 case __DRI_IMAGE_FORMAT_SARGB8
: return __DRI_IMAGE_FOURCC_SARGB8888
;
976 case __DRI_IMAGE_FORMAT_RGB565
: return __DRI_IMAGE_FOURCC_RGB565
;
977 case __DRI_IMAGE_FORMAT_XRGB8888
: return __DRI_IMAGE_FOURCC_XRGB8888
;
978 case __DRI_IMAGE_FORMAT_ARGB8888
: return __DRI_IMAGE_FOURCC_ARGB8888
;
979 case __DRI_IMAGE_FORMAT_ABGR8888
: return __DRI_IMAGE_FOURCC_ABGR8888
;
980 case __DRI_IMAGE_FORMAT_XBGR8888
: return __DRI_IMAGE_FOURCC_XBGR8888
;
985 /** loader_dri3_alloc_render_buffer
987 * Use the driver createImage function to construct a __DRIimage, then
988 * get a file descriptor for that and create an X pixmap from that
990 * Allocate an xshmfence for synchronization
992 static struct loader_dri3_buffer
*
993 dri3_alloc_render_buffer(struct loader_dri3_drawable
*draw
, unsigned int format
,
994 int width
, int height
, int depth
)
996 struct loader_dri3_buffer
*buffer
;
997 __DRIimage
*pixmap_buffer
;
999 xcb_sync_fence_t sync_fence
;
1000 struct xshmfence
*shm_fence
;
1001 int buffer_fd
, fence_fd
;
1004 /* Create an xshmfence object and
1005 * prepare to send that to the X server
1008 fence_fd
= xshmfence_alloc_shm();
1012 shm_fence
= xshmfence_map_shm(fence_fd
);
1013 if (shm_fence
== NULL
)
1016 /* Allocate the image from the driver
1018 buffer
= calloc(1, sizeof *buffer
);
1022 buffer
->cpp
= dri3_cpp_for_format(format
);
1026 if (!draw
->is_different_gpu
) {
1027 buffer
->image
= draw
->ext
->image
->createImage(draw
->dri_screen
,
1030 __DRI_IMAGE_USE_SHARE
|
1031 __DRI_IMAGE_USE_SCANOUT
|
1032 __DRI_IMAGE_USE_BACKBUFFER
,
1034 pixmap_buffer
= buffer
->image
;
1039 buffer
->image
= draw
->ext
->image
->createImage(draw
->dri_screen
,
1048 buffer
->linear_buffer
=
1049 draw
->ext
->image
->createImage(draw
->dri_screen
,
1050 width
, height
, format
,
1051 __DRI_IMAGE_USE_SHARE
|
1052 __DRI_IMAGE_USE_LINEAR
|
1053 __DRI_IMAGE_USE_BACKBUFFER
,
1055 pixmap_buffer
= buffer
->linear_buffer
;
1057 if (!buffer
->linear_buffer
)
1058 goto no_linear_buffer
;
1061 /* X wants the stride, so ask the image for it
1063 if (!draw
->ext
->image
->queryImage(pixmap_buffer
, __DRI_IMAGE_ATTRIB_STRIDE
,
1065 goto no_buffer_attrib
;
1067 buffer
->pitch
= stride
;
1069 if (!draw
->ext
->image
->queryImage(pixmap_buffer
, __DRI_IMAGE_ATTRIB_FD
,
1071 goto no_buffer_attrib
;
1073 xcb_dri3_pixmap_from_buffer(draw
->conn
,
1074 (pixmap
= xcb_generate_id(draw
->conn
)),
1077 width
, height
, buffer
->pitch
,
1078 depth
, buffer
->cpp
* 8,
1081 xcb_dri3_fence_from_fd(draw
->conn
,
1083 (sync_fence
= xcb_generate_id(draw
->conn
)),
1087 buffer
->pixmap
= pixmap
;
1088 buffer
->own_pixmap
= true;
1089 buffer
->sync_fence
= sync_fence
;
1090 buffer
->shm_fence
= shm_fence
;
1091 buffer
->width
= width
;
1092 buffer
->height
= height
;
1094 /* Mark the buffer as idle
1096 dri3_fence_set(buffer
);
1101 draw
->ext
->image
->destroyImage(pixmap_buffer
);
1103 if (draw
->is_different_gpu
)
1104 draw
->ext
->image
->destroyImage(buffer
->image
);
1108 xshmfence_unmap_shm(shm_fence
);
1114 /** loader_dri3_update_drawable
1116 * Called the first time we use the drawable and then
1117 * after we receive present configure notify events to
1118 * track the geometry of the drawable
1121 dri3_update_drawable(__DRIdrawable
*driDrawable
,
1122 struct loader_dri3_drawable
*draw
)
1124 if (draw
->first_init
) {
1125 xcb_get_geometry_cookie_t geom_cookie
;
1126 xcb_get_geometry_reply_t
*geom_reply
;
1127 xcb_void_cookie_t cookie
;
1128 xcb_generic_error_t
*error
;
1129 xcb_present_query_capabilities_cookie_t present_capabilities_cookie
;
1130 xcb_present_query_capabilities_reply_t
*present_capabilities_reply
;
1132 draw
->first_init
= false;
1134 /* Try to select for input on the window.
1136 * If the drawable is a window, this will get our events
1139 * Otherwise, we'll get a BadWindow error back from this request which
1140 * will let us know that the drawable is a pixmap instead.
1143 draw
->eid
= xcb_generate_id(draw
->conn
);
1145 xcb_present_select_input_checked(draw
->conn
, draw
->eid
, draw
->drawable
,
1146 XCB_PRESENT_EVENT_MASK_CONFIGURE_NOTIFY
|
1147 XCB_PRESENT_EVENT_MASK_COMPLETE_NOTIFY
|
1148 XCB_PRESENT_EVENT_MASK_IDLE_NOTIFY
);
1150 present_capabilities_cookie
=
1151 xcb_present_query_capabilities(draw
->conn
, draw
->drawable
);
1153 /* Create an XCB event queue to hold present events outside of the usual
1154 * application event queue
1156 draw
->special_event
= xcb_register_for_special_xge(draw
->conn
,
1160 geom_cookie
= xcb_get_geometry(draw
->conn
, draw
->drawable
);
1162 geom_reply
= xcb_get_geometry_reply(draw
->conn
, geom_cookie
, NULL
);
1167 draw
->width
= geom_reply
->width
;
1168 draw
->height
= geom_reply
->height
;
1169 draw
->depth
= geom_reply
->depth
;
1170 draw
->vtable
->set_drawable_size(draw
, draw
->width
, draw
->height
);
1174 draw
->is_pixmap
= false;
1176 /* Check to see if our select input call failed. If it failed with a
1177 * BadWindow error, then assume the drawable is a pixmap. Destroy the
1178 * special event queue created above and mark the drawable as a pixmap
1181 error
= xcb_request_check(draw
->conn
, cookie
);
1183 present_capabilities_reply
=
1184 xcb_present_query_capabilities_reply(draw
->conn
,
1185 present_capabilities_cookie
,
1188 if (present_capabilities_reply
) {
1189 draw
->present_capabilities
= present_capabilities_reply
->capabilities
;
1190 free(present_capabilities_reply
);
1192 draw
->present_capabilities
= 0;
1195 if (error
->error_code
!= BadWindow
) {
1199 draw
->is_pixmap
= true;
1200 xcb_unregister_for_special_event(draw
->conn
, draw
->special_event
);
1201 draw
->special_event
= NULL
;
1204 dri3_flush_present_events(draw
);
1209 loader_dri3_create_image(xcb_connection_t
*c
,
1210 xcb_dri3_buffer_from_pixmap_reply_t
*bp_reply
,
1211 unsigned int format
,
1212 __DRIscreen
*dri_screen
,
1213 const __DRIimageExtension
*image
,
1214 void *loaderPrivate
)
1217 __DRIimage
*image_planar
, *ret
;
1220 /* Get an FD for the pixmap object
1222 fds
= xcb_dri3_buffer_from_pixmap_reply_fds(c
, bp_reply
);
1224 stride
= bp_reply
->stride
;
1227 /* createImageFromFds creates a wrapper __DRIimage structure which
1228 * can deal with multiple planes for things like Yuv images. So, once
1229 * we've gotten the planar wrapper, pull the single plane out of it and
1230 * discard the wrapper.
1232 image_planar
= image
->createImageFromFds(dri_screen
,
1235 image_format_to_fourcc(format
),
1237 &stride
, &offset
, loaderPrivate
);
1242 ret
= image
->fromPlanar(image_planar
, 0, loaderPrivate
);
1244 image
->destroyImage(image_planar
);
1249 /** dri3_get_pixmap_buffer
1251 * Get the DRM object for a pixmap from the X server and
1252 * wrap that with a __DRIimage structure using createImageFromFds
1254 static struct loader_dri3_buffer
*
1255 dri3_get_pixmap_buffer(__DRIdrawable
*driDrawable
, unsigned int format
,
1256 enum loader_dri3_buffer_type buffer_type
,
1257 struct loader_dri3_drawable
*draw
)
1259 int buf_id
= loader_dri3_pixmap_buf_id(buffer_type
);
1260 struct loader_dri3_buffer
*buffer
= draw
->buffers
[buf_id
];
1261 xcb_drawable_t pixmap
;
1262 xcb_dri3_buffer_from_pixmap_cookie_t bp_cookie
;
1263 xcb_dri3_buffer_from_pixmap_reply_t
*bp_reply
;
1264 xcb_sync_fence_t sync_fence
;
1265 struct xshmfence
*shm_fence
;
1271 pixmap
= draw
->drawable
;
1273 buffer
= calloc(1, sizeof *buffer
);
1277 fence_fd
= xshmfence_alloc_shm();
1280 shm_fence
= xshmfence_map_shm(fence_fd
);
1281 if (shm_fence
== NULL
) {
1286 xcb_dri3_fence_from_fd(draw
->conn
,
1288 (sync_fence
= xcb_generate_id(draw
->conn
)),
1292 bp_cookie
= xcb_dri3_buffer_from_pixmap(draw
->conn
, pixmap
);
1293 bp_reply
= xcb_dri3_buffer_from_pixmap_reply(draw
->conn
, bp_cookie
, NULL
);
1297 buffer
->image
= loader_dri3_create_image(draw
->conn
, bp_reply
, format
,
1298 draw
->dri_screen
, draw
->ext
->image
,
1303 buffer
->pixmap
= pixmap
;
1304 buffer
->own_pixmap
= false;
1305 buffer
->width
= bp_reply
->width
;
1306 buffer
->height
= bp_reply
->height
;
1307 buffer
->shm_fence
= shm_fence
;
1308 buffer
->sync_fence
= sync_fence
;
1310 draw
->buffers
[buf_id
] = buffer
;
1318 xcb_sync_destroy_fence(draw
->conn
, sync_fence
);
1319 xshmfence_unmap_shm(shm_fence
);
1328 * Find a front or back buffer, allocating new ones as necessary
1330 static struct loader_dri3_buffer
*
1331 dri3_get_buffer(__DRIdrawable
*driDrawable
,
1332 unsigned int format
,
1333 enum loader_dri3_buffer_type buffer_type
,
1334 struct loader_dri3_drawable
*draw
)
1336 struct loader_dri3_buffer
*buffer
;
1339 if (buffer_type
== loader_dri3_buffer_back
) {
1340 draw
->back_format
= format
;
1342 buf_id
= dri3_find_back(draw
);
1347 buf_id
= LOADER_DRI3_FRONT_ID
;
1350 buffer
= draw
->buffers
[buf_id
];
1352 /* Allocate a new buffer if there isn't an old one, or if that
1353 * old one is the wrong size
1355 if (!buffer
|| buffer
->width
!= draw
->width
||
1356 buffer
->height
!= draw
->height
) {
1357 struct loader_dri3_buffer
*new_buffer
;
1359 /* Allocate the new buffers
1361 new_buffer
= dri3_alloc_render_buffer(draw
,
1369 /* When resizing, copy the contents of the old buffer, waiting for that
1370 * copy to complete using our fences before proceeding
1372 switch (buffer_type
) {
1373 case loader_dri3_buffer_back
:
1375 if (!buffer
->linear_buffer
) {
1376 dri3_fence_reset(draw
->conn
, new_buffer
);
1377 dri3_fence_await(draw
->conn
, buffer
);
1378 dri3_copy_area(draw
->conn
,
1381 dri3_drawable_gc(draw
),
1383 draw
->width
, draw
->height
);
1384 dri3_fence_trigger(draw
->conn
, new_buffer
);
1385 } else if (draw
->vtable
->in_current_context(draw
)) {
1386 (void) loader_dri3_blit_image(draw
,
1389 0, 0, draw
->width
, draw
->height
,
1392 dri3_free_render_buffer(draw
, buffer
);
1395 case loader_dri3_buffer_front
:
1396 loader_dri3_swapbuffer_barrier(draw
);
1397 dri3_fence_reset(draw
->conn
, new_buffer
);
1398 dri3_copy_area(draw
->conn
,
1401 dri3_drawable_gc(draw
),
1403 draw
->width
, draw
->height
);
1404 dri3_fence_trigger(draw
->conn
, new_buffer
);
1406 if (new_buffer
->linear_buffer
&&
1407 draw
->vtable
->in_current_context(draw
)) {
1408 dri3_fence_await(draw
->conn
, new_buffer
);
1409 (void) loader_dri3_blit_image(draw
,
1411 new_buffer
->linear_buffer
,
1412 0, 0, draw
->width
, draw
->height
,
1417 buffer
= new_buffer
;
1418 draw
->buffers
[buf_id
] = buffer
;
1420 dri3_fence_await(draw
->conn
, buffer
);
1423 * Do we need to preserve the content of a previous buffer?
1425 * Note that this blit is needed only to avoid a wait for a buffer that
1426 * is currently in the flip chain or being scanned out from. That's really
1427 * a tradeoff. If we're ok with the wait we can reduce the number of back
1428 * buffers to 1 for SWAP_EXCHANGE, and 1 for SWAP_COPY,
1429 * but in the latter case we must disallow page-flipping.
1431 if (buffer_type
== loader_dri3_buffer_back
&&
1432 draw
->cur_blit_source
!= -1 &&
1433 draw
->buffers
[draw
->cur_blit_source
] &&
1434 buffer
!= draw
->buffers
[draw
->cur_blit_source
]) {
1436 struct loader_dri3_buffer
*source
= draw
->buffers
[draw
->cur_blit_source
];
1438 /* Avoid flushing here. Will propably do good for tiling hardware. */
1439 (void) loader_dri3_blit_image(draw
,
1442 0, 0, draw
->width
, draw
->height
,
1444 buffer
->last_swap
= source
->last_swap
;
1445 draw
->cur_blit_source
= -1;
1447 /* Return the requested buffer */
1451 /** dri3_free_buffers
1453 * Free the front bufffer or all of the back buffers. Used
1454 * when the application changes which buffers it needs
1457 dri3_free_buffers(__DRIdrawable
*driDrawable
,
1458 enum loader_dri3_buffer_type buffer_type
,
1459 struct loader_dri3_drawable
*draw
)
1461 struct loader_dri3_buffer
*buffer
;
1466 switch (buffer_type
) {
1467 case loader_dri3_buffer_back
:
1468 first_id
= LOADER_DRI3_BACK_ID(0);
1469 n_id
= LOADER_DRI3_MAX_BACK
;
1471 case loader_dri3_buffer_front
:
1472 first_id
= LOADER_DRI3_FRONT_ID
;
1476 for (buf_id
= first_id
; buf_id
< first_id
+ n_id
; buf_id
++) {
1477 buffer
= draw
->buffers
[buf_id
];
1479 dri3_free_render_buffer(draw
, buffer
);
1480 draw
->buffers
[buf_id
] = NULL
;
1485 /** loader_dri3_get_buffers
1487 * The published buffer allocation API.
1488 * Returns all of the necessary buffers, allocating
1492 loader_dri3_get_buffers(__DRIdrawable
*driDrawable
,
1493 unsigned int format
,
1495 void *loaderPrivate
,
1496 uint32_t buffer_mask
,
1497 struct __DRIimageList
*buffers
)
1499 struct loader_dri3_drawable
*draw
= loaderPrivate
;
1500 struct loader_dri3_buffer
*front
, *back
;
1502 buffers
->image_mask
= 0;
1503 buffers
->front
= NULL
;
1504 buffers
->back
= NULL
;
1509 if (!dri3_update_drawable(driDrawable
, draw
))
1512 /* pixmaps always have front buffers.
1513 * Exchange swaps also mandate fake front buffers.
1515 if (draw
->is_pixmap
|| draw
->swap_method
== __DRI_ATTRIB_SWAP_EXCHANGE
)
1516 buffer_mask
|= __DRI_IMAGE_BUFFER_FRONT
;
1518 if (buffer_mask
& __DRI_IMAGE_BUFFER_FRONT
) {
1519 /* All pixmaps are owned by the server gpu.
1520 * When we use a different gpu, we can't use the pixmap
1521 * as buffer since it is potentially tiled a way
1522 * our device can't understand. In this case, use
1523 * a fake front buffer. Hopefully the pixmap
1524 * content will get synced with the fake front
1527 if (draw
->is_pixmap
&& !draw
->is_different_gpu
)
1528 front
= dri3_get_pixmap_buffer(driDrawable
,
1530 loader_dri3_buffer_front
,
1533 front
= dri3_get_buffer(driDrawable
,
1535 loader_dri3_buffer_front
,
1541 dri3_free_buffers(driDrawable
, loader_dri3_buffer_front
, draw
);
1542 draw
->have_fake_front
= 0;
1545 if (buffer_mask
& __DRI_IMAGE_BUFFER_BACK
) {
1546 back
= dri3_get_buffer(driDrawable
,
1548 loader_dri3_buffer_back
,
1552 draw
->have_back
= 1;
1554 dri3_free_buffers(driDrawable
, loader_dri3_buffer_back
, draw
);
1555 draw
->have_back
= 0;
1559 buffers
->image_mask
|= __DRI_IMAGE_BUFFER_FRONT
;
1560 buffers
->front
= front
->image
;
1561 draw
->have_fake_front
= draw
->is_different_gpu
|| !draw
->is_pixmap
;
1565 buffers
->image_mask
|= __DRI_IMAGE_BUFFER_BACK
;
1566 buffers
->back
= back
->image
;
1569 draw
->stamp
= stamp
;
1574 /** loader_dri3_update_drawable_geometry
1576 * Get the current drawable geometry.
1579 loader_dri3_update_drawable_geometry(struct loader_dri3_drawable
*draw
)
1581 xcb_get_geometry_cookie_t geom_cookie
;
1582 xcb_get_geometry_reply_t
*geom_reply
;
1584 geom_cookie
= xcb_get_geometry(draw
->conn
, draw
->drawable
);
1586 geom_reply
= xcb_get_geometry_reply(draw
->conn
, geom_cookie
, NULL
);
1589 draw
->width
= geom_reply
->width
;
1590 draw
->height
= geom_reply
->height
;
1591 draw
->vtable
->set_drawable_size(draw
, draw
->width
, draw
->height
);
1599 * Make sure the server has flushed all pending swap buffers to hardware
1600 * for this drawable. Ideally we'd want to send an X protocol request to
1601 * have the server block our connection until the swaps are complete. That
1602 * would avoid the potential round-trip here.
1605 loader_dri3_swapbuffer_barrier(struct loader_dri3_drawable
*draw
)
1607 int64_t ust
, msc
, sbc
;
1609 (void) loader_dri3_wait_for_sbc(draw
, 0, &ust
, &msc
, &sbc
);
1613 * Perform any cleanup associated with a close screen operation.
1614 * \param dri_screen[in,out] Pointer to __DRIscreen about to be closed.
1616 * This function destroys the screen's cached swap context if any.
1619 loader_dri3_close_screen(__DRIscreen
*dri_screen
)
1621 mtx_lock(&blit_context
.mtx
);
1622 if (blit_context
.ctx
&& blit_context
.cur_screen
== dri_screen
) {
1623 blit_context
.core
->destroyContext(blit_context
.ctx
);
1624 blit_context
.ctx
= NULL
;
1626 mtx_unlock(&blit_context
.mtx
);
1630 * Find a backbuffer slot - potentially allocating a back buffer
1632 * \param draw[in,out] Pointer to the drawable for which to find back.
1633 * \return Pointer to a new back buffer or NULL if allocation failed or was
1636 * Find a potentially new back buffer, and if it's not been allocated yet and
1637 * in addition needs initializing, then try to allocate and initialize it.
1639 static struct loader_dri3_buffer
*
1640 dri3_find_back_alloc(struct loader_dri3_drawable
*draw
)
1642 struct loader_dri3_buffer
*back
;
1645 id
= dri3_find_back(draw
);
1646 back
= (id
>= 0) ? draw
->buffers
[id
] : NULL
;
1648 if (back
|| (id
>= 0 && draw
->back_format
!= __DRI_IMAGE_FORMAT_NONE
)) {
1649 if (dri3_update_drawable(draw
->dri_drawable
, draw
)) {
1650 (void) dri3_get_buffer(draw
->dri_drawable
,
1652 loader_dri3_buffer_back
,
1654 back
= (id
>= 0) ? draw
->buffers
[id
] : NULL
;