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
29 #include <X11/xshmfence.h>
32 #include <xcb/present.h>
34 #include <X11/Xlib-xcb.h>
36 #include "loader_dri3_helper.h"
37 #include "util/macros.h"
38 #include "drm_fourcc.h"
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
47 * A cached blit context.
49 struct loader_dri3_blit_context
{
52 __DRIscreen
*cur_screen
;
53 const __DRIcoreExtension
*core
;
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
62 dri3_flush_present_events(struct loader_dri3_drawable
*draw
);
64 static struct loader_dri3_buffer
*
65 dri3_find_back_alloc(struct loader_dri3_drawable
*draw
);
68 * Do we have blit functionality in the image blit extension?
70 * \param draw[in] The drawable intended to blit from / to.
71 * \return true if we have blit functionality. false otherwise.
73 static bool loader_dri3_have_image_blit(const struct loader_dri3_drawable
*draw
)
75 return draw
->ext
->image
->base
.version
>= 9 &&
76 draw
->ext
->image
->blitImage
!= NULL
;
80 * Get and lock (for use with the current thread) a dri context associated
81 * with the drawable's dri screen. The context is intended to be used with
82 * the dri image extension's blitImage method.
84 * \param draw[in] Pointer to the drawable whose dri screen we want a
86 * \return A dri context or NULL if context creation failed.
88 * When the caller is done with the context (even if the context returned was
89 * NULL), the caller must call loader_dri3_blit_context_put.
92 loader_dri3_blit_context_get(struct loader_dri3_drawable
*draw
)
94 mtx_lock(&blit_context
.mtx
);
96 if (blit_context
.ctx
&& blit_context
.cur_screen
!= draw
->dri_screen
) {
97 blit_context
.core
->destroyContext(blit_context
.ctx
);
98 blit_context
.ctx
= NULL
;
101 if (!blit_context
.ctx
) {
102 blit_context
.ctx
= draw
->ext
->core
->createNewContext(draw
->dri_screen
,
104 blit_context
.cur_screen
= draw
->dri_screen
;
105 blit_context
.core
= draw
->ext
->core
;
108 return blit_context
.ctx
;
112 * Release (for use with other threads) a dri context previously obtained using
113 * loader_dri3_blit_context_get.
116 loader_dri3_blit_context_put(void)
118 mtx_unlock(&blit_context
.mtx
);
122 * Blit (parts of) the contents of a DRI image to another dri image
124 * \param draw[in] The drawable which owns the images.
125 * \param dst[in] The destination image.
126 * \param src[in] The source image.
127 * \param dstx0[in] Start destination coordinate.
128 * \param dsty0[in] Start destination coordinate.
129 * \param width[in] Blit width.
130 * \param height[in] Blit height.
131 * \param srcx0[in] Start source coordinate.
132 * \param srcy0[in] Start source coordinate.
133 * \param flush_flag[in] Image blit flush flag.
134 * \return true iff successful.
137 loader_dri3_blit_image(struct loader_dri3_drawable
*draw
,
138 __DRIimage
*dst
, __DRIimage
*src
,
139 int dstx0
, int dsty0
, int width
, int height
,
140 int srcx0
, int srcy0
, int flush_flag
)
142 __DRIcontext
*dri_context
;
143 bool use_blit_context
= false;
145 if (!loader_dri3_have_image_blit(draw
))
148 dri_context
= draw
->vtable
->get_dri_context(draw
);
150 if (!dri_context
|| !draw
->vtable
->in_current_context(draw
)) {
151 dri_context
= loader_dri3_blit_context_get(draw
);
152 use_blit_context
= true;
153 flush_flag
|= __BLIT_FLAG_FLUSH
;
157 draw
->ext
->image
->blitImage(dri_context
, dst
, src
, dstx0
, dsty0
,
158 width
, height
, srcx0
, srcy0
,
159 width
, height
, flush_flag
);
161 if (use_blit_context
)
162 loader_dri3_blit_context_put();
164 return dri_context
!= NULL
;
168 dri3_fence_reset(xcb_connection_t
*c
, struct loader_dri3_buffer
*buffer
)
170 xshmfence_reset(buffer
->shm_fence
);
174 dri3_fence_set(struct loader_dri3_buffer
*buffer
)
176 xshmfence_trigger(buffer
->shm_fence
);
180 dri3_fence_trigger(xcb_connection_t
*c
, struct loader_dri3_buffer
*buffer
)
182 xcb_sync_trigger_fence(c
, buffer
->sync_fence
);
186 dri3_fence_await(xcb_connection_t
*c
, struct loader_dri3_drawable
*draw
,
187 struct loader_dri3_buffer
*buffer
)
190 xshmfence_await(buffer
->shm_fence
);
192 mtx_lock(&draw
->mtx
);
193 dri3_flush_present_events(draw
);
194 mtx_unlock(&draw
->mtx
);
199 dri3_update_num_back(struct loader_dri3_drawable
*draw
)
201 if (draw
->last_present_mode
== XCB_PRESENT_COMPLETE_MODE_FLIP
)
208 loader_dri3_set_swap_interval(struct loader_dri3_drawable
*draw
, int interval
)
210 draw
->swap_interval
= interval
;
213 /** dri3_free_render_buffer
215 * Free everything associated with one render buffer including pixmap, fence
216 * stuff and the driver image
219 dri3_free_render_buffer(struct loader_dri3_drawable
*draw
,
220 struct loader_dri3_buffer
*buffer
)
222 if (buffer
->own_pixmap
)
223 xcb_free_pixmap(draw
->conn
, buffer
->pixmap
);
224 xcb_sync_destroy_fence(draw
->conn
, buffer
->sync_fence
);
225 xshmfence_unmap_shm(buffer
->shm_fence
);
226 draw
->ext
->image
->destroyImage(buffer
->image
);
227 if (buffer
->linear_buffer
)
228 draw
->ext
->image
->destroyImage(buffer
->linear_buffer
);
233 loader_dri3_drawable_fini(struct loader_dri3_drawable
*draw
)
237 draw
->ext
->core
->destroyDrawable(draw
->dri_drawable
);
239 for (i
= 0; i
< ARRAY_SIZE(draw
->buffers
); i
++) {
240 if (draw
->buffers
[i
])
241 dri3_free_render_buffer(draw
, draw
->buffers
[i
]);
244 if (draw
->special_event
) {
245 xcb_void_cookie_t cookie
=
246 xcb_present_select_input_checked(draw
->conn
, draw
->eid
, draw
->drawable
,
247 XCB_PRESENT_EVENT_MASK_NO_EVENT
);
249 xcb_discard_reply(draw
->conn
, cookie
.sequence
);
250 xcb_unregister_for_special_event(draw
->conn
, draw
->special_event
);
253 cnd_destroy(&draw
->event_cnd
);
254 mtx_destroy(&draw
->mtx
);
258 loader_dri3_drawable_init(xcb_connection_t
*conn
,
259 xcb_drawable_t drawable
,
260 __DRIscreen
*dri_screen
,
261 bool is_different_gpu
,
262 bool multiplanes_available
,
263 const __DRIconfig
*dri_config
,
264 struct loader_dri3_extensions
*ext
,
265 const struct loader_dri3_vtable
*vtable
,
266 struct loader_dri3_drawable
*draw
)
268 xcb_get_geometry_cookie_t cookie
;
269 xcb_get_geometry_reply_t
*reply
;
270 xcb_generic_error_t
*error
;
271 GLint vblank_mode
= DRI_CONF_VBLANK_DEF_INTERVAL_1
;
276 draw
->vtable
= vtable
;
277 draw
->drawable
= drawable
;
278 draw
->dri_screen
= dri_screen
;
279 draw
->is_different_gpu
= is_different_gpu
;
280 draw
->multiplanes_available
= multiplanes_available
;
283 draw
->have_fake_front
= 0;
284 draw
->first_init
= true;
286 draw
->cur_blit_source
= -1;
287 draw
->back_format
= __DRI_IMAGE_FORMAT_NONE
;
288 mtx_init(&draw
->mtx
, mtx_plain
);
289 cnd_init(&draw
->event_cnd
);
291 if (draw
->ext
->config
)
292 draw
->ext
->config
->configQueryi(draw
->dri_screen
,
293 "vblank_mode", &vblank_mode
);
295 switch (vblank_mode
) {
296 case DRI_CONF_VBLANK_NEVER
:
297 case DRI_CONF_VBLANK_DEF_INTERVAL_0
:
300 case DRI_CONF_VBLANK_DEF_INTERVAL_1
:
301 case DRI_CONF_VBLANK_ALWAYS_SYNC
:
306 draw
->swap_interval
= swap_interval
;
308 dri3_update_num_back(draw
);
310 /* Create a new drawable */
312 draw
->ext
->image_driver
->createNewDrawable(dri_screen
,
316 if (!draw
->dri_drawable
)
319 cookie
= xcb_get_geometry(draw
->conn
, draw
->drawable
);
320 reply
= xcb_get_geometry_reply(draw
->conn
, cookie
, &error
);
321 if (reply
== NULL
|| error
!= NULL
) {
322 draw
->ext
->core
->destroyDrawable(draw
->dri_drawable
);
326 draw
->width
= reply
->width
;
327 draw
->height
= reply
->height
;
328 draw
->depth
= reply
->depth
;
329 draw
->vtable
->set_drawable_size(draw
, draw
->width
, draw
->height
);
332 draw
->swap_method
= __DRI_ATTRIB_SWAP_UNDEFINED
;
333 if (draw
->ext
->core
->base
.version
>= 2) {
334 (void )draw
->ext
->core
->getConfigAttrib(dri_config
,
335 __DRI_ATTRIB_SWAP_METHOD
,
340 * Make sure server has the same swap interval we do for the new
343 loader_dri3_set_swap_interval(draw
, swap_interval
);
349 * Process one Present event
352 dri3_handle_present_event(struct loader_dri3_drawable
*draw
,
353 xcb_present_generic_event_t
*ge
)
355 switch (ge
->evtype
) {
356 case XCB_PRESENT_CONFIGURE_NOTIFY
: {
357 xcb_present_configure_notify_event_t
*ce
= (void *) ge
;
359 draw
->width
= ce
->width
;
360 draw
->height
= ce
->height
;
361 draw
->vtable
->set_drawable_size(draw
, draw
->width
, draw
->height
);
362 draw
->ext
->flush
->invalidate(draw
->dri_drawable
);
365 case XCB_PRESENT_COMPLETE_NOTIFY
: {
366 xcb_present_complete_notify_event_t
*ce
= (void *) ge
;
368 /* Compute the processed SBC number from the received 32-bit serial number
369 * merged with the upper 32-bits of the sent 64-bit serial number while
372 if (ce
->kind
== XCB_PRESENT_COMPLETE_KIND_PIXMAP
) {
373 draw
->recv_sbc
= (draw
->send_sbc
& 0xffffffff00000000LL
) | ce
->serial
;
374 if (draw
->recv_sbc
> draw
->send_sbc
)
375 draw
->recv_sbc
-= 0x100000000;
377 /* When moving from flip to copy, we assume that we can allocate in
378 * a more optimal way if we don't need to cater for the display
381 if (ce
->mode
== XCB_PRESENT_COMPLETE_MODE_COPY
&&
382 draw
->last_present_mode
== XCB_PRESENT_COMPLETE_MODE_FLIP
) {
383 for (int b
= 0; b
< ARRAY_SIZE(draw
->buffers
); b
++) {
384 if (draw
->buffers
[b
])
385 draw
->buffers
[b
]->reallocate
= true;
389 /* If the server tells us that our allocation is suboptimal, we
392 #ifdef HAVE_DRI3_MODIFIERS
393 if (ce
->mode
== XCB_PRESENT_COMPLETE_MODE_SUBOPTIMAL_COPY
&&
394 draw
->last_present_mode
!= ce
->mode
) {
395 for (int b
= 0; b
< ARRAY_SIZE(draw
->buffers
); b
++) {
396 if (draw
->buffers
[b
])
397 draw
->buffers
[b
]->reallocate
= true;
401 draw
->last_present_mode
= ce
->mode
;
403 if (draw
->vtable
->show_fps
)
404 draw
->vtable
->show_fps(draw
, ce
->ust
);
408 } else if (ce
->serial
== draw
->eid
) {
409 draw
->notify_ust
= ce
->ust
;
410 draw
->notify_msc
= ce
->msc
;
414 case XCB_PRESENT_EVENT_IDLE_NOTIFY
: {
415 xcb_present_idle_notify_event_t
*ie
= (void *) ge
;
418 for (b
= 0; b
< ARRAY_SIZE(draw
->buffers
); b
++) {
419 struct loader_dri3_buffer
*buf
= draw
->buffers
[b
];
421 if (buf
&& buf
->pixmap
== ie
->pixmap
)
431 dri3_wait_for_event_locked(struct loader_dri3_drawable
*draw
)
433 xcb_generic_event_t
*ev
;
434 xcb_present_generic_event_t
*ge
;
436 xcb_flush(draw
->conn
);
438 /* Only have one thread waiting for events at a time */
439 if (draw
->has_event_waiter
) {
440 cnd_wait(&draw
->event_cnd
, &draw
->mtx
);
441 /* Another thread has updated the protected info, so retest. */
444 draw
->has_event_waiter
= true;
445 /* Allow other threads access to the drawable while we're waiting. */
446 mtx_unlock(&draw
->mtx
);
447 ev
= xcb_wait_for_special_event(draw
->conn
, draw
->special_event
);
448 mtx_lock(&draw
->mtx
);
449 draw
->has_event_waiter
= false;
450 cnd_broadcast(&draw
->event_cnd
);
455 dri3_handle_present_event(draw
, ge
);
459 /** loader_dri3_wait_for_msc
461 * Get the X server to send an event when the target msc/divisor/remainder is
465 loader_dri3_wait_for_msc(struct loader_dri3_drawable
*draw
,
467 int64_t divisor
, int64_t remainder
,
468 int64_t *ust
, int64_t *msc
, int64_t *sbc
)
470 xcb_void_cookie_t cookie
= xcb_present_notify_msc(draw
->conn
,
476 xcb_generic_event_t
*ev
;
477 unsigned full_sequence
;
479 mtx_lock(&draw
->mtx
);
480 xcb_flush(draw
->conn
);
482 /* Wait for the event */
484 ev
= xcb_wait_for_special_event(draw
->conn
, draw
->special_event
);
486 mtx_unlock(&draw
->mtx
);
490 full_sequence
= ev
->full_sequence
;
491 dri3_handle_present_event(draw
, (void *) ev
);
492 } while (full_sequence
!= cookie
.sequence
|| draw
->notify_msc
< target_msc
);
494 *ust
= draw
->notify_ust
;
495 *msc
= draw
->notify_msc
;
496 *sbc
= draw
->recv_sbc
;
497 mtx_unlock(&draw
->mtx
);
502 /** loader_dri3_wait_for_sbc
504 * Wait for the completed swap buffer count to reach the specified
505 * target. Presumably the application knows that this will be reached with
506 * outstanding complete events, or we're going to be here awhile.
509 loader_dri3_wait_for_sbc(struct loader_dri3_drawable
*draw
,
510 int64_t target_sbc
, int64_t *ust
,
511 int64_t *msc
, int64_t *sbc
)
513 /* From the GLX_OML_sync_control spec:
515 * "If <target_sbc> = 0, the function will block until all previous
516 * swaps requested with glXSwapBuffersMscOML for that window have
519 mtx_lock(&draw
->mtx
);
521 target_sbc
= draw
->send_sbc
;
523 while (draw
->recv_sbc
< target_sbc
) {
524 if (!dri3_wait_for_event_locked(draw
)) {
525 mtx_unlock(&draw
->mtx
);
532 *sbc
= draw
->recv_sbc
;
533 mtx_unlock(&draw
->mtx
);
537 /** loader_dri3_find_back
539 * Find an idle back buffer. If there isn't one, then
540 * wait for a present idle notify event from the X server
543 dri3_find_back(struct loader_dri3_drawable
*draw
)
548 mtx_lock(&draw
->mtx
);
549 /* Increase the likelyhood of reusing current buffer */
550 dri3_flush_present_events(draw
);
552 /* Check whether we need to reuse the current back buffer as new back.
553 * In that case, wait until it's not busy anymore.
555 num_to_consider
= draw
->num_back
;
556 if (!loader_dri3_have_image_blit(draw
) && draw
->cur_blit_source
!= -1) {
558 draw
->cur_blit_source
= -1;
562 for (b
= 0; b
< num_to_consider
; b
++) {
563 int id
= LOADER_DRI3_BACK_ID((b
+ draw
->cur_back
) % draw
->num_back
);
564 struct loader_dri3_buffer
*buffer
= draw
->buffers
[id
];
566 if (!buffer
|| !buffer
->busy
) {
568 mtx_unlock(&draw
->mtx
);
572 if (!dri3_wait_for_event_locked(draw
)) {
573 mtx_unlock(&draw
->mtx
);
579 static xcb_gcontext_t
580 dri3_drawable_gc(struct loader_dri3_drawable
*draw
)
584 xcb_create_gc(draw
->conn
,
585 (draw
->gc
= xcb_generate_id(draw
->conn
)),
587 XCB_GC_GRAPHICS_EXPOSURES
,
594 static struct loader_dri3_buffer
*
595 dri3_back_buffer(struct loader_dri3_drawable
*draw
)
597 return draw
->buffers
[LOADER_DRI3_BACK_ID(draw
->cur_back
)];
600 static struct loader_dri3_buffer
*
601 dri3_fake_front_buffer(struct loader_dri3_drawable
*draw
)
603 return draw
->buffers
[LOADER_DRI3_FRONT_ID
];
607 dri3_copy_area(xcb_connection_t
*c
,
608 xcb_drawable_t src_drawable
,
609 xcb_drawable_t dst_drawable
,
618 xcb_void_cookie_t cookie
;
620 cookie
= xcb_copy_area_checked(c
,
630 xcb_discard_reply(c
, cookie
.sequence
);
634 * Asks the driver to flush any queued work necessary for serializing with the
635 * X command stream, and optionally the slightly more strict requirement of
636 * glFlush() equivalence (which would require flushing even if nothing had
637 * been drawn to a window system framebuffer, for example).
640 loader_dri3_flush(struct loader_dri3_drawable
*draw
,
642 enum __DRI2throttleReason throttle_reason
)
644 /* NEED TO CHECK WHETHER CONTEXT IS NULL */
645 __DRIcontext
*dri_context
= draw
->vtable
->get_dri_context(draw
);
648 draw
->ext
->flush
->flush_with_flags(dri_context
, draw
->dri_drawable
,
649 flags
, throttle_reason
);
654 loader_dri3_copy_sub_buffer(struct loader_dri3_drawable
*draw
,
656 int width
, int height
,
659 struct loader_dri3_buffer
*back
;
660 unsigned flags
= __DRI2_FLUSH_DRAWABLE
;
662 /* Check we have the right attachments */
663 if (!draw
->have_back
|| draw
->is_pixmap
)
667 flags
|= __DRI2_FLUSH_CONTEXT
;
668 loader_dri3_flush(draw
, flags
, __DRI2_THROTTLE_SWAPBUFFER
);
670 back
= dri3_find_back_alloc(draw
);
674 y
= draw
->height
- y
- height
;
676 if (draw
->is_different_gpu
) {
677 /* Update the linear buffer part of the back buffer
678 * for the dri3_copy_area operation
680 (void) loader_dri3_blit_image(draw
,
683 0, 0, back
->width
, back
->height
,
684 0, 0, __BLIT_FLAG_FLUSH
);
687 loader_dri3_swapbuffer_barrier(draw
);
688 dri3_fence_reset(draw
->conn
, back
);
689 dri3_copy_area(draw
->conn
,
692 dri3_drawable_gc(draw
),
693 x
, y
, x
, y
, width
, height
);
694 dri3_fence_trigger(draw
->conn
, back
);
695 /* Refresh the fake front (if present) after we just damaged the real
698 if (draw
->have_fake_front
&&
699 !loader_dri3_blit_image(draw
,
700 dri3_fake_front_buffer(draw
)->image
,
703 x
, y
, __BLIT_FLAG_FLUSH
) &&
704 !draw
->is_different_gpu
) {
705 dri3_fence_reset(draw
->conn
, dri3_fake_front_buffer(draw
));
706 dri3_copy_area(draw
->conn
,
708 dri3_fake_front_buffer(draw
)->pixmap
,
709 dri3_drawable_gc(draw
),
710 x
, y
, x
, y
, width
, height
);
711 dri3_fence_trigger(draw
->conn
, dri3_fake_front_buffer(draw
));
712 dri3_fence_await(draw
->conn
, NULL
, dri3_fake_front_buffer(draw
));
714 dri3_fence_await(draw
->conn
, draw
, back
);
718 loader_dri3_copy_drawable(struct loader_dri3_drawable
*draw
,
722 loader_dri3_flush(draw
, __DRI2_FLUSH_DRAWABLE
, 0);
724 dri3_fence_reset(draw
->conn
, dri3_fake_front_buffer(draw
));
725 dri3_copy_area(draw
->conn
,
727 dri3_drawable_gc(draw
),
728 0, 0, 0, 0, draw
->width
, draw
->height
);
729 dri3_fence_trigger(draw
->conn
, dri3_fake_front_buffer(draw
));
730 dri3_fence_await(draw
->conn
, draw
, dri3_fake_front_buffer(draw
));
734 loader_dri3_wait_x(struct loader_dri3_drawable
*draw
)
736 struct loader_dri3_buffer
*front
;
738 if (draw
== NULL
|| !draw
->have_fake_front
)
741 front
= dri3_fake_front_buffer(draw
);
743 loader_dri3_copy_drawable(draw
, front
->pixmap
, draw
->drawable
);
745 /* In the psc->is_different_gpu case, the linear buffer has been updated,
746 * but not yet the tiled buffer.
747 * Copy back to the tiled buffer we use for rendering.
748 * Note that we don't need flushing.
750 if (draw
->is_different_gpu
)
751 (void) loader_dri3_blit_image(draw
,
753 front
->linear_buffer
,
754 0, 0, front
->width
, front
->height
,
759 loader_dri3_wait_gl(struct loader_dri3_drawable
*draw
)
761 struct loader_dri3_buffer
*front
;
763 if (draw
== NULL
|| !draw
->have_fake_front
)
766 front
= dri3_fake_front_buffer(draw
);
768 /* In the psc->is_different_gpu case, we update the linear_buffer
769 * before updating the real front.
771 if (draw
->is_different_gpu
)
772 (void) loader_dri3_blit_image(draw
,
773 front
->linear_buffer
,
775 0, 0, front
->width
, front
->height
,
776 0, 0, __BLIT_FLAG_FLUSH
);
777 loader_dri3_swapbuffer_barrier(draw
);
778 loader_dri3_copy_drawable(draw
, draw
->drawable
, front
->pixmap
);
781 /** dri3_flush_present_events
783 * Process any present events that have been received from the X server
786 dri3_flush_present_events(struct loader_dri3_drawable
*draw
)
788 /* Check to see if any configuration changes have occurred
789 * since we were last invoked
791 if (draw
->has_event_waiter
)
794 if (draw
->special_event
) {
795 xcb_generic_event_t
*ev
;
797 while ((ev
= xcb_poll_for_special_event(draw
->conn
,
798 draw
->special_event
)) != NULL
) {
799 xcb_present_generic_event_t
*ge
= (void *) ev
;
800 dri3_handle_present_event(draw
, ge
);
805 /** loader_dri3_swap_buffers_msc
807 * Make the current back buffer visible using the present extension
810 loader_dri3_swap_buffers_msc(struct loader_dri3_drawable
*draw
,
811 int64_t target_msc
, int64_t divisor
,
812 int64_t remainder
, unsigned flush_flags
,
815 struct loader_dri3_buffer
*back
;
817 uint32_t options
= XCB_PRESENT_OPTION_NONE
;
819 draw
->vtable
->flush_drawable(draw
, flush_flags
);
821 back
= dri3_find_back_alloc(draw
);
823 mtx_lock(&draw
->mtx
);
824 if (draw
->is_different_gpu
&& back
) {
825 /* Update the linear buffer before presenting the pixmap */
826 (void) loader_dri3_blit_image(draw
,
829 0, 0, back
->width
, back
->height
,
830 0, 0, __BLIT_FLAG_FLUSH
);
833 /* If we need to preload the new back buffer, remember the source.
834 * The force_copy parameter is used by EGL to attempt to preserve
835 * the back buffer across a call to this function.
837 if (draw
->swap_method
!= __DRI_ATTRIB_SWAP_UNDEFINED
|| force_copy
)
838 draw
->cur_blit_source
= LOADER_DRI3_BACK_ID(draw
->cur_back
);
840 /* Exchange the back and fake front. Even though the server knows about these
841 * buffers, it has no notion of back and fake front.
843 if (back
&& draw
->have_fake_front
) {
844 struct loader_dri3_buffer
*tmp
;
846 tmp
= dri3_fake_front_buffer(draw
);
847 draw
->buffers
[LOADER_DRI3_FRONT_ID
] = back
;
848 draw
->buffers
[LOADER_DRI3_BACK_ID(draw
->cur_back
)] = tmp
;
850 if (draw
->swap_method
== __DRI_ATTRIB_SWAP_COPY
|| force_copy
)
851 draw
->cur_blit_source
= LOADER_DRI3_FRONT_ID
;
854 dri3_flush_present_events(draw
);
856 if (back
&& !draw
->is_pixmap
) {
857 dri3_fence_reset(draw
->conn
, back
);
859 /* Compute when we want the frame shown by taking the last known
860 * successful MSC and adding in a swap interval for each outstanding swap
861 * request. target_msc=divisor=remainder=0 means "Use glXSwapBuffers()
865 if (target_msc
== 0 && divisor
== 0 && remainder
== 0)
866 target_msc
= draw
->msc
+ draw
->swap_interval
*
867 (draw
->send_sbc
- draw
->recv_sbc
);
868 else if (divisor
== 0 && remainder
> 0) {
869 /* From the GLX_OML_sync_control spec:
870 * "If <divisor> = 0, the swap will occur when MSC becomes
871 * greater than or equal to <target_msc>."
873 * Note that there's no mention of the remainder. The Present
874 * extension throws BadValue for remainder != 0 with divisor == 0, so
875 * just drop the passed in value.
880 /* From the GLX_EXT_swap_control spec
881 * and the EGL 1.4 spec (page 53):
883 * "If <interval> is set to a value of 0, buffer swaps are not
884 * synchronized to a video frame."
886 * Implementation note: It is possible to enable triple buffering
887 * behaviour by not using XCB_PRESENT_OPTION_ASYNC, but this should not be
890 if (draw
->swap_interval
== 0)
891 options
|= XCB_PRESENT_OPTION_ASYNC
;
893 /* If we need to populate the new back, but need to reuse the back
894 * buffer slot due to lack of local blit capabilities, make sure
895 * the server doesn't flip and we deadlock.
897 if (!loader_dri3_have_image_blit(draw
) && draw
->cur_blit_source
!= -1)
898 options
|= XCB_PRESENT_OPTION_COPY
;
899 #ifdef HAVE_DRI3_MODIFIERS
900 if (draw
->multiplanes_available
)
901 options
|= XCB_PRESENT_OPTION_SUBOPTIMAL
;
904 back
->last_swap
= draw
->send_sbc
;
905 xcb_present_pixmap(draw
->conn
,
908 (uint32_t) draw
->send_sbc
,
913 None
, /* target_crtc */
920 ret
= (int64_t) draw
->send_sbc
;
922 /* Schedule a server-side back-preserving blit if necessary.
923 * This happens iff all conditions below are satisfied:
924 * a) We have a fake front,
925 * b) We need to preserve the back buffer,
926 * c) We don't have local blit capabilities.
928 if (!loader_dri3_have_image_blit(draw
) && draw
->cur_blit_source
!= -1 &&
929 draw
->cur_blit_source
!= LOADER_DRI3_BACK_ID(draw
->cur_back
)) {
930 struct loader_dri3_buffer
*new_back
= dri3_back_buffer(draw
);
931 struct loader_dri3_buffer
*src
= draw
->buffers
[draw
->cur_blit_source
];
933 dri3_fence_reset(draw
->conn
, new_back
);
934 dri3_copy_area(draw
->conn
, src
->pixmap
,
936 dri3_drawable_gc(draw
),
937 0, 0, 0, 0, draw
->width
, draw
->height
);
938 dri3_fence_trigger(draw
->conn
, new_back
);
939 new_back
->last_swap
= src
->last_swap
;
942 xcb_flush(draw
->conn
);
946 mtx_unlock(&draw
->mtx
);
948 draw
->ext
->flush
->invalidate(draw
->dri_drawable
);
954 loader_dri3_query_buffer_age(struct loader_dri3_drawable
*draw
)
956 struct loader_dri3_buffer
*back
= dri3_find_back_alloc(draw
);
959 mtx_lock(&draw
->mtx
);
960 ret
= (!back
|| back
->last_swap
== 0) ? 0 :
961 draw
->send_sbc
- back
->last_swap
+ 1;
962 mtx_unlock(&draw
->mtx
);
969 * Wrapper around xcb_dri3_open
972 loader_dri3_open(xcb_connection_t
*conn
,
976 xcb_dri3_open_cookie_t cookie
;
977 xcb_dri3_open_reply_t
*reply
;
980 cookie
= xcb_dri3_open(conn
,
984 reply
= xcb_dri3_open_reply(conn
, cookie
, NULL
);
988 if (reply
->nfd
!= 1) {
993 fd
= xcb_dri3_open_reply_fds(conn
, reply
)[0];
995 fcntl(fd
, F_SETFD
, fcntl(fd
, F_GETFD
) | FD_CLOEXEC
);
1001 dri3_cpp_for_format(uint32_t format
) {
1003 case __DRI_IMAGE_FORMAT_R8
:
1005 case __DRI_IMAGE_FORMAT_RGB565
:
1006 case __DRI_IMAGE_FORMAT_GR88
:
1008 case __DRI_IMAGE_FORMAT_XRGB8888
:
1009 case __DRI_IMAGE_FORMAT_ARGB8888
:
1010 case __DRI_IMAGE_FORMAT_ABGR8888
:
1011 case __DRI_IMAGE_FORMAT_XBGR8888
:
1012 case __DRI_IMAGE_FORMAT_XRGB2101010
:
1013 case __DRI_IMAGE_FORMAT_ARGB2101010
:
1014 case __DRI_IMAGE_FORMAT_XBGR2101010
:
1015 case __DRI_IMAGE_FORMAT_ABGR2101010
:
1016 case __DRI_IMAGE_FORMAT_SARGB8
:
1017 case __DRI_IMAGE_FORMAT_SABGR8
:
1019 case __DRI_IMAGE_FORMAT_NONE
:
1025 /* the DRIimage createImage function takes __DRI_IMAGE_FORMAT codes, while
1026 * the createImageFromFds call takes __DRI_IMAGE_FOURCC codes. To avoid
1027 * complete confusion, just deal in __DRI_IMAGE_FORMAT codes for now and
1028 * translate to __DRI_IMAGE_FOURCC codes in the call to createImageFromFds
1031 image_format_to_fourcc(int format
)
1034 /* Convert from __DRI_IMAGE_FORMAT to __DRI_IMAGE_FOURCC (sigh) */
1036 case __DRI_IMAGE_FORMAT_SARGB8
: return __DRI_IMAGE_FOURCC_SARGB8888
;
1037 case __DRI_IMAGE_FORMAT_SABGR8
: return __DRI_IMAGE_FOURCC_SABGR8888
;
1038 case __DRI_IMAGE_FORMAT_RGB565
: return __DRI_IMAGE_FOURCC_RGB565
;
1039 case __DRI_IMAGE_FORMAT_XRGB8888
: return __DRI_IMAGE_FOURCC_XRGB8888
;
1040 case __DRI_IMAGE_FORMAT_ARGB8888
: return __DRI_IMAGE_FOURCC_ARGB8888
;
1041 case __DRI_IMAGE_FORMAT_ABGR8888
: return __DRI_IMAGE_FOURCC_ABGR8888
;
1042 case __DRI_IMAGE_FORMAT_XBGR8888
: return __DRI_IMAGE_FOURCC_XBGR8888
;
1043 case __DRI_IMAGE_FORMAT_XRGB2101010
: return __DRI_IMAGE_FOURCC_XRGB2101010
;
1044 case __DRI_IMAGE_FORMAT_ARGB2101010
: return __DRI_IMAGE_FOURCC_ARGB2101010
;
1045 case __DRI_IMAGE_FORMAT_XBGR2101010
: return __DRI_IMAGE_FOURCC_XBGR2101010
;
1046 case __DRI_IMAGE_FORMAT_ABGR2101010
: return __DRI_IMAGE_FOURCC_ABGR2101010
;
1051 #ifdef HAVE_DRI3_MODIFIERS
1053 has_supported_modifier(struct loader_dri3_drawable
*draw
, unsigned int format
,
1054 uint64_t *modifiers
, uint32_t count
)
1056 uint64_t *supported_modifiers
;
1057 int32_t supported_modifiers_count
;
1061 if (!draw
->ext
->image
->queryDmaBufModifiers(draw
->dri_screen
,
1062 format
, 0, NULL
, NULL
,
1063 &supported_modifiers_count
) ||
1064 supported_modifiers_count
== 0)
1067 supported_modifiers
= malloc(supported_modifiers_count
* sizeof(uint64_t));
1068 if (!supported_modifiers
)
1071 draw
->ext
->image
->queryDmaBufModifiers(draw
->dri_screen
, format
,
1072 supported_modifiers_count
,
1073 supported_modifiers
, NULL
,
1074 &supported_modifiers_count
);
1076 for (i
= 0; !found
&& i
< supported_modifiers_count
; i
++) {
1077 for (j
= 0; !found
&& j
< count
; j
++) {
1078 if (supported_modifiers
[i
] == modifiers
[j
])
1083 free(supported_modifiers
);
1088 /** loader_dri3_alloc_render_buffer
1090 * Use the driver createImage function to construct a __DRIimage, then
1091 * get a file descriptor for that and create an X pixmap from that
1093 * Allocate an xshmfence for synchronization
1095 static struct loader_dri3_buffer
*
1096 dri3_alloc_render_buffer(struct loader_dri3_drawable
*draw
, unsigned int format
,
1097 int width
, int height
, int depth
)
1099 struct loader_dri3_buffer
*buffer
;
1100 __DRIimage
*pixmap_buffer
;
1101 xcb_pixmap_t pixmap
;
1102 xcb_sync_fence_t sync_fence
;
1103 struct xshmfence
*shm_fence
;
1104 int buffer_fds
[4], fence_fd
;
1109 /* Create an xshmfence object and
1110 * prepare to send that to the X server
1113 fence_fd
= xshmfence_alloc_shm();
1117 shm_fence
= xshmfence_map_shm(fence_fd
);
1118 if (shm_fence
== NULL
)
1121 /* Allocate the image from the driver
1123 buffer
= calloc(1, sizeof *buffer
);
1127 buffer
->cpp
= dri3_cpp_for_format(format
);
1131 if (!draw
->is_different_gpu
) {
1132 #ifdef HAVE_DRI3_MODIFIERS
1133 if (draw
->multiplanes_available
&&
1134 draw
->ext
->image
->base
.version
>= 15 &&
1135 draw
->ext
->image
->queryDmaBufModifiers
&&
1136 draw
->ext
->image
->createImageWithModifiers
) {
1137 xcb_dri3_get_supported_modifiers_cookie_t mod_cookie
;
1138 xcb_dri3_get_supported_modifiers_reply_t
*mod_reply
;
1139 xcb_generic_error_t
*error
= NULL
;
1140 uint64_t *modifiers
= NULL
;
1143 mod_cookie
= xcb_dri3_get_supported_modifiers(draw
->conn
,
1145 depth
, buffer
->cpp
* 8);
1146 mod_reply
= xcb_dri3_get_supported_modifiers_reply(draw
->conn
,
1152 if (mod_reply
->num_window_modifiers
) {
1153 count
= mod_reply
->num_window_modifiers
;
1154 modifiers
= malloc(count
* sizeof(uint64_t));
1161 xcb_dri3_get_supported_modifiers_window_modifiers(mod_reply
),
1162 count
* sizeof(uint64_t));
1164 if (!has_supported_modifier(draw
, image_format_to_fourcc(format
),
1165 modifiers
, count
)) {
1172 if (mod_reply
->num_screen_modifiers
&& modifiers
== NULL
) {
1173 count
= mod_reply
->num_screen_modifiers
;
1174 modifiers
= malloc(count
* sizeof(uint64_t));
1182 xcb_dri3_get_supported_modifiers_screen_modifiers(mod_reply
),
1183 count
* sizeof(uint64_t));
1188 buffer
->image
= draw
->ext
->image
->createImageWithModifiers(draw
->dri_screen
,
1198 buffer
->image
= draw
->ext
->image
->createImage(draw
->dri_screen
,
1201 __DRI_IMAGE_USE_SHARE
|
1202 __DRI_IMAGE_USE_SCANOUT
|
1203 __DRI_IMAGE_USE_BACKBUFFER
,
1206 pixmap_buffer
= buffer
->image
;
1211 buffer
->image
= draw
->ext
->image
->createImage(draw
->dri_screen
,
1220 buffer
->linear_buffer
=
1221 draw
->ext
->image
->createImage(draw
->dri_screen
,
1222 width
, height
, format
,
1223 __DRI_IMAGE_USE_SHARE
|
1224 __DRI_IMAGE_USE_LINEAR
|
1225 __DRI_IMAGE_USE_BACKBUFFER
,
1227 pixmap_buffer
= buffer
->linear_buffer
;
1229 if (!buffer
->linear_buffer
)
1230 goto no_linear_buffer
;
1233 /* X want some information about the planes, so ask the image for it
1235 if (!draw
->ext
->image
->queryImage(pixmap_buffer
, __DRI_IMAGE_ATTRIB_NUM_PLANES
,
1239 for (i
= 0; i
< num_planes
; i
++) {
1240 __DRIimage
*image
= draw
->ext
->image
->fromPlanar(pixmap_buffer
, i
, NULL
);
1244 image
= pixmap_buffer
;
1247 ret
= draw
->ext
->image
->queryImage(image
, __DRI_IMAGE_ATTRIB_FD
,
1249 ret
&= draw
->ext
->image
->queryImage(image
, __DRI_IMAGE_ATTRIB_STRIDE
,
1250 &buffer
->strides
[i
]);
1251 ret
&= draw
->ext
->image
->queryImage(image
, __DRI_IMAGE_ATTRIB_OFFSET
,
1252 &buffer
->offsets
[i
]);
1253 if (image
!= pixmap_buffer
)
1254 draw
->ext
->image
->destroyImage(image
);
1257 goto no_buffer_attrib
;
1260 ret
= draw
->ext
->image
->queryImage(pixmap_buffer
,
1261 __DRI_IMAGE_ATTRIB_MODIFIER_UPPER
, &mod
);
1262 buffer
->modifier
= (uint64_t) mod
<< 32;
1263 ret
&= draw
->ext
->image
->queryImage(pixmap_buffer
,
1264 __DRI_IMAGE_ATTRIB_MODIFIER_LOWER
, &mod
);
1265 buffer
->modifier
|= (uint64_t)(mod
& 0xffffffff);
1268 buffer
->modifier
= DRM_FORMAT_MOD_INVALID
;
1270 pixmap
= xcb_generate_id(draw
->conn
);
1271 #ifdef HAVE_DRI3_MODIFIERS
1272 if (draw
->multiplanes_available
&&
1273 buffer
->modifier
!= DRM_FORMAT_MOD_INVALID
) {
1274 xcb_dri3_pixmap_from_buffers(draw
->conn
,
1279 buffer
->strides
[0], buffer
->offsets
[0],
1280 buffer
->strides
[1], buffer
->offsets
[1],
1281 buffer
->strides
[2], buffer
->offsets
[2],
1282 buffer
->strides
[3], buffer
->offsets
[3],
1283 depth
, buffer
->cpp
* 8,
1289 xcb_dri3_pixmap_from_buffer(draw
->conn
,
1293 width
, height
, buffer
->strides
[0],
1294 depth
, buffer
->cpp
* 8,
1298 xcb_dri3_fence_from_fd(draw
->conn
,
1300 (sync_fence
= xcb_generate_id(draw
->conn
)),
1304 buffer
->pixmap
= pixmap
;
1305 buffer
->own_pixmap
= true;
1306 buffer
->sync_fence
= sync_fence
;
1307 buffer
->shm_fence
= shm_fence
;
1308 buffer
->width
= width
;
1309 buffer
->height
= height
;
1311 /* Mark the buffer as idle
1313 dri3_fence_set(buffer
);
1319 close(buffer_fds
[i
]);
1321 draw
->ext
->image
->destroyImage(pixmap_buffer
);
1323 if (draw
->is_different_gpu
)
1324 draw
->ext
->image
->destroyImage(buffer
->image
);
1328 xshmfence_unmap_shm(shm_fence
);
1334 /** loader_dri3_update_drawable
1336 * Called the first time we use the drawable and then
1337 * after we receive present configure notify events to
1338 * track the geometry of the drawable
1341 dri3_update_drawable(__DRIdrawable
*driDrawable
,
1342 struct loader_dri3_drawable
*draw
)
1344 mtx_lock(&draw
->mtx
);
1345 if (draw
->first_init
) {
1346 xcb_get_geometry_cookie_t geom_cookie
;
1347 xcb_get_geometry_reply_t
*geom_reply
;
1348 xcb_void_cookie_t cookie
;
1349 xcb_generic_error_t
*error
;
1350 xcb_present_query_capabilities_cookie_t present_capabilities_cookie
;
1351 xcb_present_query_capabilities_reply_t
*present_capabilities_reply
;
1353 draw
->first_init
= false;
1355 /* Try to select for input on the window.
1357 * If the drawable is a window, this will get our events
1360 * Otherwise, we'll get a BadWindow error back from this request which
1361 * will let us know that the drawable is a pixmap instead.
1364 draw
->eid
= xcb_generate_id(draw
->conn
);
1366 xcb_present_select_input_checked(draw
->conn
, draw
->eid
, draw
->drawable
,
1367 XCB_PRESENT_EVENT_MASK_CONFIGURE_NOTIFY
|
1368 XCB_PRESENT_EVENT_MASK_COMPLETE_NOTIFY
|
1369 XCB_PRESENT_EVENT_MASK_IDLE_NOTIFY
);
1371 present_capabilities_cookie
=
1372 xcb_present_query_capabilities(draw
->conn
, draw
->drawable
);
1374 /* Create an XCB event queue to hold present events outside of the usual
1375 * application event queue
1377 draw
->special_event
= xcb_register_for_special_xge(draw
->conn
,
1381 geom_cookie
= xcb_get_geometry(draw
->conn
, draw
->drawable
);
1383 geom_reply
= xcb_get_geometry_reply(draw
->conn
, geom_cookie
, NULL
);
1386 mtx_unlock(&draw
->mtx
);
1390 draw
->width
= geom_reply
->width
;
1391 draw
->height
= geom_reply
->height
;
1392 draw
->depth
= geom_reply
->depth
;
1393 draw
->vtable
->set_drawable_size(draw
, draw
->width
, draw
->height
);
1397 draw
->is_pixmap
= false;
1399 /* Check to see if our select input call failed. If it failed with a
1400 * BadWindow error, then assume the drawable is a pixmap. Destroy the
1401 * special event queue created above and mark the drawable as a pixmap
1404 error
= xcb_request_check(draw
->conn
, cookie
);
1406 present_capabilities_reply
=
1407 xcb_present_query_capabilities_reply(draw
->conn
,
1408 present_capabilities_cookie
,
1411 if (present_capabilities_reply
) {
1412 draw
->present_capabilities
= present_capabilities_reply
->capabilities
;
1413 free(present_capabilities_reply
);
1415 draw
->present_capabilities
= 0;
1418 if (error
->error_code
!= BadWindow
) {
1420 mtx_unlock(&draw
->mtx
);
1423 draw
->is_pixmap
= true;
1424 xcb_unregister_for_special_event(draw
->conn
, draw
->special_event
);
1425 draw
->special_event
= NULL
;
1428 dri3_flush_present_events(draw
);
1429 mtx_unlock(&draw
->mtx
);
1434 loader_dri3_create_image(xcb_connection_t
*c
,
1435 xcb_dri3_buffer_from_pixmap_reply_t
*bp_reply
,
1436 unsigned int format
,
1437 __DRIscreen
*dri_screen
,
1438 const __DRIimageExtension
*image
,
1439 void *loaderPrivate
)
1442 __DRIimage
*image_planar
, *ret
;
1445 /* Get an FD for the pixmap object
1447 fds
= xcb_dri3_buffer_from_pixmap_reply_fds(c
, bp_reply
);
1449 stride
= bp_reply
->stride
;
1452 /* createImageFromFds creates a wrapper __DRIimage structure which
1453 * can deal with multiple planes for things like Yuv images. So, once
1454 * we've gotten the planar wrapper, pull the single plane out of it and
1455 * discard the wrapper.
1457 image_planar
= image
->createImageFromFds(dri_screen
,
1460 image_format_to_fourcc(format
),
1462 &stride
, &offset
, loaderPrivate
);
1467 ret
= image
->fromPlanar(image_planar
, 0, loaderPrivate
);
1472 image
->destroyImage(image_planar
);
1477 #ifdef HAVE_DRI3_MODIFIERS
1479 loader_dri3_create_image_from_buffers(xcb_connection_t
*c
,
1480 xcb_dri3_buffers_from_pixmap_reply_t
*bp_reply
,
1481 unsigned int format
,
1482 __DRIscreen
*dri_screen
,
1483 const __DRIimageExtension
*image
,
1484 void *loaderPrivate
)
1488 uint32_t *strides_in
, *offsets_in
;
1489 int strides
[4], offsets
[4];
1493 if (bp_reply
->nfd
> 4)
1496 fds
= xcb_dri3_buffers_from_pixmap_reply_fds(c
, bp_reply
);
1497 strides_in
= xcb_dri3_buffers_from_pixmap_strides(bp_reply
);
1498 offsets_in
= xcb_dri3_buffers_from_pixmap_offsets(bp_reply
);
1499 for (i
= 0; i
< bp_reply
->nfd
; i
++) {
1500 strides
[i
] = strides_in
[i
];
1501 offsets
[i
] = offsets_in
[i
];
1504 ret
= image
->createImageFromDmaBufs2(dri_screen
,
1507 image_format_to_fourcc(format
),
1511 0, 0, 0, 0, /* UNDEFINED */
1512 &error
, loaderPrivate
);
1514 for (i
= 0; i
< bp_reply
->nfd
; i
++)
1521 /** dri3_get_pixmap_buffer
1523 * Get the DRM object for a pixmap from the X server and
1524 * wrap that with a __DRIimage structure using createImageFromFds
1526 static struct loader_dri3_buffer
*
1527 dri3_get_pixmap_buffer(__DRIdrawable
*driDrawable
, unsigned int format
,
1528 enum loader_dri3_buffer_type buffer_type
,
1529 struct loader_dri3_drawable
*draw
)
1531 int buf_id
= loader_dri3_pixmap_buf_id(buffer_type
);
1532 struct loader_dri3_buffer
*buffer
= draw
->buffers
[buf_id
];
1533 xcb_drawable_t pixmap
;
1534 xcb_sync_fence_t sync_fence
;
1535 struct xshmfence
*shm_fence
;
1539 __DRIscreen
*cur_screen
;
1544 pixmap
= draw
->drawable
;
1546 buffer
= calloc(1, sizeof *buffer
);
1550 fence_fd
= xshmfence_alloc_shm();
1553 shm_fence
= xshmfence_map_shm(fence_fd
);
1554 if (shm_fence
== NULL
) {
1559 /* Get the currently-bound screen or revert to using the drawable's screen if
1560 * no contexts are currently bound. The latter case is at least necessary for
1561 * obs-studio, when using Window Capture (Xcomposite) as a Source.
1563 cur_screen
= draw
->vtable
->get_dri_screen();
1565 cur_screen
= draw
->dri_screen
;
1568 xcb_dri3_fence_from_fd(draw
->conn
,
1570 (sync_fence
= xcb_generate_id(draw
->conn
)),
1573 #ifdef HAVE_DRI3_MODIFIERS
1574 if (draw
->multiplanes_available
&&
1575 draw
->ext
->image
->base
.version
>= 15 &&
1576 draw
->ext
->image
->createImageFromDmaBufs2
) {
1577 xcb_dri3_buffers_from_pixmap_cookie_t bps_cookie
;
1578 xcb_dri3_buffers_from_pixmap_reply_t
*bps_reply
;
1580 bps_cookie
= xcb_dri3_buffers_from_pixmap(draw
->conn
, pixmap
);
1581 bps_reply
= xcb_dri3_buffers_from_pixmap_reply(draw
->conn
, bps_cookie
,
1586 loader_dri3_create_image_from_buffers(draw
->conn
, bps_reply
, format
,
1587 cur_screen
, draw
->ext
->image
,
1589 width
= bps_reply
->width
;
1590 height
= bps_reply
->height
;
1595 xcb_dri3_buffer_from_pixmap_cookie_t bp_cookie
;
1596 xcb_dri3_buffer_from_pixmap_reply_t
*bp_reply
;
1598 bp_cookie
= xcb_dri3_buffer_from_pixmap(draw
->conn
, pixmap
);
1599 bp_reply
= xcb_dri3_buffer_from_pixmap_reply(draw
->conn
, bp_cookie
, NULL
);
1603 buffer
->image
= loader_dri3_create_image(draw
->conn
, bp_reply
, format
,
1604 cur_screen
, draw
->ext
->image
,
1606 width
= bp_reply
->width
;
1607 height
= bp_reply
->height
;
1614 buffer
->pixmap
= pixmap
;
1615 buffer
->own_pixmap
= false;
1616 buffer
->width
= width
;
1617 buffer
->height
= height
;
1618 buffer
->shm_fence
= shm_fence
;
1619 buffer
->sync_fence
= sync_fence
;
1621 draw
->buffers
[buf_id
] = buffer
;
1626 xcb_sync_destroy_fence(draw
->conn
, sync_fence
);
1627 xshmfence_unmap_shm(shm_fence
);
1636 * Find a front or back buffer, allocating new ones as necessary
1638 static struct loader_dri3_buffer
*
1639 dri3_get_buffer(__DRIdrawable
*driDrawable
,
1640 unsigned int format
,
1641 enum loader_dri3_buffer_type buffer_type
,
1642 struct loader_dri3_drawable
*draw
)
1644 struct loader_dri3_buffer
*buffer
;
1647 if (buffer_type
== loader_dri3_buffer_back
) {
1648 draw
->back_format
= format
;
1650 buf_id
= dri3_find_back(draw
);
1655 buf_id
= LOADER_DRI3_FRONT_ID
;
1658 buffer
= draw
->buffers
[buf_id
];
1660 /* Allocate a new buffer if there isn't an old one, if that
1661 * old one is the wrong size, or if it's suboptimal
1663 if (!buffer
|| buffer
->width
!= draw
->width
||
1664 buffer
->height
!= draw
->height
||
1665 buffer
->reallocate
) {
1666 struct loader_dri3_buffer
*new_buffer
;
1668 /* Allocate the new buffers
1670 new_buffer
= dri3_alloc_render_buffer(draw
,
1678 /* When resizing, copy the contents of the old buffer, waiting for that
1679 * copy to complete using our fences before proceeding
1681 if ((buffer_type
== loader_dri3_buffer_back
||
1682 (buffer_type
== loader_dri3_buffer_front
&& draw
->have_fake_front
))
1685 /* Fill the new buffer with data from an old buffer */
1686 dri3_fence_await(draw
->conn
, draw
, buffer
);
1687 if (!loader_dri3_blit_image(draw
,
1690 0, 0, draw
->width
, draw
->height
,
1692 !buffer
->linear_buffer
) {
1693 dri3_fence_reset(draw
->conn
, new_buffer
);
1694 dri3_copy_area(draw
->conn
,
1697 dri3_drawable_gc(draw
),
1699 draw
->width
, draw
->height
);
1700 dri3_fence_trigger(draw
->conn
, new_buffer
);
1702 dri3_free_render_buffer(draw
, buffer
);
1703 } else if (buffer_type
== loader_dri3_buffer_front
) {
1704 /* Fill the new fake front with data from a real front */
1705 loader_dri3_swapbuffer_barrier(draw
);
1706 dri3_fence_reset(draw
->conn
, new_buffer
);
1707 dri3_copy_area(draw
->conn
,
1710 dri3_drawable_gc(draw
),
1712 draw
->width
, draw
->height
);
1713 dri3_fence_trigger(draw
->conn
, new_buffer
);
1715 if (new_buffer
->linear_buffer
) {
1716 dri3_fence_await(draw
->conn
, draw
, new_buffer
);
1717 (void) loader_dri3_blit_image(draw
,
1719 new_buffer
->linear_buffer
,
1720 0, 0, draw
->width
, draw
->height
,
1724 buffer
= new_buffer
;
1725 draw
->buffers
[buf_id
] = buffer
;
1727 dri3_fence_await(draw
->conn
, draw
, buffer
);
1730 * Do we need to preserve the content of a previous buffer?
1732 * Note that this blit is needed only to avoid a wait for a buffer that
1733 * is currently in the flip chain or being scanned out from. That's really
1734 * a tradeoff. If we're ok with the wait we can reduce the number of back
1735 * buffers to 1 for SWAP_EXCHANGE, and 1 for SWAP_COPY,
1736 * but in the latter case we must disallow page-flipping.
1738 if (buffer_type
== loader_dri3_buffer_back
&&
1739 draw
->cur_blit_source
!= -1 &&
1740 draw
->buffers
[draw
->cur_blit_source
] &&
1741 buffer
!= draw
->buffers
[draw
->cur_blit_source
]) {
1743 struct loader_dri3_buffer
*source
= draw
->buffers
[draw
->cur_blit_source
];
1745 /* Avoid flushing here. Will propably do good for tiling hardware. */
1746 (void) loader_dri3_blit_image(draw
,
1749 0, 0, draw
->width
, draw
->height
,
1751 buffer
->last_swap
= source
->last_swap
;
1752 draw
->cur_blit_source
= -1;
1754 /* Return the requested buffer */
1758 /** dri3_free_buffers
1760 * Free the front bufffer or all of the back buffers. Used
1761 * when the application changes which buffers it needs
1764 dri3_free_buffers(__DRIdrawable
*driDrawable
,
1765 enum loader_dri3_buffer_type buffer_type
,
1766 struct loader_dri3_drawable
*draw
)
1768 struct loader_dri3_buffer
*buffer
;
1773 switch (buffer_type
) {
1774 case loader_dri3_buffer_back
:
1775 first_id
= LOADER_DRI3_BACK_ID(0);
1776 n_id
= LOADER_DRI3_MAX_BACK
;
1777 draw
->cur_blit_source
= -1;
1779 case loader_dri3_buffer_front
:
1780 first_id
= LOADER_DRI3_FRONT_ID
;
1781 /* Don't free a fake front holding new backbuffer content. */
1782 n_id
= (draw
->cur_blit_source
== LOADER_DRI3_FRONT_ID
) ? 0 : 1;
1785 for (buf_id
= first_id
; buf_id
< first_id
+ n_id
; buf_id
++) {
1786 buffer
= draw
->buffers
[buf_id
];
1788 dri3_free_render_buffer(draw
, buffer
);
1789 draw
->buffers
[buf_id
] = NULL
;
1794 /** loader_dri3_get_buffers
1796 * The published buffer allocation API.
1797 * Returns all of the necessary buffers, allocating
1801 loader_dri3_get_buffers(__DRIdrawable
*driDrawable
,
1802 unsigned int format
,
1804 void *loaderPrivate
,
1805 uint32_t buffer_mask
,
1806 struct __DRIimageList
*buffers
)
1808 struct loader_dri3_drawable
*draw
= loaderPrivate
;
1809 struct loader_dri3_buffer
*front
, *back
;
1812 buffers
->image_mask
= 0;
1813 buffers
->front
= NULL
;
1814 buffers
->back
= NULL
;
1819 if (!dri3_update_drawable(driDrawable
, draw
))
1822 dri3_update_num_back(draw
);
1824 /* Free no longer needed back buffers */
1825 for (buf_id
= draw
->num_back
; buf_id
< LOADER_DRI3_MAX_BACK
; buf_id
++) {
1826 if (draw
->cur_blit_source
!= buf_id
&& draw
->buffers
[buf_id
]) {
1827 dri3_free_render_buffer(draw
, draw
->buffers
[buf_id
]);
1828 draw
->buffers
[buf_id
] = NULL
;
1832 /* pixmaps always have front buffers.
1833 * Exchange swaps also mandate fake front buffers.
1835 if (draw
->is_pixmap
|| draw
->swap_method
== __DRI_ATTRIB_SWAP_EXCHANGE
)
1836 buffer_mask
|= __DRI_IMAGE_BUFFER_FRONT
;
1838 if (buffer_mask
& __DRI_IMAGE_BUFFER_FRONT
) {
1839 /* All pixmaps are owned by the server gpu.
1840 * When we use a different gpu, we can't use the pixmap
1841 * as buffer since it is potentially tiled a way
1842 * our device can't understand. In this case, use
1843 * a fake front buffer. Hopefully the pixmap
1844 * content will get synced with the fake front
1847 if (draw
->is_pixmap
&& !draw
->is_different_gpu
)
1848 front
= dri3_get_pixmap_buffer(driDrawable
,
1850 loader_dri3_buffer_front
,
1853 front
= dri3_get_buffer(driDrawable
,
1855 loader_dri3_buffer_front
,
1861 dri3_free_buffers(driDrawable
, loader_dri3_buffer_front
, draw
);
1862 draw
->have_fake_front
= 0;
1865 if (buffer_mask
& __DRI_IMAGE_BUFFER_BACK
) {
1866 back
= dri3_get_buffer(driDrawable
,
1868 loader_dri3_buffer_back
,
1872 draw
->have_back
= 1;
1874 dri3_free_buffers(driDrawable
, loader_dri3_buffer_back
, draw
);
1875 draw
->have_back
= 0;
1879 buffers
->image_mask
|= __DRI_IMAGE_BUFFER_FRONT
;
1880 buffers
->front
= front
->image
;
1881 draw
->have_fake_front
= draw
->is_different_gpu
|| !draw
->is_pixmap
;
1885 buffers
->image_mask
|= __DRI_IMAGE_BUFFER_BACK
;
1886 buffers
->back
= back
->image
;
1889 draw
->stamp
= stamp
;
1894 /** loader_dri3_update_drawable_geometry
1896 * Get the current drawable geometry.
1899 loader_dri3_update_drawable_geometry(struct loader_dri3_drawable
*draw
)
1901 xcb_get_geometry_cookie_t geom_cookie
;
1902 xcb_get_geometry_reply_t
*geom_reply
;
1904 geom_cookie
= xcb_get_geometry(draw
->conn
, draw
->drawable
);
1906 geom_reply
= xcb_get_geometry_reply(draw
->conn
, geom_cookie
, NULL
);
1909 draw
->width
= geom_reply
->width
;
1910 draw
->height
= geom_reply
->height
;
1911 draw
->vtable
->set_drawable_size(draw
, draw
->width
, draw
->height
);
1912 draw
->ext
->flush
->invalidate(draw
->dri_drawable
);
1920 * Make sure the server has flushed all pending swap buffers to hardware
1921 * for this drawable. Ideally we'd want to send an X protocol request to
1922 * have the server block our connection until the swaps are complete. That
1923 * would avoid the potential round-trip here.
1926 loader_dri3_swapbuffer_barrier(struct loader_dri3_drawable
*draw
)
1928 int64_t ust
, msc
, sbc
;
1930 (void) loader_dri3_wait_for_sbc(draw
, 0, &ust
, &msc
, &sbc
);
1934 * Perform any cleanup associated with a close screen operation.
1935 * \param dri_screen[in,out] Pointer to __DRIscreen about to be closed.
1937 * This function destroys the screen's cached swap context if any.
1940 loader_dri3_close_screen(__DRIscreen
*dri_screen
)
1942 mtx_lock(&blit_context
.mtx
);
1943 if (blit_context
.ctx
&& blit_context
.cur_screen
== dri_screen
) {
1944 blit_context
.core
->destroyContext(blit_context
.ctx
);
1945 blit_context
.ctx
= NULL
;
1947 mtx_unlock(&blit_context
.mtx
);
1951 * Find a backbuffer slot - potentially allocating a back buffer
1953 * \param draw[in,out] Pointer to the drawable for which to find back.
1954 * \return Pointer to a new back buffer or NULL if allocation failed or was
1957 * Find a potentially new back buffer, and if it's not been allocated yet and
1958 * in addition needs initializing, then try to allocate and initialize it.
1961 static struct loader_dri3_buffer
*
1962 dri3_find_back_alloc(struct loader_dri3_drawable
*draw
)
1964 struct loader_dri3_buffer
*back
;
1967 id
= dri3_find_back(draw
);
1971 back
= draw
->buffers
[id
];
1972 /* Allocate a new back if we haven't got one */
1973 if (!back
&& draw
->back_format
!= __DRI_IMAGE_FORMAT_NONE
&&
1974 dri3_update_drawable(draw
->dri_drawable
, draw
))
1975 back
= dri3_alloc_render_buffer(draw
, draw
->back_format
,
1976 draw
->width
, draw
->height
, draw
->depth
);
1981 draw
->buffers
[id
] = back
;
1983 /* If necessary, prefill the back with data according to swap_method mode. */
1984 if (draw
->cur_blit_source
!= -1 &&
1985 draw
->buffers
[draw
->cur_blit_source
] &&
1986 back
!= draw
->buffers
[draw
->cur_blit_source
]) {
1987 struct loader_dri3_buffer
*source
= draw
->buffers
[draw
->cur_blit_source
];
1989 dri3_fence_await(draw
->conn
, draw
, source
);
1990 dri3_fence_await(draw
->conn
, draw
, back
);
1991 (void) loader_dri3_blit_image(draw
,
1994 0, 0, draw
->width
, draw
->height
,
1996 back
->last_swap
= source
->last_swap
;
1997 draw
->cur_blit_source
= -1;