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 if (ce
->mode
== XCB_PRESENT_COMPLETE_MODE_SUBOPTIMAL_COPY
&&
393 draw
->last_present_mode
!= ce
->mode
) {
394 for (int b
= 0; b
< ARRAY_SIZE(draw
->buffers
); b
++) {
395 if (draw
->buffers
[b
])
396 draw
->buffers
[b
]->reallocate
= true;
400 draw
->last_present_mode
= ce
->mode
;
402 if (draw
->vtable
->show_fps
)
403 draw
->vtable
->show_fps(draw
, ce
->ust
);
407 } else if (ce
->serial
== draw
->eid
) {
408 draw
->notify_ust
= ce
->ust
;
409 draw
->notify_msc
= ce
->msc
;
413 case XCB_PRESENT_EVENT_IDLE_NOTIFY
: {
414 xcb_present_idle_notify_event_t
*ie
= (void *) ge
;
417 for (b
= 0; b
< ARRAY_SIZE(draw
->buffers
); b
++) {
418 struct loader_dri3_buffer
*buf
= draw
->buffers
[b
];
420 if (buf
&& buf
->pixmap
== ie
->pixmap
)
423 if (buf
&& draw
->cur_blit_source
!= b
&& !buf
->busy
&&
425 (draw
->num_back
<= b
&& b
< LOADER_DRI3_MAX_BACK
))) {
426 dri3_free_render_buffer(draw
, buf
);
427 draw
->buffers
[b
] = NULL
;
437 dri3_wait_for_event_locked(struct loader_dri3_drawable
*draw
)
439 xcb_generic_event_t
*ev
;
440 xcb_present_generic_event_t
*ge
;
442 xcb_flush(draw
->conn
);
444 /* Only have one thread waiting for events at a time */
445 if (draw
->has_event_waiter
) {
446 cnd_wait(&draw
->event_cnd
, &draw
->mtx
);
447 /* Another thread has updated the protected info, so retest. */
450 draw
->has_event_waiter
= true;
451 /* Allow other threads access to the drawable while we're waiting. */
452 mtx_unlock(&draw
->mtx
);
453 ev
= xcb_wait_for_special_event(draw
->conn
, draw
->special_event
);
454 mtx_lock(&draw
->mtx
);
455 draw
->has_event_waiter
= false;
456 cnd_broadcast(&draw
->event_cnd
);
461 dri3_handle_present_event(draw
, ge
);
465 /** loader_dri3_wait_for_msc
467 * Get the X server to send an event when the target msc/divisor/remainder is
471 loader_dri3_wait_for_msc(struct loader_dri3_drawable
*draw
,
473 int64_t divisor
, int64_t remainder
,
474 int64_t *ust
, int64_t *msc
, int64_t *sbc
)
476 xcb_void_cookie_t cookie
= xcb_present_notify_msc(draw
->conn
,
482 xcb_generic_event_t
*ev
;
483 unsigned full_sequence
;
485 mtx_lock(&draw
->mtx
);
486 xcb_flush(draw
->conn
);
488 /* Wait for the event */
490 ev
= xcb_wait_for_special_event(draw
->conn
, draw
->special_event
);
492 mtx_unlock(&draw
->mtx
);
496 full_sequence
= ev
->full_sequence
;
497 dri3_handle_present_event(draw
, (void *) ev
);
498 } while (full_sequence
!= cookie
.sequence
|| draw
->notify_msc
< target_msc
);
500 *ust
= draw
->notify_ust
;
501 *msc
= draw
->notify_msc
;
502 *sbc
= draw
->recv_sbc
;
503 mtx_unlock(&draw
->mtx
);
508 /** loader_dri3_wait_for_sbc
510 * Wait for the completed swap buffer count to reach the specified
511 * target. Presumably the application knows that this will be reached with
512 * outstanding complete events, or we're going to be here awhile.
515 loader_dri3_wait_for_sbc(struct loader_dri3_drawable
*draw
,
516 int64_t target_sbc
, int64_t *ust
,
517 int64_t *msc
, int64_t *sbc
)
519 /* From the GLX_OML_sync_control spec:
521 * "If <target_sbc> = 0, the function will block until all previous
522 * swaps requested with glXSwapBuffersMscOML for that window have
525 mtx_lock(&draw
->mtx
);
527 target_sbc
= draw
->send_sbc
;
529 while (draw
->recv_sbc
< target_sbc
) {
530 if (!dri3_wait_for_event_locked(draw
)) {
531 mtx_unlock(&draw
->mtx
);
538 *sbc
= draw
->recv_sbc
;
539 mtx_unlock(&draw
->mtx
);
543 /** loader_dri3_find_back
545 * Find an idle back buffer. If there isn't one, then
546 * wait for a present idle notify event from the X server
549 dri3_find_back(struct loader_dri3_drawable
*draw
)
554 mtx_lock(&draw
->mtx
);
555 /* Increase the likelyhood of reusing current buffer */
556 dri3_flush_present_events(draw
);
558 /* Check whether we need to reuse the current back buffer as new back.
559 * In that case, wait until it's not busy anymore.
561 dri3_update_num_back(draw
);
562 num_to_consider
= draw
->num_back
;
563 if (!loader_dri3_have_image_blit(draw
) && draw
->cur_blit_source
!= -1) {
565 draw
->cur_blit_source
= -1;
569 for (b
= 0; b
< num_to_consider
; b
++) {
570 int id
= LOADER_DRI3_BACK_ID((b
+ draw
->cur_back
) % draw
->num_back
);
571 struct loader_dri3_buffer
*buffer
= draw
->buffers
[id
];
573 if (!buffer
|| !buffer
->busy
) {
575 mtx_unlock(&draw
->mtx
);
579 if (!dri3_wait_for_event_locked(draw
)) {
580 mtx_unlock(&draw
->mtx
);
586 static xcb_gcontext_t
587 dri3_drawable_gc(struct loader_dri3_drawable
*draw
)
591 xcb_create_gc(draw
->conn
,
592 (draw
->gc
= xcb_generate_id(draw
->conn
)),
594 XCB_GC_GRAPHICS_EXPOSURES
,
601 static struct loader_dri3_buffer
*
602 dri3_back_buffer(struct loader_dri3_drawable
*draw
)
604 return draw
->buffers
[LOADER_DRI3_BACK_ID(draw
->cur_back
)];
607 static struct loader_dri3_buffer
*
608 dri3_fake_front_buffer(struct loader_dri3_drawable
*draw
)
610 return draw
->buffers
[LOADER_DRI3_FRONT_ID
];
614 dri3_copy_area(xcb_connection_t
*c
,
615 xcb_drawable_t src_drawable
,
616 xcb_drawable_t dst_drawable
,
625 xcb_void_cookie_t cookie
;
627 cookie
= xcb_copy_area_checked(c
,
637 xcb_discard_reply(c
, cookie
.sequence
);
641 * Asks the driver to flush any queued work necessary for serializing with the
642 * X command stream, and optionally the slightly more strict requirement of
643 * glFlush() equivalence (which would require flushing even if nothing had
644 * been drawn to a window system framebuffer, for example).
647 loader_dri3_flush(struct loader_dri3_drawable
*draw
,
649 enum __DRI2throttleReason throttle_reason
)
651 /* NEED TO CHECK WHETHER CONTEXT IS NULL */
652 __DRIcontext
*dri_context
= draw
->vtable
->get_dri_context(draw
);
655 draw
->ext
->flush
->flush_with_flags(dri_context
, draw
->dri_drawable
,
656 flags
, throttle_reason
);
661 loader_dri3_copy_sub_buffer(struct loader_dri3_drawable
*draw
,
663 int width
, int height
,
666 struct loader_dri3_buffer
*back
;
667 unsigned flags
= __DRI2_FLUSH_DRAWABLE
;
669 /* Check we have the right attachments */
670 if (!draw
->have_back
|| draw
->is_pixmap
)
674 flags
|= __DRI2_FLUSH_CONTEXT
;
675 loader_dri3_flush(draw
, flags
, __DRI2_THROTTLE_SWAPBUFFER
);
677 back
= dri3_find_back_alloc(draw
);
681 y
= draw
->height
- y
- height
;
683 if (draw
->is_different_gpu
) {
684 /* Update the linear buffer part of the back buffer
685 * for the dri3_copy_area operation
687 (void) loader_dri3_blit_image(draw
,
690 0, 0, back
->width
, back
->height
,
691 0, 0, __BLIT_FLAG_FLUSH
);
694 loader_dri3_swapbuffer_barrier(draw
);
695 dri3_fence_reset(draw
->conn
, back
);
696 dri3_copy_area(draw
->conn
,
699 dri3_drawable_gc(draw
),
700 x
, y
, x
, y
, width
, height
);
701 dri3_fence_trigger(draw
->conn
, back
);
702 /* Refresh the fake front (if present) after we just damaged the real
705 if (draw
->have_fake_front
&&
706 !loader_dri3_blit_image(draw
,
707 dri3_fake_front_buffer(draw
)->image
,
710 x
, y
, __BLIT_FLAG_FLUSH
) &&
711 !draw
->is_different_gpu
) {
712 dri3_fence_reset(draw
->conn
, dri3_fake_front_buffer(draw
));
713 dri3_copy_area(draw
->conn
,
715 dri3_fake_front_buffer(draw
)->pixmap
,
716 dri3_drawable_gc(draw
),
717 x
, y
, x
, y
, width
, height
);
718 dri3_fence_trigger(draw
->conn
, dri3_fake_front_buffer(draw
));
719 dri3_fence_await(draw
->conn
, NULL
, dri3_fake_front_buffer(draw
));
721 dri3_fence_await(draw
->conn
, draw
, back
);
725 loader_dri3_copy_drawable(struct loader_dri3_drawable
*draw
,
729 loader_dri3_flush(draw
, __DRI2_FLUSH_DRAWABLE
, 0);
731 dri3_fence_reset(draw
->conn
, dri3_fake_front_buffer(draw
));
732 dri3_copy_area(draw
->conn
,
734 dri3_drawable_gc(draw
),
735 0, 0, 0, 0, draw
->width
, draw
->height
);
736 dri3_fence_trigger(draw
->conn
, dri3_fake_front_buffer(draw
));
737 dri3_fence_await(draw
->conn
, draw
, dri3_fake_front_buffer(draw
));
741 loader_dri3_wait_x(struct loader_dri3_drawable
*draw
)
743 struct loader_dri3_buffer
*front
;
745 if (draw
== NULL
|| !draw
->have_fake_front
)
748 front
= dri3_fake_front_buffer(draw
);
750 loader_dri3_copy_drawable(draw
, front
->pixmap
, draw
->drawable
);
752 /* In the psc->is_different_gpu case, the linear buffer has been updated,
753 * but not yet the tiled buffer.
754 * Copy back to the tiled buffer we use for rendering.
755 * Note that we don't need flushing.
757 if (draw
->is_different_gpu
)
758 (void) loader_dri3_blit_image(draw
,
760 front
->linear_buffer
,
761 0, 0, front
->width
, front
->height
,
766 loader_dri3_wait_gl(struct loader_dri3_drawable
*draw
)
768 struct loader_dri3_buffer
*front
;
770 if (draw
== NULL
|| !draw
->have_fake_front
)
773 front
= dri3_fake_front_buffer(draw
);
775 /* In the psc->is_different_gpu case, we update the linear_buffer
776 * before updating the real front.
778 if (draw
->is_different_gpu
)
779 (void) loader_dri3_blit_image(draw
,
780 front
->linear_buffer
,
782 0, 0, front
->width
, front
->height
,
783 0, 0, __BLIT_FLAG_FLUSH
);
784 loader_dri3_swapbuffer_barrier(draw
);
785 loader_dri3_copy_drawable(draw
, draw
->drawable
, front
->pixmap
);
788 /** dri3_flush_present_events
790 * Process any present events that have been received from the X server
793 dri3_flush_present_events(struct loader_dri3_drawable
*draw
)
795 /* Check to see if any configuration changes have occurred
796 * since we were last invoked
798 if (draw
->has_event_waiter
)
801 if (draw
->special_event
) {
802 xcb_generic_event_t
*ev
;
804 while ((ev
= xcb_poll_for_special_event(draw
->conn
,
805 draw
->special_event
)) != NULL
) {
806 xcb_present_generic_event_t
*ge
= (void *) ev
;
807 dri3_handle_present_event(draw
, ge
);
812 /** loader_dri3_swap_buffers_msc
814 * Make the current back buffer visible using the present extension
817 loader_dri3_swap_buffers_msc(struct loader_dri3_drawable
*draw
,
818 int64_t target_msc
, int64_t divisor
,
819 int64_t remainder
, unsigned flush_flags
,
822 struct loader_dri3_buffer
*back
;
824 uint32_t options
= XCB_PRESENT_OPTION_NONE
;
826 draw
->vtable
->flush_drawable(draw
, flush_flags
);
828 back
= dri3_find_back_alloc(draw
);
830 mtx_lock(&draw
->mtx
);
831 if (draw
->is_different_gpu
&& back
) {
832 /* Update the linear buffer before presenting the pixmap */
833 (void) loader_dri3_blit_image(draw
,
836 0, 0, back
->width
, back
->height
,
837 0, 0, __BLIT_FLAG_FLUSH
);
840 /* If we need to preload the new back buffer, remember the source.
841 * The force_copy parameter is used by EGL to attempt to preserve
842 * the back buffer across a call to this function.
844 if (draw
->swap_method
!= __DRI_ATTRIB_SWAP_UNDEFINED
|| force_copy
)
845 draw
->cur_blit_source
= LOADER_DRI3_BACK_ID(draw
->cur_back
);
847 /* Exchange the back and fake front. Even though the server knows about these
848 * buffers, it has no notion of back and fake front.
850 if (back
&& draw
->have_fake_front
) {
851 struct loader_dri3_buffer
*tmp
;
853 tmp
= dri3_fake_front_buffer(draw
);
854 draw
->buffers
[LOADER_DRI3_FRONT_ID
] = back
;
855 draw
->buffers
[LOADER_DRI3_BACK_ID(draw
->cur_back
)] = tmp
;
857 if (draw
->swap_method
== __DRI_ATTRIB_SWAP_COPY
|| force_copy
)
858 draw
->cur_blit_source
= LOADER_DRI3_FRONT_ID
;
861 dri3_flush_present_events(draw
);
863 if (back
&& !draw
->is_pixmap
) {
864 dri3_fence_reset(draw
->conn
, back
);
866 /* Compute when we want the frame shown by taking the last known
867 * successful MSC and adding in a swap interval for each outstanding swap
868 * request. target_msc=divisor=remainder=0 means "Use glXSwapBuffers()
872 if (target_msc
== 0 && divisor
== 0 && remainder
== 0)
873 target_msc
= draw
->msc
+ draw
->swap_interval
*
874 (draw
->send_sbc
- draw
->recv_sbc
);
875 else if (divisor
== 0 && remainder
> 0) {
876 /* From the GLX_OML_sync_control spec:
877 * "If <divisor> = 0, the swap will occur when MSC becomes
878 * greater than or equal to <target_msc>."
880 * Note that there's no mention of the remainder. The Present
881 * extension throws BadValue for remainder != 0 with divisor == 0, so
882 * just drop the passed in value.
887 /* From the GLX_EXT_swap_control spec
888 * and the EGL 1.4 spec (page 53):
890 * "If <interval> is set to a value of 0, buffer swaps are not
891 * synchronized to a video frame."
893 * Implementation note: It is possible to enable triple buffering
894 * behaviour by not using XCB_PRESENT_OPTION_ASYNC, but this should not be
897 if (draw
->swap_interval
== 0)
898 options
|= XCB_PRESENT_OPTION_ASYNC
;
900 /* If we need to populate the new back, but need to reuse the back
901 * buffer slot due to lack of local blit capabilities, make sure
902 * the server doesn't flip and we deadlock.
904 if (!loader_dri3_have_image_blit(draw
) && draw
->cur_blit_source
!= -1)
905 options
|= XCB_PRESENT_OPTION_COPY
;
907 if (draw
->multiplanes_available
)
908 options
|= XCB_PRESENT_OPTION_SUBOPTIMAL
;
911 back
->last_swap
= draw
->send_sbc
;
912 xcb_present_pixmap(draw
->conn
,
915 (uint32_t) draw
->send_sbc
,
920 None
, /* target_crtc */
927 ret
= (int64_t) draw
->send_sbc
;
929 /* Schedule a server-side back-preserving blit if necessary.
930 * This happens iff all conditions below are satisfied:
931 * a) We have a fake front,
932 * b) We need to preserve the back buffer,
933 * c) We don't have local blit capabilities.
935 if (!loader_dri3_have_image_blit(draw
) && draw
->cur_blit_source
!= -1 &&
936 draw
->cur_blit_source
!= LOADER_DRI3_BACK_ID(draw
->cur_back
)) {
937 struct loader_dri3_buffer
*new_back
= dri3_back_buffer(draw
);
938 struct loader_dri3_buffer
*src
= draw
->buffers
[draw
->cur_blit_source
];
940 dri3_fence_reset(draw
->conn
, new_back
);
941 dri3_copy_area(draw
->conn
, src
->pixmap
,
943 dri3_drawable_gc(draw
),
944 0, 0, 0, 0, draw
->width
, draw
->height
);
945 dri3_fence_trigger(draw
->conn
, new_back
);
946 new_back
->last_swap
= src
->last_swap
;
949 xcb_flush(draw
->conn
);
953 mtx_unlock(&draw
->mtx
);
955 draw
->ext
->flush
->invalidate(draw
->dri_drawable
);
961 loader_dri3_query_buffer_age(struct loader_dri3_drawable
*draw
)
963 struct loader_dri3_buffer
*back
= dri3_find_back_alloc(draw
);
966 mtx_lock(&draw
->mtx
);
967 ret
= (!back
|| back
->last_swap
== 0) ? 0 :
968 draw
->send_sbc
- back
->last_swap
+ 1;
969 mtx_unlock(&draw
->mtx
);
976 * Wrapper around xcb_dri3_open
979 loader_dri3_open(xcb_connection_t
*conn
,
983 xcb_dri3_open_cookie_t cookie
;
984 xcb_dri3_open_reply_t
*reply
;
987 cookie
= xcb_dri3_open(conn
,
991 reply
= xcb_dri3_open_reply(conn
, cookie
, NULL
);
995 if (reply
->nfd
!= 1) {
1000 fd
= xcb_dri3_open_reply_fds(conn
, reply
)[0];
1002 fcntl(fd
, F_SETFD
, fcntl(fd
, F_GETFD
) | FD_CLOEXEC
);
1008 dri3_cpp_for_format(uint32_t format
) {
1010 case __DRI_IMAGE_FORMAT_R8
:
1012 case __DRI_IMAGE_FORMAT_RGB565
:
1013 case __DRI_IMAGE_FORMAT_GR88
:
1015 case __DRI_IMAGE_FORMAT_XRGB8888
:
1016 case __DRI_IMAGE_FORMAT_ARGB8888
:
1017 case __DRI_IMAGE_FORMAT_ABGR8888
:
1018 case __DRI_IMAGE_FORMAT_XBGR8888
:
1019 case __DRI_IMAGE_FORMAT_XRGB2101010
:
1020 case __DRI_IMAGE_FORMAT_ARGB2101010
:
1021 case __DRI_IMAGE_FORMAT_XBGR2101010
:
1022 case __DRI_IMAGE_FORMAT_ABGR2101010
:
1023 case __DRI_IMAGE_FORMAT_SARGB8
:
1025 case __DRI_IMAGE_FORMAT_NONE
:
1031 /* the DRIimage createImage function takes __DRI_IMAGE_FORMAT codes, while
1032 * the createImageFromFds call takes __DRI_IMAGE_FOURCC codes. To avoid
1033 * complete confusion, just deal in __DRI_IMAGE_FORMAT codes for now and
1034 * translate to __DRI_IMAGE_FOURCC codes in the call to createImageFromFds
1037 image_format_to_fourcc(int format
)
1040 /* Convert from __DRI_IMAGE_FORMAT to __DRI_IMAGE_FOURCC (sigh) */
1042 case __DRI_IMAGE_FORMAT_SARGB8
: return __DRI_IMAGE_FOURCC_SARGB8888
;
1043 case __DRI_IMAGE_FORMAT_RGB565
: return __DRI_IMAGE_FOURCC_RGB565
;
1044 case __DRI_IMAGE_FORMAT_XRGB8888
: return __DRI_IMAGE_FOURCC_XRGB8888
;
1045 case __DRI_IMAGE_FORMAT_ARGB8888
: return __DRI_IMAGE_FOURCC_ARGB8888
;
1046 case __DRI_IMAGE_FORMAT_ABGR8888
: return __DRI_IMAGE_FOURCC_ABGR8888
;
1047 case __DRI_IMAGE_FORMAT_XBGR8888
: return __DRI_IMAGE_FOURCC_XBGR8888
;
1048 case __DRI_IMAGE_FORMAT_XRGB2101010
: return __DRI_IMAGE_FOURCC_XRGB2101010
;
1049 case __DRI_IMAGE_FORMAT_ARGB2101010
: return __DRI_IMAGE_FOURCC_ARGB2101010
;
1050 case __DRI_IMAGE_FORMAT_XBGR2101010
: return __DRI_IMAGE_FOURCC_XBGR2101010
;
1051 case __DRI_IMAGE_FORMAT_ABGR2101010
: return __DRI_IMAGE_FOURCC_ABGR2101010
;
1057 has_supported_modifier(struct loader_dri3_drawable
*draw
, unsigned int format
,
1058 uint64_t *modifiers
, uint32_t count
)
1060 uint64_t *supported_modifiers
;
1061 int32_t supported_modifiers_count
;
1065 if (!draw
->ext
->image
->queryDmaBufModifiers(draw
->dri_screen
,
1066 format
, 0, NULL
, NULL
,
1067 &supported_modifiers_count
) ||
1068 supported_modifiers_count
== 0)
1071 supported_modifiers
= malloc(supported_modifiers_count
* sizeof(uint64_t));
1072 if (!supported_modifiers
)
1075 draw
->ext
->image
->queryDmaBufModifiers(draw
->dri_screen
, format
,
1076 supported_modifiers_count
,
1077 supported_modifiers
, NULL
,
1078 &supported_modifiers_count
);
1080 for (i
= 0; !found
&& i
< supported_modifiers_count
; i
++) {
1081 for (j
= 0; !found
&& j
< count
; j
++) {
1082 if (supported_modifiers
[i
] == modifiers
[j
])
1087 free(supported_modifiers
);
1091 /** loader_dri3_alloc_render_buffer
1093 * Use the driver createImage function to construct a __DRIimage, then
1094 * get a file descriptor for that and create an X pixmap from that
1096 * Allocate an xshmfence for synchronization
1098 static struct loader_dri3_buffer
*
1099 dri3_alloc_render_buffer(struct loader_dri3_drawable
*draw
, unsigned int format
,
1100 int width
, int height
, int depth
)
1102 struct loader_dri3_buffer
*buffer
;
1103 __DRIimage
*pixmap_buffer
;
1104 xcb_pixmap_t pixmap
;
1105 xcb_sync_fence_t sync_fence
;
1106 struct xshmfence
*shm_fence
;
1107 int buffer_fds
[4], fence_fd
;
1112 /* Create an xshmfence object and
1113 * prepare to send that to the X server
1116 fence_fd
= xshmfence_alloc_shm();
1120 shm_fence
= xshmfence_map_shm(fence_fd
);
1121 if (shm_fence
== NULL
)
1124 /* Allocate the image from the driver
1126 buffer
= calloc(1, sizeof *buffer
);
1130 buffer
->cpp
= dri3_cpp_for_format(format
);
1134 if (!draw
->is_different_gpu
) {
1135 if (draw
->multiplanes_available
&&
1136 draw
->ext
->image
->base
.version
>= 15 &&
1137 draw
->ext
->image
->queryDmaBufModifiers
&&
1138 draw
->ext
->image
->createImageWithModifiers
) {
1139 xcb_dri3_get_supported_modifiers_cookie_t mod_cookie
;
1140 xcb_dri3_get_supported_modifiers_reply_t
*mod_reply
;
1141 xcb_generic_error_t
*error
= NULL
;
1142 uint64_t *modifiers
= NULL
;
1145 mod_cookie
= xcb_dri3_get_supported_modifiers(draw
->conn
,
1147 depth
, buffer
->cpp
* 8);
1148 mod_reply
= xcb_dri3_get_supported_modifiers_reply(draw
->conn
,
1154 if (mod_reply
->num_window_modifiers
) {
1155 count
= mod_reply
->num_window_modifiers
;
1156 modifiers
= malloc(count
* sizeof(uint64_t));
1163 xcb_dri3_get_supported_modifiers_window_modifiers(mod_reply
),
1164 count
* sizeof(uint64_t));
1166 if (!has_supported_modifier(draw
, image_format_to_fourcc(format
),
1167 modifiers
, count
)) {
1174 if (mod_reply
->num_screen_modifiers
&& modifiers
== NULL
) {
1175 count
= mod_reply
->num_screen_modifiers
;
1176 modifiers
= malloc(count
* sizeof(uint64_t));
1184 xcb_dri3_get_supported_modifiers_screen_modifiers(mod_reply
),
1185 count
* sizeof(uint64_t));
1190 buffer
->image
= draw
->ext
->image
->createImageWithModifiers(draw
->dri_screen
,
1200 buffer
->image
= draw
->ext
->image
->createImage(draw
->dri_screen
,
1203 __DRI_IMAGE_USE_SHARE
|
1204 __DRI_IMAGE_USE_SCANOUT
|
1205 __DRI_IMAGE_USE_BACKBUFFER
,
1208 pixmap_buffer
= buffer
->image
;
1213 buffer
->image
= draw
->ext
->image
->createImage(draw
->dri_screen
,
1222 buffer
->linear_buffer
=
1223 draw
->ext
->image
->createImage(draw
->dri_screen
,
1224 width
, height
, format
,
1225 __DRI_IMAGE_USE_SHARE
|
1226 __DRI_IMAGE_USE_LINEAR
|
1227 __DRI_IMAGE_USE_BACKBUFFER
,
1229 pixmap_buffer
= buffer
->linear_buffer
;
1231 if (!buffer
->linear_buffer
)
1232 goto no_linear_buffer
;
1235 /* X want some information about the planes, so ask the image for it
1237 if (!draw
->ext
->image
->queryImage(pixmap_buffer
, __DRI_IMAGE_ATTRIB_NUM_PLANES
,
1241 for (i
= 0; i
< num_planes
; i
++) {
1242 __DRIimage
*image
= draw
->ext
->image
->fromPlanar(pixmap_buffer
, i
, NULL
);
1246 image
= pixmap_buffer
;
1249 ret
= draw
->ext
->image
->queryImage(image
, __DRI_IMAGE_ATTRIB_FD
,
1251 ret
&= draw
->ext
->image
->queryImage(image
, __DRI_IMAGE_ATTRIB_STRIDE
,
1252 &buffer
->strides
[i
]);
1253 ret
&= draw
->ext
->image
->queryImage(image
, __DRI_IMAGE_ATTRIB_OFFSET
,
1254 &buffer
->offsets
[i
]);
1255 if (image
!= pixmap_buffer
)
1256 draw
->ext
->image
->destroyImage(image
);
1259 goto no_buffer_attrib
;
1262 ret
= draw
->ext
->image
->queryImage(pixmap_buffer
,
1263 __DRI_IMAGE_ATTRIB_MODIFIER_UPPER
, &mod
);
1264 buffer
->modifier
= (uint64_t) mod
<< 32;
1265 ret
&= draw
->ext
->image
->queryImage(pixmap_buffer
,
1266 __DRI_IMAGE_ATTRIB_MODIFIER_LOWER
, &mod
);
1267 buffer
->modifier
|= (uint64_t)(mod
& 0xffffffff);
1270 buffer
->modifier
= DRM_FORMAT_MOD_INVALID
;
1272 pixmap
= xcb_generate_id(draw
->conn
);
1273 if (draw
->multiplanes_available
&&
1274 buffer
->modifier
!= DRM_FORMAT_MOD_INVALID
) {
1275 xcb_dri3_pixmap_from_buffers(draw
->conn
,
1280 buffer
->strides
[0], buffer
->offsets
[0],
1281 buffer
->strides
[1], buffer
->offsets
[1],
1282 buffer
->strides
[2], buffer
->offsets
[2],
1283 buffer
->strides
[3], buffer
->offsets
[3],
1284 depth
, buffer
->cpp
* 8,
1288 xcb_dri3_pixmap_from_buffer(draw
->conn
,
1292 width
, height
, buffer
->strides
[0],
1293 depth
, buffer
->cpp
* 8,
1297 xcb_dri3_fence_from_fd(draw
->conn
,
1299 (sync_fence
= xcb_generate_id(draw
->conn
)),
1303 buffer
->pixmap
= pixmap
;
1304 buffer
->own_pixmap
= true;
1305 buffer
->sync_fence
= sync_fence
;
1306 buffer
->shm_fence
= shm_fence
;
1307 buffer
->width
= width
;
1308 buffer
->height
= height
;
1310 /* Mark the buffer as idle
1312 dri3_fence_set(buffer
);
1318 close(buffer_fds
[i
]);
1320 draw
->ext
->image
->destroyImage(pixmap_buffer
);
1322 if (draw
->is_different_gpu
)
1323 draw
->ext
->image
->destroyImage(buffer
->image
);
1327 xshmfence_unmap_shm(shm_fence
);
1333 /** loader_dri3_update_drawable
1335 * Called the first time we use the drawable and then
1336 * after we receive present configure notify events to
1337 * track the geometry of the drawable
1340 dri3_update_drawable(__DRIdrawable
*driDrawable
,
1341 struct loader_dri3_drawable
*draw
)
1343 mtx_lock(&draw
->mtx
);
1344 if (draw
->first_init
) {
1345 xcb_get_geometry_cookie_t geom_cookie
;
1346 xcb_get_geometry_reply_t
*geom_reply
;
1347 xcb_void_cookie_t cookie
;
1348 xcb_generic_error_t
*error
;
1349 xcb_present_query_capabilities_cookie_t present_capabilities_cookie
;
1350 xcb_present_query_capabilities_reply_t
*present_capabilities_reply
;
1352 draw
->first_init
= false;
1354 /* Try to select for input on the window.
1356 * If the drawable is a window, this will get our events
1359 * Otherwise, we'll get a BadWindow error back from this request which
1360 * will let us know that the drawable is a pixmap instead.
1363 draw
->eid
= xcb_generate_id(draw
->conn
);
1365 xcb_present_select_input_checked(draw
->conn
, draw
->eid
, draw
->drawable
,
1366 XCB_PRESENT_EVENT_MASK_CONFIGURE_NOTIFY
|
1367 XCB_PRESENT_EVENT_MASK_COMPLETE_NOTIFY
|
1368 XCB_PRESENT_EVENT_MASK_IDLE_NOTIFY
);
1370 present_capabilities_cookie
=
1371 xcb_present_query_capabilities(draw
->conn
, draw
->drawable
);
1373 /* Create an XCB event queue to hold present events outside of the usual
1374 * application event queue
1376 draw
->special_event
= xcb_register_for_special_xge(draw
->conn
,
1380 geom_cookie
= xcb_get_geometry(draw
->conn
, draw
->drawable
);
1382 geom_reply
= xcb_get_geometry_reply(draw
->conn
, geom_cookie
, NULL
);
1385 mtx_unlock(&draw
->mtx
);
1389 draw
->width
= geom_reply
->width
;
1390 draw
->height
= geom_reply
->height
;
1391 draw
->depth
= geom_reply
->depth
;
1392 draw
->vtable
->set_drawable_size(draw
, draw
->width
, draw
->height
);
1396 draw
->is_pixmap
= false;
1398 /* Check to see if our select input call failed. If it failed with a
1399 * BadWindow error, then assume the drawable is a pixmap. Destroy the
1400 * special event queue created above and mark the drawable as a pixmap
1403 error
= xcb_request_check(draw
->conn
, cookie
);
1405 present_capabilities_reply
=
1406 xcb_present_query_capabilities_reply(draw
->conn
,
1407 present_capabilities_cookie
,
1410 if (present_capabilities_reply
) {
1411 draw
->present_capabilities
= present_capabilities_reply
->capabilities
;
1412 free(present_capabilities_reply
);
1414 draw
->present_capabilities
= 0;
1417 if (error
->error_code
!= BadWindow
) {
1419 mtx_unlock(&draw
->mtx
);
1422 draw
->is_pixmap
= true;
1423 xcb_unregister_for_special_event(draw
->conn
, draw
->special_event
);
1424 draw
->special_event
= NULL
;
1427 dri3_flush_present_events(draw
);
1428 mtx_unlock(&draw
->mtx
);
1433 loader_dri3_create_image(xcb_connection_t
*c
,
1434 xcb_dri3_buffer_from_pixmap_reply_t
*bp_reply
,
1435 unsigned int format
,
1436 __DRIscreen
*dri_screen
,
1437 const __DRIimageExtension
*image
,
1438 void *loaderPrivate
)
1441 __DRIimage
*image_planar
, *ret
;
1444 /* Get an FD for the pixmap object
1446 fds
= xcb_dri3_buffer_from_pixmap_reply_fds(c
, bp_reply
);
1448 stride
= bp_reply
->stride
;
1451 /* createImageFromFds creates a wrapper __DRIimage structure which
1452 * can deal with multiple planes for things like Yuv images. So, once
1453 * we've gotten the planar wrapper, pull the single plane out of it and
1454 * discard the wrapper.
1456 image_planar
= image
->createImageFromFds(dri_screen
,
1459 image_format_to_fourcc(format
),
1461 &stride
, &offset
, loaderPrivate
);
1466 ret
= image
->fromPlanar(image_planar
, 0, loaderPrivate
);
1471 image
->destroyImage(image_planar
);
1477 loader_dri3_create_image_from_buffers(xcb_connection_t
*c
,
1478 xcb_dri3_buffers_from_pixmap_reply_t
*bp_reply
,
1479 unsigned int format
,
1480 __DRIscreen
*dri_screen
,
1481 const __DRIimageExtension
*image
,
1482 void *loaderPrivate
)
1486 uint32_t *strides_in
, *offsets_in
;
1487 int strides
[4], offsets
[4];
1491 if (bp_reply
->nfd
> 4)
1494 fds
= xcb_dri3_buffers_from_pixmap_reply_fds(c
, bp_reply
);
1495 strides_in
= xcb_dri3_buffers_from_pixmap_strides(bp_reply
);
1496 offsets_in
= xcb_dri3_buffers_from_pixmap_offsets(bp_reply
);
1497 for (i
= 0; i
< bp_reply
->nfd
; i
++) {
1498 strides
[i
] = strides_in
[i
];
1499 offsets
[i
] = offsets_in
[i
];
1502 ret
= image
->createImageFromDmaBufs2(dri_screen
,
1505 image_format_to_fourcc(format
),
1509 0, 0, 0, 0, /* UNDEFINED */
1510 &error
, loaderPrivate
);
1512 for (i
= 0; i
< bp_reply
->nfd
; i
++)
1518 /** dri3_get_pixmap_buffer
1520 * Get the DRM object for a pixmap from the X server and
1521 * wrap that with a __DRIimage structure using createImageFromFds
1523 static struct loader_dri3_buffer
*
1524 dri3_get_pixmap_buffer(__DRIdrawable
*driDrawable
, unsigned int format
,
1525 enum loader_dri3_buffer_type buffer_type
,
1526 struct loader_dri3_drawable
*draw
)
1528 int buf_id
= loader_dri3_pixmap_buf_id(buffer_type
);
1529 struct loader_dri3_buffer
*buffer
= draw
->buffers
[buf_id
];
1530 xcb_drawable_t pixmap
;
1531 xcb_sync_fence_t sync_fence
;
1532 struct xshmfence
*shm_fence
;
1536 __DRIscreen
*cur_screen
;
1541 pixmap
= draw
->drawable
;
1543 buffer
= calloc(1, sizeof *buffer
);
1547 fence_fd
= xshmfence_alloc_shm();
1550 shm_fence
= xshmfence_map_shm(fence_fd
);
1551 if (shm_fence
== NULL
) {
1556 /* Get the currently-bound screen or revert to using the drawable's screen if
1557 * no contexts are currently bound. The latter case is at least necessary for
1558 * obs-studio, when using Window Capture (Xcomposite) as a Source.
1560 cur_screen
= draw
->vtable
->get_dri_screen();
1562 cur_screen
= draw
->dri_screen
;
1565 xcb_dri3_fence_from_fd(draw
->conn
,
1567 (sync_fence
= xcb_generate_id(draw
->conn
)),
1571 if (draw
->multiplanes_available
&&
1572 draw
->ext
->image
->base
.version
>= 15 &&
1573 draw
->ext
->image
->createImageFromDmaBufs2
) {
1574 xcb_dri3_buffers_from_pixmap_cookie_t bps_cookie
;
1575 xcb_dri3_buffers_from_pixmap_reply_t
*bps_reply
;
1577 bps_cookie
= xcb_dri3_buffers_from_pixmap(draw
->conn
, pixmap
);
1578 bps_reply
= xcb_dri3_buffers_from_pixmap_reply(draw
->conn
, bps_cookie
,
1583 loader_dri3_create_image_from_buffers(draw
->conn
, bps_reply
, format
,
1584 cur_screen
, draw
->ext
->image
,
1586 width
= bps_reply
->width
;
1587 height
= bps_reply
->height
;
1590 xcb_dri3_buffer_from_pixmap_cookie_t bp_cookie
;
1591 xcb_dri3_buffer_from_pixmap_reply_t
*bp_reply
;
1593 bp_cookie
= xcb_dri3_buffer_from_pixmap(draw
->conn
, pixmap
);
1594 bp_reply
= xcb_dri3_buffer_from_pixmap_reply(draw
->conn
, bp_cookie
, NULL
);
1598 buffer
->image
= loader_dri3_create_image(draw
->conn
, bp_reply
, format
,
1599 cur_screen
, draw
->ext
->image
,
1601 width
= bp_reply
->width
;
1602 height
= bp_reply
->height
;
1609 buffer
->pixmap
= pixmap
;
1610 buffer
->own_pixmap
= false;
1611 buffer
->width
= width
;
1612 buffer
->height
= height
;
1613 buffer
->shm_fence
= shm_fence
;
1614 buffer
->sync_fence
= sync_fence
;
1616 draw
->buffers
[buf_id
] = buffer
;
1621 xcb_sync_destroy_fence(draw
->conn
, sync_fence
);
1622 xshmfence_unmap_shm(shm_fence
);
1631 * Find a front or back buffer, allocating new ones as necessary
1633 static struct loader_dri3_buffer
*
1634 dri3_get_buffer(__DRIdrawable
*driDrawable
,
1635 unsigned int format
,
1636 enum loader_dri3_buffer_type buffer_type
,
1637 struct loader_dri3_drawable
*draw
)
1639 struct loader_dri3_buffer
*buffer
;
1642 if (buffer_type
== loader_dri3_buffer_back
) {
1643 draw
->back_format
= format
;
1645 buf_id
= dri3_find_back(draw
);
1650 buf_id
= LOADER_DRI3_FRONT_ID
;
1653 buffer
= draw
->buffers
[buf_id
];
1655 /* Allocate a new buffer if there isn't an old one, if that
1656 * old one is the wrong size, or if it's suboptimal
1658 if (!buffer
|| buffer
->width
!= draw
->width
||
1659 buffer
->height
!= draw
->height
||
1660 buffer
->reallocate
) {
1661 struct loader_dri3_buffer
*new_buffer
;
1663 /* Allocate the new buffers
1665 new_buffer
= dri3_alloc_render_buffer(draw
,
1673 /* When resizing, copy the contents of the old buffer, waiting for that
1674 * copy to complete using our fences before proceeding
1676 if ((buffer_type
== loader_dri3_buffer_back
||
1677 (buffer_type
== loader_dri3_buffer_front
&& draw
->have_fake_front
))
1680 /* Fill the new buffer with data from an old buffer */
1681 dri3_fence_await(draw
->conn
, draw
, buffer
);
1682 if (!loader_dri3_blit_image(draw
,
1685 0, 0, draw
->width
, draw
->height
,
1687 !buffer
->linear_buffer
) {
1688 dri3_fence_reset(draw
->conn
, new_buffer
);
1689 dri3_copy_area(draw
->conn
,
1692 dri3_drawable_gc(draw
),
1694 draw
->width
, draw
->height
);
1695 dri3_fence_trigger(draw
->conn
, new_buffer
);
1697 dri3_free_render_buffer(draw
, buffer
);
1698 } else if (buffer_type
== loader_dri3_buffer_front
) {
1699 /* Fill the new fake front with data from a real front */
1700 loader_dri3_swapbuffer_barrier(draw
);
1701 dri3_fence_reset(draw
->conn
, new_buffer
);
1702 dri3_copy_area(draw
->conn
,
1705 dri3_drawable_gc(draw
),
1707 draw
->width
, draw
->height
);
1708 dri3_fence_trigger(draw
->conn
, new_buffer
);
1710 if (new_buffer
->linear_buffer
) {
1711 dri3_fence_await(draw
->conn
, draw
, new_buffer
);
1712 (void) loader_dri3_blit_image(draw
,
1714 new_buffer
->linear_buffer
,
1715 0, 0, draw
->width
, draw
->height
,
1719 buffer
= new_buffer
;
1720 draw
->buffers
[buf_id
] = buffer
;
1722 dri3_fence_await(draw
->conn
, draw
, buffer
);
1725 * Do we need to preserve the content of a previous buffer?
1727 * Note that this blit is needed only to avoid a wait for a buffer that
1728 * is currently in the flip chain or being scanned out from. That's really
1729 * a tradeoff. If we're ok with the wait we can reduce the number of back
1730 * buffers to 1 for SWAP_EXCHANGE, and 1 for SWAP_COPY,
1731 * but in the latter case we must disallow page-flipping.
1733 if (buffer_type
== loader_dri3_buffer_back
&&
1734 draw
->cur_blit_source
!= -1 &&
1735 draw
->buffers
[draw
->cur_blit_source
] &&
1736 buffer
!= draw
->buffers
[draw
->cur_blit_source
]) {
1738 struct loader_dri3_buffer
*source
= draw
->buffers
[draw
->cur_blit_source
];
1740 /* Avoid flushing here. Will propably do good for tiling hardware. */
1741 (void) loader_dri3_blit_image(draw
,
1744 0, 0, draw
->width
, draw
->height
,
1746 buffer
->last_swap
= source
->last_swap
;
1747 draw
->cur_blit_source
= -1;
1749 /* Return the requested buffer */
1753 /** dri3_free_buffers
1755 * Free the front bufffer or all of the back buffers. Used
1756 * when the application changes which buffers it needs
1759 dri3_free_buffers(__DRIdrawable
*driDrawable
,
1760 enum loader_dri3_buffer_type buffer_type
,
1761 struct loader_dri3_drawable
*draw
)
1763 struct loader_dri3_buffer
*buffer
;
1768 switch (buffer_type
) {
1769 case loader_dri3_buffer_back
:
1770 first_id
= LOADER_DRI3_BACK_ID(0);
1771 n_id
= LOADER_DRI3_MAX_BACK
;
1772 draw
->cur_blit_source
= -1;
1774 case loader_dri3_buffer_front
:
1775 first_id
= LOADER_DRI3_FRONT_ID
;
1776 /* Don't free a fake front holding new backbuffer content. */
1777 n_id
= (draw
->cur_blit_source
== LOADER_DRI3_FRONT_ID
) ? 0 : 1;
1780 for (buf_id
= first_id
; buf_id
< first_id
+ n_id
; buf_id
++) {
1781 buffer
= draw
->buffers
[buf_id
];
1783 dri3_free_render_buffer(draw
, buffer
);
1784 draw
->buffers
[buf_id
] = NULL
;
1789 /** loader_dri3_get_buffers
1791 * The published buffer allocation API.
1792 * Returns all of the necessary buffers, allocating
1796 loader_dri3_get_buffers(__DRIdrawable
*driDrawable
,
1797 unsigned int format
,
1799 void *loaderPrivate
,
1800 uint32_t buffer_mask
,
1801 struct __DRIimageList
*buffers
)
1803 struct loader_dri3_drawable
*draw
= loaderPrivate
;
1804 struct loader_dri3_buffer
*front
, *back
;
1806 buffers
->image_mask
= 0;
1807 buffers
->front
= NULL
;
1808 buffers
->back
= NULL
;
1813 if (!dri3_update_drawable(driDrawable
, draw
))
1816 /* pixmaps always have front buffers.
1817 * Exchange swaps also mandate fake front buffers.
1819 if (draw
->is_pixmap
|| draw
->swap_method
== __DRI_ATTRIB_SWAP_EXCHANGE
)
1820 buffer_mask
|= __DRI_IMAGE_BUFFER_FRONT
;
1822 if (buffer_mask
& __DRI_IMAGE_BUFFER_FRONT
) {
1823 /* All pixmaps are owned by the server gpu.
1824 * When we use a different gpu, we can't use the pixmap
1825 * as buffer since it is potentially tiled a way
1826 * our device can't understand. In this case, use
1827 * a fake front buffer. Hopefully the pixmap
1828 * content will get synced with the fake front
1831 if (draw
->is_pixmap
&& !draw
->is_different_gpu
)
1832 front
= dri3_get_pixmap_buffer(driDrawable
,
1834 loader_dri3_buffer_front
,
1837 front
= dri3_get_buffer(driDrawable
,
1839 loader_dri3_buffer_front
,
1845 dri3_free_buffers(driDrawable
, loader_dri3_buffer_front
, draw
);
1846 draw
->have_fake_front
= 0;
1849 if (buffer_mask
& __DRI_IMAGE_BUFFER_BACK
) {
1850 back
= dri3_get_buffer(driDrawable
,
1852 loader_dri3_buffer_back
,
1856 draw
->have_back
= 1;
1858 dri3_free_buffers(driDrawable
, loader_dri3_buffer_back
, draw
);
1859 draw
->have_back
= 0;
1863 buffers
->image_mask
|= __DRI_IMAGE_BUFFER_FRONT
;
1864 buffers
->front
= front
->image
;
1865 draw
->have_fake_front
= draw
->is_different_gpu
|| !draw
->is_pixmap
;
1869 buffers
->image_mask
|= __DRI_IMAGE_BUFFER_BACK
;
1870 buffers
->back
= back
->image
;
1873 draw
->stamp
= stamp
;
1878 /** loader_dri3_update_drawable_geometry
1880 * Get the current drawable geometry.
1883 loader_dri3_update_drawable_geometry(struct loader_dri3_drawable
*draw
)
1885 xcb_get_geometry_cookie_t geom_cookie
;
1886 xcb_get_geometry_reply_t
*geom_reply
;
1888 geom_cookie
= xcb_get_geometry(draw
->conn
, draw
->drawable
);
1890 geom_reply
= xcb_get_geometry_reply(draw
->conn
, geom_cookie
, NULL
);
1893 draw
->width
= geom_reply
->width
;
1894 draw
->height
= geom_reply
->height
;
1895 draw
->vtable
->set_drawable_size(draw
, draw
->width
, draw
->height
);
1896 draw
->ext
->flush
->invalidate(draw
->dri_drawable
);
1904 * Make sure the server has flushed all pending swap buffers to hardware
1905 * for this drawable. Ideally we'd want to send an X protocol request to
1906 * have the server block our connection until the swaps are complete. That
1907 * would avoid the potential round-trip here.
1910 loader_dri3_swapbuffer_barrier(struct loader_dri3_drawable
*draw
)
1912 int64_t ust
, msc
, sbc
;
1914 (void) loader_dri3_wait_for_sbc(draw
, 0, &ust
, &msc
, &sbc
);
1918 * Perform any cleanup associated with a close screen operation.
1919 * \param dri_screen[in,out] Pointer to __DRIscreen about to be closed.
1921 * This function destroys the screen's cached swap context if any.
1924 loader_dri3_close_screen(__DRIscreen
*dri_screen
)
1926 mtx_lock(&blit_context
.mtx
);
1927 if (blit_context
.ctx
&& blit_context
.cur_screen
== dri_screen
) {
1928 blit_context
.core
->destroyContext(blit_context
.ctx
);
1929 blit_context
.ctx
= NULL
;
1931 mtx_unlock(&blit_context
.mtx
);
1935 * Find a backbuffer slot - potentially allocating a back buffer
1937 * \param draw[in,out] Pointer to the drawable for which to find back.
1938 * \return Pointer to a new back buffer or NULL if allocation failed or was
1941 * Find a potentially new back buffer, and if it's not been allocated yet and
1942 * in addition needs initializing, then try to allocate and initialize it.
1945 static struct loader_dri3_buffer
*
1946 dri3_find_back_alloc(struct loader_dri3_drawable
*draw
)
1948 struct loader_dri3_buffer
*back
;
1951 id
= dri3_find_back(draw
);
1955 back
= draw
->buffers
[id
];
1956 /* Allocate a new back if we haven't got one */
1957 if (!back
&& draw
->back_format
!= __DRI_IMAGE_FORMAT_NONE
&&
1958 dri3_update_drawable(draw
->dri_drawable
, draw
))
1959 back
= dri3_alloc_render_buffer(draw
, draw
->back_format
,
1960 draw
->width
, draw
->height
, draw
->depth
);
1965 draw
->buffers
[id
] = back
;
1967 /* If necessary, prefill the back with data according to swap_method mode. */
1968 if (draw
->cur_blit_source
!= -1 &&
1969 draw
->buffers
[draw
->cur_blit_source
] &&
1970 back
!= draw
->buffers
[draw
->cur_blit_source
]) {
1971 struct loader_dri3_buffer
*source
= draw
->buffers
[draw
->cur_blit_source
];
1973 dri3_fence_await(draw
->conn
, draw
, source
);
1974 dri3_fence_await(draw
->conn
, draw
, back
);
1975 (void) loader_dri3_blit_image(draw
,
1978 0, 0, draw
->width
, draw
->height
,
1980 back
->last_swap
= source
->last_swap
;
1981 draw
->cur_blit_source
= -1;