2 * Copyright © 2013 Keith Packard
3 * Copyright © 2015 Boyan Ding
5 * Permission to use, copy, modify, distribute, and sell this software and its
6 * documentation for any purpose is hereby granted without fee, provided that
7 * the above copyright notice appear in all copies and that both that copyright
8 * notice and this permission notice appear in supporting documentation, and
9 * that the name of the copyright holders not be used in advertising or
10 * publicity pertaining to distribution of the software without specific,
11 * written prior permission. The copyright holders make no representations
12 * about the suitability of this software for any purpose. It is provided "as
13 * is" without express or implied warranty.
15 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
16 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
17 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
18 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
19 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
20 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
28 #include <X11/xshmfence.h>
31 #include <xcb/present.h>
33 #include <X11/Xlib-xcb.h>
35 #include "loader_dri3_helper.h"
37 /* From xmlpool/options.h, user exposed so should be stable */
38 #define DRI_CONF_VBLANK_NEVER 0
39 #define DRI_CONF_VBLANK_DEF_INTERVAL_0 1
40 #define DRI_CONF_VBLANK_DEF_INTERVAL_1 2
41 #define DRI_CONF_VBLANK_ALWAYS_SYNC 3
44 dri3_fence_reset(xcb_connection_t
*c
, struct loader_dri3_buffer
*buffer
)
46 xshmfence_reset(buffer
->shm_fence
);
50 dri3_fence_set(struct loader_dri3_buffer
*buffer
)
52 xshmfence_trigger(buffer
->shm_fence
);
56 dri3_fence_trigger(xcb_connection_t
*c
, struct loader_dri3_buffer
*buffer
)
58 xcb_sync_trigger_fence(c
, buffer
->sync_fence
);
62 dri3_fence_await(xcb_connection_t
*c
, struct loader_dri3_buffer
*buffer
)
65 xshmfence_await(buffer
->shm_fence
);
69 dri3_update_num_back(struct loader_dri3_drawable
*draw
)
78 loader_dri3_set_swap_interval(struct loader_dri3_drawable
*draw
, int interval
)
80 draw
->swap_interval
= interval
;
81 dri3_update_num_back(draw
);
84 /** dri3_free_render_buffer
86 * Free everything associated with one render buffer including pixmap, fence
87 * stuff and the driver image
90 dri3_free_render_buffer(struct loader_dri3_drawable
*draw
,
91 struct loader_dri3_buffer
*buffer
)
93 if (buffer
->own_pixmap
)
94 xcb_free_pixmap(draw
->conn
, buffer
->pixmap
);
95 xcb_sync_destroy_fence(draw
->conn
, buffer
->sync_fence
);
96 xshmfence_unmap_shm(buffer
->shm_fence
);
97 draw
->ext
->image
->destroyImage(buffer
->image
);
98 if (buffer
->linear_buffer
)
99 draw
->ext
->image
->destroyImage(buffer
->linear_buffer
);
104 loader_dri3_drawable_fini(struct loader_dri3_drawable
*draw
)
108 draw
->ext
->core
->destroyDrawable(draw
->dri_drawable
);
110 for (i
= 0; i
< LOADER_DRI3_NUM_BUFFERS
; i
++) {
111 if (draw
->buffers
[i
])
112 dri3_free_render_buffer(draw
, draw
->buffers
[i
]);
115 if (draw
->special_event
) {
116 xcb_void_cookie_t cookie
=
117 xcb_present_select_input_checked(draw
->conn
, draw
->eid
, draw
->drawable
,
118 XCB_PRESENT_EVENT_MASK_NO_EVENT
);
120 xcb_discard_reply(draw
->conn
, cookie
.sequence
);
121 xcb_unregister_for_special_event(draw
->conn
, draw
->special_event
);
126 loader_dri3_drawable_init(xcb_connection_t
*conn
,
127 xcb_drawable_t drawable
,
128 __DRIscreen
*dri_screen
,
129 bool is_different_gpu
,
130 const __DRIconfig
*dri_config
,
131 struct loader_dri3_extensions
*ext
,
132 const struct loader_dri3_vtable
*vtable
,
133 struct loader_dri3_drawable
*draw
)
135 xcb_get_geometry_cookie_t cookie
;
136 xcb_get_geometry_reply_t
*reply
;
137 xcb_generic_error_t
*error
;
138 GLint vblank_mode
= DRI_CONF_VBLANK_DEF_INTERVAL_1
;
143 draw
->vtable
= vtable
;
144 draw
->drawable
= drawable
;
145 draw
->dri_screen
= dri_screen
;
146 draw
->is_different_gpu
= is_different_gpu
;
149 draw
->have_fake_front
= 0;
150 draw
->first_init
= true;
152 if (draw
->ext
->config
)
153 draw
->ext
->config
->configQueryi(draw
->dri_screen
,
154 "vblank_mode", &vblank_mode
);
156 switch (vblank_mode
) {
157 case DRI_CONF_VBLANK_NEVER
:
158 case DRI_CONF_VBLANK_DEF_INTERVAL_0
:
161 case DRI_CONF_VBLANK_DEF_INTERVAL_1
:
162 case DRI_CONF_VBLANK_ALWAYS_SYNC
:
167 draw
->swap_interval
= swap_interval
;
169 dri3_update_num_back(draw
);
171 /* Create a new drawable */
173 draw
->ext
->image_driver
->createNewDrawable(dri_screen
,
177 if (!draw
->dri_drawable
)
180 cookie
= xcb_get_geometry(draw
->conn
, draw
->drawable
);
181 reply
= xcb_get_geometry_reply(draw
->conn
, cookie
, &error
);
182 if (reply
== NULL
|| error
!= NULL
) {
183 draw
->ext
->core
->destroyDrawable(draw
->dri_drawable
);
187 draw
->width
= reply
->width
;
188 draw
->height
= reply
->height
;
189 draw
->depth
= reply
->depth
;
190 draw
->vtable
->set_drawable_size(draw
, draw
->width
, draw
->height
);
194 * Make sure server has the same swap interval we do for the new
197 loader_dri3_set_swap_interval(draw
, swap_interval
);
203 * Process one Present event
206 dri3_handle_present_event(struct loader_dri3_drawable
*draw
,
207 xcb_present_generic_event_t
*ge
)
209 switch (ge
->evtype
) {
210 case XCB_PRESENT_CONFIGURE_NOTIFY
: {
211 xcb_present_configure_notify_event_t
*ce
= (void *) ge
;
213 draw
->width
= ce
->width
;
214 draw
->height
= ce
->height
;
215 draw
->vtable
->set_drawable_size(draw
, draw
->width
, draw
->height
);
218 case XCB_PRESENT_COMPLETE_NOTIFY
: {
219 xcb_present_complete_notify_event_t
*ce
= (void *) ge
;
221 /* Compute the processed SBC number from the received 32-bit serial number
222 * merged with the upper 32-bits of the sent 64-bit serial number while
225 if (ce
->kind
== XCB_PRESENT_COMPLETE_KIND_PIXMAP
) {
226 draw
->recv_sbc
= (draw
->send_sbc
& 0xffffffff00000000LL
) | ce
->serial
;
227 if (draw
->recv_sbc
> draw
->send_sbc
)
228 draw
->recv_sbc
-= 0x100000000;
230 case XCB_PRESENT_COMPLETE_MODE_FLIP
:
231 draw
->flipping
= true;
233 case XCB_PRESENT_COMPLETE_MODE_COPY
:
234 draw
->flipping
= false;
237 dri3_update_num_back(draw
);
239 if (draw
->vtable
->show_fps
)
240 draw
->vtable
->show_fps(draw
, ce
->ust
);
245 draw
->recv_msc_serial
= ce
->serial
;
246 draw
->notify_ust
= ce
->ust
;
247 draw
->notify_msc
= ce
->msc
;
251 case XCB_PRESENT_EVENT_IDLE_NOTIFY
: {
252 xcb_present_idle_notify_event_t
*ie
= (void *) ge
;
255 for (b
= 0; b
< sizeof(draw
->buffers
) / sizeof(draw
->buffers
[0]); b
++) {
256 struct loader_dri3_buffer
*buf
= draw
->buffers
[b
];
258 if (buf
&& buf
->pixmap
== ie
->pixmap
) {
260 if (draw
->num_back
<= b
&& b
< LOADER_DRI3_MAX_BACK
) {
261 dri3_free_render_buffer(draw
, buf
);
262 draw
->buffers
[b
] = NULL
;
274 dri3_wait_for_event(struct loader_dri3_drawable
*draw
)
276 xcb_generic_event_t
*ev
;
277 xcb_present_generic_event_t
*ge
;
279 xcb_flush(draw
->conn
);
280 ev
= xcb_wait_for_special_event(draw
->conn
, draw
->special_event
);
284 dri3_handle_present_event(draw
, ge
);
288 /** loader_dri3_wait_for_msc
290 * Get the X server to send an event when the target msc/divisor/remainder is
294 loader_dri3_wait_for_msc(struct loader_dri3_drawable
*draw
,
296 int64_t divisor
, int64_t remainder
,
297 int64_t *ust
, int64_t *msc
, int64_t *sbc
)
301 msc_serial
= ++draw
->send_msc_serial
;
302 xcb_present_notify_msc(draw
->conn
,
309 xcb_flush(draw
->conn
);
311 /* Wait for the event */
312 if (draw
->special_event
) {
313 while ((int32_t) (msc_serial
- draw
->recv_msc_serial
) > 0) {
314 if (!dri3_wait_for_event(draw
))
319 *ust
= draw
->notify_ust
;
320 *msc
= draw
->notify_msc
;
321 *sbc
= draw
->recv_sbc
;
326 /** loader_dri3_wait_for_sbc
328 * Wait for the completed swap buffer count to reach the specified
329 * target. Presumably the application knows that this will be reached with
330 * outstanding complete events, or we're going to be here awhile.
333 loader_dri3_wait_for_sbc(struct loader_dri3_drawable
*draw
,
334 int64_t target_sbc
, int64_t *ust
,
335 int64_t *msc
, int64_t *sbc
)
337 /* From the GLX_OML_sync_control spec:
339 * "If <target_sbc> = 0, the function will block until all previous
340 * swaps requested with glXSwapBuffersMscOML for that window have
344 target_sbc
= draw
->send_sbc
;
346 while (draw
->recv_sbc
< target_sbc
) {
347 if (!dri3_wait_for_event(draw
))
353 *sbc
= draw
->recv_sbc
;
357 /** loader_dri3_find_back
359 * Find an idle back buffer. If there isn't one, then
360 * wait for a present idle notify event from the X server
363 dri3_find_back(struct loader_dri3_drawable
*draw
)
366 xcb_generic_event_t
*ev
;
367 xcb_present_generic_event_t
*ge
;
370 for (b
= 0; b
< draw
->num_back
; b
++) {
371 int id
= LOADER_DRI3_BACK_ID((b
+ draw
->cur_back
) % draw
->num_back
);
372 struct loader_dri3_buffer
*buffer
= draw
->buffers
[id
];
374 if (!buffer
|| !buffer
->busy
) {
379 xcb_flush(draw
->conn
);
380 ev
= xcb_wait_for_special_event(draw
->conn
, draw
->special_event
);
384 dri3_handle_present_event(draw
, ge
);
388 static xcb_gcontext_t
389 dri3_drawable_gc(struct loader_dri3_drawable
*draw
)
393 xcb_create_gc(draw
->conn
,
394 (draw
->gc
= xcb_generate_id(draw
->conn
)),
396 XCB_GC_GRAPHICS_EXPOSURES
,
403 static struct loader_dri3_buffer
*
404 dri3_back_buffer(struct loader_dri3_drawable
*draw
)
406 return draw
->buffers
[LOADER_DRI3_BACK_ID(draw
->cur_back
)];
409 static struct loader_dri3_buffer
*
410 dri3_fake_front_buffer(struct loader_dri3_drawable
*draw
)
412 return draw
->buffers
[LOADER_DRI3_FRONT_ID
];
416 dri3_copy_area(xcb_connection_t
*c
,
417 xcb_drawable_t src_drawable
,
418 xcb_drawable_t dst_drawable
,
427 xcb_void_cookie_t cookie
;
429 cookie
= xcb_copy_area_checked(c
,
439 xcb_discard_reply(c
, cookie
.sequence
);
443 * Asks the driver to flush any queued work necessary for serializing with the
444 * X command stream, and optionally the slightly more strict requirement of
445 * glFlush() equivalence (which would require flushing even if nothing had
446 * been drawn to a window system framebuffer, for example).
449 loader_dri3_flush(struct loader_dri3_drawable
*draw
,
451 enum __DRI2throttleReason throttle_reason
)
453 /* NEED TO CHECK WHETHER CONTEXT IS NULL */
454 __DRIcontext
*dri_context
= draw
->vtable
->get_dri_context(draw
);
457 draw
->ext
->flush
->flush_with_flags(dri_context
, draw
->dri_drawable
,
458 flags
, throttle_reason
);
463 loader_dri3_copy_sub_buffer(struct loader_dri3_drawable
*draw
,
465 int width
, int height
,
468 struct loader_dri3_buffer
*back
;
469 unsigned flags
= __DRI2_FLUSH_DRAWABLE
;
470 __DRIcontext
*dri_context
;
472 dri_context
= draw
->vtable
->get_dri_context(draw
);
474 /* Check we have the right attachments */
475 if (!draw
->have_back
|| draw
->is_pixmap
)
479 flags
|= __DRI2_FLUSH_CONTEXT
;
480 loader_dri3_flush(draw
, flags
, __DRI2_THROTTLE_SWAPBUFFER
);
482 back
= dri3_back_buffer(draw
);
483 y
= draw
->height
- y
- height
;
485 if (draw
->is_different_gpu
&& draw
->vtable
->in_current_context(draw
)) {
486 /* Update the linear buffer part of the back buffer
487 * for the dri3_copy_area operation
489 draw
->ext
->image
->blitImage(dri_context
,
495 back
->height
, __BLIT_FLAG_FLUSH
);
496 /* We use blitImage to update our fake front,
498 if (draw
->have_fake_front
)
499 draw
->ext
->image
->blitImage(dri_context
,
500 dri3_fake_front_buffer(draw
)->image
,
503 x
, y
, width
, height
, __BLIT_FLAG_FLUSH
);
506 loader_dri3_swapbuffer_barrier(draw
);
507 dri3_fence_reset(draw
->conn
, back
);
508 dri3_copy_area(draw
->conn
,
509 dri3_back_buffer(draw
)->pixmap
,
511 dri3_drawable_gc(draw
),
512 x
, y
, x
, y
, width
, height
);
513 dri3_fence_trigger(draw
->conn
, back
);
514 /* Refresh the fake front (if present) after we just damaged the real
517 if (draw
->have_fake_front
&& !draw
->is_different_gpu
) {
518 dri3_fence_reset(draw
->conn
, dri3_fake_front_buffer(draw
));
519 dri3_copy_area(draw
->conn
,
520 dri3_back_buffer(draw
)->pixmap
,
521 dri3_fake_front_buffer(draw
)->pixmap
,
522 dri3_drawable_gc(draw
),
523 x
, y
, x
, y
, width
, height
);
524 dri3_fence_trigger(draw
->conn
, dri3_fake_front_buffer(draw
));
525 dri3_fence_await(draw
->conn
, dri3_fake_front_buffer(draw
));
527 dri3_fence_await(draw
->conn
, back
);
531 loader_dri3_copy_drawable(struct loader_dri3_drawable
*draw
,
535 loader_dri3_flush(draw
, __DRI2_FLUSH_DRAWABLE
, 0);
537 dri3_fence_reset(draw
->conn
, dri3_fake_front_buffer(draw
));
538 dri3_copy_area(draw
->conn
,
540 dri3_drawable_gc(draw
),
541 0, 0, 0, 0, draw
->width
, draw
->height
);
542 dri3_fence_trigger(draw
->conn
, dri3_fake_front_buffer(draw
));
543 dri3_fence_await(draw
->conn
, dri3_fake_front_buffer(draw
));
547 loader_dri3_wait_x(struct loader_dri3_drawable
*draw
)
549 struct loader_dri3_buffer
*front
;
550 __DRIcontext
*dri_context
;
552 if (draw
== NULL
|| !draw
->have_fake_front
)
555 front
= dri3_fake_front_buffer(draw
);
556 dri_context
= draw
->vtable
->get_dri_context(draw
);
558 loader_dri3_copy_drawable(draw
, front
->pixmap
, draw
->drawable
);
560 /* In the psc->is_different_gpu case, the linear buffer has been updated,
561 * but not yet the tiled buffer.
562 * Copy back to the tiled buffer we use for rendering.
563 * Note that we don't need flushing.
565 if (draw
->is_different_gpu
&& draw
->vtable
->in_current_context(draw
))
566 draw
->ext
->image
->blitImage(dri_context
,
568 front
->linear_buffer
,
576 loader_dri3_wait_gl(struct loader_dri3_drawable
*draw
)
578 struct loader_dri3_buffer
*front
;
579 __DRIcontext
*dri_context
;
581 if (draw
== NULL
|| !draw
->have_fake_front
)
584 front
= dri3_fake_front_buffer(draw
);
585 dri_context
= draw
->vtable
->get_dri_context(draw
);
587 /* In the psc->is_different_gpu case, we update the linear_buffer
588 * before updating the real front.
590 if (draw
->is_different_gpu
&& draw
->vtable
->in_current_context(draw
))
591 draw
->ext
->image
->blitImage(dri_context
,
592 front
->linear_buffer
,
597 front
->height
, __BLIT_FLAG_FLUSH
);
598 loader_dri3_swapbuffer_barrier(draw
);
599 loader_dri3_copy_drawable(draw
, draw
->drawable
, front
->pixmap
);
602 /** dri3_flush_present_events
604 * Process any present events that have been received from the X server
607 dri3_flush_present_events(struct loader_dri3_drawable
*draw
)
609 /* Check to see if any configuration changes have occurred
610 * since we were last invoked
612 if (draw
->special_event
) {
613 xcb_generic_event_t
*ev
;
615 while ((ev
= xcb_poll_for_special_event(draw
->conn
,
616 draw
->special_event
)) != NULL
) {
617 xcb_present_generic_event_t
*ge
= (void *) ev
;
618 dri3_handle_present_event(draw
, ge
);
623 /** loader_dri3_swap_buffers_msc
625 * Make the current back buffer visible using the present extension
628 loader_dri3_swap_buffers_msc(struct loader_dri3_drawable
*draw
,
629 int64_t target_msc
, int64_t divisor
,
630 int64_t remainder
, unsigned flush_flags
,
633 struct loader_dri3_buffer
*back
;
634 __DRIcontext
*dri_context
;
636 uint32_t options
= XCB_PRESENT_OPTION_NONE
;
638 dri_context
= draw
->vtable
->get_dri_context(draw
);
640 draw
->vtable
->flush_drawable(draw
, flush_flags
);
642 back
= draw
->buffers
[dri3_find_back(draw
)];
643 if (draw
->is_different_gpu
&& back
) {
644 /* Update the linear buffer before presenting the pixmap */
645 draw
->ext
->image
->blitImage(dri_context
,
651 back
->height
, __BLIT_FLAG_FLUSH
);
652 /* Update the fake front */
653 if (draw
->have_fake_front
)
654 draw
->ext
->image
->blitImage(dri_context
,
655 draw
->buffers
[LOADER_DRI3_FRONT_ID
]->image
,
657 0, 0, draw
->width
, draw
->height
,
658 0, 0, draw
->width
, draw
->height
,
662 dri3_flush_present_events(draw
);
664 if (back
&& !draw
->is_pixmap
) {
665 dri3_fence_reset(draw
->conn
, back
);
667 /* Compute when we want the frame shown by taking the last known
668 * successful MSC and adding in a swap interval for each outstanding swap
669 * request. target_msc=divisor=remainder=0 means "Use glXSwapBuffers()
673 if (target_msc
== 0 && divisor
== 0 && remainder
== 0)
674 target_msc
= draw
->msc
+ draw
->swap_interval
*
675 (draw
->send_sbc
- draw
->recv_sbc
);
676 else if (divisor
== 0 && remainder
> 0) {
677 /* From the GLX_OML_sync_control spec:
678 * "If <divisor> = 0, the swap will occur when MSC becomes
679 * greater than or equal to <target_msc>."
681 * Note that there's no mention of the remainder. The Present
682 * extension throws BadValue for remainder != 0 with divisor == 0, so
683 * just drop the passed in value.
688 /* From the GLX_EXT_swap_control spec
689 * and the EGL 1.4 spec (page 53):
691 * "If <interval> is set to a value of 0, buffer swaps are not
692 * synchronized to a video frame."
694 * Implementation note: It is possible to enable triple buffering
695 * behaviour by not using XCB_PRESENT_OPTION_ASYNC, but this should not be
698 if (draw
->swap_interval
== 0)
699 options
|= XCB_PRESENT_OPTION_ASYNC
;
701 options
|= XCB_PRESENT_OPTION_COPY
;
704 back
->last_swap
= draw
->send_sbc
;
705 xcb_present_pixmap(draw
->conn
,
708 (uint32_t) draw
->send_sbc
,
713 None
, /* target_crtc */
720 ret
= (int64_t) draw
->send_sbc
;
722 /* If there's a fake front, then copy the source back buffer
723 * to the fake front to keep it up to date. This needs
724 * to reset the fence and make future users block until
725 * the X server is done copying the bits
727 if (draw
->have_fake_front
&& !draw
->is_different_gpu
) {
728 dri3_fence_reset(draw
->conn
, draw
->buffers
[LOADER_DRI3_FRONT_ID
]);
729 dri3_copy_area(draw
->conn
,
731 draw
->buffers
[LOADER_DRI3_FRONT_ID
]->pixmap
,
732 dri3_drawable_gc(draw
),
734 draw
->width
, draw
->height
);
735 dri3_fence_trigger(draw
->conn
, draw
->buffers
[LOADER_DRI3_FRONT_ID
]);
737 xcb_flush(draw
->conn
);
742 draw
->ext
->flush
->invalidate(draw
->dri_drawable
);
748 loader_dri3_query_buffer_age(struct loader_dri3_drawable
*draw
)
750 int back_id
= LOADER_DRI3_BACK_ID(dri3_find_back(draw
));
752 if (back_id
< 0 || !draw
->buffers
[back_id
])
755 if (draw
->buffers
[back_id
]->last_swap
!= 0)
756 return draw
->send_sbc
- draw
->buffers
[back_id
]->last_swap
+ 1;
763 * Wrapper around xcb_dri3_open
766 loader_dri3_open(xcb_connection_t
*conn
,
770 xcb_dri3_open_cookie_t cookie
;
771 xcb_dri3_open_reply_t
*reply
;
774 cookie
= xcb_dri3_open(conn
,
778 reply
= xcb_dri3_open_reply(conn
, cookie
, NULL
);
782 if (reply
->nfd
!= 1) {
787 fd
= xcb_dri3_open_reply_fds(conn
, reply
)[0];
789 fcntl(fd
, F_SETFD
, fcntl(fd
, F_GETFD
) | FD_CLOEXEC
);
795 dri3_cpp_for_format(uint32_t format
) {
797 case __DRI_IMAGE_FORMAT_R8
:
799 case __DRI_IMAGE_FORMAT_RGB565
:
800 case __DRI_IMAGE_FORMAT_GR88
:
802 case __DRI_IMAGE_FORMAT_XRGB8888
:
803 case __DRI_IMAGE_FORMAT_ARGB8888
:
804 case __DRI_IMAGE_FORMAT_ABGR8888
:
805 case __DRI_IMAGE_FORMAT_XBGR8888
:
806 case __DRI_IMAGE_FORMAT_XRGB2101010
:
807 case __DRI_IMAGE_FORMAT_ARGB2101010
:
808 case __DRI_IMAGE_FORMAT_SARGB8
:
810 case __DRI_IMAGE_FORMAT_NONE
:
816 /** loader_dri3_alloc_render_buffer
818 * Use the driver createImage function to construct a __DRIimage, then
819 * get a file descriptor for that and create an X pixmap from that
821 * Allocate an xshmfence for synchronization
823 static struct loader_dri3_buffer
*
824 dri3_alloc_render_buffer(struct loader_dri3_drawable
*draw
, unsigned int format
,
825 int width
, int height
, int depth
)
827 struct loader_dri3_buffer
*buffer
;
828 __DRIimage
*pixmap_buffer
;
830 xcb_sync_fence_t sync_fence
;
831 struct xshmfence
*shm_fence
;
832 int buffer_fd
, fence_fd
;
835 /* Create an xshmfence object and
836 * prepare to send that to the X server
839 fence_fd
= xshmfence_alloc_shm();
843 shm_fence
= xshmfence_map_shm(fence_fd
);
844 if (shm_fence
== NULL
)
847 /* Allocate the image from the driver
849 buffer
= calloc(1, sizeof *buffer
);
853 buffer
->cpp
= dri3_cpp_for_format(format
);
857 if (!draw
->is_different_gpu
) {
858 buffer
->image
= draw
->ext
->image
->createImage(draw
->dri_screen
,
861 __DRI_IMAGE_USE_SHARE
|
862 __DRI_IMAGE_USE_SCANOUT
|
863 __DRI_IMAGE_USE_BACKBUFFER
,
865 pixmap_buffer
= buffer
->image
;
870 buffer
->image
= draw
->ext
->image
->createImage(draw
->dri_screen
,
879 buffer
->linear_buffer
=
880 draw
->ext
->image
->createImage(draw
->dri_screen
,
881 width
, height
, format
,
882 __DRI_IMAGE_USE_SHARE
|
883 __DRI_IMAGE_USE_LINEAR
|
884 __DRI_IMAGE_USE_BACKBUFFER
,
886 pixmap_buffer
= buffer
->linear_buffer
;
888 if (!buffer
->linear_buffer
)
889 goto no_linear_buffer
;
892 /* X wants the stride, so ask the image for it
894 if (!draw
->ext
->image
->queryImage(pixmap_buffer
, __DRI_IMAGE_ATTRIB_STRIDE
,
896 goto no_buffer_attrib
;
898 buffer
->pitch
= stride
;
900 if (!draw
->ext
->image
->queryImage(pixmap_buffer
, __DRI_IMAGE_ATTRIB_FD
,
902 goto no_buffer_attrib
;
904 xcb_dri3_pixmap_from_buffer(draw
->conn
,
905 (pixmap
= xcb_generate_id(draw
->conn
)),
908 width
, height
, buffer
->pitch
,
909 depth
, buffer
->cpp
* 8,
912 xcb_dri3_fence_from_fd(draw
->conn
,
914 (sync_fence
= xcb_generate_id(draw
->conn
)),
918 buffer
->pixmap
= pixmap
;
919 buffer
->own_pixmap
= true;
920 buffer
->sync_fence
= sync_fence
;
921 buffer
->shm_fence
= shm_fence
;
922 buffer
->width
= width
;
923 buffer
->height
= height
;
925 /* Mark the buffer as idle
927 dri3_fence_set(buffer
);
932 draw
->ext
->image
->destroyImage(pixmap_buffer
);
934 if (draw
->is_different_gpu
)
935 draw
->ext
->image
->destroyImage(buffer
->image
);
939 xshmfence_unmap_shm(shm_fence
);
945 /** loader_dri3_update_drawable
947 * Called the first time we use the drawable and then
948 * after we receive present configure notify events to
949 * track the geometry of the drawable
952 dri3_update_drawable(__DRIdrawable
*driDrawable
,
953 struct loader_dri3_drawable
*draw
)
955 if (draw
->first_init
) {
956 xcb_get_geometry_cookie_t geom_cookie
;
957 xcb_get_geometry_reply_t
*geom_reply
;
958 xcb_void_cookie_t cookie
;
959 xcb_generic_error_t
*error
;
960 xcb_present_query_capabilities_cookie_t present_capabilities_cookie
;
961 xcb_present_query_capabilities_reply_t
*present_capabilities_reply
;
963 draw
->first_init
= false;
965 /* Try to select for input on the window.
967 * If the drawable is a window, this will get our events
970 * Otherwise, we'll get a BadWindow error back from this request which
971 * will let us know that the drawable is a pixmap instead.
974 draw
->eid
= xcb_generate_id(draw
->conn
);
976 xcb_present_select_input_checked(draw
->conn
, draw
->eid
, draw
->drawable
,
977 XCB_PRESENT_EVENT_MASK_CONFIGURE_NOTIFY
|
978 XCB_PRESENT_EVENT_MASK_COMPLETE_NOTIFY
|
979 XCB_PRESENT_EVENT_MASK_IDLE_NOTIFY
);
981 present_capabilities_cookie
=
982 xcb_present_query_capabilities(draw
->conn
, draw
->drawable
);
984 /* Create an XCB event queue to hold present events outside of the usual
985 * application event queue
987 draw
->special_event
= xcb_register_for_special_xge(draw
->conn
,
991 geom_cookie
= xcb_get_geometry(draw
->conn
, draw
->drawable
);
993 geom_reply
= xcb_get_geometry_reply(draw
->conn
, geom_cookie
, NULL
);
998 draw
->width
= geom_reply
->width
;
999 draw
->height
= geom_reply
->height
;
1000 draw
->depth
= geom_reply
->depth
;
1001 draw
->vtable
->set_drawable_size(draw
, draw
->width
, draw
->height
);
1005 draw
->is_pixmap
= false;
1007 /* Check to see if our select input call failed. If it failed with a
1008 * BadWindow error, then assume the drawable is a pixmap. Destroy the
1009 * special event queue created above and mark the drawable as a pixmap
1012 error
= xcb_request_check(draw
->conn
, cookie
);
1014 present_capabilities_reply
=
1015 xcb_present_query_capabilities_reply(draw
->conn
,
1016 present_capabilities_cookie
,
1019 if (present_capabilities_reply
) {
1020 draw
->present_capabilities
= present_capabilities_reply
->capabilities
;
1021 free(present_capabilities_reply
);
1023 draw
->present_capabilities
= 0;
1026 if (error
->error_code
!= BadWindow
) {
1030 draw
->is_pixmap
= true;
1031 xcb_unregister_for_special_event(draw
->conn
, draw
->special_event
);
1032 draw
->special_event
= NULL
;
1035 dri3_flush_present_events(draw
);
1039 /* the DRIimage createImage function takes __DRI_IMAGE_FORMAT codes, while
1040 * the createImageFromFds call takes __DRI_IMAGE_FOURCC codes. To avoid
1041 * complete confusion, just deal in __DRI_IMAGE_FORMAT codes for now and
1042 * translate to __DRI_IMAGE_FOURCC codes in the call to createImageFromFds
1045 image_format_to_fourcc(int format
)
1048 /* Convert from __DRI_IMAGE_FORMAT to __DRI_IMAGE_FOURCC (sigh) */
1050 case __DRI_IMAGE_FORMAT_SARGB8
: return __DRI_IMAGE_FOURCC_SARGB8888
;
1051 case __DRI_IMAGE_FORMAT_RGB565
: return __DRI_IMAGE_FOURCC_RGB565
;
1052 case __DRI_IMAGE_FORMAT_XRGB8888
: return __DRI_IMAGE_FOURCC_XRGB8888
;
1053 case __DRI_IMAGE_FORMAT_ARGB8888
: return __DRI_IMAGE_FOURCC_ARGB8888
;
1054 case __DRI_IMAGE_FORMAT_ABGR8888
: return __DRI_IMAGE_FOURCC_ABGR8888
;
1055 case __DRI_IMAGE_FORMAT_XBGR8888
: return __DRI_IMAGE_FOURCC_XBGR8888
;
1061 loader_dri3_create_image(xcb_connection_t
*c
,
1062 xcb_dri3_buffer_from_pixmap_reply_t
*bp_reply
,
1063 unsigned int format
,
1064 __DRIscreen
*dri_screen
,
1065 const __DRIimageExtension
*image
,
1066 void *loaderPrivate
)
1069 __DRIimage
*image_planar
, *ret
;
1072 /* Get an FD for the pixmap object
1074 fds
= xcb_dri3_buffer_from_pixmap_reply_fds(c
, bp_reply
);
1076 stride
= bp_reply
->stride
;
1079 /* createImageFromFds creates a wrapper __DRIimage structure which
1080 * can deal with multiple planes for things like Yuv images. So, once
1081 * we've gotten the planar wrapper, pull the single plane out of it and
1082 * discard the wrapper.
1084 image_planar
= image
->createImageFromFds(dri_screen
,
1087 image_format_to_fourcc(format
),
1089 &stride
, &offset
, loaderPrivate
);
1094 ret
= image
->fromPlanar(image_planar
, 0, loaderPrivate
);
1096 image
->destroyImage(image_planar
);
1101 /** dri3_get_pixmap_buffer
1103 * Get the DRM object for a pixmap from the X server and
1104 * wrap that with a __DRIimage structure using createImageFromFds
1106 static struct loader_dri3_buffer
*
1107 dri3_get_pixmap_buffer(__DRIdrawable
*driDrawable
, unsigned int format
,
1108 enum loader_dri3_buffer_type buffer_type
,
1109 struct loader_dri3_drawable
*draw
)
1111 int buf_id
= loader_dri3_pixmap_buf_id(buffer_type
);
1112 struct loader_dri3_buffer
*buffer
= draw
->buffers
[buf_id
];
1113 xcb_drawable_t pixmap
;
1114 xcb_dri3_buffer_from_pixmap_cookie_t bp_cookie
;
1115 xcb_dri3_buffer_from_pixmap_reply_t
*bp_reply
;
1116 xcb_sync_fence_t sync_fence
;
1117 struct xshmfence
*shm_fence
;
1123 pixmap
= draw
->drawable
;
1125 buffer
= calloc(1, sizeof *buffer
);
1129 fence_fd
= xshmfence_alloc_shm();
1132 shm_fence
= xshmfence_map_shm(fence_fd
);
1133 if (shm_fence
== NULL
) {
1138 xcb_dri3_fence_from_fd(draw
->conn
,
1140 (sync_fence
= xcb_generate_id(draw
->conn
)),
1144 bp_cookie
= xcb_dri3_buffer_from_pixmap(draw
->conn
, pixmap
);
1145 bp_reply
= xcb_dri3_buffer_from_pixmap_reply(draw
->conn
, bp_cookie
, NULL
);
1149 buffer
->image
= loader_dri3_create_image(draw
->conn
, bp_reply
, format
,
1150 draw
->dri_screen
, draw
->ext
->image
,
1155 buffer
->pixmap
= pixmap
;
1156 buffer
->own_pixmap
= false;
1157 buffer
->width
= bp_reply
->width
;
1158 buffer
->height
= bp_reply
->height
;
1159 buffer
->buffer_type
= buffer_type
;
1160 buffer
->shm_fence
= shm_fence
;
1161 buffer
->sync_fence
= sync_fence
;
1163 draw
->buffers
[buf_id
] = buffer
;
1171 xcb_sync_destroy_fence(draw
->conn
, sync_fence
);
1172 xshmfence_unmap_shm(shm_fence
);
1181 * Find a front or back buffer, allocating new ones as necessary
1183 static struct loader_dri3_buffer
*
1184 dri3_get_buffer(__DRIdrawable
*driDrawable
,
1185 unsigned int format
,
1186 enum loader_dri3_buffer_type buffer_type
,
1187 struct loader_dri3_drawable
*draw
)
1189 struct loader_dri3_buffer
*buffer
;
1191 __DRIcontext
*dri_context
;
1193 dri_context
= draw
->vtable
->get_dri_context(draw
);
1195 if (buffer_type
== loader_dri3_buffer_back
) {
1196 buf_id
= dri3_find_back(draw
);
1201 buf_id
= LOADER_DRI3_FRONT_ID
;
1204 buffer
= draw
->buffers
[buf_id
];
1206 /* Allocate a new buffer if there isn't an old one, or if that
1207 * old one is the wrong size
1209 if (!buffer
|| buffer
->width
!= draw
->width
||
1210 buffer
->height
!= draw
->height
) {
1211 struct loader_dri3_buffer
*new_buffer
;
1213 /* Allocate the new buffers
1215 new_buffer
= dri3_alloc_render_buffer(draw
,
1223 /* When resizing, copy the contents of the old buffer, waiting for that
1224 * copy to complete using our fences before proceeding
1226 switch (buffer_type
) {
1227 case loader_dri3_buffer_back
:
1229 if (!buffer
->linear_buffer
) {
1230 dri3_fence_reset(draw
->conn
, new_buffer
);
1231 dri3_fence_await(draw
->conn
, buffer
);
1232 dri3_copy_area(draw
->conn
,
1235 dri3_drawable_gc(draw
),
1237 draw
->width
, draw
->height
);
1238 dri3_fence_trigger(draw
->conn
, new_buffer
);
1239 } else if (draw
->vtable
->in_current_context(draw
)) {
1240 draw
->ext
->image
->blitImage(dri_context
,
1243 0, 0, draw
->width
, draw
->height
,
1244 0, 0, draw
->width
, draw
->height
, 0);
1246 dri3_free_render_buffer(draw
, buffer
);
1249 case loader_dri3_buffer_front
:
1250 loader_dri3_swapbuffer_barrier(draw
);
1251 dri3_fence_reset(draw
->conn
, new_buffer
);
1252 dri3_copy_area(draw
->conn
,
1255 dri3_drawable_gc(draw
),
1257 draw
->width
, draw
->height
);
1258 dri3_fence_trigger(draw
->conn
, new_buffer
);
1260 if (new_buffer
->linear_buffer
&&
1261 draw
->vtable
->in_current_context(draw
)) {
1262 dri3_fence_await(draw
->conn
, new_buffer
);
1263 draw
->ext
->image
->blitImage(dri_context
,
1265 new_buffer
->linear_buffer
,
1266 0, 0, draw
->width
, draw
->height
,
1267 0, 0, draw
->width
, draw
->height
, 0);
1271 buffer
= new_buffer
;
1272 buffer
->buffer_type
= buffer_type
;
1273 draw
->buffers
[buf_id
] = buffer
;
1275 dri3_fence_await(draw
->conn
, buffer
);
1277 /* Return the requested buffer */
1281 /** dri3_free_buffers
1283 * Free the front bufffer or all of the back buffers. Used
1284 * when the application changes which buffers it needs
1287 dri3_free_buffers(__DRIdrawable
*driDrawable
,
1288 enum loader_dri3_buffer_type buffer_type
,
1289 struct loader_dri3_drawable
*draw
)
1291 struct loader_dri3_buffer
*buffer
;
1296 switch (buffer_type
) {
1297 case loader_dri3_buffer_back
:
1298 first_id
= LOADER_DRI3_BACK_ID(0);
1299 n_id
= LOADER_DRI3_MAX_BACK
;
1301 case loader_dri3_buffer_front
:
1302 first_id
= LOADER_DRI3_FRONT_ID
;
1306 for (buf_id
= first_id
; buf_id
< first_id
+ n_id
; buf_id
++) {
1307 buffer
= draw
->buffers
[buf_id
];
1309 dri3_free_render_buffer(draw
, buffer
);
1310 draw
->buffers
[buf_id
] = NULL
;
1315 /** loader_dri3_get_buffers
1317 * The published buffer allocation API.
1318 * Returns all of the necessary buffers, allocating
1322 loader_dri3_get_buffers(__DRIdrawable
*driDrawable
,
1323 unsigned int format
,
1325 void *loaderPrivate
,
1326 uint32_t buffer_mask
,
1327 struct __DRIimageList
*buffers
)
1329 struct loader_dri3_drawable
*draw
= loaderPrivate
;
1330 struct loader_dri3_buffer
*front
, *back
;
1332 buffers
->image_mask
= 0;
1333 buffers
->front
= NULL
;
1334 buffers
->back
= NULL
;
1339 if (!dri3_update_drawable(driDrawable
, draw
))
1342 /* pixmaps always have front buffers */
1343 if (draw
->is_pixmap
)
1344 buffer_mask
|= __DRI_IMAGE_BUFFER_FRONT
;
1346 if (buffer_mask
& __DRI_IMAGE_BUFFER_FRONT
) {
1347 /* All pixmaps are owned by the server gpu.
1348 * When we use a different gpu, we can't use the pixmap
1349 * as buffer since it is potentially tiled a way
1350 * our device can't understand. In this case, use
1351 * a fake front buffer. Hopefully the pixmap
1352 * content will get synced with the fake front
1355 if (draw
->is_pixmap
&& !draw
->is_different_gpu
)
1356 front
= dri3_get_pixmap_buffer(driDrawable
,
1358 loader_dri3_buffer_front
,
1361 front
= dri3_get_buffer(driDrawable
,
1363 loader_dri3_buffer_front
,
1369 dri3_free_buffers(driDrawable
, loader_dri3_buffer_front
, draw
);
1370 draw
->have_fake_front
= 0;
1373 if (buffer_mask
& __DRI_IMAGE_BUFFER_BACK
) {
1374 back
= dri3_get_buffer(driDrawable
,
1376 loader_dri3_buffer_back
,
1380 draw
->have_back
= 1;
1382 dri3_free_buffers(driDrawable
, loader_dri3_buffer_back
, draw
);
1383 draw
->have_back
= 0;
1387 buffers
->image_mask
|= __DRI_IMAGE_BUFFER_FRONT
;
1388 buffers
->front
= front
->image
;
1389 draw
->have_fake_front
= draw
->is_different_gpu
|| !draw
->is_pixmap
;
1393 buffers
->image_mask
|= __DRI_IMAGE_BUFFER_BACK
;
1394 buffers
->back
= back
->image
;
1397 draw
->stamp
= stamp
;
1402 /** loader_dri3_update_drawable_geometry
1404 * Get the current drawable geometry.
1407 loader_dri3_update_drawable_geometry(struct loader_dri3_drawable
*draw
)
1409 xcb_get_geometry_cookie_t geom_cookie
;
1410 xcb_get_geometry_reply_t
*geom_reply
;
1412 geom_cookie
= xcb_get_geometry(draw
->conn
, draw
->drawable
);
1414 geom_reply
= xcb_get_geometry_reply(draw
->conn
, geom_cookie
, NULL
);
1417 draw
->width
= geom_reply
->width
;
1418 draw
->height
= geom_reply
->height
;
1419 draw
->vtable
->set_drawable_size(draw
, draw
->width
, draw
->height
);
1427 * Make sure the server has flushed all pending swap buffers to hardware
1428 * for this drawable. Ideally we'd want to send an X protocol request to
1429 * have the server block our connection until the swaps are complete. That
1430 * would avoid the potential round-trip here.
1433 loader_dri3_swapbuffer_barrier(struct loader_dri3_drawable
*draw
)
1435 int64_t ust
, msc
, sbc
;
1437 (void) loader_dri3_wait_for_sbc(draw
, 0, &ust
, &msc
, &sbc
);