Commit graph

2287 commits

Author SHA1 Message Date
Kirill Primak
6b40e08148 compositor: introduce unified map logic 2023-06-02 17:26:18 +00:00
Simon Ser
6668c822b3 cursor: unset wlr_output_cursor.texture on surface destroy
When the surface is destroyed, its current wlr_texture is about to
get destroyed as well. Reset wlr_output_cursor.texture to prevent
use-after-free.

Closes: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3652
2023-06-02 16:27:54 +00:00
Simon Ser
9c9e3f6263 cursor: ignore wlr_cursor_set_surface() with same surface
Avoids damaging the output and rendering the cursor again if it
hasn't changed.
2023-06-02 16:27:54 +00:00
Simon Ser
5bcd537ff4 output/cursor: use new rendering API 2023-05-30 16:18:19 +00:00
Simon Ser
93a6acae9f output: add wlr_output_begin_render_pass() 2023-05-30 16:18:19 +00:00
Alexander Orzechowski
95062904c7 wlr_scene: Introduce wlr_scene_buffer_set_opacity 2023-05-30 15:43:29 +00:00
Alexander Orzechowski
2346b90a9f wlr_scene: Make scene_rect_from_node public
This is in an effort to be more consistent with both already public
getters: wlr_scene_buffer_from_node and wlr_scene_tree_from_node
2023-05-30 15:40:41 +00:00
Alexander Orzechowski
88f80c4a7c wlr_scene: Make scene_tree_from_node public
This is to allow for compositors that want to be more implicit about
how their scene is organized. Such a compositor may want to walk up
at a certain scene node to find something such as a surface to focus on.
2023-05-30 15:40:41 +00:00
Simon Ser
2c6aeed7d6 output: use pending render format if any
If a modeset contains a render format change, use that instead of
the current one stored in wlr_output.render_format.

This fixes render_bit_depth configuration not being applied without
a second modeset in Sway.
2023-05-26 16:50:58 +00:00
Alexander Orzechowski
d495fb8c04 wlr_{box, fbox}_equal: Consider empty boxes NULL 2023-05-23 17:57:16 +00:00
Simon Ser
96f3f3c92e render/pixel-format: add support for block-based formats
Some formats like sub-sampled YCbCr use a block of bytes to
store the color values for more than one pixel. Update our format
table to be able to handle such formats.
2023-05-21 20:28:45 +00:00
Simon Ser
a0ebc401d0 linux-dmabuf-v1: fix wlr_drm_format_set leak in feedback_compile()
Fixes: 43b25fd34e ("dmabuf: Remove assumption that all mods are in fallback tranche")
2023-05-18 11:20:21 +02:00
Austin Shafer
43b25fd34e dmabuf: Remove assumption that all mods are in fallback tranche
According to the spec the compositor should send scanout modifiers in
their respective device tranches, and all other texture modifiers
in the main tranche. Currently wlroots expects all modifiers to be
present in the last (i.e. "fallback") tranche, this removes that assumption
in the feedback compilation stage so that scanout modifiers for secondary
device can be advertised.

"The full-screen feedback parameters have two tranches: one with the
format/modifier pairs supported by the KMS plane, with the scanout flag
set in the tranche_flags event and with tranche_target_device set to the
KMS scan-out device; the other with the rest of the format/modifier
pairs (supported for texturing, but not for scan-out), without the
scanout flag set in the tranche_flags event, an"
2023-05-18 09:08:18 +00:00
Alexander Orzechowski
c4bed48fcc output_pick_format: Fail if no format could be chosen 2023-05-18 07:05:30 +00:00
Kirill Primak
75293d5fb0 keyboard: use the new data in wlr_keyboard_set_keymap()
Fixes: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3647
2023-05-18 08:39:24 +03:00
Simon Ser
e2647c5151 keyboard: add support for resetting the keymap 2023-05-17 22:08:34 +00:00
Simon Ser
e725f234d7 keyboard: don't change current keymap on wlr_keyboard_set_keymap() error
This function was unsetting the keymap on error. Instead, let's
leave the current keymap untouched on error.
2023-05-17 22:08:34 +00:00
Simon Ser
69aeccddb7 seat/keyboard: allow no keymap 2023-05-17 22:08:34 +00:00
Alexander Orzechowski
300bd80772 wlr_drm_format_set: Store formats on array 2023-05-11 18:25:52 +02:00
Alexander Orzechowski
90d08f8f1c wlr_drm_format: Rework wlr_drm_format_intersect
Now it takes a reference to a destination format
2023-05-11 18:24:43 +02:00
Alexander Orzechowski
340700cb70 wlr_drm_format: Change wlr_drm_format_dup to copy 2023-05-11 18:24:43 +02:00
Alexander Orzechowski
e427e019c4 wlr_drm_format: Don't take double pointer in wlr_drm_format_add 2023-05-11 03:51:01 -04:00
Alexander Orzechowski
b45396c790 wlr_drm_format: Introduce drm_format_finish 2023-05-11 03:51:01 -04:00
Simon Ser
2a1234a820 wlr-export-dmabuf-v1: handle output destroy
We were storing a wlr_output without listening for the destroy
event.

Closes: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3646
2023-05-10 20:45:48 +00:00
Alexander Orzechowski
18139f4d87 wlr_cursor: Don't multiply hotspot by scale^2
We are already multiplying in output_cursor_set_texture
2023-05-08 09:17:22 +00:00
Alexander Orzechowski
47a250ae12 wlr_cursor: Consider surface state when setting new cursor surface
Found by inspection
2023-05-06 20:55:11 +00:00
Simon Ser
d933f5204b output: drop wlr_output_cursor_set_surface 2023-05-06 13:59:05 -04:00
Simon Ser
78afce5e2d cursor: add surface handling
Only rely on wlr_output_cursor_set_texture(), because
wlr_output_cursor_set_surface() will get dropped.
2023-05-06 17:48:56 +00:00
Simon Ser
b64e7e88bf output: add output_cursor_set_texture() 2023-05-06 17:48:56 +00:00
Alexander Orzechowski
1ee75786b4 drm_format_set_union: Require initialized dst and remove assert 2023-05-04 18:19:33 +00:00
Alexander Orzechowski
ec796afb6e wlr_compositor: Decide opacity from new has_buffer flag.
`wlr_surface_get_texture` will always return NULL if the compositor was
not given a renderer.
2023-05-04 11:53:26 +02:00
Alexander Orzechowski
394accbe4a wlr_compositer: Keep track if surface has committed a buffer before.
This would break if you are running with a NULL renderer.
2023-05-04 11:53:26 +02:00
Alexander Orzechowski
cbe8876050 linux_dmabuf_v1: Use wlr_drm_format_set_union 2023-05-03 12:38:28 -04:00
Simon Ser
bf8ae8a036 output/cursor: fix buffer size when nested and scaled
The Wayland, X11 and headless backends don't really care about the
cursor size. We were picking a size identical to the texture size
in that case. This is incorrect for LoDPI cursor textures on HiDPI
outputs: in that case, we need to scale up the cursor texture.

Fixes the cursor being chopped off under the Wayland backend with
scale > 1.
2023-05-03 11:32:51 +02:00
Simon Ser
d7fcc1e96f scene: port to wlr_render_pass 2023-04-25 17:26:35 +02:00
Simon Ser
587852056c output: add wlr_output_add_software_cursors_to_render_pass()
Same as wlr_output_render_software_cursors(), but takes a
struct wlr_render_pass.
2023-04-25 17:26:34 +02:00
Simon Ser
44069dfd5e output-layer: add cropping support
Add a src_box state field. Use the SRC_* KMS props in the DRM
backend, reject the layers in the Wayland backend (for now, we can
support it later via viewporter).
2023-04-20 10:39:46 +02:00
Andri Yngvason
00489b11a0 seat: Provide dummy resources for inert seats 2023-04-18 08:29:30 +00:00
Andri Yngvason
3898bb482d seat: Let client manage its own resources
This makes seat_client resources inert when seats and/or input devices are
destroyed, rather than destroying the resources.

When the client calls e.g. wl_keyboard_release(), it's not expecting the
keyboard global to be already destroyed, so this results in an error such
as this:

    wl_display@1: error 0: invalid object 22
2023-04-18 08:29:30 +00:00
Andri Yngvason
1689a3503b wlr_seat: Extract seat_client_create() function 2023-04-18 08:29:30 +00:00
Alexander Orzechowski
eac2eaa6a9 wlr_scene: Fix potential use-after-free in wlr_scene_buffer_set_buffer
Fixes: #3636
2023-04-16 14:01:54 +02:00
Alexander Orzechowski
39be67df46 wlr_scene: Send presentation event before direct scanout output commit
We were doing it too late before and surfaces were never getting
the presentation event.
2023-04-14 22:29:24 +02:00
Simon Ser
dae2deb3c9 compositor: add wlr_surface_set_preferred_buffer_transform()
References: https://gitlab.freedesktop.org/wayland/wayland/-/merge_requests/220
2023-04-14 17:07:26 +02:00
Simon Ser
42edd36785 compositor: add wlr_surface_set_preferred_buffer_scale()
References: https://gitlab.freedesktop.org/wayland/wayland/-/merge_requests/220
2023-04-14 17:07:26 +02:00
Simon Ser
0bb574239d compositor: pass version in wlr_compositor_create
This allows wlroots to support newer versions of the interface
without breaking the API.
2023-04-14 17:07:26 +02:00
Kirill Primak
87e7584dd4 compositor: use defunct_role_object error 2023-04-14 17:04:00 +02:00
Kirill Primak
fac7a5cc9d subcompositor: use bad_parent error 2023-04-14 17:00:17 +02:00
Kirill Primak
49435cb27b subcompositor: simplify get_subsurface handler 2023-04-14 16:59:55 +02:00
Alexander Orzechowski
b1e38fc7ea output: Drop output_is_direct_scanout 2023-04-06 22:39:08 +02:00
Simon Ser
9ef98452a3 output-damage: drop
Compositors can migrate to wlr_damage_ring.
2023-04-06 20:34:30 +00:00
Simon Ser
7abda952d0 output: drop direct scan-out check in output_basic_test()
wlr_output is not well-suited to checking whether direct scan-out
is happening or not. Compositors may want to use their own external
swapchains, for instance.

Additionally, ab7eabac84 ("output: leverage
wlr_output_configure_primary_swapchain()") makes it so
output_basic_test() is called before the output swapchain is
initialized, resulting in false positives.

References: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3620
2023-04-06 21:46:45 +02:00
Simon Ser
ec5135cb09 scene: check wlr_output_is_direct_scanout_allowed() 2023-04-06 21:43:43 +02:00
Simon Ser
079ff9e6fb output: add wlr_output_is_direct_scanout_allowed()
This lets compositors check whether direct scan-out is possible.
Compositors will soon be responsible for manually calling this
function.
2023-04-06 21:42:08 +02:00
Simon Ser
835208db98 output-layer: add support for scaling buffers
This allows callers to set a destination size different from the
buffer size to scale them.

The DRM backend supports this. The Wayland backend doesn't yet
(we'd need to wire up viewporter).
2023-04-04 19:39:38 +02:00
Simon Ser
e00c4cd7dc output-layer: cache current state
The will be used by the Wayland backend to figure out whether
updating sub-surface position is necessary.
2023-03-28 22:58:29 +00:00
Kirill Primak
a3489f2c64 xdg-shell: improve unmapping logic slightly 2023-03-12 11:09:36 +00:00
Simon Ser
1b6fac4aa6 output-layer: require all layers in wlr_output_state.layers
- Simplifies the backends
- Avoids having two ways to do the same thing: previously one could
  disable a layer by either omitting it from wlr_output_state.layers,
  or by passing a NULL buffer
- We can change our mind in the future: we can allow users to omit
  some layers and define a meaning without breaking the API.

References: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/4017#note_1783997
2023-03-10 11:16:01 +00:00
Isaac Freund
87969c1c7c
xdg-decoration: send missing protocol errors 2023-03-10 11:44:20 +01:00
Alexander Orzechowski
9ac94516b8 wlr_scene: Skip direct scanout if there is no damage 2023-03-09 05:38:53 +01:00
Simon Ser
38839ac536 gamma-control-v1: simplify get_gamma_control error handling
Allocate resources only after checking the request.
2023-03-06 13:23:51 +01:00
Simon Ser
9108717d5d gamma-control-v1: fix handling of duplicate control
When a new client comes in and tries to create a
zwlr_gamma_control_v1 object for an output which already has one,
we were destroying the old object and early-returning. The early
return causes the new object to not be set up properly: it's not
inserted in the list and doesn't get the gamma_size event.

Fix this by destroying the new object, and leave the old object
intact, which is what was the intent I think.

Closes: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3605
2023-03-06 11:40:48 +01:00
Isaac Freund
5ae17de23f
xdg-shell: improve validation of resize edges
The current validation doesn't catch some invalid values such as 3 or 7.
2023-03-02 21:31:51 +01:00
Simon Ser
5079000e49 output: allow modeset with buffer while frame is pending
Closes: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3600
2023-02-26 18:42:31 +01:00
Simon Ser
ab7eabac84 output: leverage wlr_output_configure_primary_swapchain()
Replace our current logic to setup the primary swapchain with
wlr_output_configure_primary_swapchain().

- Removes some code, reducing duplication
- Stop overwriting wlr_output.swapchain with a yet-to-be-tested
  swapchain: remove the error_destroy_swapchain label.
2023-02-24 18:22:20 +00:00
Simon Ser
fef8ab22e3 output: introduce wlr_output_configure_primary_swapchain()
The goal is to simplify wlr_output by moving all of its rendering
API into separate helpers. Here is a first step to sunset
wlr_output_attach_render(). Instead, compositors call
wlr_output_configure_primary_swapchain(), wlr_swapchain_acquire(),
wlr_renderer_begin_with_buffer() and wlr_output_attach_buffer().

Note that compositors can supply a base struct wlr_output_state.
This is useful to allocate a buffer suitable for submission with
a modeset, for instance.

Closes: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3079
References: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/3197
References: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/3984
2023-02-24 18:22:20 +00:00
Simon Ser
b33ab26fe7 render/swapchain: make public
We've had this struct for a while. It'd be useful for compositors
if they want to manage the swap chains themselves instead of being
forced to use wlr_output's. Some compositors might also want to use
a swapchain without an output.
2023-02-21 17:14:31 +01:00
Simon Ser
7215bd1e0f output: expose wlr_output_state_set_buffer() 2023-02-21 09:43:43 +00:00
Simon Ser
4629d0ef40 output: expose wlr_output_state_finish()
Same as the original function, but check for the bitfield before
calling pixman_region32_fini(), because that function expects an
initialized region.
2023-02-21 09:43:43 +00:00
Simon Ser
d25ab03326 screencopy-v1: drop unnecessary pixman_region32_t casts
The Pixman API now accepts const parameters.
2023-02-21 09:37:59 +00:00
Alexander Orzechowski
3ef9f91283 wlr_scene: Add dmabuf_feedback helper 2023-02-20 17:21:17 -05:00
Alexander Orzechowski
4ddc20e14c wlr_scene: Extract considering logic for direct scanout 2023-02-20 16:53:59 -05:00
Alexander Orzechowski
323f0b94db wlr_scene: Cleanup header includes
We don't need to pull wlr_compositor.
2023-02-20 16:53:59 -05:00
Simon Ser
849c362ffb linux-dmabuf-v1: add helper for output layer feedback events 2023-02-20 18:38:57 +01:00
Simon Ser
e1335a792a output-layer: add feedback event 2023-02-20 18:38:57 +01:00
Simon Ser
3e0ce761ad output: add wlr_output_set_layers() 2023-02-20 18:38:09 +01:00
Simon Ser
2f29b0c438 Add wlr_output_layer
This is based on previous work [1] [2].

This new API allows compositors to display buffers without needing to
perform rendering operations. This API can be implemented on Wayland
using subsurfaces and on DRM using KMS planes.

Compared to [1], this approach leverages wlr_addon_set to let backends
attach their own private state to layers, removes the pending
state (necessary for interop with wlr_output_commit_state()) and
enum wlr_output_layer_state_field.

[1]: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/1985
[2]: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/3447
2023-02-20 18:38:09 +01:00
Vasyl Vavrychuk
58067a2084 fullscreen-shell: add release request handler 2023-02-17 10:24:47 +00:00
Kenny Levinsen
1225f81a6a scene: Add fractional scale handling 2023-02-08 16:31:39 +01:00
Kenny Levinsen
efb8df8b22 wp-fractional-scale-v1: new protocol implementation
This implements the WIP wp-fractional-scale-v1 protocol.
2023-02-08 16:31:39 +01:00
Simon Ser
c6ecbf09b5 linux-dmabuf-v1: fix missing SCANOUT flag
options->scanout_primary_output indicates an output on which scanout is desirable.
Set the missing SCANOUT flag.

Fixes: 0c966f102c ("linux-dmabuf-v1: add wlr_linux_dmabuf_feedback_v1_init_with_options()")
2023-02-07 11:25:10 +01:00
Simon Ser
8c5713bd7a linux-dmabuf-v1: use wlr_linux_dmabuf_feedback_v1_init_with_options() 2023-02-06 19:14:15 +00:00
Simon Ser
0c966f102c linux-dmabuf-v1: add wlr_linux_dmabuf_feedback_v1_init_with_options() 2023-02-06 19:14:15 +00:00
Simon Ser
b264ec7767 linux-dmabuf-v1: add basic helpers for feedback 2023-02-06 19:14:15 +00:00
Simon Ser
5cd14dfc91 linux-dmabuf-v1: stop using const in feedback
Instead of using const pointers, use structs owned by the tranche.
This will allow wlroots to expose helpers to build feedback
objects.
2023-02-06 19:14:15 +00:00
Consolatis
f6008ffff4 xdg-activation: accept pointer focus for new tokens
This patch allows surfaces without keyboard focus
but with pointer focus to receive valid tokens.

This can be relevant for applications using an older version of
the layershell protocol which only provided the choice between
no keyboard focus and exclusive keyboard focus.
2023-02-06 15:52:02 +01:00
Alexander Orzechowski
7b32c25a4f wlr_scene: Rename wlr_scene_surface_from_buffer
This renames it to wlr_scene_surface_try_from_buffer to be more clear
that this function can return NULL. This is inline with the rest of
wlroots[1].

[1] https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/3991
2023-02-04 02:57:42 -05:00
Kirill Primak
dc7b5ab21e layer-shell: forbid changing the existing popup parent 2023-02-03 19:29:11 +03:00
Simon Ser
92eedb84c1 output: don't attach buffer on first commit if disabled
In output_ensure_buffer() we create a swapchain and attach an empty
buffer to the output if necessary. We do that during the first commit.
This is fine when the first commit enables the output, however this breaks
when the first commit disables the output. A commit which disables an
output and has a buffer attached is invalid (see output_basic_test()), and
makes the DRM backend crash:

    00:00:00.780 [wlr] [backend/drm/drm.c:622] connector eDP-1: Turning off
    ../subprojects/wlroots/backend/drm/drm.c:652:44: runtime error: member access within null pointer of type 'struct wlr_drm_crtc'
    AddressSanitizer:DEADLYSIGNAL
    =================================================================
    ==2524==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x7f22e894afc1 bp 0x7ffe1d57c550 sp 0x7ffe1d57c420 T0)
    ==2524==The signal is caused by a READ memory access.
    ==2524==Hint: address points to the zero page.
        #0 0x7f22e894afc1 in drm_connector_commit_state ../subprojects/wlroots/backend/drm/drm.c:652
        #1 0x7f22e894b1f5 in drm_connector_commit ../subprojects/wlroots/backend/drm/drm.c:674
        #2 0x7f22e89e8da9 in wlr_output_commit_state ../subprojects/wlroots/types/output/output.c:756
        #3 0x555ab325624d in apply_output_config ../sway/config/output.c:517
        #4 0x555ab31a1aa1 in handle_new_output ../sway/desktop/output.c:974
        #5 0x7f22e9272f6d in wl_signal_emit_mutable (/usr/lib/libwayland-server.so.0+0x9f6d)
        #6 0x7f22e899b012 in new_output_reemit ../subprojects/wlroots/backend/multi/backend.c:161
        #7 0x7f22e9272f6d in wl_signal_emit_mutable (/usr/lib/libwayland-server.so.0+0x9f6d)
        #8 0x7f22e895a153 in scan_drm_connectors ../subprojects/wlroots/backend/drm/drm.c:1488
        #9 0x7f22e893c2e4 in backend_start ../subprojects/wlroots/backend/drm/backend.c:24
        #10 0x7f22e892ed00 in wlr_backend_start ../subprojects/wlroots/backend/backend.c:56
        #11 0x7f22e8999b83 in multi_backend_start ../subprojects/wlroots/backend/multi/backend.c:31
        #12 0x7f22e892ed00 in wlr_backend_start ../subprojects/wlroots/backend/backend.c:56
        #13 0x555ab317d5cc in server_start ../sway/server.c:316
        #14 0x555ab317748d in main ../sway/main.c:400
        #15 0x7f22e783c28f  (/usr/lib/libc.so.6+0x2328f)
        #16 0x7f22e783c349 in __libc_start_main (/usr/lib/libc.so.6+0x23349)
        #17 0x555ab3134c84 in _start (/home/simon/src/sway/build/sway/sway+0x377c84)

Fixes: 3be6658ee7 ("output: allocate swapchain on first commit")
Closes: https://github.com/swaywm/sway/issues/7373
2023-02-02 16:48:35 +00:00
Kirill Primak
911648f430 subcompositor: fix mapped parent check 2023-02-02 17:26:25 +03:00
Simon Ser
eb3e8f08a8 subcompositor: convert to try_from
References: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/884
2023-02-01 20:14:39 +01:00
Simon Ser
c5f7f8ab98 ext-session-lock-v1: convert to try_from
References: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/884
2023-02-01 20:14:12 +01:00
Simon Ser
f9bd416d41 layer-shell-v1: convert to try_from
References: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/884
2023-02-01 20:13:53 +01:00
Simon Ser
49cb85ad72 input-method-v2: convert to try_from
References: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/884
2023-02-01 20:13:30 +01:00
Simon Ser
711a1a3ed4 xdg-shell: convert to try_from
References: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/884
2023-02-01 20:12:49 +01:00
Simon Ser
0f24d27e0b xdg-shell: rename wlr_xdg_popup.committed to sent_initial_configure
We made a similar change to wlr_xdg_toplevel.
2023-01-31 16:27:05 +01:00
Simon Ser
df0c926a7a xdg-shell: rename wlr_xdg_toplevel.added to sent_initial_configure
This is more descriptive, and avoids the confusion with
wlr_xdg_surface.added.
2023-01-31 16:20:33 +01:00
Simon Ser
e1a1dc4be5 xdg-shell: remove unnecessary return
We're at the end of the function anyways.
2023-01-31 16:20:33 +01:00
Simon Ser
e69dd909f7 xdg-shell: reset added/committed flag on unmap
When a client attaches a NULL buffer to its wl_surface, it's
unmapped. This resets the xdg_surface in its initial state. An
extra NULL commit makes the compositor send an initial configure
event.

Note, wlr_xdg_toplevel.added is separate from wlr_xdg_surface.added.

Closes: https://github.com/swaywm/sway/issues/7397
2023-01-31 16:20:10 +01:00
Simon Ser
0e54b861e9 seat/keyboard: constify wlr_seat_keyboard_notify_enter() 2023-01-26 15:06:45 +00:00
Simon Ser
695d28c250 seat/keyboard: constify wlr_seat_keyboard_notify_modifiers() 2023-01-26 15:06:45 +00:00