Speech Transcript - High resolution display support in GNOME

0:00:09	right me
0:00:11	okay
0:00:12	right i'm alex also and
0:00:15	and i
0:00:19	i am and so we can might recognise this is from glottic two thousand virus
0:00:25	and then in that i know for a long time i initially got there because
0:00:31	i'm right diameters and i ran an sauce
0:00:35	since then i moved on since two thousand one word for red hat just a
0:00:39	group
0:00:40	you mean random stuff all over the place
0:00:44	recently i've been working on the overall high dpi stuff for
0:00:50	i know desktop and the linux desktop in general
0:00:54	i want to start with a
0:00:57	very specific
0:00:58	problem definition this is a from book pixel
0:01:04	typically runs from list but it's very easy to kind of easy to install any
0:01:09	linux operating system on it and this is
0:01:13	muscles and or nineteen which is
0:01:17	it supported every kind of harvard ask a sickly
0:01:22	except
0:01:24	why when you read it looks like this
0:01:26	i don't it doesn't actually look like this it's much high resolution but
0:01:30	scaled down to fit on the display
0:01:33	right so
0:01:35	it's not really useful even though it's taking we will support it
0:01:39	is completely useless
0:01:42	because you can even in stuff
0:01:45	normal it's so you know about the do you stuff
0:01:48	and you can use that operate in sure
0:01:51	for wanna taurus generally how many pixels per
0:01:54	in some you wanna start
0:01:57	and
0:01:58	historically all like
0:02:00	normal monitors i mean be a projected doesn't have it but any random normal wanna
0:02:05	so we have around hundred
0:02:07	nineteen eighty or a hundred twenty or something but not
0:02:11	but the pixel two hundred thirty nine
0:02:14	right so
0:02:16	doesn't really work
0:02:18	so we had a setting in X next we actually
0:02:22	which for on various reasons is always set to ninety six by know
0:02:26	but there is a there's a property
0:02:29	take scale factor i think is that so this had to we get that
0:02:34	and it's now
0:02:37	juice able and some so you can actually read stuff
0:02:41	but
0:02:43	it really only change the text side
0:02:46	or someone's mother is just to so
0:02:49	one is that why did like scale and it right
0:02:55	it turns out that
0:02:57	during that we went traditional density monitors would be a bad thing
0:03:04	and this monitors be maybe not a pixel but on the other ones
0:03:08	a pixel is like invisible thing
0:03:10	you better not enjoying one point five pixels because that looks fancy we're
0:03:16	and so everything you mentor has actually matched the target
0:03:20	pixel great you even if you're sources an S P G or whatever invented wrong
0:03:25	one point zero pixels or things will
0:03:28	really bad
0:03:29	also lot of content that you see in a typical you why
0:03:32	you have the i can't swich are changing use or can choose a bunch a
0:03:37	pen about our pictures whatever
0:03:39	cursors are also pixels
0:03:43	and scaling those for just doesn't look very well
0:03:47	there's an example of this is
0:03:49	i mean this is a scale version and then all those
0:03:53	and put it down on which is scale so they can see all the pixels
0:03:57	and if you were to render this is a hundred twenty percent
0:04:01	say to compensate for your like to guys change you get like
0:04:06	kind of hard to see that
0:04:08	some of the lines would get in the middle of some pixels evening been fuzzy
0:04:12	summer sharper and the probably once or less
0:04:16	re to get this
0:04:19	and the pixels are scale on they only i can so
0:04:23	around
0:04:25	those are ceases images and there's the ganges at the core so their scale
0:04:31	also
0:04:33	turns out that it's not really a problem right
0:04:36	for instance this
0:04:37	thank but i have
0:04:40	are you still a twenty three inch monitor at work
0:04:44	and i'm not sure a button on it
0:04:47	and it's like six millimetres on the laptop in eight on the
0:04:51	so this way and it's not really a problem
0:04:54	and i could
0:04:56	happy to the size and everything to match the deep i spent will be stupid
0:05:01	because you wouldn't be anything but you get all this bad looking stuff
0:05:06	the
0:05:08	we were getting it from the time they were solution the pixel have not care
0:05:14	the routine and just lay stuff and something it doesn't work
0:05:19	so we had to do something
0:05:22	sell
0:05:24	it's not looking at some of the things that wrong
0:05:27	i don't obviously a pixel they so they're not scale and also the way too
0:05:31	small can see you know they look kind of weird if you look at the
0:05:35	i can there next to the text
0:05:38	much more than the textbooks
0:05:40	out of sync
0:05:43	something on the will gents are
0:05:46	specified in terms and
0:05:48	and you know they're fixed pixel so there will be hard to pay
0:05:53	trying to
0:05:54	had a scrollbar for instance is really hard
0:06:00	and i don't know it's okay here but if you know how they won't talk
0:06:04	as opposed to look supposed to have a really large image background with the tech
0:06:08	sensors on it and it just doesn't care
0:06:13	and
0:06:14	the full window sizes a
0:06:17	i mean some of this so the windows look okay is there are fully specified
0:06:21	by the size of all we distant anything that has anything that scrolls
0:06:25	but you have it or not less
0:06:28	we don't really know the default size to
0:06:31	the waste typical we fixed a biased having to order of the at specify random
0:06:36	the full
0:06:37	size in pixels
0:06:40	typically a not a problem but and get everything wrong for
0:06:44	the pixel
0:06:46	also some of the intro widgets are specified in pixels
0:06:49	okay with of the sidebars
0:06:52	the weight of the columns are notes
0:06:55	so small that
0:06:57	doesn't say it's a common labels adjust not doesn't make sense
0:07:02	and all on around of you can see it in minutes
0:07:05	really tiny
0:07:06	and also go slowly because it's expiration and everything is based on the typical size
0:07:12	is that
0:07:13	excellent have a little monitors
0:07:16	resizing windows really hard
0:07:19	all the padding is really thin so it's
0:07:22	doesn't look right
0:07:25	and basically
0:07:27	pixels or absolute pixels what is everywhere
0:07:30	either directly or indirectly via pixel based icons and it is
0:07:36	and also there's some points of code all the place that uses this
0:07:40	but we don't wanna have everyone change older cut
0:07:46	additionally if you
0:07:48	and we use multiple monitors things that you know more complicated
0:07:52	because
0:07:53	i don't think there's any how you've got external monitors
0:07:57	well
0:07:58	what negatives something super expensive want been generally if you plug in
0:08:03	extra montana and pixel you get a little you can i and how do you
0:08:08	have monitored same time
0:08:10	and windows the rolling back from whence going to the other
0:08:14	well i would become hero which or tiny depending on
0:08:17	what we invite them and if you have a minimum both look really weird
0:08:25	so
0:08:27	so the solution i came up and then it's not really
0:08:31	original in the sense that number didn't before it's pretty much one that covers dustin
0:08:37	i'm not exactly sure what
0:08:39	they do and when there's a has something kind of similar
0:08:43	but basically define redefine one pixels me on an old one utterance pixels new money
0:08:49	used to do but on kind of i mean something else
0:08:53	that at you one pixel napster multiple
0:08:57	device pixels
0:08:59	and then
0:09:02	and the scaling factor that would make it an integer to vital the
0:09:06	green alignment issues and also for technical reasons
0:09:10	lot of stuff like X windows
0:09:13	but when the are digit widgets can't add
0:09:17	don't a list of sizes and clipping goes to hell if you have
0:09:23	fractional
0:09:25	a box of that's it
0:09:27	and all the scaling is done automatically so the that absolutely know about it
0:09:33	thank you render high resolution or if you draw
0:09:38	but not based in just to get scale automatically
0:09:42	and
0:09:42	and then and change you actually have some
0:09:45	X a laid out like icons or ceases images for backgrounds and borders or even
0:09:52	like about source or external images
0:09:56	we had a new A P I S or ways to let you specify multiple
0:10:00	sources and then just so that you can pick the right one depending on the
0:10:04	on the on the window
0:10:05	okay
0:10:08	so when that and it looks like this
0:10:13	i mean obviously at this is like
0:10:22	i mean obviously it just looks like any other know but if you actually lot
0:10:27	of pixel and the to be high resolution icons and
0:10:33	all the things where the right sizes and everything i mean
0:10:37	it's still a tiny per se so there's some stuff like to fix but most
0:10:40	of it works
0:10:43	so
0:10:45	i guess there's a lot of all percent sorry we go over all you have
0:10:49	to change your apps mostly they shouldn't have to change that
0:10:53	only see the ice change a bit
0:10:56	we stopped i roll
0:10:58	generally hire a support scaling and you can just set scale
0:11:03	and we can just set the scale
0:11:06	but
0:11:10	i have
0:11:11	and it something on the my scale like this at the surface
0:11:14	so that any higher context you create on that so we will automatically always get
0:11:19	initialised diskette
0:11:21	you cannot get rid of the scale accident by like resetting that matrix and whatever
0:11:27	and additionally and maybe even more important if you if you draw the surface of
0:11:33	the something else
0:11:34	scaling is also applied
0:11:36	so you have and
0:11:38	i can as
0:11:41	target of forty eight by forty eight abstract pick something that you have ninety six
0:11:47	by nine six
0:11:48	image then you set unless got that you will enjoy a non scale thing it
0:11:54	will automatically scale down
0:11:57	although generally all this you know don't have to care that a does that for
0:12:01	you
0:12:03	you can however that with changes
0:12:06	straight window abstraction for forty K so it has all the window screen monitor need
0:12:13	to targets
0:12:15	those not always almost report cites in this abstract pixel space so
0:12:20	when you thing is they were G D K window might not match the size
0:12:24	of the corresponding X one now
0:12:27	so the expand maybe turin pixels and detailed reports
0:12:30	three hundred pixels
0:12:33	and it so to compensate if you really need to do something a little you
0:12:36	have to get scale factor for the when the
0:12:39	or not or if you're doing something
0:12:41	global
0:12:43	and also the multiple sessions
0:12:45	or like and then it
0:12:48	reported in the abstract texas based that
0:12:51	since time immemorial we use floats for the event so
0:12:56	still have superstition
0:12:58	just in a different for
0:13:01	i had to add a couple of at articles to
0:13:05	get the current
0:13:06	cursor positioning floats of stuff but generally
0:13:10	it always been using floats for women's
0:13:15	did you integrate similar services is what you use when you create all screen images
0:13:19	in U K three
0:13:22	it's always been there is change now so that automatically creates a scale surface if
0:13:28	you if you are targeting scale window
0:13:31	you should always use this role directory in your in services because
0:13:34	if you create a little for solution low scale double buffer for a high scale
0:13:39	when though you get excellent results
0:13:42	and you have to be careful that the scale when that for instance widget whatever
0:13:48	you're working on can change over time so
0:13:52	make sure old problem of course or
0:13:55	we created when you
0:13:57	in the scale changes
0:14:00	and you have this is they wanted to decide
0:14:04	or something about it but
0:14:06	off you don't have to do you
0:14:08	you just
0:14:09	look at the scale it or something
0:14:12	and it is different from what have you rendered it is invalidate
0:14:16	next or
0:14:17	but there is a thing
0:14:20	there there's some you think very similar to prince in the surface but it creates
0:14:24	and just
0:14:26	in the surface which is
0:14:29	it's a long time or service but it's you can access the pixels
0:14:33	market expert
0:14:37	the advantage here is that you can now specify the scale of it
0:14:40	and then
0:14:42	and it also lets you specify window for the target so
0:14:47	if you're creating an
0:14:49	in the service that you eventually will draw a next one now we can handle
0:14:53	time okay and i'm really generally space
0:14:57	so you always get the extra
0:15:00	exchange
0:15:04	also there's this
0:15:07	have a circus create for exposed help or which is really
0:15:10	simple wrapper of quite similar in the surface that just converts
0:15:14	from picks before that too
0:15:17	performance which incidentally are not exactly the same so right now
0:15:23	we are actually allocating a new surface and converting from the
0:15:28	to promote apply and also mode
0:15:31	every time you draw textbook so you should use sort of this
0:15:37	i don't know
0:15:39	okay this is what most people actually see it technicians
0:15:43	well
0:15:45	the size allocation everything that related size
0:15:48	or and this
0:15:50	abstract well that's the pixels
0:15:52	and weighted has a scale proper day you get the scale what you can get
0:15:56	scale
0:15:57	but there's also it's also proper basic and get notified on it if you need
0:16:02	to
0:16:03	and i wanted to catch whatever
0:16:06	also
0:16:08	for the reasons
0:16:10	and this about the for hire circles that it is then you prefer way too
0:16:16	i in that state as
0:16:19	don't wanna use X path
0:16:22	i mean you can just pick spot in your internal stuff attendance
0:16:25	supposed to be drawn the screen you probably use our services that
0:16:28	because they can have scale
0:16:30	so when you don't and you will automatically upscale dollars gonna whatever and you can
0:16:37	pre target and to the right
0:16:40	type of window any and they're already in the right kind of formants something more
0:16:43	efficient around
0:16:45	so these are new things you should use
0:16:49	okay and manage and just get some hundred fixed well
0:16:53	i mean that identical except the you say from X possibly on the explode okay
0:17:02	so well still work but you should prefer our services
0:17:07	i can things extend as so that
0:17:10	if you asked for a fully pixel icon and then we did a scale to
0:17:15	we will actually ask for ninety six pixel one use that and furthermore there's also
0:17:20	extension to the actual i can be respectable well i can be in itself to
0:17:25	define hire is versions of
0:17:29	a likens because in it's not always the case and it's a good idea to
0:17:33	use to ninety six point nine six i can
0:17:35	for the forty eight it's a case
0:17:38	because things like that our clients or ten or is more details if there's any
0:17:43	text in it
0:17:45	a and it's gonna be too small if you're better than like this excellent forty
0:17:49	eight size
0:17:52	there's some extensions it in the evening system to like we specify
0:17:56	alternative images
0:17:58	if you use this make sure they have the same
0:18:02	size some scaling factor because layer layout is affected by the size
0:18:08	and we're only going to load the one that
0:18:11	is used
0:18:14	so i don't
0:18:16	something to the current state is layers that was on the stack
0:18:20	i had a bunch of protocol additions for will and landed in one point two
0:18:27	and in one but you only
0:18:30	it's that's out and service we really means monitoring window
0:18:35	that's the we'll in terms
0:18:37	well the positions and sizes are in this abstract pixels
0:18:41	and then the compulsory can shows the actual scale for every monitor
0:18:45	and you can be in it as a property on a little bit but well
0:18:48	the scale is so
0:18:50	if you push a
0:18:53	okay long window on the on a scale to output it will automatically of scale
0:18:58	it all drawing it
0:18:59	but declined can see this and pretty allocate a slice risque to buffer voiced more
0:19:06	pixels
0:19:07	so then the compulsory doesn't have to
0:19:09	right
0:19:11	and it also what's correct handling a mixed mode monitor so one drawing a single
0:19:17	buffer it can upscale online and not scale you know
0:19:22	even scale it difference
0:19:24	slices
0:19:27	it came the backend waylon will automatically take the maximum scale of all the windows
0:19:33	that are cover or all the models are there are covered by the windows so
0:19:38	if you drag your window we automatically get resized where we can you scale which
0:19:43	is one of the reasons you have to take care about a double offers
0:19:48	can change by using that you know in the
0:19:52	implementation size really in simple
0:19:58	waylon and indicate currently is uses inner surfaces
0:20:03	so we used at the device going that and this works and this is
0:20:08	huge and this is what we wanna go it has every support for the parts
0:20:12	a little bit is it does correctly support the next guy wanna for
0:20:16	and
0:20:19	and the scaling stuff this is really
0:20:22	part of the native system now we can't be on X
0:20:28	a bunch of us don't use expert
0:20:31	so we have sometimes for that you
0:20:34	however we only support a single scale for all
0:20:38	roll the screen actually wanted that you can technically open the books place and different
0:20:43	scales i guess but practise everything's gonna be the same scale
0:20:48	works fine for laptop maybe not if you have lots great thing
0:20:53	indicate like fakes all the states i systems of
0:20:58	so it scale is enable little i think the size of the windows and wanna
0:21:02	sorenson screens one not the coordinates of the excellence are divided by the scale we
0:21:08	were contradictory events
0:21:11	there is this environment variable unique a scale you can set
0:21:14	so really
0:21:16	very useful for the pointing if you're actually don't have to hide if you know
0:21:19	why she decided and running around and see a and you can see if it
0:21:25	works
0:21:27	the weights actually meant to work is that we had
0:21:30	to next settings that again the settings tingle
0:21:34	set for the chain will
0:21:37	hopefully eventually i have some really bad patches but
0:21:41	and the one on the tech the actually on the screen and just pick the
0:21:45	right scale
0:21:47	and it telex
0:21:49	or is tell detaining just use
0:21:53	there's also new settings
0:21:55	related to scale with just on scaly got because we still wanna is
0:22:00	this don't wanna step and in you know actually lords to support the school apps
0:22:05	like to take a two or whatever
0:22:08	nobody uses that anymore
0:22:11	and it but
0:22:12	if we set a really high tech you know i
0:22:16	false and the scaling and then digits we have the dark to again did fallen
0:22:20	so we have this new on scale late you guys heading that scale where you
0:22:25	use
0:22:27	also very simple
0:22:30	implementation we use used normal tire likes stuff that the wide scale
0:22:37	you have to be a bit more careful since the scaling stuff is kind of
0:22:40	done extra lead to X
0:22:42	X itself has no idea of the scaling so if you're mixing X stuff and
0:22:46	it a stuff like
0:22:48	using X video or opengl or something you have to
0:22:52	what correctly get the scale factor a lot why sizes and stuff most of the
0:22:57	time if you create stuff from G ditch a in just consume it and read
0:23:03	back the sizes from X
0:23:05	things should work but
0:23:08	you may need to take care at least
0:23:11	we also have a about sex implementation which is
0:23:15	well this trivial would just uses all the ports
0:23:18	stuff just basically identical to our stuff
0:23:21	we do is read back the scale factor from of X
0:23:26	right now there's some bargain on your over
0:23:28	or create similar those and it's
0:23:31	create a scale it sort of
0:23:33	scale words to mention whatever it's cool so all the ski all the scrolling and
0:23:38	everything that's double buffer
0:23:40	currently look kind of excellent a routine this place
0:23:48	i think said when there's eight has some kind of high depressed or i haven't
0:23:52	really looked at it maybe we should
0:23:55	maybe some want to do that
0:23:58	need course are scaling with you have
0:24:01	we need tiny cursor it's hard to see
0:24:04	and into actually finalised i can make changes
0:24:08	didn't get any comments on it something which is can it
0:24:12	when i need the i versions of something like this may be able maybe is
0:24:18	some of them i haven't extra too much detail we have to look at that
0:24:23	details are shipped a bunch of something like those we want probably want iris versions
0:24:28	of those
0:24:29	and we want full integration of
0:24:32	you know detection of dpi and everything you know
0:24:37	i have some
0:24:38	how to hack patches that
0:24:41	well
0:24:44	mostly work
0:24:45	and it somewhere
0:24:48	also on the future i might or might not depends on how women go so
0:24:53	how much for content and maybe
0:24:56	when it maybe it's possible to do we want to monitor support ready X
0:25:00	at least you have a compulsive
0:25:03	most or because then
0:25:05	compulsory control which window different event
0:25:09	well the working
0:25:11	no it's worth it depends on a classroom goes away when
0:25:16	really
0:25:18	and also when we do you shot out to run remember we use randomly turned
0:25:23	up on the list as i have this pixel doesn't wanna so they can do
0:25:28	i did work
0:25:30	and
0:25:32	thank you
0:25:44	it sounds like i think you said that we win you get to separate circuses
0:25:49	at different scales and drive them independently i get some of these i mean it
0:25:54	that way multimode to works and X and where were somewhere one is completely different
0:26:00	and an X you L okay basically was should service that covers everything and they
0:26:05	stand out different parts of it so it's really hard to do we know in
0:26:09	a different sizes and of model to
0:26:13	doesn't work but in whale and
0:26:15	every output scans from it some buffer and it's up to the composite usual window
0:26:20	in both the buffers but i mean you centre and you scale it how everyone's
0:26:24	that if you're an application
0:26:26	with your own application you get you get just select
0:26:30	the scale of your window
0:26:33	but could you possibly say i want you to scale version and the ones known
0:26:39	that has this discussion about that but it's not have i don't i don't think
0:26:42	it's really important because
0:26:45	first was problematic because things like way out in terms of
0:26:50	text is different it's like independent different sizes
0:26:55	what you to hinting else also for related retina coming and also
0:27:02	windows spanning multiple once or is that a colour to is
0:27:07	didn't wanna have extra complexity of all over the place or something
0:27:12	so i guess you just pick scale
0:27:16	i don't want to actually happen
0:27:20	but on our sex if you if you do it as you plug in something
0:27:24	well gonna next i wanna ask you whether you want the best
0:27:30	what can best on the extra always where looking best only internal and
0:27:35	just fix that
0:27:38	right now i'm always pick
0:27:41	the want to not have to
0:27:42	one of
0:27:44	the want to almost or not but that the when the covers i pick the
0:27:48	wanna have to heights
0:27:50	but it's really a just
0:27:53	attention to detail and indicate can do
0:27:57	it's up to the at we need to select
0:28:00	or maybe we wanna support it just seems dpi that you haven't you is really
0:28:05	fourteen this idea
0:28:07	we have a year
0:28:08	one
0:28:09	scale ribbon
0:28:11	and that it we in this people would be we have in the future we
0:28:14	will be able you i gonna be
0:28:17	that's also some complexities in terms of the male being different and
0:28:22	and the way like
0:28:24	offscreen just for passion scrolly bottles now almost complexity for me
0:28:31	not very important use case
0:28:33	you can do it
0:28:38	i think i think it i think it's
0:28:41	hard enough that it so
0:28:46	okay
0:28:47	the question
0:28:51	you can sort of come up and play with the actual pixels later but
0:28:56	you do each buildings differently or use like demo
0:29:00	don't know what you were you were doing like a filled earlier it's like i
0:29:04	have a
0:29:06	the
0:29:07	randomly but
0:29:10	right or something
0:29:12	i think about a batteries explore the
0:29:16	system petition or something so the chrome stuff but that it wouldn't boot so how
0:29:21	to be everything that i do have some it failed
0:29:24	and will later it's
0:29:27	minute
0:29:29	it looks like you know
0:29:31	stuff like you have to be really close up to look at that and we
0:29:34	think about later also
0:29:39	question here and we will the composite or
0:29:43	draw itself and multiple
0:29:45	resolutions
0:29:49	because applications don't
0:29:51	don't have in the different monitors a resolution if you mean in composite turns that
0:29:57	we having that's right all over the place right i do union X server
0:30:01	both
0:30:02	but i mean the way works and presses waylon is that
0:30:06	you just give your buffer with that's to
0:30:10	composite or and you playing that this is that scale one
0:30:14	but what about the shell it's what's so we show was the composer
0:30:19	so it's a so if the shell as the way one composite are saying
0:30:23	and some apps
0:30:24	at hands that a
0:30:28	a hundred one hundred buffering plane this is that scale one
0:30:31	and your actual window or your actual models or is it scale to
0:30:36	it's up to the composite or the scale it by two
0:30:39	what and i can come are small monitors can need to do it what i
0:30:44	mean do you why of all of the composite or like them shot of barn
0:30:47	no i know mostly uses it a for stuff so
0:30:53	that's not the rest of what is a lot of a lot was also you
0:30:56	see and it are is do you know it's easy to set scale factor you
0:31:00	and i think is currently down that it shouldn't be that
0:31:06	money always fixing it
0:31:09	and but in and basically it's a lot adding it to somewhere in a matrix
0:31:13	that get and it's not really
0:31:19	and then there are some parts harder maybe like
0:31:23	getting
0:31:25	it is they're sending pixel based in is to have multiple
0:31:29	multiple sources of pixel a
0:31:32	i think for
0:31:34	for the shallow so that i us are either symbolic i have the terrace at
0:31:38	or
0:31:39	or just a file which are these space really arts scale are still look good
0:31:47	okay so
0:31:51	mike
0:31:53	my question be about the you have a motion
0:31:59	events
0:32:00	you use you were saying that you do you subpixel
0:32:05	subpixel cool didn't we some hard ways actually a problem because they keep sending
0:32:11	they keep sending events with more new changes like as it subpixel motions and we
0:32:19	end up breaking pretty much the whole stack
0:32:22	well we can we will run into
0:32:26	we already do this
0:32:28	well it everywhere
0:32:30	and he indeed is actually causing problems and on wondering whether that's gonna have problems
0:32:37	okay i'm generally you never gonna hit the scale other than one or two so
0:32:42	it's
0:32:43	i'm gonna have closer
0:32:45	zero point five or one
0:32:48	no way how that was great
0:32:52	that know that those adjudicated motion compression full things well subpixel
0:33:02	i mean it was the right way of floating point because
0:33:05	an is to fix it for waco talents
0:33:08	nineteen ninety seven or whatever so
0:33:11	it's in his work
0:33:14	okay very no thank you
0:33:26	so we're now if you're very high dpi screen
0:33:31	and you start an application a
0:33:34	would you could be
0:33:36	does it start a with its windows
0:33:40	who
0:33:42	no scaling or want one or
0:33:45	all you need to you know with about a hundred snaps you can see it
0:33:49	it's gonna be a do you mean
0:33:52	if you if you i mean i previously i'm recommended or i am updating an
0:33:58	existing application
0:34:03	what happens by the just good but you'll it's it looked as if you were
0:34:09	on a little bit i screen and everything is as
0:34:12	for
0:34:14	what you mean need to looks
0:34:16	i mean it no it's actually in terms a holly application server whatever sees everything
0:34:22	but it will be scale by default
0:34:25	i know it's if you if you install zero twenty whatever where this is an
0:34:30	excellent it automatically pick up effect of those are really quite a screen but people
0:34:35	everything will be scaled so it's
0:34:38	approximately this line size that would be a
0:34:44	button and hire or something
0:34:47	right precision i mean you know maybe just works
0:34:52	there's some cases i am where you can write it if you're for instance
0:34:59	full at anyone and you have a bunch of ex boss but for all your
0:35:04	project X a wanna render them
0:35:06	you need to take care
0:35:09	detecting that
0:35:10	is actually more pixels
0:35:12	i mean like spectrum ask about a slight begin so well you know if something
0:35:18	present we need to know if it's down scaling
0:35:22	a large textbook and it
0:35:26	have the but to me to do you have to get this going factor to
0:35:30	know that you need to generate more pixels when you're doing something
0:35:34	like one i'm thinking about him and i have michael some widget problem or run
0:35:38	team actually you know those you don't okay
0:35:44	i mean well we don't know but i would still don't show the wrong pixels
0:35:48	compared the device text
0:35:49	yes
0:35:51	also
0:35:57	so it's not a problem because that's what it's doing okay so this is around
0:36:03	when you have a problem is gonna scale itself but what about the came victims
0:36:08	custom widget
0:36:10	you mean the canvas the display of the actual image itself
0:36:14	and that's the only place think impair you have to take care about actually having
0:36:18	twice the amount of pixels on each axis then you see as virtual pixel so
0:36:23	i don't know how takes cost and i think from what particle rumours that show
0:36:28	how many pixels a but we but you should be i mean and
0:36:33	if you have to image in one to one
0:36:36	right so like hundred percent than you will actually show a little square per image
0:36:40	pixel maybe because i'm just wondering how like about a picking up pixels like rulers
0:36:49	why be a that's sure that a little numbers permission expand scale my
0:36:55	accordingly your i that's just the front pixels like the virtual pixels you
0:37:02	you use an answering everything else i mean the text we get smaller and to
0:37:06	get a
0:37:07	rendered as a vector graphics anyway so it look at risk
0:37:10	but the ruler chicks they should be just in your normal pizzas like not the
0:37:15	device pixels but you know from pixels
0:37:18	and only if you scale out so you your image source has
0:37:22	the canvas itself has actually more pixels available then you want to display then you
0:37:26	can go hi dpi and actually show more this shall know exist and then normally
0:37:33	but that's the only case i need to adapt to make it look
0:37:37	everything else pictures of the box
0:37:39	even the i consider
0:37:55	i'm really surprised by a minimal or no in terms of you know
0:38:01	and like the it just works for a radio readers
0:38:07	very
0:38:09	i haven't really tried it on absent you custom lot until an expensive of
0:38:18	partially because most ominous for why just lot are excellent
0:38:21	or not really doing a lot of course open G L anymore
0:38:25	i don't know if i would be other pride but registration or
0:38:30	expand you need to fix
0:38:33	stuff that works but and that it should but thank you just work
0:38:39	and it's really nice to hire
0:38:42	right next everything is
0:38:45	automatically scale
0:38:50	it does what
0:38:53	but does it also thanks
0:38:55	does it get the size of a X I D from X
0:38:59	minutes or more
0:39:00	but it should
0:39:02	as long as it doesn't get the case size and believes that was like you
0:39:08	just
0:39:11	actually i think
0:39:13	there is one issue and when can doesn't currently okay to
0:39:17	twelve double size double but for so what okay and was asleep kind of excellent
0:39:23	my
0:39:26	which you can use you pictures and
0:39:30	what do you can ace
0:39:33	which toolkits
0:39:35	well right now it's just
0:39:36	okay two or three two am in three a to your whatever you whatever work
0:39:42	because it
0:39:44	has the full set of for X wondering it guys
0:39:49	we don't wanna be alone
0:39:52	it does right and you doing because although i have that so
0:39:59	don't wanna do that
0:40:03	it's just kind of bad but
0:40:07	just wanted i already
0:40:10	i was wondering how this works with the hinting this car now
0:40:16	exactly the dpi that is gonna be
0:40:20	and working out or is it took to a it the other the other thing
0:40:25	i choose
0:40:26	thinking through a little bit about the clapped aside the ten
0:40:31	which is going to require or
0:40:35	we're gonna need to make sure that ten
0:40:37	when it's going to knows about the scale point to
0:40:41	huh
0:40:42	to do that
0:40:44	i mean really looked at it and i just assume that in the you know
0:40:48	that
0:40:49	but what if we just trucks care what to do when the technicians when as
0:40:53	you look
0:40:54	but there should be some
0:40:56	it's also the for matrix and everything i just have think more they share
0:41:01	so just kind of words statistically well in and well to it
0:41:08	slightly or my maybe give you a slightly different layout your widget sizes
0:41:14	because maybe a label was have extra later
0:41:18	or whatever and
0:41:21	we're gonna pick a different part
0:41:24	or want your phones where the metrics are slightly differently around and whatever
0:41:30	it's not a problem right now because we only support one
0:41:34	surface before per window so it's always to just one scale
0:41:38	but maybe we wanna okay having some way to
0:41:43	always get the same kind of
0:41:48	well did you think of a turning hitting a really want to go to the
0:41:52	like three or something
0:41:55	then that's right out of high dpi text
0:41:59	and various ways that those that
0:42:02	and what does it
0:42:04	i have not really thought about it
0:42:07	it's something we should maybe look at
0:42:10	maybe hunting doesn't really matter that size
0:42:15	i think actually practise it will be disable mostly
0:42:19	basic of origin of fonts the hands are not
0:42:22	there for that kind of size at least like
0:42:26	what the really details
0:42:29	manual point handing is just not enable and
0:42:33	forty pixel point awesome
0:42:35	so we kind of get away
0:42:40	as possible that we want to have
0:42:43	we used to
0:42:46	declare your fonts metric intense whatever one on widgets
0:42:52	try to make in exactly the same on different scales
0:43:03	you know
0:43:05	and something to work well worth looking into
0:43:10	actually but not did a lot more content for
0:43:14	crow i guess but we can ask
0:43:18	here
0:43:27	more question
0:43:31	and they brought first ask me excuse you're gonna talk another and a for firefox
0:43:39	actually passed this
0:43:45	kind of hidden but if we make that scale that we all the detect
0:43:52	make that
0:43:53	and
0:44:00	make that available
0:44:10	but
0:44:12	very see okay
0:44:20	so the this is layouts use S them pixels per pixel
0:44:25	if you set that to choose that makes basically needs to scale
0:44:29	every pixel by to
0:44:31	if we just get gave the finals all people way to we the current scale
0:44:37	should be simple melodies pick that up
0:44:41	and it more
0:44:44	that's it's extension you have it's not going upstream a like if you propose that
0:44:49	in the stack or anything
0:44:51	not really i mean if you look at how all multiple
0:44:56	that's you know alternative things work on the web right now it's like this horrible
0:45:00	mismatch of
0:45:02	defined everything
0:45:04	there's like and javascript the runs
0:45:07	and rewrites that you're always the one
0:45:10	problems all over the don't felix for images and places them that or do you
0:45:15	know this way
0:45:22	maybe i mean
0:45:28	and it's nice a that
0:45:33	i wanna be a
0:45:35	and indexation this

High resolution display support in GNOME

Developer Experience Track

Alex Larsson