Vulkan is HARD

Since I really like graphics programming and I always used OpenGL so far, I wanted to learn Vulkan, in this video I'm documenting the process of learning it and the steps I took.
Resources:
- Vulkan specification: registry.khronos.org/vulkan/s...
- Vulkan tutorial: vulkan-tutorial.com

[@lolzdev]

Hey guys, if you liked the video and you want to suggest me the topic of the next video feel free to write it here!

[@deassisbarroso2515]

I suggest a content about console emulation with vulkan or making a game with vulkan and comparing the performance with opengl

[@daniking7524]

I would like to see WGPU related videos

[@Alexciaooo]

Bel video, ti meriti più iscritti. Io di solito non ci capisco niente anche perchè faccio solo gamedev con Unity, però in questo caso hai spiegato benissimo e ho capito tutto. (I assumed you were Italian, if you don't understand tell me and I'll write the comment in English)

[@lolzdev]

@@Alexciaooo grazie, sinceramente sono molto contento del risultato inaspettato e fa sempre piacere vedere che ci sono anche italiani che vedono i miei video.

[@TheSensationalMr.Science]

2:50 um, I don't think you need the code within initVulkan()... it's already within createInstance(). why not just call createInstance(), initVulkan() instead? do you really need that extra layer of boilerplate within the code? it's still getting initialized in the main app run function. EDIT: 6:31 ohhhhh other things get initialized in there... got it, now that makes sense. Hope you have a great day & Safe Travels!

[@richardsinclair7661]

I actually didn't realize how new Vulkan was. At least in comparison to OpenGL and DirectX. Now I understand why Vulkan support has been such a big deal for games, emulators and so on.

[@pwf2k]

There's actually the OpenGL Debug Output extension, where you can register a debug callback function and listen for errors, performance warnings or notifications. Also the quick switching between the api docs and Vim deserves an epilepsy warning, it's a very harsh difference in brightness in short periods of time and sometimes basically flashing back and forth.

[@mr.mirror1213]

Womp womp

[@pwf2k]

​@@mr.mirror1213 it's too late for a womp womp, when I watched this a year ago, the epileptic seizure I got fractured my ocular synapses 4-dimensionally and caused me to disintegrate into a pile of mushrooms. As a sentient pile of mushrooms, I simply don't understand what this "womp womp" is.

[@kazeroth1234]

I love to see DevLog videos on Graphics Programming, Vulkan, OpenGL, etc... Please continue to make more, I look forward to it!

[@JefersonLimaAlmeida]

Great video :) But take care when switching very fast between white documentation and black terminal :/

[@lolzdev]

Thanks! I know that's kinda fleshy but I realised that too late, the video is speeded so I haven't noticed that until I finished editing. Will check this for sure next time!

[@JefersonLimaAlmeida]

No problem! You are doing a really great job, and your video really make me interested in try to program using Vulkan in the future, I was only a little worried with photosensitive persons watching your video without a warning :/ but anyway thanks for the video

[@seccentral]

:( this. it was very interesting information wise but very painful on the eyes

[@Jacktherookie_]

@@lolzdev At it can cause seizure who is experiencing specific disease.

[@HadesMrDark]

Great video, i don't have a specific topic to suggest, but just seeing more c++ vulkan stuff is interesting, goood luck.

[@hiwhatname4127]

Helped me understand some diffrences between OpenGL and Vulkan, thx!

[@LetrixAR]

Please, use Dark Reader if you are going to switch windows constantly

[@dnull]

see using dark theme all the time made your eyes weak

[@deassisbarroso2515]

Glad your video was recommended to me, I hope to follow your next content. Good first video.

[@lolzdev]

Thanks! I'm going to create more content for sure, I have to think about the topic of the next video tho

[@lennonmclean]

"OpenGL is simple" Yes... Simple...

[@rem_0]

With this switching frequency you need to paste some epilepsy warning at the beginning :D

[@TFSned]

Thanks for making this video. It's good to document some of the common issues you can have writing a Vulkan application from scratch. A problem I had was that my application was selecting the wrong GPU which didn't support the feature I was using. That's because the laptop had an integrated and discrete GPU, but the integrated GPU was given the index 0 and was being selected by default. Filtering the devices by supported features is a great solution.

[@godnyx117]

This may save me ass in the future! Thank you so much for sharing!

[@wetfloo]

doom eternal of all games had the same problem for my friend, I don't know why

[@baileyharrison1030]

It's probably fine to allow the user to select which GPU to use and check for compatibility with just that. If initialisation fails just ask the user to select another GPU from the list of physical devices. Otherwise it can get extremely complicated when you've got required extensions, optional extensions, required features, optional features, and the same for required and optional texture formats. Your program may succeed using the inferior GPU as it satisfies the required features but not the optional ones.

[@nitricswight]

Awesome video, but after learning openGL for the best part of a year, I lost part of my soul when you called it high-level 😞

[@lolzdev]

graphics programming is always a low level topic considering that you're interfacing with hardware but in comparison to vulkan opengl adds a lot of abstractions over the hardware and pipeline. That being said I still use opengl ;)

[@dreastonbikrain1896]

I am too learning OpenGL some months now, and I don't think that you should feel bad at all, if you can accomplish what you are trying to do, then that is the perfect tool for you, I tried Vulkan before OpenGL, and it was just too much for me, with knowledge gained with OpenGL, I think both of us will be able to get into Vulkan if we will have a need for it :)

[@willtheoct]

Don't lose your soul to a video uploader. After skimming his video, he obviously doesn't know what he's doing

[@la694]

omg its jdhs long lost brother

[@noxagonal]

I've been doodling with Vulkan for a while now. I'd say it's difficult but still very logical. The most difficult thing so far has been the memory management. You must create your own memory pool as there's a hard limit of how many memory allocations you're allowed from the GPU driver and it's usually capped at 4000 allocations. All data sent to the GPU requires memory so you must allocate a chunk at a time. Further, there are different types of memory you can allocate, Eg. VRAM, RAM, RAM which is shared with the GPU, VRAM which is accessible to the CPU... Not all systems have all types of memory so you need to check this at runtime. Different memory types can all have widely different alignment requirements, which also varies from system to system. There's also different memory usage cases, generally linear and optimized, where optimized is used for your usual textures with mip mapping and linear with everything else, including non-optimized texture types and buffers. There are also restrictions for what resources can be created on which memory type and which memory types perform best for each usage case, eg. Optimal textures can only be on the VRAM, vertex buffer may be uploaded to VRAM each frame or if the CPU can access the VRAM it may be faster to write it directly. Lot of options here... Good thing is that it's still very logical, it just requires some learning, and there are multiple Vulkan memory pools/managers on github that will work just fine.

[@noxabellus]

jesus christ that sounds like a nightmare

[@noxagonal]

@@noxabellus Hehe. It's not a nightmare if you like solving problems. XD It's low level and pretty much exactly what the developers wanted, if you don't want to deal with its nuances, there are other libraries that build on top of Vulkan. But yeah, it'll take at least a couple of days to create your own memory pool that works properly with Vulkan.

[@abdullahmertozdemir9437]

@@noxagonal like vulkan abstractions?

[@noxagonal]

@@abdullahmertozdemir9437 Not sure where my comment disappeared... But yeah, there's plenty from simple helpers to complete game engines.

[@melficexd]

Three words: Vulkan Memory Allocator. If you don't want to mess with the memory, use the VMA. And that will be it. It will handle memory for you just right.

[@mdev790]

underrated channel, right here

[@random_guy_on_the_internet69]

Very "flashy" video! How do you do that? How do you handle this constant switching between dark and light themes????

[@SamuTheFrog]

My phone is buggin and can't tell if previous comment posted, but it is GNU/Linux with a Window Manager. I'd recommend starting on Ubuntu & installing a window manager, if you are interested. DistroTube on youtube has plenty of vids on window managers. Not possible on Windows.

[@sustachio2246]

Great video! What vim theme are you using? I am looking for a good one right now

[@lolzdev]

it's called gruvbox

[@emirbrkic6649]

Daje fra, fai sentire la presenza italiana in questa community

[@Lukas-qy2on]

feels like an intimidating amount of "boilerplate" but it feels like there is logic underlying it.

[@willtheoct]

"feels like" isn't "has". You can code in vulkan without the bloat and error logging, and if you need a triangle rendered, use regl to do it in a couple of lines.

[@kvbc5425]

my brother, i ain't writing 10k lines for a triangle 💀

[@gabrielmessier]

you gotta admit, it's a cool looking triangle, though.

[@sklonowanykiedymamuta3305]

I was able to do this with 500 lines of code

[@willtheoct]

@@gabrielmessier I've seen better triangles from first time GL programmers. He only needs 10k lines of code for psychological satisfaction

[@921Ether]

nah dont worry you just need a thousand lines of boilerplate for that 💀

[@RealHubertCZGameplayLetsPlay]

Google algorithm has chosen you. It recommended me your video 3 times until i clicked.

[@loldoblender625]

Great video!

[@lolzdev]

thanks!

[@__username1]

The hardest part of vulkan for me is that I never know what to do next because there isn't a single comprehensive and rigorous explanation of vulkan's structure that I've ever seen. Every tutorial either expects you to know stuff already or to follow alonv and ask less questions

[@_erayerdin]

Good video. I wonder, what program are you using to animate in the beginning?

[@lolzdev]

I'm using Xournal++, drawing with the graphics tablet and recording me drawing

[@_erayerdin]

@@lolzdev Thank you so much.

[@zonn8954]

Hey ! Good video thanks What's your configuration ? I mean what distro, desktop environment and overall : what window manager ?

[@Nodal488]

His window manager is DWM, for the rest I couldn’t tell 🙂

[@rokoblox]

Man the worst thing i hate about coding something is getting graphics running especially if i want something simple such as some physics test or whatever Neither of these 2 APIs is easy 💀

[@Caellyan]

You can just use an existing engine then. Godot is pretty good (in C++ land) and you can learn to use VK/GL through modifying it if you need to do it.

[@rokoblox]

@@Caellyan I usually want to run those experiments on bare bones for maximum optimization by only having what I need.

[@melficexd]

Vulkan isn't complex, is elemental, thus people can't get it that easy. The advantage is that it allows for many explicit things that otherwise get overlooked, such as the parallelism GPU-CPU, in fact, if you can get that right, you have half of the victory with Vulkan. Amortize the rendering time with further processing. The other half is taking advantage of GPU parallelism, which Vulkan eases quite a bit too

[@SanoKei]

what program is the drawing thing with the grid?

[@lolzdev]

it's xournal++

[@ilprogrammator]

Per caso segui jdh? lo stile mi sembra molto simile, e mi piace molto. Complimenti per il video!

[@lolzdev]

sì lo seguo, come avrai notato nei commenti molte persone si sono accanite avendo notato questa somiglianza anche se come ho già spiegato semplicemente usiamo gli stessi tool e ciò fa sembrare il video simile ma l'esposizione è diversa. Comunque grazie :)

[@albatroshd7945]

Maniac, Programming in Vim, not bad 👍🏽

[@daniking7524]

Awesomeee

[@joshuaheathcote2116]

How the hell do you use vim like that! You're like the VIM professional!

[@talhagenc9401]

I sense 50% Indianness from this dude.

[@MrBlackspoon]

elon musk incoming

[@debdutchakraborty8987]

🤣

[@dorktales254]

I guess he is big indian...

[@CatChrist]

That means he knows what he's talking about. I'm sold.

[@giacomol02]

He sounds Italian

[@Caellyan]

I love how CMake is 1/8 of the video. Very realistic 🤣🤣🤣

[@willtheoct]

well he didn't do very much so...

[@mrdiabeatis9943]

Jdh?

[@enriquedelacal2814]

Why do you mischaracterize opengl like that

[@LavaHoleD]

Based

[@nellfs]

Very cool! What wm are you using?

[@lolzdev]

thanks! It's dwm btw

[@TheoParis]

@@lolzdev nice, just switched to dwm myself

[@jizosgoescrazy]

hey! what IDE is this?

[@lolzdev]

it's not an ide, I'm using a text editor and it's just vim

[@nrdybhu1560]

I likey the video

[@Chu4hun]

coding time lapse is wery flashy

[@lLenn2]

"OpenGL is high-level" lmao 🤣😂🤣😂🤣😂🤣😂🤣😂

[@tanveerasif5978]

Bro, you're the running with speed of flash, I am not able to catch even with the speed 0.25X. 😅 May be sharing your code can help me if possible.

[@The6DAZ6]

Just discovered this channel... Is this an italian accent?

[@lolzdev]

yes lol

[@The6DAZ6]

@@lolzdev Gotcha! I'm italian too. Nice video man, keep up with the good work. I'm also a (junior) developer too, is there any resource you can suggest me to learn this topic (I was considering for example making a tetris clone using the canvas API by OpenGL just to start)

[@lolzdev]

I learnt basics of graphics programming from learnopengl.com it's a good resource imo

[@dreastonbikrain1896]

Is graphics programming your job? Or is it more a hobby?

[@lolzdev]

definitely an hobby, I'm in high school

[@lija-everything]

jdh sounds kinda strange in this one did he catch a cold or smth

[@mr2meows]

the title and thumbnail are opposites

[@XkelloggmanX]

Holy seizures Batman!

[@ari_archer]

I hate how you use easy and simple interchangeably, it's my biggest pet peeve lol

[@lolzdev]

I didn't really know the difference lol, thank you for letting me know, I have to improve my speaking

[@ari_archer]

​@@lolzdev nah dw lol, good video, it's just my nitpick, I have a huge pet peeve of easy = syntax and simple = logic E.g. asm = simple, python = easy :)

[@chakibchemso]

noice vid

[@alopmemes1964]

is my guy polish?

[@lolzdev]

nah, italian

[@solindek]

fajnie jak by był polakiem :)

[@kvbc5425]

też tak myślałem

[@daniking7524]

Now a wgpu tutorial pls

[@Volian0]

I would use vulkan, but sadly... not every old GPU supports it, older android phones don't support it, and that's why I'm using OpenGL ES, it's simple and has everything I need. Maybe I lose performance, but so what? I'm making a simple game, not a cyberpunk sequel

[@birdbeakbeardneck3617]

are u jdh?

[@joelm2858]

0:26 - How are you writing your letters? jesus 😂

[@cheeky6114]

this youtube account seems familiarly?

[@greanplayer]

jdh

[@cheeky6114]

@@greanplayer i know

[@deleted_handle]

3:35 wtf my eyes

[@athrixxs]

jdh ahh

[@Zero-id1yy]

In my Personal opinion vulkan isnt hard, just tedious

[@Siissioe123]

I hear an italian accent?

[@discretemathematicso]

Vulkan is overkill unless your a big game company and making games with lost of eye candy, i dont know what you were trying to show with all that code, too quick to follow and furthermore nothing learned

[@naninoni7086]

Literally a JDH video…

[@Soullessrun]

SO FUCKING LOUD AUDIO

[@sannfdev]

Walmart jdh

[@remuswt1035]

jdh wanna be

[@AlFredo-sx2yy]

mfw stolen content

[@EesaSharma]

Bro is copying JDH BIG TIME. NeoVim, even the same music playing

[@VmsCentral]

If the author does not mind - source that was shown in the video can be took from GitHub gist 0ae55199763301db7d8e5b8a1716d91b

[@lolzdev]

wow, this is impressive! ofc I don't mind, this is a nice thing since I don't even have the code base anymore

[@x1expert1x]

what the hell is wrong with youtubes user interface, its flickering and sh*t