Silk.NET•3y ago

I keep forgetting what it's called

KaiOP•1/8/23, 12:01 PM

But is great

KKai I keep forgetting what it's called

Aqua•1/8/23, 12:26 PM

ktx?

RRedhacker2 I would move to something like QOI with zstd compression.

Aqua•1/8/23, 12:29 PM

is it decompressable on the gpu though? that's the real advantage of DDS and KTX. because they are stored compressed in vram you can fit a lot more textures in gpu memory, with the only caveat being that you get a bit of a reduction in image quality if you view the textures up close.
can't say for 2D games, but for 3D games DDS or KTX with ST3-ST5 (idk what KTX uses, i think some khronos format) compressed textures is absolutely the format I would recommend any game ships with.

Aqua•1/8/23, 12:30 PM

and basically every modern GPU on the planet can decompress that in hardware

Aqua•1/8/23, 12:30 PM

so compatibility shouldn't be much of an issue unless you're targetting a voodoo3 or something

Aqua•1/8/23, 12:33 PM

QOI looks like a neat image format but probably not one I would recommend for games, unless you don't plan to use GPU compressed textures at which point it seems like its a decent option

AAqua is it decompressable on the gpu though? that's the *real* advantage of DDS and K...

Redhacker2•1/8/23, 12:44 PM

Really it depends on what you're going for. GPU compression isn't always the best option

Aqua•1/8/23, 12:44 PM

certainly not for 2D games, no.
but for 3D games it's pretty much a no-brainer, unless you're going to be staring at the textures extremely close up

Redhacker2•1/8/23, 12:45 PM

Take UI elements or pre-baked font atlases/texture atlases

AAqua certainly not for 2D games, no. but for 3D games it's pretty much a no-brainer, ...

Redhacker2•1/8/23, 12:45 PM

That's not all that uncommon in 3D games

KaiOP•1/8/23, 12:46 PM

KTX2 is what I ment

Redhacker2•1/8/23, 12:46 PM

But typically the quality even so is good enough to be worth doing

KaiOP•1/8/23, 12:47 PM

KTX2 is like a container format. Various other things can be inside. Most are also part of vulkan, and are likely supported on the GPU natively

KKai KTX2 is like a container format. Various other things can be inside. Most are al...

Redhacker2•1/8/23, 12:47 PM

I was just referring to a standard .pak or .vpk file

Redhacker2•1/8/23, 12:47 PM

That could just store arbitrary data

AAqua QOI looks like a neat image format but probably not one I would recommend for ga...

Redhacker2•1/8/23, 12:50 PM

And really most people don't need GPU compressed textures, I don't even know of a good way to write them to disk from standard image formats (and I prefer being able to parse the texture data on the CPU side first anyway, so it does not really give me much to have GPU compressed textures I would then decompress lol)

RRedhacker2 That's not all that uncommon in 3D games

Aqua•1/8/23, 12:50 PM

yes, you do have to make some tradeoffs though
if you want the most realistic looking game in the world then you'll probably have to use uncompressed textures, and then use sparse texturing on top of that if you want to load them all at once
but for most usecases a bit of quality loss is fine

Redhacker2•1/8/23, 12:50 PM

It also wouldn't surprise me if the GPU already compresses the texture data into a native format transparently

Aqua•1/8/23, 12:51 PM

far as i know gpus use whatever it is you give them
it's the reason why you tell it the texture format

Aqua•1/8/23, 12:51 PM

GPU compressed textures have a load of uses

AAqua far as i know gpus use whatever it is you give them it's the reason why you tell...

Redhacker2•1/8/23, 12:51 PM

That doesn't mean they Don't transform it into their own internal representation

Redhacker2•1/8/23, 12:52 PM

Trying to reduce space utilized transparently

AAqua GPU compressed textures have a load of uses

Redhacker2•1/8/23, 12:53 PM

I'm not disagreeing, in fact, even for realistic open worlds, i think is still probably a good usecase

Redhacker2•1/8/23, 12:54 PM

They don't look that bad compared to the originals

Redhacker2•1/8/23, 12:54 PM

Of course again, I would prefer to parse everything into RGBA on CPU anyway so I don't get anything from GPU compressed textures

Redhacker2•1/8/23, 12:55 PM

But that's me personally

Aqua•1/8/23, 12:55 PM

based on the fact that my game is a large open world I do have a bias towards gpu compressed textures

Aqua•1/8/23, 12:55 PM

also from what i've seen gpu compressed textures are a bit faster as well since there's less data, both when it comes to drawing the texture itself and also transferring from cpu to vram

Pio•1/8/23, 1:26 PM

I need some help with assimp, I'm trying to limit bones used by meshes to 6 so I did this:

var ps = _assimp.CreatePropertyStore();
_assimp.SetImportPropertyInteger(ps, "PP_SBBC_MAX_BONES", 6);
var scene = _assimp.ImportFile(path, (uint)Assimp.PostProcessSteps.SplitByBoneCount);

var ps = _assimp.CreatePropertyStore();
_assimp.SetImportPropertyInteger(ps, "PP_SBBC_MAX_BONES", 6);
var scene = _assimp.ImportFile(path, (uint)Assimp.PostProcessSteps.SplitByBoneCount);

however meshes still have more than 6 bones, am I applying the property the wrong way?

AAqua also from what i've seen gpu compressed textures are a bit faster as well since ...

Redhacker2•1/8/23, 1:32 PM

not suprising

Redhacker2•1/8/23, 1:32 PM

idk, I just like being able to uncompress the texture on the CPU and send it in RGBA to the GPU

KaiOP•1/8/23, 1:40 PM

I mean sure, but you have worse performance for no reason

Aqua•1/8/23, 1:40 PM

Redhacker2•1/8/23, 1:41 PM

again, I just like doing it

KKai I mean sure, but you have worse performance for no reason

Redhacker2•1/8/23, 1:41 PM

that's fine, performance is still nowhere near terrible even still

Redhacker2•1/8/23, 1:41 PM

and how many times are you loading textures from disk repeatedly

Aqua•1/8/23, 1:42 PM

in an open world game you can do it rather frequently

Redhacker2•1/8/23, 1:42 PM

and most of the time even removing them from GPU

Aqua•1/8/23, 1:42 PM

also the performance is the gpu performance

Aqua•1/8/23, 1:42 PM

not the loading performance

AAqua in an open world game you can do it rather frequently

Redhacker2•1/8/23, 1:42 PM

depends on the Open world game

Redhacker2•1/8/23, 1:42 PM

ultimately for me doing it is not that big an issue.

RRedhacker2 and how many times are you loading textures from disk repeatedly

KaiOP•1/8/23, 1:43 PM

Your texture is also using more memory with no gain in quality. Data that's been uncompressed from a lossy format inherently stores useless information.
And that then eats into memory throughput & usage for no reason

KKai Your texture is also using more memory with no gain in quality. Data that's been...

Redhacker2•1/8/23, 1:43 PM

good thing I don't use lossy formats

RRedhacker2 You could go full for lack of a more professional term "balls to the walls" and ...

Hanprogramer•1/8/23, 1:44 PM

This is what I've been thinking of doing. Since that way it's easier to pack and I can automate most parts since i use a custom editor GUI app thingy. My game engine is 2d only for now and focuses on 2d. So i think i could do it in raw bytes yeah just for faster startup time (on final builds) but when in editor just load the raw PNGs or JPEGs or etc.

Hanprogramer•1/8/23, 1:45 PM

also most of my textures will be auto packed to single atlas or few atlases by the editor

KKai Your texture is also using more memory with no gain in quality. Data that's been...

Redhacker2•1/8/23, 1:45 PM

after all, if I am going to send an image in RGBA to the GPU, why would I create lossy versions of textures to store on disk

Aqua•1/8/23, 1:46 PM

because then you can upload it to the gpu in a compressed format so it uses less vram and gives a (slight) performance boost?

AAqua because then you can upload it to the gpu in a compressed format so it uses less...

Redhacker2•1/8/23, 1:46 PM

not if I am going to uncompress it before loading it on GPU... like I previously stated would prefer to do...

I keep forgetting what it's called

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