Texture compression howto

Pesegato · August 7, 2015, 9:34am

Hi there,
my game eats about 2Gb RAM. That’s because I load two 8000x8000 textures. Is it possible to use some texture compression? I haven’t found anything about it on the wiki

Empire_Phoenix · August 7, 2015, 10:32am

yes and no

dds for compression on the graficcard but large on disk and memory
jpg/png for the exact opposite

Pesegato · August 7, 2015, 12:57pm

I tried with DXT1 which works ok, but doesn’t have alpha.

So I tried with DXT3 and got this:

I guess that’s gpu/driver dependant then…

AF · August 7, 2015, 1:08pm

Why do you have to use 8000×8000 for a 2d game? I have a 3d game and Im fine using 2048x2048 for the walls and the floors

Try using image resizer, you can find them tons on google

Pesegato · August 7, 2015, 1:58pm

The large texture is actually a sprite sheet, where hundreds of individual sprites are stored.

Empire_Phoenix · August 7, 2015, 2:08pm

only use dxt1 and dxt5 all others are crap.
Try dxt5

Pesegato · August 7, 2015, 2:37pm

Tried with this:

And got this:

Momoko_Fan · August 7, 2015, 6:42pm

Does this image open in GIMP? If it shows correctly it could have something to do with how jME3 interprets it. Consider posting a bug report on GitHub.

bloodwalker · August 7, 2015, 6:53pm

I had the same issue with my mac and it was due to the graphics card since it’s Intel

Pesegato · August 24, 2015, 7:53am

I think it’s this. Will try on my old geforce just to be sure…

Yes

Empire_Phoenix · August 24, 2015, 8:26am

Also, is the image power of two? or is it rally 8kx8k instead? dxt does not support anything else.

Pesegato · August 24, 2015, 9:11am

Nope, is 8000x8000!
However, dxt1 works ok (but doesn’t support alpha which I need).

Momoko_Fan · August 24, 2015, 1:55pm

Does it happen on Intel only or on other GPU vendors as well?

bloodwalker · August 24, 2015, 3:14pm

It happens on Intel integrated graphics cards for me. However, on Windows it seems to work a little better than on Macs or Linux.

It is not a JME issue though. In my case I also tested with Unity on Mac and the texture had the same problem.

david_bernard_31 · August 24, 2015, 3:42pm

From I previous experiment with DDS, imagemagick and gimp never generate good result. Try nvidia tools : nvcompress

github.com

davidB/jme3_ext_assettools/blob/master/assets_publisher0/build.gradle#L71


		into {unarchiveDir}
	}
	task convertToLowercase(type : Copy) {
		from unarchiveDir
		exclude { it.getName().toLowerCase() == it.getName() }
		rename { it.toLowerCase()	}
		into unarchiveDir
	}
	task convertToDDS(type : Copy) {
		from unarchiveDir
		into unarchiveDir
		include('**/*.TGA', '**/*.tga')
		//include('**/*.PNG', '**/*.png')
		eachFile { FileCopyDetails fcd ->
			println "convert to dds ${fcd}"
			//on windows:
			//commandLine 'cmd', '/c', 'nvcompress'
			def cmd = ["nvcompress"]
			if (fcd.name.indexOf("_ddn.") > 0) cmd += "-normal"

Pesegato · August 25, 2015, 6:24am

Geforce 8600m working OK.

However, given my previous experiments, I think that newer GPU (Haswell etc) work better overall and might support DDS properly.

Will try with nvidia tools.
EDIT:
nvcompress always respond with:

The file ‘pppp.png’ is not a supported image type.

Also tried with a 512x512 solid white .png just in case squareness or alpha were an issue, still got the same error.

Empire_Phoenix · August 25, 2015, 9:39am

I use a own custom dds converter, that is loosely based on nasa worldwind, I could try to throw it trough it and see what happens. So far I never had problems with the textures created by this (not even on a i3 integrated gpu).

Pesegato · August 25, 2015, 9:48am

Would gladly test. And if it works and you allow me to freely use it, the better

EDIT:

I have a i5 sandy bridge GPU. The problem here is the “generation” of the GPU, rather than the i3-i7 diversification. Haswell GPU works pretty well (besides supporting OpenGL 4.3);

Sandy bridge (and earlier) either have hardware or driver bugs.

Pesegato · August 26, 2015, 1:08pm

@david_bernard_31 could you please send me a texture (with alpha!) built with nvidia tools so that I can try it? Thanks!

@Empire_Phoenix the same!

Empire_Phoenix · August 26, 2015, 4:21pm

https://www.visiongamestudios.com/knowledge/download/attachments/950275/eye.dds?api=v2
Note, it’s part of my logo, and not for any other use than testing your problem.