DDS: 3D image data contains only the first image

[kristiker]

Image file: tests/Pfim.Tests/data/TestVolume_Noise3D.dds, loaded with Pfimage.FromFile(ddsFile, new PfimConfig(decompress: false))

gives you access to the first depth layer only. The texture is 64x64x64(x4), but image.Data.Length is 64x64(x4). Note that I am not trying to decompress the DDS.

I'm not too bothered by this. Mostly noting the issue down.

[nickbabcock]

Nicely found. You're right that mipmaps aren't considered when decompression is skipped. I think it should be able to be supported via the same MipMaps API that is currently exposed