Nitro Texture Compressor for compression 4x4 blocks

[MetLob]

Hi, I implemented compression of 4x4 texels. Medium quality, but not long time.

Example of this algorythm on photo-quality image:

• Original

• Compressed

Example of this algorythm on NDS (not-compressed Color256 8-bit indexed) image:

• Original

• Compressed

## Using

Ekona.Images.NitroTextureCompressor.Compress(byte[] bgra, uint width, uint height, bool boundaryApprox, bool onlyInterpolatedPalettes, out byte[] palette)

Where:
bgra - original 32BPP data in ARGB format (first byte - B, G, R, A - last byte)
width, height - size of original image
boundaryApprox - using mask, which ignored inside pixels in 4x4 block, using only boundary pixels
onlyInterpolatedPalettes - generates palettes only in 1 or 3 Nitro-texture-palette formats (see code of TEX0 in plugins)

WARNING
If output palettes length / 4 > 0x3FFF then some pixels has invalid palette index.

[pleonex]

That's a huge contribution thanks!
Sorry for the delay, I am quite busy these days, I will review the code as soon as possible (really interested to see how it works).

[pleonex]

I have been reviewing it. Awesome job! I have some comments:

• There are a lot of comments in a non-English language. I would like that new code and comments are only in English. Can you translate them? If it's a lot of work, what about removing the comments for now?
• The Vector3 class is large (~1000 lines of code). What about if you move the class to a separate file Vector3.cs in the same folder?
• Method names should have the first char in upper case (e.g.: Saturate instead of saturate). There are a few that don't follow this convention.

[MetLob]

Yes. Ok. I will refactor of the code in a nearest time.
Vector3 from my oldest math-core library and has Russian comments, and the Nvidia code grabbed from C++ source without refactoring.

Can I put the Vector3 class file to Ekona.Helper namespase?
.

[pleonex]

I think that Vector3 class should be in Ekona.Images class so we can reuse it for future 3D model implementations. And don't worry about the Russian comments, I understand, Tinke has still some Spanish comments from old times that I should translate.

[MetLob]

I pushed with refactoring of this.