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[shardana]

Thanks Benitomuso!

[hello]

The four modes are the same as the four modes in png, just with a few minor differences I am trying to figure out why I have glitches.

Did you manage to figure out what causes these glitches? Doesn't look like a simple problem...

[Stainless]

I have 23 images in this format, my code loads 22 of them perfectly. One has a glitch.

It seems to be an initial value problem.  When you start a new line of the graphic, some modes seem to expect the first pixel to be set to zero, some seem to expect it to be set to the same value as the pixel above.

It makes no sense at all

Code: [Select]

                for (int y = 0; y < height; y++)
                {
                    if (mode[y] < 4)
                    {
                        r = g = b = 0;
                    }
                    for (int x = 0; x < width; x++)
                    {
                        #region Decode
                        switch (mode[y])
                        {
                            // none
                            case 0:
                                r = br.ReadByte();
                                g = br.ReadByte();
                                b = br.ReadByte();
                                a = 255;
                                break;

                            // sub
                            case 1:
                                r += br.ReadByte();
                                g += br.ReadByte();
                                b += br.ReadByte();
                                a = 255;
                                break;

                            // up
                            case 2:
                                b = data[pos - prev];
                                g = data[pos - prev + 1];
                                r = data[pos - prev + 2];

                                r += br.ReadByte();
                                g += br.ReadByte();
                                b += br.ReadByte();
                                a = 255;
                                break;

                            // average
                            case 3:                             
                                r = Average(r, data[pos - prev + 2]);
                                g = Average(g, data[pos - prev + 1]);
                                b = Average(b, data[pos - prev]);
                               
                                r += br.ReadByte();
                                g += br.ReadByte();
                                b += br.ReadByte();
                                a = 255;
                                break;

                            // paeth
                            case 4:
                                if (pos < prev + 4)
                                {                                   
                                    r = (byte)paethPredictor(r, data[pos - prev + 2], 0);
                                    g = (byte)paethPredictor(g, data[pos - prev + 1], 0);
                                    b = (byte)paethPredictor(b, data[pos - prev], 0);                                   
                                }
                                else
                                {
                                    if (x > 0)
                                    {
                                        r = (byte)paethPredictor(r, data[pos - prev + 2], data[pos - prev - 2]);
                                        g = (byte)paethPredictor(g, data[pos - prev + 1], data[pos - prev - 3]);
                                        b = (byte)paethPredictor(b, data[pos - prev], data[pos - prev - 4]);
                                    }
                                    else
                                    {
                                        r = (byte)paethPredictor(data[pos - prev + 2], data[pos - prev + 2], data[pos - prev - 2]);
                                        g = (byte)paethPredictor(data[pos - prev + 1], data[pos - prev + 1], data[pos - prev - 3]);
                                        b = (byte)paethPredictor(data[pos - prev],     data[pos - prev],     data[pos - prev - 4]);
                                    }
                                }
                                r += br.ReadByte();
                                g += br.ReadByte();
                                b += br.ReadByte();
                                a = 255;
                                break;

                        }
                        #endregion

                        data[pos++] = b;
                        data[pos++] = g;
                        data[pos++] = r;
                        data[pos++] = a;

                    }
                }

Two images of my test app, the left window is the RGB texture, middle the alpha mask, right the combination.



And here is the one graphic with a glitch

[Stainless]

sorted



This code makes me think the developer was either mad, or bordering on genius.

It's basically all the front end filtering that PNG does, but without the compression. So you end up with a file that is bigger than a standard tga file, but will compress better if zipped up.

So I guess it must be compressed in the install package, which makes all the encoding worthwhile.

[hello]

Great! Impressive progress! Does this mean you can also write the image format? The format makes sense for the sfs files that contain all the ingame textures.

[SAS~Storebror]

Actually the game does read uncompressed TGA files too, so I'm wondering what might be the reason to re-invent the wheel for the developer?
As much as I see it, an uncompressed TGA compresses just as good as IMF files do, it usually even ends up to be a few bytes smaller.

Best regards - Mike

[Stainless]

Yes you are correct, this format is useless to modders. However some of the standard textures are in this format so I do need to be able to read it.

[Stainless]

I've added a texture browser dialog. At the moment it just lets you invert an image.

I have to invert textures a lot, not sure why but they always seem to be upside down for me.

I can add other functionality later if required

Can someone tell me why all the mods I look at have holes in the textures? Looks like they have been attacked by moths.

[SAS~Malone]

sounds like the damage textures are showing, maybe?
also being a coding noob, i can't offer any real advice, but i'm very impressed with the work you are doing - keep it up!

[hello]

sounds like the damage textures are showing, maybe?

Yes,very likely. Any progress? Can't wait to try this tool myself.

[benitomuso]

+1

[Stainless]

I've been earning money the last few days, sorry 

I have just finished the job and will have a couple of days free to do some more.

Whatever state it is in on Sunday, I will publish it so you guys can start playing with it and come up with bug reports and feature requests.

It is not finished, it's probably going to crash a lot, but I'll keep working on it when I get chance.