Reduces size used for png files from 13,366,660 bytes to 13,055,285 bytes in total. Changes size used for oramap files from 2,601,027 bytes to 2,605,779 bytes in total (contained PNGs are smaller, but the oramap zip wrapper didn't compress as well). This slight filesize improvement doesn't noticeably impact loading times.
zopfilpng is used for compression with the following command line:
'zopflipng.exe -y -m image.png image.png'
This follows on from 78bef8a98f and bc5e7d1497. Except now that the PNG decoder supports bit depths of 1, 2 or 4 we don't have to preserve the original bit depth of the image, allowing for more compression.
The oramap files were updated by:
- Running utility command "<mod> --unpack-map unpack" for each mod.
- Compressing the png files using the command above.
- Running utility command "<mod> --unpack-map repack" for each mod, except in Map.Save the line `if (!LockPreview) { var previewData = ...` is replaced with `if (false) { var previewData = ...` to save the existing optimized image on disk rather than generating a fresh preview.
I noticed even on a naval only map, the naval AI doesn't necessarily beat a Normal AI. This makes it much more likely that it will.
- Drop number of ore refineries and ore trucks. As Naval AI is mostly suited for islands I haven't found a map that really needs as many as the other AIs.
- Reduce number of ground based base defenses - and delay Tesla coil a lot.
- Reduce number of migs as yaks more useful if they just get blown up.
- Add Flak trucks and v2s for base defense for Soviet
- Add Jeep and Arty for base defense for Allied
- Add delay for building ore truck so now chance of building one first from War Factory
- A service depot is not useful for this AI except for building an MCV so delay it a lot.
Tested with Ukraine and Germany and can consistently beat normal on island map.
Reduces size used for oramap files from 2,774,405 bytes to 2,614,332 bytes in total. The smaller files also improve loading times as the zlib decoder has less bytes to schlep through.
The PNG decoder shipped with OpenRA only supports a bit depth of 8 for images with a palette, so must must ensure that other depths (1,2 or 4) are not used.
zopfilpng is used for compression with the following command line:
'zopflipng.exe --keepcolortype -y -m image.png image.png'
The keepcolortype flag ensures the bit depth is not changed.
The oramap files were updated by:
- Saving as a folder, unpacking the data in loose files.
- Compressing the png files using the command above.
- Saving back as an oramap, except instead of regenerating the map preview on save we save the existing version on disk.
Reduces size used for png files from 19,034,446 bytes to 13,305,798 bytes in total. The smaller files also improve loading times as the zlib decoder has less bytes to schlep through.
The PNG decoder shipped with OpenRA only supports a bit depth of 8 for images with a palette, so must must ensure that other depths (1,2 or 4) are not used.
zopfilpng is used for compression with the following command line:
'zopflipng.exe --keepcolortype -y -m image.png image.png'
The keepcolortype flag ensures the bit depth is not changed.
