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.
This command allows either unpacking oramap files into folders, or packing folders into oramap files.
Example invocations:
"d2k --unpack-map unpack" to unpack maps of the d2k mod into folders.
"cnc --unpack-map repack" to repack maps of the cnc mod into oramap files (but will only pack folders that were unpacked previously).
The PNG decoder, when dealing when indexed images with a palette, could only decode a bit depth of 8. Teach it to decode depths of 1, 2 and 4 as well. As the palette data is exposed to consumers of the PNG class, unpack the data into a 8 bit depth so consumers don't need to also handle the new bit depths.
This allows the LINQ spelling to be used, but benefits from the performance improvement of the specific methods for these classes that provide the same result.
This rule no longer appears to be buggy, so enforce it. Some of the automated fixes are adjusted in order to improve the result. #pragma directives have no option to control indentation, so remove them where possible.
