Able to create skin font by list of chars.

[andy840119]

Even if #527 is not implemented, it's still able to do this issue.

The issue will be separated into two parts:

• think about how to collect all the font usage and text in lyrics and notes. e.g: might create something like dictionary<fontUsage, chars[]>
• should have a way to export the .fnt file and its image files.

[andy840119]

got the fuckng idea:

• move font into skin/font.
• let FontManager inherit ArchiveModelManager<FontInfo, FontFileInfo>

update:

• maybe should cancel the second one because not really sure stores the font into the database or real path (consider that the user might lot of fonts?)...

[andy840119]

And the FontManager is aimmed:

• import and save the fonts (with .fnt format now, might able to support .otf ).
• Get GlyphStore by font manager. (remove exist GameHostExtension)
• Export font?
• Export font with target charset -> not really sure what the format is

[andy840119]

And should have processer:

• to convert CharacterGlyph (or TextureUpload) back to characters.
• should be able to generate .fnt text file.
• should be able to generate images by list of characters.

have no idea about the architecture.

[andy840119]

And see this article to understanding some magic property like:

• xoffset = how many pixels to shift the character right (= extra blank pixels to left of character)
• yoffset = how many pixels to shift the character down (= extra blank pixels above character)
• xadvance = total width of character in pixels (so adds xadvance-xoffset-width extra blank pixels to the right of character)

guess still need to got a demo picture 😢

[update]

Have a picture now, not really sure it's correct but better than none.

[andy840119]

And about how to placing most characters into single image (1024*1024)
should googling font pack algorithm C#

here are some useful links:

• http://www.codeimmunity.com/TextFx/making_a_font.php
• https://jvm-gaming.org/t/gdx-fontpack-yet-another-font-packer/43218 (font packer implementation)
• https://discourse.mcneel.com/t/2d-bin-packing-implementations/76320 (C# algorithm)

[andy840119]

https://ttf2fnt.com/
just a meno:
this is the website to convert .ttf into .fnt

ppy/osu-framework#5994
And maybe can use thie algoritm to reduce the image size?
Also, not very sure should create another package for packing the image to .fnt format?