PSP Fontfuck Library

This file is a reversed version of TPU's libfont.prx (fontfunk) library

Based on the libfont.prx binary, with reference to hz86/mgspw, a locolization plugin for Metal Gear Solid: Peace Walker

Constants and Struct Definitions are from PPSSPP & hz86/mgspw & Web.

Build

1. Set up PSPDEV environment
2. Run make

Usage

1. Replace the origin libfont.prx with the built one
2. Rename your custom font and put it at USRDIR/fonts.pgf
3. Get a replica of oldfont.prx and put it at USRDIR/oldfont.prx

How to Get oldfont.prx

1. Decrypt the original libfont.prx in the game using Linblow/pspdecrypt
2. Edit it in a hex editor. Find the sceLibFont string ( in segment_2 )( in .rodata, referenced in .lib.ent ) and change it to sceLibFttt.
3. Rename it to oldfont.prx

How does it work?

The only two things PSP Kernel use to identify a function exported by a moudule is its export name referenced in .lib.ent and the fucntion NID.

Thus we can create a moudule with the same export name and function NIDs to substitute the original module, and bridge between the game and original module by loading and calling functions in the original module as long as the original module's export name has been changed to an unused value.

Description of Files

• ftttlib.h & ftttlib,S contains information from the modified oldfont.prx

• exports.exp is used to generate export entries of the fontfuck library.

• fontfuck.c is the main file. It wraps and modifies the behavior of 3 functions in sceLibFont

Test

• The Library was tested on PSP Hardware.
• PPSSPP artifacts in this PR works fine.
• jpcsp doesn't seem to work