[WIP] Add new TTF renderer

[fkaa]

Work in progress, opened for feedback.

Synopsis:

• Added new TTF font renderer
  • Uses either Freetype or stb_truetype depending on if USE_FREETYPE is defined
  • Does rectangle packing via stb_rect_pack
  • Adds the following files:
  • src/stb_rect_pack.h – Packs rects into a bin (Public domain)
  • src/stb_truetype.h – Loading & rasterising font glyphs (Public domain)
  • src/font.c – Contains loading/drawing of fonts & glyphs, should be wrapped before using
  • src/lua_font.h – Wraps the above functions for use in lua
  • Touches the following files:
  • CMakeLists.txt – Freetype & maintenance
  • include/common.h – Adds font functions and structures
  • src/lua_fetch.h – Adds support for fetching fonts
  • src/lua.c – Adds lua wrapper functions
  • pkg/iceball/lib/font.lua
    • Adds a font_ttf_new function which takes a font path as its argument
    • Returns a table which has the following functions:
    • draw(x, y, size, string, color) – Draws a string at x, y with the given size and color
    • line_height(size) – The line height of font face with a given size
• Added UTF-8 library for lua, licensed same as lua (MIT)
  • Accessed as utf8 in global scope
  • Also accessible in sandboxed environment (any potential dangers?)
  • Documentation here
  • Adds the following files:
  • src/lutf8lib.c – Contains library functions and luaopen_utf8
  • src/unidata.h – Generated unicode data
  • Touches the following files:
  • include/common.h – Adds font functions and structures
  • src/lua.c – Registers the library in the Lua state(s)
  • pkg/base/sandbox/main.lua – Transfers the utf8 library to the sandbox

TODO:

• Add more options to draw strings (entered, right-to-left, origin point)

[NotAFile]

After the fuzzing rakiru did, I'd be extremely reluctant to use stb_* libs in any kind of security critical context...

[arsdragonfly]

why close?