freetype_textdraw demo program

freetype_textdraw is demo program developed to learn how to use library Freetype to draw any text.

Features

Draw some text with customizations:

• select font file to draw
• enable/disable kerning
• enabled/disable ligatures
• enable/disable text antialiasing
• enable/disable hinting
• change font size
• change gamma of antialiasing
• change text or background color

Please note that library HarfBuzz is required to implement ligatures and kerning. Also for selected font you can see for which languages there is a full set of glyphs.
The most important: you can study sources of this project to write your own.

LICENSE

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

Dependencies

cmake, Freetype, HarfBuzz (optional), Qt5.

Build Instructions

Follow standard cmake build instructions:

• make build directory:

    # mkdir build
    # cd build

• call cmake to configure:

    # cmake -DCMAKE_BUILD_TYPE=Debug -DUSE_HARFBUZZ=ON ..

To omit HarfBuzz support replace "-DUSE_HARFBUZZ=ON" with "-DUSE_HARFBUZZ=OFF", but you lost ligatures and kerning features in modern fonts!

• call make to build:

    # make

Screenshots

• Main window
• Antialiasing
  • Without antialiasing:
  • With antialiasing:
• Kerning
  • Kerning disabled:
  • Kerning enabled:
• Ligatures
  • Ligatures disabled:
  • Ligatures enabled: