Magnum::Text::FreeTypeFont class

FreeType font plugin.

Uses the FreeType library to load fonts of the following formats:

This plugin provides the TrueTypeFont and OpenTypeFont plugins.


This plugin depends on the Text and FreeType libraries and is built if MAGNUM_WITH_FREETYPEFONT is enabled when building Magnum Plugins. To use as a dynamic plugin, load "FreeTypeFont" via Corrade::PluginManager::Manager.

Additionally, if you're using Magnum as a CMake subproject, bundle the magnum-plugins repository and do the following. Using FreeType itself as a CMake subproject isn't tested at the moment, so you need to provide it as a system dependency and point CMAKE_PREFIX_PATH to its installation dir if necessary.

add_subdirectory(magnum-plugins EXCLUDE_FROM_ALL)

# So the dynamically loaded plugin gets built implicitly
add_dependencies(your-app MagnumPlugins::FreeTypeFont)

To use as a static plugin or as a dependency of another plugin with CMake, put FindMagnumPlugins.cmake into your modules/ directory, request the FreeTypeFont component of the MagnumPlugins package and link to the MagnumPlugins::FreeTypeFont target:

find_package(MagnumPlugins REQUIRED FreeTypeFont)

# ...
target_link_libraries(your-app PRIVATE MagnumPlugins::FreeTypeFont)

See Downloading and building plugins, Plugin usage with CMake, Loading and using plugins and File format support for more information.

Behavior and limitations

The fillGlyphCache() function expects a PixelFormat::R8Unorm glyph cache. If the format doesn't match or the glyphs can't fit, it prints a message to Error and returns false.

For font formats that support it, glyphName() and glyphForName() provides mapping between glyph IDs and names.

The FreeType library alone doesn't provide any advanced shaping capabilities, thus AbstractShaper::setScript(), setLanguage() and setDirection() are a no-op and return false. You're encouraged to use the HarfBuzzFont plugin if you need these.

While FreeType provides access to font kerning tables, the plugin doesn't use them at the moment. The feature list passed to AbstractShaper::shape() is ignored.

Base classes

class AbstractFont
Base for font plugins.

Derived classes

class HarfBuzzFont
HarfBuzz font plugin.

Public static functions

static void initialize()
Initialize FreeType library.
static void finalize()
Finalize FreeType library.

Constructors, destructors, conversion operators

FreeTypeFont() explicit
Default constructor.
FreeTypeFont(PluginManager::AbstractManager& manager, const Containers::StringView& plugin) explicit
Plugin manager constructor.