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1.4 KiB
1.4 KiB
imgui_freetype
Build font atlases using FreeType instead of stb_truetype (which is the default font rasterizer).
by @vuhdo, @mikesart, @ocornut.
Usage
- Get latest FreeType binaries or build yourself (under Windows you may use vcpkg with
vcpkg install freetype,vcpkg integrate install). - Add imgui_freetype.h/cpp alongside your project files.
- Add
#define IMGUI_ENABLE_FREETYPEin your imconfig.h file
About Gamma Correct Blending
FreeType assumes blending in linear space rather than gamma space. See FreeType note for FT_Render_Glyph. For correct results you need to be using sRGB and convert to linear space in the pixel shader output. The default Dear ImGui styles will be impacted by this change (alpha values will need tweaking).
Testbed for toying with settings (for developers)
See https://gist.github.com/ocornut/b3a9ecf13502fd818799a452969649ad
Known issues
- Oversampling settins are ignored but also not so much necessary with the higher quality rendering.
Comparaison
Small, thin anti-aliased fonts are typically benefiting a lots from Freetype's hinting:
