Previously, `height` was derived from a manually chosen glyph (typically
"I", Standard Cap Height) using FontBuilder, and `lineSpacing` was used
inconsistently for layout logic as a height.
Now, with the FreeType-based system:
- `height` uses `face->size->metrics.height`, which includes the
recommended line height with internal leading/line gap as defined by
the font designer.
- `lineSpacing` was removed
- `GetCapHeight` uses the standard cap height + ascender to have a
visual virtual alignment
This change standardizes font metric usage:
- Use `height` for vertical layout and line progression.
- Use `GetCapheight` in layout engines like `CGUIText` or `CGUIString`,
This ensures better alignment across fonts and consistent spacing in
multiline text rendering.
Fixes: #7962
The FreeType font loader was directly passing filesystem-style paths
(e.g., mod.zip/...) to FT_New_Face, which does not support paths inside
ZIP archives. As a result, FreeType failed to open the font, triggering
a crash when the engine attempted to use an invalid face object.
This patch changes the font loading logic to:
Use the VFS to read the .ttf font file into memory (shared_ptr<u8> and
size).
Load the font using FT_New_Memory_Face with the in-memory buffer,
ensuring compatibility with zipped mods.
This commit enhances text rendering by leveraging FreeType and a dynamic
font atlas. Previously, GUI scaling relied on bitmap fonts, which led to
blurry and distorted text when scaling up. Now, we scale the font size
directly using FreeType, resulting in much sharper and more readable
text at any GUI scale.
Key improvements:
- Replaced bitmap font scaling with true font size scaling via FreeType.
- Reduced glyph cache dependency on fixed positions, relying on shader
scaling instead.
- Switched to float-based glyph positioning for more accurate rendering
and scaling.
These changes ensure clean and consistent text appearance across
different GUI scales.
FreeType’s FT_Glyph_To_Bitmap mutates the FT_Glyph by allocating a new
glyph object and overwriting the input pointer. This creates a risk of
memory leaks if the old glyph isn’t released or if ownership is unclear.
To avoid this, we now store the glyph in a UniqueFTGlyph and explicitly
pass it by reference to FT_Glyph_To_Bitmap. After the mutation,
ownership continues to reside in the smart pointer, and cleanup is
guaranteed even in error branches.
For temporary glyphs (e.g., strokes), we still manually call
FT_Done_Glyph, since they are not managed by UniqueFTGlyph. These
changes ensure all glyph memory is correctly released and reduce the
need for repetitive error-path cleanup code.
Replace premade bitmap fonts with FreeType2 and dynamic texture atlas.
Switched from static, premade bitmap fonts to runtime-generated glyphs using FreeType2.
Glyphs are rendered on demand into a dynamic texture atlas, improving scalability,
font quality, and support for internationalization.
Currently using RGBA format for compatibility across all render
paths while initial support for R8_UNORM is being added.
This prepares for future optimizations in VRAM and performance
Includes groundwork for gamma-corrected blending and future swizzling support.
Avoid cases of filenames
Update years in terms and other legal(ish) documents
Don't update years in license headers, since change is not meaningful
Will add linter rule in seperate commit
Happy recompiling everyone!
Original Patch By: Nescio
Comment By: Gallaecio
Differential Revision: D2620
This was SVN commit r27786.
Replace unifont with CFont and CFontManager, since the h_mgr interface
was
needlessly inconvenient.
Load the font textures through CTextureManager, to support dynamic
reloading (e.g. when resetting GL state - see #741).
Add CFontMetrics as a convenient wrapper for code that just wants to
measure text.
Fixes#1117.
This was SVN commit r14016.
