DekiEditor::Fonts Namespace Reference

Functions
void	RegisterTtf (ImFont *font, const char *ttfPath)
	Records a loaded font's TTF path so CssPx can work out its CSS-to-FreeType size ratio from the font's own metrics.
float	CssPx (ImFont *font, float cssPx)
	The ImGui+FreeType size whose em-square matches a CSS font-size.

Function Documentation

RegisterTtf()

void DekiEditor::Fonts::RegisterTtf	(	ImFont *	font,
		const char *	ttfPath )

Records a loaded font's TTF path so CssPx can work out its CSS-to-FreeType size ratio from the font's own metrics.

Call ONCE per font, right after ImFontAtlas::AddFontFromFileTTF returns.

CssPx()

float DekiEditor::Fonts::CssPx	(	ImFont *	font,
		float	cssPx )

The ImGui+FreeType size whose em-square matches a CSS font-size.

ImGui's FreeType wrapper uses FT_SIZE_REQUEST_TYPE_REAL_DIM, which takes pixel_size as the full glyph extent (ascender + |descender|), while CSS takes font-size as the em-square. The ratio differs per font (Inter ≈ 1.21, JetBrains Mono ≈ 1.32, Space Grotesk ≈ 1.26). For "13px CSS" of Inter, call CssPx(g_FontUI, 13.0f).

A fixed-width font moves to the nearest size whose character advance is a whole pixel (12.5 CSS px JetBrains Mono becomes 13.33, 8px per character), since FreeType rounds the advance and a fractional one spreads the letters apart.

Returns cssPx unchanged if the font was not registered.