Font Stash

Font stash is light-weight online font texture atlas builder written in C. It uses stb_truetype to render fonts on demand to a texture atlas.

The code is split in two parts, the font atlas and glyph quad generator fontstash.h, and an example OpenGL backend (glstash.h.

Screenshot

Example

	// Create stash and rendering backend.
	struct fontstash* stash = fontstash_create(512, 512, 256, FONTSTASH_ZERO_TOPLEFT);
	struct glstash* gl = glstash_create(512, 512, 256);

	// Add font to stash.
	fontstash_add_font(stash, FONT_NORMAL, "fonts/DroidSerif-Regular.ttf");

	float dx = 10, dy = 10;
	unsigned int white = glrgba(255,255,255,255);
	unsigned int brown = glrgba(192,128,0,128);

	// Render some text
	struct fontstash_style styleBig = { FONT_NORMAL, 124.0f, white };
	fontstash_draw_text(stash, styleBig, dx,dy,"The big ", &dx);

	struct fontstash_style styleN24 = { FONT_NORMAL, 24.0f, brown };
	fontstash_draw_text(stash, styleN24, dx,dy,"brown fox", &dx);

	// Update texture and draw text as quads.
	glstash_draw(gl, stash);

Using Font Stash in your project

In order to use fontstash in your own project, just copy fontstash.h, stb_truetype.h, and potentially glstash.h to your project. In one C/C++ define FONTSTASH_IMPLEMENTATION before including the library to expand the font stash implementation in that file.

#include <stdio.h>					// malloc, free, fopen, fclose, ftell, fseek, fread
#include <string.h>					// memset
#define FONTSTASH_IMPLEMENTATION	// Expands implementation
#include "fontstash.h"

#include <GLFW/glfw3.h>				// Or any other GL header of your choice.
#define GLSTASH_IMPLEMENTATION		// Expands implementation
#include "glstash.h"

Compiling

The demo code requires GLFW to compile.

Links

Uses stb_truetype for font rendering.

aktau / fontstash