An example of Cairo and FreeType in C

This is an example C program showing the use of the Cairo graphics library and the FreeType library together to load an arbitrary type and display some text.

#include <stdio.h>
#include <stdlib.h>
#include <cairo.h>
#include <cairo-ft.h>
#include <ft2build.h>
#include FT_SFNT_NAMES_H
#include FT_FREETYPE_H
#include FT_GLYPH_H
#include FT_OUTLINE_H
#include FT_BBOX_H
#include FT_TYPE1_TABLES_H

int main ()
{
    FT_Library value;
    FT_Error status;
    FT_Face face;

    cairo_t *c;
    cairo_surface_t *cs;
    cairo_font_face_t * ct;
    int size = 200;

    cs = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, size, size);
    c = cairo_create (cs);

    const char * filename =
	"/usr/local/share/fonts/Droid/DroidSansFallbackFull.ttf";

    status = FT_Init_FreeType (& value);
    if (status != 0) {
	fprintf (stderr, "Error %d opening library.\n", status);
	exit (EXIT_FAILURE);
    }
    status = FT_New_Face (value, filename, 0, & face);
    if (status != 0) {
	fprintf (stderr, "Error %d opening %s.\n", status, filename);
	exit (EXIT_FAILURE);
    }
    ct = cairo_ft_font_face_create_for_ft_face (face, 0);
    cairo_set_font_face (c, ct);
    cairo_set_font_size (c, size/3);
    cairo_set_source_rgb (c, 0, 0, 0);
    cairo_move_to (c, size/6, size/3);
    cairo_show_text (c, "あい");
    cairo_set_source_rgb (c, 0.5, 0.5, 0);
    cairo_move_to (c, size/6, 5*size/6);
    cairo_show_text (c, "金柑");
    cairo_surface_write_to_png (cs, "free-type.png");
    return 0;
}

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The output of the example looks like this:

Here is a Makefile, which relies on the use of pkg-config to access the Cairo and FreeType libraries:

C=free-type.c
CFLAGS = -Wall -g `pkg-config --cflags freetype2 cairo`
LDFLAGS = `pkg-config --libs freetype2 cairo`

all: free-type.png

free-type.png: free-type
        ./free-type

free-type: $(C)
        $(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(C)

clean:
        -rm -f free-type free-type.png

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