Programowanie w systemie UNIX/c grafika/cairo

Biblioteka Cairo

Instalacja

Zależności

• pixman (low-level software library for pixel manipulation)
• pkg-config

apt-get

 sudo apt-get install libcairo2-dev

Przykłady

Pierwszy program

/*
https://www.cairographics.org/FAQ/
the first example 
it will create a PNG image.
 
gcc c.c $(pkg-config --cflags --libs cairo)
./a.out

*/
#include <cairo.h>

int
main (int argc, char *argv[])
{
        cairo_surface_t *surface =
            cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 240, 80);
        cairo_t *cr =
            cairo_create (surface);

        cairo_select_font_face (cr, "serif", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_BOLD);
        cairo_set_font_size (cr, 32.0);
        cairo_set_source_rgb (cr, 0.0, 0.0, 1.0);
        cairo_move_to (cr, 10.0, 50.0);
        cairo_show_text (cr, "Hello, world");

        cairo_destroy (cr);
        cairo_surface_write_to_png (surface, "hello.png");
        cairo_surface_destroy (surface);
        return 0;
}

kompilujemy:

 gcc c.c $(pkg-config --cflags --libs cairo)

Programy korzystające z biblioteki

• mandelbrot-graphics

Pomoc

• stackoverflow questions tagged cairo
• Cairo graphics tutorial by Jan Bodnar
• cairographics examples