Programowanie w systemie UNIX/c grafika/cairo
Biblioteka Cairo [1]
Instalacja[edytuj]
Zależności[edytuj]
- pixman[2] (low-level software library for pixel manipulation)
- pkg-config
apt-get[edytuj]
sudo apt-get install libcairo2-dev
Przykłady[edytuj]
Pierwszy program[edytuj]
/*
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: [3]
gcc c.c $(pkg-config --cflags --libs cairo)