int w, h;
cairo_surface_t *image;
cairo_pattern_t *pattern;
cairo_matrix_t matrix;
image = cairo_image_surface_create_from_png ("data/romedalen.png");
w = cairo_image_surface_get_width (image);
h = cairo_image_surface_get_height (image);
pattern = cairo_pattern_create_for_surface (image);
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
cairo_translate (cr, 128.0, 128.0);
cairo_rotate (cr, M_PI / 4);
cairo_scale (cr, 1 / sqrt (2), 1 / sqrt (2));
cairo_translate (cr, -128.0, -128.0);
cairo_matrix_init_scale (&matrix, w/256.0 * 5.0, h/256.0 * 5.0);
cairo_pattern_set_matrix (pattern, &matrix);
cairo_set_source (cr, pattern);
cairo_rectangle (cr, 0, 0, 256.0, 256.0);
cairo_fill (cr);
cairo_pattern_destroy (pattern);
cairo_surface_destroy (image);
