GdkPixbuf* gdk_pixbuf_new(GdkColorspace colorspace, gboolean has_alpha, int bits_per_sample, int width, int height);
guchar* gdk_pixbuf_get_pixels(const GdkPixbuf* pixbuf);
int gdk_pixbuf_get_rowstride(const GdkPixbuf* pixbuf);
int gdk_pixbuf_get_width(const GdkPixbuf* pixbuf);
int gdk_pixbuf_get_height(const GdkPixbuf* pixbuf);