linux c图形库 曲线

#include <gtk/gtk.h>

static void draw_curve(GtkWidget *widget, cairo_t *cr, gpointer data) {
    // 设置画笔颜色
    cairo_set_source_rgb(cr, 0.0, 0.0, 1.0);

    // 开始路径
    cairo_move_to(cr, 50, 150);
    cairo_curve_to(cr, 100, 50, 150, 250, 200, 150);

    // 绘制路径
    cairo_stroke(cr);
}

int main(int argc, char *argv[]) {
    GtkWidget *window;
    GtkWidget *drawing_area;

    gtk_init(&argc, &argv);

    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title(GTK_WINDOW(window), "Bezier Curve Example");
    gtk_window_set_default_size(GTK_WINDOW(window), 400, 300);

    drawing_area = gtk_drawing_area_new();
    gtk_container_add(GTK_CONTAINER(window), drawing_area);

    g_signal_connect(G_OBJECT(drawing_area), "draw", G_CALLBACK(draw_curve), NULL);
    g_signal_connect(G_OBJECT(window), "destroy", G_CALLBACK(gtk_main_quit), NULL);

    gtk_widget_show_all(window);
    gtk_main();

    return 0;
}

gcc `pkg-config --cflags --libs gtk+-3.0` -o bezier_curve bezier_curve.c
./bezier_curve