GTK编程：将图片文件按指定比例显示

https://blog.csdn.net/wonxxx/article/details/44788249

/* File: SizeShow.c * Date: Mon Mar 27 15:36:09 HKT 2015 * Describe: Show the picture with the specified size * Autor: won */
#include
#include //指定显示分辨率
#define dest_width 320
#define dest_height 240
void showPic(char *filename) { GtkWidget *window; GtkWidget *image;
    const GdkPixbuf *src_pixbuf; GdkPixbuf *dest_pixbuf;
    //创建一个新窗口
    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
     //读取图片参数
    src_pixbuf = gdk_pixbuf_new_from_file(filename, NULL);
     //将src_pixbuf设置成屏幕大小
    dest_pixbuf = gdk_pixbuf_scale_simple(src_pixbuf, dest_width, dest_height, GDK_INTERP_HYPER);
     //从dest_pixbuf中读取图片存于image中
    image = gtk_image_new_from_pixbuf(dest_pixbuf);
     //设置窗口大小
    gtk_window_set_default_size(GTK_WINDOW(window), dest_width, dest_height);
     //将图片image加入window容器中
    gtk_container_add(GTK_CONTAINER(window), image);
     //设置窗口边框宽度
    gtk_container_set_border_width(GTK_CONTAINER(window), 0);
    //显示窗口 gtk_widget_show_all(window); }

int main(int argc, char *argv[]) { gtk_init(&argc, &argv); showPic(argv[1]); gtk_main(); return 0; }