1.将以下代码保存到screenshot.c中
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#include <gtk/gtk.h> GdkPixbuf *get_screenshot() { GdkPixbuf *screenshot; GdkWindow *root; gint x, y; gint width, height; root = gdk_get_default_root_window(); gdk_window_get_geometry(root, &x, &y, &width, &height); screenshot = gdk_pixbuf_get_from_window(root, x, y, width, height); return screenshot; } int main(int argc, char **argv) { GtkWidget *window; gtk_init(&argc, &argv); window = gtk_window_new(GTK_WINDOW_TOPLEVEL); gtk_window_set_default_size(GTK_WINDOW(window), 0, 0); gtk_window_set_title(GTK_WINDOW(window), ""); GdkPixbuf *screenshot = get_screenshot(); GError *error=NULL; if (screenshot != NULL) { g_print("Not NULL p=%p\n", screenshot); gdk_pixbuf_save(screenshot, "test.jpeg", "jpeg",\ &error, "quality", "100", NULL); } else { g_print("NULL pointer\n"); exit(1); } g_signal_connect(G_OBJECT(window), "destroy", \ G_CALLBACK(gtk_main_quit),NULL); gtk_widget_show_all(window); if (access("test.jpeg", F_OK) == 0) { printf("截图成功\n"); exit(0); } gtk_main(); return 0; } |
2.终端执行以下代码打开文件时可以让检查器不报错
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pkg-config --cflags gtk+-3.0 glib-2.0 | tr ' ' '\n' >.config_c |
3.编译
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gcc `pkg-config --cflags --libs gtk+-3.0 ` screeshot.c |
4.运行
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./a.out |