Pileus Git - ~andy/gtk/blob - demos/testpixbuf-drawable.c

   1 #include <config.h>
   2 #include <gtk/gtk.h>
   3 #include <gdk/x11/gdkx.h>
   4
   5 int close_app(GtkWidget *widget, gpointer data)
   6 {
   7    gtk_main_quit();
   8    return TRUE;
   9 }
  10
  11 int expose_cb(GtkWidget *drawing_area, GdkEventExpose *evt, gpointer data)
  12 {
  13    GdkPixbuf *pixbuf;
  14
  15    pixbuf = (GdkPixbuf *) gtk_object_get_data(GTK_OBJECT(drawing_area),
  16                                               "pixbuf");
  17    if(gdk_pixbuf_get_has_alpha (pixbuf))
  18    {
  19       gdk_draw_rgb_32_image(drawing_area->window,
  20                             drawing_area->style->black_gc,
  21                             evt->area.x, evt->area.y,
  22                             evt->area.width,
  23                             evt->area.height,
  24                             GDK_RGB_DITHER_MAX,
  25                             gdk_pixbuf_get_pixels (pixbuf) +
  26                             (evt->area.y * gdk_pixbuf_get_rowstride (pixbuf)) +
  27                             (evt->area.x * gdk_pixbuf_get_n_channels (pixbuf)),
  28                             gdk_pixbuf_get_rowstride (pixbuf));
  29    }
  30    else
  31    {
  32       gdk_draw_rgb_image(drawing_area->window,
  33                          drawing_area->style->black_gc,
  34                          evt->area.x, evt->area.y,
  35                          evt->area.width,
  36                          evt->area.height,
  37                          GDK_RGB_DITHER_NORMAL,
  38                          gdk_pixbuf_get_pixels (pixbuf) +
  39                          (evt->area.y * gdk_pixbuf_get_rowstride (pixbuf)) +
  40                          (evt->area.x * gdk_pixbuf_get_n_channels (pixbuf)),
  41                          gdk_pixbuf_get_rowstride (pixbuf));
  42    }
  43    return FALSE;
  44 }
  45
  46 int configure_cb(GtkWidget *drawing_area, GdkEventConfigure *evt, gpointer data)
  47 {
  48    GdkPixbuf *pixbuf;
  49
  50    pixbuf = (GdkPixbuf *) gtk_object_get_data(GTK_OBJECT(drawing_area),
  51                                               "pixbuf");
  52
  53    g_print("X:%d Y:%d\n", evt->width, evt->height);
  54    if(evt->width != gdk_pixbuf_get_width (pixbuf) || evt->height != gdk_pixbuf_get_height (pixbuf))
  55    {
  56       GdkWindow *root;
  57       GdkPixbuf *new_pixbuf;
  58
  59       root = GDK_ROOT_PARENT();
  60       new_pixbuf = gdk_pixbuf_get_from_drawable(NULL, root, NULL,
  61                                                 0, 0, 0, 0, evt->width, evt->height);
  62       gtk_object_set_data(GTK_OBJECT(drawing_area), "pixbuf", new_pixbuf);
  63       gdk_pixbuf_unref(pixbuf);
  64    }
  65
  66    return FALSE;
  67 }
  68
  69 extern void pixbuf_init();
  70
  71 int main(int argc, char **argv)
  72 {
  73    GdkWindow     *root;
  74    GtkWidget     *window;
  75    GtkWidget     *vbox;
  76    GtkWidget     *drawing_area;
  77    GdkPixbuf     *pixbuf;
  78
  79    pixbuf_init ();
  80
  81    gtk_init(&argc, &argv);
  82    gdk_rgb_set_verbose(TRUE);
  83    gdk_rgb_init();
  84
  85    gtk_widget_set_default_colormap(gdk_rgb_get_cmap());
  86
  87    root = GDK_ROOT_PARENT();
  88    pixbuf = gdk_pixbuf_get_from_drawable(NULL, root, NULL,
  89                                          0, 0, 0, 0, 150, 160);
  90
  91    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  92    gtk_signal_connect(GTK_OBJECT(window), "delete_event",
  93                       GTK_SIGNAL_FUNC(close_app), NULL);
  94    gtk_signal_connect(GTK_OBJECT(window), "destroy",
  95                       GTK_SIGNAL_FUNC(close_app), NULL);
  96
  97    vbox = gtk_vbox_new(FALSE, 0);
  98    gtk_container_add(GTK_CONTAINER(window), vbox);
  99
 100    drawing_area = gtk_drawing_area_new();
 101    gtk_drawing_area_size(GTK_DRAWING_AREA(drawing_area),
 102                          gdk_pixbuf_get_width (pixbuf),
 103                          gdk_pixbuf_get_height (pixbuf));
 104    gtk_signal_connect(GTK_OBJECT(drawing_area), "expose_event",
 105                       GTK_SIGNAL_FUNC(expose_cb), NULL);
 106
 107    gtk_signal_connect(GTK_OBJECT(drawing_area), "configure_event",
 108                       GTK_SIGNAL_FUNC(configure_cb), NULL);
 109    gtk_object_set_data(GTK_OBJECT(drawing_area), "pixbuf", pixbuf);
 110    gtk_box_pack_start(GTK_BOX(vbox), drawing_area, TRUE, TRUE, 0);
 111
 112    gtk_widget_show_all(window);
 113    gtk_main();
 114    return 0;
 115 }