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

   1 #include <config.h>
   2 #include <gtk/gtk.h>
   3 #ifdef GDK_WINDOWING_X11
   4 #include <gdk/x11/gdkx.h>
   5 #elif defined (GDK_WINDOWING_WIN32)
   6 #include <gdk/win32/gdkwin32.h>
   7 #elif defined (GDK_WINDOWING_FB)
   8 #include <gdk/linux-fb/gdkfb.h>
   9 #endif
  10
  11 int close_app(GtkWidget *widget, gpointer data)
  12 {
  13    gtk_main_quit();
  14    return TRUE;
  15 }
  16
  17 int expose_cb(GtkWidget *drawing_area, GdkEventExpose *evt, gpointer data)
  18 {
  19    GdkPixbuf *pixbuf;
  20
  21    pixbuf = (GdkPixbuf *) gtk_object_get_data(GTK_OBJECT(drawing_area),
  22                                               "pixbuf");
  23    if(gdk_pixbuf_get_has_alpha (pixbuf))
  24    {
  25       gdk_draw_rgb_32_image(drawing_area->window,
  26                             drawing_area->style->black_gc,
  27                             evt->area.x, evt->area.y,
  28                             evt->area.width,
  29                             evt->area.height,
  30                             GDK_RGB_DITHER_MAX,
  31                             gdk_pixbuf_get_pixels (pixbuf) +
  32                             (evt->area.y * gdk_pixbuf_get_rowstride (pixbuf)) +
  33                             (evt->area.x * gdk_pixbuf_get_n_channels (pixbuf)),
  34                             gdk_pixbuf_get_rowstride (pixbuf));
  35    }
  36    else
  37    {
  38       gdk_draw_rgb_image(drawing_area->window,
  39                          drawing_area->style->black_gc,
  40                          evt->area.x, evt->area.y,
  41                          evt->area.width,
  42                          evt->area.height,
  43                          GDK_RGB_DITHER_NORMAL,
  44                          gdk_pixbuf_get_pixels (pixbuf) +
  45                          (evt->area.y * gdk_pixbuf_get_rowstride (pixbuf)) +
  46                          (evt->area.x * gdk_pixbuf_get_n_channels (pixbuf)),
  47                          gdk_pixbuf_get_rowstride (pixbuf));
  48    }
  49    return FALSE;
  50 }
  51
  52 int configure_cb(GtkWidget *drawing_area, GdkEventConfigure *evt, gpointer data)
  53 {
  54    GdkPixbuf *pixbuf;
  55
  56    pixbuf = (GdkPixbuf *) gtk_object_get_data(GTK_OBJECT(drawing_area),
  57                                               "pixbuf");
  58
  59    g_print("X:%d Y:%d\n", evt->width, evt->height);
  60    if(evt->width != gdk_pixbuf_get_width (pixbuf) || evt->height != gdk_pixbuf_get_height (pixbuf))
  61    {
  62       GdkWindow *root;
  63       GdkPixbuf *new_pixbuf;
  64
  65       root = GDK_ROOT_PARENT();
  66       new_pixbuf = gdk_pixbuf_get_from_drawable(NULL, root, NULL,
  67                                                 0, 0, 0, 0, evt->width, evt->height);
  68       gtk_object_set_data(GTK_OBJECT(drawing_area), "pixbuf", new_pixbuf);
  69       gdk_pixbuf_unref(pixbuf);
  70    }
  71
  72    return FALSE;
  73 }
  74
  75 extern void pixbuf_init();
  76
  77 int main(int argc, char **argv)
  78 {
  79    GdkWindow     *root;
  80    GtkWidget     *window;
  81    GtkWidget     *vbox;
  82    GtkWidget     *drawing_area;
  83    GdkPixbuf     *pixbuf;
  84
  85    pixbuf_init ();
  86
  87    gtk_init(&argc, &argv);
  88    gdk_rgb_set_verbose(TRUE);
  89
  90    gtk_widget_set_default_colormap(gdk_rgb_get_colormap());
  91
  92    root = GDK_ROOT_PARENT();
  93    pixbuf = gdk_pixbuf_get_from_drawable(NULL, root, NULL,
  94                                          0, 0, 0, 0, 150, 160);
  95
  96    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  97    gtk_signal_connect(GTK_OBJECT(window), "delete_event",
  98                       GTK_SIGNAL_FUNC(close_app), NULL);
  99    gtk_signal_connect(GTK_OBJECT(window), "destroy",
 100                       GTK_SIGNAL_FUNC(close_app), NULL);
 101
 102    vbox = gtk_vbox_new(FALSE, 0);
 103    gtk_container_add(GTK_CONTAINER(window), vbox);
 104
 105    drawing_area = gtk_drawing_area_new();
 106    gtk_widget_set_size_request (GTK_WIDGET(drawing_area),
 107                                 gdk_pixbuf_get_width (pixbuf),
 108                                 gdk_pixbuf_get_height (pixbuf));
 109    gtk_signal_connect(GTK_OBJECT(drawing_area), "expose_event",
 110                       GTK_SIGNAL_FUNC(expose_cb), NULL);
 111
 112    gtk_signal_connect(GTK_OBJECT(drawing_area), "configure_event",
 113                       GTK_SIGNAL_FUNC(configure_cb), NULL);
 114    gtk_object_set_data(GTK_OBJECT(drawing_area), "pixbuf", pixbuf);
 115    gtk_box_pack_start(GTK_BOX(vbox), drawing_area, TRUE, TRUE, 0);
 116
 117    gtk_widget_show_all(window);
 118    gtk_main();
 119    return 0;
 120 }