gtk/demos/testpixbuf-drawable.c
2010-08-08 02:59:21 +02:00

119 lines
3.3 KiB
C

#include "config.h"
#undef GDK_DISABLE_DEPRECATED
#include <gtk/gtk.h>
int
close_app (GtkWidget *widget, gpointer data)
{
gtk_main_quit ();
return TRUE;
}
int
expose_cb (GtkWidget *drawing_area, GdkEventExpose *evt, gpointer data)
{
GdkPixbuf *pixbuf;
pixbuf = (GdkPixbuf *) g_object_get_data (G_OBJECT (drawing_area), "pixbuf");
if (gdk_pixbuf_get_has_alpha (pixbuf))
{
gdk_draw_rgb_32_image (drawing_area->window,
drawing_area->style->black_gc,
evt->area.x, evt->area.y,
evt->area.width,
evt->area.height,
GDK_RGB_DITHER_MAX,
gdk_pixbuf_get_pixels (pixbuf) +
(evt->area.y * gdk_pixbuf_get_rowstride (pixbuf)) +
(evt->area.x * gdk_pixbuf_get_n_channels (pixbuf)),
gdk_pixbuf_get_rowstride (pixbuf));
}
else
{
gdk_draw_rgb_image (drawing_area->window,
drawing_area->style->black_gc,
evt->area.x, evt->area.y,
evt->area.width,
evt->area.height,
GDK_RGB_DITHER_NORMAL,
gdk_pixbuf_get_pixels (pixbuf) +
(evt->area.y * gdk_pixbuf_get_rowstride (pixbuf)) +
(evt->area.x * gdk_pixbuf_get_n_channels (pixbuf)),
gdk_pixbuf_get_rowstride (pixbuf));
}
return FALSE;
}
int
configure_cb (GtkWidget *drawing_area, GdkEventConfigure *evt, gpointer data)
{
GdkPixbuf *pixbuf;
pixbuf = (GdkPixbuf *) g_object_get_data (G_OBJECT (drawing_area), "pixbuf");
g_print ("X:%d Y:%d\n", evt->width, evt->height);
if (evt->width != gdk_pixbuf_get_width (pixbuf) || evt->height != gdk_pixbuf_get_height (pixbuf))
{
GdkWindow *root;
GdkPixbuf *new_pixbuf;
root = gdk_get_default_root_window ();
new_pixbuf = gdk_pixbuf_get_from_drawable (NULL, root, NULL,
0, 0, 0, 0, evt->width, evt->height);
g_object_set_data (G_OBJECT (drawing_area), "pixbuf", new_pixbuf);
g_object_unref (pixbuf);
}
return FALSE;
}
extern void pixbuf_init (void);
int
main (int argc, char **argv)
{
GdkWindow *root;
GtkWidget *window;
GtkWidget *vbox;
GtkWidget *drawing_area;
GdkPixbuf *pixbuf;
pixbuf_init ();
gtk_init (&argc, &argv);
gdk_rgb_set_verbose (TRUE);
gtk_widget_set_default_colormap (gdk_rgb_get_colormap ());
root = gdk_get_default_root_window ();
pixbuf = gdk_pixbuf_get_from_drawable (NULL, root, NULL,
0, 0, 0, 0, 150, 160);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
g_signal_connect (window, "delete_event",
G_CALLBACK (close_app), NULL);
g_signal_connect (window, "destroy",
G_CALLBACK (close_app), NULL);
vbox = gtk_vbox_new (FALSE, 0);
gtk_container_add (GTK_CONTAINER (window), vbox);
drawing_area = gtk_drawing_area_new ();
gtk_widget_set_size_request (GTK_WIDGET (drawing_area),
gdk_pixbuf_get_width (pixbuf),
gdk_pixbuf_get_height (pixbuf));
g_signal_connect (drawing_area, "expose_event",
G_CALLBACK (expose_cb), NULL);
g_signal_connect (drawing_area, "configure_event",
G_CALLBACK (configure_cb), NULL);
g_object_set_data (G_OBJECT (drawing_area), "pixbuf", pixbuf);
gtk_box_pack_start (GTK_BOX (vbox), drawing_area, TRUE, TRUE, 0);
gtk_widget_show_all (window);
gtk_main ();
return 0;
}