Re: GDK-PixBuf

[Andrej Prsa <andrej prsa guest arnes si>]

Thank you very much, everybody!

> In GTK 2, you could just do:
>  image = gtk_image_new_from_file ("test.jpg");
>  gtk_container_add (GTK_CONTAINER (window), image);
> 
> So look forward to that. ;-)
> 

I am looking forward to that! In the meantime, since there's been a lot of questions on a working example for Gtk1.2, I'm posting my solution, hoping someone too will find it useful!

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "gtk/gtk.h"
#include "gdk-pixbuf/gdk-pixbuf.h"

GdkPixmap *picture;

static gint expose_event (GtkWidget *widget, GdkEventExpose *event)
{
gdk_draw_pixmap (widget->window, widget->style->fg_gc[GTK_WIDGET_STATE (widget)], picture, event->area.x, event->area.y, event->area.x, event->area.y, event->area.width, event->area.height);

return FALSE;
}

int main (int argc, char *argv[])
{
GtkWidget *window;
GtkWidget *vbox;
GdkPixbuf *image;
GdkGC *setup;

GtkWidget *drawing_area;

gtk_init (&argc, &argv);

printf ("\n");
if (gdk_init_check (&argc, &argv) == 1) printf ("Connection to X Server Successful\n");
if (gdk_init_check (&argc, &argv) == 0) printf ("Connection to X Server Failed\n");

printf ("Display:   %s\n", gdk_get_display () );
printf ("ScrWidth:  %d\n", gdk_screen_width () );
printf ("ScrHeight: %d\n", gdk_screen_height () );

gtk_widget_push_visual (gdk_rgb_get_visual ());
gtk_widget_push_colormap (gdk_rgb_get_cmap());
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_signal_connect (GTK_OBJECT (window), "destroy", GTK_SIGNAL_FUNC (gtk_main_quit), "WM destroy");
gtk_widget_set_usize (window, 512, 512);
gtk_widget_pop_visual ();
gtk_widget_pop_colormap ();

vbox = gtk_vbox_new (FALSE, 0);
gtk_container_add (GTK_CONTAINER (window), vbox);

drawing_area = gtk_drawing_area_new ();
gtk_drawing_area_size (GTK_DRAWING_AREA (drawing_area), 512, 512);
gtk_box_pack_start (GTK_BOX (vbox), drawing_area, TRUE, TRUE, 0);
gtk_signal_connect (GTK_OBJECT (drawing_area), "expose_event",
		      (GtkSignalFunc) expose_event, NULL);

image = gdk_pixbuf_new_from_file ("test.gif");
picture = gdk_pixmap_new (NULL, 512, 512, gtk_widget_get_visual (drawing_area)->depth);
setup = gdk_gc_new (picture);

printf ("Visual:    %d\n", gtk_widget_get_visual (drawing_area)->depth);
printf ("Channels:  %d\n", gdk_pixbuf_get_n_channels (image));
printf ("Width:     %d\n", gdk_pixbuf_get_width  (image));
printf ("Height:    %d\n", gdk_pixbuf_get_height (image));
printf ("Alpha:     %d\n", gdk_pixbuf_get_has_alpha (image));
printf ("Bits:      %d\n", gdk_pixbuf_get_bits_per_sample (image));
printf ("Rowstride: %d\n", gdk_pixbuf_get_rowstride (image));
printf ("\n");

gdk_pixbuf_render_to_drawable (image, picture, setup, 0, 0, 0, 0, 512, 512, GDK_RGB_DITHER_NONE, 0, 0);
gdk_draw_pixmap ((GdkDrawable *)drawing_area, setup, picture, 0, 0, 0, 0, 512, 512);

gtk_widget_show_all (window);

gtk_main();

return (0);
}

Thanks again!

Andrej