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#include <config.h>
#include <gtk/gtk.h>
#include <stdio.h>
#include <stdlib.h>
GdkInterpType interp_type = GDK_INTERP_BILINEAR;
int overall_alpha = 255;
GdkPixbuf *pixbuf;
GtkWidget *darea;
void
set_interp_type (GtkWidget *widget, gpointer data)
{
guint types[] = { GDK_INTERP_NEAREST,
GDK_INTERP_BILINEAR,
GDK_INTERP_TILES,
GDK_INTERP_HYPER };
interp_type = types[gtk_combo_box_get_active (GTK_COMBO_BOX (widget))];
gtk_widget_queue_draw (darea);
}
void
overall_changed_cb (GtkAdjustment *adjustment, gpointer data)
{
if (adjustment->value != overall_alpha)
{
overall_alpha = adjustment->value;
gtk_widget_queue_draw (darea);
}
}
gboolean
expose_cb (GtkWidget *widget, GdkEventExpose *event, gpointer data)
{
GdkPixbuf *dest;
gdk_window_set_back_pixmap (widget->window, NULL, FALSE);
dest = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, event->area.width, event->area.height);
gdk_pixbuf_composite_color (pixbuf, dest,
0, 0, event->area.width, event->area.height,
-event->area.x, -event->area.y,
(double) widget->allocation.width / gdk_pixbuf_get_width (pixbuf),
(double) widget->allocation.height / gdk_pixbuf_get_height (pixbuf),
interp_type, overall_alpha,
event->area.x, event->area.y, 16, 0xaaaaaa, 0x555555);
gdk_draw_pixbuf (widget->window, widget->style->fg_gc[GTK_STATE_NORMAL], dest,
0, 0, event->area.x, event->area.y,
event->area.width, event->area.height,
GDK_RGB_DITHER_NORMAL, event->area.x, event->area.y);
g_object_unref (dest);
return TRUE;
}
extern void pixbuf_init();
int
main(int argc, char **argv)
{
GtkWidget *window, *vbox;
GtkWidget *combo_box;
GtkWidget *alignment;
GtkWidget *hbox, *label, *hscale;
GtkAdjustment *adjustment;
GtkRequisition scratch_requisition;
const gchar *creator;
GError *error;
pixbuf_init ();
gtk_init (&argc, &argv);
if (argc != 2) {
fprintf (stderr, "Usage: testpixbuf-scale FILE\n");
exit (1);
}
error = NULL;
pixbuf = gdk_pixbuf_new_from_file (argv[1], &error);
if (!pixbuf) {
fprintf (stderr, "Cannot load image: %s\n",
error->message);
g_error_free (error);
exit(1);
}
creator = gdk_pixbuf_get_option (pixbuf, "tEXt::Software");
if (creator)
g_print ("%s was created by '%s'\n", argv[1], creator);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
g_signal_connect (window, "destroy",
G_CALLBACK (gtk_main_quit), NULL);
vbox = gtk_vbox_new (FALSE, 0);
gtk_container_add (GTK_CONTAINER (window), vbox);
combo_box = gtk_combo_box_new_text ();
gtk_combo_box_append_text (GTK_COMBO_BOX (combo_box), "NEAREST");
gtk_combo_box_append_text (GTK_COMBO_BOX (combo_box), "BILINEAR");
gtk_combo_box_append_text (GTK_COMBO_BOX (combo_box), "TILES");
gtk_combo_box_append_text (GTK_COMBO_BOX (combo_box), "HYPER");
gtk_combo_box_set_active (GTK_COMBO_BOX (combo_box), 1);
g_signal_connect (combo_box, "changed",
G_CALLBACK (set_interp_type),
NULL);
alignment = gtk_alignment_new (0.0, 0.0, 0.0, 0.5);
gtk_box_pack_start (GTK_BOX (vbox), alignment, FALSE, FALSE, 0);
hbox = gtk_hbox_new (FALSE, 4);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
label = gtk_label_new ("Overall Alpha:");
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
adjustment = GTK_ADJUSTMENT (gtk_adjustment_new (overall_alpha, 0, 255, 1, 10, 0));
g_signal_connect (adjustment, "value_changed",
G_CALLBACK (overall_changed_cb), NULL);
hscale = gtk_hscale_new (adjustment);
gtk_scale_set_digits (GTK_SCALE (hscale), 0);
gtk_box_pack_start (GTK_BOX (hbox), hscale, TRUE, TRUE, 0);
gtk_container_add (GTK_CONTAINER (alignment), combo_box);
gtk_widget_show_all (vbox);
/* Compute the size without the drawing area, so we know how big to make the default size */
gtk_widget_size_request (vbox, &scratch_requisition);
darea = gtk_drawing_area_new ();
gtk_box_pack_start (GTK_BOX (vbox), darea, TRUE, TRUE, 0);
g_signal_connect (darea, "expose_event",
G_CALLBACK (expose_cb), NULL);
gtk_window_set_default_size (GTK_WINDOW (window),
gdk_pixbuf_get_width (pixbuf),
scratch_requisition.height + gdk_pixbuf_get_height (pixbuf));
gtk_widget_show_all (window);
gtk_main ();
return 0;
}
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