5 GdkInterpType interp_type = GDK_INTERP_BILINEAR;
6 int overall_alpha = 255;
11 set_interp_type (GtkWidget *widget, gpointer data)
13 interp_type = GPOINTER_TO_UINT (data);
14 gtk_widget_queue_draw (darea);
18 overall_changed_cb (GtkAdjustment *adjustment, gpointer data)
20 if (adjustment->value != overall_alpha)
22 overall_alpha = adjustment->value;
23 gtk_widget_queue_draw (darea);
28 expose_cb (GtkWidget *widget, GdkEventExpose *event, gpointer data)
32 gdk_window_set_back_pixmap (widget->window, NULL, FALSE);
34 dest = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, event->area.width, event->area.height);
36 gdk_pixbuf_composite_color (pixbuf, dest,
37 0, 0, event->area.width, event->area.height,
38 -event->area.x, -event->area.y,
39 (double) widget->allocation.width / gdk_pixbuf_get_width (pixbuf),
40 (double) widget->allocation.height / gdk_pixbuf_get_height (pixbuf),
41 interp_type, overall_alpha,
42 event->area.x, event->area.y, 16, 0xaaaaaa, 0x555555);
44 gdk_pixbuf_render_to_drawable (dest, widget->window, widget->style->fg_gc[GTK_STATE_NORMAL],
45 0, 0, event->area.x, event->area.y,
46 event->area.width, event->area.height,
47 GDK_RGB_DITHER_NORMAL, event->area.x, event->area.y);
49 gdk_pixbuf_unref (dest);
54 extern void pixbuf_init();
57 main(int argc, char **argv)
59 GtkWidget *window, *vbox;
60 GtkWidget *menuitem, *optionmenu, *menu;
62 GtkWidget *hbox, *label, *hscale;
63 GtkAdjustment *adjustment;
64 GtkRequisition scratch_requisition;
68 gtk_init (&argc, &argv);
72 fprintf (stderr, "Usage: testpixbuf-scale FILE\n");
76 pixbuf = gdk_pixbuf_new_from_file (argv[1]);
78 fprintf (stderr, "Cannot load %s\n", argv[1]);
82 window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
83 gtk_signal_connect (GTK_OBJECT (window), "destroy",
84 GTK_SIGNAL_FUNC (gtk_main_quit), NULL);
86 vbox = gtk_vbox_new (FALSE, 0);
87 gtk_container_add (GTK_CONTAINER (window), vbox);
89 menu = gtk_menu_new ();
91 menuitem = gtk_menu_item_new_with_label ("NEAREST");
92 gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
93 GTK_SIGNAL_FUNC (set_interp_type),
94 GUINT_TO_POINTER (GDK_INTERP_NEAREST));
95 gtk_widget_show (menuitem);
96 gtk_container_add (GTK_CONTAINER (menu), menuitem);
98 menuitem = gtk_menu_item_new_with_label ("BILINEAR");
99 gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
100 GTK_SIGNAL_FUNC (set_interp_type),
101 GUINT_TO_POINTER (GDK_INTERP_BILINEAR));
102 gtk_widget_show (menuitem);
103 gtk_container_add (GTK_CONTAINER (menu), menuitem);
105 menuitem = gtk_menu_item_new_with_label ("TILES");
106 gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
107 GTK_SIGNAL_FUNC (set_interp_type),
108 GUINT_TO_POINTER (GDK_INTERP_TILES));
109 gtk_container_add (GTK_CONTAINER (menu), menuitem);
111 menuitem = gtk_menu_item_new_with_label ("HYPER");
112 gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
113 GTK_SIGNAL_FUNC (set_interp_type),
114 GUINT_TO_POINTER (GDK_INTERP_HYPER));
115 gtk_container_add (GTK_CONTAINER (menu), menuitem);
117 optionmenu = gtk_option_menu_new ();
118 gtk_option_menu_set_menu (GTK_OPTION_MENU (optionmenu), menu);
119 gtk_option_menu_set_history (GTK_OPTION_MENU (optionmenu), 1);
121 alignment = gtk_alignment_new (0.0, 0.0, 0.0, 0.5);
122 gtk_box_pack_start (GTK_BOX (vbox), alignment, FALSE, FALSE, 0);
124 hbox = gtk_hbox_new (FALSE, 4);
125 gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
127 label = gtk_label_new ("Overall Alpha:");
128 gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
130 adjustment = GTK_ADJUSTMENT (gtk_adjustment_new (overall_alpha, 0, 255, 1, 10, 0));
131 gtk_signal_connect (GTK_OBJECT (adjustment), "value_changed",
132 GTK_SIGNAL_FUNC (overall_changed_cb), NULL);
134 hscale = gtk_hscale_new (adjustment);
135 gtk_scale_set_digits (GTK_SCALE (hscale), 0);
136 gtk_box_pack_start (GTK_BOX (hbox), hscale, TRUE, TRUE, 0);
138 gtk_container_add (GTK_CONTAINER (alignment), optionmenu);
139 gtk_widget_show_all (vbox);
141 /* Compute the size without the drawing area, so we know how big to make the default size */
142 gtk_widget_size_request (vbox, &scratch_requisition);
144 darea = gtk_drawing_area_new ();
145 gtk_box_pack_start (GTK_BOX (vbox), darea, TRUE, TRUE, 0);
147 gtk_signal_connect (GTK_OBJECT (darea), "expose_event",
148 GTK_SIGNAL_FUNC (expose_cb), NULL);
150 gtk_window_set_default_size (GTK_WINDOW (window),
151 gdk_pixbuf_get_width (pixbuf),
152 scratch_requisition.height + gdk_pixbuf_get_height (pixbuf));
154 gtk_widget_show_all (window);