2 #include "gdk-pixbuf.h"
6 GdkInterpType interp_type = GDK_INTERP_BILINEAR;
7 int overall_alpha = 255;
12 set_interp_type (GtkWidget *widget, gpointer data)
14 interp_type = GPOINTER_TO_UINT (data);
15 gtk_widget_queue_draw (darea);
19 overall_changed_cb (GtkAdjustment *adjustment, gpointer data)
21 if (adjustment->value != overall_alpha)
23 overall_alpha = adjustment->value;
24 gtk_widget_queue_draw (darea);
29 expose_cb (GtkWidget *widget, GdkEventExpose *event, gpointer data)
33 gdk_window_set_back_pixmap (widget->window, NULL, FALSE);
35 dest = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, event->area.width, event->area.height);
37 gdk_pixbuf_composite_color (pixbuf, dest,
38 0, 0, event->area.width, event->area.height,
39 -event->area.x, -event->area.y,
40 (double) widget->allocation.width / gdk_pixbuf_get_width (pixbuf),
41 (double) widget->allocation.height / gdk_pixbuf_get_height (pixbuf),
42 interp_type, overall_alpha,
43 event->area.x, event->area.y, 16, 0xaaaaaa, 0x555555);
45 gdk_pixbuf_render_to_drawable (dest, widget->window, widget->style->fg_gc[GTK_STATE_NORMAL],
46 0, 0, event->area.x, event->area.y,
47 event->area.width, event->area.height,
48 GDK_RGB_DITHER_NORMAL, event->area.x, event->area.y);
50 gdk_pixbuf_unref (dest);
56 main(int argc, char **argv)
58 GtkWidget *window, *vbox;
59 GtkWidget *menuitem, *optionmenu, *menu;
61 GtkWidget *hbox, *label, *hscale;
62 GtkAdjustment *adjustment;
63 GtkRequisition scratch_requisition;
65 gtk_init (&argc, &argv);
69 fprintf (stderr, "Usage: testpixbuf-scale FILE\n");
73 pixbuf = gdk_pixbuf_new_from_file (argv[1]);
75 fprintf (stderr, "Cannot load %s\n", argv[1]);
79 window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
80 gtk_signal_connect (GTK_OBJECT (window), "destroy",
81 GTK_SIGNAL_FUNC (gtk_main_quit), NULL);
83 vbox = gtk_vbox_new (FALSE, 0);
84 gtk_container_add (GTK_CONTAINER (window), vbox);
86 menu = gtk_menu_new ();
88 menuitem = gtk_menu_item_new_with_label ("NEAREST");
89 gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
90 GTK_SIGNAL_FUNC (set_interp_type),
91 GUINT_TO_POINTER (GDK_INTERP_NEAREST));
92 gtk_widget_show (menuitem);
93 gtk_container_add (GTK_CONTAINER (menu), menuitem);
95 menuitem = gtk_menu_item_new_with_label ("BILINEAR");
96 gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
97 GTK_SIGNAL_FUNC (set_interp_type),
98 GUINT_TO_POINTER (GDK_INTERP_BILINEAR));
99 gtk_widget_show (menuitem);
100 gtk_container_add (GTK_CONTAINER (menu), menuitem);
102 menuitem = gtk_menu_item_new_with_label ("TILES");
103 gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
104 GTK_SIGNAL_FUNC (set_interp_type),
105 GUINT_TO_POINTER (GDK_INTERP_TILES));
106 gtk_container_add (GTK_CONTAINER (menu), menuitem);
108 menuitem = gtk_menu_item_new_with_label ("HYPER");
109 gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
110 GTK_SIGNAL_FUNC (set_interp_type),
111 GUINT_TO_POINTER (GDK_INTERP_HYPER));
112 gtk_container_add (GTK_CONTAINER (menu), menuitem);
114 optionmenu = gtk_option_menu_new ();
115 gtk_option_menu_set_menu (GTK_OPTION_MENU (optionmenu), menu);
116 gtk_option_menu_set_history (GTK_OPTION_MENU (optionmenu), 1);
118 alignment = gtk_alignment_new (0.0, 0.0, 0.0, 0.5);
119 gtk_box_pack_start (GTK_BOX (vbox), alignment, FALSE, FALSE, 0);
121 hbox = gtk_hbox_new (FALSE, 4);
122 gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
124 label = gtk_label_new ("Overall Alpha:");
125 gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
127 adjustment = GTK_ADJUSTMENT (gtk_adjustment_new (overall_alpha, 0, 255, 1, 10, 0));
128 gtk_signal_connect (GTK_OBJECT (adjustment), "value_changed",
129 GTK_SIGNAL_FUNC (overall_changed_cb), NULL);
131 hscale = gtk_hscale_new (adjustment);
132 gtk_scale_set_digits (GTK_SCALE (hscale), 0);
133 gtk_box_pack_start (GTK_BOX (hbox), hscale, TRUE, TRUE, 0);
135 gtk_container_add (GTK_CONTAINER (alignment), optionmenu);
136 gtk_widget_show_all (vbox);
138 /* Compute the size without the drawing area, so we know how big to make the default size */
139 gtk_widget_size_request (vbox, &scratch_requisition);
141 darea = gtk_drawing_area_new ();
142 gtk_box_pack_start (GTK_BOX (vbox), darea, TRUE, TRUE, 0);
144 gtk_signal_connect (GTK_OBJECT (darea), "expose_event",
145 GTK_SIGNAL_FUNC (expose_cb), NULL);
147 gtk_window_set_default_size (GTK_WINDOW (window),
148 gdk_pixbuf_get_width (pixbuf),
149 scratch_requisition.height + gdk_pixbuf_get_height (pixbuf));
151 gtk_widget_show_all (window);