gtk/demos/testpixbuf-scale.c
Owen Taylor 6cb79658c2 Export _gdk_draw_pixbuf as gdk_draw_pixbuf(), rename the _draw_pixbuf
Wed Oct  2 17:46:53 2002  Owen Taylor  <otaylor@redhat.com>

        * gdk/gdkdrawable.h gdk/gdkinternals.h gdk/gdkdraw.c
        gdk/gdkwindow.c gdk/gdkdrawable.c: Export _gdk_draw_pixbuf
        as gdk_draw_pixbuf(), rename the _draw_pixbuf virtual
        function to draw_pixbuf. (#60582)

        * gdk/gdkpixbuf-render.c (gdk_pixbuf_render_to_drawable[_alpha]):
        Note that these functions are obsolete in the docs.

        * gdk/gdkpixbuf-render.c (gdk_pixbuf_render_to_drawable):
        Remove all the sanity checks now we make it clear
        that it is obsolete name for gdk_draw_pixbuf().

        * gdk/gdkpixmap.c gtk/gtkcellrendererpixbuf.c gtk/gtkimage.c
          gtk/gtkpixmap.c demos/testpixbuf-scale.c demos/testpixbuf.c
          tests/testrgb.c: Use gdk_draw_pixbuf() everywhere.

        * gtk/gtklabel.c (gtk_label_set_mnemonic_widget): Fix
        some warnings.

        * gdk/gdkinternals.h (struct _GdkEventPrivate): Fix missed
        bit from last gdk_event_get_screen() change.

        * gdk/gdkevents.c: Couple of small fixes.i
2002-10-02 22:30:37 +00:00

169 lines
4.8 KiB
C

#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)
{
interp_type = GPOINTER_TO_UINT (data);
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 *menuitem, *optionmenu, *menu;
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);
menu = gtk_menu_new ();
menuitem = gtk_menu_item_new_with_label ("NEAREST");
g_signal_connect (menuitem, "activate",
G_CALLBACK (set_interp_type),
GUINT_TO_POINTER (GDK_INTERP_NEAREST));
gtk_widget_show (menuitem);
gtk_container_add (GTK_CONTAINER (menu), menuitem);
menuitem = gtk_menu_item_new_with_label ("BILINEAR");
g_signal_connect (menuitem, "activate",
G_CALLBACK (set_interp_type),
GUINT_TO_POINTER (GDK_INTERP_BILINEAR));
gtk_widget_show (menuitem);
gtk_container_add (GTK_CONTAINER (menu), menuitem);
menuitem = gtk_menu_item_new_with_label ("TILES");
g_signal_connect (menuitem, "activate",
G_CALLBACK (set_interp_type),
GUINT_TO_POINTER (GDK_INTERP_TILES));
gtk_container_add (GTK_CONTAINER (menu), menuitem);
menuitem = gtk_menu_item_new_with_label ("HYPER");
g_signal_connect (menuitem, "activate",
G_CALLBACK (set_interp_type),
GUINT_TO_POINTER (GDK_INTERP_HYPER));
gtk_container_add (GTK_CONTAINER (menu), menuitem);
optionmenu = gtk_option_menu_new ();
gtk_option_menu_set_menu (GTK_OPTION_MENU (optionmenu), menu);
gtk_option_menu_set_history (GTK_OPTION_MENU (optionmenu), 1);
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), optionmenu);
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;
}