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