Attachment 3418 Details for Bug 4618 – Simple GTK+ crash test.

Simple GTK+ crash test.

main.c (text/plain), 1.66 KB, created by Richard Stellingwerff on 2005-09-28 01:34:34 UTC

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Filename:

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Creator: Richard Stellingwerff

Created: 2005-09-28 01:34:34 UTC

Size: 1.66 KB

patch

obsolete

>#include <gtk/gtk.h>
>
>static gboolean
>on_alpha_window_expose (GtkWidget      *widget,
>            GdkEventExpose *expose)
>{
>	cairo_pattern_t *pt;
>	cairo_t *cr = gdk_cairo_create (widget->window);
>
>	cairo_set_line_width (cr, 1);
>	cairo_rectangle (cr, 10.5, 10, 20, 20);
>
>	pt = cairo_pattern_create_linear (10, 10, 10, 20);
>	cairo_pattern_add_color_stop_rgb (pt, 0, 1, 0, 0);
>	cairo_pattern_add_color_stop_rgb (pt, 1, 0, 1, 0);
>	cairo_set_source (cr, pt);
>
>	cairo_fill (cr);
>
>	cairo_pattern_destroy (pt);
>	cairo_destroy (cr);
>
>	return FALSE;
>}
>
>static void
>on_alpha_screen_changed (GtkWidget *widget,
>             GdkScreen *old_screen,
>             GtkWidget *label)
>{                       
>  GdkScreen *screen = gtk_widget_get_screen (widget);
>  GdkColormap *colormap = gdk_screen_get_rgba_colormap (screen);
>      
>  if (!colormap)
>  {
>    colormap = gdk_screen_get_rgb_colormap (screen);
>    printf("screen does NOT support alpha\n");
>  }
>  else
>  {
>	printf("screen supports alpha!\n");
>  }
>
>  gtk_widget_set_colormap (widget, colormap);
>}
>
>
>int main(int argc, char **argv)
>{
>	GtkWidget *window;
>
>	gtk_init (&argc, &argv);
>
>	window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
>	gtk_window_set_position (GTK_WINDOW (window), GTK_WIN_POS_CENTER_ALWAYS);
>	gtk_widget_set_app_paintable (window, TRUE);
>	gtk_widget_set_size_request (window, 100, 100);
>
>	on_alpha_screen_changed (window, NULL, NULL);
>
>    g_signal_connect (window, "screen-changed",
>            G_CALLBACK (on_alpha_screen_changed), NULL);
>
>    g_signal_connect (window, "expose-event",
>            G_CALLBACK (on_alpha_window_expose), NULL);
>
>	if (!GTK_WIDGET_VISIBLE (window))
>		gtk_widget_show_all (window);
>
>	gtk_main ();
>
>	return 0;
>}

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