Attachment 6289 Details for Bug 7578 – Testcase for the "freezing computer" problem.

Testcase for the "freezing computer" problem.

cairotest.c (text/plain), 2.20 KB, created by Simon Budig on 2006-07-20 10:16:53 UTC

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Filename:

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Creator: Simon Budig

Created: 2006-07-20 10:16:53 UTC

Size: 2.20 KB

patch

obsolete

>#include <gtk/gtk.h>
>#include <cairo.h>
>#include <stdlib.h>
>
>/* compile with
> * gcc -Wall -g -o cairotest `pkg-config --libs --cflags cairo gtk+-2.0` cairotest.c
> */
>void
>draw (GtkWidget *darea)
>{
>  GtkAllocation *alloc;
>  gdouble        scaling;
>  cairo_t       *cr;
>  gdouble dx = 1.0, dy = 1.0;
>
>
>  cr = gdk_cairo_create (darea->window);
>
>  alloc = &darea->allocation;
>  scaling = MIN (alloc->width, alloc->height) / 2.2;
>  cairo_rectangle (cr, 3, 3, alloc->width - 6, alloc->height - 6);
>  cairo_clip (cr);
>
>  cairo_translate (cr, alloc->width / 2, alloc->height / 2);
>  cairo_scale (cr, scaling, -scaling);
>
>  cairo_device_to_user_distance (cr, &dx, &dy);
>  cairo_set_line_width (cr, MAX (dx, dy));
>  cairo_set_source_rgba (cr, 1.0, 0.0, 0.0, 1.0);
>
>  /* this goes across the origin in the center of the window */
>  cairo_move_to (cr, -47.0, -47.0);
>  cairo_line_to (cr, 47.0, 47.0);
>  cairo_stroke (cr);
>
>  /* this is a unit-box around the center of the window */
>  cairo_set_source_rgba (cr, 0.0, 0.0, 1.0, 1.0);
>  cairo_rectangle (cr, -1, -1, 2, 2);
>  cairo_stroke (cr);
>
>  cairo_destroy (cr);
>}
>
>
>gboolean
>expose_event (GtkWidget      *widget,
>              GdkEventExpose *event,
>              gpointer       *data)
>{
>  GtkWidget *darea = GTK_WIDGET (data);
>
>  draw (darea);
>
>  return FALSE;
>}
>
>
>void
>create_window (void)
>{
>  GtkWidget *window, *darea;
>
>  window = g_object_new (GTK_TYPE_WINDOW,
>                         "title", "Test",
>                         "default-width", 800,
>                         "default-height", 600,
>                         "visible", TRUE,
>                         NULL);
>
>  g_signal_connect (window,
>                    "destroy", G_CALLBACK (gtk_main_quit), NULL);
>
>  darea = g_object_new (GTK_TYPE_DRAWING_AREA,
>                        "width-request", 100,
>                        "height-request", 100,
>                        "visible", TRUE,
>                        "parent", window,
>                        NULL);
>  g_object_connect (G_OBJECT (darea),
>                    "signal::expose-event",
>                        G_CALLBACK (expose_event), darea,
>                    NULL);
>}
>
>
>gint
>main (gint argc, char *argv[])
>{
>  gtk_init (&argc, &argv);
>
>  create_window ();
>
>  gtk_main ();
>
>  return 0;
>}

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