--- /dev/null
+/* This file is part of GTK+
+ *
+ * AUTHORS
+ * Sven Herzberg
+ *
+ * Copyright (C) 2008 Sven Herzberg
+ *
+ * This work is provided "as is"; redistribution and modification
+ * in whole or in part, in any medium, physical or electronic is
+ * permitted without restriction.
+ *
+ * This work is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * In no event shall the authors or contributors be liable for any
+ * direct, indirect, incidental, special, exemplary, or consequential
+ * damages (including, but not limited to, procurement of substitute
+ * goods or services; loss of use, data, or profits; or business
+ * interruption) however caused and on any theory of liability, whether
+ * in contract, strict liability, or tort (including negligence or
+ * otherwise) arising in any way out of the use of this software, even
+ * if advised of the possibility of such damage.
+ */
+
+#include <gdk/gdk.h>
+#ifndef CAIRO_HAS_QUARTZ_SURFACE
+#include <cairo-quartz.h>
+#endif
+
+static void
+test (cairo_t* cr)
+{
+ cairo_save (cr);
+ cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
+ cairo_paint (cr);
+ cairo_restore (cr);
+
+ cairo_move_to (cr, 10.0, 20.0);
+ cairo_line_to (cr, 10.0, 30.0);
+ cairo_stroke (cr);
+
+ cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.5);
+ cairo_arc (cr, 0.0, 0.0, 10.0, 0.0, G_PI/2);
+ cairo_stroke (cr);
+}
+
+int
+main (int argc,
+ char**argv)
+{
+ GdkPixmap* pixmap;
+ GdkPixbuf* pixbuf;
+ GdkPixbuf* pbuf_platform;
+ GdkPixbuf* pbuf_imagesrf;
+ GError * error = NULL;
+ cairo_surface_t* surface;
+ cairo_t* cr;
+ guchar* data_platform;
+ guchar* data_imagesrf;
+ guint i;
+
+ gdk_init (&argc, &argv);
+
+ /* create "platform.png" via GdkPixmap */
+ pixmap = gdk_pixmap_new (NULL /* drawable */, 100 /* w */, 80 /* h */, 24 /* d */);
+ cr = gdk_cairo_create (pixmap);
+ test (cr);
+ cairo_destroy (cr);
+
+ pixbuf = gdk_pixbuf_get_from_drawable (NULL,
+ pixmap,
+ gdk_rgb_get_colormap (),
+ 0, 0,
+ 0, 0,
+ 100, 80);
+ if (!gdk_pixbuf_save (pixbuf, "gdksurface.png", "png", NULL, NULL)) {
+ g_error ("Eeek! Couldn't save the file \"gdksurface.png\"");
+ }
+ g_object_unref (pixbuf);
+
+ g_object_unref (pixmap);
+
+ /* create "cairosurface.png" via pure cairo */
+#ifndef CAIRO_HAS_QUARTZ_SURFACE
+ surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, 100, 80);
+#else
+ surface = cairo_quartz_surface_create (CAIRO_FORMAT_RGB24, 100, 80);
+#endif
+ cr = cairo_create (surface);
+ test (cr);
+ cairo_destroy (cr);
+ if (CAIRO_STATUS_SUCCESS != cairo_surface_write_to_png (surface, "cairosurface.png")) {
+ g_error ("Eeek! Couldn't save the file \"cairosurface.png\"");
+ }
+ cairo_surface_destroy (surface);
+
+ /* compare the images */
+ pbuf_platform = gdk_pixbuf_new_from_file ("gdksurface.png", &error);
+ if (!pbuf_platform || error) {
+ g_error ("Eeek! Error loading \"gdksurface.png\"");
+ }
+ pbuf_imagesrf = gdk_pixbuf_new_from_file ("cairosurface.png", &error);
+ if (!pbuf_imagesrf || error) {
+ g_object_unref (pbuf_platform);
+ g_error ("Eeek! Error loading \"cairosurface.png\"");
+ }
+
+ g_return_val_if_fail (gdk_pixbuf_get_width (pbuf_platform) ==
+ gdk_pixbuf_get_width (pbuf_imagesrf),
+ 1);
+ g_return_val_if_fail (gdk_pixbuf_get_height (pbuf_platform) ==
+ gdk_pixbuf_get_height (pbuf_imagesrf),
+ 1);
+ g_return_val_if_fail (gdk_pixbuf_get_rowstride (pbuf_platform) ==
+ gdk_pixbuf_get_rowstride (pbuf_imagesrf),
+ 1);
+ g_return_val_if_fail (gdk_pixbuf_get_n_channels (pbuf_platform) ==
+ gdk_pixbuf_get_n_channels (pbuf_imagesrf),
+ 1);
+
+ data_platform = gdk_pixbuf_get_pixels (pbuf_platform);
+ data_imagesrf = gdk_pixbuf_get_pixels (pbuf_imagesrf);
+
+ for (i = 0; i < gdk_pixbuf_get_height (pbuf_platform) * gdk_pixbuf_get_rowstride (pbuf_platform); i++) {
+ if (data_platform[i] != data_imagesrf[i]) {
+ g_warning ("Eeek! Images are differing at byte %d", i);
+ g_object_unref (pbuf_platform);
+ g_object_unref (pbuf_imagesrf);
+ return 1;
+ }
+ }
+
+ g_object_unref (pbuf_platform);
+ g_object_unref (pbuf_imagesrf);
+
+ return 0;
+}
+
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