[gdk-pixbuf] Add tests for saving

[Matthias Clasen <matthiasc src gnome org>]

commit 8b93ff287dcbcf7862d40e4eebbf5fae594a07c2
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Dec 19 16:41:49 2013 -0500

    Add tests for saving

 tests/Makefile.am   |    2 +
 tests/pixbuf-save.c |  131 +++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 133 insertions(+), 0 deletions(-)
---
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 5b1de29..176cbff 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -28,6 +28,7 @@ noinst_PROGRAMS =                     \
        pixbuf-stream                   \
        pixbuf-resource                 \
        pixbuf-scale                    \
+       pixbuf-save                     \
        $(NULL)
 
 test_programs =                        \
@@ -39,6 +40,7 @@ test_programs =                       \
        pixbuf-stream                   \
        pixbuf-resource                 \
        pixbuf-scale                    \
+       pixbuf-save                     \
        $(NULL)
 
 dist_test_data =                       \
diff --git a/tests/pixbuf-save.c b/tests/pixbuf-save.c
new file mode 100644
index 0000000..227f98d
--- /dev/null
+++ b/tests/pixbuf-save.c
@@ -0,0 +1,131 @@
+/* -*- Mode: C; c-basic-offset: 2; -*- */
+/* GdkPixbuf library - test loaders
+ *
+ * Copyright (C) 2013 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Author: Matthias Clasen
+ */
+
+#include "gdk-pixbuf/gdk-pixbuf.h"
+#include <string.h>
+
+#define compare_option(p1, p2, key) \
+  g_strcmp0 (gdk_pixbuf_get_option (p1, key), gdk_pixbuf_get_option (p2, key))
+
+static gboolean
+pixdata_equal (GdkPixbuf *p1, GdkPixbuf *p2)
+{
+  if (gdk_pixbuf_get_colorspace (p1) != gdk_pixbuf_get_colorspace (p2))
+    return FALSE;
+  if (gdk_pixbuf_get_n_channels (p1) != gdk_pixbuf_get_n_channels (p2))
+    return FALSE;
+  if (gdk_pixbuf_get_bits_per_sample (p1) != gdk_pixbuf_get_bits_per_sample (p2))
+    return FALSE;
+  if (gdk_pixbuf_get_width (p1) != gdk_pixbuf_get_width (p2))
+    return FALSE;
+  if (gdk_pixbuf_get_height (p1) != gdk_pixbuf_get_height (p2))
+    return FALSE;
+  if (gdk_pixbuf_get_rowstride (p1) != gdk_pixbuf_get_rowstride (p2))
+    return FALSE;
+  if (memcmp (gdk_pixbuf_get_pixels (p1), gdk_pixbuf_get_pixels (p2),
+          gdk_pixbuf_get_byte_length (p1)) != 0)
+    return FALSE;
+
+  return TRUE;
+}
+
+static gboolean
+pixbuf_equal (GdkPixbuf *p1, GdkPixbuf *p2)
+{
+  if (!pixdata_equal (p1, p2))
+    return FALSE;
+  if (compare_option (p1, p2, "Title") != 0)
+    return FALSE;
+  if (compare_option (p1, p2, "Artist") != 0)
+    return FALSE;
+  if (compare_option (p1, p2, "x_hot") != 0)
+    return FALSE;
+  if (compare_option (p1, p2, "y_hot") != 0)
+    return FALSE;
+  if (compare_option (p1, p2, "orientation") != 0)
+    return FALSE;
+  if (compare_option (p1, p2, "icc-profile") != 0)
+    return FALSE;
+
+  return TRUE;
+}
+
+static void
+test_save_roundtrip (void)
+{
+  GError *error = NULL;
+  GdkPixbuf *ref;
+  GdkPixbuf *pixbuf;
+
+  ref = gdk_pixbuf_new_from_file (g_test_get_filename (G_TEST_DIST, "test-image.png", NULL), &error);
+  g_assert_no_error (error);
+
+  gdk_pixbuf_save (ref, "pixbuf-save-roundtrip", "png", &error, NULL);
+  g_assert_no_error (error);
+
+  pixbuf = gdk_pixbuf_new_from_file ("pixbuf-save-roundtrip", &error);
+  g_assert_no_error (error);
+
+  g_assert (pixbuf_equal (pixbuf, ref));
+
+  g_object_unref (pixbuf);
+  g_object_unref (ref);
+}
+
+static void
+test_save_options (void)
+{
+  GdkPixbuf *ref;
+  GdkPixbuf *pixbuf;
+  GError *error = NULL;
+
+  ref = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, 10, 10);
+  gdk_pixbuf_fill (ref, 0xff00ff00);
+
+  gdk_pixbuf_save (ref, "pixbuf-save-options", "png", &error,
+                   "tEXt::option1", "Some text to transport via option",
+                   "tEXt::long-option-name123456789123456789123456789", "",
+                   "tEXt::3", "αβγδ",
+                   NULL);
+  g_assert_no_error (error);
+
+  pixbuf = gdk_pixbuf_new_from_file ("pixbuf-save-options", &error);
+  g_assert_no_error (error);
+
+  g_assert_cmpstr (gdk_pixbuf_get_option (pixbuf, "tEXt::option1"), ==, "Some text to transport via option");
+  g_assert_cmpstr (gdk_pixbuf_get_option (pixbuf, "tEXt::long-option-name123456789123456789123456789"), ==, 
"");
+  g_assert_cmpstr (gdk_pixbuf_get_option (pixbuf, "tEXt::3"), ==, "αβγδ");
+
+  g_object_unref (pixbuf);
+  g_object_unref (ref);
+}
+
+int
+main (int argc, char **argv)
+{
+  g_test_init (&argc, &argv, NULL);
+
+  g_test_add_func ("/pixbuf/save/roundtrip", test_save_roundtrip);
+  g_test_add_func ("/pixbuf/save/options", test_save_options);
+
+  return g_test_run ();
+}