Add a test for my fixes from July 20th.

2008-07-22  Sven Herzberg  <sven@imendio.com>

	Add a test for my fixes from July 20th.

	* configure.in: create gdk/tests/Makefile
	* gdk/Makefile.am: include the tests subfolder
	* gdk/tests/Makefile.am: create and run my test
	* gdk/tests/check-gdk-cairo.c (test), (main): the test that I wrote
	(passes at least for x11 and quartz backends)


svn path=/trunk/; revision=20894

3 files changed, 161 insertions, 2 deletions

diff --git a/gdk/Makefile.am b/gdk/Makefile.am
index fb77f36ac..e319e3bd1 100644
--- a/gdk/Makefile.am
+++ b/gdk/Makefile.am
@@ -1,8 +1,8 @@
 ## Makefile.am for gtk+/gdk
 include $(top_srcdir)/Makefile.decl
 
-SUBDIRS = $(gdktarget)
-DIST_SUBDIRS = win32 x11 quartz directfb
+SUBDIRS = $(gdktarget) . tests
+DIST_SUBDIRS = win32 x11 quartz directfb tests
 
 EXTRA_DIST +=			\
 	keynames.txt		\
diff --git a/gdk/tests/Makefile.am b/gdk/tests/Makefile.am
new file mode 100644
index 000000000..1e4189ef2
--- /dev/null
+++ b/gdk/tests/Makefile.am
@@ -0,0 +1,20 @@
+include $(top_srcdir)/Makefile.decl
+
+NULL=
+
+check_PROGRAMS=check-gdk-cairo
+TESTS=$(check_PROGRAMS)
+
+AM_CPPFLAGS=\
+	$(GDK_DEP_CFLAGS) \
+	-I$(top_builddir)/gdk \
+	$(NULL)
+
+check_gdk_cairo_SOURCES=\
+	check-gdk-cairo.c \
+	$(NULL)
+check_gdk_cairo_LDADD=\
+	$(GDK_DEP_LIBS) \
+	$(top_builddir)/gdk-pixbuf/libgdk_pixbuf-$(GTK_API_VERSION).la \
+	$(top_builddir)/gdk/libgdk-$(gdktarget)-$(GTK_API_VERSION).la \
+	$(NULL)
diff --git a/gdk/tests/check-gdk-cairo.c b/gdk/tests/check-gdk-cairo.c
new file mode 100644
index 000000000..d1cb41b48
--- /dev/null
+++ b/gdk/tests/check-gdk-cairo.c
@@ -0,0 +1,139 @@
+/* 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;
+}
+