[PATCH] [test/text-path] Check equivalence of text_path(); fill() and show_text().

[Chris Wilson]

If indeed
    cairo_show_text (cr, "cairo");
and
    cairo_text_path (cr, "cairo");
    cairo_fill (cr);
generate identical output, then one should be able to use the text_path()
to completely clear the show_text() and vice versa.
---
 test/Makefile.am       |    2 +
 test/text-path-ref.png |  Bin 0 -> 133 bytes
 test/text-path.c       |   80 ++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 82 insertions(+), 0 deletions(-)
 create mode 100644 test/text-path-ref.png
 create mode 100644 test/text-path.c

diff --git a/test/Makefile.am b/test/Makefile.am
index e08f61c..ce5931c 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -106,6 +106,7 @@ text-antialias-gray		\
 text-antialias-none		\
 text-antialias-subpixel		\
 text-cache-crash		\
+text-path			\
 text-pattern			\
 text-rotate			\
 text-zero-len			\
@@ -401,6 +402,7 @@ REFERENCE_IMAGES = \
 	text-antialias-subpixel-ref.png	\
 	text-glyph-range-ref.png	\
 	text-glyph-range-rgb24-ref.png	\
+	text-path-ref.png	\
 	text-pattern-ref.png	\
 	text-pattern-rgb24-ref.png	\
 	text-pattern-svg-argb32-ref.png	\
diff --git a/test/text-path-ref.png b/test/text-path-ref.png
new file mode 100644
index 0000000000000000000000000000000000000000..0a2939d2f1409ed04f8498c0499b6b2308969d8f
GIT binary patch
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literal 0
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diff --git a/test/text-path.c b/test/text-path.c
new file mode 100644
index 0000000..8691a70
--- /dev/null
+++ b/test/text-path.c
@@ -0,0 +1,80 @@
+/*
+ * Copyright © 2007 Chris Wilson
+ *
+ * Permission to use, copy, modify, distribute, and sell this software
+ * and its documentation for any purpose is hereby granted without
+ * fee, provided that the above copyright notice appear in all copies
+ * and that both that copyright notice and this permission notice
+ * appear in supporting documentation, and that the name of
+ * Chris Wilson not be used in advertising or publicity pertaining to
+ * distribution of the software without specific, written prior
+ * permission. Chris Wilson makes no representations about the
+ * suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * CHRIS WILSON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL CHRIS WILSON BE LIABLE FOR ANY SPECIAL,
+ * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+ * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Author: Chris Wilson <chris at chris-wilson.co.uk>
+ */
+
+#include "cairo-test.h"
+
+#define IMAGE_WIDTH 64
+#define IMAGE_HEIGHT 64
+
+static cairo_test_draw_function_t draw;
+
+cairo_test_t test = {
+    "text-path",
+    "Text path\n"
+    "Comparing cairo_text_path(); cairo_fill(); with cairo_show_text()",
+    IMAGE_WIDTH, IMAGE_HEIGHT,
+    draw
+};
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    cairo_scale (cr, width, height);
+    cairo_set_source_rgb (cr, 0., 0., 1.);
+
+    cairo_select_font_face (cr,
+	                    "Bitstream Vera Sans",
+			    CAIRO_FONT_SLANT_NORMAL,
+			    CAIRO_FONT_WEIGHT_NORMAL);
+    cairo_set_font_size (cr, 0.4);
+
+    /* check that the text_path() overlays show_text() */
+    cairo_save (cr);
+    cairo_move_to (cr, 0.05, 0.4);
+    cairo_show_text (cr, "cairo");
+    cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
+    cairo_move_to (cr, 0.05, 0.4);
+    cairo_text_path (cr, "cairo");
+    cairo_fill (cr);
+    cairo_restore (cr);
+
+    /* and that the show_text() overlays the text_path() */
+    cairo_save (cr);
+    cairo_move_to (cr, 0.05, 0.9);
+    cairo_text_path (cr, "cairo");
+    cairo_fill (cr);
+    cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
+    cairo_move_to (cr, 0.05, 0.4);
+    cairo_show_text (cr, "cairo");
+    cairo_restore (cr);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+int
+main (void)
+{
+    return cairo_test (&test);
+}
-- 
1.5.2.5


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