[cairo-commit] test/bug-seams.c test/bug-seams.ref.png test/bug-seams.xlib-fallback.ref.png test/bug-seams.xlib.ref.png test/Makefile.am test/Makefile.sources
Chris Wilson
ickle at kemper.freedesktop.org
Thu Jun 24 02:13:39 PDT 2010
test/Makefile.am | 3 +
test/Makefile.sources | 1
test/bug-seams.c | 98 +++++++++++++++++++++++++++++++++++
test/bug-seams.ref.png |binary
test/bug-seams.xlib-fallback.ref.png |binary
test/bug-seams.xlib.ref.png |binary
6 files changed, 102 insertions(+)
New commits:
commit 5c7e1dd690af21943435676bfac320cfe863cf55
Author: Soeren Sandmann <sandmann at daimi.au.dk>
Date: Thu Jun 24 10:11:48 2010 +0100
test: Add an example of seams.
A pair of perfectly conjoint quads should not produce a seam when
accumulating into a temporary mask. Yet here is an example of where they
do!
diff --git a/test/Makefile.am b/test/Makefile.am
index 7b4bf8a..690a024 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -166,6 +166,9 @@ REFERENCE_IMAGES = \
bug-bo-rectangular.ref.png \
bug-bo-rectangular.image16.ref.png \
bug-bo-rectangular.ps.xfail.png \
+ bug-seams.ref.png \
+ bug-seams.xlib.ref.png \
+ bug-seams.xlib-fallback.ref.png \
bilevel-image.ref.png \
bitmap-font.ref.png \
bitmap-font.rgb24.ref.png \
diff --git a/test/Makefile.sources b/test/Makefile.sources
index c91f871..dba2f2c 100644
--- a/test/Makefile.sources
+++ b/test/Makefile.sources
@@ -12,6 +12,7 @@ test_sources = \
big-trap.c \
bilevel-image.c \
bug-bo-rectangular.c \
+ bug-seams.c \
caps.c \
caps-joins.c \
caps-joins-alpha.c \
diff --git a/test/bug-seams.c b/test/bug-seams.c
new file mode 100644
index 0000000..274d87b
--- /dev/null
+++ b/test/bug-seams.c
@@ -0,0 +1,98 @@
+/*
+ * Copyright 2010 Soeren Sandmann Petersen
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Author: Soeren Sandmann <sandmann at daimi.au.dk>
+ */
+
+/* Exercises a case of seam appearing between two polygons in the image
+ * backend but not in xlib [using pixman].
+ */
+
+#include "cairo-test.h"
+
+static void
+draw_quad (cairo_t *cr,
+ double x1, double y1, double x2, double y2,
+ double x3, double y3, double x4, double y4)
+{
+ cairo_move_to (cr, x1, y1);
+ cairo_line_to (cr, x2, y2);
+ cairo_line_to (cr, x3, y3);
+ cairo_line_to (cr, x4, y4);
+ cairo_close_path (cr);
+}
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+ cairo_set_source_rgb (cr, 0, 0, 0);
+ cairo_paint (cr);
+
+ cairo_scale (cr, 20, 20);
+ cairo_translate (cr, 5, 1);
+
+ cairo_push_group (cr);
+ cairo_set_operator (cr, CAIRO_OPERATOR_ADD);
+
+ cairo_set_source_rgb (cr, 0, 0.6, 0);
+ draw_quad (cr,
+ 1.50, 1.50,
+ 2.64, 1.63,
+ 1.75, 2.75,
+ 0.55, 2.63);
+ cairo_fill (cr);
+ draw_quad (cr,
+ 0.55, 2.63,
+ 1.75, 2.75,
+ 0.98, 4.11,
+ -0.35, 4.05);
+ cairo_fill (cr);
+
+ cairo_pop_group_to_source (cr);
+ cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
+ cairo_paint (cr);
+
+ cairo_translate (cr, 10, 0);
+
+ cairo_set_source_rgb (cr, 0, 0.6, 0);
+ draw_quad (cr,
+ 1.50, 1.50,
+ 2.64, 1.63,
+ 1.75, 2.75,
+ 0.55, 2.63);
+ draw_quad (cr,
+ 0.55, 2.63,
+ 1.75, 2.75,
+ 0.98, 4.11,
+ -0.35, 4.05);
+ cairo_fill (cr);
+
+ return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (bug_seams,
+ "Check the fidelity of the rasterisation.",
+ "raster", /* keywords */
+ "target=raster", /* requirements */
+ 500, 300,
+ NULL, draw)
diff --git a/test/bug-seams.ref.png b/test/bug-seams.ref.png
new file mode 100644
index 0000000..d386327
Binary files /dev/null and b/test/bug-seams.ref.png differ
diff --git a/test/bug-seams.xlib-fallback.ref.png b/test/bug-seams.xlib-fallback.ref.png
new file mode 100644
index 0000000..e81fc6c
Binary files /dev/null and b/test/bug-seams.xlib-fallback.ref.png differ
diff --git a/test/bug-seams.xlib.ref.png b/test/bug-seams.xlib.ref.png
new file mode 100644
index 0000000..ac80651
Binary files /dev/null and b/test/bug-seams.xlib.ref.png differ
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