[test] Add clip-image

Exercise the XCopyArea() paths under clipping - whilst modifying that code
I noticed that it was not being exercised by the test suite.

4 files changed, 96 insertions, 0 deletions

diff --git a/test/Makefile.am b/test/Makefile.am
index 4ac776ff..aaa520d5 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -177,6 +177,7 @@ REFERENCE_IMAGES = \
 	clip-fill-rule.rgb24.ref.png \
 	clip-fill-rule.test-paginated.rgb24.ref.png \
 	clip-fill-rule.xlib.rgb24.ref.png \
+	clip-image.ref.png \
 	clip-nesting.pdf.argb32.ref.png \
 	clip-nesting.ps2.argb32.ref.png \
 	clip-nesting.ps2.rgb24.ref.png \
diff --git a/test/Makefile.sources b/test/Makefile.sources
index c4f2516c..3dbdd551 100644
--- a/test/Makefile.sources
+++ b/test/Makefile.sources
@@ -18,6 +18,7 @@ test_sources = \
 	clip-fill.c					\
 	clip-fill-rule.c				\
 	clip-fill-rule-pixel-aligned.c			\
+	clip-image.c					\
 	clip-nesting.c					\
 	clip-operator.c					\
 	clip-push-group.c				\
diff --git a/test/clip-image.c b/test/clip-image.c
new file mode 100644
index 00000000..e3c88095
--- /dev/null
+++ b/test/clip-image.c
@@ -0,0 +1,94 @@
+/*
+ * Copyright 2009 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@chris-wilson.co.uk>
+ */
+
+#include "cairo-test.h"
+
+#define WIDTH 20
+#define HEIGHT 20
+
+static const char *png_filename = "romedalen.png";
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    const cairo_test_context_t *ctx = cairo_test_get_context (cr);
+    cairo_surface_t *image;
+
+    cairo_set_source_rgb (cr, 1, 1, 1);
+    cairo_paint (cr);
+
+    image = cairo_test_create_surface_from_png (ctx, png_filename);
+    cairo_set_source_surface (cr, image, 0, 0);
+
+    /* simple clip */
+    cairo_save (cr);
+    cairo_rectangle (cr, 2, 2, 16, 16);
+    cairo_clip (cr);
+    cairo_paint (cr);
+    cairo_restore (cr);
+
+    cairo_translate (cr, WIDTH, 0);
+
+    /* unaligned clip */
+    cairo_save (cr);
+    cairo_rectangle (cr, 2.5, 2.5, 15, 15);
+    cairo_clip (cr);
+    cairo_paint (cr);
+    cairo_restore (cr);
+
+    cairo_translate (cr, -WIDTH, HEIGHT);
+
+    /* aligned-clip */
+    cairo_save (cr);
+    cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
+    cairo_rectangle (cr, 0, 0, 20, 20);
+    cairo_rectangle (cr, 3, 3, 10, 10);
+    cairo_rectangle (cr, 7, 7, 10, 10);
+    cairo_clip (cr);
+    cairo_paint (cr);
+    cairo_restore (cr);
+
+    cairo_translate (cr, WIDTH, 0);
+
+    /* force a clip-mask */
+    cairo_save (cr);
+    cairo_arc (cr, 10, 10, 10, 0, 2 * M_PI);
+    cairo_new_sub_path (cr);
+    cairo_arc_negative (cr, 10, 10, 5, 2 * M_PI, 0);
+    cairo_new_sub_path (cr);
+    cairo_arc (cr, 10, 10, 2, 0, 2 * M_PI);
+    cairo_clip (cr);
+    cairo_paint (cr);
+    cairo_restore (cr);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (clip_image,
+	    "Tests painting an image through complex clips.",
+	    "clip, paint", /* keywords */
+	    NULL, /* requirements */
+	    2 * WIDTH, 2 * HEIGHT,
+	    NULL, draw)
diff --git a/test/clip-image.ref.png b/test/clip-image.ref.png
new file mode 100644
index 00000000..b038f2a6
--- /dev/null
+++ b/test/clip-image.ref.png