test: add fallback

to get a fallback resolution test included in index.html

test/Makefile.sources

@@ -115,6 +115,7 @@ test_sources = \
 	extend-repeat.c					\
 	extend-repeat-similar.c				\
 	extended-blend.c				\
+	fallback.c					\
 	fill-alpha.c					\
 	fill-alpha-pattern.c				\
 	fill-and-stroke.c				\

test/fallback.c

@@ -0,0 +1,64 @@
+/*
+ * Copyright © 2012 Adrian Johnson
+ *
+ * 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: Adrian Johnson <ajohnson@redneon.com>
+ */
+
+#include "cairo-test.h"
+
+#define SIZE 40
+#define WIDTH (4*SIZE)
+#define HEIGHT WIDTH
+
+#define FALLBACK_RES_X 300
+#define FALLBACK_RES_Y 150
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    cairo_surface_set_fallback_resolution (cairo_get_target (cr), FALLBACK_RES_X, FALLBACK_RES_Y);
+
+    cairo_rotate (cr, M_PI/8);
+    cairo_translate (cr, 2*SIZE, SIZE/16);
+    cairo_scale (cr, 1.5, 1.5);
+
+    cairo_rectangle (cr, 0, 0, SIZE, SIZE);
+    cairo_set_source_rgba (cr, 1, 0, 0, 0.5);
+    cairo_fill (cr);
+
+    /* Select an operator not supported by PDF/PS/SVG to trigger fallback */
+    cairo_set_operator (cr, CAIRO_OPERATOR_SATURATE);
+
+    cairo_rectangle (cr, SIZE/2, SIZE/2, SIZE, SIZE);
+    cairo_set_source_rgba (cr, 0, 1, 0, 0.5);
+    cairo_fill (cr);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (fallback,
+	    "Check that fallback images are correct when fallback resolution is not 72ppi",
+	    "fallback", /* keywords */
+	    NULL, /* requirements */
+	    WIDTH, HEIGHT,
+	    NULL, draw)