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-rw-r--r--test/negative-stride-image.c71
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diff --git a/test/negative-stride-image.c b/test/negative-stride-image.c
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+/*
+ * Copyright 2012 Andrea Canciani
+ *
+ * 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: Andrea Canciani <ranma42@gmail.com>
+ */
+
+#include "cairo-test.h"
+
+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_format_t format = CAIRO_FORMAT_ARGB32;
+ cairo_t *cr_inv;
+ cairo_surface_t *png, *inv;
+ uint8_t *data;
+ int stride;
+
+ png = cairo_test_create_surface_from_png (ctx, png_filename);
+
+ stride = cairo_format_stride_for_width (format, width);
+ data = xcalloc (stride, height);
+ inv = cairo_image_surface_create_for_data (data + stride * (height - 1),
+ format, width, height, -stride);
+
+ cr_inv = cairo_create (inv);
+ cairo_set_source_surface (cr_inv, png, 0, 0);
+ cairo_paint (cr_inv);
+ cairo_destroy (cr_inv);
+
+ cairo_set_source_surface (cr, inv, 0, 0);
+ cairo_paint (cr);
+
+ cairo_surface_destroy (png);
+
+ cairo_surface_finish (inv);
+ cairo_surface_destroy (inv);
+
+ free (data);
+
+ return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (negative_stride_image,
+ "Test that images with a negative stride are handled correctly.",
+ "stride, image", /* keywords */
+ NULL, /* requirements */
+ 256, 192,
+ NULL, draw)