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diff --git a/test/filter-nearest-transformed.c b/test/filter-nearest-transformed.c
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+/*
+ * Copyright © 2008 Chris Wilson
+ *
+ * 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: Chris Wilson <chris@chris-wilson.co.uk>
+ */
+
+#include "cairo-test.h"
+
+/*
+ * We wish to check the optimization away of non-fractional translations
+ * for NEAREST surface patterns under a few transformations.
+ */
+
+static const char png_filename[] = "romedalen.png";
+
+/* A single, black pixel */
+static const uint32_t black_pixel = 0xff000000;
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+ const cairo_test_context_t *ctx = cairo_test_get_context (cr);
+ unsigned int i, j, k;
+ cairo_surface_t *surface;
+ cairo_pattern_t *pattern;
+ const cairo_matrix_t transform[] = {
+ { 1, 0, 0, 1, 0, 0 },
+ { -1, 0, 0, 1, 8, 0 },
+ { 1, 0, 0, -1, 0, 8 },
+ { -1, 0, 0, -1, 8, 8 },
+ };
+ const cairo_matrix_t ctx_transform[] = {
+ { 1, 0, 0, 1, 0, 0 },
+ { -1, 0, 0, 1, 14, 0 },
+ { 1, 0, 0, -1, 0, 14 },
+ { -1, 0, 0, -1, 14, 14 },
+ };
+ const double colour[][3] = {
+ {0, 0, 0},
+ {1, 0, 0},
+ {0, 1, 0},
+ {0, 0, 1},
+ };
+ cairo_matrix_t m;
+
+ surface = cairo_image_surface_create_for_data ((uint8_t *) &black_pixel,
+ CAIRO_FORMAT_ARGB32,
+ 1, 1, 4);
+ pattern = cairo_pattern_create_for_surface (surface);
+ cairo_surface_destroy (surface);
+
+ cairo_pattern_set_filter (pattern, CAIRO_FILTER_NEAREST);
+
+ surface = cairo_test_create_surface_from_png (ctx, png_filename);
+
+ /* Fill background white */
+ cairo_set_source_rgb (cr, 1, 1, 1);
+ cairo_paint (cr);
+
+ cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
+
+ for (k = 0; k < ARRAY_LENGTH (transform); k++) {
+ /* draw a "large" section from an image */
+ cairo_save (cr); {
+ cairo_set_matrix(cr, &ctx_transform[k]);
+ cairo_rectangle (cr, 0, 0, 7, 7);
+ cairo_clip (cr);
+
+ cairo_set_source_surface (cr, surface,
+ -cairo_image_surface_get_width (surface)/2.,
+ -cairo_image_surface_get_height (surface)/2.);
+ cairo_pattern_set_filter (cairo_get_source (cr), CAIRO_FILTER_NEAREST);
+ cairo_paint (cr);
+ } cairo_restore (cr);
+
+ cairo_set_source_rgb (cr, colour[k][0], colour[k][1], colour[k][2]);
+ for (j = 4; j <= 6; j++) {
+ for (i = 4; i <= 6; i++) {
+ cairo_matrix_init_translate (&m,
+ -(2*(i-4) + .1*i),
+ -(2*(j-4) + .1*j));
+ cairo_matrix_multiply (&m, &m, &transform[k]);
+ cairo_pattern_set_matrix (pattern, &m);
+ cairo_mask (cr, pattern);
+ }
+ }
+ }
+
+ cairo_pattern_destroy (pattern);
+ cairo_surface_destroy (surface);
+
+ return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (filter_nearest_transformed,
+ "Test sample position when drawing transformed images with FILTER_NEAREST",
+ "filter, nearest", /* keywords */
+ NULL,
+ 14, 14,
+ NULL, draw)