Add font-matrix-translation test case.

test/.gitignore

@@ -46,6 +46,7 @@ ft-font-create-for-ft-face
 ft-text-vertical-layout
 ft-text-antialias-none
 font-face-get-type
+font-matrix-translation
 get-and-set
 get-group-target
 glyph-cache-pressure

test/Makefile.am

@@ -31,6 +31,7 @@ fill-and-stroke-alpha-add	\
 fill-rule			\
 filter-nearest-offset		\
 font-face-get-type		\
+font-matrix-translation		\
 glyph-cache-pressure		\
 get-and-set			\
 get-group-target		\

test/font-matrix-translation.c

@@ -0,0 +1,113 @@
+/*
+ * Copyright © 2006 Red Hat, Inc.
+ *
+ * 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
+ * Red Hat, Inc. not be used in advertising or publicity pertaining to
+ * distribution of the software without specific, written prior
+ * permission. Red Hat, Inc. makes no representations about the
+ * suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL RED HAT, INC. 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: Carl D. Worth <cworth@cworth.org>
+ */
+
+#include "cairo-test.h"
+
+#define TEXT_SIZE 12
+#define PAD 4
+#define TEXT "text"
+
+static cairo_test_draw_function_t draw;
+
+cairo_test_t test = {
+    "font-matrix-translation",
+    "Test that translation in a font matrix can be used to offset a string",
+    38, 34,
+    draw
+};
+
+static void
+box_text (cairo_t *cr, const char *utf8, double x, double y)
+{
+    double line_width;
+    cairo_text_extents_t extents;
+
+    cairo_save (cr);
+
+    cairo_text_extents (cr, utf8, &extents);
+    line_width = cairo_get_line_width (cr);
+    cairo_rectangle (cr,
+		     x + extents.x_bearing - line_width / 2,
+		     y + extents.y_bearing - line_width / 2,
+		     extents.width  + line_width,
+		     extents.height + line_width);
+    cairo_stroke (cr);
+
+    cairo_move_to (cr, x, y);
+    cairo_show_text (cr, utf8);
+
+    cairo_restore (cr);
+}
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    cairo_font_options_t *font_options;
+    cairo_text_extents_t extents;
+    cairo_matrix_t matrix;
+
+    cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */
+    cairo_paint (cr);
+
+    cairo_select_font_face (cr, "Bitstream Vera Sans",
+			    CAIRO_FONT_SLANT_NORMAL,
+			    CAIRO_FONT_WEIGHT_NORMAL);
+    cairo_set_font_size (cr, TEXT_SIZE);
+
+    font_options = cairo_font_options_create ();
+
+    cairo_font_options_set_hint_style (font_options, CAIRO_HINT_STYLE_NONE);
+    cairo_font_options_set_antialias (font_options, CAIRO_ANTIALIAS_GRAY);
+
+    cairo_set_font_options (cr, font_options);
+    cairo_font_options_destroy (font_options);
+
+    cairo_translate (cr, PAD, PAD);
+    cairo_set_line_width (cr, 1.0);
+
+    cairo_text_extents (cr, TEXT, &extents);
+
+    /* Draw text and bounding box */
+    cairo_set_source_rgb (cr, 0, 0, 0); /* black */
+    box_text (cr, TEXT, 0, - extents.y_bearing);
+
+    /* Then draw again with the same coordinates, but with a font
+     * matrix to position the text below and shifted a bit to the
+     * right. */
+    cairo_matrix_init_translate (&matrix, TEXT_SIZE / 2, TEXT_SIZE + PAD);
+    cairo_matrix_scale (&matrix, TEXT_SIZE, TEXT_SIZE);
+    cairo_set_font_matrix (cr, &matrix);
+
+    cairo_set_source_rgb (cr, 0, 0, 1); /* blue */
+    box_text (cr, TEXT, 0, - extents.y_bearing);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+int
+main (void)
+{
+    return cairo_test (&test);
+}