add cairo

1 files changed, 125 insertions, 0 deletions

diff --git a/libs/cairo-1.16.0/test/text-glyph-range.c b/libs/cairo-1.16.0/test/text-glyph-range.c
new file mode 100644
index 0000000..75b87d6
--- /dev/null
+++ b/libs/cairo-1.16.0/test/text-glyph-range.c
@@ -0,0 +1,125 @@
+/* -*- Mode: c; c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t; -*- */
+/* cairo - a vector graphics library with display and print output
+ *
+ * Copyright © 2006 Brian Ewins.
+ *
+ * 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
+ * Brian Ewins not be used in advertising or publicity pertaining to
+ * distribution of the software without specific, written prior
+ * permission. Brian Ewins makes no representations about the
+ * suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * BRIAN EWINS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL BRIAN EWINS 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: Brian Ewins <Brian.Ewins@gmail.com>
+ */
+
+/* Related to bug 9530
+ *
+ * cairo_glyph_t can contain any unsigned long in its 'index', the intention
+ * being that it is large enough to hold a pointer. However, this means that
+ * it can specify many glyph indexes which don't exist in the font, and may
+ * exceed the range of legal glyph indexes for the font backend. It may
+ * also contain special values that are not usable as indexes - e.g. 0xffff is
+ * kATSDeletedGlyphcode in ATSUI, a glyph that should not be drawn.
+ * The font backends should handle all legal and out-of-range values
+ * consistently.
+ *
+ * This test expects that operations on out-of-range and missing glyphs should
+ * act as if they were zero-width.
+ */
+
+#include "cairo-test.h"
+
+#define WIDTH  100
+#define HEIGHT 75
+#define NUM_TEXT 20
+#define TEXT_SIZE 12
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    cairo_text_extents_t extents;
+    int i;
+    /* Glyphs with no paths followed by 'cairo', the additional
+     * text is to make the space obvious.
+     */
+    long int index[] = {
+	0, /* 'no matching glyph' */
+	0xffff, /* kATSDeletedGlyphCode */
+	0x1ffff, /* out of range */
+	-1L, /* out of range */
+	70, 68, 76, 85, 82 /* 'cairo' */
+    };
+
+    /* We draw in the default black, so paint white first. */
+    cairo_save (cr);
+    cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */
+    cairo_paint (cr);
+    cairo_restore (cr);
+
+    cairo_select_font_face (cr, CAIRO_TEST_FONT_FAMILY " Sans",
+			    CAIRO_FONT_SLANT_NORMAL,
+			    CAIRO_FONT_WEIGHT_NORMAL);
+    cairo_set_font_size (cr, 16);
+
+    for (i = 0; i < 9; i++) {
+	/* since we're just drawing glyphs directly we need to position them. */
+	cairo_glyph_t glyph = {
+	    index[i], 10 * i, 25
+	};
+
+	/* test cairo_glyph_extents. Every glyph index should
+	 * have extents, invalid glyphs should be zero-width.
+	 */
+	cairo_move_to (cr, glyph.x, glyph.y);
+	cairo_set_line_width (cr, 1.0);
+	cairo_glyph_extents (cr, &glyph, 1, &extents);
+	cairo_rectangle (cr,
+			 glyph.x + extents.x_bearing - 0.5,
+			 glyph.y + extents.y_bearing - 0.5,
+			 extents.width + 1,
+			 extents.height + 1);
+	cairo_set_source_rgb (cr, 1, 0, 0); /* red */
+	cairo_stroke (cr);
+
+	/* test cairo_show_glyphs. Every glyph index should be
+	 * drawable, invalid glyph indexes should draw nothing.
+	 */
+	cairo_set_source_rgb (cr, 0, 0, 0); /* black */
+	cairo_show_glyphs (cr, &glyph, 1);
+	cairo_move_to (cr, glyph.x, glyph.y);
+
+	/* test cairo_glyph_path. Every glyph index should produce
+	 * a path, invalid glyph indexes should have empty paths.
+	 */
+	/* Change the glyph position
+	 * so that the paths are visible.
+	 */
+	glyph.y = 55;
+	cairo_move_to (cr, glyph.x, glyph.y);
+	cairo_glyph_path (cr, &glyph, 1);
+	cairo_fill (cr);
+    }
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (text_glyph_range,
+	    "Tests show_glyphs, glyph_path, glyph_extents with out of range glyph ids."
+	    "\nft and atsui font backends fail, misreporting errors from FT_Load_Glyph and ATSUGlyphGetCubicPaths",
+	    "text, stress", /* keywords */
+	    NULL, /* requirements */
+	    WIDTH, HEIGHT,
+	    NULL, draw)