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ab29396ef9
The test passes an empty string to cairo_show_text, cairo_text_path, and cairo_text_extents, and NULL and an invalid pointer, with zero num_glyphs to cairo_show_glyphs, cairo_glyph_path, and cairo_glyph_extents.
88 lines
2.7 KiB
C
88 lines
2.7 KiB
C
/*
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* Copyright © 2006 Red Hat, Inc.
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*
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* Permission to use, copy, modify, distribute, and sell this software
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* and its documentation for any purpose is hereby granted without
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* fee, provided that the above copyright notice appear in all copies
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* and that both that copyright notice and this permission notice
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* appear in supporting documentation, and that the name of
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* Red Hat, Inc. not be used in advertising or publicity pertaining to
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* distribution of the software without specific, written prior
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* permission. Red Hat, Inc. makes no representations about the
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* suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
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* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,
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* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
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* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
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* IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Author: Behdad Esfahbod <behdad@behdad.org>
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*/
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/* Related bug 5177
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*
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* In short:
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*
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* _cairo_atsui_font_text_to_glyph with a zero-sized string crashes.
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*
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* Moreover, the fallback path in cairo_scaled_font_text_to_glyphs()
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* when handling a zero-sized string, allocates a zero-sized glyph array
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* and when NULL is returned by malloc, recognizes that as an out-of-memory
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* error. The glibc implementation of malloc() does not return NULL from
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* malloc(0), but I don't think it's a safe assumption.
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*
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* By just bailing out on zero-sized text, we fix both issues.
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*/
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#include "cairo-test.h"
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#define WIDTH 60
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#define HEIGHT 60
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#define NUM_TEXT 20
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#define TEXT_SIZE 12
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static cairo_test_draw_function_t draw;
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cairo_test_t test = {
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"text-zero-len",
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"Tests show_text and text_path with a zero-sized string",
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WIDTH, HEIGHT,
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draw
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};
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/* Draw the word cairo at NUM_TEXT different angles */
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static cairo_test_status_t
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draw (cairo_t *cr, int width, int height)
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{
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cairo_text_extents_t extents;
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cairo_select_font_face (cr, "Bitstream Vera Sans",
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CAIRO_FONT_SLANT_NORMAL,
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CAIRO_FONT_WEIGHT_NORMAL);
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cairo_set_font_size (cr, 16);
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cairo_move_to (cr, 10, 25);
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cairo_show_text (cr, "");
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cairo_show_glyphs (cr, NULL, 0);
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cairo_show_glyphs (cr, (void*)8, 0);
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cairo_move_to (cr, 10, 55);
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cairo_text_path (cr, "");
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cairo_glyph_path (cr, (void*)8, 0);
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cairo_fill (cr);
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cairo_text_extents (cr, "", &extents);
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cairo_glyph_extents (cr, (void*)8, 0, &extents);
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return CAIRO_TEST_SUCCESS;
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}
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int
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main (void)
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{
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return cairo_test (&test);
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}
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