diff options
Diffstat (limited to 'test/text-zero-len.c')
-rw-r--r-- | test/text-zero-len.c | 203 |
1 files changed, 0 insertions, 203 deletions
diff --git a/test/text-zero-len.c b/test/text-zero-len.c deleted file mode 100644 index 5e89816c8..000000000 --- a/test/text-zero-len.c +++ /dev/null @@ -1,203 +0,0 @@ -/* - * 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: Behdad Esfahbod <behdad@behdad.org> - */ - -/* Related bug 5177 - * - * In short: - * - * _cairo_atsui_font_text_to_glyph with a zero-sized string crashes. - * - * Moreover, the fallback path in cairo_scaled_font_text_to_glyphs() - * when handling a zero-sized string, allocates a zero-sized glyph array - * and when NULL is returned by malloc, recognizes that as an out-of-memory - * error. The glibc implementation of malloc() does not return NULL from - * malloc(0), but I don't think it's a safe assumption. - * - * By just bailing out on zero-sized text, we fix both issues. - */ - -#include "cairo-test.h" - -#define NUM_TEXT 20 -#define TEXT_SIZE 12 - -static cairo_bool_t -text_extents_equal (const cairo_text_extents_t *A, - const cairo_text_extents_t *B) -{ - return A->x_bearing == B->x_bearing && - A->y_bearing == B->y_bearing && - A->width == B->width && - A->height == B->height && - A->x_advance == B->x_advance && - A->y_advance == B->y_advance; -} - -static cairo_bool_t -font_extents_equal (const cairo_font_extents_t *A, - const cairo_font_extents_t *B) -{ - return A->ascent == B->ascent && - A->descent == B->descent && - A->height == B->height && - A->max_x_advance == B->max_x_advance && - A->max_y_advance == B->max_y_advance; -} - -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_text_extents_t extents, nil_extents; - cairo_font_extents_t font_extents, nil_font_extents; - cairo_scaled_font_t *scaled_font; - - cairo_select_font_face (cr, CAIRO_TEST_FONT_FAMILY " Sans", - CAIRO_FONT_SLANT_NORMAL, - CAIRO_FONT_WEIGHT_NORMAL); - cairo_set_font_size (cr, 16); - - cairo_move_to (cr, 10, 25); - cairo_show_text (cr, NULL); - cairo_show_text (cr, ""); - cairo_show_glyphs (cr, NULL, 0); - cairo_show_glyphs (cr, (void*)8, 0); - - cairo_move_to (cr, 10, 55); - cairo_text_path (cr, NULL); - cairo_text_path (cr, ""); - cairo_glyph_path (cr, (void*)8, 0); - cairo_fill (cr); - - memset (&nil_extents, 0, sizeof (cairo_text_extents_t)); - - memset (&extents, 0xff, sizeof (cairo_text_extents_t)); - cairo_text_extents (cr, "", &extents); - if (! text_extents_equal (&extents, &nil_extents)) { - cairo_test_log (ctx, "Error: cairo_text_extents(\"\"); extents (%g, %g, %g, %g, %g, %g)\n", - extents.x_bearing, extents.y_bearing, - extents.width, extents.height, - extents.x_advance, extents.y_advance); - return CAIRO_TEST_FAILURE; - } - - memset (&extents, 0xff, sizeof (cairo_text_extents_t)); - cairo_text_extents (cr, NULL, &extents); - if (! text_extents_equal (&extents, &nil_extents)) { - cairo_test_log (ctx, "Error: cairo_text_extents(NULL); extents (%g, %g, %g, %g, %g, %g)\n", - extents.x_bearing, extents.y_bearing, - extents.width, extents.height, - extents.x_advance, extents.y_advance); - return CAIRO_TEST_FAILURE; - } - - memset (&extents, 0xff, sizeof (cairo_text_extents_t)); - cairo_glyph_extents (cr, (void*)8, 0, &extents); - if (! text_extents_equal (&extents, &nil_extents)) { - cairo_test_log (ctx, "Error: cairo_glyph_extents(); extents (%g, %g, %g, %g, %g, %g)\n", - extents.x_bearing, extents.y_bearing, - extents.width, extents.height, - extents.x_advance, extents.y_advance); - return CAIRO_TEST_FAILURE; - } - - scaled_font = cairo_get_scaled_font (cr); - - memset (&extents, 0xff, sizeof (cairo_text_extents_t)); - cairo_scaled_font_text_extents (scaled_font, "", &extents); - if (! text_extents_equal (&extents, &nil_extents)) { - cairo_test_log (ctx, "Error: cairo_scaled_font_text_extents(\"\"); extents (%g, %g, %g, %g, %g, %g)\n", - extents.x_bearing, extents.y_bearing, - extents.width, extents.height, - extents.x_advance, extents.y_advance); - return CAIRO_TEST_FAILURE; - } - - memset (&extents, 0xff, sizeof (cairo_text_extents_t)); - cairo_scaled_font_text_extents (scaled_font, NULL, &extents); - if (! text_extents_equal (&extents, &nil_extents)) { - cairo_test_log (ctx, "Error: cairo_scaled_font_text_extents(NULL); extents (%g, %g, %g, %g, %g, %g)\n", - extents.x_bearing, extents.y_bearing, - extents.width, extents.height, - extents.x_advance, extents.y_advance); - return CAIRO_TEST_FAILURE; - } - - memset (&extents, 0xff, sizeof (cairo_text_extents_t)); - cairo_scaled_font_glyph_extents (scaled_font, (void*)8, 0, &extents); - if (! text_extents_equal (&extents, &nil_extents)) { - cairo_test_log (ctx, "Error: cairo_scaled_font_glyph_extents(NULL); extents (%g, %g, %g, %g, %g, %g)\n", - extents.x_bearing, extents.y_bearing, - extents.width, extents.height, - extents.x_advance, extents.y_advance); - return CAIRO_TEST_FAILURE; - } - - /* Lets also try font size 0 while here */ - cairo_set_font_size (cr, 0); - - memset (&extents, 0xff, sizeof (cairo_text_extents_t)); - cairo_text_extents (cr, "test", &extents); - if (! text_extents_equal (&extents, &nil_extents)) { - cairo_test_log (ctx, "Error: cairo_set_font_size(0); cairo_text_extents(\"test\"); extents (%g, %g, %g, %g, %g, %g)\n", - extents.x_bearing, extents.y_bearing, - extents.width, extents.height, - extents.x_advance, extents.y_advance); - return CAIRO_TEST_FAILURE; - } - - memset (&nil_font_extents, 0, sizeof (cairo_font_extents_t)); - - memset (&font_extents, 0xff, sizeof (cairo_font_extents_t)); - cairo_font_extents (cr, &font_extents); - if (! font_extents_equal (&font_extents, &nil_font_extents)) { - cairo_test_log (ctx, "Error: cairo_set_font_size(0); cairo_font_extents(); extents (%g, %g, %g, %g, %g)\n", - font_extents.ascent, font_extents.descent, - font_extents.height, - font_extents.max_x_advance, font_extents.max_y_advance); - return CAIRO_TEST_FAILURE; - } - - scaled_font = cairo_get_scaled_font (cr); - - memset (&font_extents, 0xff, sizeof (cairo_font_extents_t)); - cairo_scaled_font_extents (scaled_font, &font_extents); - if (! font_extents_equal (&font_extents, &nil_font_extents)) { - cairo_test_log (ctx, "Error: cairo_set_font_size(0); cairo_scaled_font_extents(); extents (%g, %g, %g, %g, %g)\n", - font_extents.ascent, font_extents.descent, - font_extents.height, - font_extents.max_x_advance, font_extents.max_y_advance); - return CAIRO_TEST_FAILURE; - } - - return CAIRO_TEST_SUCCESS; -} - -CAIRO_TEST (text_zero_len, - "Tests show_text and text_path with a zero-sized string", - "text, stress, extents", /* keywords */ - NULL, /* requirements */ - 0, 0, - NULL, draw) |