| /* |
| * 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) |