/* * Copyright © 2004 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> */ /* Bug history * * 2004-11-04 Ned Konz <ned@squeakland.org> * * Reported bug on mailing list: * * From: Ned Konz <ned@squeakland.org> * To: cairo@cairographics.org * Date: Thu, 4 Nov 2004 09:49:38 -0800 * Subject: [cairo] getting assertions [cairo_cache.c:143: _entry_destroy: * Assertion `cache->used_memory > entry->memory' failed] * * The attached program dies on me with the assert * * $ ./testCairo * testCairo: cairo_cache.c:143: _entry_destroy: Assertion `cache->used_memory > entry->memory' failed. * * 2004-11-04 Carl Worth <cworth@cworth.org> * * I trimmed down Ned's example to the folllowing test while still * maintaining the assertion. * * Oh, actually, it looks like I may have triggered something * slightly different: * * text_cache_crash: cairo_cache.c:422: _cairo_cache_lookup: Assertion `cache->max_memory >= (cache->used_memory + new_entry->memory)' failed. * * I'll have to go back and try the original test after I fix this. * * 2004-11-13 Carl Worth <cworth@cworth.org> * * Found the bug. cairo_gstate_select_font was noticing when the * same font was selected twice in a row and was erroneously failing * to free the old reference. Committed a fix and verified it also * fixed the original test case. */ #include "cairo-test.h" static cairo_test_status_t draw (cairo_t *cr, int width, int height) { /* Once there was a bug that choked when selecting the same font twice. */ cairo_select_font_face (cr, "sans", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_BOLD); cairo_set_font_size (cr, 40.0); cairo_select_font_face (cr, "sans", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_BOLD); cairo_set_font_size (cr, 40.0); cairo_move_to (cr, 10, 50); cairo_show_text (cr, "hello"); /* Then there was a bug that choked when selecting a font too big * for the cache. */ cairo_set_font_size (cr, 500); cairo_show_text (cr, "hello"); return CAIRO_TEST_SUCCESS; } CAIRO_TEST (text_cache_crash, "Test case for bug causing an assertion failure in _cairo_cache_lookup", "text, stress", /* keywords */ NULL, /* requirements */ 0, 0, NULL, draw)