/* * Copyright © 2005 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> */ #include "cairo-test.h" #include "cairo-boilerplate-scaled-font.h" #define TEXT_SIZE 12 /* Bug history * * 2006-06-22 Carl Worth <cworth@cworth.org> * * This is a test case to demonstrate the following bug in the xlib backend: * * Some characters aren't displayed when using xlib (cache usage missing freeze/thaw) * https://bugs.freedesktop.org/show_bug.cgi?id=6955 * * We replicate this bug by using the cairo_scaled_font_set_max_glyphs_per_font * function to artifically induce cache pressure. (This function was added * for this very purpose.) * * 2006-06-22 Carl Worth <cworth@cworth.org> * * Bug was simple enough to solve by just adding a freeze/thaw pair * around the scaled_font's glyph cache in * _cairo_xlib_surface_show_glyphs, (I went ahead and added * _cairo_sacled_font_freeze/thaw_cache functions for this). */ static cairo_test_status_t draw (cairo_t *cr, int width, int height) { /* 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, TEXT_SIZE); cairo_set_source_rgb (cr, 0, 0, 0); /* black */ cairo_boilerplate_scaled_font_set_max_glyphs_cached (cairo_get_scaled_font (cr), 1); cairo_move_to (cr, 1, TEXT_SIZE); cairo_show_text (cr, "the five boxing wizards jump quickly"); return CAIRO_TEST_SUCCESS; } CAIRO_TEST (glyph_cache_pressure, "Ensure that all backends behave well under artificial glyph cache pressure", "stress", /* keywords */ NULL, /* requirements */ 223, TEXT_SIZE + 4, NULL, draw)