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author | Carl Worth <cworth@cworth.org> | 2006-06-22 22:05:20 -0700 |
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committer | Carl Worth <cworth@cworth.org> | 2006-06-22 22:05:20 -0700 |
commit | 6a58658b73924fa6897bd1e290d754ce1df44b0d (patch) | |
tree | 594256446c88c880a550a83aa84cbc95790dc3ad /test/glyph-cache-pressure.c | |
parent | 333ac8f4d9ccc356cb91e7118ed56bfc07e78c2f (diff) | |
download | cairo-6a58658b73924fa6897bd1e290d754ce1df44b0d.tar.gz |
Add test/glyph-cache-pressure to demonstrate xlib failure (bug 6955)
Diffstat (limited to 'test/glyph-cache-pressure.c')
-rw-r--r-- | test/glyph-cache-pressure.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/test/glyph-cache-pressure.c b/test/glyph-cache-pressure.c new file mode 100644 index 000000000..b9ea4e19b --- /dev/null +++ b/test/glyph-cache-pressure.c @@ -0,0 +1,89 @@ +/* + * 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-scaled-font-test.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.) + */ + +cairo_test_t test = { + "glyph-cache-pressure", + "Ensure that all backends behave well under artificial glyph cache pressure", + 223, TEXT_SIZE + 4 +}; + +static cairo_test_status_t +draw (cairo_t *cr, int width, int height) +{ + cairo_font_options_t *font_options; + + /* 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_scaled_font_test_set_max_glyphs_cached_per_font (1); + + cairo_select_font_face (cr, "Bitstream Vera Sans", + CAIRO_FONT_SLANT_NORMAL, + CAIRO_FONT_WEIGHT_NORMAL); + cairo_set_font_size (cr, TEXT_SIZE); + + font_options = cairo_font_options_create (); + + cairo_font_options_set_hint_style (font_options, CAIRO_HINT_STYLE_NONE); + cairo_font_options_set_antialias (font_options, CAIRO_ANTIALIAS_GRAY); + + cairo_set_font_options (cr, font_options); + cairo_font_options_destroy (font_options); + + cairo_set_source_rgb (cr, 0, 0, 0); /* black */ + + cairo_move_to (cr, 1, TEXT_SIZE); + cairo_show_text (cr, "the five boxing wizards jump quickly"); + + return CAIRO_TEST_SUCCESS; +} + +int +main (void) +{ + return cairo_test (&test, draw); +} |