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e90073f7dd
Avoid calling libtool to link every single test case, by building just one binary from all the sources. This binary is then given the task of choosing tests to run (based on user selection and individual test requirement), forking each test into its own process and accumulating the results.
168 lines
5.1 KiB
C
168 lines
5.1 KiB
C
/*
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* Copyright © 2006 Red Hat, Inc.
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*
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* Permission to use, copy, modify, distribute, and sell this software
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* and its documentation for any purpose is hereby granted without
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* fee, provided that the above copyright notice appear in all copies
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* and that both that copyright notice and this permission notice
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* appear in supporting documentation, and that the name of
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* Red Hat, Inc. not be used in advertising or publicity pertaining to
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* distribution of the software without specific, written prior
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* permission. Red Hat, Inc. makes no representations about the
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* suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
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* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,
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* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
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* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
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* IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Author: Carl D. Worth <cworth@cworth.org>
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*/
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#include "cairo-test.h"
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#include <string.h>
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/* Bug history
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*
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* 2006-01-07 Jon Hellan <hellan@acm.org>
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*
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* Jon opened the following bug report:
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*
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* _XError from XRenderCompositeText8
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* https://bugs.freedesktop.org/show_bug.cgi?id=5528
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*
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* 2006-03-02 Carl Worth <cworth@cworth.org>
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*
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* I wrote this test case to demonstrate the bug.
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*
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* Approach:
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*
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* Draw 65535 glyphs white-on-white all on top of each other.
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*
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* Rationale:
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*
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* The number 65535 comes from the original bug report.
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*
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* I would use cairo_show_text with a long string of 'x's say,
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* but then the surface would need to be enormous to contain
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* them. A smaller surface could be used, but I fear that at some
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* point the off-surface glyph drawing would be optimized away
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* and not exercise the bug.
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*
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* So, to keep the surface size under control, I use
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* cairo_show_glyphs which allows me to place the glyphs all on
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* top of each other. But, since cairo doesn't provide any
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* character-to-glyphs mapping, I can't get a reliable glyph
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* index (for character 'x' for example). So I just "guess" a
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* glyph index and use white-on-white drawing to ignore the
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* result. (I don't care what's drawn---I just want to ensure
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* that things don't crash.)
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*
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* Status: I replicated bug. The largest value of NUM_GLYPHS for
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* which I saw success is 21842.
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*
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* 2008-30-08 Chris Wilson <chris@chris-wilson.co.uk>
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* This is also a valid test case for:
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*
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* Bug 5913 crash on overlong string
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* https://bugs.freedesktop.org/show_bug.cgi?id=5913
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*
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* which is still causing a crash in the Xlib backend - presumably, just
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* a miscalculation of the length of the available request.
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*/
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#define TEXT_SIZE 12
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#define NUM_GLYPHS 65535
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static cairo_test_status_t
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get_glyph (cairo_t *cr, const char *utf8, cairo_glyph_t *glyph)
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{
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cairo_glyph_t *text_to_glyphs;
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cairo_status_t status;
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int i;
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text_to_glyphs = glyph;
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i = 1;
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status = cairo_scaled_font_text_to_glyphs (cairo_get_scaled_font (cr),
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0, 0,
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utf8, -1,
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&text_to_glyphs, &i,
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NULL, NULL,
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0);
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if (status != CAIRO_STATUS_SUCCESS)
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return cairo_test_status_from_status (cairo_test_get_context (cr),
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status);
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if (text_to_glyphs != glyph) {
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*glyph = text_to_glyphs[0];
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cairo_glyph_free (text_to_glyphs);
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}
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return CAIRO_TEST_SUCCESS;
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}
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static cairo_test_status_t
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draw (cairo_t *cr, int width, int height)
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{
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cairo_glyph_t glyphs[NUM_GLYPHS];
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const char *characters[] = { /* try to exercise different widths of index */
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"m", /* Latin letter m, index=0x50 */
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"μ", /* Greek letter mu, index=0x349 */
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NULL,
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}, **utf8;
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int i, j;
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cairo_status_t status;
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/* Paint white background. */
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cairo_set_source_rgb (cr, 1, 1, 1);
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cairo_paint (cr);
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cairo_select_font_face (cr, "Sans",
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CAIRO_FONT_SLANT_NORMAL,
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CAIRO_FONT_WEIGHT_NORMAL);
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cairo_set_font_size (cr, TEXT_SIZE);
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for (utf8 = characters; *utf8 != NULL; utf8++) {
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status = get_glyph (cr, *utf8, &glyphs[0]);
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if (status)
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return status;
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if (glyphs[0].index) {
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glyphs[0].x = 1.0;
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glyphs[0].y = height - 1;
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for (i=1; i < NUM_GLYPHS; i++)
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glyphs[i] = glyphs[0];
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cairo_show_glyphs (cr, glyphs, NUM_GLYPHS);
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}
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}
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/* we can pack ~21k 1-byte glyphs into a single XRenderCompositeGlyphs8 */
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status = get_glyph (cr, "m", &glyphs[0]);
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if (status)
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return status;
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for (i=1; i < 21500; i++)
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glyphs[i] = glyphs[0];
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/* so check expanding the current 1-byte request for 2-byte glyphs */
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status = get_glyph (cr, "μ", &glyphs[i]);
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if (status)
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return status;
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for (j=i+1; j < NUM_GLYPHS; j++)
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glyphs[j] = glyphs[i];
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cairo_show_glyphs (cr, glyphs, NUM_GLYPHS);
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return CAIRO_TEST_SUCCESS;
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}
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CAIRO_TEST (show_glyphs_many,
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"Test that cairo_show_glyphs works when handed 'many' glyphs",
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"text, stress", /* keywords */
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NULL, /* requirements */
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9, 11,
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NULL, draw)
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