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655a4dbc36
Instead of tagging the sources, which is insensitive to changes, track the known failure modes by recording the current fail as an xfail.png reference. (We also introduce a new.png to track a fresh error, so that they are not lost in the noise of the old XFAILs and hopefully do not cause everyone to fret). As we have removed the XFAIL tagging we find, surprise surprise, that some tests are now working -- so review all the reference images (as also some .ref.png now should be .xfail.png). Note: I've only checked image,pdf,ps,svg. The test surfaces report some failures that probably need to addressed in source. I've not correct the changes for win32 and quartz. Nor fixed up the experimental backends.
91 lines
3.6 KiB
C
91 lines
3.6 KiB
C
/*
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* Copyright © 2006 Mozilla Corporation
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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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* Mozilla Corporation 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. Mozilla Corporation 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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* MOZILLA CORPORATION 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 MOZILLA CORPORATION 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: Vladimir Vukicevic <vladimir@pobox.com>
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*/
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#include "cairo-test.h"
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/* This test was originally written to exercise a bug in pixman in
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* which it would scribble all over memory when given a particular
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* (and bogus) trapezoid. However, a recent change to
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* _cairo_fixed_from_double changed the details of the bogus trapezoid
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* (it overflows in a different way now), so the bug is being masked.
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*
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* According to Vladimir, (http://lists.freedesktop.org/archives/cairo/2006-November/008482.html):
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*
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* Before the change, the two trapezoids that were generated were:
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*
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* Trap[0]: T: 0x80000000 B: 0x80000003
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* L: [(0x000a0000, 0x80000000) (0x00080000, 0x00080000)]
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* R: [(0x01360000, 0x80000000) (0x01380000, 0x00080000)]
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* Trap[1]: T: 0x80000003 B: 0x00080000
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* L: [(0x000a0000, 0x80000000) (0x00080000, 0x00080000)]
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* R: [(0x01360000, 0x80000000) (0x01380000, 0x00080000)]
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*
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* After the change, the L/R coordinates are identical for both traps, but
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* the top and bottom change:
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*
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* Trap[0]: t: 0x80000000 b: 0xfda80003
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* l: [(0x000a0000, 0x80000000) (0x00080000, 0x00080000)]
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* r: [(0x01360000, 0x80000000) (0x01380000, 0x00080000)]
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* Trap[1]: t: 0xfda80003 b: 0x00080000
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* l: [(0x000a0000, 0x80000000) (0x00080000, 0x00080000)]
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* r: [(0x01360000, 0x80000000) (0x01380000, 0x00080000)]
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*
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* I think the fix we want here is to rewrite this test to call
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* directly into pixman with the trapezoid of interest, (which will
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* require adding a new way to configure cairo for "testing" which
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* will prevent the hiding of internal library symbols.
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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_set_source_rgb (cr, 1,1,1);
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cairo_paint (cr);
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cairo_set_source_rgb (cr, 0,0,0);
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/* Note that without the clip, this doesn't crash... */
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cairo_new_path (cr);
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cairo_rectangle (cr, 0, 0, width, height);
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cairo_clip (cr);
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cairo_new_path (cr);
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cairo_line_to (cr, 8.0, 8.0);
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cairo_line_to (cr, 312.0, 8.0);
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cairo_line_to (cr, 310.0, 31378756.2666666666);
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cairo_line_to (cr, 10.0, 31378756.2666666666);
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cairo_line_to (cr, 8.0, 8.0);
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cairo_fill (cr);
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return CAIRO_TEST_SUCCESS;
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}
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CAIRO_TEST (big_trap,
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"Test oversize trapezoid with a clip region"
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"\nTest needs to be adjusted to trigger the original bug",
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"trap", /* keywords */
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NULL, /* requirements */
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100, 100,
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NULL, draw)
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