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Diffstat (limited to 'test/big-trap.c')
| -rw-r--r-- | test/big-trap.c | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/test/big-trap.c b/test/big-trap.c deleted file mode 100644 index 5e11237a8..000000000 --- a/test/big-trap.c +++ /dev/null @@ -1,92 +0,0 @@ -/* - * Copyright © 2006 Mozilla Corporation - * - * 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 - * Mozilla Corporation not be used in advertising or publicity pertaining to - * distribution of the software without specific, written prior - * permission. Mozilla Corporation makes no representations about the - * suitability of this software for any purpose. It is provided "as - * is" without express or implied warranty. - * - * MOZILLA CORPORATION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS - * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND - * FITNESS, IN NO EVENT SHALL MOZILLA CORPORATION 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: Vladimir Vukicevic <vladimir@pobox.com> - */ - -#include "cairo-test.h" - -/* This test was originally written to exercise a bug in pixman in - * which it would scribble all over memory when given a particular - * (and bogus) trapezoid. However, a recent change to - * _cairo_fixed_from_double changed the details of the bogus trapezoid - * (it overflows in a different way now), so the bug is being masked. - * - * According to Vladimir, (http://lists.freedesktop.org/archives/cairo/2006-November/008482.html): - * - * Before the change, the two trapezoids that were generated were: - * - * Trap[0]: T: 0x80000000 B: 0x80000003 - * L: [(0x000a0000, 0x80000000) (0x00080000, 0x00080000)] - * R: [(0x01360000, 0x80000000) (0x01380000, 0x00080000)] - * Trap[1]: T: 0x80000003 B: 0x00080000 - * L: [(0x000a0000, 0x80000000) (0x00080000, 0x00080000)] - * R: [(0x01360000, 0x80000000) (0x01380000, 0x00080000)] - * - * After the change, the L/R coordinates are identical for both traps, but - * the top and bottom change: - * - * Trap[0]: t: 0x80000000 b: 0xfda80003 - * l: [(0x000a0000, 0x80000000) (0x00080000, 0x00080000)] - * r: [(0x01360000, 0x80000000) (0x01380000, 0x00080000)] - * Trap[1]: t: 0xfda80003 b: 0x00080000 - * l: [(0x000a0000, 0x80000000) (0x00080000, 0x00080000)] - * r: [(0x01360000, 0x80000000) (0x01380000, 0x00080000)] - * - * I think the fix we want here is to rewrite this test to call - * directly into pixman with the trapezoid of interest, (which will - * require adding a new way to configure cairo for "testing" which - * will prevent the hiding of internal library symbols. - */ - -static cairo_test_status_t -draw (cairo_t *cr, int width, int height) -{ - cairo_set_source_rgb (cr, 1,1,1); - cairo_paint (cr); - - cairo_set_source_rgb (cr, 0,0,0); - - /* Note that without the clip, this doesn't crash... */ - cairo_new_path (cr); - cairo_rectangle (cr, 0, 0, width, height); - cairo_clip (cr); - - cairo_new_path (cr); - cairo_line_to (cr, 8.0, 8.0); - cairo_line_to (cr, 312.0, 8.0); - cairo_line_to (cr, 310.0, 31378756.2666666666); - cairo_line_to (cr, 10.0, 31378756.2666666666); - cairo_line_to (cr, 8.0, 8.0); - cairo_fill (cr); - - return CAIRO_TEST_SUCCESS; -} - -/* XFAIL: range overflow of fixed-point */ -CAIRO_TEST (big_trap, - "Test oversize trapezoid with a clip region" - "\nTest needs to be adjusted to trigger the original bug", - "trap", /* keywords */ - NULL, /* requirements */ - 100, 100, - NULL, draw) |