3rdparty/ext_lcms2/0001-Fix-Krita-segfault.patch

0001 From aa7f240da8dc27a0bb082462889cca9026bf2b27 Mon Sep 17 00:00:00 2001
0002 From: Marti Maria <marti.maria@littlecms.com>
0003 Date: Thu, 20 Oct 2022 15:24:27 +0200
0004 Subject: [PATCH 1/2] Fix Krita segfault
0005
0006 _cmsQuickFloor() fails when numbers are too close, on fourth decimals, floor of 47.9993 was taken as 48 instead of 47 and this was enough to generate a negative rest and create a segfault. Math is sometimes complex.
0007 ---
0008  plugins/fast_float/src/fast_float_tethra.c | 6 +++---
0009  1 file changed, 3 insertions(+), 3 deletions(-)
0010
0011 diff --git a/plugins/fast_float/src/fast_float_tethra.c b/plugins/fast_float/src/fast_float_tethra.c
0012 index 64e011a..6c49774 100644
0013 --- a/plugins/fast_float/src/fast_float_tethra.c
0014 +++ b/plugins/fast_float/src/fast_float_tethra.c
0015 @@ -134,9 +134,9 @@ void FloatCLUTEval(struct _cmstransform_struct* CMMcargo,
0016              py = g * p->Domain[1];
0017              pz = b * p->Domain[2];
0018
0019 -            x0 = _cmsQuickFloor(px); rx = (px - (cmsFloat32Number)x0);
0020 -            y0 = _cmsQuickFloor(py); ry = (py - (cmsFloat32Number)y0);
0021 -            z0 = _cmsQuickFloor(pz); rz = (pz - (cmsFloat32Number)z0);
0022 +            x0 = (int) floorf(px); rx = (px - (cmsFloat32Number)x0);
0023 +            y0 = (int) floorf(py); ry = (py - (cmsFloat32Number)y0);
0024 +            z0 = (int) floorf(pz); rz = (pz - (cmsFloat32Number)z0);
0025
0026
0027              X0 = p->opta[2] * x0;
0028 --
0029 2.37.1.windows.1
0030