drawinglayer/source/primitive2d/svggradientprimitive2d.cxx | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
New commits:
commit aa5d7477e8e1e4bcd0e56496e745c3dc3b05c369
Author: Armin Le Grand <armin.le.gr...@cib.de>
Date: Wed Jun 6 13:28:09 2018 +0200
tdf#117949 Use small overlap for SVG gradient representation
Change-Id: Idd55df31aa87cc40dbb15001479cdc79e918ac19
Reviewed-on: https://gerrit.libreoffice.org/55376
Tested-by: Jenkins <c...@libreoffice.org>
Reviewed-by: Armin Le Grand <armin.le.gr...@cib.de>
diff --git a/drawinglayer/source/primitive2d/svggradientprimitive2d.cxx
b/drawinglayer/source/primitive2d/svggradientprimitive2d.cxx
index 0197b4199fb2..12eef36c16ac 100644
--- a/drawinglayer/source/primitive2d/svggradientprimitive2d.cxx
+++ b/drawinglayer/source/primitive2d/svggradientprimitive2d.cxx
@@ -915,14 +915,21 @@ namespace drawinglayer
// use color distance and discrete lengths to calculate step
count
const sal_uInt32
nSteps(calculateStepsForSvgGradient(getColorA(), getColorB(), fDelta,
fDiscreteUnit));
+ // tdf#117949 Use a small amount of discrete overlap at the
edges. Usually this
+ // should be exactly 0.0 and 1.0, but there were cases when
this gets clipped
+ // against the mask polygon which got numerically problematic.
+ // This change is unnecessary in that respect, but avoids that
numerical havoc
+ // by at the same time doing no real harm AFAIK
+ // TTTT: Remove again when clipping is fixed (!)
+
// prepare polygon in needed width at start position (with
discrete overlap)
const basegfx::B2DPolygon aPolygon(
basegfx::utils::createPolygonFromRect(
basegfx::B2DRange(
getOffsetA() - fDiscreteUnit,
- 0.0,
+ -0.0001, // TTTT -> should be 0.0, see comment
above
getOffsetA() + (fDelta / nSteps) + fDiscreteUnit,
- 1.0)));
+ 1.0001))); // TTTT -> should be 1.0, see comment
above
// prepare loop (inside to outside, [0.0 .. 1.0[)
double fUnitScale(0.0);
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