MCGR: tdf#155479 repair gradient SVG export for MCGR

Unfortunately SVG export is based on metafiles and thus there
is (in principle) no way to get the BGradient/ColorStop/MCGR
data transfered as needed. For that, using UNO API to read the
model or using B2DPrimitives would help - as is better for the
export respectively.

Since there is not the time to re-design SVG export I added
this 'compromize' as a fix. It gets the needed data transported
over the metafile (that part is the compromize). It then
exports the MCGR data to SVG (at least - as was already there -
if it's a linear/axial gradient). This happens now with all
Gradient Stops when there is a MCGR gradient. That part is/will
hopefully be re-usable if SVG export  gets redesigned.

I also added a handling for StepCount feature, so when used (in
LO, others do not have that) 'hard' color stops get generated
to make the gradient look identical for SVG export.

Had to make adding of that extra-information in metafiles
dependent on exporting really to SVG. There are 51 cases which
use 'MetaActionType::COMMENT' which would potentially have
to be adapted.

Also added code to solve the problem for TransparencePrimitive2D
at VclMetafileProcessor2D::processTransparencePrimitive2D. This
will now - also only for SVG export - directly create the needed
MetaFloatTransparentAction and add additional MCGR information.
This will be used on SVG export to write a 'Mask' as was done
before. This is now capable of creating fill MCGR-Masks in
the sense that any number of TransparencyStops will be supported.

Change-Id: Ic6d022714eae96b8fbc09e60652851ac5799b757
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/152623
Tested-by: Jenkins
Reviewed-by: Armin Le Grand <Armin.Le.Grand@me.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/vcl/source/control/fmtfield.cxx b/vcl/source/control/fmtfield.cxx
index 69497dec2c1b..fc7bdfee6f58 100644
--- a/vcl/source/control/fmtfield.cxx
+++ b/vcl/source/control/fmtfield.cxx
@@ -910,7 +910,7 @@ namespace
             m_rSpinButton.SpinField::SetText(rText, rSel);
         }
 
-        virtual void SetEntryTextColor(const Color* pColor) override
+        virtual void SetEntryTextColor(const ::Color* pColor) override
         {
             if (pColor)
                 m_rSpinButton.SetControlForeground(*pColor);