svx/source/svdraw/svdetc.cxx | 42 +++++++++++++++++++++++++++++++++++-------
1 file changed, 35 insertions(+), 7 deletions(-)
New commits:
commit f8c87d617fc684e8e204a17cbd119c179a7e86e3
Author: Pranam Lashkari <lpra...@collabora.com>
AuthorDate: Fri Oct 25 10:56:37 2024 +0530
Commit: Caolán McNamara <caolan.mcnam...@collabora.com>
CommitDate: Sun Oct 27 13:34:00 2024 +0100
svx: calculate fill color with transperency
calculate absoulutly visible color based on transperency against the doc
background
TODO:
calculate this color based on the object in the background to increase
visibility more
Change-Id: I56076c29f10c58c6ee13e1358da92a4685ea01e5
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/175621
Tested-by: Jenkins CollaboraOffice <jenkinscollaboraoff...@gmail.com>
Tested-by: Caolán McNamara <caolan.mcnam...@collabora.com>
Reviewed-by: Caolán McNamara <caolan.mcnam...@collabora.com>
diff --git a/svx/source/svdraw/svdetc.cxx b/svx/source/svdraw/svdetc.cxx
index e5f99a8f8f01..6ae1eb3b1e5c 100644
--- a/svx/source/svdraw/svdetc.cxx
+++ b/svx/source/svdraw/svdetc.cxx
@@ -37,6 +37,7 @@
#include <svx/xbtmpit.hxx>
#include <svx/xflgrit.hxx>
#include <svx/svdoole2.hxx>
+#include <svx/xfltrit.hxx>
#include <svl/itempool.hxx>
#include <unotools/configmgr.hxx>
#include <unotools/localedatawrapper.hxx>
@@ -240,12 +241,13 @@ bool OLEObjCache::UnloadObj(SdrOle2Obj& rObj)
std::optional<Color> GetDraftFillColor(const SfxItemSet& rSet)
{
drawing::FillStyle eFill=rSet.Get(XATTR_FILLSTYLE).GetValue();
-
+ Color aResult;
switch(eFill)
{
case drawing::FillStyle_SOLID:
{
- return rSet.Get(XATTR_FILLCOLOR).GetColorValue();
+ aResult = rSet.Get(XATTR_FILLCOLOR).GetColorValue();
+ break;
}
case drawing::FillStyle_HATCH:
{
@@ -260,14 +262,16 @@ std::optional<Color> GetDraftFillColor(const SfxItemSet&
rSet)
}
const basegfx::BColor
aAverageColor(basegfx::average(aCol1.getBColor(), aCol2.getBColor()));
- return Color(aAverageColor);
+ aResult = Color(aAverageColor);
+ break;
}
case drawing::FillStyle_GRADIENT: {
const basegfx::BGradient&
rGrad=rSet.Get(XATTR_FILLGRADIENT).GetGradientValue();
Color aCol1(Color(rGrad.GetColorStops().front().getStopColor()));
Color aCol2(Color(rGrad.GetColorStops().back().getStopColor()));
const basegfx::BColor
aAverageColor(basegfx::average(aCol1.getBColor(), aCol2.getBColor()));
- return Color(aAverageColor);
+ aResult = Color(aAverageColor);
+ break;
}
case drawing::FillStyle_BITMAP:
{
@@ -307,14 +311,38 @@ std::optional<Color> GetDraftFillColor(const SfxItemSet&
rSet)
nGn /= nCount;
nBl /= nCount;
- return Color(sal_uInt8(nRt), sal_uInt8(nGn), sal_uInt8(nBl));
+ aResult = Color(sal_uInt8(nRt), sal_uInt8(nGn),
sal_uInt8(nBl));
}
break;
}
- default: break;
+ default:
+ return {};
}
- return {};
+ sal_uInt16 nTransparencyPercentage =
rSet.Get(XATTR_FILLTRANSPARENCE).GetValue();
+ if (!nTransparencyPercentage)
+ return aResult;
+
+ auto nTransparency = nTransparencyPercentage / 100.0;
+ auto nOpacity = 1 - nTransparency;
+
+ svtools::ColorConfig aColorConfig;
+ Color aBackground(aColorConfig.GetColorValue(svtools::DOCCOLOR).nColor);
+
+ // https://en.wikipedia.org/wiki/Alpha_compositing
+ // We are here calculating transperency fill color against background with
+ // To put it is simple words with example
+ // I.E: fill is Red (FF0000) and background is pure white (FFFFFF)
+ // If we add 50% transperency to fill color will look like Pink(ff7777)
+
+ // TODO: calculate this colors based on object in background and not just
the doc color
+ aResult.SetRed(
+ std::min(aResult.GetRed() * nOpacity + aBackground.GetRed() *
nTransparency, 255.0));
+ aResult.SetGreen(
+ std::min(aResult.GetGreen() * nOpacity + aBackground.GetGreen() *
nTransparency, 255.0));
+ aResult.SetBlue(
+ std::min(aResult.GetBlue() * nOpacity + aBackground.GetBlue() *
nTransparency, 255.0));
+ return aResult;
}
std::unique_ptr<SdrOutliner> SdrMakeOutliner(OutlinerMode nOutlinerMode,
SdrModel& rModel)
