include/oox/export/drawingml.hxx | 1 oox/source/export/drawingml.cxx | 115 +++++++++++++++++++++++++++++++-------- 2 files changed, 93 insertions(+), 23 deletions(-)
New commits: commit dbbe5d0cd721a815df5e4cbf3215f291a423f2b1 Author: Armin Le Grand (allotropia) <armin.le.grand.ext...@allotropia.de> AuthorDate: Fri Apr 14 16:29:18 2023 +0200 Commit: Armin Le Grand <armin.le.gr...@me.com> CommitDate: Mon Apr 17 16:10:48 2023 +0200 MCGR: 1st corrections to gradient export, transparency Changed Alpha export from using Red component of used BColor too use luminance, that will be more safe if we evtl use same gradients for this in the future. Added evtl. needed inversion for gradient exports, also emulation of our 'axial' type. Change-Id: I245959bf1602174f978848e1a02444b4b105f896 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/150416 Tested-by: Jenkins Reviewed-by: Armin Le Grand <armin.le.gr...@me.com> diff --git a/include/oox/export/drawingml.hxx b/include/oox/export/drawingml.hxx index bfab16f12aff..4bd3802a7820 100644 --- a/include/oox/export/drawingml.hxx +++ b/include/oox/export/drawingml.hxx @@ -237,6 +237,7 @@ public: void WriteColor( const ::Color nColor, const css::uno::Sequence< css::beans::PropertyValue >& aTransformations, sal_Int32 nAlpha = MAX_PERCENT ); void WriteColorTransformations( const css::uno::Sequence< css::beans::PropertyValue >& aTransformations, sal_Int32 nAlpha = MAX_PERCENT ); void WriteGradientStop(sal_uInt16 nStop, ::Color nColor, sal_Int32 nAlpha = MAX_PERCENT); + void WriteGradientStop2(double fOffset, const basegfx::BColor& rColor, const basegfx::BColor& rAlpha); void WriteLineArrow( const css::uno::Reference< css::beans::XPropertySet >& rXPropSet, bool bLineStart ); void WriteConnectorConnections( sal_Int32 nStartGlueId, sal_Int32 nEndGlueId, sal_Int32 nStartID, sal_Int32 nEndID ); diff --git a/oox/source/export/drawingml.cxx b/oox/source/export/drawingml.cxx index d02890375514..58b2b1fbb2a7 100644 --- a/oox/source/export/drawingml.cxx +++ b/oox/source/export/drawingml.cxx @@ -657,6 +657,15 @@ bool DrawingML::WriteSchemeColor(OUString const& rPropertyName, const uno::Refer return true; } +void DrawingML::WriteGradientStop2(double fOffset, const basegfx::BColor& rColor, const basegfx::BColor& rAlpha) +{ + mpFS->startElementNS(XML_a, XML_gs, XML_pos, OString::number(static_cast<sal_uInt32>(fOffset * 100000))); + WriteColor( + ::Color(rColor), + static_cast<sal_Int32>((1.0 - rAlpha.luminance()) * oox::drawingml::MAX_PERCENT)); + mpFS->endElementNS( XML_a, XML_gs ); +} + void DrawingML::WriteGradientStop(sal_uInt16 nStop, ::Color nColor, sal_Int32 nAlpha) { mpFS->startElementNS(XML_a, XML_gs, XML_pos, OString::number(nStop * 1000)); @@ -874,35 +883,98 @@ void DrawingML::WriteGradientFill2( // method (at import time) will be exported again basegfx::utils::synchronizeColorStops(aColorStops, aAlphaStops, aSingleColor, aSingleAlpha); - if (aColorStops.size() == aAlphaStops.size()) + if (aColorStops.size() != aAlphaStops.size()) { - // export GradientStops (with alpha) - mpFS->startElementNS(XML_a, XML_gsLst); + // this is an error - synchronizeColorStops above *has* to create that + // state, see description there (!) + assert(false && "oox::WriteGradientFill: non-synchronized gradients (!)"); + return; + } - basegfx::ColorStops::const_iterator aCurrColor(aColorStops.begin()); - basegfx::ColorStops::const_iterator aCurrAlpha(aAlphaStops.begin()); + bool bRadialOrEllipticalOrRectOrSquare(false); + bool bLinear(false); + bool bAxial(false); - while (aCurrColor != aColorStops.end() && aCurrAlpha != aAlphaStops.end()) + switch (aGradient.Style) + { + case awt::GradientStyle_LINEAR: + { + // remember being linear, nothing else to be done + bLinear = true; + break; + } + case awt::GradientStyle_AXIAL: { - WriteGradientStop( - static_cast<sal_uInt16>(aCurrColor->getStopOffset() * 100.0), - ::Color(aCurrColor->getStopColor()), - sal_Int32(::Color(aCurrAlpha->getStopColor()))); - aCurrColor++; - aCurrAlpha++; + // we need to 'double' the gradient to make it appear as what we call + // 'axial', but also scale and mirror in doing so + basegfx::ColorStops aNewColorStops; + basegfx::ColorStops aNewAlphaStops; + + // add mirrored gadients, scaled to [0.0 .. 0.5] + basegfx::ColorStops::const_reverse_iterator aRevCurrColor(aColorStops.rbegin()); + basegfx::ColorStops::const_reverse_iterator aRevCurrAlpha(aAlphaStops.rbegin()); + + while (aRevCurrColor != aColorStops.rend() && aRevCurrAlpha != aAlphaStops.rend()) + { + aNewColorStops.emplace_back((1.0 - aRevCurrColor->getStopOffset()) * 0.5, aRevCurrColor->getStopColor()); + aNewAlphaStops.emplace_back((1.0 - aRevCurrAlpha->getStopOffset()) * 0.5, aRevCurrAlpha->getStopColor()); + aRevCurrColor++; + aRevCurrAlpha++; + } + + // add non-mirrored gradients, translated and scaled to [0.5 .. 1.0] + basegfx::ColorStops::const_iterator aCurrColor(aColorStops.begin()); + basegfx::ColorStops::const_iterator aCurrAlpha(aAlphaStops.begin()); + + while (aCurrColor != aColorStops.end() && aCurrAlpha != aAlphaStops.end()) + { + aNewColorStops.emplace_back((aCurrColor->getStopOffset() * 0.5) + 0.5, aCurrColor->getStopColor()); + aNewAlphaStops.emplace_back((aCurrAlpha->getStopOffset() * 0.5) + 0.5, aCurrAlpha->getStopColor()); + aCurrColor++; + aCurrAlpha++; + } + + aColorStops = aNewColorStops; + aAlphaStops = aNewAlphaStops; + + // remember being axial + bAxial = true; + break; } + default: + // case awt::GradientStyle_RADIAL: + // case awt::GradientStyle_ELLIPTICAL: + // case awt::GradientStyle_RECT: + // case awt::GradientStyle_SQUARE: + { + // all these types need the gadiens to be mirrored + basegfx::utils::reverseColorStops(aColorStops); + basegfx::utils::reverseColorStops(aAlphaStops); - mpFS->endElementNS( XML_a, XML_gsLst ); + bRadialOrEllipticalOrRectOrSquare = true; + break; + } } - else + + // export GradientStops (with alpha) + mpFS->startElementNS(XML_a, XML_gsLst); + + basegfx::ColorStops::const_iterator aCurrColor(aColorStops.begin()); + basegfx::ColorStops::const_iterator aCurrAlpha(aAlphaStops.begin()); + + while (aCurrColor != aColorStops.end() && aCurrAlpha != aAlphaStops.end()) { - // this is an error - synchronizeColorStops above *has* to create that - // state, see description there (!) - assert(false && "oox::WriteGradientFill: non-synchronized gradients (!)"); + WriteGradientStop2( + aCurrColor->getStopOffset(), + aCurrColor->getStopColor(), + aCurrAlpha->getStopColor()); + aCurrColor++; + aCurrAlpha++; } - if (awt::GradientStyle_LINEAR == aGradient.Style || - awt::GradientStyle_AXIAL == aGradient.Style) + mpFS->endElementNS( XML_a, XML_gsLst ); + + if (bLinear || bAxial) { // cases where gradient rotation has to be exported mpFS->singleElementNS( @@ -910,10 +982,7 @@ void DrawingML::WriteGradientFill2( OString::number(((3600 - aGradient.Angle + 900) * 6000) % 21600000)); } - if (awt::GradientStyle_RADIAL == aGradient.Style || - awt::GradientStyle_ELLIPTICAL == aGradient.Style || - awt::GradientStyle_RECT == aGradient.Style || - awt::GradientStyle_SQUARE == aGradient.Style) + if (bRadialOrEllipticalOrRectOrSquare) { // cases where gradient path has to be exported const bool bCircle(aGradient.Style == awt::GradientStyle_RADIAL ||