From 6f1cbda681545fa3667b107830ebea804b08c98c Mon Sep 17 00:00:00 2001 From: Miklos Vajna Date: Thu, 6 Aug 2020 12:31:35 +0200 Subject: tdf#134183 PPTX: improve import of transparency in multi-step gradients Impress core only support a single step, improve the conversion from multi-step to single step to take transparency into account explicitly. Once we select the widest segment, look backwards and forward if there are other next segments which have the same RGB color, just different transparency and include them. This helps in general, because in case a 0% or 100% transparency is mishandled, that's very visible. (cherry picked from commit 73993fdb5d4b507694cd0edf80887d19f7e2bf9a) Change-Id: I11d593c01a6a4b16149ce74c1408c2a39895e941 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/100283 Tested-by: Jenkins Reviewed-by: Xisco Fauli --- .../unit/data/gradient-multistep-transparency.pptx | Bin 0 -> 34042 bytes oox/qa/unit/drawingml.cxx | 27 ++++++++++++++++ oox/source/drawingml/fillproperties.cxx | 36 +++++++++++++++++++-- 3 files changed, 60 insertions(+), 3 deletions(-) create mode 100644 oox/qa/unit/data/gradient-multistep-transparency.pptx diff --git a/oox/qa/unit/data/gradient-multistep-transparency.pptx b/oox/qa/unit/data/gradient-multistep-transparency.pptx new file mode 100644 index 000000000000..83946c71b403 Binary files /dev/null and b/oox/qa/unit/data/gradient-multistep-transparency.pptx differ diff --git a/oox/qa/unit/drawingml.cxx b/oox/qa/unit/drawingml.cxx index ee5ae764af70..d88f91797304 100644 --- a/oox/qa/unit/drawingml.cxx +++ b/oox/qa/unit/drawingml.cxx @@ -10,7 +10,9 @@ #include #include +#include #include +#include #include #include #include @@ -199,6 +201,31 @@ CPPUNIT_TEST_FIXTURE(OoxDrawingmlTest, testChartDataLabelCharColor) CPPUNIT_ASSERT_EQUAL(static_cast(0xffffff), nCharColor); } +CPPUNIT_TEST_FIXTURE(OoxDrawingmlTest, testGradientMultiStepTransparency) +{ + // Load a document with a multi-step gradient. + OUString aURL + = m_directories.getURLFromSrc(DATA_DIRECTORY) + "gradient-multistep-transparency.pptx"; + load(aURL); + + // Check the end transparency of the gradient. + uno::Reference xDrawPagesSupplier(getComponent(), uno::UNO_QUERY); + uno::Reference xDrawPage(xDrawPagesSupplier->getDrawPages()->getByIndex(0), + uno::UNO_QUERY); + uno::Reference xShape(xDrawPage->getByIndex(1), uno::UNO_QUERY); + CPPUNIT_ASSERT_EQUAL(OUString("Rectangle 4"), xShape->getName()); + uno::Reference xShapeProps(xShape, uno::UNO_QUERY); + awt::Gradient aTransparence; + xShapeProps->getPropertyValue("FillTransparenceGradient") >>= aTransparence; + + // Without the accompanying fix in place, this test would have failed with: + // - Expected: 16777215 (0xffffff) + // - Actual : 3487029 (0x353535) + // i.e. the end transparency was not 100%, but was 21%, leading to an unexpected visible line on + // the right of this shape. + CPPUNIT_ASSERT_EQUAL(static_cast(0xffffff), aTransparence.EndColor); +} + CPPUNIT_PLUGIN_IMPLEMENT(); /* vim:set shiftwidth=4 softtabstop=4 expandtab: */ diff --git a/oox/source/drawingml/fillproperties.cxx b/oox/source/drawingml/fillproperties.cxx index f203e9e2823e..7082cbee0186 100644 --- a/oox/source/drawingml/fillproperties.cxx +++ b/oox/source/drawingml/fillproperties.cxx @@ -512,21 +512,51 @@ void FillProperties::pushToPropMap( ShapePropertyMap& rPropMap, // convert DrawingML angle (in 1/60000 degrees) to API angle (in 1/10 degrees) aGradient.Angle = static_cast< sal_Int16 >( (8100 - (nDmlAngle / (PER_DEGREE / 10))) % 3600 ); Color aStartColor, aEndColor; + + // Try to grow the widest segment backwards: if a previous segment has the same + // color, just different transparency, include it. + while (aWidestSegmentStart != aGradientStops.begin()) + { + auto it = std::prev(aWidestSegmentStart); + if (it->second.getColor(rGraphicHelper, nPhClr) + != aWidestSegmentStart->second.getColor(rGraphicHelper, nPhClr)) + { + break; + } + + aWidestSegmentStart = it; + } + + auto aWidestSegmentEnd = std::next(aWidestSegmentStart); + // Try to grow the widest segment forward: if a neext segment has the same + // color, just different transparency, include it. + while (aWidestSegmentEnd != std::prev(aGradientStops.end())) + { + auto it = std::next(aWidestSegmentEnd); + if (it->second.getColor(rGraphicHelper, nPhClr) + != aWidestSegmentEnd->second.getColor(rGraphicHelper, nPhClr)) + { + break; + } + + aWidestSegmentEnd = it; + } + if( bSymmetric ) { - aStartColor = std::next(aWidestSegmentStart)->second; + aStartColor = aWidestSegmentEnd->second; aEndColor = aWidestSegmentStart->second; nBorder *= 2; } else if( bSwap ) { - aStartColor = std::next(aWidestSegmentStart)->second; + aStartColor = aWidestSegmentEnd->second; aEndColor = aWidestSegmentStart->second; } else { aStartColor = aWidestSegmentStart->second; - aEndColor = std::next(aWidestSegmentStart)->second; + aEndColor = aWidestSegmentEnd->second; } SAL_INFO("oox.drawingml.gradient", "start color: " << std::hex << sal_Int32(aStartColor.getColor( rGraphicHelper, nPhClr )) << std::dec << -- cgit