tdf#155852 same method for StepCount in OOXML as in rendering

Rendering of stepped gradients uses a method that doesn't take the
color from a cut point, but before or after respectively. For example,
for StepCount 4, the colors at relative positions 0, 1/3, 2/3 and 1
are used. So sections are 'start color', '1/3 color', '2/3 color' and
'end color'. The output to OOXML now uses the same method. That way
rendering in a produced pptx-file is the same as in the original
odp-file. Since OOXML has nothing similar to StepCount, it is an export
only problem.

A second problem comes from the cuddle with StepCount in Gradient
struct in API and FillStepCount in shape property set. The
draw:gradient-stop-count attribute in ODF belongs to the graphic style
of the shape. The gradient definition itself in the <draw:gradient>
element has nothing about step count. When a file is opened, it can be
that the StepCount component in the Gradient struct still has the
default value 0, but the FillStepCount property has the correct value
of the shape.

The Gradient struct in the API should not have a component StepCount
to be compatible with ODF. But the API is published and changing that
struct is far-reaching in the code. So the fix here is not a general
solution but solves the problem for export to OOXML by reading the
FillStepCount property while exporting.

Change-Id: Ie1cafe6bdda7c4d74b05f279f0d8212ff67ecc92
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/153154
Tested-by: Jenkins
Reviewed-by: Regina Henschel <rb.henschel@t-online.de>

2 files changed, 662 insertions, 0 deletions

diff --git a/oox/qa/unit/data/tdf155852_MCGR_StepCount4.fodp b/oox/qa/unit/data/tdf155852_MCGR_StepCount4.fodp
new file mode 100644
index 000000000000..309cb3b0b1b9
--- /dev/null
+++ b/oox/qa/unit/data/tdf155852_MCGR_StepCount4.fodp
@@ -0,0 +1,637 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
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+ <office:meta><meta:creation-date>2023-06-15T14:04:51.506000000</meta:creation-date><meta:editing-duration>PT7M34S</meta:editing-duration><meta:editing-cycles>3</meta:editing-cycles><meta:generator>B2020/24.2.0.0.alpha0$Windows_X86_64 LibreOffice_project/977878814a3573627026e31edb8a51c8f30c8a0c</meta:generator><meta:initial-creator>Regina Henschel</meta:initial-creator><dc:date>2023-06-15T14:52:02.192000000</dc:date><dc:creator>Regina Henschel</dc:creator><meta:document-statistic meta:object-count="8"/></office:meta>
+ <office:settings>
+  <config:config-item-set config:name="ooo:view-settings">
+   <config:config-item config:name="VisibleAreaTop" config:type="int">-231</config:config-item>
+   <config:config-item config:name="VisibleAreaLeft" config:type="int">-8197</config:config-item>
+   <config:config-item config:name="VisibleAreaWidth" config:type="int">41102</config:config-item>
+   <config:config-item config:name="VisibleAreaHeight" config:type="int">16741</config:config-item>
+   <config:config-item-map-indexed config:name="Views">
+    <config:config-item-map-entry>
+     <config:config-item config:name="ViewId" config:type="string">view1</config:config-item>
+     <config:config-item config:name="GridIsVisible" config:type="boolean">false</config:config-item>
+     <config:config-item config:name="GridIsFront" config:type="boolean">false</config:config-item>
+     <config:config-item config:name="IsSnapToGrid" config:type="boolean">true</config:config-item>
+     <config:config-item config:name="IsSnapToPageMargins" config:type="boolean">true</config:config-item>
+     <config:config-item config:name="IsSnapToSnapLines" config:type="boolean">true</config:config-item>
+     <config:config-item config:name="IsSnapToObjectFrame" config:type="boolean">true</config:config-item>
+     <config:config-item config:name="IsSnapToObjectPoints" config:type="boolean">false</config:config-item>
+     <config:config-item config:name="IsPlusHandlesAlwaysVisible" config:type="boolean">false</config:config-item>
+     <config:config-item config:name="IsFrameDragSingles" config:type="boolean">true</config:config-item>
+     <config:config-item config:name="EliminatePolyPointLimitAngle" config:type="int">1500</config:config-item>
+     <config:config-item config:name="IsEliminatePolyPoints" config:type="boolean">false</config:config-item>
+     <config:config-item config:name="VisibleLayers" config:type="base64Binary">Hw==</config:config-item>
+     <config:config-item config:name="PrintableLayers" config:type="base64Binary">Hw==</config:config-item>
+     <config:config-item config:name="LockedLayers" config:type="base64Binary"/>
+     <config:config-item config:name="NoAttribs" config:type="boolean">false</config:config-item>
+     <config:config-item config:name="NoColors" config:type="boolean">true</config:config-item>
+     <config:config-item config:name="RulerIsVisible" config:type="boolean">false</config:config-item>
+     <config:config-item config:name="PageKind" config:type="short">0</config:config-item>
+     <config:config-item config:name="SelectedPage" config:type="short">0</config:config-item>
+     <config:config-item config:name="IsLayerMode" config:type="boolean">false</config:config-item>
+     <config:config-item config:name="IsDoubleClickTextEdit" config:type="boolean">true</config:config-item>
+     <config:config-item config:name="IsClickChangeRotation" config:type="boolean">true</config:config-item>
+     <config:config-item config:name="SlidesPerRow" config:type="short">4</config:config-item>
+     <config:config-item config:name="EditMode" config:type="int">0</config:config-item>
+     <config:config-item config:name="VisibleAreaTop" config:type="int">-231</config:config-item>
+     <config:config-item config:name="VisibleAreaLeft" config:type="int">-8197</config:config-item>
+     <config:config-item config:name="VisibleAreaWidth" config:type="int">41103</config:config-item>
+     <config:config-item config:name="VisibleAreaHeight" config:type="int">16742</config:config-item>
+     <config:config-item config:name="GridCoarseWidth" config:type="int">2000</config:config-item>
+     <config:config-item config:name="GridCoarseHeight" config:type="int">2000</config:config-item>
+     <config:config-item config:name="GridFineWidth" config:type="int">500</config:config-item>
+     <config:config-item config:name="GridFineHeight" config:type="int">500</config:config-item>
+     <config:config-item config:name="GridSnapWidthXNumerator" config:type="int">2000</config:config-item>
+     <config:config-item config:name="GridSnapWidthXDenominator" config:type="int">4</config:config-item>
+     <config:config-item config:name="GridSnapWidthYNumerator" config:type="int">2000</config:config-item>
+     <config:config-item config:name="GridSnapWidthYDenominator" config:type="int">4</config:config-item>
+     <config:config-item config:name="IsAngleSnapEnabled" config:type="boolean">false</config:config-item>
+     <config:config-item config:name="SnapAngle" config:type="int">1500</config:config-item>
+     <config:config-item config:name="ZoomOnPage" config:type="boolean">true</config:config-item>
+     <config:config-item config:name="AnchoredTextOverflowLegacy" config:type="boolean">false</config:config-item>
+     <config:config-item config:name="LegacySingleLineFontwork" config:type="boolean">false</config:config-item>
+     <config:config-item config:name="ConnectorUseSnapRect" config:type="boolean">false</config:config-item>
+     <config:config-item config:name="IgnoreBreakAfterMultilineField" config:type="boolean">false</config:config-item>
+    </config:config-item-map-entry>
+   </config:config-item-map-indexed>
+  </config:config-item-set>
+  <config:config-item-set config:name="ooo:configuration-settings">
+   <config:config-item config:name="IsPrintBookletBack" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="DefaultTabStop" config:type="int">1250</config:config-item>
+   <config:config-item config:name="PrinterName" config:type="string">EPSON6FC99C (WP-4025 Series)</config:config-item>
+   <config:config-item-map-indexed config:name="ForbiddenCharacters">
+    <config:config-item-map-entry>
+     <config:config-item config:name="Language" config:type="string">de</config:config-item>
+     <config:config-item config:name="Country" config:type="string">DE</config:config-item>
+     <config:config-item config:name="Variant" config:type="string"/>
+     <config:config-item config:name="BeginLine" config:type="string"/>
+     <config:config-item config:name="EndLine" config:type="string"/>
+    </config:config-item-map-entry>
+   </config:config-item-map-indexed>
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+   <config:config-item config:name="PrinterPaperFromSetup" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="IsPrintPageName" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="IsPrintDate" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="BitmapTableURL" config:type="string">$(inst)/share/palette%3B$(user)/config/standard.sob</config:config-item>
+   <config:config-item config:name="IsPrintTime" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="ImagePreferredDPI" config:type="int">0</config:config-item>
+   <config:config-item config:name="CharacterCompressionType" config:type="short">0</config:config-item>
+   <config:config-item config:name="IsPrintHiddenPages" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="IsPrintFitPage" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="IsPrintTilePage" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="SaveThumbnail" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="IsPrintBooklet" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="IsPrintBookletFront" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="PrintQuality" config:type="int">0</config:config-item>
+   <config:config-item config:name="ColorTableURL" config:type="string">$(inst)/share/palette/html.soc</config:config-item>
+   <config:config-item config:name="DashTableURL" config:type="string">$(inst)/share/palette%3B$(user)/config/standard.sod</config:config-item>
+   <config:config-item config:name="LineEndTableURL" config:type="string">$(inst)/share/palette%3B$(user)/config/standard.soe</config:config-item>
+   <config:config-item config:name="HatchTableURL" config:type="string">$(inst)/share/palette%3B$(user)/config/standard.soh</config:config-item>
+   <config:config-item config:name="GradientTableURL" config:type="string">$(inst)/share/palette%3B$(user)/config/standard.sog</config:config-item>
+   <config:config-item config:name="ApplyUserData" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="PageNumberFormat" config:type="int">4</config:config-item>
+   <config:config-item config:name="ParagraphSummation" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="IsKernAsianPunctuation" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="UpdateFromTemplate" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="PrinterIndependentLayout" config:type="string">low-resolution</config:config-item>
+   <config:config-item config:name="LoadReadonly" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="SaveVersionOnClose" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="EmbedFonts" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="EmbedComplexScriptFonts" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="EmbedOnlyUsedFonts" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="EmbedLatinScriptFonts" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="EmbedAsianScriptFonts" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="IsPrintDrawing" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="IsPrintNotes" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="IsPrintHandout" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="IsPrintOutline" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="SlidesPerHandout" config:type="short">6</config:config-item>
+   <config:config-item config:name="HandoutsHorizontal" config:type="boolean">true</config:config-item>
+  </config:config-item-set>
+ </office:settings>
+ <office:scripts>
+  <office:script script:language="ooo:Basic">
+   <ooo:libraries xmlns:ooo="http://openoffice.org/2004/office" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <ooo:library-embedded ooo:name="Standard"/>
+   </ooo:libraries>
+  </office:script>
+ </office:scripts>
+ <office:font-face-decls>
+  <style:font-face style:name="Liberation Sans" svg:font-family="&apos;Liberation Sans&apos;" style:font-family-generic="roman" style:font-pitch="variable"/>
+  <style:font-face style:name="Liberation Serif" svg:font-family="&apos;Liberation Serif&apos;" style:font-family-generic="roman" style:font-pitch="variable"/>
+  <style:font-face style:name="Lucida Sans" svg:font-family="&apos;Lucida Sans&apos;" style:font-family-generic="system" style:font-pitch="variable"/>
+  <style:font-face style:name="Microsoft YaHei" svg:font-family="&apos;Microsoft YaHei&apos;" style:font-family-generic="system" style:font-pitch="variable"/>
+  <style:font-face style:name="Noto Sans" svg:font-family="&apos;Noto Sans&apos;" style:font-family-generic="roman" style:font-pitch="variable"/>
+  <style:font-face style:name="Segoe UI" svg:font-family="&apos;Segoe UI&apos;" style:font-family-generic="system" style:font-pitch="variable"/>
+  <style:font-face style:name="Tahoma" svg:font-family="Tahoma" style:font-family-generic="system" style:font-pitch="variable"/>
+ </office:font-face-decls>
+ <office:styles>
+  <draw:gradient draw:name="Filled" draw:style="linear" draw:start-color="#ffffff" draw:end-color="#cccccc" draw:start-intensity="100%" draw:end-intensity="100%" draw:angle="30deg" draw:border="0%">
+   <loext:gradient-stop svg:offset="0" loext:color-type="rgb" loext:color-value="#ffffff"/>
+   <loext:gradient-stop svg:offset="1" loext:color-type="rgb" loext:color-value="#cccccc"/></draw:gradient>
+  <draw:gradient draw:name="Filled_20_Blue" draw:display-name="Filled Blue" draw:style="linear" draw:start-color="#729fcf" draw:end-color="#355269" draw:start-intensity="100%" draw:end-intensity="100%" draw:angle="30deg" draw:border="0%">
+   <loext:gradient-stop svg:offset="0" loext:color-type="rgb" loext:color-value="#729fcf"/>
+   <loext:gradient-stop svg:offset="1" loext:color-type="rgb" loext:color-value="#355269"/></draw:gradient>
+  <draw:gradient draw:name="Filled_20_Green" draw:display-name="Filled Green" draw:style="linear" draw:start-color="#77bc65" draw:end-color="#127622" draw:start-intensity="100%" draw:end-intensity="100%" draw:angle="30deg" draw:border="0%">
+   <loext:gradient-stop svg:offset="0" loext:color-type="rgb" loext:color-value="#77bc65"/>
+   <loext:gradient-stop svg:offset="1" loext:color-type="rgb" loext:color-value="#127622"/></draw:gradient>
+  <draw:gradient draw:name="Filled_20_Red" draw:display-name="Filled Red" draw:style="linear" draw:start-color="#ff6d6d" draw:end-color="#c9211e" draw:start-intensity="100%" draw:end-intensity="100%" draw:angle="30deg" draw:border="0%">
+   <loext:gradient-stop svg:offset="0" loext:color-type="rgb" loext:color-value="#ff6d6d"/>
+   <loext:gradient-stop svg:offset="1" loext:color-type="rgb" loext:color-value="#c9211e"/></draw:gradient>
+  <draw:gradient draw:name="Filled_20_Yellow" draw:display-name="Filled Yellow" draw:style="linear" draw:start-color="#ffde59" draw:end-color="#b47804" draw:start-intensity="100%" draw:end-intensity="100%" draw:angle="30deg" draw:border="0%">
+   <loext:gradient-stop svg:offset="0" loext:color-type="rgb" loext:color-value="#ffde59"/>
+   <loext:gradient-stop svg:offset="1" loext:color-type="rgb" loext:color-value="#b47804"/></draw:gradient>
+  <draw:gradient draw:name="Gradient_20_2" draw:display-name="Gradient 2" draw:style="linear" draw:start-color="#ff0000" draw:end-color="#00ffff" draw:start-intensity="100%" draw:end-intensity="100%" draw:angle="90deg" draw:border="0%">
+   <loext:gradient-stop svg:offset="0" loext:color-type="rgb" loext:color-value="#ff0000"/>
+   <loext:gradient-stop svg:offset="1" loext:color-type="rgb" loext:color-value="#00ffff"/></draw:gradient>
+  <draw:gradient draw:name="Shapes" draw:style="rectangular" draw:cx="50%" draw:cy="50%" draw:start-color="#cccccc" draw:end-color="#ffffff" draw:start-intensity="100%" draw:end-intensity="100%" draw:angle="0deg" draw:border="0%">
+   <loext:gradient-stop svg:offset="0" loext:color-type="rgb" loext:color-value="#cccccc"/>
+   <loext:gradient-stop svg:offset="1" loext:color-type="rgb" loext:color-value="#ffffff"/></draw:gradient>
+  <draw:marker draw:name="Arrow" svg:viewBox="0 0 20 30" svg:d="M10 0l-10 30h20z"/>
+  <style:default-style style:family="graphic">
+   <style:graphic-properties svg:stroke-color="#3465a4" draw:fill-color="#729fcf" fo:wrap-option="no-wrap" style:writing-mode="lr-tb"/>
+   <style:paragraph-properties style:text-autospace="ideograph-alpha" style:punctuation-wrap="simple" style:line-break="strict" loext:tab-stop-distance="0cm" style:font-independent-line-spacing="false">
+    <style:tab-stops/>
+   </style:paragraph-properties>
+   <style:text-properties style:use-window-font-color="true" loext:opacity="0%" style:font-name="Liberation Serif" fo:font-size="24pt" fo:language="de" fo:country="DE" style:font-name-asian="Segoe UI" style:font-size-asian="24pt" style:language-asian="zh" style:country-asian="CN" style:font-name-complex="Tahoma" style:font-size-complex="24pt" style:language-complex="hi" style:country-complex="IN"/>
+  </style:default-style>
+  <style:style style:name="standard" style:family="graphic">
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+     <text:list-level-style-bullet text:level="1" text:bullet-char="●">
+      <style:list-level-properties text:min-label-width="0.6cm"/>
+      <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+     </text:list-level-style-bullet>
+     <text:list-level-style-bullet text:level="2" text:bullet-char="●">
+      <style:list-level-properties text:space-before="0.6cm" text:min-label-width="0.6cm"/>
+      <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+     </text:list-level-style-bullet>
+     <text:list-level-style-bullet text:level="3" text:bullet-char="●">
+      <style:list-level-properties text:space-before="1.2cm" text:min-label-width="0.6cm"/>
+      <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+     </text:list-level-style-bullet>
+     <text:list-level-style-bullet text:level="4" text:bullet-char="●">
+      <style:list-level-properties text:space-before="1.8cm" text:min-label-width="0.6cm"/>
+      <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+     </text:list-level-style-bullet>
+     <text:list-level-style-bullet text:level="5" text:bullet-char="●">
+      <style:list-level-properties text:space-before="2.4cm" text:min-label-width="0.6cm"/>
+      <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+     </text:list-level-style-bullet>
+     <text:list-level-style-bullet text:level="6" text:bullet-char="●">
+      <style:list-level-properties text:space-before="3cm" text:min-label-width="0.6cm"/>
+      <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+     </text:list-level-style-bullet>
+     <text:list-level-style-bullet text:level="7" text:bullet-char="●">
+      <style:list-level-properties text:space-before="3.6cm" text:min-label-width="0.6cm"/>
+      <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+     </text:list-level-style-bullet>
+     <text:list-level-style-bullet text:level="8" text:bullet-char="●">
+      <style:list-level-properties text:space-before="4.2cm" text:min-label-width="0.6cm"/>
+      <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+     </text:list-level-style-bullet>
+     <text:list-level-style-bullet text:level="9" text:bullet-char="●">
+      <style:list-level-properties text:space-before="4.8cm" text:min-label-width="0.6cm"/>
+      <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+     </text:list-level-style-bullet>
+     <text:list-level-style-bullet text:level="10" text:bullet-char="●">
+      <style:list-level-properties text:space-before="5.4cm" text:min-label-width="0.6cm"/>
+      <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+     </text:list-level-style-bullet>
+    </text:list-style>
+   </style:graphic-properties>
+   <style:paragraph-properties fo:margin-left="0cm" fo:margin-right="0cm" fo:text-align="center" fo:text-indent="0cm"/>
+   <style:text-properties fo:font-variant="normal" fo:text-transform="none" style:use-window-font-color="true" loext:opacity="0%" style:text-outline="false" style:text-line-through-style="none" style:text-line-through-type="none" style:font-name="Liberation Sans" fo:font-family="&apos;Liberation Sans&apos;" style:font-family-generic="roman" style:font-pitch="variable" fo:font-size="32pt" fo:font-style="normal" fo:text-shadow="none" style:text-underline-style="none" fo:font-weight="normal" style:letter-kerning="true" fo:background-color="transparent" style:font-name-asian="Microsoft YaHei" style:font-family-asian="&apos;Microsoft YaHei&apos;" style:font-family-generic-asian="system" style:font-pitch-asian="variable" style:font-size-asian="32pt" style:font-style-asian="normal" style:font-weight-asian="normal" style:font-name-complex="Lucida Sans" style:font-family-complex="&apos;Lucida Sans&apos;" style:font-family-generic-complex="system" style:font-pitch-complex="variable" style:font-size-complex="32pt" style:font-style-complex="normal" style:font-weight-complex="normal" style:text-emphasize="none" style:font-relief="none" style:text-overline-style="none" style:text-overline-color="font-color"/>
+  </style:style>
+  <style:style style:name="Default-title" style:family="presentation">
+   <style:graphic-properties draw:stroke="none" draw:fill="none" draw:textarea-vertical-align="middle">
+    <text:list-style style:name="Default-title">
+     <text:list-level-style-bullet text:level="1" text:bullet-char="●">
+      <style:list-level-properties text:min-label-width="0.6cm"/>
+      <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+     </text:list-level-style-bullet>
+     <text:list-level-style-bullet text:level="2" text:bullet-char="●">
+      <style:list-level-properties text:space-before="0.6cm" text:min-label-width="0.6cm"/>
+      <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+     </text:list-level-style-bullet>
+     <text:list-level-style-bullet text:level="3" text:bullet-char="●">
+      <style:list-level-properties text:space-before="1.2cm" text:min-label-width="0.6cm"/>
+      <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+     </text:list-level-style-bullet>
+     <text:list-level-style-bullet text:level="4" text:bullet-char="●">
+      <style:list-level-properties text:space-before="1.8cm" text:min-label-width="0.6cm"/>
+      <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+     </text:list-level-style-bullet>
+     <text:list-level-style-bullet text:level="5" text:bullet-char="●">
+      <style:list-level-properties text:space-before="2.4cm" text:min-label-width="0.6cm"/>
+      <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+     </text:list-level-style-bullet>
+     <text:list-level-style-bullet text:level="6" text:bullet-char="●">
+      <style:list-level-properties text:space-before="3cm" text:min-label-width="0.6cm"/>
+      <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+     </text:list-level-style-bullet>
+     <text:list-level-style-bullet text:level="7" text:bullet-char="●">
+      <style:list-level-properties text:space-before="3.6cm" text:min-label-width="0.6cm"/>
+      <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+     </text:list-level-style-bullet>
+     <text:list-level-style-bullet text:level="8" text:bullet-char="●">
+      <style:list-level-properties text:space-before="4.2cm" text:min-label-width="0.6cm"/>
+      <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+     </text:list-level-style-bullet>
+     <text:list-level-style-bullet text:level="9" text:bullet-char="●">
+      <style:list-level-properties text:space-before="4.8cm" text:min-label-width="0.6cm"/>
+      <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+     </text:list-level-style-bullet>
+     <text:list-level-style-bullet text:level="10" text:bullet-char="●">
+      <style:list-level-properties text:space-before="5.4cm" text:min-label-width="0.6cm"/>
+      <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+     </text:list-level-style-bullet>
+    </text:list-style>
+   </style:graphic-properties>
+   <style:paragraph-properties fo:text-align="center"/>
+   <style:text-properties fo:font-variant="normal" fo:text-transform="none" style:use-window-font-color="true" loext:opacity="0%" style:text-outline="false" style:text-line-through-style="none" style:text-line-through-type="none" style:font-name="Liberation Sans" fo:font-family="&apos;Liberation Sans&apos;" style:font-family-generic="roman" style:font-pitch="variable" fo:font-size="44.7000007629395pt" fo:font-style="normal" fo:text-shadow="none" style:text-underline-style="none" fo:font-weight="normal" style:letter-kerning="true" fo:background-color="transparent" style:font-name-asian="Microsoft YaHei" style:font-family-asian="&apos;Microsoft YaHei&apos;" style:font-family-generic-asian="system" style:font-pitch-asian="variable" style:font-size-asian="44pt" style:font-style-asian="normal" style:font-weight-asian="normal" style:font-name-complex="Lucida Sans" style:font-family-complex="&apos;Lucida Sans&apos;" style:font-family-generic-complex="system" style:font-pitch-complex="variable" style:font-size-complex="44pt" style:font-style-complex="normal" style:font-weight-complex="normal" style:text-emphasize="none" style:font-relief="none" style:text-overline-style="none" style:text-overline-color="font-color"/>
+  </style:style>
+  <style:presentation-page-layout style:name="AL0T22">
+   <presentation:placeholder presentation:object="handout" svg:x="2.058cm" svg:y="1.743cm" svg:width="23.912cm" svg:height="3.507cm"/>
+  </style:presentation-page-layout>
+  <style:presentation-page-layout style:name="AL1T0">
+   <presentation:placeholder presentation:object="title" svg:x="2.058cm" svg:y="1.743cm" svg:width="23.912cm" svg:height="3.507cm"/>
+   <presentation:placeholder presentation:object="subtitle" svg:x="2.058cm" svg:y="5.838cm" svg:width="23.912cm" svg:height="13.23cm"/>
+  </style:presentation-page-layout>
+ </office:styles>
+ <office:automatic-styles>
+  <style:page-layout style:name="PM0">
+   <style:page-layout-properties fo:margin-top="0cm" fo:margin-bottom="0cm" fo:margin-left="0cm" fo:margin-right="0cm" fo:page-width="21cm" fo:page-height="29.7cm" style:print-orientation="portrait"/>
+  </style:page-layout>
+  <style:page-layout style:name="PM1">
+   <style:page-layout-properties fo:margin-top="0cm" fo:margin-bottom="0cm" fo:margin-left="0cm" fo:margin-right="0cm" fo:page-width="24cm" fo:page-height="16cm" style:print-orientation="landscape"/>
+  </style:page-layout>
+  <style:style style:name="dp1" style:family="drawing-page">
+   <style:drawing-page-properties draw:background-size="border" draw:fill="none"/>
+  </style:style>
+  <style:style style:name="dp2" style:family="drawing-page">
+   <style:drawing-page-properties presentation:display-header="true" presentation:display-footer="true" presentation:display-page-number="false" presentation:display-date-time="true"/>
+  </style:style>
+  <style:style style:name="dp3" style:family="drawing-page">
+   <style:drawing-page-properties presentation:background-visible="true" presentation:background-objects-visible="true" presentation:display-footer="true" presentation:display-page-number="false" presentation:display-date-time="true"/>
+  </style:style>
+  <style:style style:name="gr1" style:family="graphic" style:parent-style-name="standard">
+   <style:graphic-properties draw:stroke="solid" svg:stroke-color="#0c5201" draw:fill="gradient" draw:fill-color="#18a303" draw:fill-gradient-name="Gradient_20_2" draw:gradient-step-count="4" draw:textarea-horizontal-align="justify" draw:textarea-vertical-align="middle" draw:auto-grow-height="false" fo:min-height="3.25cm" fo:min-width="23.5cm">
+    <loext:fill-complex-color loext:theme-type="accent1" loext:color-type="theme"/>
+   </style:graphic-properties>
+  </style:style>
+  <style:style style:name="gr2" style:family="graphic">
+   <style:graphic-properties style:protect="size"/>
+  </style:style>
+  <style:style style:name="pr1" style:family="presentation" style:parent-style-name="Default-notes">
+   <style:graphic-properties draw:fill-color="#ffffff" draw:auto-grow-height="true" fo:min-height="13.364cm"/>
+   <style:paragraph-properties style:writing-mode="lr-tb"/>
+  </style:style>
+  <style:style style:name="P1" style:family="paragraph">
+   <loext:graphic-properties draw:fill="gradient" draw:fill-color="#18a303" draw:fill-gradient-name="Gradient_20_2" draw:gradient-step-count="4"/>
+   <style:paragraph-properties fo:text-align="center"/>
+  </style:style>
+  <style:style style:name="P2" style:family="paragraph">
+   <loext:graphic-properties draw:fill-color="#ffffff"/>
+  </style:style>
+  <text:list-style style:name="L1">
+   <text:list-level-style-bullet text:level="1" text:bullet-char="●">
+    <style:list-level-properties text:min-label-width="0.6cm"/>
+    <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+   </text:list-level-style-bullet>
+   <text:list-level-style-bullet text:level="2" text:bullet-char="●">
+    <style:list-level-properties text:space-before="0.6cm" text:min-label-width="0.6cm"/>
+    <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+   </text:list-level-style-bullet>
+   <text:list-level-style-bullet text:level="3" text:bullet-char="●">
+    <style:list-level-properties text:space-before="1.2cm" text:min-label-width="0.6cm"/>
+    <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+   </text:list-level-style-bullet>
+   <text:list-level-style-bullet text:level="4" text:bullet-char="●">
+    <style:list-level-properties text:space-before="1.8cm" text:min-label-width="0.6cm"/>
+    <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+   </text:list-level-style-bullet>
+   <text:list-level-style-bullet text:level="5" text:bullet-char="●">
+    <style:list-level-properties text:space-before="2.4cm" text:min-label-width="0.6cm"/>
+    <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+   </text:list-level-style-bullet>
+   <text:list-level-style-bullet text:level="6" text:bullet-char="●">
+    <style:list-level-properties text:space-before="3cm" text:min-label-width="0.6cm"/>
+    <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+   </text:list-level-style-bullet>
+   <text:list-level-style-bullet text:level="7" text:bullet-char="●">
+    <style:list-level-properties text:space-before="3.6cm" text:min-label-width="0.6cm"/>
+    <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+   </text:list-level-style-bullet>
+   <text:list-level-style-bullet text:level="8" text:bullet-char="●">
+    <style:list-level-properties text:space-before="4.2cm" text:min-label-width="0.6cm"/>
+    <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+   </text:list-level-style-bullet>
+   <text:list-level-style-bullet text:level="9" text:bullet-char="●">
+    <style:list-level-properties text:space-before="4.8cm" text:min-label-width="0.6cm"/>
+    <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+   </text:list-level-style-bullet>
+   <text:list-level-style-bullet text:level="10" text:bullet-char="●">
+    <style:list-level-properties text:space-before="5.4cm" text:min-label-width="0.6cm"/>
+    <style:text-properties fo:font-family="OpenSymbol" style:use-window-font-color="true" fo:font-size="45%"/>
+   </text:list-level-style-bullet>
+  </text:list-style>
+ </office:automatic-styles>
+ <office:master-styles>
+  <draw:layer-set>
+   <draw:layer draw:name="layout"/>
+   <draw:layer draw:name="background"/>
+   <draw:layer draw:name="backgroundobjects"/>
+   <draw:layer draw:name="controls"/>
+   <draw:layer draw:name="measurelines"/>
+  </draw:layer-set>
+  <style:handout-master presentation:presentation-page-layout-name="AL0T22" style:page-layout-name="PM0" draw:style-name="dp2">
+   <draw:page-thumbnail draw:layer="backgroundobjects" svg:width="18.999cm" svg:height="12.665cm" svg:x="1cm" svg:y="8.517cm"/>
+  </style:handout-master>
+  <style:master-page style:name="Default" style:page-layout-name="PM1" draw:style-name="dp1">
+   <loext:theme loext:name="Office Theme">
+    <loext:theme-colors loext:name="LibreOffice">
+     <loext:color loext:name="dark1" loext:color="#000000"/>
+     <loext:color loext:name="light1" loext:color="#ffffff"/>
+     <loext:color loext:name="dark2" loext:color="#000000"/>
+     <loext:color loext:name="light2" loext:color="#ffffff"/>
+     <loext:color loext:name="accent1" loext:color="#18a303"/>
+     <loext:color loext:name="accent2" loext:color="#0369a3"/>
+     <loext:color loext:name="accent3" loext:color="#a33e03"/>
+     <loext:color loext:name="accent4" loext:color="#8e03a3"/>
+     <loext:color loext:name="accent5" loext:color="#c99c00"/>
+     <loext:color loext:name="accent6" loext:color="#c9211e"/>
+     <loext:color loext:name="hyperlink" loext:color="#0000ee"/>
+     <loext:color loext:name="followed-hyperlink" loext:color="#551a8b"/>
+    </loext:theme-colors>
+   </loext:theme>
+   <draw:frame presentation:style-name="Default-title" draw:layer="backgroundobjects" svg:width="21.599cm" svg:height="2.671cm" svg:x="1.2cm" svg:y="0.637cm" presentation:class="title" presentation:placeholder="true">
+    <draw:text-box/>
+   </draw:frame>
+   <draw:frame presentation:style-name="Default-outline1" draw:layer="backgroundobjects" svg:width="21.599cm" svg:height="9.279cm" svg:x="1.2cm" svg:y="3.743cm" presentation:class="outline" presentation:placeholder="true">
+    <draw:text-box/>
+   </draw:frame>
+   <presentation:notes style:page-layout-name="PM0">
+    <draw:page-thumbnail presentation:style-name="Default-title" draw:layer="backgroundobjects" svg:width="19.798cm" svg:height="11.136cm" svg:x="0.6cm" svg:y="2.257cm" presentation:class="page"/>
+    <draw:frame presentation:style-name="Default-notes" draw:layer="backgroundobjects" svg:width="16.799cm" svg:height="13.364cm" svg:x="2.1cm" svg:y="14.107cm" presentation:class="notes" presentation:placeholder="true">
+     <draw:text-box/>
+    </draw:frame>
+   </presentation:notes>
+  </style:master-page>
+ </office:master-styles>
+ <office:body>
+  <office:presentation>
+   <draw:page draw:name="page1" draw:style-name="dp3" draw:master-page-name="Default" presentation:presentation-page-layout-name="AL1T0">
+    <draw:custom-shape draw:style-name="gr1" draw:text-style-name="P1" draw:layer="layout" svg:width="24cm" svg:height="3.5cm" svg:x="0cm" svg:y="2cm">
+     <text:p/>
+     <draw:enhanced-geometry svg:viewBox="0 0 21600 21600" draw:type="rectangle" draw:enhanced-path="M 0 0 L 21600 0 21600 21600 0 21600 0 0 Z N"/>
+    </draw:custom-shape>
+    <presentation:notes draw:style-name="dp2">
+     <draw:page-thumbnail draw:style-name="gr2" draw:layer="layout" svg:width="19.798cm" svg:height="11.136cm" svg:x="0.6cm" svg:y="2.257cm" draw:page-number="1" presentation:class="page"/>
+     <draw:frame presentation:style-name="pr1" draw:text-style-name="P2" draw:layer="layout" svg:width="16.799cm" svg:height="13.364cm" svg:x="2.1cm" svg:y="14.107cm" presentation:class="notes" presentation:placeholder="true">
+      <draw:text-box/>
+     </draw:frame>
+    </presentation:notes>
+   </draw:page>
+   <presentation:settings presentation:mouse-visible="false"/>
+  </office:presentation>
+ </office:body>
+</office:document>
\ No newline at end of file
diff --git a/oox/qa/unit/mcgr.cxx b/oox/qa/unit/mcgr.cxx
index e64c8604b7c5..aa7208a32a62 100644
--- a/oox/qa/unit/mcgr.cxx
+++ b/oox/qa/unit/mcgr.cxx
@@ -76,6 +76,31 @@ CPPUNIT_TEST_FIXTURE(TestMCGR, testTdf155825_SourcOffsetRangeDifferent)
     // assert(false && "oox::WriteGradientFill: non-synchronized gradients (!)");
     save("Impress Office Open XML");
 }
+
+CPPUNIT_TEST_FIXTURE(TestMCGR, testStepCount)
+{
+    // Given a document with two-color gradient with StepCount 4.
+    loadFromURL(u"tdf155852_MCGR_StepCount4.fodp");
+    // Save it to PPTX
+    save("Impress Office Open XML");
+    xmlDocUniquePtr pXmlDoc = parseExport("ppt/slides/slide1.xml");
+
+    // Without the fix the colors in the sections were wrong. And when opening a file with StepCount
+    // and saving it immedialtly to pptx, a continues gradient might be produced.
+
+    const OString sPath = "//a:gradFill/a:gsLst/";
+    // The default way of load and save would have produced 2 stops, but we need start stop, end stop
+    // and 3*2 inner stops.
+    assertXPath(pXmlDoc, sPath + "a:gs", 8);
+    // A sharp color changes nees a pair of two stops with same offset.
+    assertXPath(pXmlDoc, sPath + "a:gs[@pos='25000']", 2);
+    assertXPath(pXmlDoc, sPath + "a:gs[@pos='50000']", 2);
+    assertXPath(pXmlDoc, sPath + "a:gs[@pos='75000']", 2);
+    // Without fix the color was 808080.
+    assertXPath(pXmlDoc, sPath + "a:gs[@pos='75000'][1]/a:srgbClr", "val", "55aaaa");
+    // Without fix the color was 40bfbf, producing a gradient in the last segment.
+    assertXPath(pXmlDoc, sPath + "a:gs[@pos='75000'][2]/a:srgbClr", "val", "00ffff");
+}
 }
 
 CPPUNIT_PLUGIN_IMPLEMENT();