tdf#152070 PPTX import: fix offset of tile background image

by using bitmap image sizes instead of the original ones.

Change-Id: Id6f2777bf6803bca7252878203a12ab796ac33dc
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/143766
Tested-by: László Németh <nemeth@numbertext.org>
Reviewed-by: László Németh <nemeth@numbertext.org>

2 files changed, 19 insertions, 12 deletions

diff --git a/oox/source/drawingml/fillproperties.cxx b/oox/source/drawingml/fillproperties.cxx
index c68568096fd8..2627a1861850 100644
--- a/oox/source/drawingml/fillproperties.cxx
+++ b/oox/source/drawingml/fillproperties.cxx
@@ -831,10 +831,11 @@ void FillProperties::pushToPropMap( ShapePropertyMap& rPropMap,
                             sal_Int32 nFillBmpSizeY = getLimitedValue< sal_Int32, double >( aOriginalSize.Height * fScaleY, 1, SAL_MAX_INT32 );
                             rPropMap.setProperty( ShapeProperty::FillBitmapSizeY, nFillBmpSizeY );
 
+                            awt::Size aBmpSize(nFillBmpSizeX, nFillBmpSizeY);
                             // offset of the first bitmap tile (given as EMUs), convert to percent
-                            sal_Int16 nTileOffsetX = getDoubleIntervalValue< sal_Int16 >(std::round(maBlipProps.moTileOffsetX.value_or( 0 ) / 3.6 / aOriginalSize.Width), 0, 100 );
+                            sal_Int16 nTileOffsetX = getDoubleIntervalValue< sal_Int16 >(std::round(maBlipProps.moTileOffsetX.value_or( 0 ) / 3.6 / aBmpSize.Width), 0, 100 );
                             rPropMap.setProperty( ShapeProperty::FillBitmapOffsetX, nTileOffsetX );
-                            sal_Int16 nTileOffsetY = getDoubleIntervalValue< sal_Int16 >(std::round(maBlipProps.moTileOffsetY.value_or( 0 ) / 3.6 / aOriginalSize.Height), 0, 100 );
+                            sal_Int16 nTileOffsetY = getDoubleIntervalValue< sal_Int16 >(std::round(maBlipProps.moTileOffsetY.value_or( 0 ) / 3.6 / aBmpSize.Height), 0, 100 );
                             rPropMap.setProperty( ShapeProperty::FillBitmapOffsetY, nTileOffsetY );
                         }
                     }
diff --git a/oox/source/export/drawingml.cxx b/oox/source/export/drawingml.cxx
index 3418a125fac5..86b9b5ac91dc 100644
--- a/oox/source/export/drawingml.cxx
+++ b/oox/source/export/drawingml.cxx
@@ -1887,19 +1887,18 @@ void DrawingML::WriteXGraphicTile(uno::Reference<beans::XPropertySet> const& rXP
     if (rMapMode.GetMapUnit() == MapUnit::MapPixel)
         aOriginalSize = Application::GetDefaultDevice()->PixelToLogic(aOriginalSize,
                                                                       MapMode(MapUnit::Map100thMM));
-    sal_Int32 nOffsetX = 0;
-    if (GetProperty(rXPropSet, "FillBitmapPositionOffsetX"))
-        nOffsetX = (*o3tl::doAccess<sal_Int32>(mAny)) * aOriginalSize.Width() * 3.6;
-
-    sal_Int32 nOffsetY = 0;
-    if (GetProperty(rXPropSet, "FillBitmapPositionOffsetY"))
-        nOffsetY = (*o3tl::doAccess<sal_Int32>(mAny)) * aOriginalSize.Height() * 3.6;
-
-    // convert the X size of bitmap to a percentage
     sal_Int32 nSizeX = 0;
+    sal_Int32 nOffsetX = 0;
     if (GetProperty(rXPropSet, "FillBitmapSizeX"))
     {
         mAny >>= nSizeX;
+        if (GetProperty(rXPropSet, "FillBitmapPositionOffsetX"))
+        {
+            sal_Int32 nX = (nSizeX != 0) ? nSizeX : aOriginalSize.Width();
+            nOffsetX = (*o3tl::doAccess<sal_Int32>(mAny)) * nX * 3.6;
+        }
+
+        // convert the X size of bitmap to a percentage
         if (nSizeX > 0)
             nSizeX = double(nSizeX) / aOriginalSize.Width() * 100000;
         else if (nSizeX < 0)
@@ -1908,11 +1907,18 @@ void DrawingML::WriteXGraphicTile(uno::Reference<beans::XPropertySet> const& rXP
             nSizeX = 100000;
     }
 
-    // convert the Y size of bitmap to a percentage
     sal_Int32 nSizeY = 0;
+    sal_Int32 nOffsetY = 0;
     if (GetProperty(rXPropSet, "FillBitmapSizeY"))
     {
         mAny >>= nSizeY;
+        if (GetProperty(rXPropSet, "FillBitmapPositionOffsetY"))
+        {
+            sal_Int32 nY = (nSizeY != 0) ? nSizeY : aOriginalSize.Height();
+            nOffsetY = (*o3tl::doAccess<sal_Int32>(mAny)) * nY * 3.6;
+        }
+
+        // convert the Y size of bitmap to a percentage
         if (nSizeY > 0)
             nSizeY = double(nSizeY) / aOriginalSize.Height() * 100000;
         else if (nSizeY < 0)