PPTX export, custom shape, bitmap fill: fix source vs fill rect confusion

Commit 682ab832522b1349f1714bcb16f6e83468ea2920 (drawingML
export\import: cropping of shape's fill texture, 2014-02-12) improved
the DOCX filter, so the fill rectangle of a custom shape with bitmap
fill is handled.

The problem is drawingML has a source rectangle (similar to our crop
rect) to limit the usage of the bitmap, and also it has a fill rectangle
in case some margin is wanted around a stretched bitmap. We don't have a
mapping for the later.

Fix the problem by limiting the above work for DOCX, this way PPTX's
source rectangle won't be turned into a stretch's fill rectangle.

This way no unwanted margins will appear around the image -- those
margins can be large enough that the image effectively disappears on
export.

Change-Id: Ic35063545a56eec9eaf885bbd397a854705d134f
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/96025
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins
(cherry picked from commit b00e43fa5848be0cc7ba81b185021511d94cdc00)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/96097

1 files changed, 13 insertions, 0 deletions

diff --git a/oox/source/export/drawingml.cxx b/oox/source/export/drawingml.cxx
index fc5807ee61ba..f14129d0a2e8 100644
--- a/oox/source/export/drawingml.cxx
+++ b/oox/source/export/drawingml.cxx
@@ -1443,6 +1443,12 @@ void DrawingML::WriteXGraphicBlipFill(uno::Reference<beans::XPropertySet> const
 
     WriteXGraphicBlip(rXPropSet, rxGraphic, bRelPathToMedia);
 
+    if (GetDocumentType() != DOCUMENT_DOCX)
+    {
+        // Write the crop rectangle of Impress as a source rectangle.
+        WriteSrcRectXGraphic(rXPropSet, rxGraphic);
+    }
+
     if (bWriteMode)
     {
         WriteXGraphicBlipMode(rXPropSet, rxGraphic);
@@ -1538,6 +1544,13 @@ void DrawingML::WriteSrcRectXGraphic(uno::Reference<beans::XPropertySet> const &
 void DrawingML::WriteXGraphicStretch(uno::Reference<beans::XPropertySet> const & rXPropSet,
                                      uno::Reference<graphic::XGraphic> const & rxGraphic)
 {
+    if (GetDocumentType() != DOCUMENT_DOCX)
+    {
+        // Limiting the area used for stretching is not supported in Impress.
+        mpFS->singleElementNS(XML_a, XML_stretch);
+        return;
+    }
+
     mpFS->startElementNS(XML_a, XML_stretch);
 
     bool bCrop = false;