tdf#133477 basegfx: fix center of rotated gradients

in the case of square and quadratic gradient styles.

Change-Id: I2e5522930b472bf2ee702c780f39aa187bd7b64f
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/95356
Tested-by: László Németh <nemeth@numbertext.org>
Reviewed-by: László Németh <nemeth@numbertext.org>

basegfx/source/tools/gradienttools.cxx

@@ -244,9 +244,9 @@ namespace basegfx
         // add defined offsets after rotation
         if(!fTools::equal(0.5, rOffset.getX()) || !fTools::equal(0.5, rOffset.getY()))
         {
-            // use scaled target size
-            fTargetOffsetX += (rOffset.getX() - 0.5) * fTargetSizeX;
-            fTargetOffsetY += (rOffset.getY() - 0.5) * fTargetSizeY;
+            // use original target size
+            fTargetOffsetX += (rOffset.getX() - 0.5) * rTargetRange.getWidth();
+            fTargetOffsetY += (rOffset.getY() - 0.5) * rTargetRange.getHeight();
         }
 
         // add object translate

sw/qa/extras/uiwriter/data3/tdf133477.fodt

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<office:document xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:style="urn:oasis:names:tc:opendocument:xmlns:style:1.0" xmlns:text="urn:oasis:names:tc:opendocument:xmlns:text:1.0" xmlns:draw="urn:oasis:names:tc:opendocument:xmlns:drawing:1.0" xmlns:svg="urn:oasis:names:tc:opendocument:xmlns:svg-compatible:1.0" xmlns:loext="urn:org:documentfoundation:names:experimental:office:xmlns:loext:1.0" office:version="1.2" office:mimetype="application/vnd.oasis.opendocument.text">
+ <office:styles>
+  <draw:gradient draw:name="Gradient_20_1" draw:display-name="Gradient 1" draw:style="rectangular" draw:cx="0%" draw:cy="0%" draw:start-color="#ffff00" draw:end-color="#0066cc" draw:start-intensity="100%" draw:end-intensity="100%" draw:angle="45deg" draw:border="0%"/>
+  <style:style style:name="Standard" style:family="paragraph" style:class="text"/>
+ </office:styles>
+ <office:automatic-styles>
+  <style:style style:name="gr1" style:family="graphic">
+   <style:graphic-properties draw:stroke="none" svg:stroke-width="0cm" svg:stroke-color="#000000" draw:marker-start="" draw:marker-start-width="0.3cm" draw:marker-start-center="false" draw:marker-end="" draw:marker-end-width="0.3cm" draw:marker-end-center="false" draw:fill="gradient" draw:fill-color="#00b8ff" draw:fill-gradient-name="Gradient_20_1" draw:gradient-step-count="3" draw:textarea-horizontal-align="center" draw:textarea-vertical-align="middle" draw:shadow="hidden" draw:shadow-offset-x="0.3cm" draw:shadow-offset-y="0.3cm" draw:shadow-color="#808080" style:run-through="foreground" style:wrap="run-through" style:number-wrapped-paragraphs="no-limit" style:vertical-pos="middle" style:vertical-rel="baseline" style:horizontal-pos="from-left" style:horizontal-rel="paragraph" draw:wrap-influence-on-position="once-concurrent" loext:allow-overlap="true" style:flow-with-text="false"/>
+  </style:style>
+ </office:automatic-styles>
+ <office:body>
+  <office:text>
+   <text:p text:style-name="Standard"><draw:rect text:anchor-type="as-char" draw:z-index="0" draw:name="Alakzat1" draw:style-name="gr1" svg:width="4cm" svg:height="10cm">
+     <text:p/>
+    </draw:rect></text:p>
+   <text:p text:style-name="Standard">Top left corner is blue.</text:p>
+  </office:text>
+ </office:body>
+</office:document>

sw/qa/extras/uiwriter/uiwriter3.cxx

@@ -10,6 +10,7 @@
 #include <swmodeltestbase.hxx>
 #include <LibreOfficeKit/LibreOfficeKitEnums.h>
 #include <vcl/scheduler.hxx>
+#include <com/sun/star/drawing/GraphicExportFilter.hpp>
 #include <com/sun/star/text/TextContentAnchorType.hpp>
 #include <com/sun/star/text/XTextTablesSupplier.hpp>
 #include <com/sun/star/text/XTextTable.hpp>
@@ -22,6 +23,7 @@
 #include <fmtanchr.hxx>
 #include <o3tl/safeint.hxx>
 #include <tools/json_writer.hxx>
+#include <unotools/streamwrap.hxx>
 
 #include <wrtsh.hxx>
 #include <unotxdoc.hxx>
@@ -1304,4 +1306,31 @@ CPPUNIT_TEST_FIXTURE(SwUiWriterTest3, testTdf127652)
     CPPUNIT_ASSERT_EQUAL_MESSAGE("We are on the wrong page!", assertPage, currentPage);
 }
 
+CPPUNIT_TEST_FIXTURE(SwUiWriterTest3, testTdf133477)
+{
+    load(DATA_DIRECTORY, "tdf133477.fodt");
+    SwXTextDocument* pTextDoc = dynamic_cast<SwXTextDocument*>(mxComponent.get());
+    CPPUNIT_ASSERT(pTextDoc);
+
+    // Save the shape to a BMP.
+    uno::Reference<drawing::XGraphicExportFilter> xGraphicExporter
+        = drawing::GraphicExportFilter::create(mxComponentContext);
+    uno::Reference<lang::XComponent> xSourceDoc(getShape(1), uno::UNO_QUERY);
+    xGraphicExporter->setSourceDocument(xSourceDoc);
+
+    SvMemoryStream aStream;
+    uno::Reference<io::XOutputStream> xOutputStream(new utl::OStreamWrapper(aStream));
+    uno::Sequence<beans::PropertyValue> aDescriptor(
+        comphelper::InitPropertySequence({ { "OutputStream", uno::makeAny(xOutputStream) },
+                                           { "FilterName", uno::makeAny(OUString("BMP")) } }));
+    xGraphicExporter->filter(aDescriptor);
+    aStream.Seek(STREAM_SEEK_TO_BEGIN);
+
+    // Read it back and check the color of the first pixel.
+    Graphic aGraphic;
+    ReadGraphic(aStream, aGraphic);
+    BitmapEx aBitmap = aGraphic.GetBitmapEx();
+    CPPUNIT_ASSERT_EQUAL(Color(0, 102, 204), aBitmap.GetPixelColor(0, 0));
+}
+
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