tdf#55058 tdf#143875 EMF+ Don't change line weight while rotating

Previously when TranfromationMatrix was used with rotation,
the line weight and dashed line shapes were changed.
In worst case if angle was larger than 90 degrees,
the lines just disappear.

This patch fixes that. The line looks exactly after rotation
(with TranfromationMatrix).

The tests were updated (added some additional rotation),
to prove that now it is working correctly.

Change-Id: Ic2382fa8d1b711a6bf06c94b2d0b9da9e7d396f0
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/133329
Tested-by: Jenkins
Reviewed-by: Bartosz Kosiorek <gang65@poczta.onet.pl>

5 files changed, 40 insertions, 23 deletions

diff --git a/drawinglayer/source/tools/emfphelperdata.cxx b/drawinglayer/source/tools/emfphelperdata.cxx
index 84d848ed2c1a..a7f809373e09 100644
--- a/drawinglayer/source/tools/emfphelperdata.cxx
+++ b/drawinglayer/source/tools/emfphelperdata.cxx
@@ -442,6 +442,10 @@ namespace emfplushelper
         maMapTransform *= basegfx::utils::createScaleTranslateB2DHomMatrix(100.0 * mnMmX / mnPixX, 100.0 * mnMmY / mnPixY,
                                                                            double(-mnFrameLeft), double(-mnFrameTop));
         maMapTransform *= maBaseTransform;
+
+        // Used only for performance optimization, to do not calculate it every line draw
+        mdExtractedXScale = std::hypot(maMapTransform.a(), maMapTransform.b());
+        mdExtractedYScale = std::hypot(maMapTransform.c(), maMapTransform.d());
     }
 
     ::basegfx::B2DPoint EmfPlusHelperData::Map(double ix, double iy) const
@@ -531,7 +535,7 @@ namespace emfplushelper
             SAL_WARN_IF(pen->startCap != pen->endCap, "drawinglayer.emf", "emf+ pen uses different start and end cap");
         }
 
-        const double transformedPenWidth = maMapTransform.get(0, 0) * pen->penWidth;
+        const double transformedPenWidth = mdExtractedYScale * pen->penWidth;
         drawinglayer::attribute::LineAttribute lineAttribute(pen->GetColor().getBColor(),
                                                              transformedPenWidth,
                                                              pen->GetLineJoinType(),
@@ -543,7 +547,7 @@ namespace emfplushelper
                 new drawinglayer::primitive2d::PolyPolygonStrokePrimitive2D(
                     polygon,
                     lineAttribute,
-                    pen->GetStrokeAttribute(maMapTransform.get(1, 1))));
+                    pen->GetStrokeAttribute(mdExtractedXScale)));
         }
         else
         {
@@ -551,7 +555,7 @@ namespace emfplushelper
                         new drawinglayer::primitive2d::PolyPolygonStrokePrimitive2D(
                             polygon,
                             lineAttribute,
-                            pen->GetStrokeAttribute(maMapTransform.get(1, 1))));
+                            pen->GetStrokeAttribute(mdExtractedXScale)));
 
             mrTargetHolders.Current().append(
                         new drawinglayer::primitive2d::UnifiedTransparencePrimitive2D(
diff --git a/drawinglayer/source/tools/emfphelperdata.hxx b/drawinglayer/source/tools/emfphelperdata.hxx
index 563f7773c3ba..600f666145af 100644
--- a/drawinglayer/source/tools/emfphelperdata.hxx
+++ b/drawinglayer/source/tools/emfphelperdata.hxx
@@ -210,6 +210,11 @@ namespace emfplushelper
         GraphicStateMap             mGSStack;
         GraphicStateMap             mGSContainerStack;
 
+        /* Performance optimizators */
+        /* Extracted Scale values from Transformation Matrix */
+        double mdExtractedXScale;
+        double mdExtractedYScale;
+
         /// data holders
         wmfemfhelper::TargetHolders&    mrTargetHolders;
         wmfemfhelper::PropertyHolders&  mrPropertyHolders;
diff --git a/drawinglayer/source/tools/primitive2dxmldump.cxx b/drawinglayer/source/tools/primitive2dxmldump.cxx
index 61264496ff98..3074ad30690a 100644
--- a/drawinglayer/source/tools/primitive2dxmldump.cxx
+++ b/drawinglayer/source/tools/primitive2dxmldump.cxx
@@ -143,7 +143,7 @@ void writeStrokeAttribute(::tools::XmlWriter& rWriter,
         OUString sDotDash;
         for (double fDotDash : rStrokeAttribute.getDotDashArray())
         {
-            sDotDash += OUString::number(round(100.0 * fDotDash)) + " ";
+            sDotDash += OUString::number(lround(fDotDash)) + " ";
         }
         rWriter.attribute("dotDashArray", sDotDash);
         rWriter.attribute("fullDotDashLength", rStrokeAttribute.getFullDotDashLen());
diff --git a/emfio/qa/cppunit/emf/EmfImportTest.cxx b/emfio/qa/cppunit/emf/EmfImportTest.cxx
index 6c4785bf2c8d..e8db00e21fcc 100644
--- a/emfio/qa/cppunit/emf/EmfImportTest.cxx
+++ b/emfio/qa/cppunit/emf/EmfImportTest.cxx
@@ -385,13 +385,13 @@ void Test::TestDrawLine()
 
     // check correct import of the DrawLine: color and width of the line
     assertXPath(pDocument, aXPathPrefix + "polypolygonstroke/line", "color", "#000000");
-    assertXPath(pDocument, aXPathPrefix + "polypolygonstroke/line", "width", "33");
+    assertXPath(pDocument, aXPathPrefix + "polypolygonstroke/line", "width", "23");
 }
 
 void Test::TestDrawLineWithDash()
 {
-    // EMF+ with records: DrawLine
-    // The lines with different dash styles
+    // EMF+ with records: DrawLine, ScaleWorldTransform, RotateWorldTransform
+    // Test lines with different dash styles and different World Rotation
     Primitive2DSequence aSequence
         = parseEmf(u"/emfio/qa/cppunit/emf/data/TestEmfPlusDrawLineWithDash.emf");
     CPPUNIT_ASSERT_EQUAL(1, static_cast<int>(aSequence.getLength()));
@@ -400,23 +400,31 @@ void Test::TestDrawLineWithDash()
     CPPUNIT_ASSERT(pDocument);
 
     // check correct import of the DrawLine: color and width of the line
-    assertXPath(pDocument, aXPathPrefix + "polypolygonstroke", 10);
-    assertXPath(pDocument, aXPathPrefix + "polypolygonstroke[1]/line", "color", "#000000");
-    assertXPath(pDocument, aXPathPrefix + "polypolygonstroke[1]/line", "width", "132");
-    assertXPath(pDocument, aXPathPrefix + "polypolygonstroke[1]/stroke", 0);
-
-    assertXPath(pDocument, aXPathPrefix + "polypolygonstroke[2]/line", "width", "132");
-    assertXPath(pDocument, aXPathPrefix + "polypolygonstroke[2]/stroke", "dotDashArray",
-                "13225 13225 ");
-    assertXPath(pDocument, aXPathPrefix + "polypolygonstroke[3]/stroke", "dotDashArray",
-                "39674 13225 ");
-    assertXPath(pDocument, aXPathPrefix + "polypolygonstroke[4]/stroke", "dotDashArray",
-                "39674 13225 13225 13225 ");
-    assertXPath(pDocument, aXPathPrefix + "polypolygonstroke[5]/stroke", "dotDashArray",
-                "39674 13225 13225 13225 13225 13225 ");
+    assertXPath(pDocument, aXPathPrefix + "mask/polypolygonstroke", 12);
+    assertXPath(pDocument, aXPathPrefix + "mask/polypolygonstroke[1]/line", "color", "#000000");
+    assertXPath(pDocument, aXPathPrefix + "mask/polypolygonstroke[1]/line", "width", "185");
+    assertXPath(pDocument, aXPathPrefix + "mask/polypolygonstroke[1]/stroke", 0);
+
+    assertXPath(pDocument, aXPathPrefix + "mask/polypolygonstroke[2]/line", "width", "185");
+    assertXPath(pDocument, aXPathPrefix + "mask/polypolygonstroke[2]/stroke", "dotDashArray",
+                "185 185 ");
+    assertXPath(pDocument, aXPathPrefix + "mask/polypolygonstroke[3]/line", "width", "185");
+    assertXPath(pDocument, aXPathPrefix + "mask/polypolygonstroke[3]/stroke", "dotDashArray",
+                "556 185 ");
+    assertXPath(pDocument, aXPathPrefix + "mask/polypolygonstroke[4]/line", "width", "185");
+    assertXPath(pDocument, aXPathPrefix + "mask/polypolygonstroke[4]/stroke", "dotDashArray",
+                "556 185 185 185 ");
+    assertXPath(pDocument, aXPathPrefix + "mask/polypolygonstroke[5]/line", "width", "370");
+    assertXPath(pDocument, aXPathPrefix + "mask/polypolygonstroke[5]/stroke", "dotDashArray",
+                "556 185 185 185 185 185 ");
     //TODO polypolygonstroke[6-9]/stroke add support for PenDataDashedLineOffset
-    assertXPath(pDocument, aXPathPrefix + "polypolygonstroke[10]/stroke", "dotDashArray",
-                "66124 26450 198372 52899 ");
+    assertXPath(pDocument, aXPathPrefix + "mask/polypolygonstroke[10]/line", "width", "370");
+    assertXPath(pDocument, aXPathPrefix + "mask/polypolygonstroke[10]/stroke", "dotDashArray",
+                "1851 741 5554 1481 ");
+    assertXPath(pDocument, aXPathPrefix + "mask/polypolygonstroke[11]/line", "width", "370");
+    assertXPath(pDocument, aXPathPrefix + "mask/polypolygonstroke[11]/stroke", "dotDashArray",
+                "1851 741 5554 1481 ");
+    assertXPath(pDocument, aXPathPrefix + "mask/polypolygonstroke[12]/line", "width", "370");
 }
 
 void Test::TestLinearGradient()
diff --git a/emfio/qa/cppunit/emf/data/TestEmfPlusDrawLineWithDash.emf b/emfio/qa/cppunit/emf/data/TestEmfPlusDrawLineWithDash.emf
index dc5af59e3f66..547cfca3fcad 100644
--- a/emfio/qa/cppunit/emf/data/TestEmfPlusDrawLineWithDash.emf
+++ b/emfio/qa/cppunit/emf/data/TestEmfPlusDrawLineWithDash.emf