Related: tdf#146453 retain accurate positioning in rotated text rendering

Change-Id: I477c5a72dd9618a2b0f3e91a96209ae3f6b3d1aa
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/128484
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>

include/vcl/vcllayout.hxx

@@ -82,6 +82,11 @@ public:
     int             GetUnitsPerPixel() const                { return mnUnitsPerPixel; }
     Degree10        GetOrientation() const                  { return mnOrientation; }
 
+    void            SetTextRenderModeForResolutionIndependentLayout(bool bTextRenderModeForResolutionIndependentLayout)
+    {
+        mbTextRenderModeForResolutionIndependentLayout = bTextRenderModeForResolutionIndependentLayout;
+    }
+
     // methods using string indexing
     virtual sal_Int32 GetTextBreak(DeviceCoordinate nMaxWidth, DeviceCoordinate nCharExtra, int nFactor) const = 0;
     virtual DeviceCoordinate FillDXArray( std::vector<DeviceCoordinate>* pDXArray ) const = 0;
@@ -115,6 +120,8 @@ protected:
 
     mutable Point   maDrawOffset;
     DevicePoint     maDrawBase;
+
+    bool            mbTextRenderModeForResolutionIndependentLayout;
 };
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

vcl/source/gdi/sallayout.cxx

@@ -135,7 +135,8 @@ SalLayout::SalLayout()
     mnEndCharPos( -1 ),
     mnUnitsPerPixel( 1 ),
     mnOrientation( 0 ),
-    maDrawOffset( 0, 0 )
+    maDrawOffset( 0, 0 ),
+    mbTextRenderModeForResolutionIndependentLayout(false)
 {}
 
 SalLayout::~SalLayout()
@@ -171,9 +172,18 @@ DevicePoint SalLayout::GetDrawPosition(const DevicePoint& rRelative) const
 
         double fX = aOfs.getX();
         double fY = aOfs.getY();
-        tools::Long nX = static_cast<tools::Long>( +fCos * fX + fSin * fY );
-        tools::Long nY = static_cast<tools::Long>( +fCos * fY - fSin * fX );
-        aPos += DevicePoint(nX, nY);
+        if (mbTextRenderModeForResolutionIndependentLayout)
+        {
+            double nX = +fCos * fX + fSin * fY;
+            double nY = +fCos * fY - fSin * fX;
+            aPos += DevicePoint(nX, nY);
+        }
+        else
+        {
+            tools::Long nX = static_cast<tools::Long>( +fCos * fX + fSin * fY );
+            tools::Long nY = static_cast<tools::Long>( +fCos * fY - fSin * fX );
+            aPos += DevicePoint(nX, nY);
+        }
     }
 
     return aPos;

vcl/source/outdev/text.cxx

@@ -1411,6 +1411,8 @@ std::unique_ptr<SalLayout> OutputDevice::ImplLayout(const OUString& rOrigStr,
     if( !pSalLayout )
         return nullptr;
 
+    pSalLayout->SetTextRenderModeForResolutionIndependentLayout(bTextRenderModeForResolutionIndependentLayout);
+
     // do glyph fallback if needed
     // #105768# avoid fallback for very small font sizes
     if (aLayoutArgs.HasFallbackRun() && mpFontInstance->GetFontSelectPattern().mnHeight >= 3)