fdo#74702 use same gradient steps func. to draw linear and complex grads

Reworked Output::ImplGetGradientSteps to be usable for both linear and
complex (actually, axial, but that's another story) gradients by adding
a default parameter.

This gets rid of another meOutDevType from gradient functions

Change-Id: I1dc918e4c3153617d172560523cfca303f0b904c
Reviewed-on: https://gerrit.libreoffice.org/8872
Reviewed-by: Chris Sherlock <chris.sherlock79@gmail.com>
Tested-by: Chris Sherlock <chris.sherlock79@gmail.com>

2 files changed, 10 insertions, 24 deletions

diff --git a/include/vcl/outdev.hxx b/include/vcl/outdev.hxx
index 56aa0739c04f..016fc168513c 100644
--- a/include/vcl/outdev.hxx
+++ b/include/vcl/outdev.hxx
@@ -853,7 +853,7 @@ private:
     SAL_DLLPRIVATE void         ImplClearFontData( bool bNewFontLists );
     SAL_DLLPRIVATE void         ImplRefreshFontData( bool bNewFontLists );
     SAL_DLLPRIVATE static void  ImplUpdateFontDataForAllFrames( FontUpdateHandler_t pHdl, bool bNewFontLists );
-    SAL_DLLPRIVATE long         ImplGetGradientSteps( const Gradient& rGradient, const Rectangle& rRect, bool bMtf );
+    SAL_DLLPRIVATE long         ImplGetGradientSteps( const Gradient& rGradient, const Rectangle& rRect, bool bMtf, bool bComplex=false );
 
     // not implemented; to detect misuses of DrawOutDev(...OutputDevice&);
     void                        DrawOutDev( const Point&, const Size&, const Point&,  const Size&, const Printer&);
diff --git a/vcl/source/gdi/outdev4.cxx b/vcl/source/gdi/outdev4.cxx
index a8dc07d1a65e..4b825f44dbfd 100644
--- a/vcl/source/gdi/outdev4.cxx
+++ b/vcl/source/gdi/outdev4.cxx
@@ -145,13 +145,17 @@ long OutputDevice::ImplGetGradientStepCount( long nMinRect )
     return nInc;
 }
 
-long OutputDevice::ImplGetGradientSteps( const Gradient& rGradient, const Rectangle& rRect, bool bMtf )
+long OutputDevice::ImplGetGradientSteps( const Gradient& rGradient, const Rectangle& rRect, bool bMtf, bool bComplex )
 {
     // calculate step count
-    long    nStepCount  = rGradient.GetSteps();
+    long nStepCount  = rGradient.GetSteps();
+    long nMinRect;
 
     // generate nStepCount, if not passed
-    long nMinRect = rRect.GetHeight();
+    if (bComplex)
+        nMinRect = std::min( rRect.GetWidth(), rRect.GetHeight() );
+    else
+        nMinRect = rRect.GetHeight();
 
     if ( !nStepCount )
     {
@@ -385,7 +389,6 @@ void OutputDevice::ImplDrawComplexGradient( const Rectangle& rRect,
     long            nRedSteps = nEndRed - nStartRed;
     long            nGreenSteps = nEndGreen - nStartGreen;
     long            nBlueSteps = nEndBlue   - nStartBlue;
-    long            nStepCount = rGradient.GetSteps();
     sal_uInt16      nAngle = rGradient.GetAngle() % 3600;
 
     rGradient.GetBoundRect( rRect, aRect, aCenter );
@@ -393,25 +396,8 @@ void OutputDevice::ImplDrawComplexGradient( const Rectangle& rRect,
     if ( UsePolyPolygonForComplexGradient() || bMtf )
         pPolyPoly.reset(new PolyPolygon( 2 ));
 
-    long nMinRect = std::min( aRect.GetWidth(), aRect.GetHeight() );
-
-    // calculate number of steps, if this was not passed
-    if( !nStepCount )
-    {
-        long nInc;
-
-        if ( meOutDevType != OUTDEV_PRINTER && !bMtf )
-        {
-            nInc = ( nMinRect < 50 ) ? 2 : 4;
-        }
-        else
-        {
-            // #105998# Use display-equivalent step size calculation
-            nInc = (nMinRect < 800) ? 10 : 20;
-        }
-
-        nStepCount = nMinRect / nInc;
-    }
+    // last parameter - true if complex gradient, false if linear
+    long nStepCount = ImplGetGradientSteps( rGradient, rRect, bMtf, true );
 
     // at least three steps and at most the number of colour differences
     long nSteps = std::max( nStepCount, 2L );