MCGR: Adapted other Gradient* to make use of MCGR

Added to make
  GeoTexSvxGradientElliptical
  GeoTexSvxGradientSquare
  GeoTexSvxGradientRect
work using the MCGR. It is still 100%
backward-compatible, so as long as there is no
source using this it will stay invisible - by
purpose.

Tests look good with all three, see the static
variable nUseGradientSteps.

NOTE: GeoTexSvxGradientElliptical still looks not
optimal due to texture back-mapping method
getEllipticalGradientAlpha, see notes in
commit "MCGR: Adapted GradientRadial to make use
of MCGR" ac824594c577ab4880177b3411a25297b1d08074

Change-Id: I56b82b867af88fe532f840dde15e0f5c299ed6a3
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/147662
Tested-by: Jenkins
Reviewed-by: Armin Le Grand <Armin.Le.Grand@me.com>

1 files changed, 2 insertions, 25 deletions

diff --git a/basegfx/source/tools/gradienttools.cxx b/basegfx/source/tools/gradienttools.cxx
index 37671374262c..f35f91f5a79a 100644
--- a/basegfx/source/tools/gradienttools.cxx
+++ b/basegfx/source/tools/gradienttools.cxx
@@ -544,13 +544,6 @@ namespace basegfx
                 t = 1.0 - std::hypot(aCoor.getX(), aCoor.getY() * fAspectRatio);
             }
 
-            const sal_uInt32 nSteps(rGradInfo.getRequestedSteps());
-
-            if(nSteps && t < 1.0)
-            {
-                return floor(t * nSteps) / double(nSteps - 1);
-            }
-
             return t;
         }
 
@@ -571,15 +564,7 @@ namespace basegfx
                 return 0.0;
             }
 
-            const double t(1.0 - std::max(fAbsX, fAbsY));
-            const sal_uInt32 nSteps(rGradInfo.getRequestedSteps());
-
-            if(nSteps && t < 1.0)
-            {
-                return floor(t * nSteps) / double(nSteps - 1);
-            }
-
-            return t;
+            return 1.0 - std::max(fAbsX, fAbsY);
         }
 
         double getRectangularGradientAlpha(const B2DPoint& rUV, const ODFGradientInfo& rGradInfo)
@@ -643,15 +628,7 @@ namespace basegfx
                 fAbsY = ((fAbsY - 1) / fAspectRatio) + 1;
             }
 
-            const double t(1.0 - std::max(fAbsX, fAbsY));
-            const sal_uInt32 nSteps(rGradInfo.getRequestedSteps());
-
-            if(nSteps && t < 1.0)
-            {
-                return floor(t * nSteps) / double(nSteps - 1);
-            }
-
-            return t;
+            return 1.0 - std::max(fAbsX, fAbsY);
         }
     } // namespace utils
 } // namespace basegfx