made lensfun-based correction compatible with auto fill mode

rtengine/iptransform.cc

@@ -969,10 +969,6 @@ double ImProcFunctions::getTransformAutoFill (int oW, int oH, const LensCorrecti
         return 1;
     }
 
-    if (pLCPMap && !pLCPMap->supportsAutoFill()) {
-        return 1;
-    }
-
     double scaleU = 2, scaleL = 0.001;  // upper and lower border, iterate inbetween
 
     do {

rtengine/lcp.h

@@ -140,7 +140,6 @@ class LensCorrection {
 public:
     virtual ~LensCorrection() {}
     virtual void correctDistortion(double &x, double &y, int cx, int cy, double scale) const = 0;
-    virtual bool supportsAutoFill() const = 0;
     virtual bool supportsCA() const = 0;
     virtual void correctCA(double &x, double &y, int channel) const = 0;
     virtual void processVignetteLine(int width, int y, float *line) const = 0;
@@ -167,7 +166,6 @@ public:
 
     void correctDistortion(double &x, double &y, int cx, int cy, double scale) const;  // MUST be the first stage
     bool supportsCA() const { return enableCA; }
-    bool supportsAutoFill() const { return true; }
     void correctCA(double& x, double& y, int channel) const;
     void processVignetteLine(int width, int y, float *line) const;
     void processVignetteLine3Channels(int width, int y, float *line) const;

rtengine/rtlensfun.cc

@@ -72,6 +72,8 @@ void LFModifier::correctDistortion(double &x, double &y, int cx, int cy, double
         x -= cx;
         y -= cy;
     }
+    x *= scale;
+    y *= scale;
 }
 
 

rtengine/rtlensfun.h

@@ -34,7 +34,6 @@ public:
     bool ok() const;
     
     void correctDistortion(double &x, double &y, int cx, int cy, double scale) const;
-    bool supportsAutoFill() const { return false; }
     bool supportsCA() const { return false; }
     void correctCA(double &x, double &y, int channel) const {}
     void processVignetteLine(int width, int y, float *line) const;