Index: trunk/psModules/src/imcombine/pmSubtraction.c
===================================================================
--- trunk/psModules/src/imcombine/pmSubtraction.c	(revision 14701)
+++ trunk/psModules/src/imcombine/pmSubtraction.c	(revision 14709)
@@ -4,6 +4,6 @@
  *  @author GLG, MHPCC
  *
- *  @version $Revision: 1.49 $ $Name: not supported by cvs2svn $
- *  @date $Date: 2007-08-30 03:50:28 $
+ *  @version $Revision: 1.50 $ $Name: not supported by cvs2svn $
+ *  @date $Date: 2007-08-30 21:45:26 $
  *
  *  Copyright 2004-2007 Institute for Astronomy, University of Hawaii
@@ -249,17 +249,4 @@
 }
 
-// Generate the convolution given a precalculated kernel
-static psKernel *convolvePrecalc(const psKernel *image, // Image to convolve (a kernel for convenience)
-                                 const psKernel *kernel, // Kernel by which to convolve
-                                 int footprint // Size of region of interest
-                                 )
-{
-    psImage *conv = psImageConvolveFFT(image->image, kernel, 0.0); // Convolved image
-    int x0 = - image->xMin, y0 = - image->yMin; // Position of centre of convolved image
-    psKernel *convolved = psKernelAllocFromImage(conv, x0, y0); // Kernel version
-    psFree(conv);
-    return convolved;
-}
-
 // Generate the convolved reference image
 static psKernel *convolveRef(const pmSubtractionKernels *kernels, // Kernel basis functions
@@ -308,5 +295,5 @@
           if (index < kernels->inner) {
               // Photometric scaling is already built in to the precalculated kernel
-              return convolvePrecalc(image, kernels->preCalc->data[index], footprint);
+              return p_pmSubtractionConvolveStampPrecalc(image, kernels->preCalc->data[index]);
           }
           // Using delta function
@@ -321,5 +308,5 @@
       case PM_SUBTRACTION_KERNEL_ISIS: {
           // Photometric scaling is already built in to the precalculated kernel
-          return convolvePrecalc(image, kernels->preCalc->data[index], footprint);
+          return p_pmSubtractionConvolveStampPrecalc(image, kernels->preCalc->data[index]);
       }
       case PM_SUBTRACTION_KERNEL_RINGS: {
@@ -355,4 +342,62 @@
 }
 
+// Convolve an image using FFT
+static void convolveFFT(psImage *target,// Place the result in here
+                        const psImage *image, // Image to convolve
+                        const psKernel *kernel, // Kernel by which to convolve
+                        psRegion region,// Region of interest
+                        float background, // Background to add
+                        int size        // Size of (square) kernel
+                        )
+{
+    psRegion border = psRegionSet(region.x0 - size, region.x1 + size,
+                                  region.y0 - size, region.y1 + size); // Add a border
+
+    // Casting away const so psImageSubset can add the child
+    psImage *subImage = psImageSubset((psImage*)image, border); // Subimage to convolve
+    psImage *convolved = psImageConvolveFFT(subImage, kernel, 0.0); // Convolution
+    psFree(subImage);
+
+    // Now, we have to chop off the borders, and stick it in where it belongs
+    psImage *subConv = psImageSubset(convolved, psRegionSet(size, -size,
+                                                            size, -size)); // Cut off the edges
+    psImage *subTarget = psImageSubset(target, region); // Target for this subregion
+    if (background != 0.0) {
+        psBinaryOp(subTarget, subConv, "+", psScalarAlloc(background, PS_TYPE_F32));
+    } else {
+        int numBytes = subTarget->numCols * PSELEMTYPE_SIZEOF(PS_TYPE_F32); // Number of bytes to copy
+        for (int y = 0; y < subTarget->numRows; y++) {
+            memcpy(subTarget->data.F32[y], subConv->data.F32[y], numBytes);
+        }
+    }
+    psFree(subConv);
+    psFree(convolved);
+    psFree(subTarget);
+    return;
+}
+
+// Convolve an image directly
+static void convolveDirect(psImage *target, // Put the result here
+                           const psImage *image, // Image to convolve
+                           const psKernel *kernel, // Kernel by which to convolve
+                           psRegion region,// Region of interest
+                           float background, // Background to add
+                           int size        // Size of (square) kernel
+                           )
+{
+    for (int y = region.y0; y < region.y1; y++) {
+        for (int x = region.x0; x < region.x1; x++) {
+            target->data.F32[y][x] = background;
+            for (int v = -size; v <= size; v++) {
+                for (int u = -size; u <= size; u++) {
+                    target->data.F32[y][x] += kernel->kernel[v][u] *
+                        image->data.F32[y - v][x - u];
+                }
+            }
+        }
+    }
+    return;
+}
+
 // Mark a pixel as blank in the image, mask and weight
 static inline void markBlank(psImage *image, // Image to mark as blank
@@ -372,4 +417,22 @@
     return;
 }
+
+//////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// Semi-public functions
+//////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+// Generate the convolution given a precalculated kernel
+psKernel *p_pmSubtractionConvolveStampPrecalc(const psKernel *image, const psKernel *kernel)
+{
+    PS_ASSERT_KERNEL_NON_NULL(image, NULL);
+    PS_ASSERT_KERNEL_NON_NULL(kernel, NULL);
+
+    psImage *conv = psImageConvolveFFT(image->image, kernel, 0.0); // Convolved image
+    int x0 = - image->xMin, y0 = - image->yMin; // Position of centre of convolved image
+    psKernel *convolved = psKernelAllocFromImage(conv, x0, y0); // Kernel version
+    psFree(conv);
+    return convolved;
+}
+
 
 //////////////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -916,62 +979,4 @@
 }
 
-// Convolve an image using FFT
-static void convolveFFT(psImage *target,// Place the result in here
-                        const psImage *image, // Image to convolve
-                        const psKernel *kernel, // Kernel by which to convolve
-                        psRegion region,// Region of interest
-                        float background, // Background to add
-                        int size        // Size of (square) kernel
-                        )
-{
-    psRegion border = psRegionSet(region.x0 - size, region.x1 + size,
-                                  region.y0 - size, region.y1 + size); // Add a border
-
-    // Casting away const so psImageSubset can add the child
-    psImage *subImage = psImageSubset((psImage*)image, border); // Subimage to convolve
-    psImage *convolved = psImageConvolveFFT(subImage, kernel, 0.0); // Convolution
-    psFree(subImage);
-
-    // Now, we have to chop off the borders, and stick it in where it belongs
-    psImage *subConv = psImageSubset(convolved, psRegionSet(size, -size,
-                                                            size, -size)); // Cut off the edges
-    psImage *subTarget = psImageSubset(target, region); // Target for this subregion
-    if (background != 0.0) {
-        psBinaryOp(subTarget, subConv, "+", psScalarAlloc(background, PS_TYPE_F32));
-    } else {
-        int numBytes = subTarget->numCols * PSELEMTYPE_SIZEOF(PS_TYPE_F32); // Number of bytes to copy
-        for (int y = 0; y < subTarget->numRows; y++) {
-            memcpy(subTarget->data.F32[y], subConv->data.F32[y], numBytes);
-        }
-    }
-    psFree(subConv);
-    psFree(convolved);
-    psFree(subTarget);
-    return;
-}
-
-// Convolve an image directly
-static void convolveDirect(psImage *target, // Put the result here
-                           const psImage *image, // Image to convolve
-                           const psKernel *kernel, // Kernel by which to convolve
-                           psRegion region,// Region of interest
-                           float background, // Background to add
-                           int size        // Size of (square) kernel
-                           )
-{
-    for (int y = region.y0; y < region.y1; y++) {
-        for (int x = region.x0; x < region.x1; x++) {
-            target->data.F32[y][x] = background;
-            for (int v = -size; v <= size; v++) {
-                for (int u = -size; u <= size; u++) {
-                    target->data.F32[y][x] += kernel->kernel[v][u] *
-                        image->data.F32[y - v][x - u];
-                }
-            }
-        }
-    }
-    return;
-}
-
 bool pmSubtractionConvolve(psImage **outImage, psImage **outWeight, psImage **outMask,
                            const psImage *inImage, const psImage *inWeight, const psImage *subMask,