Index: trunk/ppSub/src/ppSubCamera.c
===================================================================
--- trunk/ppSub/src/ppSubCamera.c	(revision 23688)
+++ trunk/ppSub/src/ppSubCamera.c	(revision 23740)
@@ -134,5 +134,5 @@
 
 
-bool ppSubCamera(pmConfig *config)
+bool ppSubCamera(pmConfig *config, ppSubData *data)
 {
     psAssert(config, "Require configuration");
@@ -147,5 +147,5 @@
     pmFPAfile *inVar = defineInputFile(config, input, "PPSUB.INPUT.VARIANCE", "INPUT.VARIANCE",
                                        PM_FPA_FILE_VARIANCE);
-    defineInputFile(config, input, "PPSUB.INPUT.SOURCES", "INPUT.SOURCES", PM_FPA_FILE_CMF);
+    defineInputFile(config, NULL, "PPSUB.INPUT.SOURCES", "INPUT.SOURCES", PM_FPA_FILE_CMF);
 
     // Reference image
@@ -158,25 +158,5 @@
     pmFPAfile *refVar = defineInputFile(config, ref, "PPSUB.REF.VARIANCE", "REF.VARIANCE",
                                         PM_FPA_FILE_VARIANCE);
-    defineInputFile(config, ref, "PPSUB.REF.SOURCES", "REF.SOURCES", PM_FPA_FILE_CMF);
-
-
-    // Output image
-    pmFPAfile *output = defineOutputFile(config, input, true, "PPSUB.OUTPUT", PM_FPA_FILE_IMAGE);
-    pmFPAfile *outMask = defineOutputFile(config, output, false, "PPSUB.OUTPUT.MASK", PM_FPA_FILE_MASK);
-    if (!output || !outMask) {
-        psError(PS_ERR_UNKNOWN, false, "Unable to define output files");
-        return false;
-    }
-    output->save = true;
-    outMask->save = true;
-    pmFPAfile *outVar = NULL;
-    if (inVar && refVar) {
-        outVar = defineOutputFile(config, output, false, "PPSUB.OUTPUT.VARIANCE", PM_FPA_FILE_VARIANCE);
-        if (!outVar) {
-            psError(PS_ERR_UNKNOWN, false, "Unable to define output files");
-            return false;
-        }
-        outVar->save = true;
-    }
+    defineInputFile(config, NULL, "PPSUB.REF.SOURCES", "REF.SOURCES", PM_FPA_FILE_CMF);
 
 
@@ -216,4 +196,66 @@
 
 
+    // Now that the camera has been determined, we can read the recipe
+    psMetadata *recipe = psMetadataLookupMetadata(NULL, config->recipes, PPSUB_RECIPE); // Recipe for ppSim
+    if (!recipe) {
+        psError(PS_ERR_UNEXPECTED_NULL, false, "Unable to find recipe %s", PPSUB_RECIPE);
+        return false;
+    }
+    if (psMetadataLookupBool(NULL, config->arguments, "-photometry")) {
+        psMetadataAddBool(recipe, PS_LIST_TAIL, "PHOTOMETRY", PS_META_REPLACE,
+                          "Perform photometry?", true);
+    }
+    if (psMetadataLookupBool(NULL, config->arguments, "-inverse")) {
+        psMetadataAddBool(recipe, PS_LIST_TAIL, "INVERSE", PS_META_REPLACE,
+                          "Generate inverse subtractions?", true);
+    }
+
+    data->inverse = psMetadataLookupBool(NULL, recipe, "INVERSE");
+    data->photometry = psMetadataLookupBool(NULL, recipe, "PHOTOMETRY");
+
+
+    // Output image
+    pmFPAfile *output = defineOutputFile(config, inConvImage, true, "PPSUB.OUTPUT", PM_FPA_FILE_IMAGE);
+    pmFPAfile *outMask = defineOutputFile(config, output, false, "PPSUB.OUTPUT.MASK", PM_FPA_FILE_MASK);
+    if (!output || !outMask) {
+        psError(PS_ERR_UNKNOWN, false, "Unable to define output files");
+        return false;
+    }
+    output->save = true;
+    outMask->save = true;
+    if (inVar && refVar) {
+        pmFPAfile *outVar = defineOutputFile(config, output, false, "PPSUB.OUTPUT.VARIANCE",
+                                             PM_FPA_FILE_VARIANCE);
+        if (!outVar) {
+            psError(PS_ERR_UNKNOWN, false, "Unable to define output files");
+            return false;
+        }
+        outVar->save = true;
+    }
+
+    pmFPAfile *inverse = NULL;          // Inverse output image
+    if (data->inverse) {
+        // Inverse output image
+        inverse = defineOutputFile(config, output, true, "PPSUB.INVERSE", PM_FPA_FILE_IMAGE);
+        pmFPAfile *invMask = defineOutputFile(config, inverse, false, "PPSUB.INVERSE.MASK",
+                                              PM_FPA_FILE_MASK);
+        if (!inverse || !invMask) {
+            psError(PS_ERR_UNKNOWN, false, "Unable to define output files");
+            return false;
+        }
+        inverse->save = true;
+        invMask->save = true;
+        if (inVar && refVar) {
+            pmFPAfile *invVar = defineOutputFile(config, inverse, false, "PPSUB.INVERSE.VARIANCE",
+                                                 PM_FPA_FILE_VARIANCE);
+            if (!invVar) {
+                psError(PS_ERR_UNKNOWN, false, "Unable to define output files");
+                return false;
+            }
+            invVar->save = true;
+        }
+    }
+
+
     // Output JPEGs
     pmFPAfile *jpeg1 = pmFPAfileDefineOutput(config, NULL, "PPSUB.OUTPUT.JPEG1");
@@ -245,25 +287,7 @@
     }
 
-    psMetadata *recipe = psMetadataLookupMetadata(NULL, config->recipes, PPSUB_RECIPE); // Recipe for ppSim
-    if (!recipe) {
-        psError(PS_ERR_UNEXPECTED_NULL, false, "Unable to find recipe %s", PPSUB_RECIPE);
-        return false;
-    }
-
     // psPhot input
-    if (psMetadataLookupBool(NULL, recipe, "PHOTOMETRY")) {
+    if (data->photometry) {
         psphotModelClassInit();        // load implementation-specific models
-
-        // Internal-ish file for getting the PSF from the minuend
-        pmFPAfile *psf = pmFPAfileDefineOutputFromFile(config, output, "PSPHOT.PSF.LOAD");
-        if (!psf) {
-            psError(PS_ERR_IO, false, "Failed to build FPA from PSPHOT.PSF.LOAD");
-            return false;
-        }
-        if (psf->type != PM_FPA_FILE_PSF) {
-            psError(PS_ERR_IO, true, "PSPHOT.PSF.LOAD is not of type PSF");
-            return false;
-        }
-        pmFPAfileActivate(config->files, false, "PSPHOT.PSF.LOAD");
 
         pmFPAfile *psphot = pmFPAfileDefineFromFPA(config, output->fpa, 1, 1, "PSPHOT.INPUT");
@@ -276,4 +300,17 @@
             return false;
         }
+        pmFPAfileActivate(config->files, false, "PSPHOT.INPUT");
+
+        // Internal-ish file for getting the PSF from the minuend
+        pmFPAfile *psf = pmFPAfileDefineOutputFromFile(config, psphot, "PSPHOT.PSF.LOAD");
+        if (!psf) {
+            psError(PS_ERR_IO, false, "Failed to build FPA from PSPHOT.PSF.LOAD");
+            return false;
+        }
+        if (psf->type != PM_FPA_FILE_PSF) {
+            psError(PS_ERR_IO, true, "PSPHOT.PSF.LOAD is not of type PSF");
+            return false;
+        }
+        pmFPAfileActivate(config->files, false, "PSPHOT.PSF.LOAD");
 
         if (!psphotDefineFiles(config, psphot)) {
@@ -281,4 +318,26 @@
             return false;
         }
+
+        // Deactivate psphot output sources --- we want to define output source files of our own
+        pmFPAfile *psphotOutput = pmFPAfileSelectSingle(config->files, "PSPHOT.OUTPUT", 0);
+        psphotOutput->save = false;
+
+        pmFPAfile *outSources = defineOutputFile(config, output, false, "PPSUB.OUTPUT.SOURCES",
+                                                 PM_FPA_FILE_CMF);
+        if (!outSources) {
+            psError(PS_ERR_UNKNOWN, false, "Unable to set up output source file.");
+            return false;
+        }
+        outSources->save = true;
+
+        if (data->inverse) {
+            pmFPAfile *invSources = defineOutputFile(config, inverse, false, "PPSUB.INVERSE.SOURCES",
+                                                     PM_FPA_FILE_CMF);
+            if (!invSources) {
+                psError(PS_ERR_UNKNOWN, false, "Unable to set up inverse source file.");
+                return false;
+            }
+            invSources->save = true;
+        }
     }