Index: trunk/psLib/src/imageops/psImageGeomManip.c
===================================================================
--- trunk/psLib/src/imageops/psImageGeomManip.c	(revision 6806)
+++ trunk/psLib/src/imageops/psImageGeomManip.c	(revision 7380)
@@ -10,6 +10,6 @@
  *  @author Ross Harman, MHPCC
  *
- *  @version $Revision: 1.23 $ $Name: not supported by cvs2svn $
- *  @date $Date: 2006-04-06 22:55:18 $
+ *  @version $Revision: 1.24 $ $Name: not supported by cvs2svn $
+ *  @date $Date: 2006-06-07 03:22:06 $
  *
  *  Copyright 2004-2005 Maui High Performance Computing Center, University of Hawaii
@@ -23,4 +23,5 @@
 #include "psImageGeomManip.h"
 
+#include "psAbort.h"
 #include "psError.h"
 #include "psImage.h"
@@ -878,2 +879,89 @@
 }
 
+
+#define FLIP_X_CASE(TYPENAME,TYPE) \
+case TYPENAME: { \
+    long numRows = input->numRows; \
+    long numCols = input->numCols; \
+    for (long i = 0; i < numRows; i++) { \
+        for (long j = 0; j < numCols; j++) { \
+            output->data.TYPE[i][j] = input->data.TYPE[i][numCols - j - 1]; \
+        } \
+    } \
+    break; \
+}
+
+#define FLIP_Y_CASE(TYPENAME,TYPE) \
+case TYPENAME: { \
+    long numRows = input->numRows; \
+    long numCols = input->numCols; \
+    for (long i = 0; i < numRows; i++) { \
+        for (long j = 0; j < numCols; j++) { \
+            output->data.TYPE[i][j] = input->data.TYPE[numRows - i - 1][j]; \
+        } \
+    } \
+    break; \
+}
+
+psImage *psImageFlip(psImage *output, const psImage *input, bool xFlip, bool yFlip)
+{
+    PS_ASSERT_IMAGE_NON_NULL(input, NULL);
+
+    if (xFlip && yFlip) {
+        // This is equivalent to a 180 degree rotation;
+        return psImageRotate(output, input, M_PI, NAN, PS_INTERPOLATE_BILINEAR);
+    }
+
+    if (!xFlip && !yFlip) {
+        // They want something, so let's give it to them
+        return psImageCopy(output, input, input->type.type);
+    }
+
+    output = psImageRecycle(output, input->numCols, input->numRows, input->type.type);
+
+    if (xFlip) {
+        switch (input->type.type) {
+            FLIP_X_CASE(PS_TYPE_U8,  U8);
+            FLIP_X_CASE(PS_TYPE_U16, U16);
+            FLIP_X_CASE(PS_TYPE_U32, U32);
+            FLIP_X_CASE(PS_TYPE_U64, U64);
+            FLIP_X_CASE(PS_TYPE_S8,  S8);
+            FLIP_X_CASE(PS_TYPE_S16, S16);
+            FLIP_X_CASE(PS_TYPE_S32, S32);
+            FLIP_X_CASE(PS_TYPE_S64, S64);
+            FLIP_X_CASE(PS_TYPE_F32, F32);
+            FLIP_X_CASE(PS_TYPE_F64, F64);
+            FLIP_X_CASE(PS_TYPE_C32, C32);
+            FLIP_X_CASE(PS_TYPE_C64, C64);
+        default:
+            psFree(output);
+            psError(PS_ERR_BAD_PARAMETER_TYPE, true, "Unknown type for input image: %x\n", input->type.type);
+            return NULL;
+        }
+        return output;
+    }
+    if (yFlip) {
+        switch (input->type.type) {
+            FLIP_Y_CASE(PS_TYPE_U8,  U8);
+            FLIP_Y_CASE(PS_TYPE_U16, U16);
+            FLIP_Y_CASE(PS_TYPE_U32, U32);
+            FLIP_Y_CASE(PS_TYPE_U64, U64);
+            FLIP_Y_CASE(PS_TYPE_S8,  S8);
+            FLIP_Y_CASE(PS_TYPE_S16, S16);
+            FLIP_Y_CASE(PS_TYPE_S32, S32);
+            FLIP_Y_CASE(PS_TYPE_S64, S64);
+            FLIP_Y_CASE(PS_TYPE_F32, F32);
+            FLIP_Y_CASE(PS_TYPE_F64, F64);
+            FLIP_Y_CASE(PS_TYPE_C32, C32);
+            FLIP_Y_CASE(PS_TYPE_C64, C64);
+        default:
+            psFree(output);
+            psError(PS_ERR_BAD_PARAMETER_TYPE, true, "Unknown type for input image: %x\n", input->type.type);
+            return NULL;
+        }
+        return output;
+    }
+
+    psAbort(__func__, "Should never get here.\n");
+    return NULL;
+}