Changeset 9865 for trunk/psLib/src/imageops/psImageGeomManip.c

Timestamp:

Nov 5, 2006, 4:02:59 PM (20 years ago)

Author:

magnier

Message:

added BICUBE, fixed sign error and 0.5 pixel error in psImageShift

File:

• trunk/psLib/src/imageops/psImageGeomManip.c (modified) (3 diffs)

trunk/psLib/src/imageops/psImageGeomManip.c

@@ -10 +10 @@
  *  @author Ross Harman, MHPCC
  *
- *  @version $Revision: 1.30 $ $Name: not supported by cvs2svn $
- *  @date $Date: 2006-11-06 01:58:09 $
+ *  @version $Revision: 1.31 $ $Name: not supported by cvs2svn $
+ *  @date $Date: 2006-11-06 02:02:59 $
  *
  *  Copyright 2004-2005 Maui High Performance Computing Center, University of Hawaii
@@ -636 +636 @@
         break; \
     } \
-    /* XXX output(i,j) = input(i+0.5-dx,j+0.5-dy) */ \
+    /* note: output(i,j) = input(i+0.5-dx,j+0.5-dy) */ \
+    /* positive dx,dy moves pixel i-dx,j-dy to i,y */ \
+    /* also: pixel center is 0.5,0.5 */ \
     for (psS32 row=0;row<outRows;row++) { \
         ps##TYPE* outRow = out->data.TYPE[row]; \
@@ -676 +678 @@
     break;
 
+    // EAM: added BICUBE
     switch (mode) {
         PSIMAGE_SHIFT_ARBITRARY_CASE(FLAT);