gegl r2506 - in branches/branch2_zhangjb: . operations/frequency/tools

[zhangjb svn gnome org]

Author: zhangjb
Date: Sat Jun 28 02:47:21 2008
New Revision: 2506
URL: http://svn.gnome.org/viewvc/gegl?rev=2506&view=rev

Log:
Added encode/decode functions in order to support odd-size image.
* operations/frequency/tools/display.c: a small modify.
* operations/frequency/tools/fourier.c: added encode/decode functions.


Modified:
   branches/branch2_zhangjb/ChangeLog
   branches/branch2_zhangjb/operations/frequency/tools/display.c
   branches/branch2_zhangjb/operations/frequency/tools/fourier.c

Modified: branches/branch2_zhangjb/operations/frequency/tools/display.c
==============================================================================
--- branches/branch2_zhangjb/operations/frequency/tools/display.c	(original)
+++ branches/branch2_zhangjb/operations/frequency/tools/display.c	Sat Jun 28 02:47:21 2008
@@ -103,10 +103,7 @@
 
   for (i=0; i<samples; i++)
     {
-      if (*(buf+i)<1)
-        *(buf+i) = 0;
-      else
-        *(buf+i) = log(*(buf+i));
+      *(buf+i) = log(*(buf+i)+1);
     }
   get_min_max(buf, &min, &max, samples);
   for (i=0; i<samples; i++)

Modified: branches/branch2_zhangjb/operations/frequency/tools/fourier.c
==============================================================================
--- branches/branch2_zhangjb/operations/frequency/tools/fourier.c	(original)
+++ branches/branch2_zhangjb/operations/frequency/tools/fourier.c	Sat Jun 28 02:47:21 2008
@@ -27,6 +27,8 @@
 
 gboolean dft(gdouble *src_buf, fftw_complex *dst_buf_pointer, gint width, gint height);
 gboolean idft(fftw_complex *src_buf, gdouble *dst_buf, gint width, gint height);
+gboolean encode(gdouble *, gint);
+gint decode(gdouble *);
 
 gboolean
 dft(gdouble *src_buf, fftw_complex *dst_buf, gint width, gint height)
@@ -65,3 +67,40 @@
   fftw_destroy_plan(fftplan);
   return TRUE;
 }
+
+gboolean encode(gdouble *pixelhandle, gint is_even)
+{
+  gint int_pixel = (int)(*pixelhandle);
+
+  if (is_even != 1 && is_even != 0)
+    return FALSE;
+
+  *pixelhandle -= int_pixel;
+  int_pixel = 10 * int_pixel + is_even;
+  *pixelhandle += int_pixel;
+
+  return TRUE;
+}
+
+  
+gint decode(gdouble *pixelhandle)
+{
+  gint int_pixel = (int)(*pixelhandle);
+  *pixelhandle -= int_pixel;
+  if (int_pixel == 1)
+    {
+      *pixelhandle += int_pixel/10;
+      return 1;
+    }
+  elseif (int_pixel == 9)
+    {
+      *pixelhandle += int_pixel/10 - 1;
+      return 1;
+    }
+  else
+    {
+      *pixelhandle += int_pixel/10;
+      return 0;
+    }
+}
+