From 0034155495b8a4e58b6f6f32becae974bceaa48c Mon Sep 17 00:00:00 2001
From: tradke <tradke@eff87b29-5268-4891-90a3-a07138403961>
Date: Fri, 19 Apr 2002 08:19:25 +0000
Subject: Bugfix for multiple processor runs. The reduction wasn't called as a
 global operation so the simulation got stuck.

git-svn-id: http://svn.cactuscode.org/arrangements/CactusIO/IOJpeg/trunk@60 eff87b29-5268-4891-90a3-a07138403961
---
 src/Write.c | 56 +++++++++++++++++++++++++++++---------------------------
 1 file changed, 29 insertions(+), 27 deletions(-)

diff --git a/src/Write.c b/src/Write.c
index 64d1928..f4a15db 100644
--- a/src/Write.c
+++ b/src/Write.c
@@ -27,7 +27,8 @@ CCTK_FILEVERSION(CactusIO_IOJpeg_Write_c)
  ********************    Internal Routines   ************************
  ********************************************************************/
 static void WriteData (const cGH *GH, int vindex, const char *alias, int dim,
-                       int dir, const CCTK_INT hsize[2], const void *hdata);
+                       int dir, CCTK_REAL min, CCTK_REAL max,
+                       const CCTK_INT hsize[2], const void *hdata);
 
 
 /*@@
@@ -79,7 +80,14 @@ int IOJpeg_Write (const cGH *GH, CCTK_INT vindex, const char *alias)
   CCTK_INT mapping;
   CCTK_INT origin[3], extent[3], direction[6], hsize[2];
   void *hdata;
+  CCTK_REAL min, max;
   const CCTK_INT htype = CCTK_VARIABLE_REAL;
+  /*** FIXME: can CCTK_Reduce() have a 'const cGH *' parameter ?? ***/
+  union
+  {
+    const cGH *const_ptr;
+    cGH *non_const_ptr;
+  } GH_fake_const;
   DECLARE_CCTK_PARAMETERS
 
 
@@ -101,6 +109,23 @@ int IOJpeg_Write (const cGH *GH, CCTK_INT vindex, const char *alias)
   myproc = CCTK_MyProc (GH);
   myGH = (ioJpegGH *) CCTK_GHExtension (GH, "IOJpeg");
 
+  /* set the minimum/maximum for the colormap */
+  if (CCTK_Equals (colormap, "custom"))
+  {
+    min = colormap_min;
+    max = colormap_max;
+  }
+  else
+  {
+    GH_fake_const.const_ptr = GH;
+    i = CCTK_ReductionHandle ("minimum");
+    CCTK_Reduce (GH_fake_const.non_const_ptr, 0, i, 1, CCTK_VARIABLE_REAL,
+                 &min, 1, vindex);
+    i = CCTK_ReductionHandle ("maximum");
+    CCTK_Reduce (GH_fake_const.non_const_ptr, 0, i, 1, CCTK_VARIABLE_REAL,
+                 &max, 1, vindex);
+  }
+
   /* get the number of slices to output */
   /* in general: maxdir = gdata.dim * (gdata.dim - 1) / 2; */
   maxdir = gdata.dim == 2 ? 1 : 3;
@@ -186,7 +211,7 @@ int IOJpeg_Write (const cGH *GH, CCTK_INT vindex, const char *alias)
     {
       if (i == 1)
       {
-        WriteData (GH, vindex, alias, gdata.dim, dir, hsize, hdata);
+        WriteData (GH, vindex, alias, gdata.dim, dir, min, max, hsize, hdata);
       }
 
       /* clean up */
@@ -212,44 +237,21 @@ int IOJpeg_Write (const cGH *GH, CCTK_INT vindex, const char *alias)
    @enddesc
  @@*/
 static void WriteData (const cGH *GH, int vindex, const char *alias, int dim,
-                       int dir, const CCTK_INT hsize[2], const void *hdata)
+                       int dir, CCTK_REAL min, CCTK_REAL max,
+                       const CCTK_INT hsize[2], const void *hdata)
 {
   FILE *file;
-  CCTK_REAL min, max;
-  int reduction_handle;
   unsigned char *dataout;
   ioJpegGH *myGH;
   ioAdvertisedFileDesc advertised_file;
   char *filename, *fullname;
   char slicename[30];
   const char *extensions[] = {"xy", "xz", "yz"};
-  /*** FIXME: can CCTK_Reduce() have a 'const cGH *' parameter ?? ***/
-  union
-  {
-    const cGH *const_ptr;
-    cGH *non_const_ptr;
-  } GH_fake_const;
   DECLARE_CCTK_PARAMETERS
 
 
-  GH_fake_const.const_ptr = GH;
   myGH = (ioJpegGH *) CCTK_GHExtension (GH, "IOJpeg");
 
-  if (CCTK_Equals (colormap, "custom"))
-  {
-    min = colormap_min;
-    max = colormap_max;
-  }
-  else
-  {
-    reduction_handle = CCTK_ReductionHandle ("minimum");
-    CCTK_Reduce (GH_fake_const.non_const_ptr, 0, reduction_handle, 1,
-                 CCTK_VARIABLE_REAL, &min, 1, vindex);
-    reduction_handle = CCTK_ReductionHandle ("maximum");
-    CCTK_Reduce (GH_fake_const.non_const_ptr, 0, reduction_handle, 1,
-                 CCTK_VARIABLE_REAL, &max, 1, vindex);
-  }
-
   /* allocate the RGB image buffer */
   dataout = (unsigned char *) malloc (3 * hsize[0] * hsize[1]);
 
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