From 186d7daf6ef1424d80c477dd82b4e75f76ed845a Mon Sep 17 00:00:00 2001
From: Emil Martinec <ejmartin@uchicago.edu>
Date: Wed, 24 Nov 2010 10:10:29 -0600
Subject: [PATCH] Patch to make autoexposure of thumbs and preview image agree.
  The problem was that white balance was applied to raw data for preview image
 but not for thumbs.  I sure hope all this improves with rtengine2.

---
 rtengine/dcraw.cc    | 8 ++++----
 rtengine/dcraw.patch | 8 ++++----
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/rtengine/dcraw.cc b/rtengine/dcraw.cc
index 04996e7c5..2c10b5028 100644
--- a/rtengine/dcraw.cc
+++ b/rtengine/dcraw.cc
@@ -9488,7 +9488,7 @@ t4.set ();
     tpp->aeHistogram = new unsigned int[65536>>tpp->aeHistCompression];
     memset (tpp->aeHistogram, 0, (65536>>tpp->aeHistCompression)*sizeof(int));
     int radd = 4;
-    int gadd = 2;
+    int gadd = 4;
     int badd = 4;
     if (!filter)
         radd = gadd = badd = 1;
@@ -9505,11 +9505,11 @@ t4.set ();
         }
         for (int j=start; j<end; j++) 
             if (FISGREEN(filter,i,j))
-                tpp->aeHistogram[image[i* ::width+j][1]>>tpp->aeHistCompression]+=gadd;
+                tpp->aeHistogram[CLIP((int)(tpp->camwbGreen*image[i* ::width+j][1]))>>tpp->aeHistCompression]+=gadd;
             else if (FISRED(filter,i,j))
-                tpp->aeHistogram[image[i* ::width+j][0]>>tpp->aeHistCompression]+=radd;
+                tpp->aeHistogram[CLIP((int)(tpp->camwbRed*image[i* ::width+j][0]))>>tpp->aeHistCompression]+=radd;
             else if (FISBLUE(filter,i,j))
-                tpp->aeHistogram[image[i* ::width+j][2]>>tpp->aeHistCompression]+=badd;
+                tpp->aeHistogram[CLIP((int)(tpp->camwbBlue*image[i* ::width+j][2]))>>tpp->aeHistCompression]+=badd;
     }
                 
 t5.set ();
diff --git a/rtengine/dcraw.patch b/rtengine/dcraw.patch
index 6f172437d..b759638ee 100644
--- a/rtengine/dcraw.patch
+++ b/rtengine/dcraw.patch
@@ -890,7 +890,7 @@
 +    tpp->aeHistogram = new unsigned int[65536>>tpp->aeHistCompression];
 +    memset (tpp->aeHistogram, 0, (65536>>tpp->aeHistCompression)*sizeof(int));
 +    int radd = 4;
-+    int gadd = 2;
++    int gadd = 4;
 +    int badd = 4;
 +    if (!filter)
 +        radd = gadd = badd = 1;
@@ -907,11 +907,11 @@
 +        }
 +        for (int j=start; j<end; j++) 
 +            if (FISGREEN(filter,i,j))
-+                tpp->aeHistogram[image[i* ::width+j][1]>>tpp->aeHistCompression]+=gadd;
++                tpp->aeHistogram[CLIP((int)(tpp->camwbGreen*image[i* ::width+j][1]))>>tpp->aeHistCompression]+=gadd;
 +            else if (FISRED(filter,i,j))
-+                tpp->aeHistogram[image[i* ::width+j][0]>>tpp->aeHistCompression]+=radd;
++                tpp->aeHistogram[CLIP((int)(tpp->camwbRed*image[i* ::width+j][0]))>>tpp->aeHistCompression]+=radd;
 +            else if (FISBLUE(filter,i,j))
-+                tpp->aeHistogram[image[i* ::width+j][2]>>tpp->aeHistCompression]+=badd;
++                tpp->aeHistogram[CLIP((int)(tpp->camwbBlue*image[i* ::width+j][2]))>>tpp->aeHistCompression]+=badd;
 +    }
 +                
 +t5.set ();