From 6668b38d2c5a10410db495d25c3e23dbaf718df2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?St=C3=A9phane=20Voltz?= <stef.dev@free.fr>
Date: Mon, 19 Oct 2009 06:33:52 +0200
Subject: [PATCH] fix shading coefficient computing at dpi higher than sensor's
 one

---
 backend/genesys.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/backend/genesys.c b/backend/genesys.c
index 99ccca341..98e06ef63 100644
--- a/backend/genesys.c
+++ b/backend/genesys.c
@@ -3044,9 +3044,17 @@ genesys_send_shading_coefficient (Genesys_Device * dev)
       cmat[0] = 0;
       cmat[1] = 1;
       cmat[2] = 2;
+      if(dev->settings.xres>dev->sensor.optical_res)
+        {
+	  res=1;
+        }
+      else
+        {
+          res=dev->sensor.optical_res/dev->settings.xres;
+        }
       compute_planar_coefficients (dev,
 				   shading_data,
-				   dev->sensor.optical_res/dev->settings.xres,
+				   res,
 				   pixels_per_line,
 				   words_per_color,
 				   channels,