From a07e23927d9937d76c8858968c8e6b2eda33d130 Mon Sep 17 00:00:00 2001
From: People doing a 16 bpc version of gimp <film@src.gnome.org>
Date: Mon, 15 Dec 1997 00:21:15 +0000
Subject: [PATCH] fixed div-by-zero when using custom gradients with offset 100
   rayl@netrover.com

---
 app/blend.c                   | 6 ++++++
 app/core/gimpdrawable-blend.c | 6 ++++++
 app/tools/blend.c             | 6 ++++++
 app/tools/gimpblendtool.c     | 6 ++++++
 4 files changed, 24 insertions(+)

diff --git a/app/blend.c b/app/blend.c
index 3edfcd5346..b593fef545 100644
--- a/app/blend.c
+++ b/app/blend.c
@@ -891,6 +891,8 @@ gradient_calc_square_factor (double dist,
 
       if (rat < offset)
 	rat = 0.0;
+      else if (offset == 1)
+        rat = (rat>=1) ? 1 : 0;
       else
 	rat = (rat - offset) / (1.0 - offset);
     } /* else */
@@ -923,6 +925,8 @@ gradient_calc_radial_factor (double dist,
 
       if (rat < offset)
 	rat = 0.0;
+      else if (offset == 1)
+        rat = (rat>=1) ? 1 : 0;
       else
 	rat = (rat - offset) / (1.0 - offset);
     } /* else */
@@ -979,6 +983,8 @@ gradient_calc_bilinear_factor (double  dist,
 
       if (fabs(rat) < offset)
 	rat = 0.0;
+      else if (offset == 1)
+        rat = (rat>=1) ? 1 : 0;
       else
 	rat = (fabs(rat) - offset) / (1.0 - offset);
     } /* else */
diff --git a/app/core/gimpdrawable-blend.c b/app/core/gimpdrawable-blend.c
index 3edfcd5346..b593fef545 100644
--- a/app/core/gimpdrawable-blend.c
+++ b/app/core/gimpdrawable-blend.c
@@ -891,6 +891,8 @@ gradient_calc_square_factor (double dist,
 
       if (rat < offset)
 	rat = 0.0;
+      else if (offset == 1)
+        rat = (rat>=1) ? 1 : 0;
       else
 	rat = (rat - offset) / (1.0 - offset);
     } /* else */
@@ -923,6 +925,8 @@ gradient_calc_radial_factor (double dist,
 
       if (rat < offset)
 	rat = 0.0;
+      else if (offset == 1)
+        rat = (rat>=1) ? 1 : 0;
       else
 	rat = (rat - offset) / (1.0 - offset);
     } /* else */
@@ -979,6 +983,8 @@ gradient_calc_bilinear_factor (double  dist,
 
       if (fabs(rat) < offset)
 	rat = 0.0;
+      else if (offset == 1)
+        rat = (rat>=1) ? 1 : 0;
       else
 	rat = (fabs(rat) - offset) / (1.0 - offset);
     } /* else */
diff --git a/app/tools/blend.c b/app/tools/blend.c
index 3edfcd5346..b593fef545 100644
--- a/app/tools/blend.c
+++ b/app/tools/blend.c
@@ -891,6 +891,8 @@ gradient_calc_square_factor (double dist,
 
       if (rat < offset)
 	rat = 0.0;
+      else if (offset == 1)
+        rat = (rat>=1) ? 1 : 0;
       else
 	rat = (rat - offset) / (1.0 - offset);
     } /* else */
@@ -923,6 +925,8 @@ gradient_calc_radial_factor (double dist,
 
       if (rat < offset)
 	rat = 0.0;
+      else if (offset == 1)
+        rat = (rat>=1) ? 1 : 0;
       else
 	rat = (rat - offset) / (1.0 - offset);
     } /* else */
@@ -979,6 +983,8 @@ gradient_calc_bilinear_factor (double  dist,
 
       if (fabs(rat) < offset)
 	rat = 0.0;
+      else if (offset == 1)
+        rat = (rat>=1) ? 1 : 0;
       else
 	rat = (fabs(rat) - offset) / (1.0 - offset);
     } /* else */
diff --git a/app/tools/gimpblendtool.c b/app/tools/gimpblendtool.c
index 3edfcd5346..b593fef545 100644
--- a/app/tools/gimpblendtool.c
+++ b/app/tools/gimpblendtool.c
@@ -891,6 +891,8 @@ gradient_calc_square_factor (double dist,
 
       if (rat < offset)
 	rat = 0.0;
+      else if (offset == 1)
+        rat = (rat>=1) ? 1 : 0;
       else
 	rat = (rat - offset) / (1.0 - offset);
     } /* else */
@@ -923,6 +925,8 @@ gradient_calc_radial_factor (double dist,
 
       if (rat < offset)
 	rat = 0.0;
+      else if (offset == 1)
+        rat = (rat>=1) ? 1 : 0;
       else
 	rat = (rat - offset) / (1.0 - offset);
     } /* else */
@@ -979,6 +983,8 @@ gradient_calc_bilinear_factor (double  dist,
 
       if (fabs(rat) < offset)
 	rat = 0.0;
+      else if (offset == 1)
+        rat = (rat>=1) ? 1 : 0;
       else
 	rat = (fabs(rat) - offset) / (1.0 - offset);
     } /* else */