[gegl] Clean up get_bounding_box for composer/composer3

[Daniel Sabo <daniels src gnome org>]

commit 91ac0e40a676683a2e7ed16c37c90b8db26c35d4
Author: Daniel Sabo <DanielSabo gmail com>
Date:   Mon Feb 10 11:02:32 2014 -0800

    Clean up get_bounding_box for composer/composer3
    
    It is safe to write to one of the inputs of gegl_rectangle_bounding_box
    so the deep if chain is unnecessary.

 gegl/operation/gegl-operation-composer.c  |   18 ++++-----------
 gegl/operation/gegl-operation-composer3.c |   34 +++++++---------------------
 2 files changed, 14 insertions(+), 38 deletions(-)
---
diff --git a/gegl/operation/gegl-operation-composer.c b/gegl/operation/gegl-operation-composer.c
index 766edf4..739e914 100644
--- a/gegl/operation/gegl-operation-composer.c
+++ b/gegl/operation/gegl-operation-composer.c
@@ -147,20 +147,12 @@ get_bounding_box (GeglOperation *self)
   GeglRectangle *in_rect  = gegl_operation_source_get_bounding_box (self, "input");
   GeglRectangle *aux_rect = gegl_operation_source_get_bounding_box (self, "aux");
 
-  if (!in_rect)
-    {
-      if (aux_rect)
-        return *aux_rect;
-      return result;
-    }
+  if (in_rect)
+    result = *in_rect;
+
   if (aux_rect)
-    {
-      gegl_rectangle_bounding_box (&result, in_rect, aux_rect);
-    }
-  else
-    {
-      return *in_rect;
-    }
+    gegl_rectangle_bounding_box (&result, &result, aux_rect);
+
   return result;
 }
 
diff --git a/gegl/operation/gegl-operation-composer3.c b/gegl/operation/gegl-operation-composer3.c
index 0fbf64b..339c813 100644
--- a/gegl/operation/gegl-operation-composer3.c
+++ b/gegl/operation/gegl-operation-composer3.c
@@ -163,31 +163,15 @@ get_bounding_box (GeglOperation *self)
   GeglRectangle *aux_rect  = gegl_operation_source_get_bounding_box (self, "aux");
   GeglRectangle *aux2_rect = gegl_operation_source_get_bounding_box (self, "aux2");
 
-  if (!in_rect)
-    if (!aux_rect)
-      if (!aux2_rect)
-        return result;
-      else
-        return *aux2_rect;
-    else
-      if (!aux2_rect)
-        return *aux_rect;
-      else
-        gegl_rectangle_bounding_box (&result, aux_rect, aux2_rect);
-  else
-    if (!aux_rect)
-      if (!aux2_rect)
-        return *in_rect;
-      else
-        gegl_rectangle_bounding_box (&result, in_rect, aux2_rect);
-    else
-      if (!aux2_rect)
-        gegl_rectangle_bounding_box (&result, in_rect, aux_rect);
-      else
-        {
-          gegl_rectangle_bounding_box (&result, in_rect, aux_rect);
-          gegl_rectangle_bounding_box (&result, &result,  aux2_rect);
-        }
+  if (in_rect)
+    result = *in_rect;
+
+  if (aux_rect)
+    gegl_rectangle_bounding_box (&result, &result, aux_rect);
+
+  if (aux2_rect)
+    gegl_rectangle_bounding_box (&result, &result, aux2_rect);
+
   return result;
 }