[babl] Revert "allocate temporary buffers for fish conversion on the stack"

[Ãyvind KolÃs <ok src gnome org>]

commit 70e984d454618a219a5f472915e004da623726a6
Author: Ãyvind KolÃs <pippin gimp org>
Date:   Mon Apr 23 17:58:15 2012 +0200

    Revert "allocate temporary buffers for fish conversion on the stack"
    
    This reverts commit 290ce9308f7b18f15398707e2d948f8745dd0be0.
    
    I don't think it should, but it seems like it breaks expected behavior.

 babl/babl-fish-path.c |   20 ++++++++------------
 1 files changed, 8 insertions(+), 12 deletions(-)
---
diff --git a/babl/babl-fish-path.c b/babl/babl-fish-path.c
index f51501e..7914e0c 100644
--- a/babl/babl-fish-path.c
+++ b/babl/babl-fish-path.c
@@ -410,16 +410,6 @@ babl_process (const Babl *cbabl,
   return -1;
 }
 
-#include <stdint.h>
-
-#define BABL_ALIGN 16
-static void inline *align_16 (unsigned char *ret)
-{
-  int offset = BABL_ALIGN - ((uintptr_t) ret) % BABL_ALIGN;
-  ret = ret + offset;
-  return ret;
-}
-
 static long
 process_conversion_path (BablList   *path,
                          const void *source_buffer,
@@ -437,7 +427,7 @@ process_conversion_path (BablList   *path,
     }
   else
     {
-      void *aux1_buffer = align_16 (alloca (n * sizeof (double) * 5 + 16));
+      void *aux1_buffer = babl_malloc (n * sizeof (double) * 5);
       void *aux2_buffer = NULL;
       void *swap_buffer = NULL;
       int   i;
@@ -445,7 +435,7 @@ process_conversion_path (BablList   *path,
       if (conversions > 2)
         {
           /* We'll need one more auxiliary buffer */
-          aux2_buffer = align_16 (alloca ((n * sizeof (double) * 5 + 16)));
+          aux2_buffer = babl_malloc (n * sizeof (double) * 5);
         }
 
       /* The first conversion goes from source_buffer to aux1_buffer */
@@ -473,6 +463,12 @@ process_conversion_path (BablList   *path,
                                aux1_buffer,
                                destination_buffer,
                                n);
+
+      /* Free auxiliary buffers */
+      if (aux1_buffer)
+        babl_free (aux1_buffer);
+      if (aux2_buffer)
+        babl_free (aux2_buffer);
   }
 
   return n;