[gegl] opencl: fix alignment issue for aux of shadows-highlights

[Øyvind Kolås <ok src gnome org>]

commit abbbd25f13f0f7e21333d78179fa655ec15eaaf4
Author: Øyvind Kolås <pippin gimp org>
Date:   Thu Nov 9 12:28:07 2017 +0100

    opencl: fix alignment issue for aux of shadows-highlights
    
    Fix following observations by Massimo in bug #789554.

 opencl/shadows-highlights-correction.cl   |    6 +++---
 opencl/shadows-highlights-correction.cl.h |    4 ++--
 2 files changed, 5 insertions(+), 5 deletions(-)
---
diff --git a/opencl/shadows-highlights-correction.cl b/opencl/shadows-highlights-correction.cl
index 88f35f0..72d6464 100644
--- a/opencl/shadows-highlights-correction.cl
+++ b/opencl/shadows-highlights-correction.cl
@@ -40,7 +40,7 @@ float3 overlay(const float3 in_a,
 
 
 __kernel void shadows_highlights(__global const float4  *in,
-                                 __global const float3  *aux,
+                                 __global const float   *aux,
                                  __global       float4  *out,
                                           const float    shadows,
                                           const float    highlights,
@@ -63,7 +63,7 @@ __kernel void shadows_highlights(__global const float4  *in,
     }
 
   /* blurred, inverted and desaturaed mask in m */
-  m.x = 100.0f - aux[gid].x;
+  m.x = 100.0f - aux[3 * gid].x;
 
   /* white point adjustment */
   io.x = io.x > 0.0f ? io.x/whitepoint : io.x;
@@ -78,4 +78,4 @@ __kernel void shadows_highlights(__global const float4  *in,
   io.xyz = overlay(io.xyz, m, shadows, xform, shadows_ccorrect, low_approximation);
 
   out[gid] = io;
-}
\ No newline at end of file
+}
diff --git a/opencl/shadows-highlights-correction.cl.h b/opencl/shadows-highlights-correction.cl.h
index 11cf477..1950707 100644
--- a/opencl/shadows-highlights-correction.cl.h
+++ b/opencl/shadows-highlights-correction.cl.h
@@ -41,7 +41,7 @@ static const char* shadows_highlights_correction_cl_source =
 "                                                                              \n"
 "                                                                              \n"
 "__kernel void shadows_highlights(__global const float4  *in,                  \n"
-"                                 __global const float3  *aux,                 \n"
+"                                 __global const float   *aux,                 \n"
 "                                 __global       float4  *out,                 \n"
 "                                          const float    shadows,             \n"
 "                                          const float    highlights,          \n"
@@ -64,7 +64,7 @@ static const char* shadows_highlights_correction_cl_source =
 "    }                                                                         \n"
 "                                                                              \n"
 "  /* blurred, inverted and desaturaed mask in m */                            \n"
-"  m.x = 100.0f - aux[gid].x;                                                  \n"
+"  m.x = 100.0f - aux[3 * gid].x;                                              \n"
 "                                                                              \n"
 "  /* white point adjustment */                                                \n"
 "  io.x = io.x > 0.0f ? io.x/whitepoint : io.x;                                \n"