Added OpenCL support to box-min

1 files changed, 49 insertions, 0 deletions

diff --git a/opencl/box-min.cl b/opencl/box-min.cl
new file mode 100644
index 00000000..f0978de6
--- /dev/null
+++ b/opencl/box-min.cl
@@ -0,0 +1,49 @@
+__kernel void kernel_min_hor (__global const float4     *in,
+                              __global       float4     *aux,
+                              int width, int radius)
+{
+  const int in_index = get_global_id(0) * (width + 2 * radius)
+                       + (radius + get_global_id (1));
+
+  const int aux_index = get_global_id(0) * width + get_global_id (1);
+  int i;
+  float4 min;
+  float4 in_v;
+
+  min = (float4)(1000000000.0f);
+
+  if (get_global_id(1) < width)
+    {
+      for (i=-radius; i <= radius; i++)
+        {
+          in_v = in[in_index + i];
+          min = min > in_v ? in_v : min;
+        }
+        aux[aux_index] = min;
+    }
+}
+
+__kernel void kernel_max_ver (__global const float4     *aux,
+                              __global       float4     *out,
+                              int width, int radius)
+{
+
+  const int out_index = get_global_id(0) * width + get_global_id (1);
+  int aux_index = out_index;
+  int i;
+  float4 min;
+  float4 aux_v;
+
+  min = (float4)(1000000000.0f);
+
+  if(get_global_id(1) < width)
+    {
+      for (i=-radius; i <= radius; i++)
+        {
+          aux_v = aux[aux_index];
+          min = min > aux_v ? aux_v : min;
+          aux_index += width;
+        }
+        out[out_index] = min;
+    }
+}