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__kernel void kernel_max_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 max;
float4 in_v;
max = (float4)(-1000000000.0f);
if (get_global_id(1) < width)
{
for (i=-radius; i <= radius; i++)
{
in_v = in[in_index + i];
max = max < in_v ? in_v : max;
}
aux[aux_index] = max;
}
}
__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 max;
float4 aux_v;
max = (float4)(-1000000000.0f);
if(get_global_id(1) < width)
{
for (i=-radius; i <= radius; i++)
{
aux_v = aux[aux_index];
max = max < aux_v ? aux_v : max;
aux_index += width;
}
out[out_index] = max;
}
}
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