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/* This file is an image processing operation for GEGL
*
* GEGL is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* GEGL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with GEGL; if not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2015 Thomas Manni <thomas.manni@free.fr>
*/
__kernel void cl_color_exchange(__global const float4 *in,
__global float4 *out,
float3 color_diff,
float3 min,
float3 max)
{
int gid = get_global_id(0);
float4 in_v = in[gid];
float4 out_v;
if(in_v.x > min.x && in_v.x < max.x &&
in_v.y > min.y && in_v.y < max.y &&
in_v.z > min.z && in_v.z < max.z)
{
out_v.x = clamp(in_v.x + color_diff.x, 0.0f, 1.0f);
out_v.y = clamp(in_v.y + color_diff.y, 0.0f, 1.0f);
out_v.z = clamp(in_v.z + color_diff.z, 0.0f, 1.0f);
}
else
{
out_v.xyz = in_v.xyz;
}
out_v.w = in_v.w;
out[gid] = out_v;
}
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