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static const char* red_eye_removal_cl_source =
"/* This file is an image processing operation for GEGL \n"
" * \n"
" * GEGL is free software; you can redistribute it and/or \n"
" * modify it under the terms of the GNU Lesser General Public \n"
" * License as published by the Free Software Foundation; either \n"
" * version 3 of the License, or (at your option) any later version. \n"
" * \n"
" * GEGL is distributed in the hope that it will be useful, \n"
" * but WITHOUT ANY WARRANTY; without even the implied warranty of \n"
" * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU \n"
" * Lesser General Public License for more details. \n"
" * \n"
" * You should have received a copy of the GNU Lesser General Public \n"
" * License along with GEGL; if not, see <http://www.gnu.org/licenses/>. \n"
" * \n"
" * Copyright 2013 Carlos Zubieta <czubieta.dev@gmail.com> \n"
" */ \n"
" \n"
"#define RED_FACTOR 0.5133333f \n"
"#define GREEN_FACTOR 1 \n"
"#define BLUE_FACTOR 0.1933333f \n"
" \n"
"__kernel void cl_red_eye_removal(__global const float4 *in, \n"
" __global float4 *out, \n"
" float threshold) \n"
"{ \n"
" int gid = get_global_id(0); \n"
" float4 in_v = in[gid]; \n"
" float adjusted_red = in_v.x * RED_FACTOR; \n"
" float adjusted_green = in_v.y * GREEN_FACTOR; \n"
" float adjusted_blue = in_v.z * BLUE_FACTOR; \n"
" float adjusted_threshold = (threshold - 0.4f) * 2; \n"
" float tmp; \n"
" \n"
" if (adjusted_red >= adjusted_green - adjusted_threshold && \n"
" adjusted_red >= adjusted_blue - adjusted_threshold) \n"
" { \n"
" tmp = (adjusted_green + adjusted_blue) / (2.0f * RED_FACTOR); \n"
" in_v.x = clamp(tmp, 0.0f, 1.0f); \n"
" } \n"
" out[gid] = in_v; \n"
"} \n"
;
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