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/*
* This file is part of FFmpeg.
*
* FFmpeg 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 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
const sampler_t sampler = CLK_NORMALIZED_COORDS_FALSE |
CLK_FILTER_NEAREST;
__kernel void colorkey_blend(
__read_only image2d_t src,
__write_only image2d_t dst,
float4 colorkey_rgba,
float similarity,
float blend
) {
int2 loc = (int2)(get_global_id(0), get_global_id(1));
float4 pixel = read_imagef(src, sampler, loc);
float diff = distance(pixel.xyz, colorkey_rgba.xyz);
pixel.s3 = clamp((diff - similarity) / blend, 0.0f, 1.0f);
write_imagef(dst, loc, pixel);
}
__kernel void colorkey(
__read_only image2d_t src,
__write_only image2d_t dst,
float4 colorkey_rgba,
float similarity
) {
int2 loc = (int2)(get_global_id(0), get_global_id(1));
float4 pixel = read_imagef(src, sampler, loc);
float diff = distance(pixel.xyz, colorkey_rgba.xyz);
pixel.s3 = (diff > similarity) ? 1.0f : 0.0f;
write_imagef(dst, loc, pixel);
}
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