2 * This file is part of FFmpeg.
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 const sampler_t sampler = CLK_NORMALIZED_COORDS_FALSE |
22 __kernel void colorkey_blend(
23 __read_only image2d_t src,
24 __write_only image2d_t dst,
29 int2 loc = (int2)(get_global_id(0), get_global_id(1));
30 float4 pixel = read_imagef(src, sampler, loc);
31 float diff = distance(pixel.xyz, colorkey_rgba.xyz);
33 pixel.s3 = clamp((diff - similarity) / blend, 0.0f, 1.0f);
34 write_imagef(dst, loc, pixel);
37 __kernel void colorkey(
38 __read_only image2d_t src,
39 __write_only image2d_t dst,
43 int2 loc = (int2)(get_global_id(0), get_global_id(1));
44 float4 pixel = read_imagef(src, sampler, loc);
45 float diff = distance(pixel.xyz, colorkey_rgba.xyz);
47 pixel.s3 = (diff > similarity) ? 1.0f : 0.0f;
48 write_imagef(dst, loc, pixel);