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![Jarek Samic](/assets/img/avatar_default.png)
This is a direct port of the CPU filter. Signed-off-by: Jarek Samic <cldfire3@gmail.com> Signed-off-by: Mark Thompson <sw@jkqxz.net>
50 lines
1.7 KiB
Common Lisp
50 lines
1.7 KiB
Common Lisp
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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const sampler_t sampler = CLK_NORMALIZED_COORDS_FALSE |
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CLK_FILTER_NEAREST;
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__kernel void colorkey_blend(
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__read_only image2d_t src,
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__write_only image2d_t dst,
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float4 colorkey_rgba,
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float similarity,
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float blend
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) {
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int2 loc = (int2)(get_global_id(0), get_global_id(1));
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float4 pixel = read_imagef(src, sampler, loc);
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float diff = distance(pixel.xyz, colorkey_rgba.xyz);
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pixel.s3 = clamp((diff - similarity) / blend, 0.0f, 1.0f);
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write_imagef(dst, loc, pixel);
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}
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__kernel void colorkey(
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__read_only image2d_t src,
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__write_only image2d_t dst,
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float4 colorkey_rgba,
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float similarity
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) {
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int2 loc = (int2)(get_global_id(0), get_global_id(1));
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float4 pixel = read_imagef(src, sampler, loc);
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float diff = distance(pixel.xyz, colorkey_rgba.xyz);
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pixel.s3 = (diff > similarity) ? 1.0f : 0.0f;
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write_imagef(dst, loc, pixel);
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}
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