| /* |
| * 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); |
| } |