mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2026-05-09 12:32:56 +02:00
Lynne
77 lines
2.5 KiB
GLSL
77 lines
2.5 KiB
GLSL
/*
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* Copyright (c) 2026 Lynne <dev@lynne.ee>
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*
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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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#pragma shader_stage(compute)
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#extension GL_EXT_shader_image_load_formatted : require
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#extension GL_EXT_scalar_block_layout : require
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#extension GL_EXT_nonuniform_qualifier : require
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layout (local_size_x_id = 253, local_size_y_id = 254, local_size_z_id = 255) in;
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layout (set = 0, binding = 0) uniform sampler2D input_img[];
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layout (set = 0, binding = 1) uniform writeonly image2D output_img[];
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layout (push_constant, scalar) uniform pushConstants {
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vec2 dist;
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bool single_plane;
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};
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void distort_rgba(ivec2 pos, ivec2 size)
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{
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const vec2 p = ((vec2(pos)/vec2(size)) - 0.5f)*2.0f;
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const vec2 o = p * (dist - 1.0f);
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vec4 res;
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res.r = texture(input_img[0], ((p - o)/2.0f) + 0.5f).r;
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res.g = texture(input_img[0], ((p )/2.0f) + 0.5f).g;
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res.b = texture(input_img[0], ((p + o)/2.0f) + 0.5f).b;
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res.a = texture(input_img[0], ((p )/2.0f) + 0.5f).a;
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imageStore(output_img[0], pos, res);
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}
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void distort_plane(ivec2 pos, ivec2 size)
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{
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vec2 p = ((vec2(pos)/vec2(size)) - 0.5f)*2.0f;
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float d = sqrt(p.x*p.x + p.y*p.y);
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p *= d / (d*dist);
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vec4 res = texture(input_img[nonuniformEXT(gl_WorkGroupID.z)], (p/2.0f) + 0.5f);
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imageStore(output_img[nonuniformEXT(gl_WorkGroupID.z)], pos, res);
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}
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void main()
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{
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ivec2 pos = ivec2(gl_GlobalInvocationID.xy);
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ivec2 size = imageSize(output_img[nonuniformEXT(gl_WorkGroupID.z)]);
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if (any(greaterThanEqual(pos, size)))
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return;
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if (single_plane) {
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distort_rgba(pos, pos);
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} else {
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vec2 npos = vec2(pos)/vec2(size);
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vec4 res = texture(input_img[0], npos);
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if (gl_WorkGroupID.z == 0)
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imageStore(output_img[0], pos, res);
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else
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distort_plane(pos, size);
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}
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}
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