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851bbd4dae
The shader runs per output pixel but mixed input and output coordinates: cclock_flip left part of the output unwritten, clock came out mirrored and cclock/clock_flip were off by one. Read the source pixel for each output pixel instead, like the OpenCL filter.
52 lines
1.9 KiB
GLSL
52 lines
1.9 KiB
GLSL
/*
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* Copyright (c) 2021 Wu Jianhua <jianhua.wu@intel.com>
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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 readonly image2D 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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int dir;
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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_LocalInvocationID.z)]);
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if (any(greaterThanEqual(pos, size)))
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return;
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/* size is the output size, so the input is size.yx */
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ivec2 src = ivec2((dir & 2) != 0 ? size.y - 1 - pos.y : pos.y,
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(dir & 1) != 0 ? size.x - 1 - pos.x : pos.x);
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vec4 res = imageLoad(input_img[nonuniformEXT(gl_LocalInvocationID.z)], src);
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imageStore(output_img[nonuniformEXT(gl_LocalInvocationID.z)], pos, res);
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}
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