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https://git.eden-emu.dev/eden-emu/eden
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9b18d0b111
Signed-off-by: lizzie <lizzie@eden-emu.dev> Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3998 Reviewed-by: crueter <crueter@eden-emu.dev> Reviewed-by: MaranBr <maranbr@eden-emu.dev>
40 lines
1.2 KiB
Perl
Executable file
40 lines
1.2 KiB
Perl
Executable file
#!/usr/bin/env perl
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# SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
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# SPDX-License-Identifier: GPL-3.0-or-later
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use strict;
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use warnings;
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sub generate_lanczos {
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my $pi = 3.14159265358979;
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sub sinc {
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if ($_[0] eq 0.0) {
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return 1.0;
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} else {
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return sin($pi * $_[0]) / ($pi * $_[0]);
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}
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}
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sub lanczos {
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my $d = sqrt($_[0] * $_[0] + $_[1] * $_[1]);
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return sinc($d) / sinc($d / $_[2]);
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}
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my $r = 3.0; #radius (1 = 3 steps)
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my $k_size = ($r * 2.0 + 1.0) * ($r * 2.0 + 1.0);
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my $w_sum = \0.0;
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my $factor = 1.0 / ($r + 1.0);
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#kernel size = (r * 2 + 1) ^ 2
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printf("const float w_kernel[%i] = float[] (\n ", $k_size);
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for (my $x = -$r; $x <= $r; $x++) {
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for (my $y = -$r; $y <= $r; $y++) {
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my $w = lanczos($x, $y, $r);
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printf("%f, ", $w);
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$w_sum += $w;
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}
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}
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printf("\n);\nconst vec2 w_pos[%i] = vec[](\n ", $k_size);
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for (my $x = -$r; $x <= $r; $x++) {
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for (my $y = -$r; $y <= $r; $y++) {
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printf("vec2(%f, %f), ", $x * $factor, $y * $factor);
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}
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}
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printf("\n);\nconst float w_sum = %f;\n", $w_sum);
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}
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generate_lanczos;
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