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Add gammaawaredither command-line tool (in Go)
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nigeltao committed Sep 6, 2022
1 parent 4279875 commit 1e8939b
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64 changes: 64 additions & 0 deletions extra/cmd/gammaawaredither/main.go
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// Copyright 2022 Nigel Tao.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package main

import (
"bytes"
"errors"
"flag"
"image"
_ "image/gif"
_ "image/jpeg"
"image/png"
"io"
"os"

"github.com/nigeltao/qoir/extra/lib/gammaawaredither"
"github.com/nigeltao/qoir/extra/lib/pnggamma"
)

var (
lossiness = flag.Int("lossiness", 4, "From 0 (lossless for 8-bit color) to 7 (very lossy)")
)

func main() {
if err := main1(); err != nil {
os.Stderr.WriteString(err.Error() + "\n")
os.Exit(1)
}
}

func main1() error {
flag.Parse()
if flag.NArg() != 0 {
return errors.New("Usage: gammaawaredither -lossiness=4 < in.png > out.png")
}
src, err := io.ReadAll(os.Stdin)
if err != nil {
return err
}
img, _, err := image.Decode(bytes.NewReader(src))
if err != nil {
return err
}
gamma, _ := pnggamma.DecodeGamma(src)
dst, err := gammaawaredither.Dither(img, *lossiness, &gammaawaredither.DitherOptions{
Gamma: gamma,
})
if err != nil {
return err
}
return png.Encode(os.Stdout, dst)
}
223 changes: 223 additions & 0 deletions extra/lib/gammaawaredither/gammaawaredither.go
Original file line number Diff line number Diff line change
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// Copyright 2022 Nigel Tao.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// Package gammaawaredither dithers images (quantizing the colors while
// avoiding large sections of flat color) in a gamma-correction aware manner so
// that the input and output images have the same perceived brightness.
package gammaawaredither

import (
"errors"
"image"
"image/color"
)

// These errors can be returned by Dither.
var (
ErrNilSrcImage = errors.New("gammaawaredither: nil src image")
ErrUnsupportedSrcImage = errors.New("gammaawaredither: unsupported src image")
)

// DitherOptions holds the optional arguments to the Dither function.
type DitherOptions struct {
// Gamma is the gamma correction value for the source image. The default
// (zero) value is equivalent to 2.2. Use 1.0 for no gamma correction.
Gamma float64
}

func (o *DitherOptions) gamma() float64 {
if (o != nil) && (o.Gamma > 0) {
return o.Gamma
}
return 2.2
}

// Dither returns a dithered version of the source image. lossiness ranges from
// 0 (lossless for 8-bit color source images, lossy for higher bit depths) to 7
// (very lossy, unconditionally), inclusive. opts may be nil, equivalent to a
// pointer to a zero-valued DitherOptions struct.
func Dither(src image.Image, lossiness int, opts *DitherOptions) (image.Image, error) {
if src == nil {
return nil, ErrNilSrcImage
}
src64, ok := src.(image.RGBA64Image)
if !ok {
return nil, ErrUnsupportedSrcImage
}
if lossiness < 0 {
lossiness = 0
} else if lossiness > 7 {
lossiness = 7
}
shift := uint32(lossiness + 8) // +8 to convert from 16-bit to 8-bit color.
unshift := &unshiftTables[lossiness]
gamma := opts.gamma()

bounds := src64.Bounds()
dst := image.NewRGBA(bounds)
for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
for x := bounds.Min.X; x < bounds.Max.X; x++ {
// TODO: Actually dither, in a gamma-aware fashion.
_ = gamma
pix := src64.RGBA64At(x, y)
dst.SetRGBA(x, y, color.RGBA{
R: unshift[uint8(pix.R>>shift)],
G: unshift[uint8(pix.G>>shift)],
B: unshift[uint8(pix.B>>shift)],
A: unshift[uint8(pix.A>>shift)],
})
}
}
return dst, nil
}

// unshift[n][x] expands the low (8 - n) bits of x to range from 0x00 to 0xFF
// inclusive, linearly.
var unshiftTables = [8][256]uint8{{
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,
0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F,
0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F,
0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F,
0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F,
0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F,
0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF,
0xB0, 0xB1, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF,
0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF,
0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF,
0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF,
}, {
0x00, 0x02, 0x04, 0x06, 0x08, 0x0A, 0x0C, 0x0E, 0x10, 0x12, 0x14, 0x16, 0x18, 0x1A, 0x1C, 0x1E,
0x20, 0x22, 0x24, 0x26, 0x28, 0x2A, 0x2C, 0x2E, 0x30, 0x32, 0x34, 0x36, 0x38, 0x3A, 0x3C, 0x3E,
0x40, 0x42, 0x44, 0x46, 0x48, 0x4A, 0x4C, 0x4E, 0x50, 0x52, 0x54, 0x56, 0x58, 0x5A, 0x5C, 0x5E,
0x60, 0x62, 0x64, 0x66, 0x68, 0x6A, 0x6C, 0x6E, 0x70, 0x72, 0x74, 0x76, 0x78, 0x7A, 0x7C, 0x7E,
0x81, 0x83, 0x85, 0x87, 0x89, 0x8B, 0x8D, 0x8F, 0x91, 0x93, 0x95, 0x97, 0x99, 0x9B, 0x9D, 0x9F,
0xA1, 0xA3, 0xA5, 0xA7, 0xA9, 0xAB, 0xAD, 0xAF, 0xB1, 0xB3, 0xB5, 0xB7, 0xB9, 0xBB, 0xBD, 0xBF,
0xC1, 0xC3, 0xC5, 0xC7, 0xC9, 0xCB, 0xCD, 0xCF, 0xD1, 0xD3, 0xD5, 0xD7, 0xD9, 0xDB, 0xDD, 0xDF,
0xE1, 0xE3, 0xE5, 0xE7, 0xE9, 0xEB, 0xED, 0xEF, 0xF1, 0xF3, 0xF5, 0xF7, 0xF9, 0xFB, 0xFD, 0xFF,
0x00, 0x02, 0x04, 0x06, 0x08, 0x0A, 0x0C, 0x0E, 0x10, 0x12, 0x14, 0x16, 0x18, 0x1A, 0x1C, 0x1E,
0x20, 0x22, 0x24, 0x26, 0x28, 0x2A, 0x2C, 0x2E, 0x30, 0x32, 0x34, 0x36, 0x38, 0x3A, 0x3C, 0x3E,
0x40, 0x42, 0x44, 0x46, 0x48, 0x4A, 0x4C, 0x4E, 0x50, 0x52, 0x54, 0x56, 0x58, 0x5A, 0x5C, 0x5E,
0x60, 0x62, 0x64, 0x66, 0x68, 0x6A, 0x6C, 0x6E, 0x70, 0x72, 0x74, 0x76, 0x78, 0x7A, 0x7C, 0x7E,
0x81, 0x83, 0x85, 0x87, 0x89, 0x8B, 0x8D, 0x8F, 0x91, 0x93, 0x95, 0x97, 0x99, 0x9B, 0x9D, 0x9F,
0xA1, 0xA3, 0xA5, 0xA7, 0xA9, 0xAB, 0xAD, 0xAF, 0xB1, 0xB3, 0xB5, 0xB7, 0xB9, 0xBB, 0xBD, 0xBF,
0xC1, 0xC3, 0xC5, 0xC7, 0xC9, 0xCB, 0xCD, 0xCF, 0xD1, 0xD3, 0xD5, 0xD7, 0xD9, 0xDB, 0xDD, 0xDF,
0xE1, 0xE3, 0xE5, 0xE7, 0xE9, 0xEB, 0xED, 0xEF, 0xF1, 0xF3, 0xF5, 0xF7, 0xF9, 0xFB, 0xFD, 0xFF,
}, {
0x00, 0x04, 0x08, 0x0C, 0x10, 0x14, 0x18, 0x1C, 0x20, 0x24, 0x28, 0x2C, 0x30, 0x34, 0x38, 0x3C,
0x41, 0x45, 0x49, 0x4D, 0x51, 0x55, 0x59, 0x5D, 0x61, 0x65, 0x69, 0x6D, 0x71, 0x75, 0x79, 0x7D,
0x82, 0x86, 0x8A, 0x8E, 0x92, 0x96, 0x9A, 0x9E, 0xA2, 0xA6, 0xAA, 0xAE, 0xB2, 0xB6, 0xBA, 0xBE,
0xC3, 0xC7, 0xCB, 0xCF, 0xD3, 0xD7, 0xDB, 0xDF, 0xE3, 0xE7, 0xEB, 0xEF, 0xF3, 0xF7, 0xFB, 0xFF,
0x00, 0x04, 0x08, 0x0C, 0x10, 0x14, 0x18, 0x1C, 0x20, 0x24, 0x28, 0x2C, 0x30, 0x34, 0x38, 0x3C,
0x41, 0x45, 0x49, 0x4D, 0x51, 0x55, 0x59, 0x5D, 0x61, 0x65, 0x69, 0x6D, 0x71, 0x75, 0x79, 0x7D,
0x82, 0x86, 0x8A, 0x8E, 0x92, 0x96, 0x9A, 0x9E, 0xA2, 0xA6, 0xAA, 0xAE, 0xB2, 0xB6, 0xBA, 0xBE,
0xC3, 0xC7, 0xCB, 0xCF, 0xD3, 0xD7, 0xDB, 0xDF, 0xE3, 0xE7, 0xEB, 0xEF, 0xF3, 0xF7, 0xFB, 0xFF,
0x00, 0x04, 0x08, 0x0C, 0x10, 0x14, 0x18, 0x1C, 0x20, 0x24, 0x28, 0x2C, 0x30, 0x34, 0x38, 0x3C,
0x41, 0x45, 0x49, 0x4D, 0x51, 0x55, 0x59, 0x5D, 0x61, 0x65, 0x69, 0x6D, 0x71, 0x75, 0x79, 0x7D,
0x82, 0x86, 0x8A, 0x8E, 0x92, 0x96, 0x9A, 0x9E, 0xA2, 0xA6, 0xAA, 0xAE, 0xB2, 0xB6, 0xBA, 0xBE,
0xC3, 0xC7, 0xCB, 0xCF, 0xD3, 0xD7, 0xDB, 0xDF, 0xE3, 0xE7, 0xEB, 0xEF, 0xF3, 0xF7, 0xFB, 0xFF,
0x00, 0x04, 0x08, 0x0C, 0x10, 0x14, 0x18, 0x1C, 0x20, 0x24, 0x28, 0x2C, 0x30, 0x34, 0x38, 0x3C,
0x41, 0x45, 0x49, 0x4D, 0x51, 0x55, 0x59, 0x5D, 0x61, 0x65, 0x69, 0x6D, 0x71, 0x75, 0x79, 0x7D,
0x82, 0x86, 0x8A, 0x8E, 0x92, 0x96, 0x9A, 0x9E, 0xA2, 0xA6, 0xAA, 0xAE, 0xB2, 0xB6, 0xBA, 0xBE,
0xC3, 0xC7, 0xCB, 0xCF, 0xD3, 0xD7, 0xDB, 0xDF, 0xE3, 0xE7, 0xEB, 0xEF, 0xF3, 0xF7, 0xFB, 0xFF,
}, {
0x00, 0x08, 0x10, 0x18, 0x21, 0x29, 0x31, 0x39, 0x42, 0x4A, 0x52, 0x5A, 0x63, 0x6B, 0x73, 0x7B,
0x84, 0x8C, 0x94, 0x9C, 0xA5, 0xAD, 0xB5, 0xBD, 0xC6, 0xCE, 0xD6, 0xDE, 0xE7, 0xEF, 0xF7, 0xFF,
0x00, 0x08, 0x10, 0x18, 0x21, 0x29, 0x31, 0x39, 0x42, 0x4A, 0x52, 0x5A, 0x63, 0x6B, 0x73, 0x7B,
0x84, 0x8C, 0x94, 0x9C, 0xA5, 0xAD, 0xB5, 0xBD, 0xC6, 0xCE, 0xD6, 0xDE, 0xE7, 0xEF, 0xF7, 0xFF,
0x00, 0x08, 0x10, 0x18, 0x21, 0x29, 0x31, 0x39, 0x42, 0x4A, 0x52, 0x5A, 0x63, 0x6B, 0x73, 0x7B,
0x84, 0x8C, 0x94, 0x9C, 0xA5, 0xAD, 0xB5, 0xBD, 0xC6, 0xCE, 0xD6, 0xDE, 0xE7, 0xEF, 0xF7, 0xFF,
0x00, 0x08, 0x10, 0x18, 0x21, 0x29, 0x31, 0x39, 0x42, 0x4A, 0x52, 0x5A, 0x63, 0x6B, 0x73, 0x7B,
0x84, 0x8C, 0x94, 0x9C, 0xA5, 0xAD, 0xB5, 0xBD, 0xC6, 0xCE, 0xD6, 0xDE, 0xE7, 0xEF, 0xF7, 0xFF,
0x00, 0x08, 0x10, 0x18, 0x21, 0x29, 0x31, 0x39, 0x42, 0x4A, 0x52, 0x5A, 0x63, 0x6B, 0x73, 0x7B,
0x84, 0x8C, 0x94, 0x9C, 0xA5, 0xAD, 0xB5, 0xBD, 0xC6, 0xCE, 0xD6, 0xDE, 0xE7, 0xEF, 0xF7, 0xFF,
0x00, 0x08, 0x10, 0x18, 0x21, 0x29, 0x31, 0x39, 0x42, 0x4A, 0x52, 0x5A, 0x63, 0x6B, 0x73, 0x7B,
0x84, 0x8C, 0x94, 0x9C, 0xA5, 0xAD, 0xB5, 0xBD, 0xC6, 0xCE, 0xD6, 0xDE, 0xE7, 0xEF, 0xF7, 0xFF,
0x00, 0x08, 0x10, 0x18, 0x21, 0x29, 0x31, 0x39, 0x42, 0x4A, 0x52, 0x5A, 0x63, 0x6B, 0x73, 0x7B,
0x84, 0x8C, 0x94, 0x9C, 0xA5, 0xAD, 0xB5, 0xBD, 0xC6, 0xCE, 0xD6, 0xDE, 0xE7, 0xEF, 0xF7, 0xFF,
0x00, 0x08, 0x10, 0x18, 0x21, 0x29, 0x31, 0x39, 0x42, 0x4A, 0x52, 0x5A, 0x63, 0x6B, 0x73, 0x7B,
0x84, 0x8C, 0x94, 0x9C, 0xA5, 0xAD, 0xB5, 0xBD, 0xC6, 0xCE, 0xD6, 0xDE, 0xE7, 0xEF, 0xF7, 0xFF,
}, {
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF,
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF,
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF,
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF,
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF,
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF,
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF,
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF,
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF,
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF,
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF,
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF,
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF,
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF,
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF,
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF,
}, {
0x00, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF, 0x00, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF,
0x00, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF, 0x00, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF,
0x00, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF, 0x00, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF,
0x00, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF, 0x00, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF,
0x00, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF, 0x00, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF,
0x00, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF, 0x00, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF,
0x00, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF, 0x00, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF,
0x00, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF, 0x00, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF,
0x00, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF, 0x00, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF,
0x00, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF, 0x00, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF,
0x00, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF, 0x00, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF,
0x00, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF, 0x00, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF,
0x00, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF, 0x00, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF,
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