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Merge pull request #1625 from nextcloud/artonge/add/blurhash
Add kornrunner/blurhash
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -1851,6 +1851,57 @@ | |
| }, | ||
| "install-path": "../justinrainbow/json-schema" | ||
| }, | ||
| { | ||
| "name": "kornrunner/blurhash", | ||
| "version": "v1.2.2", | ||
| "version_normalized": "1.2.2.0", | ||
| "source": { | ||
| "type": "git", | ||
| "url": "https://github.com/kornrunner/php-blurhash.git", | ||
| "reference": "bc8a4596cb0a49874f0158696a382ab3933fefe4" | ||
| }, | ||
| "dist": { | ||
| "type": "zip", | ||
| "url": "https://api.github.com/repos/kornrunner/php-blurhash/zipball/bc8a4596cb0a49874f0158696a382ab3933fefe4", | ||
| "reference": "bc8a4596cb0a49874f0158696a382ab3933fefe4", | ||
| "shasum": "" | ||
| }, | ||
| "require": { | ||
| "php": "^7.3|^8.0" | ||
| }, | ||
| "require-dev": { | ||
| "ext-gd": "*", | ||
| "ocramius/package-versions": "^1.4|^2.0", | ||
| "phpstan/phpstan": "^0.12", | ||
| "phpunit/phpunit": "^9", | ||
| "vimeo/psalm": "^4.3" | ||
| }, | ||
| "time": "2022-07-13T19:38:39+00:00", | ||
| "type": "library", | ||
| "installation-source": "dist", | ||
| "autoload": { | ||
| "psr-4": { | ||
| "kornrunner\\Blurhash\\": "src" | ||
| } | ||
| }, | ||
| "notification-url": "https://packagist.org/downloads/", | ||
| "license": [ | ||
| "MIT" | ||
| ], | ||
| "authors": [ | ||
| { | ||
| "name": "Boris Momčilović", | ||
| "email": "[email protected]" | ||
| } | ||
| ], | ||
| "description": "Pure PHP implementation of Blurhash", | ||
| "homepage": "https://github.com/kornrunner/php-blurhash", | ||
| "support": { | ||
| "issues": "https://github.com/kornrunner/php-blurhash/issues", | ||
| "source": "https://github.com/kornrunner/php-blurhash.git" | ||
| }, | ||
| "install-path": "../kornrunner/blurhash" | ||
| }, | ||
| { | ||
| "name": "laravel/serializable-closure", | ||
| "version": "v1.2.2", | ||
|
|
||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,21 @@ | ||
| MIT License | ||
|
|
||
| Copyright (c) 2019 Boris Momčilović | ||
|
|
||
| Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| of this software and associated documentation files (the "Software"), to deal | ||
| in the Software without restriction, including without limitation the rights | ||
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| copies of the Software, and to permit persons to whom the Software is | ||
| furnished to do so, subject to the following conditions: | ||
|
|
||
| The above copyright notice and this permission notice shall be included in all | ||
| copies or substantial portions of the Software. | ||
|
|
||
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| SOFTWARE. |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,34 @@ | ||
| <?php | ||
|
|
||
| namespace kornrunner\Blurhash; | ||
|
|
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| final class AC { | ||
|
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| public static function encode(array $value, float $max_value): float { | ||
| $quant_r = static::quantise($value[0] / $max_value); | ||
| $quant_g = static::quantise($value[1] / $max_value); | ||
| $quant_b = static::quantise($value[2] / $max_value); | ||
| return $quant_r * 19 * 19 + $quant_g * 19 + $quant_b; | ||
| } | ||
|
|
||
| public static function decode(int $value, float $max_value): array { | ||
| $quant_r = intdiv($value, 19 * 19); | ||
| $quant_g = intdiv($value, 19) % 19; | ||
| $quant_b = $value % 19; | ||
|
|
||
| return [ | ||
| static::signPow(($quant_r - 9) / 9, 2) * $max_value, | ||
| static::signPow(($quant_g - 9) / 9, 2) * $max_value, | ||
| static::signPow(($quant_b - 9) / 9, 2) * $max_value | ||
| ]; | ||
| } | ||
|
|
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| private static function quantise(float $value): float { | ||
| return floor(max(0, min(18, floor(static::signPow($value, 0.5) * 9 + 9.5)))); | ||
| } | ||
|
|
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| private static function signPow(float $base, float $exp): float { | ||
| $sign = $base <=> 0; | ||
| return $sign * pow(abs($base), $exp); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,39 @@ | ||
| <?php | ||
|
|
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| namespace kornrunner\Blurhash; | ||
|
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| use InvalidArgumentException; | ||
|
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| class Base83 { | ||
| private const ALPHABET = [ | ||
| '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', | ||
| 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', | ||
| 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', | ||
| 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', | ||
| 'u', 'v', 'w', 'x', 'y', 'z', '#', '$', '%', '*', '+', ',', '-', '.', | ||
| ':', ';', '=', '?', '@', '[', ']', '^', '_', '{', '|', '}', '~' | ||
| ]; | ||
|
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| private const BASE = 83; | ||
|
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| public static function encode(int $value, int $length): string { | ||
| if (intdiv($value, self::BASE ** $length) != 0) { | ||
| throw new InvalidArgumentException('Specified length is too short to encode given value.'); | ||
| } | ||
|
|
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| $result = ''; | ||
| for ($i = 1; $i <= $length; $i++) { | ||
| $digit = intdiv($value, self::BASE ** ($length - $i)) % self::BASE; | ||
| $result .= self::ALPHABET[$digit]; | ||
| } | ||
| return $result; | ||
| } | ||
|
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| public static function decode(string $hash): int { | ||
| $result = 0; | ||
| foreach (str_split($hash) as $char) { | ||
| $result = $result * self::BASE + (int) array_search($char, self::ALPHABET, true); | ||
| } | ||
| return $result; | ||
| } | ||
| } |
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