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added ImageColor, replaces Image::rgb()
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| <?php | ||
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| /** | ||
| * This file is part of the Nette Framework (https://nette.org) | ||
| * Copyright (c) 2004 David Grudl (https://davidgrudl.com) | ||
| */ | ||
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| declare(strict_types=1); | ||
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| namespace Nette\Utils; | ||
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| use Nette; | ||
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| /** | ||
| * Represent RGB color (0..255) with opacity (0..1). | ||
| */ | ||
| class ImageColor | ||
| { | ||
| public static function rgb(int $red, int $green, int $blue, float $opacity = 1): self | ||
| { | ||
| return new self($red, $green, $blue, $opacity); | ||
| } | ||
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| /** | ||
| * Accepts formats #RRGGBB, #RRGGBBAA, #RGB, #RGBA | ||
| */ | ||
| public static function hex(string $hex): self | ||
| { | ||
| $hex = ltrim($hex, '#'); | ||
| $len = strlen($hex); | ||
| if ($len === 3 || $len === 4) { | ||
| return new self( | ||
| (int) hexdec($hex[0]) * 17, | ||
| (int) hexdec($hex[1]) * 17, | ||
| (int) hexdec($hex[2]) * 17, | ||
| (int) hexdec($hex[3] ?? 'F') * 17 / 255, | ||
| ); | ||
| } elseif ($len === 6 || $len === 8) { | ||
| return new self( | ||
| (int) hexdec($hex[0] . $hex[1]), | ||
| (int) hexdec($hex[2] . $hex[3]), | ||
| (int) hexdec($hex[4] . $hex[5]), | ||
| (int) hexdec(($hex[6] ?? 'F') . ($hex[7] ?? 'F')) / 255, | ||
| ); | ||
| } else { | ||
| throw new Nette\InvalidArgumentException('Invalid hex color format.'); | ||
| } | ||
| } | ||
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| private function __construct( | ||
| public int $red, | ||
| public int $green, | ||
| public int $blue, | ||
| public float $opacity = 1, | ||
| ) { | ||
| $this->red = max(0, min(255, $red)); | ||
| $this->green = max(0, min(255, $green)); | ||
| $this->blue = max(0, min(255, $blue)); | ||
| $this->opacity = max(0, min(1, $opacity)); | ||
| } | ||
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| public function toRGBA(): array | ||
| { | ||
| return [ | ||
| max(0, min(255, $this->red)), | ||
| max(0, min(255, $this->green)), | ||
| max(0, min(255, $this->blue)), | ||
| max(0, min(127, (int) round(127 - $this->opacity * 127))), | ||
| ]; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,32 @@ | ||
| <?php | ||
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| /** | ||
| * Test: Nette\Utils\ImageColor | ||
| */ | ||
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| declare(strict_types=1); | ||
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| use Nette\Utils\ImageColor; | ||
| use Tester\Assert; | ||
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| require __DIR__ . '/../bootstrap.php'; | ||
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| test('hex()', function () { | ||
| Assert::equal(ImageColor::rgb(17, 34, 51, 1.0), ImageColor::hex('#123')); | ||
| Assert::equal(ImageColor::rgb(17, 34, 51, 0.8 / 3), ImageColor::hex('#1234')); | ||
| Assert::equal(ImageColor::rgb(18, 52, 86), ImageColor::hex('#123456')); | ||
| Assert::equal(ImageColor::rgb(18, 52, 86, 120 / 255), ImageColor::hex('#12345678')); | ||
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| Assert::exception( | ||
| fn() => ImageColor::hex('#12'), | ||
| InvalidArgumentException::class, | ||
| 'Invalid hex color format.', | ||
| ); | ||
| }); | ||
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| test('toRGBA()', function () { | ||
| Assert::same((ImageColor::rgb(0, 1, 2, 0.3))->toRGBA(), [0, 1, 2, 89]); | ||
| Assert::same((ImageColor::rgb(1000, -1, 1000, -10))->toRGBA(), [255, 0, 255, 127]); | ||
| }); |