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<?php |
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/** |
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* This file is part of PhpAidc LabelPrinter package. |
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* |
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* © Appwilio (https://appwilio.com) |
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* © JhaoDa (https://github.com/jhaoda) |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace PhpAidc\LabelPrinter\Emulation; |
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use PhpAidc\LabelPrinter\Enum\Angle; |
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use PhpAidc\LabelPrinter\Enum\Anchor; |
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final class Canvas |
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{ |
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/** @var int|null */ |
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private $width; |
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/** @var int|null */ |
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private $height; |
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/** @var \Imagick */ |
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private $image; |
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public function __construct(?int $width = null, ?int $height = null) |
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{ |
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$this->width = $width; |
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$this->height = $height; |
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$this->image = new \Imagick(); |
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} |
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public function write( |
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string $text, |
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string $font, |
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float $size, |
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Angle $rotation, |
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?Anchor $anchor, |
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bool $inverted = false, |
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?int $spacing = null |
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): void { |
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$canvas = new \ImagickDraw(); |
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$canvas->setFont($font); |
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$canvas->setFontSize($size); |
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$canvas->setTextAntialias(true); |
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$canvas->setGravity($anchor ? $anchor->getValue() : \Imagick::GRAVITY_NORTHWEST); |
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if ($spacing !== null) { |
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$canvas->setTextInterLineSpacing($spacing); |
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} |
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if ($inverted) { |
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$foreground = new \ImagickPixel('#FFF'); |
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$background = new \ImagickPixel('#00000000'); |
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$canvas->setTextUnderColor(new \ImagickPixel('#000000')); |
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} else { |
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$foreground = new \ImagickPixel('#000'); |
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$background = new \ImagickPixel('#FFF'); |
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} |
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$canvas->setFillColor($foreground); |
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$metrics = $this->image->queryFontMetrics($canvas, $text, true); |
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if ($metrics['textWidth'] > $this->width) { |
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[$realWidth, $lines] = $this->splitText($canvas, $text); |
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$realWidth = $this->width ?? $realWidth; |
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$realHeight = $this->height ?? $metrics['textHeight'] * \count($lines); |
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$text = \implode("\n", $lines); |
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} else { |
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$metrics = $this->image->queryFontMetrics($canvas, $text, false); |
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$realWidth = \max($this->width, $metrics['textWidth']); |
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$realHeight = \max($this->height, $metrics['textHeight']); |
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} |
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$canvas->annotation(0, 0, $text); |
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$this->image->newImage((int) $realWidth, (int) $realHeight, $background); |
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$this->image->drawImage($canvas); |
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if ($rotation->getDegrees()) { |
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$this->image->rotateImage($background, $rotation->getDegrees()); |
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} |
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} |
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public function toImage(): \Imagick |
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{ |
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$this->image->setImageFormat('png'); |
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$this->image->setImageType(\Imagick::IMGTYPE_GRAYSCALE); |
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return $this->image; |
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} |
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private function splitText(\ImagickDraw $canvas, string $text): array |
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{ |
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$words = \preg_split('~\s~u', \trim($text), -1, \PREG_SPLIT_NO_EMPTY); |
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if (empty($words)) { |
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return [ |
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$this->image->queryFontMetrics($canvas, $text)['textWidth'], |
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[$text], |
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]; |
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} |
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$i = 1; |
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$lines = []; |
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$lineWidth = []; |
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while(\count($words) > 0) { |
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$metrics = $this->image->queryFontMetrics($canvas, \implode(' ', \array_slice($words, 0, $i))); |
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if ($metrics['textWidth'] > $this->width || \count($words) < $i) { |
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$lineWidth[] = $metrics['textWidth']; |
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$lines[] = \implode(' ', \array_slice($words, 0, \max($i - 1, 1))); |
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$words = \array_slice($words, \max($i - 1, 1)); |
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$i = 0; |
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} |
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$i++; |
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} |
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return [\max($lineWidth), $lines]; |
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} |
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} |
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php-aidc /
label-printer
