139 lines
3.9 KiB
PHP
139 lines
3.9 KiB
PHP
<?php declare(strict_types=1);
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namespace App\Captcha\Images;
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use App\Captcha\Contracts\Image as ImageContract;
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use App\Captcha\Dto\Coordinators;
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use App\Captcha\Exceptions\CaptchaException;
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final class Image implements ImageContract
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{
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private readonly \GdImage $image;
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public function __construct(int $width, int $height) {
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$this->image = imagecreatetruecolor($width, $height);
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}
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public function getWidth(): int
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{
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return imagesx($this->image);
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}
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public function getHeight(): int
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{
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return imagesy($this->image);
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}
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public function insertBackground(string $pathToFile): ImageContract
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{
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list($backgroundWidth, $backgroundHeight) = getimagesize($pathToFile);
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$background = $this->createImageFromPathToFile($pathToFile);
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imagecopyresampled(
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dst_image: $this->image,
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src_image: $background,
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dst_x: 0,
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dst_y: 0,
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src_x: 0,
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src_y: 0,
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dst_width: $this->getWidth(),
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dst_height: $this->getHeight(),
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src_width: $backgroundWidth,
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src_height: $backgroundHeight
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);
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imagedestroy($background);
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return $this;
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}
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public function addText(string $text, int $x, int $y, float $size, float $angle, string $hexColor, string $fontName): Coordinators
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{
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$y += intval($size);
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$result = imagefttext(
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image: $this->image,
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size: $size,
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angle: $angle,
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x: $x,
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y: $y,
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color: $this->colorConvertHexToColorIndex($hexColor),
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font_filename: $fontName,
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text: $text
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);
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return new Coordinators(
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x1: $result[0],
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y1: $result[1],
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x2: $result[2],
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y2: $result[3],
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x3: $result[4],
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y3: $result[5],
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x4: $result[6],
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y4: $result[7]
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);
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}
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public function addLine(int $x1, int $y1, int $x2, int $y2, string $hexColor): self
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{
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imageline(
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image: $this->image,
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x1: $x1,
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y1: $y1,
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x2: $x2,
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y2: $y2,
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color: $this->colorConvertHexToColorIndex($hexColor)
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);
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return $this;
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}
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public function encode(): string
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{
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ob_start();
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imagealphablending($this->image, false);
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imagesavealpha($this->image, true);
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imagepng($this->image, null, -1);
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$mime = image_type_to_mime_type(IMAGETYPE_PNG);
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$buffer = ob_get_contents();
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ob_end_clean();
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return sprintf('data:%s;base64,%s',
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$mime,
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base64_encode($buffer)
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);
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}
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public function __destruct() {
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imagedestroy($this->image);
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}
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private function createImageFromPathToFile(string $pathToFile): \GdImage
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{
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return match (mime_content_type($pathToFile)) {
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'image/jpeg' => imagecreatefromjpeg($pathToFile),
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'image/png' => imagecreatefrompng($pathToFile),
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default => throw new CaptchaException('Couldn\'t open the file. Not a valid type. File ' . $pathToFile . '.')
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};
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}
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private function colorConvertHexToColorIndex(string $hexColor): int
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{
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$hexColor = str_replace('#', '', $hexColor);
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if (strlen($hexColor) === 3) {
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return imagecolorexact(
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image: $this->image,
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red: hexdec(str_repeat(substr($hexColor, 0, 1), 2)),
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blue: hexdec(str_repeat(substr($hexColor, 1, 1), 2)),
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green: hexdec(str_repeat(substr($hexColor, 2, 1), 2))
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);
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}
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$colorVal = hexdec($hexColor);
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return imagecolorexact(
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image: $this->image,
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red: 0xFF & ($colorVal >> 0x10),
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blue: 0xFF & ($colorVal >> 0x8),
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green: 0xFF & $colorVal
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);
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}
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}
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