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ImageMagickHandler.php
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<?php /** * This file is part of CodeIgniter 4 framework. * * (c) CodeIgniter Foundation <admin@codeigniter.com> * * For the full copyright and license information, please view * the LICENSE file that was distributed with this source code. */ namespace CodeIgniter\Images\Handlers; use CodeIgniter\I18n\Time; use CodeIgniter\Images\Exceptions\ImageException; use Config\Images; use Exception; use Imagick; /** * Class ImageMagickHandler * * FIXME - This needs conversion & unit testing, to use the imagick extension */ class ImageMagickHandler extends BaseHandler { /** * Stores image resource in memory. * * @var string|null */ protected $resource; /** * Constructor. * * @param Images $config * * @throws ImageException */ public function __construct($config = null) { parent::__construct($config); if (! (extension_loaded('imagick') || class_exists(Imagick::class))) { throw ImageException::forMissingExtension('IMAGICK'); // @codeCoverageIgnore } } /** * Handles the actual resizing of the image. * * @return ImageMagickHandler * * @throws Exception */ public function _resize(bool $maintainRatio = false) { $source = ! empty($this->resource) ? $this->resource : $this->image()->getPathname(); $destination = $this->getResourcePath(); $escape = '\\'; if (PHP_OS_FAMILY === 'Windows') { $escape = ''; } $action = $maintainRatio === true ? ' -resize ' . ($this->width ?? 0) . 'x' . ($this->height ?? 0) . ' "' . $source . '" "' . $destination . '"' : ' -resize ' . ($this->width ?? 0) . 'x' . ($this->height ?? 0) . "{$escape}! \"" . $source . '" "' . $destination . '"'; $this->process($action); return $this; } /** * Crops the image. * * @return bool|\CodeIgniter\Images\Handlers\ImageMagickHandler * * @throws Exception */ public function _crop() { $source = ! empty($this->resource) ? $this->resource : $this->image()->getPathname(); $destination = $this->getResourcePath(); $extent = ' '; if ($this->xAxis >= $this->width || $this->yAxis > $this->height) { $extent = ' -background transparent -extent ' . ($this->width ?? 0) . 'x' . ($this->height ?? 0) . ' '; } $action = ' -crop ' . ($this->width ?? 0) . 'x' . ($this->height ?? 0) . '+' . ($this->xAxis ?? 0) . '+' . ($this->yAxis ?? 0) . $extent . escapeshellarg($source) . ' ' . escapeshellarg($destination); $this->process($action); return $this; } /** * Handles the rotation of an image resource. * Doesn't save the image, but replaces the current resource. * * @return $this * * @throws Exception */ protected function _rotate(int $angle) { $angle = '-rotate ' . $angle; $source = ! empty($this->resource) ? $this->resource : $this->image()->getPathname(); $destination = $this->getResourcePath(); $action = ' ' . $angle . ' ' . escapeshellarg($source) . ' ' . escapeshellarg($destination); $this->process($action); return $this; } /** * Flattens transparencies, default white background * * @return $this * * @throws Exception */ protected function _flatten(int $red = 255, int $green = 255, int $blue = 255) { $flatten = "-background 'rgb({$red},{$green},{$blue})' -flatten"; $source = ! empty($this->resource) ? $this->resource : $this->image()->getPathname(); $destination = $this->getResourcePath(); $action = ' ' . $flatten . ' ' . escapeshellarg($source) . ' ' . escapeshellarg($destination); $this->process($action); return $this; } /** * Flips an image along it's vertical or horizontal axis. * * @return $this * * @throws Exception */ protected function _flip(string $direction) { $angle = $direction === 'horizontal' ? '-flop' : '-flip'; $source = ! empty($this->resource) ? $this->resource : $this->image()->getPathname(); $destination = $this->getResourcePath(); $action = ' ' . $angle . ' ' . escapeshellarg($source) . ' ' . escapeshellarg($destination); $this->process($action); return $this; } /** * Get driver version */ public function getVersion(): string { $result = $this->process('-version'); // The first line has the version in it... preg_match('/(ImageMagick\s[\S]+)/', $result[0], $matches); return str_replace('ImageMagick ', '', $matches[0]); } /** * Handles all of the grunt work of resizing, etc. * * @return array Lines of output from shell command * * @throws Exception */ protected function process(string $action, int $quality = 100): array { // Do we have a vaild library path? if (empty($this->config->libraryPath)) { throw ImageException::forInvalidImageLibraryPath($this->config->libraryPath); } if ($action !== '-version') { $this->supportedFormatCheck(); } if (! preg_match('/convert$/i', $this->config->libraryPath)) { $this->config->libraryPath = rtrim($this->config->libraryPath, '/') . '/convert'; } $cmd = $this->config->libraryPath; $cmd .= $action === '-version' ? ' ' . $action : ' -quality ' . $quality . ' ' . $action; $retval = 1; $output = []; // exec() might be disabled if (function_usable('exec')) { @exec($cmd, $output, $retval); } // Did it work? if ($retval > 0) { throw ImageException::forImageProcessFailed(); } return $output; } /** * Saves any changes that have been made to file. If no new filename is * provided, the existing image is overwritten, otherwise a copy of the * file is made at $target. * * Example: * $image->resize(100, 200, true) * ->save(); */ public function save(?string $target = null, int $quality = 90): bool { $original = $target; $target = empty($target) ? $this->image()->getPathname() : $target; // If no new resource has been created, then we're // simply copy the existing one. if (empty($this->resource) && $quality === 100) { if ($original === null) { return true; } $name = basename($target); $path = pathinfo($target, PATHINFO_DIRNAME); return $this->image()->copy($path, $name); } $this->ensureResource(); // Copy the file through ImageMagick so that it has // a chance to convert file format. $action = escapeshellarg($this->resource) . ' ' . escapeshellarg($target); $this->process($action, $quality); unlink($this->resource); return true; } /** * Get Image Resource * * This simply creates an image resource handle * based on the type of image being processed. * Since ImageMagick is used on the cli, we need to * ensure we have a temporary file on the server * that we can use. * * To ensure we can use all features, like transparency, * during the process, we'll use a PNG as the temp file type. * * @return string * * @throws Exception */ protected function getResourcePath() { if ($this->resource !== null) { return $this->resource; } $this->resource = WRITEPATH . 'cache/' . Time::now()->getTimestamp() . '_' . bin2hex(random_bytes(10)) . '.png'; $name = basename($this->resource); $path = pathinfo($this->resource, PATHINFO_DIRNAME); $this->image()->copy($path, $name); return $this->resource; } /** * Make the image resource object if needed * * @throws Exception */ protected function ensureResource() { $this->getResourcePath(); $this->supportedFormatCheck(); } /** * Check if given image format is supported * * @throws ImageException */ protected function supportedFormatCheck() { switch ($this->image()->imageType) { case IMAGETYPE_WEBP: if (! in_array('WEBP', Imagick::queryFormats(), true)) { throw ImageException::forInvalidImageCreate(lang('images.webpNotSupported')); } break; } } /** * Handler-specific method for overlaying text on an image. * * @throws Exception */ protected function _text(string $text, array $options = []) { $xAxis = 0; $yAxis = 0; $gravity = ''; $cmd = ''; // Reverse the vertical offset // When the image is positioned at the bottom // we don't want the vertical offset to push it // further down. We want the reverse, so we'll // invert the offset. Note: The horizontal // offset flips itself automatically if ($options['vAlign'] === 'bottom') { $options['vOffset'] = $options['vOffset'] * -1; } if ($options['hAlign'] === 'right') { $options['hOffset'] = $options['hOffset'] * -1; } // Font if (! empty($options['fontPath'])) { $cmd .= " -font '{$options['fontPath']}'"; } if (isset($options['hAlign'], $options['vAlign'])) { switch ($options['hAlign']) { case 'left': $xAxis = $options['hOffset'] + $options['padding']; $yAxis = $options['vOffset'] + $options['padding']; $gravity = $options['vAlign'] === 'top' ? 'NorthWest' : 'West'; if ($options['vAlign'] === 'bottom') { $gravity = 'SouthWest'; $yAxis = $options['vOffset'] - $options['padding']; } break; case 'center': $xAxis = $options['hOffset'] + $options['padding']; $yAxis = $options['vOffset'] + $options['padding']; $gravity = $options['vAlign'] === 'top' ? 'North' : 'Center'; if ($options['vAlign'] === 'bottom') { $yAxis = $options['vOffset'] - $options['padding']; $gravity = 'South'; } break; case 'right': $xAxis = $options['hOffset'] - $options['padding']; $yAxis = $options['vOffset'] + $options['padding']; $gravity = $options['vAlign'] === 'top' ? 'NorthEast' : 'East'; if ($options['vAlign'] === 'bottom') { $gravity = 'SouthEast'; $yAxis = $options['vOffset'] - $options['padding']; } break; } $xAxis = $xAxis >= 0 ? '+' . $xAxis : $xAxis; $yAxis = $yAxis >= 0 ? '+' . $yAxis : $yAxis; $cmd .= " -gravity {$gravity} -geometry {$xAxis}{$yAxis}"; } // Color if (isset($options['color'])) { [$r, $g, $b] = sscanf("#{$options['color']}", '#%02x%02x%02x'); $cmd .= " -fill 'rgba({$r},{$g},{$b},{$options['opacity']})'"; } // Font Size - use points.... if (isset($options['fontSize'])) { $cmd .= " -pointsize {$options['fontSize']}"; } // Text $cmd .= " -annotate 0 '{$text}'"; $source = ! empty($this->resource) ? $this->resource : $this->image()->getPathname(); $destination = $this->getResourcePath(); $cmd = " '{$source}' {$cmd} '{$destination}'"; $this->process($cmd); } /** * Return the width of an image. * * @return int */ public function _getWidth() { return imagesx(imagecreatefromstring(file_get_contents($this->resource))); } /** * Return the height of an image. * * @return int */ public function _getHeight() { return imagesy(imagecreatefromstring(file_get_contents($this->resource))); } /** * Reads the EXIF information from the image and modifies the orientation * so that displays correctly in the browser. This is especially an issue * with images taken by smartphones who always store the image up-right, * but set the orientation flag to display it correctly. * * @param bool $silent If true, will ignore exceptions when PHP doesn't support EXIF. * * @return $this */ public function reorient(bool $silent = false) { $orientation = $this->getEXIF('Orientation', $silent); switch ($orientation) { case 2: return $this->flip('horizontal'); case 3: return $this->rotate(180); case 4: return $this->rotate(180)->flip('horizontal'); case 5: return $this->rotate(90)->flip('horizontal'); case 6: return $this->rotate(90); case 7: return $this->rotate(270)->flip('horizontal'); case 8: return $this->rotate(270); default: return $this; } } }