perf: 优化图片压缩
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kuaifan
235
app/Module/Image.php
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235
app/Module/Image.php
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<?php
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namespace App\Module;
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use Imagick;
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/**
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* 图片类：缩略图、调整大小、压缩
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*/
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class Image
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{
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private Imagick $image;
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private string $path;
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private int $height;
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private int $width;
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/**
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* @param $imagePath
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* @throws \ImagickException
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*/
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public function __construct($imagePath) {
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$this->path = $imagePath;
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$this->image = new Imagick($this->path);
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$geo = $this->image->getImageGeometry();
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$this->height = $geo['height'];
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$this->width = $geo['width'];
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}
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/**
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* 获取图片宽度
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* @return int
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*/
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public function getWidth(): int
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{
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return $this->width;
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}
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/**
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* 获取图片高度
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* @return int
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*/
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public function getHeight(): int
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{
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return $this->height;
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}
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/**
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* 创建缩略图
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* @param int $width
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* @param int $height
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* @param string $mode = 'percentage|cover|contain' ($width 和 $height 都设置的情况下有效)
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* @return Image
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* @throws \ImagickException
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*/
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public function thumb(int $width, int $height, string $mode = 'percentage'): static
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{
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if ($height === 0 && $width === 0) {
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return $this;
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}
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if ($width && $height) {
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if ($mode === 'cover') {
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// 铺满背景（超出被裁掉）
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$this->image->cropThumbnailImage($width, $height);
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} else {
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// 等比缩放
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if ($this->width >= $this->height) {
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$this->image->thumbnailImage($width, 0);
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} else {
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$this->image->thumbnailImage(0, $height);
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}
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if ($mode === 'contain') {
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// 显示完整的图
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$background = new Imagick();
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$background->newImage($width, $height, 'none', strtolower(pathinfo($this->path, PATHINFO_EXTENSION)));
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$bg_width = $background->getImageWidth();
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$bg_height = $background->getImageHeight();
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$img_width = $this->image->getImageWidth();
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$img_height = $this->image->getImageHeight();
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if ($img_width / $bg_width > $img_height / $bg_height) {
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$width = $bg_width;
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$height = intval($img_height / ($img_width / $width));
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} else {
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$height = $bg_height;
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$width = intval($img_width / ($img_height / $height));
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}
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$this->image->resizeImage($width, $height, Imagick::FILTER_LANCZOS, 1);
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$x = intval(($bg_width - $width) / 2);
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$y = intval(($bg_height - $height) / 2);
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$background->compositeImage($this->image, Imagick::COMPOSITE_DEFAULT, $x, $y);
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$this->image->destroy();
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$this->image = $background;
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}
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}
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} else {
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$this->image->thumbnailImage($width, $height);
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}
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return $this;
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}
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/**
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* 调整图像大小
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* @param int $width
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* @param int $height
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* @return Image
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* @throws \ImagickException
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*/
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public function resize(int $width, int $height): static
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{
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if ($height === 0 && $width === 0) {
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return $this;
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}
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$this->image->adaptiveResizeImage($width, $height);
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return $this;
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}
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/**
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* 压缩图片
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* @param int $quality
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* @return $this
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* @throws \ImagickException
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*/
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public function compress(int $quality = 100): static
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{
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$format = strtolower($this->image->getImageFormat());
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switch ($format) {
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case 'jpeg':
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case 'jpg':
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$this->image->setImageCompression(Imagick::COMPRESSION_JPEG);
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break;
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case 'png':
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$this->image->setImageCompression(Imagick::COMPRESSION_ZIP);
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break;
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case 'gif':
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$this->image->setImageCompression(Imagick::COMPRESSION_LZW);
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break;
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default:
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return $this;
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}
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if ($quality > 1) {
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$this->image->setImageCompressionQuality($quality);
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} elseif ($quality > 0) {
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$this->image->setImageCompressionQuality($quality * 100);
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} else {
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$this->image->setImageCompressionQuality(100);
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}
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return $this;
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}
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/**
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* 保存结果到文件
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* @param string $savePath Save path
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* @return void
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* @throws \ImagickException
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*/
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public function saveTo(string $savePath): void
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{
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$this->image->writeImage($savePath);
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$this->image->destroy();
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}
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/** ******************************************************************************/
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/** ******************************************************************************/
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/** ******************************************************************************/
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/**
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* 生成缩略图
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* @param string $imagePath 图片路径
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* @param string $savePath 保存路径
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* @param int $width 宽度
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* @param int $height 高度
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* @param string $mode 模式（percentage|cover|contain）
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* @return string|null 成功返回图片后缀，失败返回 false
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*/
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public static function thumbImage(string $imagePath, string $savePath, int $width, int $height, string $mode = 'percentage'): ?string
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{
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if (!file_exists($imagePath)) {
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return null;
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}
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try {
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$extension = strtolower(pathinfo($imagePath, PATHINFO_EXTENSION));
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if (str_contains($savePath, '.{*}')) {
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$savePath = str_replace('.{*}', '.' . $extension, $savePath);
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}
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$image = new Image($imagePath);
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$image->thumb($width, $height, $mode);
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$image->saveTo($savePath);
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return $extension;
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} catch (\ImagickException) {
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return null;
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}
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}
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/**
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* 压缩图片
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* @param string $imagePath 图片路径
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* @param string|null $savePath 保存路径（默认覆盖原图）
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* @param int $quality 压缩质量（0-100）
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* @param float $minSize 最小尺寸（单位：KB）
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* @return bool
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*/
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public static function compressImage(string $imagePath, string $savePath = null, int $quality = 100, float $minSize = 10): bool
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{
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if (Base::settingFind("system", "image_compress") === 'close') {
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return false;
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}
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if (!file_exists($imagePath)) {
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return false;
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}
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$imageSize = filesize($imagePath);
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if ($minSize > 0 && $imageSize < $minSize * 1024) {
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return false;
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}
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if (empty($savePath)) {
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$savePath = $imagePath;
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}
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$tmpPath = $imagePath . '.compress.tmp';
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try {
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$image = new Image($imagePath);
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$image->compress($quality);
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$image->saveTo($tmpPath);
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if (filesize($tmpPath) >= $imageSize) {
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copy($imagePath, $savePath);
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unlink($tmpPath);
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} else {
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rename($tmpPath, $savePath);
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}
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return true;
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} catch (\ImagickException) {
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return false;
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}
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}
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}
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