mirror of
https://github.com/lrsjng/h5ai.git
synced 2025-05-25 20:44:53 -04:00
361 lines
7.6 KiB
PHP
361 lines
7.6 KiB
PHP
<?php
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class Thumb {
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private static $FFMPEG_CMDV = array("ffmpeg", "-ss", "0:01:00", "-i", "[SRC]", "-an", "-vframes", "1", "[DEST]");
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private static $AVCONV_CMDV = array("avconv", "-ss", "0:01:00", "-i", "[SRC]", "-an", "-vframes", "1", "[DEST]");
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private static $CONVERT_CMDV = array("convert", "-strip", "[SRC][0]", "[DEST]");
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private static $THUMB_CACHE = "thumbs";
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private $app, $thumbs_path, $thumbs_href;
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public function __construct($app) {
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$this->app = $app;
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$this->thumbs_path = CACHE_PATH . "/" . Thumb::$THUMB_CACHE;
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$this->thumbs_href = CACHE_URL . Thumb::$THUMB_CACHE;
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}
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public function thumb($type, $source_url, $mode, $width, $height) {
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$source_path = $this->app->to_path($source_url);
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if ($type === "img") {
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$capture_path = $source_path;
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} else if ($type === "mov") {
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if (HAS_CMD_FFMPEG) {
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$capture_path = $this->capture(Thumb::$FFMPEG_CMDV, $source_path);
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} else if (HAS_CMD_AVCONV) {
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$capture_path = $this->capture(Thumb::$AVCONV_CMDV, $source_path);
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}
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} else if ($type === "doc" && HAS_CMD_CONVERT) {
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$capture_path = $this->capture(Thumb::$CONVERT_CMDV, $source_path);
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}
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return $this->thumb_href($capture_path, $mode, $width, $height);
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}
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private function thumb_href($source_path, $mode, $width, $height) {
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if (!file_exists($source_path)) {
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return null;
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}
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if (!is_dir($this->thumbs_path)) {
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@mkdir($this->thumbs_path, 0755, true);
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}
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$name = "thumb-" . sha1("$source_path-$width-$height-$mode") . ".jpg";
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$thumb_path = $this->thumbs_path . "/" . $name;
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$thumb_url = $this->thumbs_href . "/" . $name;
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if (!file_exists($thumb_path) || filemtime($source_path) >= filemtime($thumb_path)) {
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$image = new Image();
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$et = false;
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$opts = $this->app->get_options();
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if (HAS_PHP_EXIF && $opts["thumbnails"]["exif"] === true) {
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$et = @exif_thumbnail($source_path);
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}
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if($et !== false) {
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file_put_contents($thumb_path, $et);
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$image->set_source($thumb_path);
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$image->normalize_exif_orientation($source_path);
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} else {
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$image->set_source($source_path);
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}
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$image->thumb($mode, $width, $height);
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$image->save_dest_jpeg($thumb_path, 80);
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}
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return file_exists($thumb_path) ? $thumb_url : null;
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}
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private function capture($cmdv, $source_path) {
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if (!file_exists($source_path)) {
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return null;
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}
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$capture_path = $this->thumbs_path . "/capture-" . sha1($source_path) . ".jpg";
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if (!file_exists($capture_path) || filemtime($source_path) >= filemtime($capture_path)) {
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foreach ($cmdv as &$arg) {
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$arg = str_replace("[SRC]", $source_path, $arg);
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$arg = str_replace("[DEST]", $capture_path, $arg);
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}
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exec_cmdv($cmdv);
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}
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return file_exists($capture_path) ? $capture_path : null;
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}
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}
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class Image {
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private $source_file, $source, $width, $height, $type, $dest;
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public function __construct($filename = null) {
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$this->source_file = null;
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$this->source = null;
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$this->width = null;
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$this->height = null;
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$this->type = null;
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$this->dest = null;
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$this->set_source($filename);
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}
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public function __destruct() {
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$this->release_source();
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$this->release_dest();
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}
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public function set_source($filename) {
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$this->release_source();
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$this->release_dest();
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if (is_null($filename)) {
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return;
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}
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$this->source_file = $filename;
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list($this->width, $this->height, $this->type) = @getimagesize($this->source_file);
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if (!$this->width || !$this->height) {
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$this->source_file = null;
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$this->width = null;
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$this->height = null;
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$this->type = null;
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return;
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}
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$this->source = imagecreatefromstring(file_get_contents($this->source_file));
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}
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public function save_dest_jpeg($filename, $quality = 80) {
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if (!is_null($this->dest)) {
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@imagejpeg($this->dest, $filename, $quality);
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@chmod($filename, 0775);
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}
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}
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public function save_dest_png($filename, $quality = 9) {
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if (!is_null($this->dest)) {
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@imagepng($this->dest, $filename, $quality);
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@chmod($filename, 0775);
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}
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}
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public function release_dest() {
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if (!is_null($this->dest)) {
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@imagedestroy($this->dest);
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$this->dest = null;
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}
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}
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public function release_source() {
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if (!is_null($this->source)) {
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@imagedestroy($this->source);
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$this->source_file = null;
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$this->source = null;
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$this->width = null;
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$this->height = null;
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$this->type = null;
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}
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}
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private function magic($dest_x, $dest_y, $src_x, $src_y, $dest_width, $dest_height, $src_width, $src_height, $can_width = null, $can_height = null, $color = null) {
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if (is_null($this->source)) {
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return;
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}
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if ($can_width === 0) {
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$can_width = 1;
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}
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if ($can_height === 0) {
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$can_height = 1;
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}
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if ($dest_width === 0) {
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$dest_width = 1;
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}
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if ($dest_height === 0) {
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$dest_height = 1;
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}
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if (!is_null($can_width) && !is_null($can_height)) {
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$this->dest = imagecreatetruecolor($can_width, $can_height);
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} else {
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$this->dest = imagecreatetruecolor($dest_width, $dest_height);
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}
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if (is_null($color)) {
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$color = array(255, 255, 255);
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}
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$icol = imagecolorallocate($this->dest, $color[0], $color[1], $color[2]);
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imagefill($this->dest, 0, 0, $icol);
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imagecopyresampled($this->dest, $this->source, $dest_x, $dest_y, $src_x, $src_y, $dest_width, $dest_height, $src_width, $src_height);
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}
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public function thumb($mode, $width, $height = null, $color = null) {
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if ($height === null) {
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$height = $width;
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}
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if ($mode === "square") {
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$this->square_thumb($width);
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} elseif ($mode === "rational") {
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$this->rational_thumb($width, $height);
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} elseif ($mode === "center") {
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$this->center_thumb($width, $height, $color);
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} else {
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$this->free_thumb($width, $height);
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}
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}
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public function square_thumb($width) {
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if (is_null($this->source)) {
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return;
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}
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$a = min($this->width, $this->height);
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$x = intval(($this->width - $a) / 2);
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$y = intval(($this->height - $a) / 2);
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$this->magic(0, 0, $x, $y, $width, $width, $a, $a);
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}
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public function rational_thumb($width, $height) {
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if (is_null($this->source)) {
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return;
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}
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$r = 1.0 * $this->width / $this->height;
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$h = $height;
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$w = $r * $h;
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if ($w > $width) {
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$w = $width;
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$h = 1.0 / $r * $w;
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}
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$w = intval($w);
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$h = intval($h);
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$this->magic(0, 0, 0, 0, $w, $h, $this->width, $this->height);
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}
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public function center_thumb($width, $height, $color = null) {
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if (is_null($this->source)) {
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return;
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}
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$r = 1.0 * $this->width / $this->height;
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$h = $height;
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$w = $r * $h;
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if ($w > $width) {
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$w = $width;
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$h = 1.0 / $r * $w;
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}
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$w = intval($w);
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$h = intval($h);
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$x = intval(($width - $w) / 2);
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$y = intval(($height - $h) / 2);
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$this->magic($x, $y, 0, 0, $w, $h, $this->width, $this->height, $width, $height, $color);
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}
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public function free_thumb($width, $height) {
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if (is_null($this->source)) {
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return;
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}
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$w = intval($width);
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$h = intval($height);
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$this->magic(0, 0, 0, 0, $w, $h, $this->width, $this->height);
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}
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public function rotate($angle) {
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if (is_null($this->source) || ($angle !== 90 && $angle !== 180 && $angle !== 270)) {
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return;
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}
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$this->source = imagerotate($this->source, $angle, 0);
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if ( $angle === 90 || $angle === 270 ) {
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list($this->width, $this->height) = array($this->height, $this->width);
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}
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}
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public function normalize_exif_orientation($exif_source_file = null) {
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if (is_null($this->source) || !function_exists("exif_read_data")) {
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return;
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}
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if ($exif_source_file === null) {
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$exif_source_file = $this->source_file;
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}
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$exif = exif_read_data($exif_source_file);
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switch(@$exif["Orientation"]) {
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case 3:
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$this->rotate(180);
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break;
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case 6:
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$this->rotate(270);
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break;
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case 8:
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$this->rotate(90);
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break;
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}
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}
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}
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