mirror of
https://github.com/vichan-devel/vichan.git
synced 2024-11-24 15:40:12 +01:00
429 lines
13 KiB
PHP
429 lines
13 KiB
PHP
<?php
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if($_SERVER['SCRIPT_FILENAME'] == str_replace('\\', '/', __FILE__)) {
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// You cannot request this file directly.
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header('Location: ../', true, 302);
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exit;
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}
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class Image {
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public $src, $format, $image, $size;
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public function __construct($src, $format = false) {
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global $config;
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$this->src = $src;
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$this->format = $format;
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if($config['imagick']) {
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$classname = 'ImageImagick';
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} else {
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$classname = 'Image' . strtoupper($this->format);
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if(!class_exists($classname)) {
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error('Unsupported file format: ' . $this->format);
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}
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}
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$this->image = new $classname($this);
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if(!$this->image->valid()) {
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$this->delete();
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error($config['error']['invalidimg']);
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}
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$this->size = (object)Array('width' => $this->image->_width(), 'height' => $this->image->_height());
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if($this->size->width < 1 || $this->size->height < 1) {
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$this->delete();
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error($config['error']['invalidimg']);
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}
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}
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public function resize($extension, $max_width, $max_height) {
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global $config;
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if($config['imagick']) {
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$classname = 'ImageImagick';
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} else {
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$classname = 'Image' . strtoupper($extension);
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if(!class_exists($classname)) {
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error('Unsupported file format: ' . $extension);
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}
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}
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$thumb = new $classname(false);
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$thumb->original_width = $this->size->width;
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$thumb->original_height = $this->size->height;
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$x_ratio = $max_width / $this->size->width;
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$y_ratio = $max_height / $this->size->height;
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if(($this->size->width <= $max_width) && ($this->size->height <= $max_height)) {
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$width = $this->size->width;
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$height = $this->size->height;
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} elseif (($x_ratio * $this->size->height) < $max_height) {
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$height = ceil($x_ratio * $this->size->height);
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$width = $max_width;
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} else {
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$width = ceil($y_ratio * $this->size->width);
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$height = $max_height;
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}
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$thumb->_resize($this->image->image, $width, $height);
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return $thumb;
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}
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public function to($dst) {
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$this->image->to($dst);
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}
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public function delete() {
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file_unlink($this->src);
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}
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public function destroy() {
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$this->image->_destroy();
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}
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}
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class ImageGD {
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public function GD_create() {
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$this->image = imagecreatetruecolor($this->width, $this->height);
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}
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public function GD_copyresampled() {
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imagecopyresampled($this->image, $this->original, 0, 0, 0, 0, $this->width, $this->height, $this->original_width, $this->original_height);
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}
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public function GD_resize() {
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$this->GD_create();
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$this->GD_copyresampled();
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}
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}
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class ImageBase extends ImageGD {
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public $image, $src, $original, $original_width, $original_height, $width, $height;
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public function valid() {
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return (bool)$this->image;
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}
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public function __construct($img) {
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if(method_exists($this, 'init'))
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$this->init();
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if($img !== false) {
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$this->src = &$img->src;
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$this->from();
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}
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}
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public function _width() {
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if(method_exists($this, 'width'))
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return $this->width();
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// use default GD functions
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return imagesx($this->image);
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}
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public function _height() {
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if(method_exists($this, 'height'))
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return $this->height();
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// use default GD functions
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return imagesy($this->image);
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}
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public function _destroy() {
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if(method_exists($this, 'destroy'))
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return $this->destroy();
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// use default GD functions
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return imagedestroy($this->image);
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}
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public function _resize($original, $width, $height) {
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$this->original = &$original;
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$this->width = $width;
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$this->height = $height;
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if(method_exists($this, 'resize'))
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$this->resize();
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else
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// use default GD functions
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$this->GD_resize();
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}
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}
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class ImageImagick extends ImageBase {
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public function init() {
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$this->image = new Imagick();
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$this->image->setBackgroundColor(new ImagickPixel('transparent'));
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}
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public function from() {
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try {
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$this->image->readImage($this->src);
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} catch(ImagickException $e) {
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// invalid image
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$this->image = false;
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}
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}
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public function to($src) {
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if(preg_match('/\.gif$/i', $src))
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$this->image->writeImages($src, true);
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else
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$this->image->writeImage($src);
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}
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public function width() {
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return $this->image->getImageWidth();
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}
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public function height() {
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return $this->image->getImageHeight();
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}
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public function destroy() {
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return $this->image->destroy();
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}
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public function resize() {
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global $config;
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if(preg_match('/\.gif$/i', $this->src) && $config['thumb_ext'] == 'gif') {
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$this->image = new Imagick();
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$this->image->setFormat('gif');
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$keep_frames = Array();
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for($i = 0; $i < $this->original->getNumberImages(); $i += floor($this->original->getNumberImages() / $config['thumb_keep_animation_frames']))
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$keep_frames[] = $i;
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$i = 0;
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$delay = 0;
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foreach($this->original as $frame) {
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$delay += $frame->getImageDelay();
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//if($i < $config['thumb_keep_animation_frames']) {
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if(in_array($i, $keep_frames)) {
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// $frame->scaleImage($this->width, $this->height, false);
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$frame->sampleImage($this->width, $this->height);
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$frame->setImagePage($this->width, $this->height, 0, 0);
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$frame->setImageDelay($delay);
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$delay = 0;
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$this->image->addImage($frame->getImage());
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}
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$i++;
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}
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} else {
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$this->image = clone $this->original;
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// only resize one frame
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$this->image->scaleImage($this->width, $this->height, false);
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}
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}
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}
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class ImagePNG extends ImageBase {
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public function from() {
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$this->image = @imagecreatefrompng($this->src);
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}
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public function to($src) {
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global $config;
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imagepng($this->image, $src, $config['thumb_quality']);
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}
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public function resize() {
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$this->GD_create();
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imagecolortransparent($this->image, imagecolorallocatealpha($this->image, 0, 0, 0, 0));
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imagesavealpha($this->image, true);
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imagealphablending($this->image, false);
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$this->GD_copyresampled();
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}
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}
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class ImageGIF extends ImageBase {
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public function from() {
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$this->image = @imagecreatefromgif($this->src);
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}
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public function to($src) {
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imagegif($this->image, $src);
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}
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public function resize() {
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$this->GD_create();
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imagecolortransparent($this->image, imagecolorallocatealpha($this->image, 0, 0, 0, 0));
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imagesavealpha($this->image, true);
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$this->GD_copyresampled();
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}
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}
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class ImageJPG extends ImageBase {
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public function from() {
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$this->image = @imagecreatefromjpeg($this->src);
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}
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public function to($src) {
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imagejpeg($this->image, $src);
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}
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}
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class ImageJPEG extends ImageJPG {
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}
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class ImageBMP extends ImageBase {
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public function from() {
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$this->image = @imagecreatefrombmp($this->src);
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}
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public function to($src) {
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imagebmp($this->image, $src);
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}
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}
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/*********************************************/
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/* Fonction: imagecreatefrombmp */
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/* Author: DHKold */
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/* Contact: admin@dhkold.com */
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/* Date: The 15th of June 2005 */
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/* Version: 2.0B */
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/*********************************************/
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function imagecreatefrombmp($filename) {
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if (! $f1 = fopen($filename,"rb")) return FALSE;
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$FILE = unpack("vfile_type/Vfile_size/Vreserved/Vbitmap_offset", fread($f1,14));
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if ($FILE['file_type'] != 19778) return FALSE;
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$BMP = unpack('Vheader_size/Vwidth/Vheight/vplanes/vbits_per_pixel'.
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'/Vcompression/Vsize_bitmap/Vhoriz_resolution'.
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'/Vvert_resolution/Vcolors_used/Vcolors_important', fread($f1,40));
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$BMP['colors'] = pow(2,$BMP['bits_per_pixel']);
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if ($BMP['size_bitmap'] == 0) $BMP['size_bitmap'] = $FILE['file_size'] - $FILE['bitmap_offset'];
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$BMP['bytes_per_pixel'] = $BMP['bits_per_pixel']/8;
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$BMP['bytes_per_pixel2'] = ceil($BMP['bytes_per_pixel']);
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$BMP['decal'] = ($BMP['width']*$BMP['bytes_per_pixel']/4);
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$BMP['decal'] -= floor($BMP['width']*$BMP['bytes_per_pixel']/4);
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$BMP['decal'] = 4-(4*$BMP['decal']);
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if ($BMP['decal'] == 4) $BMP['decal'] = 0;
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$PALETTE = array();
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if ($BMP['colors'] < 16777216)
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{
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$PALETTE = unpack('V'.$BMP['colors'], fread($f1,$BMP['colors']*4));
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}
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$IMG = fread($f1,$BMP['size_bitmap']);
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$VIDE = chr(0);
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$res = imagecreatetruecolor($BMP['width'],$BMP['height']);
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$P = 0;
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$Y = $BMP['height']-1;
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while ($Y >= 0)
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{
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$X=0;
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while ($X < $BMP['width'])
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{
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if ($BMP['bits_per_pixel'] == 24)
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$COLOR = unpack("V",substr($IMG,$P,3).$VIDE);
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elseif ($BMP['bits_per_pixel'] == 16)
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{
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$COLOR = unpack("n",substr($IMG,$P,2));
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$COLOR[1] = $PALETTE[$COLOR[1]+1];
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}
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elseif ($BMP['bits_per_pixel'] == 8)
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{
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$COLOR = unpack("n",$VIDE.substr($IMG,$P,1));
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$COLOR[1] = $PALETTE[$COLOR[1]+1];
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}
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elseif ($BMP['bits_per_pixel'] == 4)
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{
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$COLOR = unpack("n",$VIDE.substr($IMG,floor($P),1));
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if (($P*2)%2 == 0) $COLOR[1] = ($COLOR[1] >> 4) ; else $COLOR[1] = ($COLOR[1] & 0x0F);
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$COLOR[1] = $PALETTE[$COLOR[1]+1];
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}
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elseif ($BMP['bits_per_pixel'] == 1)
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{
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$COLOR = unpack("n",$VIDE.substr($IMG,floor($P),1));
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if (($P*8)%8 == 0) $COLOR[1] = $COLOR[1] >>7;
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elseif (($P*8)%8 == 1) $COLOR[1] = ($COLOR[1] & 0x40)>>6;
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elseif (($P*8)%8 == 2) $COLOR[1] = ($COLOR[1] & 0x20)>>5;
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elseif (($P*8)%8 == 3) $COLOR[1] = ($COLOR[1] & 0x10)>>4;
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elseif (($P*8)%8 == 4) $COLOR[1] = ($COLOR[1] & 0x8)>>3;
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elseif (($P*8)%8 == 5) $COLOR[1] = ($COLOR[1] & 0x4)>>2;
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elseif (($P*8)%8 == 6) $COLOR[1] = ($COLOR[1] & 0x2)>>1;
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elseif (($P*8)%8 == 7) $COLOR[1] = ($COLOR[1] & 0x1);
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$COLOR[1] = $PALETTE[$COLOR[1]+1];
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}
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else
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return FALSE;
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imagesetpixel($res,$X,$Y,$COLOR[1]);
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$X++;
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$P += $BMP['bytes_per_pixel'];
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}
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$Y--;
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$P+=$BMP['decal'];
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}
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fclose($f1);
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return $res;
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}
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function imagebmp(&$img, $filename='') {
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$widthOrig = imagesx($img);
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$widthFloor = ((floor($widthOrig/16))*16);
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$widthCeil = ((ceil($widthOrig/16))*16);
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$height = imagesy($img);
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$size = ($widthCeil*$height*3)+54;
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// Bitmap File Header
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$result = 'BM'; // header (2b)
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$result .= int_to_dword($size); // size of file (4b)
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$result .= int_to_dword(0); // reserved (4b)
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$result .= int_to_dword(54); // byte location in the file which is first byte of IMAGE (4b)
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// Bitmap Info Header
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$result .= int_to_dword(40); // Size of BITMAPINFOHEADER (4b)
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$result .= int_to_dword($widthCeil); // width of bitmap (4b)
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$result .= int_to_dword($height); // height of bitmap (4b)
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$result .= int_to_word(1); // biPlanes = 1 (2b)
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$result .= int_to_word(24); // biBitCount = {1 (mono) or 4 (16 clr ) or 8 (256 clr) or 24 (16 Mil)} (2b
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$result .= int_to_dword(0); // RLE COMPRESSION (4b)
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$result .= int_to_dword(0); // width x height (4b)
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$result .= int_to_dword(0); // biXPelsPerMeter (4b)
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$result .= int_to_dword(0); // biYPelsPerMeter (4b)
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$result .= int_to_dword(0); // Number of palettes used (4b)
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$result .= int_to_dword(0); // Number of important colour (4b)
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// is faster than chr()
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$arrChr = array();
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for($i=0; $i<256; $i++){
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$arrChr[$i] = chr($i);
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}
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// creates image data
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$bgfillcolor = array('red'=>0, 'green'=>0, 'blue'=>0);
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// bottom to top - left to right - attention blue green red !!!
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$y=$height-1;
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for ($y2=0; $y2<$height; $y2++) {
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for ($x=0; $x<$widthFloor; ) {
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$rgb = imagecolorsforindex($img, imagecolorat($img, $x++, $y));
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$result .= $arrChr[$rgb['blue']].$arrChr[$rgb['green']].$arrChr[$rgb['red']];
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$rgb = imagecolorsforindex($img, imagecolorat($img, $x++, $y));
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$result .= $arrChr[$rgb['blue']].$arrChr[$rgb['green']].$arrChr[$rgb['red']];
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$rgb = imagecolorsforindex($img, imagecolorat($img, $x++, $y));
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$result .= $arrChr[$rgb['blue']].$arrChr[$rgb['green']].$arrChr[$rgb['red']];
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$rgb = imagecolorsforindex($img, imagecolorat($img, $x++, $y));
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$result .= $arrChr[$rgb['blue']].$arrChr[$rgb['green']].$arrChr[$rgb['red']];
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$rgb = imagecolorsforindex($img, imagecolorat($img, $x++, $y));
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$result .= $arrChr[$rgb['blue']].$arrChr[$rgb['green']].$arrChr[$rgb['red']];
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$rgb = imagecolorsforindex($img, imagecolorat($img, $x++, $y));
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$result .= $arrChr[$rgb['blue']].$arrChr[$rgb['green']].$arrChr[$rgb['red']];
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$rgb = imagecolorsforindex($img, imagecolorat($img, $x++, $y));
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$result .= $arrChr[$rgb['blue']].$arrChr[$rgb['green']].$arrChr[$rgb['red']];
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$rgb = imagecolorsforindex($img, imagecolorat($img, $x++, $y));
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$result .= $arrChr[$rgb['blue']].$arrChr[$rgb['green']].$arrChr[$rgb['red']];
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}
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for ($x=$widthFloor; $x<$widthCeil; $x++) {
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$rgb = ($x<$widthOrig) ? imagecolorsforindex($img, imagecolorat($img, $x, $y)) : $bgfillcolor;
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$result .= $arrChr[$rgb['blue']].$arrChr[$rgb['green']].$arrChr[$rgb['red']];
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}
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$y--;
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}
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// see imagegif
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if($filename == '') {
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echo $result;
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} else {
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$file = fopen($filename, 'wb');
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fwrite($file, $result);
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fclose($file);
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}
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}
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// imagebmp helpers
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function int_to_dword($n) {
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return chr($n & 255).chr(($n >> 8) & 255).chr(($n >> 16) & 255).chr(($n >> 24) & 255);
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}
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function int_to_word($n) {
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return chr($n & 255).chr(($n >> 8) & 255);
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}
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?>
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