mirror of
https://github.com/pierre42100/comunic
synced 2024-11-17 02:51:13 +00:00
352 lines
9.5 KiB
PHP
352 lines
9.5 KiB
PHP
<?php
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namespace Gregwar\Image\Adapter;
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abstract class Common extends Adapter
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{
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/**
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* @inheritdoc
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*/
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public function zoomCrop($width, $height, $background = 'transparent', $xPosLetter = 'center', $yPosLetter = 'center')
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{
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// Calculate the different ratios
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$originalRatio = $this->width() / $this->height();
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$newRatio = $width / $height;
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// Compare ratios
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if ($originalRatio > $newRatio) {
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// Original image is wider
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$newHeight = $height;
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$newWidth = (int) $height * $originalRatio;
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} else {
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// Equal width or smaller
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$newHeight = (int) $width / $originalRatio;
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$newWidth = $width;
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}
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// Perform resize
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$this->resize($newWidth, $newHeight, $background, true);
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// Define x position
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switch($xPosLetter) {
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case 'L':
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case 'left':
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$xPos = 0;
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break;
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case 'R':
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case 'right':
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$xPos = (int) $newWidth - $width;
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break;
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default:
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$xPos = (int) ($newWidth - $width) / 2;
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}
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// Define y position
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switch($yPosLetter) {
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case 'T':
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case 'top':
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$yPos = 0;
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break;
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case 'B':
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case 'bottom':
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$yPos = (int) $newHeight - $height;
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break;
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default:
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$yPos = (int) ($newHeight - $height) / 2;
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}
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// Crop image to reach desired size
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$this->crop($xPos, $yPos, $width, $height);
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return $this;
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}
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/**
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* Resizes the image forcing the destination to have exactly the
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* given width and the height
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*
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* @param int $w the width
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* @param int $h the height
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* @param int $bg the background
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*/
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public function forceResize($width = null, $height = null, $background = 'transparent')
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{
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return $this->resize($width, $height, $background, true);
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}
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/**
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* @inheritdoc
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*/
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public function scaleResize($width = null, $height = null, $background='transparent', $crop = false)
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{
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return $this->resize($width, $height, $background, false, true, $crop);
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}
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/**
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* @inheritdoc
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*/
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public function cropResize($width = null, $height = null, $background='transparent')
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{
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return $this->resize($width, $height, $background, false, false, true);
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}
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/**
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* Fix orientation using Exif informations
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*/
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public function fixOrientation()
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{
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if (!extension_loaded('exif')) {
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throw new \RuntimeException('You need to EXIF PHP Extension to use this function');
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}
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$exif = exif_read_data($this->source->getInfos());
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if(!array_key_exists('Orientation', $exif)) {
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return $this;
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}
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switch($exif['Orientation']) {
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case 1:
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break;
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case 2:
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$this->flip(false, true);
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break;
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case 3: // 180 rotate left
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$this->rotate(180);
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break;
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case 4: // vertical flip
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$this->flip(true, false);
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break;
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case 5: // vertical flip + 90 rotate right
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$this->flip(true, false);
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$this->rotate(-90);
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break;
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case 6: // 90 rotate right
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$this->rotate(-90);
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break;
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case 7: // horizontal flip + 90 rotate right
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$this->flip(false, true);
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$this->rotate(-90);
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break;
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case 8: // 90 rotate left
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$this->rotate(90);
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break;
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}
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return $this;
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}
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/**
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* Opens the image
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*/
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abstract protected function openGif($file);
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abstract protected function openJpeg($file);
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abstract protected function openPng($file);
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/**
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* Creates an image
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*/
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abstract protected function createImage($width, $height);
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/**
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* Creating an image using $data
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*/
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abstract protected function createImageFromData($data);
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/**
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* Loading image from $resource
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*/
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protected function loadResource($resource)
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{
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$this->resource = $resource;
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}
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protected function loadFile($file, $type)
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{
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if (!$this->supports($type)) {
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throw new \RuntimeException('Type '.$type.' is not supported by GD');
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}
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if ($type == 'jpeg') {
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$this->openJpeg($file);
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}
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if ($type == 'gif') {
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$this->openGif($file);
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}
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if ($type == 'png') {
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$this->openPng($file);
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}
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if (false === $this->resource) {
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throw new \UnexpectedValueException('Unable to open file ('.$file.')');
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} else {
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$this->convertToTrueColor();
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}
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}
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/**
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* @inheritdoc
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*/
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public function init()
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{
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$source = $this->source;
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if ($source instanceof \Gregwar\Image\Source\File) {
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$this->loadFile($source->getFile(), $source->guessType());
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} else if ($source instanceof \Gregwar\Image\Source\Create) {
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$this->createImage($source->getWidth(), $source->getHeight());
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} else if ($source instanceof \Gregwar\Image\Source\Data) {
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$this->createImageFromData($source->getData());
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} else if ($source instanceof \Gregwar\Image\Source\Resource) {
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$this->loadResource($source->getResource());
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} else {
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throw new \Exception('Unsupported image source type '.get_class($source));
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}
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return $this;
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}
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/**
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* @inheritdoc
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*/
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public function resize($width = null, $height = null, $background = 'transparent', $force = false, $rescale = false, $crop = false)
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{
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$current_width = $this->width();
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$current_height = $this->height();
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$new_width = 0;
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$new_height = 0;
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$scale = 1.0;
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if ($height === null && preg_match('#^(.+)%$#mUsi', $width, $matches)) {
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$width = round($current_width * ((float)$matches[1]/100.0));
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$height = round($current_height * ((float)$matches[1]/100.0));
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}
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if (!$rescale && (!$force || $crop)) {
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if ($width!=null && $current_width>$width) {
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$scale = $current_width/$width;
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}
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if ($height!=null && $current_height>$height) {
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if ($current_height/$height > $scale)
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$scale = $current_height/$height;
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}
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} else {
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if ($width!=null) {
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$scale = $current_width/$width;
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$new_width = $width;
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}
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if ($height!=null) {
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if ($width!=null && $rescale) {
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$scale = max($scale,$current_height/$height);
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} else {
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$scale = $current_height/$height;
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}
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$new_height = $height;
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}
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}
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if (!$force || $width==null || $rescale) {
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$new_width = round($current_width/$scale);
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}
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if (!$force || $height==null || $rescale) {
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$new_height = round($current_height/$scale);
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}
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if ($width == null || $crop) {
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$width = $new_width;
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}
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if ($height == null || $crop) {
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$height = $new_height;
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}
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$this->doResize($background, $width, $height, $new_width, $new_height);
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}
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/**
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* Trim background color arround the image
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*
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* @param int $bg the background
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*/
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protected function _trimColor($background='transparent')
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{
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$width = $this->width();
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$height = $this->height();
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$b_top = 0;
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$b_lft = 0;
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$b_btm = $height - 1;
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$b_rt = $width - 1;
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//top
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for(; $b_top < $height; ++$b_top) {
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for($x = 0; $x < $width; ++$x) {
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if ($this->getColor($x, $b_top) != $background) {
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break 2;
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}
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}
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}
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// bottom
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for(; $b_btm >= 0; --$b_btm) {
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for($x = 0; $x < $width; ++$x) {
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if ($this->getColor($x, $b_btm) != $background) {
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break 2;
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}
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}
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}
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// left
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for(; $b_lft < $width; ++$b_lft) {
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for($y = $b_top; $y <= $b_btm; ++$y) {
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if ($this->getColor($b_lft, $y) != $background) {
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break 2;
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}
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}
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}
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// right
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for(; $b_rt >= 0; --$b_rt) {
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for($y = $b_top; $y <= $b_btm; ++$y) {
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if ($this->getColor($b_rt, $y) != $background) {
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break 2;
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}
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}
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}
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$b_btm++;
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$b_rt++;
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$this->crop($b_lft, $b_top, $b_rt - $b_lft, $b_btm - $b_top);
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}
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/**
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* Resizes the image to an image having size of $target_width, $target_height, using
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* $new_width and $new_height and padding with $bg color
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*/
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abstract protected function doResize($bg, $target_width, $target_height, $new_width, $new_height);
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/**
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* Gets the color of the $x, $y pixel
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*/
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abstract protected function getColor($x, $y);
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/**
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* @inheritdoc
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*/
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public function enableProgressive(){
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throw new \Exception('The Adapter '.$this->getName().' does not support Progressive Image loading');
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}
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}
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