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196 lines
4.1 KiB
PHP
196 lines
4.1 KiB
PHP
<?php
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namespace Zotlabs\Photo;
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/**
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* @brief GD photo driver.
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*
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*/
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class PhotoGd extends PhotoDriver {
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/**
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* {@inheritDoc}
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* @see \Zotlabs\Photo\PhotoDriver::supportedTypes()
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*/
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public function supportedTypes() {
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$t = [];
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$t['image/jpeg'] = 'jpg';
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if (imagetypes() & IMG_PNG) {
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$t['image/png'] = 'png';
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}
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if (imagetypes() & IMG_GIF) {
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$t['image/gif'] = 'gif';
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}
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if (imagetypes() & IMG_WEBP) {
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$t['image/webp'] = 'webp';
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}
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return $t;
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}
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protected function load($data, $type) {
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$this->valid = false;
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if (! $data) {
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return;
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}
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$this->image = @imagecreatefromstring($data);
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if ($this->image !== false) {
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$this->valid = true;
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$this->setDimensions();
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imagealphablending($this->image, false);
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imagesavealpha($this->image, true);
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}
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}
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protected function setDimensions() {
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$this->width = imagesx($this->image);
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$this->height = imagesy($this->image);
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}
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/**
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* @brief GD driver does not preserve EXIF, so not need to clear it.
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*
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* @return void
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*/
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public function clearexif() {
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return;
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}
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protected function destroy() {
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if ($this->is_valid()) {
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imagedestroy($this->image);
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}
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}
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/**
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* @brief Return a PHP image resource of the current image.
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*
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* @see \Zotlabs\Photo\PhotoDriver::getImage()
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*
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* @return boolean|resource
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*/
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public function getImage() {
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if (! $this->is_valid()) {
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return false;
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}
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return $this->image;
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}
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public function doScaleImage($dest_width, $dest_height) {
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$dest = imagecreatetruecolor($dest_width, $dest_height);
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$width = imagesx($this->image);
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$height = imagesy($this->image);
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imagealphablending($dest, false);
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imagesavealpha($dest, true);
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if ($this->type == 'image/png') {
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imagefill($dest, 0, 0, imagecolorallocatealpha($dest, 0, 0, 0, 127)); // fill with alpha
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}
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imagecopyresampled($dest, $this->image, 0, 0, 0, 0, $dest_width, $dest_height, $width, $height);
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if ($this->image) {
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imagedestroy($this->image);
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}
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$this->image = $dest;
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$this->setDimensions();
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}
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public function rotate($degrees) {
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if (! $this->is_valid()) {
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return false;
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}
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$this->image = imagerotate($this->image, $degrees, 0);
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$this->setDimensions();
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}
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public function flip($horiz = true, $vert = false) {
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if (! $this->is_valid()) {
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return false;
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}
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$w = imagesx($this->image);
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$h = imagesy($this->image);
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$flipped = imagecreate($w, $h);
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if ($horiz) {
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for ($x = 0; $x < $w; $x++) {
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imagecopy($flipped, $this->image, $x, 0, $w - $x - 1, 0, 1, $h);
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}
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}
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if ($vert) {
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for ($y = 0; $y < $h; $y++) {
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imagecopy($flipped, $this->image, 0, $y, 0, $h - $y - 1, $w, 1);
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}
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}
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$this->image = $flipped;
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$this->setDimensions(); // Shouldn't really be necessary
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}
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public function cropImageRect($maxx, $maxy, $x, $y, $w, $h) {
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if (! $this->is_valid()) {
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return false;
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}
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$dest = imagecreatetruecolor($maxx, $maxy);
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imagealphablending($dest, false);
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imagesavealpha($dest, true);
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if ($this->type == 'image/png') {
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imagefill($dest, 0, 0, imagecolorallocatealpha($dest, 0, 0, 0, 127)); // fill with alpha
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}
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imagecopyresampled($dest, $this->image, 0, 0, $x, $y, $maxx, $maxy, $w, $h);
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if ($this->image) {
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imagedestroy($this->image);
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}
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$this->image = $dest;
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$this->setDimensions();
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}
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/**
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* {@inheritDoc}
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* @see \Zotlabs\Photo\PhotoDriver::imageString()
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*/
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public function imageString() {
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if (! $this->is_valid()) {
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return false;
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}
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$quality = false;
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ob_start();
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switch ($this->getType()){
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case 'image/webp':
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\imagewebp($this->image);
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break;
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case 'image/png':
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$quality = get_config('system', 'png_quality');
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if ((! $quality) || ($quality > 9)) {
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$quality = PNG_QUALITY;
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}
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\imagepng($this->image, NULL, $quality);
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break;
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case 'image/jpeg':
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// gd can lack imagejpeg(), but we verify during installation it is available
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default:
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$quality = get_config('system', 'jpeg_quality');
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if ((! $quality) || ($quality > 100)) {
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$quality = JPEG_QUALITY;
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}
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\imagejpeg($this->image, NULL, $quality);
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break;
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}
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$string = ob_get_contents();
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ob_end_clean();
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return $string;
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}
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}
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