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-rw-r--r--Zotlabs/Photo/PhotoGd.php194
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diff --git a/Zotlabs/Photo/PhotoGd.php b/Zotlabs/Photo/PhotoGd.php
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+<?php
+
+namespace Zotlabs\Photo;
+
+/**
+ * @brief GD photo driver.
+ *
+ */
+class PhotoGd extends PhotoDriver {
+
+ /**
+ * {@inheritDoc}
+ * @see \Zotlabs\Photo\PhotoDriver::supportedTypes()
+ */
+ public function supportedTypes() {
+ $t = [];
+ $t['image/jpeg'] = 'jpg';
+ if(imagetypes() & IMG_PNG)
+ $t['image/png'] = 'png';
+ if(imagetypes() & IMG_GIF)
+ $t['image/gif'] = 'gif';
+
+ return $t;
+ }
+
+ protected function load($data, $type) {
+ $this->valid = false;
+ if(! $data)
+ return;
+
+ $this->image = @imagecreatefromstring($data);
+ if($this->image !== false) {
+ $this->valid = true;
+ $this->setDimensions();
+ imagealphablending($this->image, false);
+ imagesavealpha($this->image, true);
+ }
+ }
+
+ protected function setDimensions() {
+ $this->width = imagesx($this->image);
+ $this->height = imagesy($this->image);
+ }
+
+ /**
+ * @brief GD driver does not preserve EXIF, so not need to clear it.
+ *
+ * @return void
+ */
+ public function clearexif() {
+ return;
+ }
+
+ protected function destroy() {
+ if($this->is_valid()) {
+ imagedestroy($this->image);
+ }
+ }
+
+ /**
+ * @brief Return a PHP image resource of the current image.
+ *
+ * @see \Zotlabs\Photo\PhotoDriver::getImage()
+ *
+ * @return boolean|resource
+ */
+ public function getImage() {
+ if(! $this->is_valid())
+ return false;
+
+ return $this->image;
+ }
+
+ public function doScaleImage($dest_width, $dest_height) {
+
+ $dest = imagecreatetruecolor($dest_width, $dest_height);
+ $width = imagesx($this->image);
+ $height = imagesy($this->image);
+
+ imagealphablending($dest, false);
+ imagesavealpha($dest, true);
+ if($this->type == 'image/png')
+ imagefill($dest, 0, 0, imagecolorallocatealpha($dest, 0, 0, 0, 127)); // fill with alpha
+
+ imagecopyresampled($dest, $this->image, 0, 0, 0, 0, $dest_width, $dest_height, $width, $height);
+ if($this->image)
+ imagedestroy($this->image);
+
+ $this->image = $dest;
+ $this->setDimensions();
+ }
+
+ public function rotate($degrees) {
+ if(! $this->is_valid())
+ return false;
+
+ $this->image = imagerotate($this->image, $degrees, 0);
+ $this->setDimensions();
+ }
+
+ public function flip($horiz = true, $vert = false) {
+ if(! $this->is_valid())
+ return false;
+
+ $w = imagesx($this->image);
+ $h = imagesy($this->image);
+ $flipped = imagecreate($w, $h);
+ if($horiz) {
+ for($x = 0; $x < $w; $x++) {
+ imagecopy($flipped, $this->image, $x, 0, $w - $x - 1, 0, 1, $h);
+ }
+ }
+ if($vert) {
+ for($y = 0; $y < $h; $y++) {
+ imagecopy($flipped, $this->image, 0, $y, 0, $h - $y - 1, $w, 1);
+ }
+ }
+ $this->image = $flipped;
+ $this->setDimensions(); // Shouldn't really be necessary
+ }
+
+ public function cropImage($max, $x, $y, $w, $h) {
+ if(!$this->is_valid())
+ return false;
+
+ $dest = imagecreatetruecolor($max, $max);
+ imagealphablending($dest, false);
+ imagesavealpha($dest, true);
+ if($this->type == 'image/png')
+ imagefill($dest, 0, 0, imagecolorallocatealpha($dest, 0, 0, 0, 127)); // fill with alpha
+
+ imagecopyresampled($dest, $this->image, 0, 0, $x, $y, $max, $max, $w, $h);
+ if($this->image)
+ imagedestroy($this->image);
+
+ $this->image = $dest;
+ $this->setDimensions();
+ }
+
+ public function cropImageRect($maxx, $maxy, $x, $y, $w, $h) {
+ if(! $this->is_valid())
+ return false;
+
+ $dest = imagecreatetruecolor($maxx, $maxy);
+ imagealphablending($dest, false);
+ imagesavealpha($dest, true);
+ if($this->type == 'image/png')
+ imagefill($dest, 0, 0, imagecolorallocatealpha($dest, 0, 0, 0, 127)); // fill with alpha
+
+ imagecopyresampled($dest, $this->image, 0, 0, $x, $y, $maxx, $maxy, $w, $h);
+ if($this->image)
+ imagedestroy($this->image);
+
+ $this->image = $dest;
+ $this->setDimensions();
+ }
+
+ /**
+ * {@inheritDoc}
+ * @see \Zotlabs\Photo\PhotoDriver::imageString()
+ */
+ public function imageString() {
+ if(! $this->is_valid())
+ return false;
+
+ $quality = false;
+
+ ob_start();
+
+ switch($this->getType()){
+ case 'image/png':
+ $quality = get_config('system', 'png_quality');
+ if((! $quality) || ($quality > 9))
+ $quality = PNG_QUALITY;
+
+ \imagepng($this->image, NULL, $quality);
+ break;
+ case 'image/jpeg':
+ // gd can lack imagejpeg(), but we verify during installation it is available
+ default:
+ $quality = get_config('system', 'jpeg_quality');
+ if((! $quality) || ($quality > 100))
+ $quality = JPEG_QUALITY;
+
+ \imagejpeg($this->image, NULL, $quality);
+ break;
+ }
+ $string = ob_get_contents();
+ ob_end_clean();
+
+ return $string;
+ }
+
+}