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Diffstat (limited to 'Zotlabs/Photo/PhotoGd.php')
| -rw-r--r-- | Zotlabs/Photo/PhotoGd.php | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/Zotlabs/Photo/PhotoGd.php b/Zotlabs/Photo/PhotoGd.php new file mode 100644 index 000000000..4054e1866 --- /dev/null +++ b/Zotlabs/Photo/PhotoGd.php @@ -0,0 +1,176 @@ +<?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; + $this->setDimensions(); // Shouldn't really be necessary + } + + public function cropImageRect($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; + } + +} |