<?php
namespace Zotlabs\Photo;
/**
* @brief Abstract photo driver class.
*
* Inheritance seems not to be the best design pattern for such photo drivers.
*/
abstract class PhotoDriver {
/**
* @brief This variable keeps the image.
*
* For GD it is a PHP image resource.
* For ImageMagick it is an \Imagick object.
*
* @var resource|\Imagick
*/
protected $image;
/**
* @var integer
*/
protected $width;
/**
* @var integer
*/
protected $height;
/**
* @var boolean
*/
protected $valid;
/**
* @brief The mimetype of the image.
*
* @var string
*/
protected $type;
/**
* @brief Supported mimetypes by the used photo driver.
*
* @var array
*/
protected $types;
/**
* @brief Return an array with supported mimetypes.
*
* @return array
* Associative array with mimetype as key and file extension as value.
*/
abstract public function supportedTypes();
abstract protected function load($data, $type);
abstract protected function destroy();
abstract protected function setDimensions();
/**
* @brief Return the current image.
*
* @fixme Shouldn't his method be protected, because outside of the current
* driver it makes no sense at all because of the different return values.
*
* @return boolean|resource|\Imagick
* false on failure, a PHP image resource for GD driver, an \Imagick object
* for ImageMagick driver.
*/
abstract public function getImage();
abstract public function doScaleImage($new_width, $new_height);
abstract public function rotate($degrees);
abstract public function flip($horiz = true, $vert = false);
/**
* @brief Crops the image.
*
* @param int $maxx width of the new image
* @param int $maxy height of the new image
* @param int $x x-offset for region
* @param int $y y-offset for region
* @param int $w width of region
* @param int $h height of region
*
* @return boolean|void false on failure
*/
abstract public function cropImageRect($maxx, $maxy, $x, $y, $w, $h);
/**
* @brief Return a binary string from the image resource.
*
* @return string A Binary String.
*/
abstract public function imageString();
abstract public function clearexif();
/**
* @brief PhotoDriver constructor.
*
* @param string $data Image
* @param string $type mimetype
*/
public function __construct($data, $type = '') {
$this->types = $this->supportedTypes();
if(! array_key_exists($type, $this->types)) {
$type = 'image/jpeg';
}
$this->type = $type;
$this->valid = false;
$this->load($data, $type);
}
public function __destruct() {
if($this->is_valid())
$this->destroy();
}
/**
* @brief Is it a valid image object.
*
* @return boolean
*/
public function is_valid() {
return $this->valid;
}
/**
* @brief Get the width of the image.
*
* @return boolean|number Width of image in pixels, or false on failure
*/
public function getWidth() {
if(! $this->is_valid())
return false;
return $this->width;
}
/**
* @brief Get the height of the image.
*
* @return boolean|number Height of image in pixels, or false on failure
*/
public function getHeight() {
if(! $this->is_valid())
return false;
return $this->height;
}
/**
* @brief Saves the image resource to a file in filesystem.
*
* @param string $path Path and filename where to save the image
* @return boolean False on failure, otherwise true
*/
public function saveImage($path) {
if(! $this->is_valid())
return false;
return (file_put_contents($path, $this->imageString()) ? true : false);
}
/**
* @brief Return mimetype of the image resource.
*
* @return boolean|string False on failure, otherwise mimetype.
*/
public function getType() {
if(! $this->is_valid())
return false;
return $this->type;
}
/**
* @brief Return file extension of the image resource.
*
* @return boolean|string False on failure, otherwise file extension.
*/
public function getExt() {
if(! $this->is_valid())
return false;
return $this->types[$this->getType()];
}
/**
* @brief Scale image to max pixel size in either dimension.
*
* @param int $max maximum pixel size in either dimension
* @param boolean $float_height (optional)
* If true allow height to float to any length on tall images, constraining
* only the width
* @return boolean|void false on failure, otherwise void
*/
public function scaleImage($max, $float_height = true) {
if(! $this->is_valid())
return false;
$width = $this->width;
$height = $this->height;
$dest_width = $dest_height = 0;
if((! $width) || (! $height))
return false;
if($width > $max && $height > $max) {
// very tall image (greater than 16:9)
// constrain the width - let the height float.
if(((($height * 9) / 16) > $width) && ($float_height)) {
$dest_width = $max;
$dest_height = intval(($height * $max) / $width);
} // else constrain both dimensions
elseif($width > $height) {
$dest_width = $max;
$dest_height = intval(($height * $max) / $width);
} else {
$dest_width = intval(($width * $max) / $height);
$dest_height = $max;
}
} else {
if($width > $max) {
$dest_width = $max;
$dest_height = intval(($height * $max) / $width);
} else {
if($height > $max) {
// very tall image (greater than 16:9)
// but width is OK - don't do anything
if(((($height * 9) / 16) > $width) && ($float_height)) {
$dest_width = $width;
$dest_height = $height;
} else {
$dest_width = intval(($width * $max) / $height);
$dest_height = $max;
}
} else {
$dest_width = $width;
$dest_height = $height;
}
}
}
$this->doScaleImage($dest_width, $dest_height);
}
public function scaleImageUp($min) {
if(! $this->is_valid()) {
return false;
}
$width = $this->width;
$height = $this->height;
$dest_width = $dest_height = 0;
if((! $width) || (! $height))
return false;
if($width < $min && $height < $min) {
if($width > $height) {
$dest_width = $min;
$dest_height = intval(($height * $min) / $width);
} else {
$dest_width = intval(($width * $min) / $height);
$dest_height = $min;
}
} else {
if($width < $min) {
$dest_width = $min;
$dest_height = intval(($height * $min) / $width);
} else {
if($height < $min) {
$dest_width = intval(($width * $min) / $height);
$dest_height = $min;
} else {
$dest_width = $width;
$dest_height = $height;
}
}
}
$this->doScaleImage($dest_width, $dest_height);
}
/**
* @brief Scales image to a square.
*
* @param int $dim Pixel of square image
* @return boolean|void false on failure, otherwise void
*/
public function scaleImageSquare($dim) {
if(! $this->is_valid())
return false;
$this->doScaleImage($dim, $dim);
}
/**
* @brief Crops a square image.
*
* @see cropImageRect()
*
* @param int $max size of the new image
* @param int $x x-offset for region
* @param int $y y-offset for region
* @param int $w width of region
* @param int $h height of region
*
* @return boolean|void false on failure
*/
public function cropImage($max, $x, $y, $w, $h) {
if(! $this->is_valid())
return false;
$this->cropImageRect($max, $max, $x, $y, $w, $h);
}
/**
* @brief Reads exif data from a given filename.
*
* @param string $filename
* @return boolean|array
*/
public function exif($filename) {
if((! function_exists('exif_read_data'))
|| (! in_array($this->getType(), ['image/jpeg', 'image/tiff'])))
{
return false;
}
/*
* PHP 7.2 allows you to use a stream resource, which should reduce/avoid
* memory exhaustion on large images.
*/
if(version_compare(PHP_VERSION, '7.2.0') >= 0) {
$f = @fopen($filename, 'rb');
} else {
$f = $filename;
}
if($f) {
return @exif_read_data($f, null, true);
}
return false;
}
/**
* @brief Orients current image based on exif orientation information.
*
* @param array $exif
* @return boolean true if oriented, otherwise false
*/
public function orient($exif) {
if(! ($this->is_valid() && $exif)) {
return false;
}
$ort = ((array_key_exists('IFD0', $exif)) ? $exif['IFD0']['Orientation'] : $exif['Orientation']);
if(! $ort) {
return false;
}
switch($ort) {
case 1 : // nothing
break;
case 2 : // horizontal flip
$this->flip();
break;
case 3 : // 180 rotate left
$this->rotate(180);
break;
case 4 : // vertical flip
$this->flip(false, true);
break;
case 5 : // vertical flip + 90 rotate right
$this->flip(false, true);
$this->rotate(-90);
break;
case 6 : // 90 rotate right
$this->rotate(-90);
break;
case 7 : // horizontal flip + 90 rotate right
$this->flip();
$this->rotate(-90);
break;
case 8 : // 90 rotate left
$this->rotate(90);
break;
default :
break;
}
return true;
}
/**
* @brief Save photo to database.
*
* @param array $arr
* @param boolean $skipcheck (optional) default false
* @return boolean|array
*/
public function save($arr, $skipcheck = false) {
if(! ($skipcheck || $this->is_valid())) {
logger('Attempt to store invalid photo.');
return false;
}
$p = [];
$p['aid'] = ((intval($arr['aid'])) ? intval($arr['aid']) : 0);
$p['uid'] = ((intval($arr['uid'])) ? intval($arr['uid']) : 0);
$p['xchan'] = (($arr['xchan']) ? $arr['xchan'] : '');
$p['resource_id'] = (($arr['resource_id']) ? $arr['resource_id'] : '');
$p['filename'] = (($arr['filename']) ? $arr['filename'] : '');
$p['mimetype'] = (($arr['mimetype']) ? $arr['mimetype'] : $this->getType());
$p['album'] = (($arr['album']) ? $arr['album'] : '');
$p['imgscale'] = ((intval($arr['imgscale'])) ? intval($arr['imgscale']) : 0);
$p['allow_cid'] = (($arr['allow_cid']) ? $arr['allow_cid'] : '');
$p['allow_gid'] = (($arr['allow_gid']) ? $arr['allow_gid'] : '');
$p['deny_cid'] = (($arr['deny_cid']) ? $arr['deny_cid'] : '');
$p['deny_gid'] = (($arr['deny_gid']) ? $arr['deny_gid'] : '');
$p['edited'] = (($arr['edited']) ? $arr['edited'] : datetime_convert());
$p['title'] = (($arr['title']) ? $arr['title'] : '');
$p['description'] = (($arr['description']) ? $arr['description'] : '');
$p['photo_usage'] = intval($arr['photo_usage']);
$p['os_storage'] = intval($arr['os_storage']);
$p['os_path'] = $arr['os_path'];
$p['os_syspath'] = ((array_key_exists('os_syspath', $arr)) ? $arr['os_syspath'] : '');
$p['display_path'] = (($arr['display_path']) ? $arr['display_path'] : '');
$p['width'] = (($arr['width']) ? $arr['width'] : $this->getWidth());
$p['height'] = (($arr['height']) ? $arr['height'] : $this->getHeight());
$p['expires'] = (($arr['expires']) ? $arr['expires'] : gmdate('Y-m-d H:i:s', time() + get_config('system', 'photo_cache_time', 86400)));
if(! intval($p['imgscale']))
logger('save: ' . print_r($arr, true), LOGGER_DATA);
$x = q("select id, created from photo where resource_id = '%s' and uid = %d and xchan = '%s' and imgscale = %d limit 1", dbesc($p['resource_id']), intval($p['uid']), dbesc($p['xchan']), intval($p['imgscale']));
if($x) {
$p['created'] = (($x['created']) ? $x['created'] : $p['edited']);
$r = q("UPDATE photo set
aid = %d,
uid = %d,
xchan = '%s',
resource_id = '%s',
created = '%s',
edited = '%s',
filename = '%s',
mimetype = '%s',
album = '%s',
height = %d,
width = %d,
content = '%s',
os_storage = %d,
filesize = %d,
imgscale = %d,
photo_usage = %d,
title = '%s',
description = '%s',
os_path = '%s',
display_path = '%s',
allow_cid = '%s',
allow_gid = '%s',
deny_cid = '%s',
deny_gid = '%s',
expires = '%s'
where id = %d",
intval($p['aid']), intval($p['uid']), dbesc($p['xchan']), dbesc($p['resource_id']), dbescdate($p['created']), dbescdate($p['edited']), dbesc(basename($p['filename'])), dbesc($p['mimetype']), dbesc($p['album']), intval($p['height']), intval($p['width']), (intval($p['os_storage']) ? dbescbin($p['os_syspath']) : dbescbin($this->imageString())), intval($p['os_storage']), (intval($p['os_storage']) ? @filesize($p['os_syspath']) : strlen($this->imageString())), intval($p['imgscale']), intval($p['photo_usage']), dbesc($p['title']), dbesc($p['description']), dbesc($p['os_path']), dbesc($p['display_path']), dbesc($p['allow_cid']), dbesc($p['allow_gid']), dbesc($p['deny_cid']), dbesc($p['deny_gid']), dbescdate($p['expires']), intval($x[0]['id']));
} else {
$p['created'] = (($arr['created']) ? $arr['created'] : $p['edited']);
$r = q("INSERT INTO photo
( aid, uid, xchan, resource_id, created, edited, filename, mimetype, album, height, width, content, os_storage, filesize, imgscale, photo_usage, title, description, os_path, display_path, allow_cid, allow_gid, deny_cid, deny_gid, expires )
VALUES ( %d, %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d, '%s', %d, %d, %d, %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s' )", intval($p['aid']), intval($p['uid']), dbesc($p['xchan']), dbesc($p['resource_id']), dbescdate($p['created']), dbescdate($p['edited']), dbesc(basename($p['filename'])), dbesc($p['mimetype']), dbesc($p['album']), intval($p['height']), intval($p['width']), (intval($p['os_storage']) ? dbescbin($p['os_syspath']) : dbescbin($this->imageString())), intval($p['os_storage']), (intval($p['os_storage']) ? @filesize($p['os_syspath']) : strlen($this->imageString())), intval($p['imgscale']), intval($p['photo_usage']), dbesc($p['title']), dbesc($p['description']), dbesc($p['os_path']), dbesc($p['display_path']), dbesc($p['allow_cid']), dbesc($p['allow_gid']), dbesc($p['deny_cid']), dbesc($p['deny_gid']), dbescdate($p['expires']));
}
logger('Photo save imgscale ' . $p['imgscale'] . ' returned ' . intval($r));
return $r;
}
}
