mirror of
https://github.com/24eme/signaturepdf.git
synced 2023-08-25 09:33:08 +02:00
621 lines
15 KiB
PHP
621 lines
15 KiB
PHP
<?php
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/*
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Copyright (c) 2009-2019 F3::Factory/Bong Cosca, All rights reserved.
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This file is part of the Fat-Free Framework (http://fatfreeframework.com).
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This is free software: you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation, either version 3 of the License, or later.
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Fat-Free Framework is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with Fat-Free Framework. If not, see <http://www.gnu.org/licenses/>.
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*/
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//! Image manipulation tools
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class Image {
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//@{ Messages
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const
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E_Color='Invalid color specified: %s',
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E_File='File not found',
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E_Font='CAPTCHA font not found',
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E_TTF='No TrueType support in GD module',
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E_Length='Invalid CAPTCHA length: %s';
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//@}
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//@{ Positional cues
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const
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POS_Left=1,
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POS_Center=2,
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POS_Right=4,
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POS_Top=8,
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POS_Middle=16,
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POS_Bottom=32;
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//@}
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protected
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//! Source filename
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$file,
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//! Image resource
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$data,
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//! Enable/disable history
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$flag=FALSE,
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//! Filter count
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$count=0;
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/**
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* Convert RGB hex triad to array
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* @return array|FALSE
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* @param $color int|string
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**/
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function rgb($color) {
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if (is_string($color))
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$color=hexdec($color);
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$hex=str_pad($hex=dechex($color),$color<4096?3:6,'0',STR_PAD_LEFT);
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if (($len=strlen($hex))>6)
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user_error(sprintf(self::E_Color,'0x'.$hex),E_USER_ERROR);
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$color=str_split($hex,$len/3);
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foreach ($color as &$hue) {
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$hue=hexdec(str_repeat($hue,6/$len));
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unset($hue);
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}
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return $color;
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}
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/**
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* Invert image
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* @return object
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**/
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function invert() {
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imagefilter($this->data,IMG_FILTER_NEGATE);
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return $this->save();
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}
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/**
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* Adjust brightness (range:-255 to 255)
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* @return object
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* @param $level int
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**/
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function brightness($level) {
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imagefilter($this->data,IMG_FILTER_BRIGHTNESS,$level);
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return $this->save();
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}
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/**
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* Adjust contrast (range:-100 to 100)
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* @return object
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* @param $level int
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**/
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function contrast($level) {
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imagefilter($this->data,IMG_FILTER_CONTRAST,$level);
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return $this->save();
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}
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/**
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* Convert to grayscale
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* @return object
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**/
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function grayscale() {
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imagefilter($this->data,IMG_FILTER_GRAYSCALE);
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return $this->save();
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}
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/**
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* Adjust smoothness
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* @return object
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* @param $level int
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**/
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function smooth($level) {
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imagefilter($this->data,IMG_FILTER_SMOOTH,$level);
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return $this->save();
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}
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/**
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* Emboss the image
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* @return object
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**/
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function emboss() {
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imagefilter($this->data,IMG_FILTER_EMBOSS);
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return $this->save();
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}
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/**
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* Apply sepia effect
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* @return object
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**/
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function sepia() {
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imagefilter($this->data,IMG_FILTER_GRAYSCALE);
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imagefilter($this->data,IMG_FILTER_COLORIZE,90,60,45);
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return $this->save();
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}
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/**
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* Pixelate the image
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* @return object
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* @param $size int
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**/
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function pixelate($size) {
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imagefilter($this->data,IMG_FILTER_PIXELATE,$size,TRUE);
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return $this->save();
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}
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/**
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* Blur the image using Gaussian filter
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* @return object
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* @param $selective bool
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**/
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function blur($selective=FALSE) {
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imagefilter($this->data,
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$selective?IMG_FILTER_SELECTIVE_BLUR:IMG_FILTER_GAUSSIAN_BLUR);
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return $this->save();
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}
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/**
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* Apply sketch effect
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* @return object
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**/
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function sketch() {
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imagefilter($this->data,IMG_FILTER_MEAN_REMOVAL);
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return $this->save();
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}
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/**
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* Flip on horizontal axis
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* @return object
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**/
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function hflip() {
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$tmp=imagecreatetruecolor(
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$width=$this->width(),$height=$this->height());
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imagesavealpha($tmp,TRUE);
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imagefill($tmp,0,0,IMG_COLOR_TRANSPARENT);
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imagecopyresampled($tmp,$this->data,
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0,0,$width-1,0,$width,$height,-$width,$height);
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imagedestroy($this->data);
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$this->data=$tmp;
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return $this->save();
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}
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/**
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* Flip on vertical axis
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* @return object
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**/
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function vflip() {
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$tmp=imagecreatetruecolor(
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$width=$this->width(),$height=$this->height());
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imagesavealpha($tmp,TRUE);
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imagefill($tmp,0,0,IMG_COLOR_TRANSPARENT);
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imagecopyresampled($tmp,$this->data,
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0,0,0,$height-1,$width,$height,$width,-$height);
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imagedestroy($this->data);
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$this->data=$tmp;
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return $this->save();
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}
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/**
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* Crop the image
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* @return object
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* @param $x1 int
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* @param $y1 int
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* @param $x2 int
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* @param $y2 int
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**/
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function crop($x1,$y1,$x2,$y2) {
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$tmp=imagecreatetruecolor($width=$x2-$x1+1,$height=$y2-$y1+1);
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imagesavealpha($tmp,TRUE);
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imagefill($tmp,0,0,IMG_COLOR_TRANSPARENT);
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imagecopyresampled($tmp,$this->data,
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0,0,$x1,$y1,$width,$height,$width,$height);
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imagedestroy($this->data);
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$this->data=$tmp;
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return $this->save();
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}
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/**
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* Resize image (Maintain aspect ratio); Crop relative to center
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* if flag is enabled; Enlargement allowed if flag is enabled
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* @return object
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* @param $width int
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* @param $height int
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* @param $crop bool
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* @param $enlarge bool
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**/
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function resize($width=NULL,$height=NULL,$crop=TRUE,$enlarge=TRUE) {
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if (is_null($width) && is_null($height))
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return $this;
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$origw=$this->width();
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$origh=$this->height();
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if (is_null($width))
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$width=round(($height/$origh)*$origw);
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if (is_null($height))
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$height=round(($width/$origw)*$origh);
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// Adjust dimensions; retain aspect ratio
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$ratio=$origw/$origh;
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if (!$crop) {
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if ($width/$ratio<=$height)
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$height=round($width/$ratio);
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else
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$width=round($height*$ratio);
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}
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if (!$enlarge) {
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$width=min($origw,$width);
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$height=min($origh,$height);
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}
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// Create blank image
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$tmp=imagecreatetruecolor($width,$height);
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imagesavealpha($tmp,TRUE);
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imagefill($tmp,0,0,IMG_COLOR_TRANSPARENT);
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// Resize
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if ($crop) {
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if ($width/$ratio<=$height) {
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$cropw=round($origh*$width/$height);
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imagecopyresampled($tmp,$this->data,
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0,0,round(($origw-$cropw)/2),0,$width,$height,$cropw,$origh);
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}
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else {
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$croph=round($origw*$height/$width);
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imagecopyresampled($tmp,$this->data,
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0,0,0,round(($origh-$croph)/2),$width,$height,$origw,$croph);
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}
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}
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else
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imagecopyresampled($tmp,$this->data,
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0,0,0,0,$width,$height,$origw,$origh);
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imagedestroy($this->data);
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$this->data=$tmp;
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return $this->save();
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}
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/**
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* Rotate image
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* @return object
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* @param $angle int
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**/
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function rotate($angle) {
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$this->data=imagerotate($this->data,$angle,
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imagecolorallocatealpha($this->data,0,0,0,127));
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imagesavealpha($this->data,TRUE);
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return $this->save();
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}
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/**
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* Apply an image overlay
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* @return object
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* @param $img object
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* @param $align int|array
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* @param $alpha int
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**/
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function overlay(Image $img,$align=NULL,$alpha=100) {
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if (is_null($align))
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$align=self::POS_Right|self::POS_Bottom;
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if (is_array($align)) {
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list($posx,$posy)=$align;
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$align = 0;
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}
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$ovr=imagecreatefromstring($img->dump());
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imagesavealpha($ovr,TRUE);
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$imgw=$this->width();
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$imgh=$this->height();
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$ovrw=imagesx($ovr);
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$ovrh=imagesy($ovr);
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if ($align & self::POS_Left)
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$posx=0;
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if ($align & self::POS_Center)
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$posx=round(($imgw-$ovrw)/2);
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if ($align & self::POS_Right)
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$posx=$imgw-$ovrw;
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if ($align & self::POS_Top)
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$posy=0;
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if ($align & self::POS_Middle)
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$posy=round(($imgh-$ovrh)/2);
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if ($align & self::POS_Bottom)
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$posy=$imgh-$ovrh;
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if (empty($posx))
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$posx=0;
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if (empty($posy))
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$posy=0;
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if ($alpha==100)
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imagecopy($this->data,$ovr,$posx,$posy,0,0,$ovrw,$ovrh);
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else {
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$cut=imagecreatetruecolor($ovrw,$ovrh);
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imagecopy($cut,$this->data,0,0,$posx,$posy,$ovrw,$ovrh);
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imagecopy($cut,$ovr,0,0,0,0,$ovrw,$ovrh);
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imagecopymerge($this->data,
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$cut,$posx,$posy,0,0,$ovrw,$ovrh,$alpha);
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}
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return $this->save();
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}
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/**
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* Generate identicon
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* @return object
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* @param $str string
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* @param $size int
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* @param $blocks int
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**/
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function identicon($str,$size=64,$blocks=4) {
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$sprites=[
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[.5,1,1,0,1,1],
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[.5,0,1,0,.5,1,0,1],
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[.5,0,1,0,1,1,.5,1,1,.5],
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[0,.5,.5,0,1,.5,.5,1,.5,.5],
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[0,.5,1,0,1,1,0,1,1,.5],
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[1,0,1,1,.5,1,1,.5,.5,.5],
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[0,0,1,0,1,.5,0,0,.5,1,0,1],
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[0,0,.5,0,1,.5,.5,1,0,1,.5,.5],
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[.5,0,.5,.5,1,.5,1,1,.5,1,.5,.5,0,.5],
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[0,0,1,0,.5,.5,1,.5,.5,1,.5,.5,0,1],
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[0,.5,.5,1,1,.5,.5,0,1,0,1,1,0,1],
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[.5,0,1,0,1,1,.5,1,1,.75,.5,.5,1,.25],
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[0,.5,.5,0,.5,.5,1,0,1,.5,.5,1,.5,.5,0,1],
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[0,0,1,0,1,1,0,1,1,.5,.5,.25,.5,.75,0,.5,.5,.25],
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[0,.5,.5,.5,.5,0,1,0,.5,.5,1,.5,.5,1,.5,.5,0,1],
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[0,0,1,0,.5,.5,.5,0,0,.5,1,.5,.5,1,.5,.5,0,1]
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];
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$hash=sha1($str);
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$this->data=imagecreatetruecolor($size,$size);
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list($r,$g,$b)=$this->rgb(hexdec(substr($hash,-3)));
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$fg=imagecolorallocate($this->data,$r,$g,$b);
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imagefill($this->data,0,0,IMG_COLOR_TRANSPARENT);
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$ctr=count($sprites);
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$dim=$blocks*floor($size/$blocks)*2/$blocks;
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for ($j=0,$y=ceil($blocks/2);$j<$y;++$j)
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for ($i=$j,$x=$blocks-1-$j;$i<$x;++$i) {
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$sprite=imagecreatetruecolor($dim,$dim);
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imagefill($sprite,0,0,IMG_COLOR_TRANSPARENT);
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$block=$sprites[hexdec($hash[($j*$blocks+$i)*2])%$ctr];
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for ($k=0,$pts=count($block);$k<$pts;++$k)
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$block[$k]*=$dim;
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if (version_compare(PHP_VERSION, '8.1.0') >= 0) {
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imagefilledpolygon($sprite,$block,$fg);
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} else {
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imagefilledpolygon($sprite,$block,$pts/2,$fg);
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}
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for ($k=0;$k<4;++$k) {
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imagecopyresampled($this->data,$sprite,
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round($i*$dim/2),round($j*$dim/2),0,0,round($dim/2),round($dim/2),$dim,$dim);
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$this->data=imagerotate($this->data,90,
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imagecolorallocatealpha($this->data,0,0,0,127));
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}
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imagedestroy($sprite);
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}
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imagesavealpha($this->data,TRUE);
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return $this->save();
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}
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/**
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* Generate CAPTCHA image
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* @return object|FALSE
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* @param $font string
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* @param $size int
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* @param $len int
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* @param $key string
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* @param $path string
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* @param $fg int
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* @param $bg int
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**/
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function captcha($font,$size=24,$len=5,
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$key=NULL,$path='',$fg=0xFFFFFF,$bg=0x000000) {
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if ((!$ssl=extension_loaded('openssl')) && ($len<4 || $len>13)) {
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user_error(sprintf(self::E_Length,$len),E_USER_ERROR);
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return FALSE;
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}
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if (!function_exists('imagettftext')) {
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user_error(self::E_TTF,E_USER_ERROR);
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return FALSE;
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}
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$fw=Base::instance();
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foreach ($fw->split($path?:$fw->UI.';./') as $dir)
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if (is_file($path=$dir.$font)) {
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$seed=strtoupper(substr(
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$ssl?bin2hex(openssl_random_pseudo_bytes($len)):uniqid(),
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-$len));
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$block=$size*3;
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$tmp=[];
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for ($i=0,$width=0,$height=0;$i<$len;++$i) {
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// Process at 2x magnification
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$box=imagettfbbox($size*2,0,$path,$seed[$i]);
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$w=$box[2]-$box[0];
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$h=$box[1]-$box[5];
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$char=imagecreatetruecolor($block,$block);
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imagefill($char,0,0,$bg);
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imagettftext($char,$size*2,0,
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round(($block-$w)/2),round($block-($block-$h)/2),
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$fg,$path,$seed[$i]);
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$char=imagerotate($char,mt_rand(-30,30),
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imagecolorallocatealpha($char,0,0,0,127));
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// Reduce to normal size
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$tmp[$i]=imagecreatetruecolor(
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round(($w=imagesx($char))/2),round(($h=imagesy($char))/2));
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imagefill($tmp[$i],0,0,IMG_COLOR_TRANSPARENT);
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imagecopyresampled($tmp[$i],
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$char,0,0,0,0,round($w/2),round($h/2),$w,$h);
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imagedestroy($char);
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$width+=$i+1<$len?$block/2:$w/2;
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$height=max($height,$h/2);
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}
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$this->data=imagecreatetruecolor(round($width),round($height));
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imagefill($this->data,0,0,IMG_COLOR_TRANSPARENT);
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for ($i=0;$i<$len;++$i) {
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imagecopy($this->data,$tmp[$i],
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round($i*$block/2),round(($height-imagesy($tmp[$i]))/2),0,0,
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imagesx($tmp[$i]),imagesy($tmp[$i]));
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imagedestroy($tmp[$i]);
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}
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imagesavealpha($this->data,TRUE);
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if ($key)
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$fw->$key=$seed;
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return $this->save();
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}
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user_error(self::E_Font,E_USER_ERROR);
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return FALSE;
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}
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|
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/**
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* Return image width
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* @return int
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**/
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function width() {
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return imagesx($this->data);
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}
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/**
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* Return image height
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* @return int
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**/
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function height() {
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return imagesy($this->data);
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}
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|
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/**
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* Send image to HTTP client
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* @return NULL
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**/
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function render() {
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$args=func_get_args();
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$format=$args?array_shift($args):'png';
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if (PHP_SAPI!='cli') {
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header('Content-Type: image/'.$format);
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header('X-Powered-By: '.Base::instance()->PACKAGE);
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}
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call_user_func_array(
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'image'.$format,
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array_merge([$this->data,NULL],$args)
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);
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}
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|
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/**
|
|
* Return image as a string
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* @return string
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**/
|
|
function dump() {
|
|
$args=func_get_args();
|
|
$format=$args?array_shift($args):'png';
|
|
ob_start();
|
|
call_user_func_array(
|
|
'image'.$format,
|
|
array_merge([$this->data,NULL],$args)
|
|
);
|
|
return ob_get_clean();
|
|
}
|
|
|
|
/**
|
|
* Return image resource
|
|
* @return resource
|
|
**/
|
|
function data() {
|
|
return $this->data;
|
|
}
|
|
|
|
/**
|
|
* Save current state
|
|
* @return object
|
|
**/
|
|
function save() {
|
|
$fw=Base::instance();
|
|
if ($this->flag) {
|
|
if (!is_dir($dir=$fw->TEMP))
|
|
mkdir($dir,Base::MODE,TRUE);
|
|
++$this->count;
|
|
$fw->write($dir.'/'.$fw->SEED.'.'.
|
|
$fw->hash($this->file).'-'.$this->count.'.png',
|
|
$this->dump());
|
|
}
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Revert to specified state
|
|
* @return object
|
|
* @param $state int
|
|
**/
|
|
function restore($state=1) {
|
|
$fw=Base::instance();
|
|
if ($this->flag && is_file($file=($path=$fw->TEMP.
|
|
$fw->SEED.'.'.$fw->hash($this->file).'-').$state.'.png')) {
|
|
if (is_resource($this->data))
|
|
imagedestroy($this->data);
|
|
$this->data=imagecreatefromstring($fw->read($file));
|
|
imagesavealpha($this->data,TRUE);
|
|
foreach (glob($path.'*.png',GLOB_NOSORT) as $match)
|
|
if (preg_match('/-(\d+)\.png/',$match,$parts) &&
|
|
$parts[1]>$state)
|
|
@unlink($match);
|
|
$this->count=$state;
|
|
}
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Undo most recently applied filter
|
|
* @return object
|
|
**/
|
|
function undo() {
|
|
if ($this->flag) {
|
|
if ($this->count)
|
|
$this->count--;
|
|
return $this->restore($this->count);
|
|
}
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Load string
|
|
* @return object|FALSE
|
|
* @param $str string
|
|
**/
|
|
function load($str) {
|
|
if (!$this->data=@imagecreatefromstring($str))
|
|
return FALSE;
|
|
imagesavealpha($this->data,TRUE);
|
|
$this->save();
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Instantiate image
|
|
* @param $file string
|
|
* @param $flag bool
|
|
* @param $path string
|
|
**/
|
|
function __construct($file=NULL,$flag=FALSE,$path=NULL) {
|
|
$this->flag=$flag;
|
|
if ($file) {
|
|
$fw=Base::instance();
|
|
// Create image from file
|
|
$this->file=$file;
|
|
if (!isset($path))
|
|
$path=$fw->UI.';./';
|
|
foreach ($fw->split($path,FALSE) as $dir)
|
|
if (is_file($dir.$file))
|
|
return $this->load($fw->read($dir.$file));
|
|
user_error(self::E_File,E_USER_ERROR);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Wrap-up
|
|
* @return NULL
|
|
**/
|
|
function __destruct() {
|
|
if (is_resource($this->data)) {
|
|
imagedestroy($this->data);
|
|
$fw=Base::instance();
|
|
$path=$fw->TEMP.$fw->SEED.'.'.$fw->hash($this->file);
|
|
if ($glob=@glob($path.'*.png',GLOB_NOSORT))
|
|
foreach ($glob as $match)
|
|
if (preg_match('/-(\d+)\.png/',$match))
|
|
@unlink($match);
|
|
}
|
|
}
|
|
|
|
}
|