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<?php
/**
* LiveImage, library for workin with images.
* (c) Alex Kachayev, http://www.kachayev.ru
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* See http://www.gnu.org/copyleft/lesser.html
*
* LiveImage:
* Main functions for resize, crop and stylize your picture.
*
* @author Alex Kachayev
* @version 1.2
* @package LiveImage
*/
class LiveImage {
/**
* Image object handler
*
* @var object
*/
protected $image=null;
/**
* @var bool
*/
protected $truecolor=true;
/**
* @var int
*/
protected $width=0;
/**
* @var int
*/
protected $height=0;
/**
* Color param (RGB code)
*
* @var array
*/
protected $color=array('r'=>255,'g'=>255,'b'=>255);
/**
* Pixel font size
*
* @var int
*/
protected $font_size=20;
/**
* Font name for making image labels.
* For saving true type fonts use /font directory.
*
* @var string
*/
protected $font='';
/**
* Resizing scale
*
* @var int
*/
protected $scale = 1;
/**
* Format of image file\object
*
* @var string
*/
protected $format='';
/**
* Quality of output JPG image
*
* @var int
*/
protected $jpg_quality = null;
/**
* Error texts
*
* @var array
*/
protected $error_messages = array(
1 => 'Can`t create image',
2 => 'No font was given',
3 => 'No file was given',
4 => 'Can`t open image from file',
5 => 'Unknown file format given',
6 => 'Failed image resource given'
);
/**
* Last error text
*
* @var strng
*/
protected $last_err_text='';
/**
* Last error code
*
* @var int
*/
protected $last_err_num=0;
/**
* Создает объект изображения из переданного файла
*
* @param string $file
* @return bool
*/
public function __construct($file) {
if(!$file || !($size=getimagesize($file))) {
$this->set_last_error(3);
return false;
}
/**
* Определяем тип файла изображения
*/
switch ($size['mime']) {
case 'image/png':
case "image/x-png":
$tmp=imagecreatefrompng($file);
$this->format='png';
break;
case 'image/gif':
$tmp=imagecreatefromgif($file);
$this->format='gif';
break;
case "image/pjpeg":
case "image/jpeg":
case "image/jpg":
$tmp=imagecreatefromjpeg($file);
$this->format='jpg';
break;
default:
$this->set_last_error(5);
return false;
}
/**
* Если изображение не удалось создать
*/
if(!$tmp){
$this->set_last_error(4);
return false;
}
$this->image=$tmp;
$this->width=$size[0];
$this->height=$size[1];
$this->truecolor=true;
return true;
}
/**
* Resize handle image
*
* @param int $width
* @param int $height
* @param int $src_resize
* @param int $scale
* @return mixed
*/
public function resize($width=null,$height=null,$scale=false,$alfa=true) {
$this->clear_error();
/**
* Если не указана новая высота, значит применяем масштабирование.
* Если не указана ширина, то "забираем" ширину исходного.
*/
$height=(!$height)?1:$height;
$width=(!$width)?$this->width:$width;
if( $scale ){
$scale_x = $this->width / $width;
$scale_y = $this->height / $height;
$this->scale = min($scale_x, $scale_y);
$width = round($this->width / $this->scale);
$height = round($this->height / $this->scale);
}
$tmp=($this->truecolor)
? imagecreatetruecolor($width,$height)
: imagecreate($width,$height);
/**
* Если темп-изображение не создано, ставим отметку об ошикбе
*/
if(!$tmp) {
$this->set_last_error(1);
return false;
}
if($this->format=='gif') {
imagealphablending($this->image, false);
$ct = @imagecolortransparent($this->image);
$color_tran = @imagecolorsforindex($this->image, $ct);
if($color_tran) {
$ct2 = imagecolorexact($tmp, $color_tran['red'], $color_tran['green'], $color_tran['blue']);
imagefill($tmp,0,0,$ct2);
}
/**
* Определяем функцию, которой будет выполнен ресайз изображения
*/
$sResizeFunction = 'imagecopyresampled';
if(!function_exists($sResizeFunction)) $sResizeFunction = 'imagecopyresized';
if(isset($ct) and $ct!=-1) $sResizeFunction = 'imagecopyresized';
if(!@$sResizeFunction($tmp,$this->image,0,0,0,0,$width,$height,$this->width,$this->height)) {
imagedestroy($tmp);
return false;
}
imagesavealpha($tmp, true);
if(isset($ct2)) imagecolortransparent($tmp, $ct2);
} else {
/**
* Регулируем альфа-канал, если не указано обработное
*/
if($alfa) {
@imagesavealpha($tmp,true);
@imagealphablending($tmp,false);
}
if(!@imagecopyresampled($tmp,$this->image,0,0,0,0,$width,$height,$this->width,$this->height)) {
imagedestroy($tmp);
return false;
}
}
imagedestroy($this->image);
$this->set_image($tmp);
return true;
}
/**
* Crop image
*
* @param int $width
* @param int $height
* @param int $start_width
* @param int $start_height
* @return mixed
*/
public function crop($width, $height, $start_width, $start_height) {
$tmp=($this->truecolor)
? imagecreatetruecolor($width,$height)
: imagecreate($width,$height);
/**
* Если темп-изображение не создано, ставим отметку об ошикбе
*/
if(!$tmp) {
$this->set_last_error(1);
return false;
}
if($this->format=='gif') {
imagealphablending($this->image, false);
$ct = @imagecolortransparent($this->image);
$color_tran = @imagecolorsforindex($this->image, $ct);
if($color_tran) {
$ct2 = imagecolorexact($tmp, $color_tran['red'], $color_tran['green'], $color_tran['blue']);
imagefill($tmp,0,0,$ct2);
}
/**
* Определяем функцию, которой будет выполнен ресайз изображения
*/
$sResizeFunction = 'imagecopyresampled';
if(!function_exists($sResizeFunction)) $sResizeFunction = 'imagecopyresized';
if(isset($ct) and $ct!=-1) $sResizeFunction = 'imagecopyresized';
if(!@$sResizeFunction($tmp,$this->image,0,0,$start_width,$start_height,$width,$height,$width,$height)) {
imagedestroy($tmp);
return false;
}
imagesavealpha($tmp, true);
if(isset($ct2)) imagecolortransparent($tmp, $ct2);
} else {
@imagesavealpha($tmp,true);
@imagealphablending($tmp,false);
if(!imagecopyresampled($tmp,$this->image,0,0,$start_width,$start_height,$width,$height,$width,$height)) {
imagedestroy($tmp);
return false;
}
}
imagedestroy($this->image);
$this->set_image($tmp);
return true;
}
/**
* Return image object
*
* @return mixed
*/
public function get_image() {
return $this->image;
}
/**
* Add new image object to current handler
*
* @param resource $image_res
* @return bool
*
* @todo Find format of given image
*/
public function set_image($image_res) {
if (intval(@imagesx($image_res)) > 0) {
$this->image=$image_res;
$this->width=imagesx($image_res);
$this->height=imagesy($image_res);
return true;
}
$this->set_last_error(6);
return false;
}
/**
* Return image params
*
* @param string $key
* @return array
*/
public function get_image_params($key=null) {
$params=array(
'width' => $this->width,
'height' => $this->height,
'truecolor' => $this->truecolor,
'format' => $this->format
);
if(is_null($key)) {
return $params;
}
if(array_key_exists($key,$params)){
return $params[$key];
}
return false;
}
/**
* Setter for font params
*
* @param string $font_size
* @param int $font_angle
* @param string $name
*/
public function set_font($font_size=20,$font_angle=0,$name='') {
if($name) {
$this->font=$name;
}
$this->font_size=$font_size;
$this->font_angle=$font_angle;
}
/**
* Setter for color
*
* @param int $r
* @param int $g
* @param int $b
* @param bool $transparency
*
* @return mixed
*/
public function set_color($r=255,$g=255,$b=255,$transparency=false) {
$this->color=array('r'=>$r,'g'=>$g,'b'=>$b);
if(!$transparency) {
$this->color['locate']=imagecolorallocate($this->image,$this->color['r'],$this->color['g'],$this->color['b']);
} else {
$this->color['locate']=imagecolorallocatealpha($this->image,$this->color['r'],$this->color['g'],$this->color['b'],$transparency);
}
return $this->color['locate'];
}
/**
* Set JPG output quality
*
* @param int $quality
* @return null
*/
public function set_jpg_quality($quality=null) {
$this->jpg_quality = $quality;
}
/**
* Make true type font text label on image
*
* @param string $text
* @param int $x
* @param int $y
* @param bool $unicode
* @param int $letter_space
* @return bool
*/
public function ttf_text($text,$x=0,$y=0,$unicode=false,$letter_space=20) {
$this->clear_error();
if(!$this->font) {
$this->set_last_error(2);
return false;
}
if($unicode) {
$text=$this->to_unicode($text);
}
return imagettftext($this->image,$this->font_size,$this->font_angle,$x,$y,$this->color['locate'],$this->font,$text);
}
/**
* Create text watermark
*
* @param string $text
* @param array $position
* @param array $font_color
* @param array $bg_color
* @param int $font_alpha
* @param int $bg_alfa
* @return bool
*/
public function watermark($text, $position=array(0,24), $font_color=array(255, 255, 255), $bg_color=array(0,0,0), $font_alpha=0, $bg_alfa=40 ){
$text = " ".$text." ";
list($r_font, $g_font, $b_font) = $font_color;
list($r_bg, $g_bg, $b_bg) = $bg_color;
list($x, $y) = $position;
/// Вычисляем размер надписи
/// Наносим фон надписи согласно расчетам размера и позиции
$box = imagettfbbox($this->font_size, 0, $this->font, $text);
/// Производим замену отрицательных кодов в позиции
/// и кодов вида 1/2 - центрирование относительно оси
if(substr_count($x, '-')==1) {
$x = $this->width-abs($box[4])-10-substr_replace($x, '', 0, 1);
} elseif($x=='1/2') {
$x=round(($this->width-abs($box[4]))/2)-5;
}
if(substr_count($y, '-')==1) {
$y = $this->height-abs($box[5])-10-substr_replace($y, '', 0, 1);
} elseif($y=='1/2') {
$y=round(($this->height-abs($box[5]))/2)-5;
}
/// Наносим фон для будущей надписи
$this->set_color($r_bg, $g_bg, $b_bg, $bg_alfa);
imagefilledrectangle($this->image,$x,$y,$x+abs($box[4])+10,$y+abs($box[5])+10,$this->color['locate']);
/// Наносим надпись водянного знака
$this->set_color($r_font, $g_font, $b_font, $font_alpha);
imagettftext($this->image, $this->font_size, 0, $x+5, $y+abs($box[5])+5, $this->color['locate'], $this->font, $text);
return true;
}
/**
* Make rounded corners
*
* @param int $radius
* @param int $rate
* @return bool
*/
public function round_corners($radius=5, $rate=5) {
imagealphablending($this->image, false);
imagesavealpha($this->image, true);
$rs_radius = $radius * $rate;
$rs_size = $rs_radius * 2;
$corner = imagecreatetruecolor($rs_size, $rs_size);
imagealphablending($corner, false);
$trans = imagecolorallocatealpha($corner, 255, 255, 255, 0);
imagefill($corner, 0, 0, $trans);
$positions = array(
array(0, 0, 0, 0),
array($rs_radius, 0, $this->width - $radius, 0),
array($rs_radius, $rs_radius, $this->width - $radius, $this->height - $radius),
array(0, $rs_radius, 0, $this->height - $radius),
);
foreach ($positions as $pos) {
imagecopyresampled($corner, $this->image, $pos[0], $pos[1], $pos[2], $pos[3], $rs_radius, $rs_radius, $radius, $radius);
}
$lx = $ly = 0;
$i = -$rs_radius;
$y2 = -$i;
$r_2 = $rs_radius * $rs_radius;
for (; $i <= $y2; $i++) {
$y = $i;
$x = sqrt($r_2 - $y * $y);
$y += $rs_radius;
$x += $rs_radius;
imageline($corner, $x, $y, $rs_size, $y, $trans);
imageline($corner, 0, $y, $rs_size - $x, $y, $trans);
$lx = $x;
$ly = $y;
}
foreach ($positions as $i => $pos) {
imagecopyresampled($this->image, $corner, $pos[2], $pos[3], $pos[0], $pos[1], $radius, $radius, $rs_radius, $rs_radius);
}
imagedestroy($corner);
return true;
}
/**
* Make image output in file or in browser.
* Can output image in one of this formats: png, gif, jpg.
* If you don`t give format, it will use
* the format of image object.
*
* @param string $format
* @param string $file
*/
public function output($format=null,$file=null) {
/**
* Если формат не указан, значит сохраняем формат исходного объекта
*/
if(is_null($format)) {
$format=$this->format;
}
/**
* Производим преобразование и отдаем результат
*/
switch($format) {
default:
case 'png':
@imagesavealpha($this->image,true);
if(!$file) {
header("Content-type: image/png");
imagepng($this->image);
} else {
imagepng($this->image,$file);
}
break;
case 'jpg':
if(!$file) {
header("Content-type: image/jpeg");
imagejpeg($this->image);
} else {
imagejpeg($this->image,$file,$this->jpg_quality);
}
break;
case 'gif':
if(!$file) {
header("Content-type: image/gif");
imagegif($this->image);
} else {
imagegif($this->image,$file);
}
break;
}
}
public function paste_image($file,$copyresized=false,$position=array(0,0),$src_x=0,$src_y=0,$src_w=-1,$src_h=-1,$dst_w=-1,$dst_h=-1) {
$this->clear_error();
if(!$file || !($size=getimagesize($file))) {
$this->set_last_error(3);
return false;
}
/**
* Определяем тип файла изображения
*/
switch ($size['mime']) {
case 'image/png':
case "image/x-png":
$tmp=imagecreatefrompng($file);
break;
case 'image/gif':
$tmp=imagecreatefromgif($file);
break;
case "image/pjpeg":
case "image/jpeg":
case "image/jpg":
$tmp=imagecreatefromjpeg($file);
break;
default:
$this->set_last_error(5);
return false;
}
if(!$tmp) {
$this->set_last_error(4);
return false;
}
if($copyresized) {
$dst_w = round(imagesx($tmp)/$this->scale);
$dst_h = round(imagesy($tmp)/$this->scale);
}
$dst_w=$dst_w<0 ? imagesx($tmp) : $dst_w;
$dst_h=$dst_h<0 ? imagesy($tmp) : $dst_h;
$src_w=$src_w<0 ? imagesx($tmp) : $src_w;
$src_h=$src_h<0 ? imagesy($tmp) : $src_h;
list($dst_x, $dst_y) = $position;
/// Производим замену отрицательных кодов в позиции
/// и кодов вида 1/2 - центрирование относительно оси
if(substr_count($dst_x, '-')==1) {
$dst_x = $this->width-$dst_w-substr_replace($dst_x, '', 0, 1);
} elseif($dst_x=='1/2') {
$dst_x=round(($this->width-$dst_w)/2);
}
if(substr_count($dst_y, '-')==1) {
$dst_y = $this->height-$dst_h-substr_replace($dst_y, '', 0, 1);
} elseif($dst_y=='1/2') {
$dst_y=round(($this->height-$dst_h)/2);
}
if($copyresized) {
$ret=imagecopyresampled($this->image,$tmp,$dst_x,$dst_y,$src_x,$src_y,$dst_w,$dst_h,$src_w,$src_h);
} else {
$ret=imagecopy($this->image,$tmp,$dst_x,$dst_y,$src_x,$src_y,$src_w,$src_h);
}
imagedestroy($tmp);
return $ret;
}
public function rgb($r=255,$g=255,$b=255) {
return imagecolorallocate($this->image,$r,$g,$b);
}
public function set_last_error($id) {
$this->last_err_text = $this->error_messages[$id];
$this->last_err_num = $id;
}
public function get_last_error() {
return empty($this->last_err_num) ? false : $this->last_err_text;
}
public function clear_error() {
$this->last_err_text='';
$this->last_err_num=0;
}
/**
* Convert string to unicode for making text label using true type font.
*
* @param string $text
* @param string $from
* @return string
*/
protected function to_unicode($text,$from='w') {
$text=convert_cyr_string($text,$from,'i');
$uni='';
for($i=0, $len=strlen($text); $i<$len; $i++)
{
$char=$text{$i};
$code=ord($char);
$uni.=($code>175) ? "&#".(1040+($code-176)).";" : $char;
}
return $uni;
}
public function destroy_all() {
if(imagedestroy($this->image))
$this->image=null;
return true;
}
}
?>