Image.php
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<?php
/*
PHPRtfLite
Copyright 2007-2008 Denis Slaveckij <sinedas@gmail.com>
Copyright 2010-2012 Steffen Zeidler <sigma_z@sigma-scripts.de>
This file is part of PHPRtfLite.
PHPRtfLite 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 3 of the License, or
(at your option) any later version.
PHPRtfLite is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with PHPRtfLite. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* Class for displaying images in rtf documents.
* @version 1.2
* @author Denis Slaveckij <sinedas@gmail.com>
* @author Steffen Zeidler <sigma_z@sigma-scripts.de>
* @copyright 2007-2008 Denis Slaveckij, 2010-2012 Steffen Zeidler
* @package PHPRtfLite
*/
abstract class PHPRtfLite_Image
{
/**
* class constants for image type
*/
const TYPE_JPEG = 'jpeg';
const TYPE_PNG = 'png';
const TYPE_WMF = 'wmf';
/**
* rtf document
* @var PHPRtfLite
*/
protected $_rtf;
/**
* stream as php resource
* @var resource
*/
protected $_stream;
/**
* par format
* @var PHPRtfLite_ParFormat
*/
protected $_parFormat;
/**
* rtf border
* @var PHPRtfLite_Border
*/
protected $_border;
/**
* resize to width
* @var float
*/
protected $_width;
/**
* resize to height
* @var float
*/
protected $_height;
/**
* original image width
* @var float
*/
protected $_imageWidth;
/**
* original image height
* @var integer
*/
protected $_imageHeight;
/**
* image rtf type
* @var string
*/
protected $_imageRtfType;
/**
* flag, true if image file is missing
* @var type
*/
protected $_isMissing = false;
/**
* constructor
*
* @param PHPRtfLite $rtf
* @param resource $stream
* @param float $width optional
* @param float $height optional
*/
public function __construct(PHPRtfLite $rtf, $stream, $width = null, $height = null)
{
$this->_rtf = $rtf;
$this->_stream = $stream;
$this->_width = $width;
$this->_height = $height;
}
/**
* destructor - closes stream
*/
public function __destruct()
{
fclose($this->_stream);
}
/**
* sets paragraph format for image
*
* @param PHPRtfLite_ParFormat $parFormat
*/
public function setParFormat(PHPRtfLite_ParFormat $parFormat)
{
$this->_parFormat = $parFormat;
$parFormat->setColorTable($this->_rtf->getColorTable());
}
/**
* gets paragraph format for image
*
* @return PHPRtfLite_ParFormat
*/
public function getParFormat()
{
return $this->_parFormat;
}
/**
* sets image width
*
* @param float $width if not defined image is displayed by it's height.
*/
public function setWidth($width)
{
$this->_width = $width;
}
/**
* gets image width
*
* @return float
*/
public function getWidth()
{
return $this->_width;
}
/**
* sets image height
*
* @param float $height if not defined image is displayed by it's width.
*/
public function setHeight($height)
{
$this->_height = $height;
}
/**
* gets image height
*
* @return float
*/
public function getHeight()
{
return $this->_height;
}
/**
* sets border
*
* @param PHPRtfLite_Border $border
*/
public function setBorder(PHPRtfLite_Border $border)
{
$this->_border = $border;
}
/**
* gets border
*
* @return PHPRtfLite_Border
*/
public function getBorder()
{
return $this->_border;
}
public function isMissing()
{
return $this->_isMissing;
}
public function setIsMissing()
{
$this->_isMissing = true;
}
/**
* gets rtf image width
*
* @return integer
*/
private function getImageRtfWidth()
{
if ($this->_width > 0) {
return PHPRtfLite_Unit::getUnitInTwips($this->_width);
}
$imageWidth = $this->_imageWidth ? $this->_imageWidth : 100;
if ($this->_height > 0) {
$imageHeight = $this->_imageHeight ? $this->_imageHeight : 100;
$width = ($imageWidth / $imageHeight) * $this->_height;
return PHPRtfLite_Unit::getUnitInTwips($width);
}
return PHPRtfLite_Unit::getPointsInTwips($imageWidth);
}
/**
* gets rtf image height
*
* @return integer
*/
private function getImageRtfHeight()
{
if ($this->_height > 0) {
return PHPRtfLite_Unit::getUnitInTwips($this->_height);
}
$imageHeight = $this->_imageHeight ? $this->_imageHeight : 100;
if ($this->_width > 0) {
$imageWidth = $this->_imageWidth ? $this->_imageWidth : 100;
$height = ($imageHeight /$imageWidth) * $this->_width;
return PHPRtfLite_Unit::getUnitInTwips($height);
}
return PHPRtfLite_Unit::getPointsInTwips($imageHeight);
}
/**
* adds rtf image code to show that the file is missing
*/
private static function getMissingImage()
{
$string = 'iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAIAAAAC64paAAAAAXNSR0IArs4c6QAAAAlwSFlzAAALEwAA'
. 'CxMBAJqcGAAAAAd0SU1FB9gMGgoaGog16G8AAAAZdEVYdENvbW1lbnQAQ3JlYXRlZCB3aXRoIEdJTVBX'
. 'gQ4XAAAAfUlEQVQ4y62TsQ3AIAwEnRcSc2T/eVIzR7p0yAn+N4K4xD49cHBctl7FzM57hWzVsBHs4Fat'
. '1TzNz2BsC5Im95OHfF/0F/RKZnxIBtseeUYG8IcXZAyPo+wh/ORZWGH+oK1of0h9Ch4zPhmPlBQ8tCTd'
. 'KjMYm9nyXPQ31PUAECcxtbZxAkYAAAAASUVORK5CYII=';
return $string;
}
/**
* sets image original width
*
* @param float $width
*/
protected function setImageWidth($width)
{
$this->_imageWidth = $width;
}
/**
* sets image original height
*
* @param float $height
*/
protected function setImageHeight($height)
{
$this->_imageHeight = $height;
}
/**
* creates rtf image from file
*
* @param PHPRtfLite $rtf
* @param string $file
* @param float $width optional
* @param float $height optional
* @return PHPRtfLite_Image
*/
public static function createFromFile(PHPRtfLite $rtf, $file, $width = null, $height = null)
{
if (file_exists($file) && is_readable($file)) {
$stream = fopen($file, 'rb');
$pathInfo = pathinfo($file);
$type = isset($pathInfo['extension']) ? strtolower($pathInfo['extension']) : 'jpeg';
$image = self::create($rtf, $stream, $type, $width, $height);
if ($type != self::TYPE_WMF) {
list($width, $height, $imageType) = getimagesize($file);
$imageType = image_type_to_extension($imageType, false);
$image->setImageWidth($width);
$image->setImageHeight($height);
if ($type != $imageType) {
$image->setImageType($imageType);
}
}
return $image;
}
return self::createMissingImage($rtf, $width, $height);
}
/**
* creates rtf image from string
*
* @param PHPRtfLite $rtf
* @param string $string
* @param string $type (represented by class constants)
* @param float $width optional
* @param float $height optional
* @return PHPRtfLite_Image
*/
public static function createFromString(PHPRtfLite $rtf, $string, $type, $width = null, $height = null)
{
$stream = fopen('data://text/plain;base64,' . base64_encode($string), 'rb');
$image = self::create($rtf, $stream, $type, $width, $height);
if ($type != self::TYPE_WMF) {
$imageResource = imagecreatefromstring($string);
$image->setImageWidth(imagesx($imageResource));
$image->setImageHeight(imagesy($imageResource));
}
return $image;
}
/**
* factory method
* creates rtf image from stream
*
* @param PHPRtfLite $rtf
* @param resource $stream
* @param string $type (represented by class constants)
* @param float $width optional
* @param float $height optional
* @return PHPRtfLite_Image
*/
private static function create(PHPRtfLite $rtf, $stream, $type, $width, $height)
{
switch ($type) {
case self::TYPE_WMF:
return new PHPRtfLite_Image_Wmf($rtf, $stream, $width, $height);
default:
$image = new PHPRtfLite_Image_Gd($rtf, $stream, $width, $height);
$image->setImageType($type);
return $image;
}
}
/**
* creates a missing image instance
*
* @param PHPRtfLite $rtf
* @param float $width
* @param float $height
* @return PHPRtfLite_Image_Gd
*/
private static function createMissingImage($rtf, $width, $height)
{
$stream = fopen('data://text/plain;base64,' . self::getMissingImage(), 'rb');
$image = new PHPRtfLite_Image_Gd($rtf, $stream, $width, $height);
$image->setImageType(self::TYPE_PNG);
$image->setIsMissing();
return $image;
}
/**
* renders rtf image for rtf document
*/
public function render()
{
$this->writeIntoRtfStream();
}
/**
* writes image into rtf stream
*
* @param integer $startFrom
*/
protected function writeIntoRtfStream($startFrom = 0)
{
fseek($this->_stream, $startFrom);
$rtfImageType = $this->getImageTypeAsRtf();
$rtfStream = $this->_rtf->getWriter();
$rtfStream->write('{\*\shppict {\pict');
if ($this->_border) {
$rtfStream->write($this->_border->getContent());
}
$rtfStream->write($rtfImageType . '\picscalex100\picscaley100');
$rtfStream->write('\picwgoal' . $this->getImageRtfWidth());
$rtfStream->write('\pichgoal' . $this->getImageRtfHeight());
$rtfStream->write(' ');
while (!feof($this->_stream)) {
$stringBuffer = fread($this->_stream, 1024);
$stringHex = bin2hex($stringBuffer);
$rtfStream->write($stringHex);
}
$rtfStream->write('}}');
}
/**
* gets image rtf type
*
* @return string
*/
protected function getImageTypeAsRtf()
{
return $this->_imageRtfType;
}
}