Add-On Memory image support
Informations
Author:OlivierLicense: FPDF
Description
This script allows to display images that are loaded in memory without the need of temporary files. There are two main uses:- When an image is loaded from a database
- When an image is created with GD
For an image loaded into a string:
MemImage(string data [, float x [, float y [, float w [, float h [, mixed link]]]]])For a GD image:
GDImage(resource im [, float x [, float y [, float w [, float h [, mixed link]]]]])where
im is the GD identifier.
Source
<?php
require('fpdf.php');
// Stream handler to read from global variables
class VariableStream
{
public $context;
private $varname;
private $position;
function stream_open($path, $mode, $options, &$opened_path)
{
$url = parse_url($path);
$this->varname = $url['host'];
if(!isset($GLOBALS[$this->varname]))
{
trigger_error('Global variable '.$this->varname.' does not exist', E_USER_WARNING);
return false;
}
$this->position = 0;
return true;
}
function stream_read($count)
{
$ret = substr($GLOBALS[$this->varname], $this->position, $count);
$this->position += strlen($ret);
return $ret;
}
function stream_eof()
{
return $this->position >= strlen($GLOBALS[$this->varname]);
}
function stream_tell()
{
return $this->position;
}
function stream_seek($offset, $whence)
{
if($whence==SEEK_SET)
{
$this->position = $offset;
return true;
}
return false;
}
function stream_stat()
{
return array();
}
}
class PDF_MemImage extends FPDF
{
function __construct($orientation='P', $unit='mm', $size='A4')
{
parent::__construct($orientation, $unit, $size);
// Register var stream protocol
stream_wrapper_register('var', 'VariableStream');
}
function MemImage($data, $x=null, $y=null, $w=0, $h=0, $link='')
{
// Display the image contained in $data
$v = 'img'.md5($data);
$GLOBALS[$v] = $data;
$a = getimagesize('var://'.$v);
if(!$a)
$this->Error('Invalid image data');
$type = substr(strstr($a['mime'], '/'), 1);
$this->Image('var://'.$v, $x, $y, $w, $h, $type, $link);
unset($GLOBALS[$v]);
}
function GDImage($im, $x=null, $y=null, $w=0, $h=0, $link='')
{
// Display the GD image associated with $im
ob_start();
imagepng($im);
$data = ob_get_clean();
$this->MemImage($data, $x, $y, $w, $h, $link);
}
}
?>Example
<?php
require('mem_image.php');
$pdf = new PDF_MemImage();
$pdf->AddPage();
// Load an image into a variable
$logo = file_get_contents('logo.jpg');
// Output it
$pdf->MemImage($logo, 50, 30);
// Create a GD graphics
$im = imagecreate(200, 150);
$bgcolor = imagecolorallocate($im, 255, 255, 255);
$bordercolor = imagecolorallocate($im, 0, 0, 0);
$color1 = imagecolorallocate($im, 255, 0, 0);
$color2 = imagecolorallocate($im, 0, 255, 0);
$color3 = imagecolorallocate($im, 0, 0, 255);
imagefilledrectangle($im, 0, 0, 199, 149, $bgcolor);
imagerectangle($im, 0, 0, 199, 149, $bordercolor);
imagefilledrectangle($im, 30, 100, 60, 148, $color1);
imagefilledrectangle($im, 80, 80, 110, 148, $color2);
imagefilledrectangle($im, 130, 40, 160, 148, $color3);
// Output it
$pdf->GDImage($im, 120, 25, 40);
imagedestroy($im);
$pdf->Output();
?>