Create thumbnails and copyright classes for pictures

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Create thumbnails and copyright classes for pictures

Recently a few days to look at the image processing of PHP features, the previous demand in this area is relatively small, there is no way to see, recently have a look. Feel the picture processing some simple function also can, complex even, GD storehouse all 2.0.1, still do not support Chinese, read a few articles, want to use Chinese only first convert GB2312 to Unicode again write picture, too troublesome, simply use English to forget.

In the Image generation section, you can define the maximum height and width of the picture, which is suitable for news and photo albums and other systems.

GD2.0.1 in the image processing has been greatly improved, I tried the next imagecopyresized and Imagecopyresampled, the latter deal with the picture is significantly better than the former, according to the manual that the latter to change the size of the picture after the basic remains not distorted, the effect of generating thumbnails is really good.

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Below is the class
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//====================================================
FileName:GDImage.inc.php
Summary: Picture processing program
Author:ice_berg16 (Scarecrow seeking the Dream)
Createtime:2004-10-12
Lastmodifed:2004-10-12
Copyright (c) ice_berg16@163.com
//====================================================

Class Gdimage
{
var $sourcePath; Picture Storage Path
var $galleryPath; Picture Thumbnails storage Path
var $toFile = false; Whether to generate files
var $fontName; TTF font name to use
var $maxWidth = 500; Picture Maximum width
var $maxHeight = 600; Picture Max height

//==========================================
Functions: Gdimage ($sourcePath, $galleryPath, $fontPath)
Function: Constructor
Parameters: $sourcePath Picture source path (including last "/")
Parameters: $galleryPath The path to build a picture
Parameters: $fontPath Font path
//==========================================
function Gdimage ($sourcePath, $galleryPath, $fontPath)
{
$this->sourcepath = $sourcePath;
$this->gallerypath = $galleryPath;
$this->fontname = $fontPath. "04b_08__. TTF ";
}

//==========================================
Functions: Makethumb ($sourFile, $width =128, $height =128)
function: Generate thumbnails (output to browser)
Parameters: $sourFile Picture source file
Parameters: $width to generate the width of the thumbnail
Parameters: The height of the thumbnail $height generated
Return: 0 Returns the generated picture path when failure succeeds
//==========================================
function Makethumb ($sourFile, $width =128, $height =128)
{
$imageInfo = $this->getinfo ($sourFile);
$sourFile = $this->sourcepath. $sourFile;
$newName = substr ($imageInfo ["name"], 0, Strrpos ($imageInfo ["name"], "."). "_thumb.jpg";
Switch ($imageInfo ["type"])
{
Case 1://gif
$img = Imagecreatefromgif ($sourFile);
Break
Case 2://jpg
$img = Imagecreatefromjpeg ($sourFile);
Break
Case 3://png
$img = Imagecreatefrompng ($sourFile);
Break
Default
return 0;
Break
}
if (! $img)
return 0;

$width = ($width > $imageInfo ["width"])? $imageInfo ["width"]: $width;
$height = ($height > $imageInfo ["height"])? $imageInfo ["Height"]: $height;
$srcW = $imageInfo ["width"];
$srcH = $imageInfo ["Height"];
if ($srcW * $width > $srcH * $height)
$height = Round ($srcH * $width/$srcW);
Else
$width = Round ($srcW * $height/$srcH);
//*
if (function_exists ("Imagecreatetruecolor"))//gd2.0.1
{
$new = Imagecreatetruecolor ($width, $height);
Imagecopyresampled ($new, $img, 0, 0, 0, 0, $width, $height, $imageInfo ["width"], $imageInfo ["height"]);
}
Else
{
$new = Imagecreate ($width, $height);
Imagecopyresized ($new, $img, 0, 0, 0, 0, $width, $height, $imageInfo ["width"], $imageInfo ["height"]);
}
//*/
if ($this->tofile)
{
if (file_exists ($this->gallerypath. $newName))
Unlink ($this->gallerypath. $newName);
Imagejpeg ($new, $this->gallerypath. $newName);
Return $this->gallerypath. $newName;
}
Else
{
Imagejpeg ($new);
}
Imagedestroy ($new);
Imagedestroy ($IMG);

}
//==========================================
Functions: Watermark ($sourFile, $text)
Function: Add watermark to Picture
Parameters: $sourFile picture file name
Parameters: An array of $text literals (two strings included)
Return: 1 Returns the generated picture path when successful
//==========================================
function watermark ($sourFile, $text)
{
$imageInfo = $this->getinfo ($sourFile);
$sourFile = $this->sourcepath. $sourFile;
$newName = substr ($imageInfo ["name"], 0, Strrpos ($imageInfo ["name"], "."). "_mark.jpg";
Switch ($imageInfo ["type"])
{
Case 1://gif
$img = Imagecreatefromgif ($sourFile);
Break
Case 2://jpg
$img = Imagecreatefromjpeg ($sourFile);
Break
Case 3://png
$img = Imagecreatefrompng ($sourFile);
Break
Default
return 0;
Break
}
if (! $img)
return 0;

$width = ($this->maxwidth > $imageInfo ["width"])? $imageInfo ["width"]: $this->maxwidth;
$height = ($this->maxheight > $imageInfo ["height"])? $imageInfo ["Height"]: $this->maxheight;
$srcW = $imageInfo ["width"];
$srcH = $imageInfo ["Height"];
if ($srcW * $width > $srcH * $height)
$height = Round ($srcH * $width/$srcW);
Else
$width = Round ($srcW * $height/$srcH);
//*
if (function_exists ("Imagecreatetruecolor"))//gd2.0.1
{
$new = Imagecreatetruecolor ($width, $height);
Imagecopyresampled ($new, $img, 0, 0, 0, 0, $width, $height, $imageInfo ["width"], $imageInfo ["height"]);
}
Else
{
$new = Imagecreate ($width, $height);
Imagecopyresized ($new, $img, 0, 0, 0, 0, $width, $height, $imageInfo ["width"], $imageInfo ["height"]);
}
$white = Imagecolorallocate ($new, 255, 255, 255);
$black = imagecolorallocate ($new, 0, 0, 0);
$alpha = Imagecolorallocatealpha ($new, 230, 230, 230, 40);
$rectW = Max (strlen ($text [0]), strlen ($text [1])) *7;
Imagefilledrectangle ($new, 0, $height -26, $width, $height, $alpha);
Imagefilledrectangle ($new, $height -20, $height-7, $black);
Imagettftext ($new, 4.9, 0, $height -14, $black, $this->fontname, $text [0]);
Imagettftext ($new, 4.9, 0, $height-6, $black, $this->fontname, $text [1]);
//*/
if ($this->tofile)
{
if (file_exists ($this->gallerypath. $newName))
Unlink ($this->gallerypath. $newName);
Imagejpeg ($new, $this->gallerypath. $newName);
Return $this->gallerypath. $newName;
}
Else
{
Imagejpeg ($new);
}
Imagedestroy ($new);
Imagedestroy ($IMG);

}
//==========================================
Functions: Displaythumb ($file)
Function: Display thumbnail of the specified picture
Parameters: $file file name
Back: 0 picture does not exist
//==========================================
function Displaythumb ($file)
{
$thumbName = substr ($file, 0, Strrpos ($file, ".")). "_thumb.jpg";
$file = $this->gallerypath. $thumbName;
if (!file_exists ($file))
return 0;
$html = "";
Echo $html;
}
//==========================================
Functions: Displaymark ($file)
Function: Display the watermark of the specified picture
Parameters: $file file name
Back: 0 picture does not exist
//==========================================
function Displaymark ($file)
{
$markName = substr ($file, 0, Strrpos ($file, ".")). "_mark.jpg";
$file = $this->gallerypath. $markName;
if (!file_exists ($file))
return 0;
$html = "";
Echo $html;
}
//==========================================
Functions: GetInfo ($file)
Function: Return image information
Parameters: $file File path
Back: array of picture information
//==========================================
function GetInfo ($file)
{
$file = $this->sourcepath. $file;
$data = getimagesize ($file);
$imageInfo ["width"] = $data [0];
$imageInfo ["Height"]= $data [1];
$imageInfo ["type"] = $data [2];
$imageInfo ["name"] = basename ($file);
return $imageInfo;
}

}

?>
----------------------------------
Here's how to use
This class uses a 04b_08__. TTF fonts
Specify the font path when using the class
-----------------------------------
Require_once ("GDImage.inc.php");

Header ("Content-type:image/jpeg");//output to browser don't forget to open this.
$img = new Gdimage (Ib_upload_path, Ib_gallery, ib_temp);
$text = Array ("ice-berg.org", "All Rights reserved");
$img->maxwidth = $img->maxheight = 300;
$img->tofile = true;
$img->watermark ("Mm.jpg", $text);
$img->makethumb ("mm.jpg");
$img->displaythumb ("mm.jpg");
$img->displaymark ("mm.jpg");