php图像处理 水印 缩略图
php图像处理 水印 缩略图<?php
/**
* image class file
*
* 用于处理图片常用操作,如:生成缩略图,图片水印生成等
* @author tommy <streen003@gmail.com>
* @copyright Copyright (c) 2010 Tommy Software Studio
* @link http://www.doitphp.com
* @license New BSD License.{@link http://www.opensource.org/licenses/bsd-license.php}
* @version $Id: image.class.php 1.3 2010-11-13 21:06:01Z tommy $
* @package libraries
* @since 1.0
*/
class image {
/**
* 原图片路径,该图片在验证码时指背景图片,在水印图片时指水印图片.
*
* @var string
*/
public $imageUrl;
/**
* 字体名称
*
* @var sting
*/
public $fontName;
/**
* 字体大小
*
* @var integer
*/
public $fontSize;
/**
* 图片实例化名称
*
* @var object
*/
protected $image;
/**
* 图象宽度
*
* @var integer
*/
protected $width;
/**
* 图象高度
*
* @var integer
*/
protected $height;
/**
* 图片格式, 如:jpeg, gif, png
*
* @var string
*/
protected $type;
/**
* 文字的横坐标
*
* @var integer
*/
public $fontX;
/**
* 文字的纵坐标
*
* @var integer
*/
public $fontY;
/**
* 字体颜色
*
* @var string
*/
protected $fontColor;
/**
* 生成水印图片的原始图片的宽度
*
* @var integer
*/
protected $imageWidth;
/**
* 生成水印图片的原始图片的高度
*
* @var integer
*/
protected $imageHeight;
/**
* 生成缩略图的实际宽度
*
* @var integer
*/
protected $widthNew;
/**
* 生成缩略图的实际高度
*
* @var integer
*/
protected $heightNew;
/**
* 水印图片的实例化对象
*
* @var object
*/
protected $waterImage;
/**
* 生成水印区域的横坐标
*
* @var integer
*/
protected $waterX;
/**
* 生成水印区域的纵坐标
*
* @var integer
*/
protected $waterY;
/**
* 生成水印图片的水印区域的透明度
*
* @var integer
*/
protected $alpha;
/**
* 文字水印字符内容
*
* @var string
*/
protected $textContent;
/**
* 水印图片的宽度
*
* @var integer
*/
protected $waterWidth;
/**
* 水印图片的高度
*
* @var integer
*/
protected $waterHeight;
/**
* 构造函数
*
* @access public
* @return boolean
*/
public function __construct() {
$this->fontSize = 14;
$this->fontName = 'aispec.ttf';
return true;
}
/**
* 初始化运行环境,获取图片格式并实例化.
*
* @param string $url 图片路径
* @return boolean
*/
protected function parseImageInfo($url) {
list($this->imageWidth, $this->imageHeight, $type) = getimagesize($url);
switch ($type) {
case 1:
$this->image = imagecreatefromgif ($url);
$this->type = 'gif';
break;
case 2:
$this->image = imagecreatefromjpeg($url);
$this->type = 'jpg';
break;
case 3:
$this->image = imagecreatefrompng($url);
$this->type = 'png';
break;
case 4:
$this->image = imagecreatefromwbmp($url);
$this->type = 'bmp';
break;
}
return true;
}
/**
* 设置字体名称.
*
* @param sting $name 字体名称(字体的路径)
* @param integer $size 字体大小
*/
public function setFontName($name, $size = null) {
if (!empty($name)) {
$this->fontName = $name;
}
if (!is_null($size)) {
$this->fontSize = (int)$size;
}
return $this;
}
/**
* 设置字体大小.
*
* @param integer $size 字体大小
* @return $this
*/
public function setFontSize($size) {
if (!empty($size)) {
$this->fontSize = intval($size);
}
return $this;
}
/**
* 获取颜色参数.
*
* @param integer $x RGB色彩中的R的数值
* @param integer $y RGB色彩中的G的数值
* @param integer $z RGB色彩中的B的数值
* @return $this
*/
public function setFontColor($x=false, $y=false, $z=false) {
$this->fontColor = (is_int($x) && is_int($y) && is_int($z)) ? array($x, $y, $z) : array(255, 255, 255);
return $this;
}
/**
* 水印图片的URL.
*
* @param string $url 图片的路径(图片的实际地址)
* @return $this
*/
public function setImageUrl($url) {
if (!empty($url)) {
$this->imageUrl = $url;
}
return $this;
}
/**
* 设置生成图片的大小.
*
* @param integer $width 图片的宽度
* @param integer $height 图片的高度
* @return $this
*/
public function setImageSize($width, $height) {
if (!empty($width)) {
$this->width = (int)$width;
}
if (!empty($height)) {
$this->height = (int)$height;
}
return $this;
}
/**
* 设置文字水印字符串内容.
*
* @param string $content
* @return $this
*/
public function setTextContent($content) {
if (!empty($content)) {
$this->textContent = $content;
}
return $this;
}
/**
* 设置文字水印图片文字的坐标位置.
*
* @param integer $x 水印区域的横坐标
* @param integer $y 水印区域的纵坐标
* @return $this
*/
public function setTextPosition($x, $y) {
if (!empty($x)) {
$this->fontX = (int)$x;
}
if (!empty($y)) {
$this->fontY = (int)$y;
}
return $this;
}
/**
* 设置水印图片水印的坐标位置.
*
* @param integer $x 水印区域的横坐标
* @param integer $y 水印区域的纵坐标
* @return $this
*/
public function setWatermarkPosition($x, $y) {
if (!empty($x)) {
$this->waterX = (int)$x;
}
if (!empty($y)) {
$this->waterY = (int)$y;
}
return $this;
}
/**
* 设置水印图片水印区域的透明度.
*
* @param integer $param 水印区域的透明度
* @return $this
*/
public function setWatermarkAlpha($param) {
if (!empty($param)) {
$this->alpha = intval($param);
}
return $this;
}
/**
* 调整文字水印区域的位置
*
* @return boolean
*/
protected function handleWatermarkFontPlace($limitOption = false) {
if (!$this->fontX || !$this->fontY) {
/* //写入日志注释
if (!$this->textContent) {
Controller::halt('You do not set the watermark text on image!');
} */
$bbox = imagettfbbox($this->fontSize, 0, $this->fontName, $this->textContent);
//文字margin_right为5px,特此加5
$fontW = $bbox - $bbox + 5;
$fontH = abs($bbox - $bbox);
if ($limitOption === true && $this->heightNew && $this->heightNew) {
$this->fontX = ($this->widthNew > $fontW) ? $this->widthNew - $fontW : 0;
$this->fontY = ($this->heightNew > $fontH) ? $this->heightNew - $fontH : 0;
} else {
$this->fontX = ($this->imageWidth > $fontW) ? $this->imageWidth - $fontW : 0;
$this->fontY = ($this->imageHeight > $fontH) ? $this->imageHeight - $fontH : 0;
}
}
return true;
}
/**
* 常设置的文字颜色转换为图片信息.
*
* @return boolean
*/
protected function handleFontColor() {
if (empty($this->fontColor)) {
$this->fontColor = array(255, 255, 255);
}
return imagecolorallocate($this->image, $this->fontColor, $this->fontColor, $this->fontColor);
}
/**
* 根据图片原来的宽和高的比例,自适应性处理缩略图的宽度和高度
*
* @return boolean
*/
protected function handleImageSize() {
//当没有所生成的图片的宽度和高度设置时.
/* //写入日志注释
if (!$this->width || !$this->height) {
Controller::halt('You do not set the image height size or width size!');
} */
$perW = $this->width/$this->imageWidth;
$perH = $this->height/$this->imageHeight;
if (ceil($this->imageHeight*$perW)>$this->height) {
$this->widthNew = ceil($this->imageWidth*$perH);
$this->heightNew = $this->height;
} else {
$this->widthNew = $this->width;
$this->heightNew = ceil($this->imageHeight*$perW);
}
return true;
}
/**
* 生成图片的缩略图.
*
* @param string $url 原始图片路径
* @param string $distName 生成图片的路径(注:无须后缀名)
* @return boolean
*/
public function makeLimitImage($url, $distName = null) {
//参数分析
if (!$url) {
return false;
}
//原图片分析.
$this->parseImageInfo($url);
$this->handleImageSize();
//新图片分析.
$imageDist = imagecreatetruecolor($this->widthNew, $this->heightNew);
//生成新图片.
imagecopyresampled($imageDist, $this->image, 0, 0, 0, 0, $this->widthNew, $this->heightNew, $this->imageWidth, $this->imageHeight);
$this->createImage($imageDist, $distName, $this->type);
imagedestroy($imageDist);
imagedestroy($this->image);
echo '生成缩略图成功！<br />';
return true;
}
/**
* 生成目标图片.
*
* @param string $imageDist 原始图片的路径
* @param string $distName 生成图片的路径
* @param string $imageType 图片格式
*/
protected function createImage($imageDist, $distName = null, $imageType) {
//参数分析
if (!$imageDist || !$imageType) {
return false;
}
if (!is_null($distName)) {
switch ($imageType) {
case 'gif':
imagegif ($imageDist, $distName.'.gif');
break;
case 'jpg':
imagejpeg($imageDist, $distName.'.jpg');
break;
case 'png':
imagepng($imageDist, $distName.'.png');
break;
case 'bmp':
imagewbmp($imageDist, $distName.'.bmp');
break;
}
} else {
switch ($imageType) {
case 'gif':
header('Content-type:image/gif');
imagegif ($imageDist);
break;
case 'jpg':
header('Content-type:image/jpeg');
imagejpeg($imageDist);
break;
case 'png':
header('Content-type:image/png');
imagepng($imageDist);
break;
case 'bmp':
header('Content-type:image/png');
imagewbmp($imageDist);
break;
}
}
return true;
}
/**
* 生成文字水印图片.
*
* @param stirng $imageUrl 背景图片的路径
* @param string $distName 路径目标图片的
* @return boolean
*/
public function makeTextWatermark($imageUrl, $distName = null) {
//参数判断
if (!$imageUrl) {
return false;
}
//分析原图片.
$this->parseImageInfo($imageUrl);
//当所要生成的文字水印图片有大小尺寸限制时(缩略图功能)
if($this->width && $this->height) {
$this->handleImageSize();
//新图片分析.
$imageDist = imagecreatetruecolor($this->widthNew, $this->heightNew);
//生成新图片.
imagecopyresampled($imageDist, $this->image, 0, 0, 0, 0, $this->widthNew, $this->heightNew, $this->imageWidth, $this->imageHeight);
//所生成的图片进行分析.
$this->handleWatermarkFontPlace(true);
$fontColor = $this->handleFontColor();
//生成新图片.
imagettftext($imageDist, $this->fontSize, 0, $this->fontX, $this->fontY, $fontColor, $this->fontName, $this->textContent);
$this->createImage($imageDist, $distName, $this->type);
imagedestroy($imageDist);
} else {
//所生成的图片进行分析.
$this->handleWatermarkFontPlace();
$fontColor = $this->handleFontColor();
//生成新图片.
imagettftext($this->image, $this->fontSize, 0, $this->fontX, $this->fontY, $fontColor, $this->fontName, $this->textContent);
$this->createImage($this->image, $distName, $this->type);
}
imagedestroy($this->image);
echo '生成文字水印成功！<br />';
return true;
}
/**
* 获取水印图片信息
*
* @return boolean
*/
protected function handleWatermarkImage() {
if ($this->image && !$this->waterImage) {
$waterUrl = (!$this->imageUrl) ? './2.gif' : $this->imageUrl;
list($this->waterWidth, $this->waterHeight, $type) = getimagesize($waterUrl);
switch ($type) {
case 1:
$this->waterImage = imagecreatefromgif ($waterUrl);
break;
case 2:
$this->waterImage = imagecreatefromjpeg($waterUrl);
break;
case 3:
$this->waterImage = imagecreatefrompng($waterUrl);
break;
case 4:
$this->waterImage = imagecreatefromwbmp($waterUrl);
break;
}
}
return true;
}
/**
* 调整水印区域的位置,默认位置距图片右下角边沿5像素.
*
* @return boolean
*/
protected function handleWatermarkImagePlace($limitOption = false) {
if (!$this->waterX || !$this->waterY) {
if ($limitOption === true && $this->widthNew && $this->heightNew) {
$this->waterX = ($this->widthNew - 5 > $this->waterWidth) ? $this->widthNew - $this->waterWidth - 5 : 0;
$this->waterY = ($this->heightNew - 5 > $this->waterHeight) ? $this->heightNew - $this->waterHeight - 5 : 0;
} else {
$this->waterX = ($this->imageWidth-5 > $this->waterWidth) ? $this->imageWidth - $this->waterWidth - 5 : 0;
$this->waterY = ($this->imageHeight-5 > $this->waterHeight) ? $this->imageHeight - $this->waterHeight - 5 : 0;
}
}
return true;
}
/**
* 生成图片水印.
*
* @param string $imageUrl 原始图片的路径
* @param string $distName 生成图片的路径(注:不含图片后缀名)
* @return boolean
*/
public function makeImageWatermark($imageUrl, $distName = null) {
//参数分析
if (!$imageUrl) {
return false;
}
//分析图片信息.
$this->parseImageInfo($imageUrl);
//水印图片的透明度参数
$this->alpha = empty($this->alpha) ? 85 : $this->alpha;
//对水印图片进行信息分析.
$this->handleWatermarkImage();
if ($this->width && $this->height) {
$this->handleImageSize();
//新图片分析.
$imageDist = imagecreatetruecolor($this->widthNew, $this->heightNew);
//生成新图片.
imagecopyresampled($imageDist, $this->image, 0, 0, 0, 0, $this->widthNew, $this->heightNew, $this->imageWidth, $this->imageHeight);
//分析新图片的水印位置.
$this->handleWatermarkImagePlace(true);
//生成新图片.
imagecopymerge($imageDist, $this->waterImage, $this->waterX, $this->waterY, 0, 0, $this->waterWidth, $this->waterHeight, $this->alpha);
$this->createImage($imageDist, $distName, $this->type);
imagedestroy($imageDist);
} else {
//分析新图片的水印位置.
$this->handleWatermarkImagePlace();
//生成新图片.
imagecopymerge($this->image, $this->waterImage, $this->waterX, $this->waterY, 0, 0, $this->waterWidth, $this->waterHeight, $this->alpha);
$this->createImage($this->image, $distName, $this->type);
}
imagedestroy($this->image);
imagedestroy($this->waterImage);
echo '生成图片水印成功！<br />';
return true;
}
}
$image = new image();
//生成图片水印
$image->setWatermarkPosition(450,20);//调整水印图片的位置
$image->setImageUrl("./3.gif");//水印图片路径 如果不设置有默认水印图片
$image->setWatermarkAlpha(80);//设置水印图片的透明度
$image->makeImageWatermark("./1.png","./test1");
//aispec.ttf为字体文件
//生成文字水印
$image->setFontName('./aispec.ttf');
$image->setTextContent('Hello');//水印文字
$image->setTextPosition(200,200);//调整水印文字的位置
$image->setFontSize(50);//设置字体大小
$image->makeTextWatermark("./1.png","./test2");
//生成缩略图
$image->setImageSize(300,400);//生成图片的大小
$image->makeLimitImage("./1.png","./test3");
?>
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