PHP IMAGEMAGICK MAGICKWAND 使用

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在php中，虽然使用GD库可以进行比较强大的图形处理。但是使用 ImageMagick的PHP扩展MagickWand同样能够实现强大的处理功能。当然，使用MagickWand需要在php中增加一个extension。具体怎么添加大家google吧。

这边转载几个使用MagickWand的例子。

来源：http://www.ioncannon.net/php/61/php-imagemagick-magickwand-examples/

Example 1: Simple Annotate

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<?php
// convert flower.jpg -font courier -fill white -pointsize 20 -annotate +50+50 Flower flower_annotate1.jpg
$resource = NewMagickWand();
$dwand = NewDrawingWand();
$pwand = NewPixelWand();
PixelSetColor($pwand, "white");
DrawSetFont($dwand, "/usr/share/fonts/default/TrueType/cour.ttf");
DrawSetFontSize($dwand, 20);
DrawSetFillColor($dwand, $pwand);
MagickReadImage( $resource, 'small_flower.jpg' );
if( MagickAnnotateImage( $resource, $dwand, 0, 0, 0, "Flower" ) )
{
header( 'Content-Type: image/gif' );
MagickEchoImageBlob( $resource );
}
else
{
echo MagickGetExceptionString($resource);
}
?>

One note on the above is that I needed to specify the exact location of the font to get it to show up. I believe this isn't always needed but if you try to leave it out and nothing shows up you should try specifying the full path to the font.

Example 2: Complex Annotate

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<?php
// convert flower.jpg -fill white -box "#00770080" -gravity South -pointsize 20 -annotate +0+5 " Flower " flower_annotate2.jpg
$resource = NewMagickWand();
$dwand = NewDrawingWand();
$pwand = NewPixelWand();
PixelSetColor($pwand, "white");
DrawSetFont($dwand, "/usr/share/fonts/default/TrueType/cour.ttf");
DrawSetFontSize($dwand, 20);
DrawSetFillColor($dwand, $pwand);
DrawSetGravity($dwand, MW_SouthGravity);
MagickReadImage( $resource, 'small_flower.jpg' );
if( MagickAnnotateImage( $resource, $dwand, 0, 0, 0, "Flower" ) )
{
header( 'Content-Type: image/gif' );
MagickEchoImageBlob( $resource );
}
else
{
echo MagickGetExceptionString($resource);
}
?>

Example 3: Crop an Area

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<?php
// convert flower.jpg -crop 128×128+50+50 flower_crop.jpg
$resource = NewMagickWand();
MagickReadImage( $resource, 'small_flower.jpg' );
if( MagickCropImage( $resource, 128, 128, 50, 50 ) )
{
header( 'Content-Type: image/gif' );
MagickEchoImageBlob( $resource );
}
else
{
echo MagickGetExceptionString($resource);
}
?>

Example 4: Rotate

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<?php
// convert flower.jpg -rotate 45 flower_rotate45.jpg
$resource = NewMagickWand();
MagickReadImage( $resource, 'small_flower.jpg' );
MagickRotateImage( $resource, null, 45 );
header( 'Content-Type: image/gif' );
MagickEchoImageBlob( $resource );
?>

Example 5: Resize

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<?php
// convert flower_original.jpg -resize 640×480 flower.jpg
$resource = NewMagickWand();
MagickReadImage( $resource, 'small_flower.jpg' );
MagickResizeImage( $resource, 100, 100, MW_QuadraticFilter, 1.0 );
header( 'Content-Type: image/gif' );
MagickEchoImageBlob( $resource );
?>

Example 6: Apply Resharp Filter

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<?php
// convert flower.jpg -unsharp 1.5×1.0+1.5+0.02 flower_unsharp.jpg
$resource = NewMagickWand();
MagickReadImage( $resource, 'small_flower.jpg' );
MagickUnsharpMaskImage( $resource, 1.5, 1.0, 1.5, 0.02 );
header( 'Content-Type: image/gif' );
MagickEchoImageBlob( $resource );
?>

Example 7: Compress JPG

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<?php
// convert flower.jpg -quality 80% flower_quality.jpg
$resource = NewMagickWand();
MagickReadImage( $resource, 'small_flower.jpg' );
MagickSetFormat($resource, 'JPG');
MagickSetImageCompression($resource, MW_JPEGCompression);
MagickSetImageCompressionQuality($resource, 80.0);
header( 'Content-Type: image/gif' );
MagickEchoImageBlob( $resource );
?>

下面是一个图片处理类。可以处理动态的多帧的gif图片。

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<?php
/**
* 定义 Myclass_Magick
*
* MagicWand_Info :
* ---------------------------
* ImageMagick 官网地址 [url]http:www.imagemagick.org/script/index.php[/url]
* MagickWand For PHP Manual　[url]http:www.magickwand.org/[/url]
* MagickWand For PHP模块下载地址 [url]http:www.magickwand.org/download/php/[/url]
*/
class Myclass_Magick
{
function Myclass_Magick() {
if( !function_exists('newmagickwand') ) {
die('no MagickImage extends! ');
}
}
/**
* 生成动态GIF
*
* @param array $fileName: 目标文件地址
* @param int $delay: GIF帧过渡时间
* @param string $desName: 生成后的图像文件名
*
*/
function createGif($fileName, $delay=1, $desName='') {
$desName = $this->getDesName($desName);
$mw = NewMagickWand();
for($i=0; $i<count ($fileName);$i++){
$mwTemp=NewMagickWand();
MagickReadImage($mwTemp,$fileName[$i]);
MagickSetImageDelay($mwTemp,$delay*100); //100="1秒"
MagickAddImage($mw,$mwTemp);
DestroyMagickWand($mwTemp);
}
MagickSetFormat($mw,"gif");
MagickWriteImages($mw,$desName,MagickTrue);
$mw=DestroyMagickWand($mw);
return $desName;
}
/**
* 缩放动态GIF
* @param string $fileName: 目标文件地址
* @param int $width: 生成后的图像宽度
* @param int $height: 生成后的图像高度
* @param string $desName: 生成后的图像名称
*
*/
function resizeGif($fileName, $width, $height, $desName ) { $desName="$this-">getDesName($desName);
$mw = NewMagickWand();
MagickReadImage($mw,$fileName);
MagickResetIterator($mw);
//MagickNextImage($mw);
do {
$iw = MagickGetImageWidth($mw);
$ih = MagickGetImageHeight($mw);
$ratio = doubleval($iw) / doubleval($width);
if ($height * $ratio < $ih) {
$ratio = doubleval($ih) / doubleval($height);
}
$arrSize = array( floor($iw/$ratio), floor($ih/$ratio));
MagickResizeImage($mw, $arrSize[0], $arrSize[1], 1, 1);
} while(MagickNextImage($mw));
MagickSetFormat($mw,"gif");
MagickWriteImages($mw, $desName, true);
DestroyMagickWand($mw);
return $desName;
}
/**
* 向动画GIF上写字
*
* @param string $fileName: 目标文件地址
* @param string $text: 要写的文字
* @param string $desName: 生成后的图像地址
* @param array $height: 文字的样式
*
*/
function writeGif($fileName, $text, $desName='', $config='') {
$desName = $this->getDesName($desName);
$textAlign = array( // 对齐方式
0 => MW_ForgetGravity,
1 => MW_NorthWestGravity,
2 => MW_NorthGravity,
3 => MW_NorthEastGravity,
4 => MW_WestGravity,
5 => MW_CenterGravity,
6 => MW_EastGravity,
7 => MW_SouthWestGravity,
8 => MW_SouthGravity,
9 => MW_SouthEastGravity,
10 => MW_StaticGravity,
);
$textColor = "#FF0000"; // 字体颜色
$textWidth = 120; // 字体宽度
$textSize = 14; // 字体大小
$textFont = "simhei.ttf";
$textAlpha = 1;
$textAlignIndex = 1;
$textString = iconv("gb2312", "utf-8", $text);//如果你传入的是非UTF8中文，这里要转换
$textName = $this->desName;
if($config) {
extract($config, EXTR_OVERWRITE);
}
$dwFont = NewDrawingWand();
$fontColor = NewPixelWand($textColor);
DrawSetTextEncoding($dwFont, "UTF-8"); //设定图像上文字的编码
DrawSetFont($dwFont, $textFont); //设定字体
DrawSetFontWeight($dwFont, $textWidth); //设定字宽
DrawSetFillColor($dwFont, $fontColor); //设定颜色
DrawSetFontSize($dwFont, $textSize); //设定字体大小
DrawSetGravity($dwFont, $textAlignIndex); //设定对齐方式
DrawSetFillAlpha($dwFont, $textAlpha); //设置不透明度，1为完全不透明
$dwGif = NewMagickWand();
MagickReadImage($dwGif, $fileName);
MagickResetIterator($dwGif);
do {
MagickAnnotateImage( $dwGif, $dwFont, 1, 1, 0, $textString );
} while(MagickNextImage($dwGif));
MagickSetFormat($dwGif,"gif");
MagickWriteImages($dwGif, $desName, true);
DestroyDrawingWand($dwFont);
DestroyMagickWand($dwGif);
return $desName;
}
/**
* 向图像上写文字
*
* @param array $fileName: 目标文件地址
* @param string $desName: 生成后的图像地址
* @param array $fontInfo1:文字的样式信息
* @param array $fontInfo2:文字的样式信息
* @param int $delay: GIF帧过渡时间
*
*/
function writeText2($fileName, $desName='', $fontInfo1='', $fontInfo2='', $delay=1) {
$desName = './temp/' . $this->getDesName($desName);
$f1 = $this->writeText($fileName, $fontInfo1);
$f2 = $this->writeText($fileName, $fontInfo2);
//　再生成GIF
$mwGif = NewMagickWand();
$mw1 = NewMagickWand();
$mw2 = NewMagickWand();
MagickReadImage($mw1, $f1);
MagickReadImage($mw2, $f2);
MagickSetImageDelay($mw1,$delay*100);
MagickAddImage($mwGif, $mw1);
MagickSetImageDelay($mw2,$delay*100);
MagickAddImage($mwGif, $mw2);
DestroyMagickWand($mw1);
DestroyMagickWand($mw2);
MagickSetFormat($mwGif, "gif");
MagickWriteImages($mwGif, $desName, MagickTrue);
DestroyMagickWand($mwGif);
unlink($f1);
unlink($f2);
return $desName;
}
/**
* 向单帧图像写字，为writeText服务
*
* @param string $fileName: 目标文件地址
* @param array $config: 配置信息
*
*/
function writeText($fileName, $config='') {
$textAlign = array( // 对齐方式
0 => MW_ForgetGravity,
1 => MW_NorthWestGravity,
2 => MW_NorthGravity,
3 => MW_NorthEastGravity,
4 => MW_WestGravity,
5 => MW_CenterGravity,
6 => MW_EastGravity,
7 => MW_SouthWestGravity,
8 => MW_SouthGravity,
9 => MW_SouthEastGravity,
10 => MW_StaticGravity,
);
$textColor = "#FF0000"; // 字体颜色
$textWidth = 120; // 字体宽度
$textSize = 14; // 字体大小
$textFont = "simhei.ttf";
$textAlpha = 1;
$textAlignIndex = 1;
$textString = "测试"; //如果你传入的是非UTF8中文，这里要转换
$textString = iconv("gb2312", "utf-8", $textString);//如果你传入的是非UTF8中文，这里要转换
$textStrokeColor = "#00FF00";
$textStrokeWidth = 0;
$textStrokeOpacity = 0.2;
$textX = 0;
$textY = 0;
if($config) {
extract($config, EXTR_OVERWRITE);
}
$dwFont = NewDrawingWand();
$fontColor = NewPixelWand($textColor);
DrawSetTextEncoding($dwFont, "UTF-8"); //设定图像上文字的编码
DrawSetFont($dwFont, $textFont); //设定字体
DrawSetFontWeight($dwFont, $textWidth); //设定字宽
DrawSetFillColor($dwFont, $fontColor); //设定颜色
DrawSetFontSize($dwFont, $textSize); //设定字体大小
DrawSetGravity($dwFont, $textAlignIndex); //设定对齐方式
DrawSetFillAlpha($dwFont, $textAlpha); //设置不透明度，1为完全不透明
$strokeColor = NewPixelWand($textStrokeColor);//设定外边框的颜色
DrawSetStrokeColor($dwFont, $strokeColor); //设定外边框的颜色
DrawSetStrokeWidth($dwFont, $textStrokeWidth); //设定外边框的宽度
DrawSetStrokeOpacity($dwFont, $textStrokeOpacity); //设定外边框的不透明度
$mw = NewMagickWand();
MagickReadImage($mw, $fileName);
MagickAnnotateImage($mw, $dwFont, $textX, $textY, 0, $textString );
$tempName = './temp/' . time() . rand(0,1000) . ".jpg";
MagickSetFormat($mw, "jpg");
MagickWriteImage($mw, $tempName);
DestroyDrawingWand($dwFont);
DestroyMagickWand($mw);
return $tempName;
}
function getDesName($desName) {
if( emptyempty($desName) ) {
$desName = md5(time().rand(0,100)).'.gif';
}
else {
if( stripos(strtolower($desName), '.gif') === false ) {
$desName .= ".gif";
}
}
return $desName;
}
}
?>