Home Backend Development PHP Tutorial Use of ImageMagick for PHP;

Use of ImageMagick for PHP;

Nov 16, 2016 am 10:33 AM
imagemagick php

(1). Create a new picture, 500px wide, 300px high, black, in png format

$img =new Imagick();
$img->newImage(500,300,'black','png')
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Use of ImageMagick for PHP;

(2). Overlay of pictures;

Suppose we select $img in Example 1 as the background , this time we superimpose the second picture on the picture; choose a Spurs GDP combination;

Know that the path of the second picture is assumed to be $imageSrc="/home/XXXX/spurs.png";

Our first step Instantiate this image

$imgtwo = new Imagick($imageSrc);

Because it is to be superimposed, we need to set the size of the two images to be the same; first we need to adjust the size of the first image (ps: here We can also specify the size).

$height=$img->getImageHeight();//获取图片1高度
$width=$img->getImageWidth();//获取图片1宽度
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The second step is to resize the image

$imgtwo->resizeImage($width,$height,Imagick::FILTER_LANCZOS,1);
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resizeImage parameter explanation

bool Imagick::resizeImage ( int $columns , int $rows , int $filter , float $blur [, bool $bestfit = false ] )
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Parameter explanation:

columns width of the image

rows image height

filter filter, used Filter pictures, with Gaussian filter depending on the situation.

blur blur=1 is blur, blur =-1 is sharpening

The third part, superimpose pictures

use compositeImage();

bool Imagick::compositeImage ( Imagick $composite_object , int $composite , int $x , int $y [, int $channel = Imagick::CHANNEL_ALL ] )
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Parameter description:

composite_object: Imagick object for merged pictures

composite: Merge operation, define operation constants. For details, please check the merge operation constant list

x: the abscissa relative to the upper left position (0,0) of the image vertex

y: the ordinate relative to the upper left position (0,0) of the image vertex

channel: by passing in a channel Constant to enable channel mode. To support multiple channels, multiple channel constants can be combined through binary arithmetic operations.

ps: Here we overlay picture two onto picture one

$img->compositeImage($imgtwo,$image->getImageCompose(),0,0)
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The generated picture is as follows:

Use of ImageMagick for PHP;

Finally

1. We can view the picture directly on the web page, but we need to add a header information;

header("Content-Type: image/png");
echo $img;
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2. You can generate pictures in the specified directory;

在当年目录下生成为img.png
$file="./img.png";
$img->writeImage($file);
这样就会在当前目录下生成图片img.png;
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(3). To configure text on pictures

you need to use the ImagickDraw class;

The first step is to instantiate the ImagickDraw class:

$draw=new ImagickDraw();
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Set the font color

$draw->setFillColor(new ImagickPixel('white'));
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Settings Font size

$draw->setFontSize('25');
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Set font

$draw->setFont("../fonts/Arial.ttf");
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Set font direction

$draw->setTextAlignment(Imagick::ALIGN_RIGHT);
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ps:

Imagick::ALIGN_RIGHT Toward the right

Imagick::ALIGN_LEFT Left

Imagick::ALIGN_CENTER Middle

Set font encoding format

$draw->setTextEncoding("utf-8")
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drawing Draw the text

$draw->annotation(200,200,'GDP');
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on the bottom board;

$img->drawImage($draw);
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Use of ImageMagick for PHP;

NBA历史上最伟大的组合GDP

(4).裁剪图片

这个夏天邓肯退役了,GDP组合解题。我们只能把邓肯去掉

$img->cropImage(300, 300, 0, 20);
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第一个参数是图片的宽度

第二个是高度

图片裁剪的x轴位置

图片裁剪Y轴位置

然后我们再把生成一个圆角

$img->roundCorners(60, 60);
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就生成了少了邓肯现在马刺,外加一个伦纳德

ps:这里我重新写了文字,变成了GP;

Use of ImageMagick for PHP;

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