Use ImageMagick of PHP;

I have previously written a project that requires the PHP Imagick class for image operations. I personally feel that there are many Imagick documents, but they are messy. I will explain the simple use of Imagick through an example;

(1) create a new image with a width of PX, a height of PX, and a black image in png format.

$img =new Imagick();$img->newImage(500,300,'black','png')

(2) overlapping images;

Suppose we select $ img in example 1 as the background. in this case, we overlay the second image to the image and select a Spurs gdp combination;

The path of image 2 is assumed to be $ imageSrc = "/home/XXXX/spurs.png ";

Step 1: instantiate this image

$ Imgtwo = new Imagick ($ imageSrc );

To overlay the image, we need to set the same size for the two images. First, we need to specify the size of the first image (ps: Here we can also specify the size ).

$ Height = $ img-> getImageHeight (); // Get image 1 height $ width = $ img-> getImageWidth (); // Get image 1 width

Step 2: resize the image

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

ResizeImage parameter description

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

Parameter description:

Columns image width

Rows Image height

Filter, used to filter images, with Gaussian filte based on the situation

Blur = 1 is virtual, and blur =-1 is sharpening

Part 3: overlay images

Use compositeImage ();

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

Parameter description:

Composite_object: Imagick object used for merged images

Composite: combines operations and defines operation constants. For details, see the merging operation constant list.

X: The abscissa relative to the top left of the image vertex (0, 0)

Y: the vertical coordinate relative to the top left of the image vertex (0, 0)

Channel: you can input a channel constant to enable the channel mode. To support multiple channels, you can merge multiple channel constants through binary operations.

Ps: Here we will overwrite Image 2 to image 1.

$img->compositeImage($imgtwo,$image->getImageCompose(),0,0)

The generated image is as follows:

Last

1. you can view images directly on the webpage, but add a header;

header("Content-Type: image/png");echo $img;

2. images can be generated in a specified directory;

Img.png $ file = "./img.png" is generated under the current directory; $ img-> writeimage(?file==}this will generate the image img.png in the current directory;

(3) configure text on the image

Use the ImagickDraw class;

Step 1 instantiate the ImagickDraw class:

$draw=new ImagickDraw();

Set font color

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

Set font size

$draw->setFontSize('25');

Set font

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

Set font direction

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

Ps:

Imagick: ALIGN_RIGHT to the right

Imagick: Left of ALIGN_LEFT

Imagick: Intermediate ALIGN_CENTER

Set the font encoding format

$draw->setTextEncoding("utf-8")

Draw text

$draw->annotation(200,200,'GDP')；

Draw on the bottom plate;

$img->drawImage($draw)；