[Repost] Nginx Image Module Picture Thumbnail Watermark Processing Module

https://www.cnblogs.com/jicki/p/5546972.html

 https://www.cnblogs.com/jicki/p/5546972.html< /pre> 

https://www.cnblogs.com/jic ki/p/5546972.html

Nginx Image Module image thumbnail watermark processing module

Download Tengine

tar -zxvf tengine-1.4.5.tar.gz

cd tengine-1.4.5

< p> Download Nginx

tar -zxvf nginx-1.4.0.tar.gz

cd nginx-1.4.0

wget https://github. com/3078825/nginx-image/archive/master.zip

unzip master.zip

./configure --add-module=/opt/software/nginx-image-master

make

make install

p>

Configuration method

Open nginx.conf

In

location / {

#Add the following configuration

Image on;

Image_output on;

}

Or open the specified directory

location /upload {

image on;

image_output on;

}

< p>

Other parameter description:

image on/off Whether to turn on the thumbnail function, the default is off

image_backend on/off Whether to turn on the mirroring service, when this function is turned on, if you request a picture that does not exist in the directory (judging the original picture), the original picture will be automatically downloaded from the mirror server address

image_backend_server mirror server address

If image_output on/off does not generate images but directly processed and output the default off

image_jpeg_quality 75 The default quality of the generated JPEG images is 75

image_water on/off Whether to enable the watermark function

image_water_type 0/1 Watermark type 0: image watermark 1: text watermark

image_water_min 300 300 image width 300 height 300 only add watermark

< p>image_water_pos 0-9 The default value of watermark position is 9 0 is a random position, 1 is the top left, 2 is the top center, 3 is the top right, 4 is the middle left, 5 is the middle center, 6 is the middle right, 7 is The bottom is left, 8 is the bottom is centered, and 9 is the bottom is right

image_water_file watermark file (jpg/pn g/gif), watermark image with absolute path or relative path

image_water_transparent watermark transparency, default 20

image_water_text watermark text "Power By Vampire"

image_water_font_size watermark The default size is 5

image_water_font text watermark font file path

image_water_color watermark text color, default #000000

< p>

Calling instructions

Here, suppose your nginx access address is http:/ /127.0.0.1/

And there is a picture of test.jpg in the root directory of the nginx website

By visiting

http://127.0.0.1/test .jpg!c300x200.jpg will generate/output a 300x200 thumbnail of test.jpg

where c is the parameter for generating the thumbnail of the picture, 300 is the width of the generated thumbnail and 200 is the height of the generated thumbnail< /p>

A total of four different types of thumbnails can be generated.

Support jpeg / png / gif (Gif is turned into a static picture after it is generated)

The C parameter starts at 10% of the height of the picture according to the requested aspect ratio to intercept the picture, and then zoom/zoom in To the specified size (the size of the image thumbnail is equal to the requested width and height)

The M parameter centers the screenshot image according to the requested aspect ratio, and then zooms/enlarges to the specified size (the size of the image thumbnail is equal to the requested width and height)

The T parameter is scaled/zoomed in proportion to the specified size according to the requested aspect ratio (the size of the image thumbnail may be smaller than the requested width and height)

The W parameter is scaled according to the requested aspect ratio/ Zoom in to the specified size, fill the blank with a white background color (the size of the image thumbnail is equal to the requested width and height)

Call example

< p>

http://127.0.0.1/test.jpg!c300x300.jpg

http://127.0.0.1/test.jpg!t300x300.jpg

http://127.0.0.1/test.jpg!m300x300.jpg

http://127.0.0.1/test.jpg!w300x300.jpg

http:/ /127.0.0.1/test.c300x300.jpg

http://127.0.0.1/test.t300x300.jpg

http://127.0.0.1/test.m300x300.jpg

http://127.0.0.1/test.w300x300.jpg