$ opm get kwanhur/lua-resty-magick

lua-resty-magick

Lua wrapper with magick to process image.

Status

This library is produce ready and under active development.

Synopsis

        lua_package_path "/path/to/lua-resty-magick/lib/?.lua;/path/to/magick/?.lua;;";
    
        server {
            location /t {
                content_by_lua '
                  local magick = require('resty.magick.init')
                  local options = {
                    width = ngx.var.image_width,
                    height = ngx.var.image_height,
                    quality = ngx.var.image_quality,
                    format = ngx.var.image_extension,
                  }
                  local blob = '' -- fetch image blob content by myself
                  local magic = magick:new(options)
                  local ok, err = magic:load()
                  if not ok then
                      ngx.log(ngx.ERR, err)
                      return
                  end
                  magick:resize()
                  local webp_options = { quality = 75, lossless = "0" }
                  ok, err = magic:set_format('webp', webp_options)
                  if not ok then
                      ngx.log(ngx.ERR, err)
                      return
                  end
                  local blob = magic:get_blob()
                  ngx.print(blob)
                ';
            }
        }

Methods

new

syntax: magic = magick:new(options)

Create a new magick object.

load_image

syntax: ok, err = magic:load_image(blob)

Load the specified origin magick image

resize

syntax: ok, err = magic:resize()

Resize the image

set_format

syntax: ok, err = magic:set_format('webp', webp_options)

Set converter target magick image format

get_blob

syntax: blob = magic:get_blob()

Fetch the magick image blob content

Installation

You can install it with opm. Just like that: opm install kwanhur/lua-resty-magick

luarocks install magick

Dependency

• ImageMagick

• GraphicsMagick

• libwebp

Authors

kwanhur <huang_hua2012@163.com>, VIPS Inc.

Copyright and License

This module is licensed under the BSD 2-Clause License .

Copyright (C) 2016, by kwanhur <huang_hua2012@163.com>, VIPS Inc.

All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

• Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

• Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.