webpconverter_test.js

var exec    = require('child_process').execFile;//get child_process module
var enwebp  = require('./cwebp_test.js');//get cwebp module(converts other image format to webp)
var dewebp  = require('./dwebp_test.js');//get dwebp module(converts webp format to other image)
var gifwebp = require('./gwebp_test.js');//get gif2webp module(convert git image to webp)
var webpmux = require('./webpmux_test.js');//get webpmux module(convert non animated webp images to animated webp)


/******************************************************* cwebp *****************************************************/

//now convert image to .webp format 
module.exports.cwebp = function (input_image, output_image, option, callback) {

  // input_image: input image(.jpeg, .pnp ....)
  //output_image: output image .webp
  //option: options and quality,it should be given between 0 to 100

  var query = option + ' ' + input_image + ' -o ' + output_image;//command to convert image

  console.log(query);

  //enwebp() return which platform webp library should be used for conversion
  exec(enwebp(), query.split(/\s+/), function (error, stdout, stderr) //execute command
  {
    if (error) {
      callback('101', error);//return error code
    } else {
      callback('100', 'Converted Successfully');//return success code
    }
  });
};

/******************************************************* dwebp *****************************************************/

//now convert .webp to other image format 
module.exports.dwebp = function (input_image, output_image, option, callback) {

  // input_image: input image .webp
  //output_image: output image(.jpeg, .pnp ....)
  //option: options and quality,it should be given between 0 to 100

  var query = input_image + ' ' + option + ' ' + output_image;//command to convert image


  console.log(query);

  //dewebp() return which platform webp library should be used for conversion
  exec(dewebp(), query.split(/\s+/), function (error, stdout, stderr) //execute command
  {
    if (error) {
      callback('101', error);//return error code
    } else {
      callback('100', 'Converted Successfully');//return success code
    }
  });
};

/******************************************************* gif2webp *****************************************************/

//now convert .gif image to .webp format 
module.exports.gwebp = function (input_image, output_image, option, callback) {

  // input_image: input image(.jpeg, .pnp ....)
  //output_image: /output image .webp
  //option: options and quality,it should be given between 0 to 100


  var query = option + ' ' + input_image + ' -o ' + output_image;//command to convert image

  //gifwebp() return which platform webp library should be used for conversion
  exec(gifwebp(), query.split(/\s+/), function (error, stdout, stderr) //execute command
  {
    if (error) {
      callback('101', error);//return error code
    } else {
      callback('100', 'Converted Successfully');//return success code
    }
  });
};

/******************************************************* webpmux *****************************************************/

//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Add ICC profile,XMP metadata and EXIF metadata

module.exports.webpmux_add = function (input_image, output_image, icc_profile, option, callback) {

  // input_image: input image(.webp)
  //output_image: output image .webp
  //icc_profile: icc profile
  //option: get or set option (icc,xmp,exif)

  var query = '-set ' + option + ' ' + icc_profile + ' ' + input_image + ' -o ' + output_image;

  //webpmux() return which platform webp library should be used for conversion
  exec(webpmux(), query.split(/\s+/), function (error, stdout, stderr) //execute command
  {
    if (error) {
      callback('101', error);//return error code
    } else {
      callback('100', 'Converted Successfully');//return success code
    }
  });
};

//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Extract ICC profile,XMP metadata and EXIF metadata

module.exports.webpmux_extract = function (input_image, icc_profile, option, callback) {

  // input_image: input image(.webp)
  //icc_profile: icc profile

  var query = '-get ' + option + ' ' + input_image + ' -o ' + icc_profile;

  //webpmux() return which platform webp library should be used for conversion
  exec(webpmux(), query.split(/\s+/), function (error, stdout, stderr) //execute command
  {
    if (error) {
      callback('101', error);//return error code
    } else {
      callback('100', 'Converted Successfully');//return success code
    }
  });
};

//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Strip ICC profile,XMP metadata and EXIF metadata 

module.exports.webpmux_strip = function (input_image, output_image, option, callback) {

  // input_image: input image(.webp)
  //output_image: output image .webp

  var query = '-strip ' + option + ' ' + input_image + ' -o ' + output_image;

  //webpmux() return which platform webp library should be used for conversion
  exec(webpmux(), query.split(/\s+/), function (error, stdout, stderr) //execute command
  {
    if (error) {
      callback('101', error);//return error code
    } else {
      callback('100', 'Converted Successfully');//return success code
    }
  });
};

//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Create an animated WebP file from Webp images 

module.exports.webpmux_animate = function (input_images, output_image, loop, bgcolor, callback) {

  // input_images: array of image(.webp)
  //output_image: animatedimage .webp
  //loop:Loop the frames n number of times
  //bgcolor: Background color of the canvas

  var files = '-frame ' + input_images[0];

  var j = input_images.length;

  for (i = 1; i < j; i++) {
    files = files + ' -frame ' + input_images[i];
    console.log(files);
  }

  var query = files + ' -loop ' + loop + ' -bgcolor ' + bgcolor + ' -o ' + output_image;

  //webpmux() return which platform webp library should be used for conversion
  exec(webpmux(), query.split(/\s+/), function (error, stdout, stderr) //execute command
  {
    if (error) {
      callback('101', error);//return error code
    } else {
      callback('100', 'Converted Successfully');//return success code
    }
  });
};

//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Get the a frame from an animated WebP file

module.exports.webpmux_getframe = function (input_image, output_image, frame_number, callback) {

  // input_image: input image(.webp)
  //output_image: output image .webp
  //frame_number: frame number

  var query = '-get frame ' + frame_number + ' ' + input_image + ' -o ' + output_image;

  //webpmux() return which platform webp library should be used for conversion
  exec(webpmux(), query.split(/\s+/), function (error, stdout, stderr) //execute command
  {
    if (error) {
      callback('101', error);//return error code
    } else {
      callback('100', 'Converted Successfully');//return success code
    }
  });
};