bitmap-megatron-dana

.eslintrc

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+{
+  "rules": {
+    "no-console": "off",
+    "indent": [ "error", 2 ],
+    "quotes": [ "error", "single" ],
+    "semi": ["error", "always"],
+    "linebreak-style": [ "error", "unix" ]
+  },
+  "env": {
+    "es6": true,
+    "node": true,
+    "mocha": true,
+    "jasmine": true
+  },
+  "ecmaFeatures": {
+    "modules": true,
+    "experimentalObjectRestSpread": true,
+    "impliedStrict": true
+  },
+  "extends": "eslint:recommended"
+}

.gitignore

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+
+# Created by https://www.gitignore.io/api/osx,node,linux,windows
+
+### Linux ###
+*~
+
+# temporary files which can be created if a process still has a handle open of a deleted file
+.fuse_hidden*
+
+# KDE directory preferences
+.directory
+
+# Linux trash folder which might appear on any partition or disk
+.Trash-*
+
+# .nfs files are created when an open file is removed but is still being accessed
+.nfs*
+
+### Node ###
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Typescript v1 declaration files
+typings/
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+
+
+### OSX ###
+*.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+### Windows ###
+# Windows thumbnail cache files
+Thumbs.db
+ehthumbs.db
+ehthumbs_vista.db
+
+# Folder config file
+Desktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Windows Installer files
+*.cab
+*.msi
+*.msm
+*.msp
+
+# Windows shortcuts
+*.lnk
+
+# End of https://www.gitignore.io/api/osx,node,linux,windows

README.md

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-![CF](https://camo.githubusercontent.com/70edab54bba80edb7493cad3135e9606781cbb6b/687474703a2f2f692e696d6775722e636f6d2f377635415363382e706e67) Lab 04: Bitmap Transformer
-===
-
-## To Submit this Assignment
-* have team leader fork this repository
-* have team leader add team members as collaborators to the team fork
-* team members should clone team fork
-* write all of your code in a directory name `bitmap-` + `<team name>` **e.g.** `bitmap-weasels`
-* submit a pull request to this repository when done
-* each person will submit a link to their own PR in canvas
-* each person write a question and observation on canvas
-
-#### Rubric:
-* **tests:** 3pts
-* **gulpfile/package.json:** 2pts
-* **read bitmap meta data:** 5pts
-* **successfully apply transforms:** 5pts
-* **project design and organization:** 5pts
-
-## Description
-
-For this assignment you will be building a bitmap (`.bmp`) reader and transformer. It will read a bitmap in from disk, run one or more color transforms on the bitmap and then write it out to a new file. This project will require the use of node buffers in order to manipulate binary data. Your project should include tests, as well as a `gulpfile.js`, `package.json`, `.eslintrc`, `README.md`, and a `.gitignore`. Make sure to run all your code through eslint. The process will look something like this:
-
-1. open the original bitmap file using fs and read it into a buffer
-2. convert the buffer header data into a Javascript Object (using constructors)
-3. run a transform on the buffer directly
-4. write the buffer to a new file
-
-The wikipedia article found here [Bitmap Specification](https://en.wikipedia.org/wiki/BMP_file_format) describes the byte specification of a "windows bitmap file." We'll be working with the simplest version, meaning no compression.
-
-* your project should have three ***(or more)*** transforms
-* invert the colors (***hint:*** subtract every color value from the max color value which is 255),
-* grayscale the colors (***hint:*** multiply each color value by a constant, just make sure your values don't go over 255)
-* (red|green|blue)scale the colors (***hint:*** same as above but only multiply one of the colors)
-
-## Bonus:
-
-* ability to handle various sized bitmap
-* ability to handle LE and BE computers with a single if statement
-* utilizes a command line interface (CLI)
-* CLI can select the transforms
+# BITMAP TRANSFORMER
+Built by TEAM MEGATRON - Khalid Mohamud, Dana Kulp, Regan O'Neill
+
+This program utilizes node.js to read a bitmap data stream, manipulate the stream, and create a new bitmap image to the filesystem.
+
+# Features Include:
+
+  - Read bitmap data stream from operating system
+  - copy data as Buffer object and transform into different data structures in order to transform image.
+  - use object constructor to allow metadata to persist and be reused within application
+  - utilize three methods to transform the original file:
+        1) INVERT COLORS
+        [Imgur](http://i.imgur.com/GPZ8S8J.png)
+        2) GREENSCALE IMAGE
+        [Imgur](http://i.imgur.com/vQXy11e.png)
+        3) GRAYSCALE IMAGE
+        [Imgur](http://i.imgur.com/W2Tu028.png)
+
+You can also:
+  - Run individual methods directly from the CLI to create one (or more) new bitmap files.
+  - run automation testing tools with gulp
+
+### Tech
+
+* [node.js] - evented I/O for the backend
+* [Gulp] - the streaming build system
+
+### Installation
+
+Bitmap Transformer requires [Node.js](https://nodejs.org/) v6+ to run.
+
+Install the dependencies and devDependencies and start the server.
+
+```sh
+$ cd bitmap-megatron
+$ npm i
+$ node index
+[optional single commands include: 'invert', 'grayscale', 'greenscale']
+```
+License
+----
+
+MIT
+
+
+**Free Software, Hell Yeah!**

gulpfile.js

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+'use strict';
+
+const gulp = require('gulp');
+const eslint = require('gulp-eslint');
+const mocha = require('gulp-mocha');
+
+gulp.task('test', function(){
+  gulp.src('./test/*-test.js',{read:false})
+  .pipe(mocha({reporter:'spec'}));
+});//end test task
+
+gulp.task('lint', function(){
+  return gulp.src(['**/*.js', '!node_modules'])
+  .pipe(eslint())
+  .pipe(eslint.format())
+  .pipe(eslint.failAfterError());
+});
+
+gulp.task('default', ['test', 'lint']);

index.js

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+
+'use strict';
+
+const EE = require('events');
+const ee = new EE();
+const fs = require('fs');
+const objConstructor = require(`${__dirname}/models/bitmap-object.js`).ImageObj;
+const invert = require(`${__dirname}/lib/bitmap-transform.js`);
+const greenScale = require(`${__dirname}/lib/bitmap-greenscale.js`);
+const grayScale = require(`${__dirname}/lib/bitmap-grayscale.js`);
+
+ee.on('getFile', function() {
+  fs.readFile(`${__dirname}/assets/palette-bitmap.bmp`, function(err, data) {
+    if (err) throw err;
+    ee.emit('objCreate', data);
+  });
+});
+
+ee.on('objCreate', function(data) {
+  let testObj = new objConstructor(data);
+  ee.emit('transformObj', data);
+});
+
+ee.on('transformObj', function(obj) {
+  for(var i = 2; i < process.argv.length; i++){
+    if (process.argv[i] === 'invert' ) invert(obj);
+    if (process.argv[i] === 'grayscale') grayScale(obj);
+    if (process.argv[i] === 'greenscale') greenScale(obj);
+  }
+  if (!process.argv[2]) {
+    invert(obj);
+    grayScale(obj);
+    greenScale(obj);
+  }
+});
+
+ee.emit('getFile');

lib/bitmap-grayscale.js

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+'use strict';
+
+const fs = require('fs');
+
+module.exports = function grayScale(obj) {
+  let bufferArray = new Int32Array(obj);
+  let metaData = bufferArray.slice(0, 54);
+  let colorTable = bufferArray.slice(54, 1078);
+  let pixelArray = bufferArray.slice(1078);
+
+  let manipulateTable = function(arr, cb) {
+    for (let i = 0; i < arr.length; i += 4) {
+      let scale = colorTable[i];
+      colorTable[i + 1] = scale;
+      colorTable[i + 2] = scale;
+    }
+    cb();
+  };
+
+  let createBuffer = function() {
+    let meta = Buffer.from(metaData);
+    let pixel = Buffer.from(pixelArray);
+    let redScale = Buffer.from(colorTable);
+    let newBuffer = Buffer.concat([meta, redScale, pixel]);
+    writeGrayFile(newBuffer);
+  };
+
+  let writeGrayFile = function(obj) {
+    console.log('gray');
+    fs.writeFile(`${__dirname}/../assets/gray-scale.bmp`, obj, function(err) {
+      if (err) throw err;
+    });
+  };
+  manipulateTable(colorTable, createBuffer);
+};

lib/bitmap-greenscale.js

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+'use strict';
+
+const fs = require('fs');
+
+module.exports = function greenScale(obj) {
+  let bufferArray = new Int32Array(obj);
+  let metaData = bufferArray.slice(0, 54);
+  let colorTable = bufferArray.slice(54, 1078);
+  let pixelArray = bufferArray.slice(1078);
+
+  let manipulateTable = function(arr) {
+    for (var i = 1; i < arr.length; i += 4) {
+      colorTable[i] = 255;
+    }
+    createBuffer();
+  };
+
+  let createBuffer = function() {
+    let meta = Buffer.from(metaData);
+    let pixel = Buffer.from(pixelArray);
+    let redScale = Buffer.from(colorTable);
+    let newBuffer = Buffer.concat([meta, redScale, pixel]);
+    fileHelper(newBuffer);
+  };
+
+
+  let fileHelper = function(obj) {
+    console.log('green');
+    fs.writeFile(`${__dirname}/../assets/green.bmp`, obj, function(err) {
+      if (err) throw err;
+    });
+  };
+  manipulateTable(colorTable);
+};

lib/bitmap-transform.js

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+'use strict';
+
+const fs = require('fs');
+
+module.exports = function invertColors(obj) {
+  let bufferArray = new Int32Array(obj);
+
+  let invertTransform = bufferArray.reduce(function(acc, ele, index) {
+    if (index < 54) acc.push(ele);
+    if (index >= 54 && index < 1078) {
+      let inverted = 255 - ele;
+      acc.push(inverted);
+    }
+    if (index >= 1078) acc.push(ele);
+    return acc;
+  }, []);
+
+  let newBuffer = Buffer.from(invertTransform);
+
+
+  let invertFileHelper = function(obj) {
+    console.log('invert');
+    fs.writeFile(`${__dirname}/../assets/dana-bitmap.bmp`, obj, function(err) {
+      if (err) throw err;
+    });
+  };
+  invertFileHelper(newBuffer);
+};