Bhavya, Kyler, Shawn bitmap transform!

.gitignore

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+Created by https://www.gitignore.io/api/macos,node,vim,windows,linux
+
+out.bmp
+### macOS ###
+*.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
+
+
+### Node ###
+node_modules
+# Logs
+logs
+*.log
+npm-debug.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
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules
+jspm_packages
+
+# 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
+
+
+
+### Vim ###
+# swap
+[._]*.s[a-w][a-z]
+[._]s[a-w][a-z]
+# session
+Session.vim
+# temporary
+.netrwhist
+*~
+# auto-generated tag files
+tags
+
+
+### Windows ###
+# Windows image file caches
+Thumbs.db
+ehthumbs.db
+
+# Folder config file
+Desktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Windows Installer files
+*.cab
+*.msi
+*.msm
+*.msp
+
+# Windows shortcuts
+*.lnk
+
+
+### 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*

README.md

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+# Bitmap Transformer
+
+[![N|Solid](http://www.brackeen.com/vga/images/img00023.gif)](https://nodesource.com/products/nsolid)
+
+### Description
+This bitmap 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.
+
+### Summary
+To run the command line interface:
+  - navigate to bitmap-team0 directory
+  - Enter 'node index.js'
+
+It can do transforms:
+  - Invert the colors
+  - Grayscale the colors
+  - (red|green|blue)scale the colors
+
+It can can also:
+  - handle various sized bitmap
+  - handle palette and non-palette bitmaps
+  - handle multiple types of bitmaps (not just BM)
+  - handle LE and BE computers with a single if statement
+  - utilizes a command line interface (CLI)
+  - CLI can select the transforms
+
+To run the gulp automated tests and linter:
+  - navigate to bitmap-team0 directory
+  - Enter 'gulp'
+
+### Dependencies
+
+   - chai
+   - gulp
+   - gulp-eslint
+   - gulp-mocha

bitmap-team0/.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"
+}

bitmap-team0/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() {
+  return gulp.src('./test/*-test.js', {read: false})
+    .pipe(mocha({reporter: 'spec'}));
+});
+
+gulp.task('lint', function() {
+  return gulp.src(['**/*.js', '!node_modules'])
+  .pipe(eslint())
+  .pipe(eslint.format())
+  .pipe(eslint.failAfterError());
+});
+
+gulp.task('default', ['lint', 'test']);

bitmap-team0/index.js

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+'use strict';
+const TB = require('./lib/TransformableBitmap.js');
+var ourTB = new TB('../img/palette-bitmap.bmp');
+
+ourTB.invert().grayscale().colorScale(1, 1.3, 0.8).write('out.bmp');
+console.log('chained transform written to out.bmp');
+
+const chooseTransform = require('./lib/cli.js');
+
+
+chooseTransform();
+// ourTB.invert().grayscale().colorScale(1,1.3,1).write('out.bmp');

bitmap-team0/lib/TransformableBitmap.js

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+'use strict';
+
+const fs = require('fs');
+
+module.exports = TransformableBitmap;
+
+function TransformableBitmap(path) {
+  this.bitmap = fs.readFileSync(path);
+  this.colorTableOffset = 14 + this.bitmap.readUInt32LE(14);
+	//this.width = this.bitmap.readUInt32LE(18);
+	//this.height = this.bitmap.readUInt32LE(22);
+}
+
+TransformableBitmap.prototype.invert = function() {
+  for (var i = 0; i <= 255; i++) {
+    for (var j = 0; j <= 2; j++) {
+      this.bitmap[this.colorTableOffset + i * 4 + j] = 255 - this.bitmap[this.colorTableOffset + i * 4 + j];
+    }
+  }
+  this.write('../img/invert-palette-bitmap.bmp');
+  return this;
+};
+
+TransformableBitmap.prototype.grayscale = function() {
+  for (var i = 0; i <= 255; i++) {
+    var baseOffset = this.colorTableOffset + i * 4;
+    var avg = (this.bitmap[baseOffset + 0] + this.bitmap[baseOffset + 1] + this.bitmap[baseOffset + 2])/3;
+    for (var j = 0; j <= 2; j++) {
+      this.bitmap[baseOffset + j] = avg;
+    }
+  }
+  this.write('../img/grayscale-palette-bitmap.bmp');
+  return this;
+};
+
+TransformableBitmap.prototype.colorScale = function(redFactor, greenFactor, blueFactor) {
+  for (var i = 0; i <= 255; i++) {
+    var baseOffset = this.colorTableOffset + i * 4;
+    this.bitmap[baseOffset] = Math.min(Math.max(blueFactor * this.bitmap[baseOffset], 0), 255);
+    this.bitmap[baseOffset + 1] = Math.min(Math.max(greenFactor * this.bitmap[baseOffset + 1], 0), 255);
+    this.bitmap[baseOffset + 2] = Math.min(Math.max(redFactor * this.bitmap[baseOffset + 2], 0), 255);
+  }
+  this.write('../img/colorScale-palette-bitmap.bmp');
+  return this;
+};
+
+
+TransformableBitmap.prototype.write = function(path) {
+  fs.writeFileSync(path, this.bitmap);
+};

bitmap-team0/lib/cli.js

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+'use strict';
+
+const readline = require('readline');
+const TB = require('./TransformableBitmap.js');
+var ourTB = new TB('../img/palette-bitmap.bmp');
+
+const rl = readline.createInterface({
+  input: process.stdin,
+  output: process.stdout
+});
+
+module.exports = function chooseTransform(){
+
+  rl.question('\nDo you want to choose transformation? y/n or exit  - ', (answer) => {
+    answer = answer.toLowerCase();
+    switch (answer) {
+
+    case 'y':
+      console.log('\nChoose method by pressing specified key!');
+      CLI();
+      break;
+
+    case 'n':
+      console.log('\nRunnig all three transformation!');
+      ourTB.invert().grayscale().colorScale(1,1.3,1);
+      console.log('\nAll three files are generated!!');
+      rl.close();
+      break;
+
+    case 'exit':
+      console.log('\nFunction Exit!!');
+      rl.close();
+      break;
+
+    default: console.log('\nNot right key!!\n', chooseTransform());
+    }
+  });
+  function CLI(){
+    rl.question('\ninvert: enter \'i\' \ngrayscale: enter \'g\'  \ncolorScale: enter \'c\' \nredGreenBleu: enter \'rgb\' \ntype \'exit\' and enter to quit.  - ', (answer) => {
+      answer = answer.toLowerCase();
+      switch (answer) {
+      case 'i': ourTB.invert();
+        console.log('\ninvert-palette-bitmap.bmp file is generatd!!');
+        CLI();
+        break;
+      case 'g':ourTB.grayscale();
+        console.log('\ngrayscale-palette-bitmap.bpm file is generated!');
+        CLI();
+        break;
+      case 'c':ourTB.colorScale();
+        console.log('\ncolorScale-palette-bitmap.bmp file is been generated!');
+        CLI();
+        break;
+      case 'rgb':
+        rl.question('\nChoose BLUE (b) GREEN(g) RED(r) -  ', (answer) => {
+          answer = answer.toLowerCase();
+          switch (answer) {
+          case 'b':
+            ourTB.colorScale(2,1,1);
+            console.log('\nBlue-palette-bitmap.bmp file is generatd!!');
+            CLI();
+            break;
+          case 'g':
+            ourTB.colorScale(1,2,1);
+            console.log('\nGreen-palette-bitmap.bmp file is generatd!!');
+            CLI();
+            break;
+          case 'r':
+            ourTB.colorScale(1,1,2);
+            console.log('\nRed-palette-bitmap.bmp file is generatd!!');
+            CLI();
+            break;
+          default: chooseTransform();
+          }
+        });
+        break;
+      case 'exit':
+        console.log('\nFunction Exit!! \n');
+        rl.close();
+        break;
+      default : console.log('\nNot the right key \n '); CLI();
+      }
+    });
+  }
+};

bitmap-team0/package.json

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+{
+  "name": "bitmap-team0",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "directories": {
+    "test": "test"
+  },
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "devDependencies": {
+    "chai": "^3.5.0",
+    "gulp": "^3.9.1",
+    "gulp-eslint": "^3.0.1",
+    "gulp-mocha": "^3.0.1"
+  }
+}