Logan-Luis-Nick-Bitmap-Final

.eslintignore

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+**/node_modules/*
+**/vendor/*
+**/*.min.js
+**/coverage/*
+**/build/*

.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
+  },
+  "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

index.js

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+'use strict';
+
+const Bitmap = require(`${__dirname}/model/bitmap-constructor.js`);
+const ColorTransform = require(`${__dirname}/model/color-constructor.js`);
+const fileHelper = require(`${__dirname}/lib/bitmap-file-helper.js`);
+
+module.exports = exports = {};
+
+exports.invertBitmap = () => {
+  let onRead = (err, data) => {
+    if (err) throw err;
+
+    let bitmap = new Bitmap(data);
+    let transform = new ColorTransform();
+    let copied = new Buffer(data);
+
+    bitmap.colorTable = transform.invertColors(bitmap);
+
+    let startToColorTable = copied.slice(0, bitmap.headerSize + 14);
+    let subColorTableBuffer = new Buffer(bitmap.colorTable.join(''), 'hex');
+    let colorTableToEnd = copied.slice(data.readInt32LE(10));
+    let testcopy = Buffer.concat([startToColorTable, subColorTableBuffer, colorTableToEnd]);
+
+    fileHelper.writeNew(`${__dirname}/assets/palette-invert-bitmap.bmp`, testcopy, exports.writeNew);
+  };
+  fileHelper.initFile(`${__dirname}/assets/palette-bitmap.bmp`, onRead);
+};
+
+exports.colorShiftBitmap = () => {
+  let onRead = (err, data) => {
+    if (err) throw err;
+
+    let bitmap = new Bitmap(data);
+    let transform = new ColorTransform();
+    let copied = new Buffer(data);
+
+    bitmap.colorTable = transform.blueShift(bitmap);
+
+    let startToColorTable = copied.slice(0, bitmap.headerSize + 14);
+    let subColorTableBuffer = new Buffer(bitmap.colorTable.join(''), 'hex');
+    let colorTableToEnd = copied.slice(data.readInt32LE(10));
+    let testcopy = Buffer.concat([startToColorTable, subColorTableBuffer, colorTableToEnd]);
+
+    fileHelper.writeNew(`${__dirname}/assets/palette-shift-bitmap.bmp`, testcopy, exports.writeNew);
+  };
+  fileHelper.initFile(`${__dirname}/assets/palette-bitmap.bmp`, onRead);
+};
+
+exports.rotateBitmap = () => {
+  let onRead = (err, data) => {
+    fileHelper.initFile(`${__dirname}/assets/palette-bitmap.bmp`, (err, data) => {
+      if (err) throw err;
+
+      let bitmap = new Bitmap(data);
+      let transform = new ColorTransform();
+      let copied = new Buffer(data);
+
+      bitmap.pixelTable = transform.rotateImage(bitmap);
+
+      let startPixelTable = copied.slice(0, bitmap.pixelArrayStart);
+      let pixelArrBuffer = new Buffer(bitmap.pixelTable.join(''), 'hex');
+      let testcopy = Buffer.concat([startPixelTable, pixelArrBuffer]);
+
+      fileHelper.writeNew(`${__dirname}/assets/palette-rotate-bitmap.bmp`, testcopy, exports.writeNew);
+    });
+  };
+  fileHelper.initFile(`${__dirname}/assets/palette-bitmap.bmp`, onRead);
+};
+
+exports.colorShiftBitmap();
+exports.invertBitmap();
+exports.rotateBitmap();

lib/bitmap-file-helper.js

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+'use strict';
+
+const fs = require('fs');
+
+module.exports = exports = {};
+
+exports.initFile = (path, callback) => {
+  fs.readFile(path, (err, data) => {
+    if(err) return callback(err);
+    return callback(null, data);
+  });
+};
+
+exports.writeNew = (path, data) => {
+  return fs.writeFile(path, data, (err, data) => {
+    if(err) return err;
+    return data;
+  });
+};
+
+exports.eraseFile = (path) => {
+  return fs.writeFile(path, '', (err, data) => {
+    if(err) return err;
+    return data;
+  });
+};

model/bitmap-constructor.js

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+'use strict';
+
+module.exports = function Bitmap (data) {
+  this.type = data.toString('utf-8', 0, 2);
+  this.size = data.readInt32LE(2);
+  this.pixelArrayStart = data.readInt32LE(10);
+  this.headerSize = data.readInt32LE(14);
+  this.bitsPerPixel = data.readInt32LE(28);
+  this.width = data.readInt32LE(18);
+  this.height = data.readInt32LE(22);
+
+  this.colorTableStart = this.headerSize + 14;
+  this.colorTable = data.toString('hex', this.colorTableStart, this.pixelArrayStart).match(/.{1,8}/g);
+  this.rowWidth = Math.ceil(((this.bitsPerPixel * this.width + 31) / 32) * 4);
+  this.pixelTable = data.toString('hex', this.pixelArrayStart, this.size).match(/.{1,2}/g);
+
+  this.colorMap = this.pixelTable.map(function (pix) {
+    return parseInt(pix);
+  });
+};

model/color-constructor.js

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+'use strict';
+
+const ColorTransform = module.exports = function () {};
+
+ColorTransform.prototype.invertColors = function (bitmap) {
+  let colorTable = bitmap.colorTable;
+
+  return colorTable.map(function (hexColor) {
+    let hexArray = hexColor.match(/.{1,2}/g);
+
+    let r = parseInt(hexArray[0], 16);
+    let g = parseInt(hexArray[1], 16);
+    let b = parseInt(hexArray[2], 16);
+    let invertR = (255 - r).toString(16);
+    let invertG = (255 - g).toString(16);
+    let invertB = (255 - b).toString(16);
+
+    let invertArray = [invertR, invertG, invertB, '00'];
+
+    invertArray.forEach(function (val, i) {
+      if (val.length === 1) {
+        invertArray[i] = '0' + invertArray[i];
+      }
+    });
+    invertArray = invertArray.join('');
+    return invertArray;
+  });
+};
+
+ColorTransform.prototype.blueShift = function (bitmap) {
+  let colorTable = bitmap.colorTable;
+  return colorTable.map(function (hexColor) {
+    let hexArray = hexColor.match(/.{1,2}/g);
+
+    let r = parseInt(hexArray[0], 16);
+    let g = parseInt(hexArray[1], 16);
+    let b = parseInt(hexArray[2], 16);
+    let invertR = (Math.ceil(r * 0.1)).toString(16);
+    let invertG = (Math.ceil(g * 0.1)).toString(16);
+    let invertB = (b).toString(16);
+
+    let colorShiftArray = [invertR, invertG, invertB, '00'];
+    colorShiftArray.forEach(function (val, i) {
+      if (val.length === 1) {
+        colorShiftArray[i] = '0' + colorShiftArray[i];
+      }
+    });
+    colorShiftArray = colorShiftArray.join('');
+    return colorShiftArray;
+  });
+};
+
+ColorTransform.prototype.rotateImage = function(bitmap) {
+  let pixelTable = bitmap.pixelTable;
+
+  return pixelTable.reverse();
+};

package.json

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+{
+  "name": "04-bitmap_transformer",
+  "version": "1.0.0",
+  "description": "this project changes a bitmap file into several variations",
+  "main": "index.js",
+  "directories": {
+    "test": "test"
+  },
+  "scripts": {
+    "test": "mocha"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/loganabsher/04-bitmap_transformer.git"
+  },
+  "keywords": [
+    "bitmap"
+  ],
+  "author": "Logan Absher, Luis Manzo, Nick Asmussen",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/loganabsher/04-bitmap_transformer/issues"
+  },
+  "homepage": "https://github.com/loganabsher/04-bitmap_transformer#readme",
+  "devDependencies": {
+    "chai": "^4.1.0",
+    "mocha": "^3.4.2"
+  }
+}