newly compiled dist files

Bumps [lint-staged](https://github.com/okonet/lint-staged) from 12.3.5 to 12.3.7.
- [Release notes](https://github.com/okonet/lint-staged/releases)
- [Commits](https://github.com/okonet/lint-staged/compare/v12.3.5...v12.3.7)

---
updated-dependencies:
- dependency-name: lint-staged
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Jeffrey Warren <jeff@unterbahn.com>

.github/CODEOWNERS

@@ -44,6 +44,7 @@
 /*.lock @ubliclab/is-maintainers
 /Gruntfile.js @publiclab/is-maintainers
 /.github/ @publiclab/is-maintainers
+/scripts/ @publiclab/is-maintainers
 # <-- /COMMON TO ALL MAINTAINERS -->
 
 # <-- SPECIFIC MAINTAINERS -->

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,3 +1,10 @@
+---
+name: Bug report 🐞
+about: Help us identify and fix a bug!
+title: ''
+labels: bug
+---
+
 ### Please describe the problem (or idea)
 
 > What happened just before the problem occurred? Or what problem could this idea solve?
@@ -10,13 +17,13 @@
 
 ### Please show us where to look
 
-https://beta.sequencer.publiclab.org
+Paste in a full URL, starting with:
 
+> https://beta.sequencer.publiclab.org/
 
-### What's your PublicLab.org username?
-
-> This can help us diagnose the issue:
+If you can share a screenshot or a GIF that is EXTRA helpful! 💖
 
+If you can see a version number in the upper right, please note that!
 
 
 ### Browser, version, and operating system

.github/ISSUE_TEMPLATE/enhancement template.md

@@ -0,0 +1,25 @@
+# New Enhancement Request
+
+Describe your enhancement
+
+
+
+
+
+
+ What does your enhancement do?
+
+ Upload Screenshot of your enhancement
+ 
+ ### Please show us where to look
+ Paste in a full URL, starting with:
+ ### Problem it can solve
+ 
+   what problem could this enhancement solve?
+   
+   Your help makes Public Lab better! We *deeply* appreciate your helping refine and improve this site.
+
+To learn how to write really great issues, which increases the chances they'll be resolved, see:
+
+https://publiclab.org/wiki/developers#Contributing+for+non-coders
+### Thank you :)

.github/ISSUE_TEMPLATE/feature request.md

@@ -0,0 +1,22 @@
+# New Feature Request
+
+Describe your feature
+
+
+
+
+
+
+ What does your feature do?
+
+ Upload Screenshot of your implementation/feature
+ 
+ ### Please show us where to look
+ Paste in a full URL, starting with:
+ ### Problem it can solve
+ Your help makes Public Lab better! We *deeply* appreciate your helping refine and improve this site.
+
+To learn how to write really great issues, which increases the chances they'll be resolved, see:
+
+https://publiclab.org/wiki/developers#Contributing+for+non-coders
+### Thank you :)

.github/ISSUE_TEMPLATE/release_workflow.md

@@ -0,0 +1,51 @@
+---
+name: New release checklist ✅
+about: Coordinate steps to publish a new release
+title: 'Checklist and coordination for v0.0.0 major/minor/patch release'
+labels: release
+assignees: '@publiclab/is-maintainers'
+---
+
+This template guides us through the steps of creating a new release, based on conversation and testing in [#1692](https://github.com/publiclab/image-sequencer/issues/1692).
+
+Discuss with @publiclab/is-maintainers if anything is ambiguous!
+
+<!-- NOTE: Change v0.0.0 to the appropriate release version -->
+
+* [x] open an issue using the "release" template with this checklist with title `Checklist and coordination for v0.0.0 major/minor/patch release` (see [semantic versioning](https://docs.npmjs.com/about-semantic-versioning/))
+* [ ] create a release draft in https://github.com/publiclab/image-sequencer/releases
+* [ ] auto-compile release notes and copy below from corresponding release draft
+* [ ] open a pull request with updated version numbers
+    * [ ] update version number in `package.json` (ex #1695)
+    * [ ] update version number in `examples/sw.js` (ex #1734)
+    * [ ] run `npm install` to update `package-lock.json` (from recent node version - 16 at time of writing, in GitPod should work)
+    * [ ] check in `package-lock.json`
+* [ ] finalize and merge to `main` branch (freeze merges to `main` branch until next step)
+
+Now, move to `stable` branch:
+
+* [ ] force push from `main` to `stable`
+* [ ] then in `stable` branch, compile `dist/` files with `grunt build`
+* [ ] add `dist/` files with `git add -f dist/*` and commit them to `stable` branch
+* [ ] publish `stable` branch to `npm` with `npm publish` (logging in first as necessary)
+
+Draft a release:
+
+* [ ] [create a release on GitHub](https://github.com/publiclab/image-sequencer/releases) and reconcile with features description + release notes from below
+* [ ] tag version number branch (i.e. `v0.0.0`) based on `stable` or choose `stable`
+* [ ] publish to live Github pages [demo](https://sequencer.publiclab.org) (with [bash script](https://github.com/publiclab/image-sequencer/pull/1703) from `/scripts/update-demo`) (from within GitPod works well)
+* [ ] move anything necessary to next release project, i.e. <!-- Update this link -->https://github.com/publiclab/image-sequencer/projects/[insert project number]
+* [ ] close this issue!
+
+Noting we're now in this process in https://github.com/publiclab/image-sequencer/issues/1751 for `v3.7.0`.
+
+****
+
+### Release notes
+Compile and edit release notes below, to be copied into the release description.
+
+#### Added
+
+#### Fixed
+
+#### Changed

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,16 +1,19 @@
-Fixes #0000  (<=== Replace `0000` with the Issue Number)
+<!--- (Replace `0000` with the Issue Number below) --->
+Fixes #0000  
 
-Make sure these boxes are checked before your pull request (PR) is ready to be reviewed and merged. Thanks!
+
+<!---Make sure these boxes are checked before your pull request (PR) is ready to be reviewed and merged. Thanks!--->
 
 * [ ] tests pass -- look for a green checkbox ✔️ a few minutes after opening your PR -- or run tests locally with `npm run test-all`
 * [ ] code is in uniquely-named feature branch and has no merge conflicts
 * [ ] PR is descriptively titled
-* [ ] ask `@publiclab/is-reviewers` for help, in a comment below
+* [ ] ask `@publiclab/is-reviewers` for help, in a comment below 
+* [ ] at least 2 reviews required for getting pull request merged
 * [ ] Insert-step functionality is working correct as expected.
-> We're happy to help you get this ready -- don't be afraid to ask for help, and **don't be discouraged** if your tests fail at first!
+<!--- We're happy to help you get this ready -- don't be afraid to ask for help, and **don't be discouraged** if your tests fail at first!--->
 
-If tests do fail, click on the red `X` to learn why by reading the logs.
+<!---If tests do fail, click on the red `X` to learn why by reading the logs.--->
 
-Please be sure you've reviewed our contribution guidelines at https://publiclab.org/contributing-to-public-lab-software
-Please make sure to get at least two reviews before asking for merging the PR as that would make the PR more reliable on our part
-Thanks!
+<!---Please be sure you've reviewed our contribution guidelines at https://publiclab.org/contributing-to-public-lab-software--->
+<!---Please make sure to get at least two reviews before asking for merging the PR as that would make the PR more reliable on our part
+Thanks!--->

.github/dependabot.yml

@@ -0,0 +1,25 @@
+version: 2
+updates:
+- package-ecosystem: npm
+  directory: "/"
+  schedule:
+    interval: daily
+  open-pull-requests-limit: 10
+  ignore:
+  - dependency-name: jest-puppeteer
+    versions:
+    - 5.0.1
+    - 5.0.2
+  - dependency-name: geotiff
+    versions:
+    - 1.0.2
+  - dependency-name: "@babel/core"
+    versions:
+    - 7.13.13
+  - dependency-name: puppeteer
+    versions:
+    - 5.2.1
+    - 7.1.0
+  - dependency-name: tape
+    versions:
+    - 5.1.1

.github/workflows/rebase.yml

@@ -0,0 +1,21 @@
+name: Automatic Rebase
+# https://github.com/marketplace/actions/automatic-rebase
+
+on:
+  issue_comment:
+    types: [created]
+jobs:
+  rebase:
+    name: Rebase
+    if: github.event.issue.pull_request != '' && contains(github.event.comment.body, '/rebase')
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout the latest code
+        uses: actions/checkout@v2
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          fetch-depth: 0 # otherwise, you will fail to push refs to dest repo
+      - name: Automatic Rebase
+        uses: cirrus-actions/rebase@1.4
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/tests.yml

@@ -0,0 +1,209 @@
+name: tests
+on: [pull_request]
+jobs:
+  base-tests:
+    runs-on: ubuntu-18.04
+    steps:
+    - uses: actions/checkout@v2
+    - name: Setup node
+      uses: actions/setup-node@v2
+      with:
+        node-version: '12'
+        check-latest: true
+    - name: Cache node modules
+      uses: actions/cache@v2
+      env:
+        cache-name: cache-node-modules
+      with:
+        path: ~/.npm
+        key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
+        restore-keys: |
+          ${{ runner.os }}-build-${{ env.cache-name }}-
+          ${{ runner.os }}-build-
+          ${{ runner.os }}-
+    - name: Install Dependencies
+      run: npm install
+    - name: "Base istanbul/tape node tests"
+      run: npm test
+
+  benchmark-tests:
+    runs-on: ubuntu-18.04
+    steps:
+    - uses: actions/checkout@v2
+    - name: Setup node
+      uses: actions/setup-node@v2
+      with:
+        node-version: '12'
+        check-latest: true
+    - name: Cache node modules
+      uses: actions/cache@v2
+      env:
+        cache-name: cache-node-modules
+      with:
+        path: ~/.npm
+        key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
+        restore-keys: |
+          ${{ runner.os }}-build-${{ env.cache-name }}-
+          ${{ runner.os }}-build-
+          ${{ runner.os }}-
+    - name: Install Dependencies
+      run: npm install
+    - name: "Benchmark tests"
+      run: npm run benchmark
+
+  gif-tests:
+    runs-on: ubuntu-18.04
+    steps:
+    - uses: actions/checkout@v2
+    - name: Setup node
+      uses: actions/setup-node@v2
+      with:
+        node-version: '12'
+        check-latest: true
+    - name: Cache node modules
+      uses: actions/cache@v2
+      env:
+        cache-name: cache-node-modules
+      with:
+        path: ~/.npm
+        key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
+        restore-keys: |
+          ${{ runner.os }}-build-${{ env.cache-name }}-
+          ${{ runner.os }}-build-
+          ${{ runner.os }}-
+    - name: Install Dependencies
+      run: npm install
+    - name: "Gif tests"
+      run: npm run gif-test
+
+  browserify-core-tests:
+    runs-on: ubuntu-18.04
+    steps:
+    - uses: actions/checkout@v2
+    - name: Setup node
+      uses: actions/setup-node@v2
+      with:
+        node-version: '12'
+        check-latest: true
+    - name: Cache node modules
+      uses: actions/cache@v2
+      env:
+        cache-name: cache-node-modules
+      with:
+        path: ~/.npm
+        key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
+        restore-keys: |
+          ${{ runner.os }}-build-${{ env.cache-name }}-
+          ${{ runner.os }}-build-
+          ${{ runner.os }}-
+    - name: Install Dependencies
+      run: npm install
+    - run: sudo apt-get install xvfb
+    - name: "Browserify core tests and run"
+      run: grunt tests && xvfb-run --auto-servernum npm run core-tests
+
+  jsmine-ui-tests:
+    runs-on: ubuntu-18.04
+    steps:
+    - uses: actions/checkout@v2
+    - name: Setup node
+      uses: actions/setup-node@v2
+      with:
+        node-version: '12'
+        check-latest: true
+    - name: Cache node modules
+      uses: actions/cache@v2
+      env:
+        cache-name: cache-node-modules
+      with:
+        path: ~/.npm
+        key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
+        restore-keys: |
+          ${{ runner.os }}-build-${{ env.cache-name }}-
+          ${{ runner.os }}-build-
+          ${{ runner.os }}-
+    - name: Install Dependencies
+      run: npm install
+    - name: "Jasmine UI tests (mocked browser env)"
+      run: npm run test-ui
+
+  jest-ui-tests:
+    runs-on: ubuntu-18.04
+    steps:
+    - uses: actions/checkout@v2
+    - name: Setup node
+      uses: actions/setup-node@v2
+      with:
+        node-version: '12'
+        check-latest: true
+    - name: Cache node modules
+      uses: actions/cache@v2
+      env:
+        cache-name: cache-node-modules
+      with:
+        path: ~/.npm
+        key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
+        restore-keys: |
+          ${{ runner.os }}-build-${{ env.cache-name }}-
+          ${{ runner.os }}-build-
+          ${{ runner.os }}-
+    - name: Install Dependencies
+      run: npm install
+    - name: "jest-puppeteer UI tests (full browser env)"
+      run: npm run test-ui-2    
+
+  cli-tests:
+    runs-on: ubuntu-18.04
+    steps:
+    - uses: actions/checkout@v2
+    - name: Setup node
+      uses: actions/setup-node@v2
+      with:
+        node-version: '12'
+        check-latest: true
+    - name: Cache node modules
+      uses: actions/cache@v2
+      env:
+        cache-name: cache-node-modules
+      with:
+        path: ~/.npm
+        key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
+        restore-keys: |
+          ${{ runner.os }}-build-${{ env.cache-name }}-
+          ${{ runner.os }}-build-
+          ${{ runner.os }}-
+    - name: Install Dependencies
+      run: npm install
+    - name: "CLI tests"
+      run: npm run test-cli
+
+  grunt-build-test:
+    runs-on: ubuntu-18.04
+    steps:
+    - uses: actions/checkout@v2
+    - name: Setup node
+      uses: actions/setup-node@v2
+      with:
+        node-version: '12'
+        check-latest: true
+    - name: Cache node modules
+      uses: actions/cache@v2
+      env:
+        cache-name: cache-node-modules
+      with:
+        path: ~/.npm
+        key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
+        restore-keys: |
+          ${{ runner.os }}-build-${{ env.cache-name }}-
+          ${{ runner.os }}-build-
+          ${{ runner.os }}-
+    - name: Install Dependencies
+      run: npm install
+    - name: "Grunt build test of dev environment"
+      run: grunt build
+
+## Cache NPM folder
+# cache:
+#   directories:
+#     - ~/.npm
+#     - ~/.cache

.gitpod.dockerfile

@@ -3,5 +3,66 @@ FROM gitpod/workspace-full
 USER root
 RUN sudo apt-get update && apt-get install -y apt-transport-https \
  && sudo apt-get install -y \
-    xserver-xorg-dev libxext-dev libxi-dev build-essential libxi-dev libglu1-mesa-dev libglew-dev pkg-config libglu1-mesa-dev freeglut3-dev mesa-common-dev \
+    xserver-xorg-dev \
+    libxext-dev \
+    build-essential \
+    libxi-dev \
+    libglew-dev \
+    pkg-config \
+    libglu1-mesa-dev \
+    freeglut3-dev \
+    mesa-common-dev \
+    x11-apps \
+    libice6 \
+    libsm6 \
+    libxaw7 \
+    libxft2 \
+    libxmu6 \
+    libxpm4 \
+    libxt6 \
+    x11-apps \
+    xbitmaps \
+    ca-certificates \
+    fonts-liberation \
+    libappindicator3-1 \
+    libasound2 \
+    libatk-bridge2.0-0 \
+    libatk1.0-0 \
+    libc6 \
+    libcairo2 \
+    libcairo2-dev \
+    libcups2 \
+    libdbus-1-3 \
+    libexpat1 \
+    libfontconfig1 \
+    libgbm1 \
+    libgcc1 \
+    libgif-dev \
+    libglib2.0-0 \
+    libgtk-3-0 \
+    libjpeg-dev \
+    libnspr4 \
+    libnss3 \
+    libpango-1.0-0 \
+    libpango1.0-dev \
+    libpangocairo-1.0-0 \
+    libstdc++6 \
+    librsvg2-dev \
+    libx11-6 \
+    libx11-xcb1 \
+    libxcb1 \
+    libxcomposite1 \
+    libxcursor1 \
+    libxdamage1 \
+    libxext6 \
+    libxfixes3 \
+    libxi6 \
+    libxrandr2 \
+    libxrender1 \
+    libxss1 \
+    libxtst6 \
+    lsb-release \
+    wget \
+    xdg-utils \
+    xvfb \
  && apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/*

.travis.yml

@@ -23,7 +23,9 @@ jobs:
     - name: "Jasmine UI tests (mocked browser env)"
       script: npm run test-ui
     - name: "jest-puppeteer UI tests (full browser env)"
-      script: npm run test-ui-2
+      script: npm run test-ui-2    
+    - name: "CLI tests"
+      script: npm run test-cli
     - name: "Grunt build test of dev environment"
       script: grunt build
 after_success:

CONTRIBUTING.md

@@ -17,6 +17,7 @@ Most contribution (we imagine) would be in the form of API-compatible modules, w
 * [Ideas](#Contribution-ideas)
 * [Grunt Tasks](#grunt-tasks)
 * [UI Helper Methods](#ui-helper-methods)
+* [Scripts](#scripts)
 
 ****
 
@@ -374,7 +375,7 @@ module.exports =
 We are now using `eslint` and `husky` to help lint and format our code each time we commit. Eslint defines coding standards and helps in cleaning up the code. To run eslint for checking errors globally or within a specific file run:
 
 ```
-npx eslint . 
+npx eslint .
 
 npx eslint <file path>
 ```
@@ -412,15 +413,15 @@ The following command is used for running the tasks: `grunt [task-name]`. Here `
 
 The method returns a scoped `jQuery` object which only searches for elements inside a given scope (a DOM element).
 
-To use the method, 
+To use the method,
 * import the `scopeSelector` and `scopeSelectorAll` methods from `lib/scopeQuery.js`
 * call the methods with scope as a parameter
-	
+
 ```js
 var scopeQuery = require('./scopeQuery');
 
 var $step = scopeQuery.scopeSelector(scope),
-    $stepAll = scopeQuery.scopeSelectorAll(scope);	
+    $stepAll = scopeQuery.scopeSelectorAll(scope);
 ```
 This will return an object with a constructor which returns a `jQuery` object (from inside the scope) but with new `elem` and `elemAll` methods.
 
@@ -433,7 +434,7 @@ This will return an object with a constructor which returns a `jQuery` object (f
 #### Example
 
 ```js
-//The scope is a div element with id=“container“ and there are three divs in it 
+//The scope is a div element with id=“container“ and there are three divs in it
 //with ids „1“, „2“, and „3“, and all of them have a „child“ class attribute
 
 var $step = require('./scopeQuery').scopeSelector(document.getElementById('container'));
@@ -458,3 +459,23 @@ The following code can be used
 $step('query').show().hide();
 $stepAll('q2').show().hide();
 ```
+
+## Scripts
+The following shell scripts are present in the `scripts/` directory.
+
+- `update-gh-pages`: This script can be used to update the `gh-pages` branch of this repo or a fork.
+ This script is not meant to be used directly as it runs in the current working directory.
+ If you run it on your primary local clone, it can **delete** the local changes. This script is made to be used in a github action
+ or in a temporary directory via another script, such as `update-demo`.
+
+  Arguments:
+  1. Repo(to use as upstream) url in the form username/repo (default: publiclab/image-sequencer) NOTE: Github only
+  2. Branch to pull from eg: main or stable (default: stable)
+  3. CNAME URL (default: none)
+  4. Set the fourth argument to anything to bypass the warning. You will have to set this argument if you want to run this script in another script without needing
+  user interaction, such as in a github action.
+
+- `update-demo`: A safe, interactive script that can be used to update the `gh-pages` branch of any image-sequencer fork.
+ This script is safe to use directly because it separately clones the repo in a temporary directory.
+
+  Arguments: None since it is a an *interactive* script, ie it asks the user for input.

docs/MODULES.md

@@ -41,11 +41,12 @@ List of Module Documentations
 36. [Rotate](#rotate-module)
 37. [Saturation](#saturation-module)
 38. [Segmented-Colormap](#segmented-colormap-module)
-39. [Text-Overlay](#text-overlay)
-40. [Threshold](#threshold)
-41. [Tint](#tint)
-42. [WebGL-Distort](#webgl-distort-module)
-43. [White-Balance](#white-balance-module)
+39. [Sharpen](#sharpening-module)
+40. [Text-Overlay](#text-overlay)
+41. [Threshold](#threshold)
+42. [Tint](#tint)
+43. [WebGL-Distort](#webgl-distort-module)
+44. [White-Balance](#white-balance-module)
 
 
 ## add-qr-module
@@ -667,6 +668,20 @@ where `options` is an object with the property `colormap`. `options.colormap` ca
 * A custom array.
 
 
+## sharpen-module
+
+This module is used to sharpen the pixels of the image using a 3x3 convolution filter.
+#### Usage
+
+```js
+  sequencer.loadImage('PATH')
+           .addSteps('sharpen',options)
+           .run()
+```
+
+where `options` is an object with the property `sharpenStrength`, which can be set to achieve the desired level of sharpening on the image.
+
+
 ## Text Overlay
 
 The modules allows to add text to image in both browser and node environment. We have the options to modify the font-size and also support few font-styles. The text color can also be modified.

examples/demo.css

@@ -1,12 +1,8 @@
 /* https://github.com/theleagueof/league-spartan */
 @font-face {
   font-family: 'League Spartan';
-  src: url('https://raw.githubusercontent.com/theleagueof/league-spartan/master/_webfonts/leaguespartan-bold.eot');
-  src: url('https://raw.githubusercontent.com/theleagueof/league-spartan/master/_webfonts/leaguespartan-bold.eot?#iefix') format('embedded-opentype'),
-       url('https://raw.githubusercontent.com/theleagueof/league-spartan/master/_webfonts/leaguespartan-bold.woff2') format('woff2'),
-       url('https://raw.githubusercontent.com/theleagueof/league-spartan/master/_webfonts/leaguespartan-bold.woff') format('woff'),
-       url('https://raw.githubusercontent.com/theleagueof/league-spartan/master/_webfonts/leaguespartan-bold.ttf') format('truetype'),
-       url('https://raw.githubusercontent.com/theleagueof/league-spartan/master/_webfonts/leaguespartan-bold.svg#league_spartanbold') format('svg');
+  src: url('https://cdn.jsdelivr.net/npm/fontsource-league-spartan@3/files/league-spartan-latin-600-normal.woff2') format('woff2'),
+       url('https://cdn.jsdelivr.net/npm/fontsource-league-spartan@3/files/league-spartan-latin-600-normal.woff') format('woff');
   font-weight: bold;
   font-style: normal;
 }
@@ -82,7 +78,8 @@ body > .container-fluid {
 }
 
 .hover {
-  background: #eee;
+  border: 4px dashed #888888;
+  background: #F0F0F0;
 }
 
 .step {
@@ -175,8 +172,8 @@ body > .container-fluid {
 
 #move-up {
   position: fixed;
-  bottom: 50px;
-  right: 40px;
+  bottom: 30px;
+  right: 20px;
   z-index: 550;
   display: none;
   background:transparent;
@@ -184,11 +181,17 @@ body > .container-fluid {
 }
 
 #move-up i {
-  font-size:60px;
+  font-size:50px;
   opacity:0.7;
   color:#BABABA;
 }
 
+@media (max-width: 768px), (max-height 700px) {
+  #move-up {
+    display: none !important; /* !important is used to override the jQuery style */
+  }
+}
+
 .btn-circle{
   min-width: 80px;
   min-height: 80px;
@@ -337,21 +340,47 @@ a.name-header{
   display: block;
 }
 
-#update-prompt-modal {
+#update-prompt-modal,.notify-box {
  visibility: hidden;
  min-width: 250px;
  margin-left: -125px;
  background-color: #333;
  color: #fff;
  text-align: center;
- border-radius: 2px;
+ border-radius: 8px;
  padding: 16px;
  position: fixed;
  z-index: 1000;
  left: 10%;
  top: 30px;
 }
-#update-prompt-modal.show {
+
+#update-prompt-modal {
+  width: 30vw;
+  margin: 0.2rem;
+}
+
+.notify-box {
+  width:34vw;
+  padding:18px;
+  border-radius:8px;
+  margin-left:0.8rem;
+  text-align:left;
+  color:#333;
+  background:#c3c3c3;
+}
+
+/* Bootstrap class for display none remove it after updating to version v4 */
+.d-none {
+  display:none;
+}
+
+/* Bootstrap class for display block remove it after updating to version v4 */
+.d-block {
+  display:block;
+}
+
+#update-prompt-modal.show,.notify-box {
  visibility: visible;
  -webkit-animation: fadein 0.5s;
  animation: fadein 0.5s;

examples/index.html

@@ -58,6 +58,15 @@
 
   <div id="update-prompt-modal">A new version of image sequencer is available. Click <a href="#" id="reload">here</a> to update.</div>
 
+  <div class="notify-box d-none">
+    <strong>Failed To Load Image</strong>
+    <button type="button" class="ml-2 mb-1 close" id="close-popup"><span>&times;</span></button>
+    <div class="notify-msg">
+      Can not Load Image Due to CORS Error Learn more about this 
+      <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS/Errors" target="_blank">here</a>
+    </div>
+  </div>
+
   <div class="container-fluid">
 
     <header class="text-center">
@@ -66,7 +75,7 @@
         A pure JavaScript sequential image processing system, inspired by storyboards. Instead of modifying the original
         image, it
         creates a new image at each step in a sequence.
-        <a href="https://github.com/publiclab/image-sequencer/blob/main/README.md">Learn more</a>
+        <a href="https://publiclab.org/image-sequencer">Learn more</a>
       </p>
       <p>
         Open Source
@@ -232,7 +241,7 @@
         </div>
       </div>
       <div class="row">
-        <p id="version-number-text">Unable to load version number</p>
+        <p id="version-number-text">Loading Version Number</p>
       </div>
     </footer>
 

examples/lib/cache.js

@@ -1,6 +1,6 @@
 var setupCache = function() {
   let newWorker; // When sw.js is changed, this is the new service worker generated.
-
+  
   // Toggle a CSS class to display a popup prompting the user to fetch a new version.
   function showUpdateModal() {
     $('#update-prompt-modal').addClass('show');
@@ -19,34 +19,42 @@ var setupCache = function() {
     // Register the service worker.
     navigator.serviceWorker.register('sw.js', { scope: '/examples/' })
       .then(function(registration) {
-        registration.addEventListener('updatefound', () => {
-          // When sw.js has been changed, get a reference to the new service worker.
-          newWorker = registration.installing;
-          newWorker.addEventListener('statechange', () => {
-            // Check if service worker state has changed.
-            switch(newWorker.state) {
-              case 'installed':
-                if(navigator.serviceWorker.controller) {
-                  // New service worker available; prompt the user to update.
-                  showUpdateModal();
-                }
-                // No updates available; do nothing.
-                break;
-            }
-          });
-        });
 
-        const installingWorker = registration.installing;
-        installingWorker.onstatechange = () => {
-          console.log(installingWorker);
-          if (installingWorker.state === 'installed') {
-            location.reload();
-          }
-        };
-        console.log('Registration successful, scope is:', registration.scope);
-      })
-      .catch(function(error) {
-        console.log('Service worker registration failed, error:', error);
+          return new Promise(function(resolve,reject){
+
+            registration.addEventListener('updatefound', () => {
+              // When sw.js has been changed, get a reference to the new service worker.
+              newWorker = registration.installing;
+
+              if(!newWorker){
+                return reject(new Error('error in installing service worker'));
+              }
+
+            newWorker.addEventListener('statechange', () => {
+              // Check if service worker state has changed.
+              switch(newWorker.state) {
+                case 'installed':
+                  if(navigator.serviceWorker.controller) {
+                    // New service worker available; prompt the user to update.
+                    showUpdateModal();
+                    $('#reload').on('click',(e) => {
+                      e.preventDefault();
+                      console.log('New Service Worker Installed Successfully');
+                      location.reload();
+                      return resolve();
+                    })
+                  }
+                  // No updates available; do nothing.
+                  break;
+
+                case 'redundant':
+                  return reject(new Error('installing new service worker now became redundant'));
+              }
+            })
+          })
+        })
+      }).catch(err => {
+        console.log('Failed In Registering Service Worker: ',err);
       });
 
       /**
@@ -69,21 +77,22 @@ var setupCache = function() {
     });
   }
 
-  $('#clear-cache').click(function() {
+  const clearCache = () => {
     if ('serviceWorker' in navigator) {
-      caches.keys().then(function(cacheNames) {
-        cacheNames.forEach(function(cacheName) {
-          caches.delete(cacheName);
-        });
+      return caches.keys()
+        .then(function(cache) {
+          return Promise.all(cache.map(function(cacheItem) {
+            return caches.delete(cacheItem);
+        }));
       });
     }
+  }
+
+  $('#clear-cache').click(function() {
+    clearCache();
     location.reload();
   });
 
-
-
-
-
 };
 
 module.exports = setupCache;

examples/lib/defaultHtmlSequencerUi.js

@@ -17,7 +17,6 @@ function DefaultHtmlSequencerUi(_sequencer, options) {
   // look up needed steps from Url Hash:
   function importStepsFromUrlHash() {
     var hash = urlHash.getUrlHashParameter('steps');
-
     if (hash) {
       _sequencer.importString(hash);
       _sequencer.run({ index: 0 });
@@ -27,8 +26,7 @@ function DefaultHtmlSequencerUi(_sequencer, options) {
 
   function selectNewStepUi() {
     var m = $(addStepSel + ' select').val();
-    if(!m) m = arguments[0];
-    else $(addStepSel + ' .info').html(_sequencer.modulesInfo(m).description);
+    if(m) $(addStepSel + ' .info').html(_sequencer.modulesInfo(m).description);
     $(addStepSel + ' #add-step-btn').prop('disabled', false);
   }
 
@@ -47,7 +45,12 @@ function DefaultHtmlSequencerUi(_sequencer, options) {
   }
 
   function addStepUi() {
-    if ($(addStepSel + ' select').val() == 'none') return;
+    
+    if ($(addStepSel + ' select').val() == ''){
+      alert('Please Select a Step to Proceed');
+      return;
+    }
+
     var newStepName;
     if(typeof arguments[0] !== 'string')
       newStepName = $(addStepSel + ' select option').html().toLowerCase().split(' ').join('-');

examples/lib/defaultHtmlStepUi.js

@@ -24,6 +24,9 @@ function DefaultHtmlStepUi(_sequencer, options) {
   function onSetup(step, stepOptions) {
     if (step.options && step.options.description)
       step.description = step.options.description;
+    
+    let stepDocsLink = '';
+    if (step.moduleInfo) stepDocsLink = step.moduleInfo['docs-link'] || '';
 
     step.ui = // Basic UI markup for the step
       '\
@@ -48,7 +51,7 @@ function DefaultHtmlStepUi(_sequencer, options) {
               <div class="row step">\
                 <div class="col-md-4 details container-fluid">\
                   <div class="cal collapse in"><p>' +
-                    '<a href="https://github.com/publiclab/image-sequencer/blob/main/docs/MODULES.md#' + step.name + '-module">' + (step.description || '') + '</a>' +
+                    '<a href="' + stepDocsLink + '">' + (step.description || '') + '</a>' +
                  '</p></div>\
                 </div>\
                 <div class="col-md-8 cal collapse in step-column">\
@@ -118,7 +121,14 @@ function DefaultHtmlStepUi(_sequencer, options) {
               paramVal + '">' + '<span class="input-group-addon"><i></i></span>' +
               '</div>';
           }
-          else { // Non color-picker input types
+          else if(inputDesc.type === 'button'){
+            html = '<div><button name="' + paramName + '" type="' + inputDesc.type + '" >\
+            <i class="fa fa-crosshairs"></i></button>\
+            <span>click to select coordinates</span>\
+            </div>';
+          }
+          else { // Non color-picker input types and other than a button
+
             html =
               '<input class="form-control target" type="' +
               inputDesc.type +
@@ -136,7 +146,7 @@ function DefaultHtmlStepUi(_sequencer, options) {
                 '"max="' +
                 inputDesc.max +
                 '"step="' +
-                (inputDesc.step ? inputDesc.step : 1) + '">' + '<span>' + paramVal + '</span>';
+                inputDesc.step + '">' + '<span>' + paramVal + '</span>';
 
             }
             else html += '">';
@@ -329,12 +339,24 @@ function DefaultHtmlStepUi(_sequencer, options) {
 
     $stepAll('.download-btn').on('click', () => {
 
+      function dataURLtoBlob(dataurl) {
+        let arr = dataurl.split(','), mime = arr[0].match(/:(.*?);/)[1],
+          bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n);
+        while(n--){
+          u8arr[n] = bstr.charCodeAt(n);
+        }
+        return new Blob([u8arr], {type:mime});
+      }
+      
       var element = document.createElement('a');
-      element.setAttribute('href', step.output);
+      
       element.setAttribute('download', step.name + '.' + fileExtension(step.imgElement.src));
       element.style.display = 'none';
       document.body.appendChild(element);
-
+      var blob = dataURLtoBlob(step.output);
+      var objurl = URL.createObjectURL(blob);
+      element.setAttribute('href', objurl);
+      
       element.click();
     });
 
@@ -385,7 +407,7 @@ function DefaultHtmlStepUi(_sequencer, options) {
    */
   function updateDimensions(step){
     _sequencer.getImageDimensions(step.imgElement.src, function (dim) {
-      step.ui.querySelector('.' + step.name).attributes['data-original-title'].value = `<div style="text-align: center"><p>Image Width: ${dim.width}<br>Image Height: ${dim.height}</br>${isGIF(step.output) ? `Frames: ${dim.frames}` : ''}</div>`;
+      step.ui.querySelector('.' + step.name).attributes['data-original-title'].value = `<div style="text-align: center"><p>Image Width: ${dim.width} px<br>Image Height: ${dim.height} px</br>${isGIF(step.output) ? `Frames: ${dim.frames}` : ''}</div>`;
     });
   }
 
@@ -399,6 +421,19 @@ function DefaultHtmlStepUi(_sequencer, options) {
 
     var img = $(step.imgElement);
 
+    let customXCoord = '20'; //default x coordinate
+    let customYCoord = '20'; //default y coordinate
+
+    const customButton = $('button[name="Custom-Coordinates"]');
+      img.click(function(e) {
+          customXCoord = e.offsetX;
+          customYCoord = e.offsetY;
+          customButton.click(function() {
+            $('input[name="x"]').val(customXCoord);
+            $('input[name="y"]').val(customYCoord);
+          })
+      });
+
     img.mousemove(function(e) {
       var canvas = document.createElement('canvas');
       canvas.width = img.width();

examples/lib/mapHtmltypes.js

@@ -7,6 +7,7 @@ function mapHtmlTypes(inputInfo){
   switch(inputInfo.type.toLowerCase()){
   case 'integer':
     htmlType = inputInfo.min != undefined ? 'range' : 'number';
+    if (htmlType === 'range') inputInfo.step = inputInfo.step || 1; // default range step size for integer
     break;
   case 'string':
     htmlType = 'text';
@@ -19,6 +20,10 @@ function mapHtmlTypes(inputInfo){
     break;
   case 'float':
     htmlType = inputInfo.min != undefined ? 'range' : 'text';
+    if (htmlType === 'range') inputInfo.step = inputInfo.step || 0.1; // default range step size for float
+    break;
+  case 'coordinate-input':
+    htmlType = 'button';
     break;
   default:
     htmlType = 'text';

examples/offline.html

@@ -0,0 +1,34 @@
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Error 502 | Bad Gateway</title>
+    <style>
+        body{
+            background-color:#d3d3d3;
+        }
+        p {
+            font-size:20px;
+        }
+        main {
+            display: flex;
+            flex-direction:column;
+            text-align: center;
+            justify-content: center;
+        }
+        a {
+            text-decoration: none;
+            color:blue;
+        }
+        
+    </style>
+</head>
+<body>
+    <main> 
+        <p>Error 502: something went wrong.</p>
+        <p>It seems that you are not connected to internet.<br>Please try after some time.</p>
+        <a href="/">Go To Home Page</a>
+    </main>
+</body>
+</html>

examples/sw.js

@@ -1,6 +1,14 @@
-const staticCacheName = 'image-sequencer-static-v3.5.1';
-self.addEventListener('install', event => {
-  console.log('Attempting to install service worker');
+const staticCacheName = 'image-sequencer-static-v3.7.3';
+self.addEventListener('install', function(e) {
+  e.waitUntil(
+    caches.open(staticCacheName).then(function(cache) {
+      console.log('Attempting to install service worker');
+      return cache.addAll([
+        '/',
+        '/examples/offline.html'
+      ]);
+    })
+  );
 });
 
 self.addEventListener('activate', function(e) {
@@ -21,15 +29,27 @@ self.addEventListener('activate', function(e) {
 
 self.addEventListener('fetch', function(event) {
   event.respondWith(
-    caches.open(staticCacheName).then(function(cache) {
-      return cache.match(event.request).then(function (response) {
-        return response || fetch(event.request).then(function(response) {
-          if(event.request.method == 'GET')
-            cache.put(event.request, response.clone());
-          return response;
+    // Try to fetch the latest data first.
+    fetch(event.request)
+      .then(function(response) {
+        return caches.open(staticCacheName)
+          .then(function(cache) {
+            if(event.request.method == 'GET'){
+              cache.put(event.request.url, response.clone());
+            }
+            return response;
+          });
+      })
+      .catch(function(err) {
+      // Now the request has been failed so show cached data.
+        return caches.match(event.request).then(function(res){
+          if (res === undefined) {
+            // Display offline page
+            return caches.match('offline.html');
+          }
+          return res;
         });
-      });
-    })
+      })
   );
 });
 

index.js

@@ -1,89 +1,5 @@
 #!/usr/bin/env node
 
-require('./src/ImageSequencer');
-sequencer = ImageSequencer({ ui: true });
-var fs = require('fs');
-var program = require('commander');
-var utils = require('./src/CliUtils');
+var cli = require('./src/cli');
 
-var saveSequence = require('./src/cli/saveSequence.js');
-var installModule = require('./src/cli/installModule.js');
-var sequencerSteps = require('./src/cli/sequencerSteps.js');
-
-function exit(message) {
-  console.error(message);
-  process.exit(1);
-}
-
-program
-  .version('0.1.0')
-  .option('-i, --image [PATH/URL]', 'Input image URL')
-  .option('-s, --step [step-name]', 'Name of the step to be added.')
-  .option('-o, --output [PATH]', 'Directory where output will be stored.')
-  .option('-b, --basic', 'Basic mode outputs only final image')
-  .option('-c, --config [Object]', 'Options for the step')
-  .option('--save-sequence [string]', 'Name space separated with Stringified sequence')
-  .option('--install-module [string]', 'Module name space seaprated npm package name')
-  .parse(process.argv);
-
-if (program.saveSequence) saveSequence(program, sequencer);
-
-else if (program.installModule) installModule(program, sequencer);
-
-else {
-  // Parse step into an array to allow for multiple steps.
-  if (!program.step) exit('No steps passed');
-  program.step = program.step.split(' ');
-
-  // User must input an image.
-  if (!program.image) exit('Can\'t read file.');
-
-  // User must input an image.
-  fs.access(program.image, function(err) {
-    if (err) exit('Can\'t read file.');
-  });
-
-  // User must input a step. If steps exist, check that every step is a valid step.
-  if (!program.step || !(utils.validateSteps(program.step, sequencer)))
-    exit('Please ensure all steps are valid.');
-
-  // If there's no user defined output directory, select a default directory.
-  program.output = program.output || './output/';
-
-  // Set sequencer to log module outputs, if any.
-  sequencer.setUI({
-    onComplete: function(step) {
-      // Get information of outputs.
-      step.info = sequencer.modulesInfo(step.name);
-
-      for (var output in step.info.outputs) {
-        console.log('[' + program.step + ']: ' + output + ' = ' + step[output]);
-      }
-    },
-    notify: function(msg) {
-      console.log('\x1b[36m%s\x1b[0m', '🌟  ' + msg);
-    }
-  });
-
-  // Finally, if everything is alright, load the image, add the steps and run the sequencer.
-  sequencer.loadImages(program.image, function() {
-    console.warn(
-      '\x1b[33m%s\x1b[0m',
-      'Please wait \n output directory generated will be empty until the execution is complete'
-    );
-
-    //Generate the Output Directory
-    var outputFilename = program.output.split('/').slice(-1)[0];
-    if (outputFilename.includes('.')) {
-      // user did give an output filename we have to remove it from dir
-      program.output = program.output.split('/').slice(0, -1).join('/');
-    }
-    else {
-      outputFilename = null;
-    }
-
-    sequencerSteps(program, sequencer, outputFilename);
-
-  });
-
-}
+cli(process.argv);

jest-puppeteer.config.js

@@ -1,5 +1,6 @@
 module.exports = {
   launch: {
+    args: ['--no-sandbox', '--disable-setuid-sandbox'], // https://github.com/puppeteer/puppeteer/blob/main/docs/troubleshooting.md#setting-up-chrome-linux-sandbox
     headless: process.env.HEADLESS !== 'false',
   },
   server: {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "image-sequencer",
-  "version": "3.5.1",
+  "version": "3.7.3",
   "description": "A modular JavaScript image manipulation library modeled on a storyboard.",
   "main": "src/ImageSequencer.js",
   "scripts": {
@@ -12,6 +12,7 @@
     "test-all": "npm run test && npm run benchmark && npm run gif-test && grunt tests && npm run core-tests",
     "test-ui": "node node_modules/jasmine/bin/jasmine test/ui/spec/*.js",
     "test-ui-2": "node ./node_modules/.bin/jest",
+    "test-cli": "node test/cli/*.js | tap-spec",
     "setup": "npm i && npm i -g grunt grunt-cli && npm rebuild --build-from-source && grunt build",
     "start": "grunt serve"
   },
@@ -39,12 +40,13 @@
     "base64-img": "^1.0.4",
     "bootstrap": "^3.4.1",
     "bootstrap-colorpicker": "^2.5.3",
-    "buffer": "~5.6.0",
-    "commander": "^4.0.1",
+    "buffer": "~6.0.2",
+    "commander": "^9.0.0",
     "compressorjs": "^1.0.5",
     "data-uri-to-buffer": "^3.0.0",
     "downloadjs": "^1.4.7",
-    "eslint": "^6.1.0",
+    "eslint": "^8.0.0",
+    "expr-eval": "^2.0.2",
     "fisheyegl": "^0.1.2",
     "font-awesome": "~4.7.0",
     "geotiff": "^1.0.0-beta.6",
@@ -52,25 +54,25 @@
     "gifshot": "^0.4.5",
     "glfx": "0.0.4",
     "gpu.js": "^2.3.1",
+    "imgareaselect": "git+https://git@github.com/jywarren/imgareaselect.git#v1.0.0-rc.2",
     "image-sequencer-invert": "^1.0.0",
-    "imagejs": "0.0.9",
+    "imagejs": "git+https://git@github.com/glennjones/imagejs.git#1119a31e6eabc87563bc573cd62c11bd487ce8a9",
     "imagemin": "^7.0.1",
     "imagemin-jpegtran": "^7.0.0",
     "imagemin-pngquant": "^9.0.1",
-    "imgareaselect": "git://github.com/jywarren/imgareaselect.git#v1.0.0-rc.2",
     "istanbul": "^0.4.5",
-    "jasmine": "^3.4.0",
-    "jpegtran-bin": "^5.0.2",
+    "jasmine": "^4.0.2",
+    "jpegtran-bin": "^6.0.1",
     "jquery": "^3.3.1",
-    "jsdom": "^16.3.0",
-    "jspdf": "^1.5.3",
+    "jsdom": "^19.0.0",
+    "jspdf": "^2.1.1",
     "jsqr": "^1.1.1",
     "lodash": "^4.17.11",
     "ndarray": "^1.0.18",
     "opencv.js": "^1.2.1",
-    "ora": "^4.0.3",
+    "ora": "^5.1.0",
     "pace": "0.0.4",
-    "pngquant-bin": "^5.0.2",
+    "pngquant-bin": "^6.0.0",
     "puppeteer": "^1.14.0",
     "qrcode": "^1.3.3",
     "readline-sync": "^1.4.7",
@@ -85,29 +87,31 @@
     "@babel/plugin-proposal-object-rest-spread": "^7.4.3",
     "@babel/plugin-syntax-object-rest-spread": "^7.2.0",
     "babelify": "^10.0.0",
-    "browserify": "16.5.0",
-    "eslint": "^6.1.0",
+    "browserify": "17.0.0",
+    "canvas": "^2.8.0",
+    "eslint": "^8.0.0",
     "grunt": "^1.0.3",
     "grunt-browser-sync": "^2.2.0",
     "grunt-browserify": "^5.0.0",
-    "grunt-contrib-concat": "^1.0.1",
+    "grunt-contrib-concat": "^2.0.0",
     "grunt-contrib-uglify-es": "^3.3.0",
     "grunt-contrib-watch": "^1.1.0",
     "grunt-text-replace": "^0.4.0",
-    "husky": "^3.0.5",
+    "husky": "^7.0.0",
     "image-filter-core": "~2.0.2",
     "image-filter-threshold": "~2.0.1",
-    "jasmine-core": "^3.3.0",
+    "jasmine-core": "^4.0.0",
     "jasmine-jquery": "^2.1.1",
-    "jasmine-spec-reporter": "^4.2.1",
-    "jest": "^26.1.0",
-    "jest-puppeteer": "^4.3.0",
-    "lint-staged": "^10.0.3",
+    "jasmine-spec-reporter": "^7.0.0",
+    "jest": "^27.0.1",
+    "jest-puppeteer": "^6.0.0",
+    "lint-staged": "^12.1.3",
     "looks-same": "^7.0.0",
     "matchdep": "^2.0.0",
+    "resemblejs": "^4.0.1",
     "tap-spec": "^5.0.0",
-    "tape": "^4.9.2",
-    "tape-run": "^8.0.0",
+    "tape": "^5.2.0",
+    "tape-run": "^9.0.0",
     "uglify-es": "^3.3.7"
   },
   "husky": {

scripts/update-demo

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+scriptsDir=$(realpath $(dirname $0))
+
+echo -ne "Enter the repo to push to in the form username/repo (required): "
+read -e pushRepo
+
+echo -ne "Enter repo URL to pull from (upstream) in the form username/repo (default: publiclab/image-sequencer): "
+read -e repoInput
+
+echo -ne "Enter branch name (default: stable): "
+read -e branchInput
+
+echo -ne "Enter CNAME URL(default: none): "
+read -e cnameUrlInput
+
+tempDir=$(mktemp -d)
+pushd $tempDir > /dev/null
+
+git clone https://github.com/$pushRepo
+pushd image-sequencer > /dev/null
+
+$scriptsDir/update-gh-pages "$repoInput" "$branchInput" "$cnameUrlInput" "no warn"
+
+popd > /dev/null
+popd > /dev/null

scripts/update-gh-pages

@@ -0,0 +1,117 @@
+#!/bin/bash
+set -e # So that nothing wrong is published
+
+warn() {
+  echo -e "\033[1;31m
+------IMPORTANT------
+  THIS SCRIPT IS NOT MEANT TO BE USED DIRECTLY, PLEASE NEWLY CLONE THE REPO IN A SEPARATE DIRECTORY AND USE THE SCRIPT THERE.
+  USING THIS SCRIPT IN YOUR MAIN CLONE MAY DELETE YOUR LOCAL CHANGES.
+  This script is made to be reusable: If you want to manually update the demo, \
+  use the interactive script \`update-demo\`. This script can also be used in a github action.
+
+  You can set the 4th argument to anything to bypass this warning. \
+  Setting the 4th argument means that the first 3 arguments are also set which means that you know what you are doing (I assume).
+------IMPORTANT------
+\033[0m"
+
+  echo -ne "Do you still want to continue? [Y/n]: "
+  read -e yN
+
+  case $yN in
+    [yY][eE][sS] | [yY])
+    ;;
+    *)
+      exit 0
+    ;;
+  esac
+}
+
+# --- Constants ---
+deps="jquery bootstrap imgareaselect gifshot downloadjs selectize font-awesome bootstrap-colorpicker jspdf opencv.js/opencv.js" # A list of node_module dependencies to force commit
+# --- Constants ---
+
+# --- Arguments ---
+# $1: Repo(to use as upstream) url in the form username/repo (default: publiclab/image-sequencer) NOTE: Github only
+# $2: Branch to pull from eg: main or stable (default: stable)
+# $3: CNAME URL (default: none)
+# $4: Set the fourth argument to anything to bypass the warning.
+
+if [[ "$1" != "" ]];
+then
+  repo=$1
+else
+  repo="publiclab/image-sequencer"
+fi
+
+if [[ "$2" != "" ]];
+then
+  branch=$2
+else
+  branch="stable"
+fi
+
+if [[ "$3" != "" ]];
+then
+  CNAMEURL=$3
+else
+  CNAMEURL=""
+fi
+# --- Arguments ---
+
+# --- Main Script ---
+if [[ "$4" == "" ]]; # Set a 4th argument to anything to bypass this warning.
+then
+  warn
+fi
+
+git checkout gh-pages
+git remote add upstream https://github.com/$repo
+git fetch upstream
+
+git reset --hard upstream/$branch
+
+echo -e "Running setup script."
+npm run setup
+
+echo -e "Building dist files."
+grunt production
+
+if [ ! -f CNAME ];
+then
+  echo -e "Creating CNAME"
+  touch CNAME
+fi
+
+echo $CNAMEURL > CNAME
+
+echo -e "Removing unnecessary files."
+rm -R docs/
+rm -R test/
+rm CONTRIBUTING.md
+rm index.js
+
+echo -e "Copying important files from src/"
+cp src/ui/prepareDynamic.js prepareDynamic.js
+
+echo "Removing src/"
+rm -R src/
+mkdir -p src/ui/
+mv prepareDynamic.js src/ui/prepareDynamic.js
+
+echo -e "git add dist and node_modules dependencies."
+git add .
+
+for dep in $deps; # Force add node_modules dependencies
+do
+  git add -f node_modules/$dep
+done
+
+git add -f dist/image-sequencer.js
+git add -f dist/image-sequencer-ui.js
+
+echo -e "committing and pusing."
+git commit --no-verify -m "update"
+git push -f
+
+exit 0
+# --- Main Script ---

src/Modules.js

@@ -31,8 +31,10 @@ module.exports = {
   'gradient': require('./modules/Gradient'),
   'grid-overlay': require('./modules/GridOverlay'),
   'import-image': require('./modules/ImportImage'),
+  'mask': require('./modules/Mask'),
   'minify-image': require('./modules/MinifyImage'),
-  // 'invert': require('image-sequencer-invert'),
+  // 'invert': require('image-sequencer-invert'), this code imports the invert module from a different repository altogether (using a require statement)
+  // Which is a powerful feature of ImageSequencer, the modules are independent of the rest of the library's source.
   'invert': require('./modules/Invert'),
   'ndvi': require('./modules/Ndvi'),
   'ndvi-colormap': require('./modules/NdviColormap'),
@@ -43,6 +45,8 @@ module.exports = {
   'resize': require('./modules/Resize'),
   'rotate': require('./modules/Rotate'),
   'saturation': require('./modules/Saturation'),
+  'shadow': require('./modules/Shadow'),
+  'sharpen': require('./modules/Sharpen'),
   'text-overlay': require('./modules/TextOverlay'),
   'threshold': require('./modules/Threshold'),
   'tint': require('./modules/Tint'),

src/cli/index.js

@@ -0,0 +1,102 @@
+require('../ImageSequencer');
+sequencer = ImageSequencer({ ui: true });
+var fs = require('fs');
+var { Command } = require('commander');
+var utils = require('../CliUtils');
+
+var saveSequence = require('./saveSequence.js');
+var installModule = require('./installModule.js');
+var sequencerSteps = require('./sequencerSteps.js');
+
+function exit(message) {
+  console.error(message);
+  process.exit(1);
+}
+
+function executeSteps(program) {
+  // Set sequencer to log module outputs, if any.
+  sequencer.setUI({
+    onComplete: function (step) {
+      // Get information of outputs.
+      step.info = sequencer.modulesInfo(step.name);
+
+      for (var output in step.info.outputs) {
+        console.log('[' + program.step + ']: ' + output + ' = ' + step[output]);
+      }
+    },
+    notify: function (msg) {
+      console.log('\x1b[36m%s\x1b[0m', '🌟  ' + msg);
+    },
+  });
+
+  // Finally, if everything is alright, load the image, add the steps and run the sequencer.
+  sequencer.loadImages(program.image, function () {
+    console.warn(
+      '\x1b[33m%s\x1b[0m',
+      'Please wait \n output directory generated will be empty until the execution is complete'
+    );
+
+    //Generate the Output Directory
+    var outputFilename = program.output.split('/').slice(-1)[0];
+    if (outputFilename.includes('.')) {
+      // user did give an output filename we have to remove it from dir
+      program.output = program.output.split('/').slice(0, -1).join('/');
+    } else {
+      outputFilename = null;
+    }
+
+    sequencerSteps(program, sequencer, outputFilename);
+  });
+}
+
+function parseSteps(program) {
+  // Parse step into an array to allow for multiple steps.
+  if (!program.step) exit('No steps passed');
+  program.step = program.step.split(' ');
+
+  // User must input an image.
+  if (!program.image) exit('Can\'t read file.');
+
+  // User must input an image.
+  fs.access(program.image, function (err) {
+    if (err) exit('Can\'t read file.');
+  });
+
+  // User must input a step. If steps exist, check that every step is a valid step.
+  if (!program.step || !utils.validateSteps(program.step, sequencer))
+    exit('Please ensure all steps are valid.');
+
+  // If there's no user defined output directory, select a default directory.
+  program.output = program.output || './output/';
+
+  executeSteps(program);
+}
+
+function cli(args) {
+
+  let program = new Command();
+
+  program
+    .version('0.1.0')
+    .option('-i, --image [PATH/URL]', 'Input image URL')
+    .option('-s, --step [step-name]', 'Name of the step to be added.')
+    .option('-o, --output [PATH]', 'Directory where output will be stored.')
+    .option('-b, --basic', 'Basic mode outputs only final image')
+    .option('-c, --config [Object]', 'Options for the step')
+    .option(
+      '--save-sequence [string]',
+      'Name space separated with Stringified sequence'
+    )
+    .option(
+      '--install-module [string]',
+      'Module name space seaprated npm package name'
+    )
+    .parse(args);
+
+  const options = program.opts();
+  if (options.saveSequence) saveSequence(options, sequencer);
+  else if (options.installModule) installModule(options, sequencer);
+  else parseSteps(options);
+}
+
+module.exports = cli;

src/modules/BlobAnalysis/Module.js

@@ -10,9 +10,15 @@ module.exports = function BlobAnalysis(options, UI){
   
     var step = this;
 
-    function extraManipulation(pixels){
-  
-      pixels = require('./BlobAnalysis')(pixels);
+    function extraManipulation(pixels, setRenderState, generateOutput){
+      setRenderState(false);
+      if (!options.inBrowser) {
+        require('../_nomodule/gl-context')(input, callback, step, options);
+      } else{
+        pixels = require('./BlobAnalysis')(pixels);
+        setRenderState(true);
+        generateOutput();
+      }
       return pixels;
     }
   

src/modules/ColorHalftone/info.json

@@ -8,7 +8,8 @@
             "desc": "angle of rotation of the halftone patterns in radians",
             "default": "0.25",
             "min": "0",
-            "max": "1.57"
+            "max": "1.57",
+            "step": "0.05"
         },
         "size": {
             "type": "integer",

src/modules/Dynamic/Module.js

@@ -14,20 +14,18 @@ module.exports = function Dynamic(options, UI) {
     options.blue = options.blue || defaults.blue;
     options.green = options.green || defaults.green;
 
+    const Parser = require('expr-eval').Parser;
     function generator(expression) {
-      var func = 'f = function (r, g, b, a) { var R = r, G = g, B = b, A = a; return ' + expression + ';}';
-      var f;
-      eval(func);
-      return f;
+      let expr = Parser.parse('R = r; G = g; B = b; A = a; ' + expression);
+      return expr.toJSFunction("r,g,b,a,R,G,B,A");
     }
-
+    
     var channels = ['red', 'green', 'blue', 'alpha'];
 
     channels.forEach(function(channel) {
       if (channel === 'alpha'){
         options['alpha_function'] = function() { return 255; };
-      }
-      else{
+      } else {
         options[channel + '_function'] = generator(options[channel]);
       }
     });

src/modules/Mask/Module.js

@@ -0,0 +1,82 @@
+module.exports = function Mask(options, UI, util) {
+  var defaults = require('./../../util/getDefaults.js')(require('./info.json'));
+  options.offset = options.offset || defaults.offset;
+  options.resize = options.resize || defaults.resize;
+
+  var output;
+
+  // This function is called on every draw.
+  function draw(input, callback, progressObj) {
+    progressObj.stop(true);
+    progressObj.overrideFlag = true;
+
+    var step = this;
+
+    var getPixels = require('get-pixels');
+
+    // convert offset as string to int
+    if (typeof options.offset === 'string')
+      options.offset = parseInt(options.offset);
+
+    // save first image's pixels
+    var priorStep = this.getStep(options.offset);
+
+    if (priorStep.output === undefined) {
+      this.output = input;
+      UI.notify('Offset Unavailable', 'offset-notification');
+      callback();
+    }
+
+    const alpha_masking = function(c, a) {
+      return (a * c + (255 - a) * c) / 255;
+    };
+    const internalSequencer = ImageSequencer({ inBrowser: false, ui: false });
+    internalSequencer.loadImage(priorStep.output.src, function() {
+      internalSequencer.importJSON([{ 'name': 'resize', 'options': { resize: options.resize } }]);
+      internalSequencer.run(function onCallback(internalOutput) {
+
+        getPixels(internalOutput, function(err, pixels) {
+          options.firstImagePixels = pixels;
+
+          function changePixel(r2, g2, b2, a2, x, y) {
+            let p = options.firstImagePixels;
+            let r1 = p.get(x, y, 0),
+              g1 = p.get(x, y, 1),
+              b1 = p.get(x, y, 2),
+              a1 = p.get(x, y, 3);
+
+            return [alpha_masking(r1, a2), alpha_masking(g1, a2), alpha_masking(b1, a2)];
+          }
+
+          function output(image, datauri, mimetype, wasmSuccess) {
+            step.output = {
+              src: datauri,
+              format: mimetype,
+              wasmSuccess,
+              useWasm: options.useWasm
+            };
+          }
+
+          // run PixelManipulatin on second image's pixels
+          return require('../_nomodule/PixelManipulation.js')(input, {
+            output: output,
+            ui: options.step.ui,
+            changePixel: changePixel,
+            format: input.format,
+            image: options.image,
+            inBrowser: options.inBrowser,
+            callback: callback,
+            useWasm: options.useWasm
+          });
+        });
+      });
+    });
+  }
+
+  return {
+    options: options,
+    draw: draw,
+    output: output,
+    UI: UI
+  };
+};

src/modules/Mask/index.js

@@ -0,0 +1,4 @@
+module.exports = [
+  require('./Module'),
+  require('./info.json')
+];

src/modules/Mask/info.json

@@ -0,0 +1,18 @@
+{
+    "name": "mask",
+    "description": "Masks two images according to their Alpha values",
+    "inputs": {
+      "offset": {
+        "type": "integer",
+        "desc": "Choose which image to mask the current image with. Two steps back is -2, three steps back is -3 etc.",
+        "default": -2
+      },
+      "resize": {
+        "type": "string",
+        "desc": "Percentage value by which first image is to be resized",
+        "default": "125%"
+      }
+    },
+    "docs-link":"https://github.com/publiclab/image-sequencer/blob/main/docs/MODULES.md"
+  }
+  

src/modules/Overlay/Module.js

@@ -1,15 +1,17 @@
 module.exports = function Dynamic(options, UI, util) {
 
-  var defaults = require('./../../util/getDefaults.js')(require('./info.json'));
+  const defaults = require('./../../util/getDefaults.js')(require('./info.json'));
   options.x = options.x || defaults.x;
   options.y = options.y || defaults.y;
 
   if(options.step.inBrowser && !options.noUI && sequencer.getSteps().length < 2)
     options.offset = -1;
 
-  if (options.step.inBrowser && !options.noUI) var ui = require('./Ui.js')(options.step, UI);
+  let ui;
 
-  var output;
+  if (options.step.inBrowser && !options.noUI)  ui = require('./Ui.js')(options.step, UI);
+
+  let output;
 
   // This function is called on every draw.
   function draw(input, callback, progressObj) {
@@ -19,15 +21,15 @@ module.exports = function Dynamic(options, UI, util) {
     progressObj.stop(true);
     progressObj.overrideFlag = true;
 
-    var step = this;
+    const step = this;
 
-    var parseCornerCoordinateInputs = require('../../util/ParseInputCoordinates');
+    const parseCornerCoordinateInputs = require('../../util/ParseInputCoordinates');
 
     // save the pixels of the base image
-    var baseStepImage = this.getStep(options.offset).image;
-    var baseStepOutput = this.getOutput(options.offset);
+    const baseStepImage = this.getStep(options.offset).image;
+    const baseStepOutput = this.getOutput(options.offset);
 
-    var getPixels = require('get-pixels');
+    const getPixels = require('get-pixels');
 
     getPixels(input.src, function(err, pixels) {
       // parse the inputs
@@ -47,20 +49,29 @@ module.exports = function Dynamic(options, UI, util) {
 
       function changePixel(r1, g1, b1, a1, x, y) {
 
+        const firstImagePixels = [r1, g1, b1, a1];
+
         // overlay
-        var p = options.secondImagePixels;
+        const p = options.secondImagePixels;
         if (x >= options.x
           && x - options.x < p.shape[0]
           && y >= options.y
-          && y - options.y < p.shape[1])
-          return [
+          && y - options.y < p.shape[1]){
+
+          const secondImagePixels = [
             p.get(x - options.x, y - options.y, 0),
             p.get(x - options.x, y - options.y, 1),
             p.get(x - options.x, y - options.y, 2),
             p.get(x - options.x, y - options.y, 3)
           ];
+          
+          if(secondImagePixels[3] === 0)
+            return firstImagePixels;
+          else
+            return secondImagePixels;
+        }
         else
-          return [r1, g1, b1, a1];
+          return firstImagePixels;
       }
 
       function output(image, datauri, mimetype, wasmSuccess) {

src/modules/Resize/Resize.js

@@ -2,7 +2,7 @@ const imagejs = require('imagejs'),
   pixelSetter = require('../../util/pixelSetter'),
   ndarray = require('ndarray');
 module.exports = function Resize(pixels, options) {
-  const resize_value = parseInt(options.resize.slice(0, -1));
+  const resize_value = parseFloat(options.resize);
 
   if (resize_value == 100) return pixels;
 

src/modules/Shadow/Module.js

@@ -0,0 +1,146 @@
+/*
+* Create Shadow
+*/
+module.exports = function canvasResize(options, UI) {
+
+  var defaults = require('./../../util/getDefaults.js')(require('./info.json'));
+  const pixelSetter = require('../../util/pixelSetter.js');
+
+  var output;
+
+  function draw(input, callback, progressObj) {
+
+    options.X_value = parseInt(options.X_value || defaults.X_value);
+    options.Y_value = parseInt(options.Y_value || defaults.Y_value);
+
+    progressObj.stop(true);
+    progressObj.overrideFlag = true;
+
+    var step = this;
+
+    function extraManipulation(pixels) {
+      let [w, h] = pixels.shape;
+      let newPixels = require('ndarray')(new Uint8Array(4 * (w + Math.abs(options.X_value)) * (h + Math.abs(options.Y_value))).fill(0), [(w + Math.abs(options.X_value)), (h + Math.abs(options.Y_value)), 4]);
+      let iMax = w,
+        jMax = h;
+      if (options.X_value < 0 && options.Y_value < 0) {
+        for (var k = 0; k < Math.abs(options.X_value); k++) {
+          for (var l = 0; l < (h + Math.abs(options.Y_value)); l++) {
+            let val = 255 - ((k / Math.abs(options.X_value)) * 255);
+            pixelSetter(k, l, [val, val, val, 255], newPixels);
+          }
+        }
+        for (var k = 0; k < (w + Math.abs(options.X_value)); k++) {
+          for (var l = 0; l < Math.abs(options.Y_value); l++) {
+            if (k < Math.abs(options.X_value) && k < l) {
+              continue;
+            }
+            let val = 255 - ((l / Math.abs(options.Y_value)) * 255);
+            pixelSetter(k, l, [val, val, val, 255], newPixels);
+          }
+        }
+        for (let i = 0; i < iMax && i < w; i++) {
+          for (let j = 0; j < jMax && j < h; j++) {
+            let x = i + Math.abs(options.X_value), y = j + Math.abs(options.Y_value);
+            pixelSetter(x, y, [pixels.get(i, j, 0), pixels.get(i, j, 1), pixels.get(i, j, 2), pixels.get(i, j, 3)], newPixels);
+          }
+        }
+      }
+
+      else if (options.X_value >= 0 && options.Y_value >= 0) {
+        for (var k = w; k < (w + options.X_value); k++) {
+          for (var l = 0; l < (h + options.Y_value); l++) {
+            let val = (((k - w) / options.X_value) * 255);
+            pixelSetter(k, l, [val, val, val, 255], newPixels);
+          }
+        }
+        for (var k = 0; k < (w + options.X_value); k++) {
+          for (var l = h; l < (h + options.Y_value); l++) {
+            if (k >= w && l >= h && ((k - w) >= (l - h))) {
+              continue;
+            }
+            let val = ((l - h) / options.Y_value * 255);
+            pixelSetter(k, l, [val, val, val, 255], newPixels);
+          }
+        }
+        for (let i = 0; i < iMax && i < w; i++) {
+          for (let j = 0; j < jMax && j < h; j++) {
+            let x = i, y = j;
+            pixelSetter(x, y, [pixels.get(i, j, 0), pixels.get(i, j, 1), pixels.get(i, j, 2), pixels.get(i, j, 3)], newPixels);
+          }
+        }
+      }
+      
+      else if (options.X_value < 0 && options.Y_value >= 0) {
+        for (var k = 0; k < (w + Math.abs(options.X_value)); k++) {
+          for (var l = h; l < (h + options.Y_value); l++) {
+            let val = ((l - h) / options.Y_value * 255);
+            pixelSetter(k, l, [val, val, val, 255], newPixels);
+          }
+        }
+        for (var k = 0; k < Math.abs(options.X_value); k++) {
+          for (var l = 0; l < (h + options.Y_value); l++) {
+            if (l + (k * (options.Y_value / Math.abs(options.X_value))) - (options.Y_value + h) > 0 && l >= h) {
+              continue;
+            }
+            let val = 255 - ((k / Math.abs(options.X_value)) * 255);
+            pixelSetter(k, l, [val, val, val, 255], newPixels);
+          }
+        }
+        for (let i = 0; i < iMax && i < w; i++) {
+          for (let j = 0; j < jMax && j < h; j++) {
+            let x = i + Math.abs(options.X_value), y = j;
+            pixelSetter(x, y, [pixels.get(i, j, 0), pixels.get(i, j, 1), pixels.get(i, j, 2), pixels.get(i, j, 3)], newPixels);
+          }
+        }
+      }
+
+      else if (options.X_value >= 0 && options.Y_value < 0) {
+        for (var k = w; k < (w + options.X_value); k++) {
+          for (var l = 0; l < (h + Math.abs(options.Y_value)); l++) {
+            let val = (((k - w) / options.X_value) * 255);
+            pixelSetter(k, l, [val, val, val, 255], newPixels);
+          }
+        }
+        for (var k = 0; k < (w + options.X_value); k++) {
+          for (var l = 0; l < Math.abs(options.Y_value); l++) {
+            if (l >= ((options.X_value / Math.abs(options.Y_value)) * (w + options.X_value - k)) && k >= w) {
+              continue;
+            }
+            let val = 255 - (l / Math.abs(options.Y_value) * 255);
+            pixelSetter(k, l, [val, val, val, 255], newPixels);
+          }
+        }
+        for (let i = 0; i < iMax && i < w; i++) {
+          for (let j = 0; j < jMax && j < h; j++) {
+            let x = i, y = j + Math.abs(options.Y_value);
+            pixelSetter(x, y, [pixels.get(i, j, 0), pixels.get(i, j, 1), pixels.get(i, j, 2), pixels.get(i, j, 3)], newPixels);
+          }
+        }
+      }
+      return newPixels;
+    }
+
+    function output(image, datauri, mimetype, wasmSuccess) {
+      step.output = { src: datauri, format: mimetype, wasmSuccess, useWasm: options.useWasm };
+    }
+
+    return require('../_nomodule/PixelManipulation.js')(input, {
+      output: output,
+      ui: options.step.ui,
+      extraManipulation: extraManipulation,
+      format: input.format,
+      image: options.image,
+      inBrowser: options.inBrowser,
+      callback: callback,
+      useWasm:options.useWasm
+    });
+
+  }
+  return {
+    options: options,
+    draw: draw,
+    output: output,
+    UI: UI
+  };
+};

src/modules/Shadow/index.js

@@ -0,0 +1,4 @@
+module.exports = [
+  require('./Module'),
+  require('./info.json')
+];

src/modules/Shadow/info.json

@@ -0,0 +1,17 @@
+{
+  "name": "shadow",
+  "description": "Creates a two sided shadow.",
+  "inputs": {
+    "X_value": {
+      "type": "integer",
+      "desc": "X-value",
+      "default": 20
+    },
+    "Y_value": {
+      "type": "integer",
+      "desc": "Y-value",
+      "default": 20
+    }
+  },
+  "docs-link":"https://github.com/publiclab/image-sequencer/blob/main/docs/MODULES.md#shadow-module"
+}

src/modules/Sharpen/Module.js

@@ -0,0 +1,46 @@
+/*
+  Sharpen an image
+*/
+module.exports = function Sharpen(options, UI) {
+
+  let defaults = require('./../../util/getDefaults.js')(require('./info.json'));
+  options.sharpenStrength = options.sharpenStrength || defaults.sharpenStrength;
+  options.sharpenStrength = parseFloat(options.sharpenStrength); //returns a float
+  let output;
+  
+  function draw(input, callback, progressObj) {
+  
+    progressObj.stop(true);
+    progressObj.overrideFlag = true;
+  
+    let step = this;
+  
+    function extraManipulation(pixels) {
+      pixels = require('./Sharpen')(pixels, options.sharpenStrength);
+      return (pixels);
+    }
+  
+    function output(image, datauri, mimetype, wasmSuccess) {
+      step.output = { src: datauri, format: mimetype, wasmSuccess, useWasm: options.useWasm };
+    }
+  
+    return require('../_nomodule/PixelManipulation.js')(input, {
+      output: output,
+      ui: options.step.ui,
+      inBrowser: options.inBrowser,
+      extraManipulation: extraManipulation,
+      format: input.format,
+      image: options.image,
+      callback: callback,
+      useWasm:options.useWasm
+    });
+  
+  }
+  return {
+    options: options,
+    draw: draw,
+    output: output,
+    UI: UI
+  };
+};
+  

src/modules/Sharpen/Sharpen.js

@@ -0,0 +1,48 @@
+// Generates a 3x3 convolution sharpening kernel
+function kernelGenerator(strength = 1) { //default value of sharpeningStrength set to 1
+
+  let kernel = [
+    [0, -1 * strength, 0],
+    [-1 * strength, 5 * strength, -1 * strength],
+    [0, -1 * strength, 0]
+  ];
+  return kernel;
+}
+
+module.exports = exports = function(pixels, sharpen) {
+  const pixelSetter = require('../../util/pixelSetter.js');
+    
+  let kernel = kernelGenerator(sharpen), // Generate the kernel based on the strength input.
+    pixs = { // Separates the rgb channel pixels to convolve on the GPU.
+      r: [],
+      g: [],
+      b: [],
+    };
+  for (let y = 0; y < pixels.shape[1]; y++){
+    pixs.r.push([]);
+    pixs.g.push([]);
+    pixs.b.push([]);
+
+    for (let x = 0; x < pixels.shape[0]; x++){
+      pixs.r[y].push(pixels.get(x, y, 0));
+      pixs.g[y].push(pixels.get(x, y, 1));
+      pixs.b[y].push(pixels.get(x, y, 2));
+    }
+  }
+
+  const convolve = require('../_nomodule/gpuUtils').convolve; // GPU convolution function.
+
+  const conPix = convolve([pixs.r, pixs.g, pixs.b], kernel); // Convolves the pixels (all channels separately) on the GPU.
+
+  for (let y = 0; y < pixels.shape[1]; y++){
+    for (let x = 0; x < pixels.shape[0]; x++){
+      var pixelvalue = [Math.max(0, Math.min(conPix[0][y][x], 255)),
+        Math.max(0, Math.min(conPix[1][y][x], 255)),
+        Math.max(0, Math.min(conPix[2][y][x], 255))];
+
+      pixelSetter(x, y, pixelvalue, pixels); // Sets the image pixels according to the sharpened values.
+      
+    }
+  }
+  return (pixels);
+};

src/modules/Sharpen/index.js

@@ -0,0 +1,4 @@
+module.exports = [
+  require('./Module'),
+  require('./info.json')
+];

src/modules/Sharpen/info.json

@@ -0,0 +1,15 @@
+{
+    "name": "sharpen",
+    "description": "Applies a sharpening filter given by the intensity value",
+    "inputs": {
+        "sharpenStrength": {
+            "type": "float",
+            "desc": "Amount of sharpening (More sharpening gives more detail, but may lead to overexposure)",
+            "default": 1,
+            "min": 1,
+            "max": 1.5,
+            "step": 0.05
+        }
+    },
+    "docs-link":"https://github.com/publiclab/image-sequencer/blob/main/docs/MODULES.md#sharpen-module"
+}

src/modules/TextOverlay/info.json

@@ -8,6 +8,10 @@
             "desc": "Enter the text to overlay.",
             "default": "Lorem ipsum"
         },
+        "Custom-Coordinates": {
+            "type": "coordinate-input",
+            "desc": "Click to fill Coordinates"
+        },
         "x": {
             "type": "integer",
             "desc": "Starting text horizontal position.",

src/modules/_nomodule/gl-context.js

@@ -15,19 +15,21 @@ module.exports = function runInBrowserContext(input, callback, step, options) {
             is not available otherwise */
       page.goto('https://google.com').then(() => {
         page.addScriptTag({ path: require('path').join(__dirname, '../../../dist/image-sequencer.js') }).then(() => {
-          page.evaluate((options) => {
-            return new Promise((resolve, reject) => {
-              var sequencer = ImageSequencer();
-              sequencer.loadImage(options.input.src);
-              sequencer.addSteps(options.modOptions.step, options.modOptions);
-              sequencer.run(function cb(out) {
-                resolve(sequencer.steps[1].output.src);
+          page.addScriptTag({path: require('path').join(__dirname, '../../../node_modules/opencv.js/opencv.js')}).then(() => {
+            page.evaluate((options) => {
+              return new Promise((resolve, reject) => {
+                var sequencer = ImageSequencer();
+                sequencer.loadImage(options.input.src);
+                sequencer.addSteps(options.modOptions.step, options.modOptions);
+                sequencer.run(function cb(out) {
+                  resolve(sequencer.steps[1].output.src);
+                });
+              });
+            }, obj).then(el => {
+              browser.close().then(() => {
+                step.output = { src: el, format: input.format };
+                callback();
               });
-            });
-          }, obj).then(el => {
-            browser.close().then(() => {
-              step.output = { src: el, format: input.format };
-              callback();
             });
           });
         });

src/ui/LoadImage.js

@@ -7,6 +7,22 @@ function LoadImage(ref, name, src, main_callback) {
     };
     return image;
   }
+
+  // function to check whether a image can be fetched from external source or not
+  function checkForError(image_url) {
+    return fetch(image_url).then(function(res) {
+      if(res)
+        return false;
+      else 
+        return true;
+    }).catch(function(err) {
+      if(err)
+        console.log('Error occured because of image URL ',err);
+
+      return true;
+    });
+  }
+
   function CImage(src, step, callback) {
     var datauri;
     if (src.match(/^data:/i)) {
@@ -25,18 +41,42 @@ function LoadImage(ref, name, src, main_callback) {
       });
     }
     else if (ref.options.inBrowser) {
-      var ext = src.split('.').pop();
-      var image = document.createElement('img');
-      var canvas = document.createElement('canvas');
-      var context = canvas.getContext('2d');
-      image.onload = function() {
-        canvas.width = image.naturalWidth;
-        canvas.height = image.naturalHeight;
-        context.drawImage(image, 0, 0);
-        datauri = canvas.toDataURL(ext);
-        callback(datauri, step);
-      };
-      image.src = src;
+      
+      let notifyBox = document.querySelector('div.notify-box');
+      let closePopUP = document.getElementById('close-popup');
+      if(src.indexOf('images/') !== 0  && src.indexOf('./images/') !== 0 && checkForError(src)){
+
+        if(notifyBox){
+          notifyBox.classList.remove('d-none');
+          notifyBox.classList.add('d-block');
+        }
+
+        if(closePopUP){
+          closePopUP.addEventListener('click',function(){
+            if(notifyBox){
+              notifyBox.classList.remove('d-block');
+              notifyBox.classList.add('d-none');
+            }
+            if(document.querySelector('button.remove'))
+              document.querySelector('button.remove').click(); // Remove the step due to redundant processing.
+            location.reload();
+          });
+        }
+      }
+      else{
+        var ext = src.split('.').pop();
+        var image = document.createElement('img');
+        var canvas = document.createElement('canvas');
+        var context = canvas.getContext('2d');
+        image.onload = function() {
+          canvas.width = image.naturalWidth;
+          canvas.height = image.naturalHeight;
+          context.drawImage(image, 0, 0);
+          datauri = canvas.toDataURL(ext);
+          callback(datauri, step);
+        };
+        image.src = src;
+      }
     }
     else {
       datauri = require('urify')(src);

src/ui/SetInputStep.js

@@ -51,21 +51,49 @@ function setInputStepInit() {
         video.onloadedmetadata = function(e) {
           video.play();
         };
+
+        document.getElementById('capture').addEventListener('click', function(){
+          context.drawImage(video, 0, 0, 400, 300);
+          options.onTakePhoto(canvas.toDataURL());
+          setTimeout(stopStream(stream),1); // wait for 1 second before closing webcam so that image loads properly
+        });
+
         document.getElementById('close').addEventListener('click', function () {
           stopStream(stream);
         });
       }
       function handleError(error) {
         console.log('navigator.getUserMedia error: ', error);
+
+        // when user dismissed the camera access (includes closing of prompt which requests for camera access)
+        if(error.message == 'Permission denied' || error.message == 'NotAllowedError' || error.message == 'PermissionDismissedError'){
+          document.getElementById('capture').addEventListener('click', function(e) {
+            alert('Enable camera access in order to take picture');
+          });
+        }
+        
+        // when user don't have webcam to use.
+        if(error.message == 'NotFoundError' || error.message == 'DevicesNotFoundError'){
+          alert('You do not have appropriate devices to use this Functionality');
+        }
+
+        // when webcam is already used by some other application
+        if(error.message == 'NotReadableError' || error.message == 'TrackStartError' || error.message == 'Concurrent mic process limit'){
+          alert('Your webcam is already in use by some other application');
+        }
+
+        // when some of the requested constraints can't be satisfied like high frame rate or high resolution
+        if(error.message == 'OverconstrainedError' || error.message == 'ConstraintNotSatisfiedError'){
+          console.log('Requested Constraints can not be satisfied ', error);
+        }
       }
       navigator.mediaDevices.getUserMedia(constraints).then(handleSuccess).catch(handleError);
-  
-
-      document.getElementById('capture').addEventListener('click', function(stream){
-        context.drawImage(video, 0, 0, 400, 300);
-        options.onTakePhoto(canvas.toDataURL());
+      
+      document.getElementById('close').addEventListener('click', function() {
+        video.style.display = 'none';
       });
 
+
       function stopStream(stream) {
         stream.getVideoTracks().forEach(function (track) {
           track.stop();
@@ -86,10 +114,10 @@ function setInputStepInit() {
     dropzone[0].addEventListener('drop', handleFile, false);
  
     dropzone.on('dragover', function onDragover(e) {
-      e.stopPropagation();
+      dropzone.addClass('hover');
       e.preventDefault();
-      e.dataTransfer.dropEffect = 'copy'; // Explicitly show this is a copy.
-    }, false);
+      e.stopPropagation();
+    });
  
     dropzone.on('dragenter', function onDragEnter(e) {
       dropzone.addClass('hover');
@@ -99,6 +127,11 @@ function setInputStepInit() {
       dropzone.removeClass('hover');
     });
 
+    dropzone.on('drop', function onDrop(e) {
+      dropzone.removeClass('hover');
+      e.preventDefault();
+    });
+
   };
 
 }

src/util/getDefaults.js

@@ -1,3 +1,4 @@
+/** Parses the defaults and gets the input which is available. */
 module.exports = function(info){
   var defaults = {};
   for (var key in info.inputs) {

src/util/pixelSetter.js

@@ -1,5 +1,12 @@
+/**  
+ * @param {number} x x-coordinate.
+ * @param {number} y y-coordinate.
+ * @param {object} value array [r, g, b, a]
+ * @param {object} pixels NDarray of pixels.
+ * @description Sets the pixels from 0 through length of value. 
+*/
 module.exports = function(x, y, value, pixels){
   for(let i = 0; i < value.length; i++){
     pixels.set(x, y, i, value[i]);
   }
-};
+};

test/cli/saveSequence.js

@@ -0,0 +1,22 @@
+const test = require('tape');
+const cli = require('../../src/cli');
+
+test('testing save sequence function', function (t) {
+  try {
+    cli([
+      'node', 'test',
+      '--save-sequence',
+      '"invert-colormap invert(),colormap()"',
+    ]);
+    t.true(1, 'creation success');
+  } catch (error) {
+    t.true(!error, 'creation fail');
+  }
+  try {
+    cli(['node', 'test', '--save-sequence']);
+    t.true(0, 'creation success');
+  } catch (error) {
+    t.true(1, 'creation fail');
+  }
+  t.end();
+});

test/core/images/moon.js

@@ -0,0 +1,2 @@
+module.exports = 'data:image/png;base64,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';
+//base64 of original unmodified image

test/core/modules/resize.js

@@ -1,4 +1,21 @@
 const testModule = require('../templates/module-test'),
-  benchmark = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABUAAAAVCAYAAACpF6WWAAAAAklEQVR4AewaftIAAAAzSURBVLXBAQEAMAiAME7/zN4Ssr2BzzEJSEACEpCABCQgAQlIQAISkIAEJCABCUhAAhJYclMCJyy7k2QAAAAASUVORK5CYII=';
+  benchmark = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABUAAAAVCAYAAACpF6WWAAAAAklEQVR4AewaftIAAAAzSURBVLXBAQEAMAiAME7/zN4Ssr2BzzEJSEACEpCABCQgAQlIQAISkIAEJCABCUhAAhJYclMCJyy7k2QAAAAASUVORK5CYII=',
 
-testModule('resize', {resize: '129%'}, benchmark);
+  benchmark1 = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAALCAYAAACprHcmAAAAAklEQVR4AewaftIAAAAkSURBVJXBAQEAMAiAME7/zN4Ksr2Bz5EEEkgggQQSSCCBBBIs6poCE8Zr7KAAAAAASUVORK5CYII=',
+
+  benchmark2 = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAYAAACNMs+9AAAAAklEQVR4AewaftIAAAAiSURBVI3BAQEAAAiAIPP/5uqCMAtHIJFEEkkkkUQSSSTRAzwDAhGkYPRhAAAAAElFTkSuQmCC',
+
+  benchmark3 = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAYAAAAGCAYAAADgzO9IAAAAAklEQVR4AewaftIAAAAdSURBVHXBAQEAMAiAME7/zN4Csr2Bz0GCBAkSJCwpbQIJAvmJUgAAAABJRU5ErkJggg==',
+
+  options1 = {
+    resize: '70.85%'
+  },
+  options2 = {
+    resize: '60 %'
+  },
+  options3 = {
+    resize: '40'
+  };
+
+testModule('resize', {resize: '129%'}, benchmark);
+require('../templates/options-test')('resize', [options1, options2, options3], [benchmark1, benchmark2, benchmark3]);

test/core/modules/sharpen.js

@@ -0,0 +1,14 @@
+const testModule = require('../templates/module-test'),
+  image = require('../images/moon'),
+  benchmark = 'data:image/png;base64,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',
+  benchmark1 = 'data:image/png;base64,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',
+  option = {
+    sharpenStrength: 1.0
+  },
+  option1 = {
+    sharpenStrength: 1.5
+  },
+  optionsTest = require('../templates/options-test');
+
+optionsTest('sharpen', [option, option1], [benchmark, benchmark1], image);
+testModule('sharpen', option, benchmark, image);

test/core/sequencer/sw.js

@@ -0,0 +1,37 @@
+var setUpCache = new require('../../../examples/lib/cache')();
+var test = require('tape');
+
+function SWInstallation(){
+    return new Promise(() => {
+      return setupCache();
+    });
+}
+
+function UnRegisterSW(){
+
+    function unregister() {
+        return navigator.serviceWorker.getRegistrations()
+        .then(function(registrations) {
+            var unRegisteredWorker = registrations.map(function(registration) {
+            return registration.unregister();
+            });
+            return Promise.all(unRegisteredWorker);
+        });
+    }
+    
+    return Promise.all([
+        unregister(),
+        setUpCache.clearCache()
+    ]);
+}  
+
+test('Register service worker',function(t) {
+
+    t.test('unregister service worker',function(st) {
+      st.equal(UnRegisterSW(),true,'unregistered successfully and cleared the cache') 
+    })
+
+    t.test('install service worker',function(st) {
+      st.equal(SWInstallation(),true,'successfully installed new service worker')
+    });
+});

test/core/templates/gif-module-test.js

@@ -1,6 +1,8 @@
 const test = require('tape'),
   base64Img = require('base64-img');
 
+const compare = require('resemblejs').compare;
+
 const ImageSequencer = require('../../../src/ImageSequencer');
 
 const test_gif = require('../images/test.gif.js');
@@ -15,19 +17,37 @@ target = 'test_outputs';
  * @param {String} [input="test_gif"] optional input image. Default is a test gif.
  */
 module.exports = (moduleName, options, benchmark, input) => {
-  let sequencer = ImageSequencer({ui: false});
+  let sequencer = ImageSequencer({ ui: false });
   sequencer.loadImages(input || test_gif);
   sequencer.addSteps(moduleName, options);
-  test(`${moduleName} module works correctly`, t => {
-    sequencer.run({mode: 'test'}, () => {
+  test(`${moduleName} module works correctly`, (t) => {
+    sequencer.run({ mode: 'test' }, () => {
       let result = sequencer.steps[1].output.src;
 
       base64Img.imgSync(result, target, `${moduleName}-result`);
       base64Img.imgSync(benchmark, target, `${moduleName}-benchmark`);
 
-      t.equal(result === benchmark, true, `${moduleName} module works correctly with Gif`);
+      let mismatch = 100;
+      compare(
+        result,
+        benchmark,
+        { returnEarlyThreshold: 5 },
+        (err, { rawMisMatchPercentage }) => {
+          if (err) {
+            console.log('An error while comparing!');
+          } else {
+            mismatch = rawMisMatchPercentage;
+          }
+        }
+      );
+
+      t.equal(
+        mismatch < 5,
+        true,
+        `${moduleName} module works correctly with Gif`
+      );
       sequencer = null;
       t.end();
     });
   });
-};
+};

test/core/templates/options-test.js

@@ -24,6 +24,9 @@ module.exports = (moduleName, options, benchmark, input) => {
     sequencer.loadImages(input || red);
     // Add the step.
     sequencer.addSteps(moduleName, options[0]);
+
+    t.plan(2);
+
     // Run the ImageSequencer with initial option.
     sequencer.run(() => {
       let result = sequencer.steps[1].output.src;
@@ -37,7 +40,7 @@ module.exports = (moduleName, options, benchmark, input) => {
       looksSame(result, benchmark[0], function(err, res) {
         if (err) console.log(err);
 
-        t.equal(res.equal, true, `${moduleName} module works correctly with initial option ${options[0][moduleName]}`);
+        t.equal(res.equal, true, `${moduleName} module works correctly with initial option ${JSON.stringify(options[0])}`);
       });
       // Change the option of the given module.
       sequencer.steps[1].setOptions(options[1]);
@@ -54,9 +57,8 @@ module.exports = (moduleName, options, benchmark, input) => {
         looksSame(newResult, benchmark[1], function(err, res) {
           if (err) console.log(err);
 
-          t.equal(res.equal, true, `${moduleName} module works correctly when the option is changed to ${options[1][moduleName]}`);
+          t.equal(res.equal, true, `${moduleName} module works correctly when the option is changed to ${JSON.stringify(options[1])}`);
           sequencer = null;
-          t.end();
         });
       });
     });

test/core/util/gpuUtils.js

@@ -9,7 +9,7 @@ test('convolve works with 1x1 array', t => {
       [1, 1, 1]
     ],
     expectedOut = [
-      [9]
+      new Float32Array([9])
     ];
 
   const out = convolve([array], kernel);
@@ -34,10 +34,10 @@ test('convolve works with 3x4 array', t => {
       [1, 1, 1]
     ],
     expectedOut = [
-      [12, 19, 26],
-      [13, 20, 27],
-      [13, 20, 27],
-      [13, 19, 25]
+      new Float32Array([12, 19, 26]),
+      new Float32Array([13, 20, 27]),
+      new Float32Array([13, 20, 27]),
+      new Float32Array([13, 19, 25])
     ];
 
   const out = convolve([array], kernel);
@@ -68,16 +68,16 @@ test('convolve works with multiple 3x4 arrays', t => {
       [1, 1, 1]
     ],
     expectedOut1 = [
-      [12, 19, 26],
-      [13, 20, 27],
-      [13, 20, 27],
-      [13, 19, 25]
+      new Float32Array([12, 19, 26]),
+      new Float32Array([13, 20, 27]),
+      new Float32Array([13, 20, 27]),
+      new Float32Array([13, 19, 25])
     ],
     expectedOut2 = [
-      [14, 19, 24],
-      [12, 13, 14],
-      [15, 12,  9],
-      [16, 13, 10]
+      new Float32Array([14, 19, 24]),
+      new Float32Array([12, 13, 14]),
+      new Float32Array([15, 12,  9]),
+      new Float32Array([16, 13, 10])
     ];
 
   const out = convolve([array1, array2], kernel);

test/ui/spec/mapHtmlTypes.spec.js

@@ -6,10 +6,12 @@ describe('HTML Types Mapping Function', function() {
     expect(mapHtmlTypes({type: 'percentage'})).toEqual({type: 'number'});
 
     expect(mapHtmlTypes({type: 'integer'})).toEqual({type: 'number'});
-    expect(mapHtmlTypes({type: 'integer', min: 20, max: 100})).toEqual({type: 'range', min: 20, max: 100});
+    expect(mapHtmlTypes({type: 'integer', min: 20, max: 100})).toEqual({type: 'range', min: 20, max: 100, step: 1});
+    expect(mapHtmlTypes({type: 'float', min: 20, max: 100})).toEqual({type: 'range', min: 20, max: 100, step: 0.1}); // should default to step = 1
 
     expect(mapHtmlTypes({type: 'float'})).toEqual({type: 'text'});
-    expect(mapHtmlTypes({type: 'float', min: 20, max: 100})).toEqual({type: 'range', min: 20, max: 100});
+    expect(mapHtmlTypes({type: 'float', min: 20, max: 100})).toEqual({type: 'range', min: 20, max: 100, step: 0.1});
+    expect(mapHtmlTypes({type: 'float', min: 20, max: 100})).toEqual({type: 'range', min: 20, max: 100, step: 0.1}); // should default to step = 0.1
   });
 
   it('maps text type', function() {
@@ -21,4 +23,4 @@ describe('HTML Types Mapping Function', function() {
     expect(mapHtmlTypes({type: 'select'})).toEqual({type: 'select'});
   });
 
-});
+});