https://github.com/formulae-org/package-graphic-raster-js

Raster graphics package for Fōrmulæ, in JavaScript
https://github.com/formulae-org/package-graphic-raster-js

formulae graphic-primitives graphics graphics-programming image-colors image-coordinates image-text image-transformations javascript raster-graphics rotating stroke-imaging turtle-graphics xor-mode

Last synced: 6 months ago
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Raster graphics package for Fōrmulæ, in JavaScript

• Host: GitHub
• URL: https://github.com/formulae-org/package-graphic-raster-js
• Owner: formulae-org
• License: agpl-3.0
• Created: 2023-04-16T00:53:53.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2025-01-02T04:22:30.000Z (9 months ago)
• Last Synced: 2025-01-02T04:27:51.682Z (9 months ago)
• Topics: formulae, graphic-primitives, graphics, graphics-programming, image-colors, image-coordinates, image-text, image-transformations, javascript, raster-graphics, rotating, stroke-imaging, turtle-graphics, xor-mode
• Language: JavaScript
• Homepage:
• Size: 55.7 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# package-graphic-raster-js

Raster graphics package for the [Fōrmulæ](https://formulae.org) programming language.

Fōrmulæ is also a software framework for visualization, edition and manipulation of complex expressions, from many fields. The code for an specific field —i.e. arithmetics— is encapsulated in a single unit called a Fōrmulæ **package**.

This repository contains the source code for the **raster graphics package**. It contains reduction to create

The GitHub organization [formulae-org](https://github.com/formulae-org) encompasses the source code for the rest of packages, as well as the [web application](https://github.com/formulae-org/formulae-js).

### Capabilities ###

* Creation of a blank image

* Creation of a image from a file

* Retrieving the dimensions of an image

* Duplication of an image

* Pixel operations

    Set/Get the color of a single pixel

* Line operations

    * From position to position

    * From position to offset

    * From last position to position

    * From last position to offset

* Rectangle operations

    * Draw from corner to corner

    * Draw from corner to size

    * Fill from corner to corner

    * Fill from corner to size

* Circle/ellipse operations

    * Draw from corner to corner

    * Draw from corner to size

    * Draw given center and radius

    * Fill from corner to corner

    * Fill from corner to size

    * Fill given center and radius

* Arc operations

    * Draw from corner to corner

    * Draw from corner to size

    * Draw given center and radius

    * Fill from corner to corner

    * Fill from corner to size

    * Fill given center and radius

* Insert image into image

* Text operations

    * Retrieve size of text when drawing

    * Draw text

* Turtle graphics

    * Set/get/offset current position

    * Set/get current angle

    * Forward with/without drawing

    * Turn

* Coordinate system operations

    * Reset coordinates

    * Add translation

    * Add scaling

    * Add rotation

    * Set a coordinate system given coordinates of corners

* Set state of painting

    * Set/retrieve current color

    * Set/retrieve stroke width

    * Set whether stroke is affected by scale or not

    * Set mode

       * Normal (paint mode)

       * XOR mode

    * Set drawing arc

       * Open

       * Closed (as pie)

### Gallery

Visit [this Pinterest galley](https://www.pinterest.com/formulae_org/_created/) of images created with Fōrmulæ, using the raster graphics package.