package-graphic-raster-js's Introduction

package-graphic-raster-js

Raster graphics package for the Fōrmulæ 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 encompasses the source code for the rest of packages, as well as the web application.

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)