Tender

Tender is a general-purpose programming language specially designed for image processing, 2D graphics, scripting, and more! Here is a quick tutorial.

Overview

Tender compiles into bytecode and executes on a stack-based virtual machine (VM) written in native Golang.

Features

• Simple and highly readable syntax
• Compiles to bytecode
• Supports rich built-in functions
• Includes an extensive standard library
• Optimized for 2D graphics

Supported Standard Library

• math: Mathematical constants and functions
• os: Platform-independent interface to OS functionality
• strings: String conversion, manipulation, and regular expressions
• times: Time-related functions
• rand: Random number generation
• fmt: Formatting functions
• json: JSON handling functions
• base64: Base64 encoding and decoding
• hex: Hexadecimal encoding and decoding
• colors: Functions to print colored text to the terminal
• gzip: Gzip compression and decompression
• zip: ZIP archive manipulation
• tar: TAR archive creation and reading
• bufio: Buffered I/O functions
• crypto: Cryptographic functions
• path: File path manipulation
• image: Image manipulation
• canvas: Drawing functions for canvases
• dll: Dynamic link library interactions
• io: Input and output functions
• audio: Audio processing
• net: Networking functions
• http: HTTP client and server utilities
• websocket: WebSocket communication utilities
• gob: Gob Encoding/Ddecoding
• csv: CSV Encoding/Ddecoding

Quick Start

1. Install Tender on your machine.
2. Copy the sample code below:

// Basic example
str1 := "hello"
str2 := "world"

println(str1 + " " + str2)

// Canvas drawing example (similar to JS Canvas)
import "canvas"

var ctx = canvas.new_context(100, 100)
ctx.hex("#0f0")          // Set color to green
ctx.dash(4, 2)           // Define dashed stroke
ctx.rect(25, 25, 50, 50) // Draw a rectangle
ctx.stroke()

ctx.save_png("out.png")  // Save output as PNG

1. Save your code as hello.td (use the .td extension).
2. Run your script using the following command:

tender hello.td

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Installation

Using Go

1. Install the latest version of Go.
2. Run the following command to install:

go install github.com/2dprototype/tender/cmd/tender@latest

Manual Installation (Windows)

Precompiled binaries are available. Download them from the release tags.

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Documentation

• Runtime Types
• Built-in Functions
• Operators
• Standard Library

Examples

Explore various examples demonstrating Tender’s features in the examples directory.

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Dependencies

Tender uses the following dependencies:

• go-mp3
• gorilla/websocket
• ebitengine/oto/v3
• exp/shiny
• fogleman/gg

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Syntax Highlighting

Syntax highlighting is currently available only for Notepad++. Download the configuration file here.

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License

Tender is distributed under the MIT License, with additional licenses provided for third-party dependencies. See LICENSE_GOLANG and LICENSE_TENGO for more information.

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Acknowledgments

Tender is written in Go, based on Tengo. We extend our gratitude to the contributors of Tengo for their valuable work.