zengeld-canvas

High-performance SVG chart rendering engine for financial data visualization

A platform-agnostic rendering library for financial charts. Built in Rust with zero runtime dependencies.

Features

• 96 Drawing Primitives - Fibonacci, Gann, Pitchforks, Elliott Waves, Patterns, Channels, and more
• 45+ Indicator Presets - Pre-configured rendering styles for SMA, RSI, MACD, Bollinger, Ichimoku, etc.
• 12 Series Types - Candlestick, HeikinAshi, Line, Area, Histogram, Baseline, and more
• 14 Multi-Chart Layouts - Grid, split, and custom layouts for dashboards
• Platform Agnostic - RenderContext trait for any rendering backend
• Zero Dependencies - Only serde for serialization
• Theme System - 4 built-in presets (dark, light, high_contrast, cyberpunk) + runtime customization

Installation

cargo add zengeld-canvas

Quick Start

use zengeld_canvas::{Chart, Bar, UITheme};

// Create chart with builder API
let svg = Chart::new(800, 600)
    .bars(&bars)
    .candlesticks()
    .sma(20, "#2196F3")
    .rsi(14)
    .render_svg();

// With theme preset
let theme = UITheme::cyberpunk();
let svg = Chart::new(800, 600)
    .bars(&bars)
    .candlesticks()
    .background(theme.colors.chart.background)
    .colors(theme.colors.series.candle_up_body, theme.colors.series.candle_down_body)
    .render_svg();

Examples

Light Theme	High Contrast Theme
Cyberpunk Theme	Runtime Custom Theme

Theme System

Built-in presets: dark, light, high_contrast, cyberpunk

use zengeld_canvas::{UITheme, RuntimeTheme};

// Static themes (compile-time)
let dark = UITheme::dark();
let light = UITheme::light();

// Runtime themes (modifiable, JSON support)
let mut theme = RuntimeTheme::from_preset("dark").unwrap();
theme.colors.chart.background = "#1a0a2e".to_string();
let json = theme.to_json();

Drawing Primitives

License

MIT OR Apache-2.0

Support the Project

If you find this library useful, consider supporting development: