blendend

This project provides Elixir bindings to Blend2D .

• blendend is currently in experimental stage. But most of the functionalities have been already implemented.

• Blend2D's rendering engine from plain Elixir.

• Composable drawing pipeline: Canvas, Path, Matrix2D, Text, Style modules.

• A DSL (Blendend.Draw) for concise scripts.

• Support for PNG/QOI export.

Requirements

• The latest Blend2D built and installed on your system
• A C++ toolchain (a C++ compiler + cmake)

Quick build of Blend2D:

git clone https://github.com/blend2d/blend2d
cd blend2d
git clone https://github.com/asmjit/asmjit 3rdparty/asmjit
mkdir build && cd build
cmake ..
make -j$(nproc)
sudo make install

Install in your project

def deps do
  [
    {:blendend, github: "narslan/blendend"}
  ]
end

Then:

mix deps.get
mix compile

Quick start

blendend is meant to feel like a sketchbook: open a canvas, write a few lines, get pixels back. After adding the dependency and compiling, you can start an IEx session or drop a script anywhere in your project. The Blendend.Draw DSL keeps things terse so you can focus on shapes and color rather than boilerplate.

Below, we draw a single white line and write it to disk. Change the block to add circles, text, gradients, or any of the other helpers in Blendend.Draw.

use Blendend.Draw

draw 200, 200, "priv/basic_line.png" do
  line 0, 100, 200, 100, stroke: rgb(255, 255, 255)
end

For a richer starting point, clone the blendend_playground repo and run it to browse and tweak the bundled examples in the browser.

Playground

There is a separate web playground for live editing and rendering, and for browsing the bundled examples: blendend_playground.

Gallery

Adorable tiger (vector tracing)	Flower waves (blur effect)
Function plot	Blendend logo (path flattening)
Color burn gradients

Licenses

• This project is released under the MIT License (see LICENSE).
• blend2d is licensed under the zlib license.
• priv/fonts/Alegreya-Regular.otf is distributed under the SIL Open Font License.
• The burn grid demo and flower waves (which are available in blendend_playground) is adapted from takawo's original p5.js sketch (https://openprocessing.org/user/6533) and shared under the Creative Commons BY-NC-SA 3.0 license (https://creativecommons.org/licenses/by-nc-sa/3.0/).