Ruby-libgd Native 2D graphics engine for Ruby (no CLI, no JavaScript)
Briefly

"Hello friends of Ruby, I built ruby-libgd, a native Ruby binding to the libgd graphics library. The goal is to provide a lightweight, in-process 2D graphics engine for Ruby not an image manipulation wrapper, but a canvas-based drawing API with deterministic rendering. Unlike tools like MiniMagick (which wrap ImageMagick CLI), ruby-libgd runs entirely in-process and exposes explicit drawing primitives: lines, shapes, text, fonts, colors, and pixel-level control."
"Simple example: ```ruby img = GD::Image.new(400, 300) white = GD::Color.rgb(255, 255, 255) black = GD::Color.rgb(0, 0, 0) img.rectangle(20, 20, 200, 150, black) img.text(Hello Ruby, x: 30, y: 40, color: black) img.save(output.png) ```"
ruby-libgd is a native Ruby binding to the libgd graphics library. The project provides a lightweight, in-process 2D graphics engine for Ruby, offering deterministic, canvas-style rendering rather than image-manipulation wrappers. The API exposes explicit drawing primitives including lines, shapes, text, font handling, color creation, and pixel-level control. The binding runs entirely in-process, avoiding external CLI wrappers like ImageMagick used by tools such as MiniMagick. Common operations include creating an image surface, defining colors, drawing shapes and text at specified coordinates, and saving output images to disk. The design emphasizes simplicity, performance, and predictable rendering behavior.
Read at rubyflow.com
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