Canvas_ity: A tiny, single-header <canvas>-like 2D rasterizer for C++

Canvas_ity is an impressive open-source C++ library designed for 2D rasterization, mimicking the popular JavaScript HTML <canvas> API. It distinguishes itself by being a single-header file, making it incredibly easy to integrate into C++ projects without complex build systems or external dependencies. The library provides a direct and efficient way to programmatically draw and manipulate graphical elements.

Key features and functionalities highlighted in the example include:

• Canvas Initialization: Users can create a canvas object with specified dimensions to serve as the drawing surface.
• Path Construction: Geometric shapes, like the star in the example, can be defined using move_to, line_to, and close_path methods, mirroring vector graphic path operations.
• Styling Options: Extensive styling is supported, including setting fill and stroke colors, line widths, line joins (e.g., rounded), line caps, and even dashed lines with custom segment patterns and offsets.
• Shadow Effects: Drop shadows can be applied to shapes by configuring blur, offset, and color properties.
• Gradients: The library allows for the creation and application of linear gradients to fill areas, enabling sophisticated visual effects.
• Composite Operations: Advanced rendering techniques like global_composite_operation (e.g., source_atop) are available for blending drawn elements.
• Image Data Export: After rendering, the pixel data can be extracted (e.g., as RGBA bytes) and saved to image file formats, such as TGA, demonstrating its utility for generating static images.

This library offers a compelling solution for C++ developers who need a straightforward, dependency-free 2D graphics engine, providing a flexible and powerful tool for a variety of applications from game development to custom rendering pipelines.