Crate cvkg_render_software 

CVKG Software Renderer

CPU fallback renderer for environments without GPU/WebGPU access (CI servers, headless testing, embedded systems). Implements the Renderer trait with pure-software rasterization into an RGBA pixel buffer.

Capabilities

• Opaque rectangles (trivial)
• Rounded rectangles (analytical AA via signed distance)
• Ellipses (analytical AA)
• Stroked shapes (rect, rounded rect, ellipse)
• Lines (Bresenham with AA)
• Basic text (via cvkg-runic-text, bitmap glyph blitting)
• Linear gradients (horizontal only)
• Solid glass fallback (tint only, no refraction)

Limitations

• No glass refraction/software ray-tracing (degrades to solid tint)
• No SVG path rendering
• No texture sampling
• No 3D (all 3D methods are no-ops)
• No MSAA (uses 4x supersampling for rounded shapes/ellipses)

Structs

Framebuffer

RGBA8 pixel buffer with depth buffer for basic overlap testing.

SoftwareRenderer

CPU rasterizer implementing the Renderer trait.