Module filter 

Filter trait + built-in filters.

Filters operate on RenderTextures. Each filter declares how many passes it needs; the orchestrator on Renderer::apply_filter allocates a scratch RenderTexture when needed and ping-pongs.

Built-ins:

• blur::BlurFilter — separable Gaussian (M0.16)
• drop_shadow::DropShadowFilter — alpha extract + blur + composite (M0.17)
• motion_blur::MotionBlurFilter — velocity-driven directional blur (M0.18)
• color_matrix::ColorMatrixFilter — 4×5 RGBA matrix (M0.18)

Re-exports

pub use blur::BlurFilter;

pub use color_matrix::ColorMatrixFilter;

pub use drop_shadow::DropShadowFilter;

pub use motion_blur::MotionBlurFilter;

Modules

blur

BlurFilter — two-pass separable Gaussian blur.

color_matrix

ColorMatrixFilter — 4×5 RGBA matrix multiplication.

drop_shadow

DropShadowFilter — alpha extract → blur → composite under source.

motion_blur

MotionBlurFilter — directional Gaussian blur driven by a velocity vector.

Structs

FilterContext

Per-filter render context — provides the wgpu device / queue / encoder needed to enqueue draw work for a filter pass.

Traits

Filter

A renderable post-process filter applied to a RenderTexture.