Module render_effect 

Render effects that can be applied to graphics layers.

Matches the Jetpack Compose RenderEffect API with extensions for custom WGSL shaders (RuntimeShader).

Structs

BlurredEdgeTreatment

Controls blur behavior outside source bounds.

DrawSpecialization

The pipeline specialization one draw of a RuntimeShader compiles, chosen by RuntimeShader::draw_specialization.

PlaceholderShape

A rounded rectangle within a layer.

RuntimeShader

A custom WGSL shader effect, analogous to Android’s RuntimeShader.

ShaderPlaceholder

What a renderer draws in place of a shader’s effect while the shader’s pipelines compile, so no frame waits for them.

ShaderWarmUp

A runtime shader to compile before its first draw, at the target it will draw to, so a renderer’s background compiler builds the pipeline at start instead of inside the frame that first needs it.

Enums

RenderEffect

A render effect applied to a graphics layer’s rendered content.

RuntimeShaderUniformError

Error returned when a shader uniform write targets renderer-owned storage.

ShaderTarget

Where a runtime shader’s pipeline draws, which decides how its output blends: Page composites the shader over what lies beneath (a backdrop effect, or a render effect the renderer draws straight onto the page), Layer renders into the layer’s own texture, whose content the shader replaces (a render effect under a blend mode or clip the page draw cannot apply, such as a DstOut mask).

SubstrateSpec

A low-frequency copy of a shader’s source the renderer packs beside it and hands the shader through a reserved substrate region slot.

TileMode

Edge treatment for blur effects at the boundary of the blurred region.

Constants

MAX_SUBSTRATES

The most substrates one shader may declare.

RUNTIME_SHADER_PRELUDE_WGSL

The vertex stage and bindings every runtime shader starts from: a quad whose uv spans the effect’s rect, the input texture and sampler at group 0, and the 64 uniform vectors at group 1, which both stages read. A shader source is this prelude followed by an effect_fs fragment stage.

Functions

runtime_shader_overrides_hash

The hash DrawSpecialization::overrides_hash gives a non-empty override set, its overrides in name order.

runtime_shader_source_hash

The hash RuntimeShader::source_hash gives a shader built from source.