Struct ShaderPass 

pub struct ShaderPass<S: SequoiShader> { /* private fields */ }

A configured shader draw that can be handed to a canvas or reused.

Inputs are optional: Painter samples transparent white for textures the pass does not bind. Self::primary_input binds the shader’s first declared texture, which is what most single-input effects need.

Implementations

impl<S: SequoiShader> ShaderPass<S>

pub fn new(shader: S) -> Self

pub fn at(self, rect: Rect) -> Self

Draws into rect. Without it the canvas bounds are used.

pub fn uv(self, uv: [f32; 4]) -> Self

Samples the shader inputs with an explicit UV window.

pub fn blend(self, blend: BlendMode) -> Self

Overrides the blend mode for this pass only.

pub fn input(self, name: &'static str, input: TexInput) -> Self

Binds input to the shader texture parameter name.

pub fn primary_input(self, input: TexInput) -> Self

Binds the first texture declared by the shader, unless already bound.

This removes the need to repeat the parameter name at every call site.

pub fn layers(self, first: TexInput, second: TexInput) -> Self

Binds the first two declared textures in order.

pub fn name(&self) -> &'static str

pub fn target_rect(&self) -> Option<Rect>

pub fn draw(&self, g: &mut Painter<'_, '_>) -> bool

where S: Copy,

Records the draw. Returns false when the shader is not registered on the runtime or the rectangle is empty.

Trait Implementations

impl<S: Clone + SequoiShader> Clone for ShaderPass<S>

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.