Struct ChannelTexture 

pub struct ChannelTexture {
    pub texture: Option<Texture>,
    pub view: TextureView,
    pub sampler: Sampler,
    pub width: u32,
    pub height: u32,
}

A texture channel that can be bound to a custom shader

Fields

texture: Option<Texture>

The GPU texture (kept alive to ensure view/sampler remain valid) When using an external texture (e.g., background image), this is None

view: TextureView

View for binding to shaders

sampler: Sampler

Sampler for texture filtering

width: u32

Texture width in pixels

height: u32

Texture height in pixels

Implementations

impl ChannelTexture

pub fn placeholder(device: &Device, queue: &Queue) -> Self

Create a 1x1 transparent black placeholder texture

This is used when no texture is configured for a channel, ensuring the shader can still sample from it without errors.

pub fn from_view( view: TextureView, sampler: Sampler, width: u32, height: u32, ) -> Self

Create a ChannelTexture from an existing texture view and sampler.

This is used when sharing a texture from another source (e.g., background image) without creating a new copy. The caller is responsible for keeping the source texture alive while this ChannelTexture is in use.

Arguments

• view - The texture view to use
• sampler - The sampler for texture filtering
• width - Texture width in pixels
• height - Texture height in pixels

pub fn from_view_and_texture( view: TextureView, sampler: Sampler, width: u32, height: u32, texture: Texture, ) -> Self

Create a ChannelTexture from a view, sampler, and owned texture.

This is used when creating a new texture that should be kept alive by this ChannelTexture instance (e.g., solid color textures).

Arguments

• view - The texture view to use
• sampler - The sampler for texture filtering
• width - Texture width in pixels
• height - Texture height in pixels
• texture - The owned texture to keep alive

pub fn from_file(device: &Device, queue: &Queue, path: &Path) -> Result<Self>

Load a texture from an image file

Supports common image formats (PNG, JPEG, etc.) via the image crate.

Arguments

• device - The wgpu device
• queue - The wgpu queue
• path - Path to the image file

Returns

The loaded texture, or an error if loading fails

pub fn resolution(&self) -> [f32; 4]

Get the resolution as a vec4 [width, height, 1.0, 0.0]

This format matches Shadertoy’s iChannelResolution uniform.