Struct Backbuffer 

pub struct Backbuffer { /* private fields */ }

Manages a chain of backbuffers for rendering

This is essential for:

• Glass effects that need to sample the backdrop
• WASM targets where we can’t read from the swapchain
• Post-processing pipelines

Implementations

impl Backbuffer

pub fn new( device: &Device, width: u32, height: u32, config: BackbufferConfig, ) -> Self

Create a new backbuffer chain

pub fn resize(&mut self, device: &Device, width: u32, height: u32)

Resize the backbuffers

pub fn write_target(&self) -> &TextureView

Get the current write target (where we render to)

pub fn read_target(&self) -> &TextureView

Get the current read target (previous frame, for glass effects)

pub fn depth_target(&self) -> Option<&TextureView>

Get the depth buffer view (if enabled)

pub fn sampler(&self) -> &Sampler

Get the sampler for reading backbuffers

pub fn format(&self) -> TextureFormat

Get the texture format

pub fn dimensions(&self) -> (u32, u32)

Get the current dimensions

pub fn swap(&mut self)

Swap buffers - call after rendering a frame

This advances the write/read indices for the next frame

pub fn copy_to_surface( &self, encoder: &mut CommandEncoder, surface_texture: &Texture, )

Copy the current write buffer to the swapchain

This is used to present the final rendered frame to the screen. Essential for WASM where we render to a backbuffer first.

pub fn write_texture(&self) -> &Texture

Get the write buffer texture (for advanced use cases)

pub fn read_texture(&self) -> &Texture

Get the read buffer texture (for advanced use cases)