Struct UserWarpPipeline 

pub struct UserWarpPipeline {
    pipeline: RenderPipeline,
    bind_group: BindGroup,
    bind_group_layout: BindGroupLayout,
    pipeline_layout: PipelineLayout,
    uniforms_buffer: Buffer,
    sampler: Sampler,
    sampler_fw: Sampler,
    sampler_fc: Sampler,
    sampler_pw: Sampler,
    sampler_pc: Sampler,
    fallback_user_view: TextureView,
    user_texture_views: [TextureView; 8],
}

Pipeline + bind group + uniforms buffer for the user-authored warp fragment shader. Instantiated lazily by crate::WarpPipeline’s set_user_shader_with_plan; lives alongside the default warp path and replaces it at draw time when present.

Fields

pipeline: RenderPipeline

bind_group: BindGroup

bind_group_layout: BindGroupLayout

pipeline_layout: PipelineLayout

Kept alive only so the pipeline’s bind-group layout reference stays valid for the lifetime of pipeline; wgpu owns the underlying handle indirectly.

uniforms_buffer: Buffer

sampler: Sampler

sampler_main — linear / clamp-to-edge sampler bound at @binding(2).

sampler_fw: Sampler

The four MD2 sampler variants the codegen wrapper expects at @bindings 11..14. Created fresh here rather than borrowed from the comp pipeline so the warp pass is self-contained.

sampler_fc: Sampler

sampler_pw: Sampler

sampler_pc: Sampler

fallback_user_view: TextureView

1×1 white texture for unfilled user-texture slots. Sampled *X degrades to X, matching the comp pipeline’s fallback policy. Holds the texture alive (user_texture_views clones reference it for unfilled slots).

user_texture_views: [TextureView; 8]

One view per user-texture slot. Updated by install_user_textures on every shader swap.

Implementations

impl UserWarpPipeline

pub fn new( device: &Device, queue: &Queue, target_format: TextureFormat, wrapped_wgsl: &str, prev_view: &TextureView, aux: &WarpAuxViews<'_>, user_views: [Option<TextureView>; 8], ) -> Result<Self>

Compile + wrap is the caller’s responsibility. wrapped_wgsl must be the fully-formed module produced by onedrop-codegen::wrap_user_warp_shader_with_plan.

prev_view is bound everywhere the wrapper expects a “current frame” texture (binding 1, 3, 4, 5, 23). Real noise_* views from the GPU context’s crate::noise::NoisePack are bound at 6..10. The user_views array supplies any preset-loaded disk textures (slots set to None get the 1×1 white fallback).

pub fn update_uniforms(&self, queue: &Queue, uniforms: &ShaderUniforms)

Upload a fully-populated ShaderUniforms for this frame.

pub fn rebind_textures( &mut self, device: &Device, prev_view: &TextureView, aux: &WarpAuxViews<'_>, )

Rebuild the bind group with fresh texture views (resize, prev texture invalidation, etc.). aux follows the same convention as the comp pipeline’s rebind_input_texture path.

pub fn render( &self, encoder: &mut CommandEncoder, output_view: &TextureView, vertex_buffer: &Buffer, index_buffer: &Buffer, index_count: u32, )

Issue the warp pass with the user shader. Caller owns the encoder and the vertex/index buffers (shared with the default warp pipeline so the per-frame mesh upload is amortised).