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fast-fail in as_bind_group (#12513)

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# Objective

prevent gpu buffer allocations when running `as_bind_group` for assets
with texture dependencies that are not yet available.

## Solution

reorder the binding creation so that fallible items are created first.
This commit is contained in:
robtfm 2024-03-18 17:47:31 +00:00 committed by GitHub
parent 3549ae9e37
commit 26f2d3fb2f
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GPG key ID: B5690EEEBB952194
1 changed files with 6 additions and 3 deletions
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9
crates/bevy_render/macros/src/as_bind_group.rs
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@ -272,7 +272,8 @@ pub fn derive_as_bind_group(ast: syn::DeriveInput) -> Result<TokenStream> {
let fallback_image = get_fallback_image(&render_path, dimension);
binding_impls.push(quote! {
// insert fallible texture-based entries at 0 so that if we fail here, we exit before allocating any buffers
binding_impls.insert(0, quote! {
( #binding_index,
#render_path::render_resource::OwnedBindingResource::TextureView({
let handle: Option<&#asset_path::Handle<#render_path::texture::Image>> = (&self.#field_name).into();
@ -311,7 +312,8 @@ pub fn derive_as_bind_group(ast: syn::DeriveInput) -> Result<TokenStream> {
let fallback_image = get_fallback_image(&render_path, *dimension);
binding_impls.push(quote! {
// insert fallible texture-based entries at 0 so that if we fail here, we exit before allocating any buffers
binding_impls.insert(0, quote! {
(
#binding_index,
#render_path::render_resource::OwnedBindingResource::TextureView({
@ -353,7 +355,8 @@ pub fn derive_as_bind_group(ast: syn::DeriveInput) -> Result<TokenStream> {
let fallback_image = get_fallback_image(&render_path, *dimension);
binding_impls.push(quote! {
// insert fallible texture-based entries at 0 so that if we fail here, we exit before allocating any buffers
binding_impls.insert(0, quote! {
(
#binding_index,
#render_path::render_resource::OwnedBindingResource::Sampler({