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40c26f80aa
bevy/crates
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charlotte 40c26f80aa
Gpu readback (#15419) 
# Objective

Adds a new `Readback` component to request for readback of a
`Handle<Image>` or `Handle<ShaderStorageBuffer>` to the CPU in a future
frame.

## Solution

We track the `Readback` component and allocate a target buffer to write
the gpu resource into and map it back asynchronously, which then fires a
trigger on the entity in the main world. This proccess is asynchronous,
and generally takes a few frames.

## Showcase

```rust
let mut buffer = ShaderStorageBuffer::from(vec![0u32; 16]);
buffer.buffer_description.usage |= BufferUsages::COPY_SRC;
let buffer = buffers.add(buffer);

commands
    .spawn(Readback::buffer(buffer.clone()))
    .observe(|trigger: Trigger<ReadbackComplete>| {
        info!("Buffer data from previous frame {:?}", trigger.event());
    });
```

---------

Co-authored-by: Kristoffer Søholm <k.soeholm@gmail.com>
Co-authored-by: IceSentry <IceSentry@users.noreply.github.com>
2024-09-30 17:28:55 +00:00
..
bevy_a11y Add core and alloc over std Lints (#15281) 2024-09-27 00:59:59 +00:00
bevy_animation Simplify AnimatableProperty::Property trait bounds (#15495) 2024-09-28 15:04:00 +00:00
bevy_app Add core and alloc over std Lints (#15281) 2024-09-27 00:59:59 +00:00
bevy_asset Add core and alloc over std Lints (#15281) 2024-09-27 00:59:59 +00:00
bevy_audio Add core and alloc over std Lints (#15281) 2024-09-27 00:59:59 +00:00
bevy_color Add core and alloc over std Lints (#15281) 2024-09-27 00:59:59 +00:00
bevy_core Add core and alloc over std Lints (#15281) 2024-09-27 00:59:59 +00:00
bevy_core_pipeline Add core and alloc over std Lints (#15281) 2024-09-27 00:59:59 +00:00
bevy_derive Add core and alloc over std Lints (#15281) 2024-09-27 00:59:59 +00:00
bevy_dev_tools Add core and alloc over std Lints (#15281) 2024-09-27 00:59:59 +00:00
bevy_diagnostic Add core and alloc over std Lints (#15281) 2024-09-27 00:59:59 +00:00
bevy_dylib Generate links to definition in source code pages on docs.rs and dev-docs.bevyengine.org (#12965) 2024-07-29 23:10:16 +00:00
bevy_ecs Small addition to World::flush_commands explaining how spawn will cause it to panic. (#15411) 2024-09-30 17:23:52 +00:00
bevy_encase_derive Update `glam to 0.29, encase` to 0.10. (#15249) 2024-09-23 19:44:02 +00:00
bevy_gilrs Implement gamepads as entities (#12770) 2024-09-27 20:07:20 +00:00
bevy_gizmos Add core and alloc over std Lints (#15281) 2024-09-27 00:59:59 +00:00
bevy_gltf feat(gltf): add name component to gltf mesh primitive (#13912) 2024-09-30 16:51:52 +00:00
bevy_hierarchy Add core and alloc over std Lints (#15281) 2024-09-27 00:59:59 +00:00
bevy_input Implement gamepads as entities (#12770) 2024-09-27 20:07:20 +00:00
bevy_internal Split TextureAtlasSources out of TextureAtlasLayout and make TextureAtlasLayout serializable (#15344) 2024-09-30 17:11:56 +00:00
bevy_log Add core and alloc over std Lints (#15281) 2024-09-27 00:59:59 +00:00
bevy_macro_utils Modify derive_label to support no_std environments (#15465) 2024-09-27 20:23:26 +00:00
bevy_math add more Curve adaptors (#14794) 2024-09-30 16:55:32 +00:00
bevy_mikktspace Add core and alloc over std Lints (#15281) 2024-09-27 00:59:59 +00:00
bevy_pbr Implement volumetric fog support for both point lights and spotlights (#15361) 2024-09-29 21:30:53 +00:00
bevy_picking Add core and alloc over std Lints (#15281) 2024-09-27 00:59:59 +00:00
bevy_ptr Add core and alloc over std Lints (#15281) 2024-09-27 00:59:59 +00:00
bevy_reflect Make drain take a mutable borrow instead of Box<Self> for reflected Map, List, and Set. (#15406) 2024-09-30 17:19:13 +00:00
bevy_remote Refactor BRP to allow for 3rd-party transports (#15438) 2024-09-27 20:09:46 +00:00
bevy_render Gpu readback (#15419) 2024-09-30 17:28:55 +00:00
bevy_scene System param validation for observers, system registry and run once (#15526) 2024-09-30 01:00:39 +00:00
bevy_sprite Split TextureAtlasSources out of TextureAtlasLayout and make TextureAtlasLayout serializable (#15344) 2024-09-30 17:11:56 +00:00
bevy_state Add core and alloc over std Lints (#15281) 2024-09-27 00:59:59 +00:00
bevy_tasks bump async-channel to 2.3.0 (#15497) 2024-09-28 19:21:59 +00:00
bevy_text Make CosmicFontSystem and SwashCache pub resources. (#15479) 2024-09-28 00:00:27 +00:00
bevy_time Add core and alloc over std Lints (#15281) 2024-09-27 00:59:59 +00:00
bevy_transform Migrate visibility to required components (#15474) 2024-09-27 19:06:16 +00:00
bevy_ui System param validation for observers, system registry and run once (#15526) 2024-09-30 01:00:39 +00:00
bevy_utils Add core and alloc over std Lints (#15281) 2024-09-27 00:59:59 +00:00
bevy_window Add core and alloc over std Lints (#15281) 2024-09-27 00:59:59 +00:00
bevy_winit Add core and alloc over std Lints (#15281) 2024-09-27 00:59:59 +00:00