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# grex_framebuffer_extract
A plugin for the [Bevy](https://bevyengine.org) engine which allows for exporting framebuffer data from a camera.
Currently it only supports cameras which render to a render texture.
## Compatibility
| Crate Version | Bevy Version |
|--- |--- |
| 0.1 | 0.13 |
## Installation
### Using git URL in Cargo.toml
```toml
[dependencies.grex_framebuffer_extract]
git = "https://github.com/exvacuum/grex_framebuffer_extract.git"
```
## Usage
In `main.rs`:
```rs
use bevy::prelude::*;
use grex_framebuffer_extract;
fn main() {
App::new()
.add_plugins((
DefaultPlugins,
grex_framebuffer_extract::FramebufferExtractPlugin,
))
.run();
}
```
When spawning a camera:
```rs
let size = Extent3d {
width: 640,
height: 480,
depth_or_array_layers: 1,
};
let mut image = Image {
texture_descriptor: TextureDescriptor {
label: None,
size,
dimension: TextureDimension::D2,
format: TextureFormat::R8Unorm,
mip_level_count: 1,
sample_count: 1,
usage: TextureUsages::TEXTURE_BINDING
| TextureUsages::COPY_SRC
| TextureUsages::RENDER_ATTACHMENT,
view_formats: &[],
},
..default()
};
image.resize(size);
let image_handle = images.add(image); // ResMut<Assets<Image>>
commands.spawn((
Camera3dBundle {
camera: Camera {
target: image_handle.clone().into();
..Default::default()
},
..Default::default()
},
grex_framebuffer_extract::ExtractFramebufferBundle {
source: framebuffer_extract_sources.add(FramebufferExtractSource(image_handle.clone())), // ResMut<Assets<FramebufferExtractSource>>
destination: FramebufferExtractDestination::default(),
},
));
```
The FramebufferExtractDestination component will contain the extracted image which can be used or saved for whatever you need.
|
