Struct bevy::render::texture::Image

pub struct Image {
    pub data: Vec<u8>,
    pub texture_descriptor: TextureDescriptor<Option<&'static str>, &'static [TextureFormat]>,
    pub sampler: ImageSampler,
    pub texture_view_descriptor: Option<TextureViewDescriptor<'static>>,
    pub asset_usage: RenderAssetUsages,
}

Fields§

§data: Vec<u8>§texture_descriptor: TextureDescriptor<Option<&'static str>, &'static [TextureFormat]>§sampler: ImageSampler

The ImageSampler to use during rendering.

§texture_view_descriptor: Option<TextureViewDescriptor<'static>>§asset_usage: RenderAssetUsages

Implementations§

§

impl Image

pub fn new( size: Extent3d, dimension: TextureDimension, data: Vec<u8>, format: TextureFormat, asset_usage: RenderAssetUsages ) -> Image

Creates a new image from raw binary data and the corresponding metadata.

§Panics

Panics if the length of the data, volume of the size and the size of the format do not match.

pub fn new_fill( size: Extent3d, dimension: TextureDimension, pixel: &[u8], format: TextureFormat, asset_usage: RenderAssetUsages ) -> Image

Creates a new image from raw binary data and the corresponding metadata, by filling the image data with the pixel data repeated multiple times.

§Panics

Panics if the size of the format is not a multiple of the length of the pixel data.

Examples found in repository?
examples/3d/3d_shapes.rs (lines 118-128)
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fn uv_debug_texture() -> Image {
    const TEXTURE_SIZE: usize = 8;

    let mut palette: [u8; 32] = [
        255, 102, 159, 255, 255, 159, 102, 255, 236, 255, 102, 255, 121, 255, 102, 255, 102, 255,
        198, 255, 102, 198, 255, 255, 121, 102, 255, 255, 236, 102, 255, 255,
    ];

    let mut texture_data = [0; TEXTURE_SIZE * TEXTURE_SIZE * 4];
    for y in 0..TEXTURE_SIZE {
        let offset = TEXTURE_SIZE * y * 4;
        texture_data[offset..(offset + TEXTURE_SIZE * 4)].copy_from_slice(&palette);
        palette.rotate_right(4);
    }

    Image::new_fill(
        Extent3d {
            width: TEXTURE_SIZE as u32,
            height: TEXTURE_SIZE as u32,
            depth_or_array_layers: 1,
        },
        TextureDimension::D2,
        &texture_data,
        TextureFormat::Rgba8UnormSrgb,
        RenderAssetUsages::RENDER_WORLD,
    )
}
More examples
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examples/stress_tests/bevymark.rs (lines 550-560)
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fn init_textures(textures: &mut Vec<Handle<Image>>, args: &Args, images: &mut Assets<Image>) {
    // We're seeding the PRNG here to make this example deterministic for testing purposes.
    // This isn't strictly required in practical use unless you need your app to be deterministic.
    let mut color_rng = ChaCha8Rng::seed_from_u64(42);
    while textures.len() < args.material_texture_count {
        let pixel = [color_rng.gen(), color_rng.gen(), color_rng.gen(), 255];
        textures.push(images.add(Image::new_fill(
            Extent3d {
                width: BIRD_TEXTURE_SIZE as u32,
                height: BIRD_TEXTURE_SIZE as u32,
                depth_or_array_layers: 1,
            },
            TextureDimension::D2,
            &pixel,
            TextureFormat::Rgba8UnormSrgb,
            RenderAssetUsages::RENDER_WORLD,
        )));
    }
}
examples/stress_tests/many_cubes.rs (lines 282-292)
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fn init_textures(args: &Args, images: &mut Assets<Image>) -> Vec<Handle<Image>> {
    // We're seeding the PRNG here to make this example deterministic for testing purposes.
    // This isn't strictly required in practical use unless you need your app to be deterministic.
    let mut color_rng = ChaCha8Rng::seed_from_u64(42);
    let color_bytes: Vec<u8> = (0..(args.material_texture_count * 4))
        .map(|i| if (i % 4) == 3 { 255 } else { color_rng.gen() })
        .collect();
    color_bytes
        .chunks(4)
        .map(|pixel| {
            images.add(Image::new_fill(
                Extent3d {
                    width: 1,
                    height: 1,
                    depth_or_array_layers: 1,
                },
                TextureDimension::D2,
                pixel,
                TextureFormat::Rgba8UnormSrgb,
                RenderAssetUsages::RENDER_WORLD,
            ))
        })
        .collect()
}
examples/3d/anti_aliasing.rs (lines 378-388)
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fn uv_debug_texture() -> Image {
    const TEXTURE_SIZE: usize = 8;

    let mut palette: [u8; 32] = [
        255, 102, 159, 255, 255, 159, 102, 255, 236, 255, 102, 255, 121, 255, 102, 255, 102, 255,
        198, 255, 102, 198, 255, 255, 121, 102, 255, 255, 236, 102, 255, 255,
    ];

    let mut texture_data = [0; TEXTURE_SIZE * TEXTURE_SIZE * 4];
    for y in 0..TEXTURE_SIZE {
        let offset = TEXTURE_SIZE * y * 4;
        texture_data[offset..(offset + TEXTURE_SIZE * 4)].copy_from_slice(&palette);
        palette.rotate_right(4);
    }

    let mut img = Image::new_fill(
        Extent3d {
            width: TEXTURE_SIZE as u32,
            height: TEXTURE_SIZE as u32,
            depth_or_array_layers: 1,
        },
        TextureDimension::D2,
        &texture_data,
        TextureFormat::Rgba8UnormSrgb,
        RenderAssetUsages::RENDER_WORLD,
    );
    img.sampler = ImageSampler::Descriptor(ImageSamplerDescriptor::default());
    img
}
examples/shader/compute_shader_game_of_life.rs (lines 51-61)
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fn setup(mut commands: Commands, mut images: ResMut<Assets<Image>>) {
    let mut image = Image::new_fill(
        Extent3d {
            width: SIZE.0,
            height: SIZE.1,
            depth_or_array_layers: 1,
        },
        TextureDimension::D2,
        &[0, 0, 0, 255],
        TextureFormat::R32Float,
        RenderAssetUsages::RENDER_WORLD,
    );
    image.texture_descriptor.usage =
        TextureUsages::COPY_DST | TextureUsages::STORAGE_BINDING | TextureUsages::TEXTURE_BINDING;
    let image0 = images.add(image.clone());
    let image1 = images.add(image);

    commands.spawn(SpriteBundle {
        sprite: Sprite {
            custom_size: Some(Vec2::new(SIZE.0 as f32, SIZE.1 as f32)),
            ..default()
        },
        texture: image0.clone(),
        transform: Transform::from_scale(Vec3::splat(DISPLAY_FACTOR as f32)),
        ..default()
    });
    commands.spawn(Camera2dBundle::default());

    commands.insert_resource(GameOfLifeImages {
        texture_a: image0,
        texture_b: image1,
    });
}
examples/3d/motion_blur.rs (lines 391-401)
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fn uv_debug_texture() -> Image {
    use bevy::render::{render_asset::RenderAssetUsages, render_resource::*, texture::*};
    const TEXTURE_SIZE: usize = 7;

    let mut palette = [
        164, 164, 164, 255, 168, 168, 168, 255, 153, 153, 153, 255, 139, 139, 139, 255, 153, 153,
        153, 255, 177, 177, 177, 255, 159, 159, 159, 255,
    ];

    let mut texture_data = [0; TEXTURE_SIZE * TEXTURE_SIZE * 4];
    for y in 0..TEXTURE_SIZE {
        let offset = TEXTURE_SIZE * y * 4;
        texture_data[offset..(offset + TEXTURE_SIZE * 4)].copy_from_slice(&palette);
        palette.rotate_right(12);
    }

    let mut img = Image::new_fill(
        Extent3d {
            width: TEXTURE_SIZE as u32,
            height: TEXTURE_SIZE as u32,
            depth_or_array_layers: 1,
        },
        TextureDimension::D2,
        &texture_data,
        TextureFormat::Rgba8UnormSrgb,
        RenderAssetUsages::RENDER_WORLD,
    );
    img.sampler = ImageSampler::Descriptor(ImageSamplerDescriptor {
        address_mode_u: ImageAddressMode::Repeat,
        address_mode_v: ImageAddressMode::MirrorRepeat,
        mag_filter: ImageFilterMode::Nearest,
        ..ImageSamplerDescriptor::linear()
    });
    img
}

pub fn width(&self) -> u32

Returns the width of a 2D image.

Examples found in repository?
examples/3d/skybox.rs (line 155)
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fn asset_loaded(
    asset_server: Res<AssetServer>,
    mut images: ResMut<Assets<Image>>,
    mut cubemap: ResMut<Cubemap>,
    mut skyboxes: Query<&mut Skybox>,
) {
    if !cubemap.is_loaded && asset_server.load_state(&cubemap.image_handle) == LoadState::Loaded {
        info!("Swapping to {}...", CUBEMAPS[cubemap.index].0);
        let image = images.get_mut(&cubemap.image_handle).unwrap();
        // NOTE: PNGs do not have any metadata that could indicate they contain a cubemap texture,
        // so they appear as one texture. The following code reconfigures the texture as necessary.
        if image.texture_descriptor.array_layer_count() == 1 {
            image.reinterpret_stacked_2d_as_array(image.height() / image.width());
            image.texture_view_descriptor = Some(TextureViewDescriptor {
                dimension: Some(TextureViewDimension::Cube),
                ..default()
            });
        }

        for mut skybox in &mut skyboxes {
            skybox.image = cubemap.image_handle.clone();
        }

        cubemap.is_loaded = true;
    }
}
More examples
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examples/app/headless_renderer.rs (line 502)
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fn update(
    images_to_save: Query<&ImageToSave>,
    receiver: Res<MainWorldReceiver>,
    mut images: ResMut<Assets<Image>>,
    mut scene_controller: ResMut<SceneController>,
    mut app_exit_writer: EventWriter<AppExit>,
    mut file_number: Local<u32>,
) {
    if let SceneState::Render(n) = scene_controller.state {
        if n < 1 {
            // We don't want to block the main world on this,
            // so we use try_recv which attempts to receive without blocking
            let mut image_data = Vec::new();
            while let Ok(data) = receiver.try_recv() {
                // image generation could be faster than saving to fs,
                // that's why use only last of them
                image_data = data;
            }
            if !image_data.is_empty() {
                for image in images_to_save.iter() {
                    // Fill correct data from channel to image
                    let img_bytes = images.get_mut(image.id()).unwrap();

                    // We need to ensure that this works regardless of the image dimensions
                    // If the image became wider when copying from the texture to the buffer,
                    // then the data is reduced to its original size when copying from the buffer to the image.
                    let row_bytes = img_bytes.width() as usize
                        * img_bytes.texture_descriptor.format.pixel_size();
                    let aligned_row_bytes = RenderDevice::align_copy_bytes_per_row(row_bytes);
                    if row_bytes == aligned_row_bytes {
                        img_bytes.data.clone_from(&image_data);
                    } else {
                        // shrink data to original image size
                        img_bytes.data = image_data
                            .chunks(aligned_row_bytes)
                            .take(img_bytes.height() as usize)
                            .flat_map(|row| &row[..row_bytes.min(row.len())])
                            .cloned()
                            .collect();
                    }

                    // Create RGBA Image Buffer
                    let img = match img_bytes.clone().try_into_dynamic() {
                        Ok(img) => img.to_rgba8(),
                        Err(e) => panic!("Failed to create image buffer {e:?}"),
                    };

                    // Prepare directory for images, test_images in bevy folder is used here for example
                    // You should choose the path depending on your needs
                    let images_dir = PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("test_images");
                    info!("Saving image to: {images_dir:?}");
                    std::fs::create_dir_all(&images_dir).unwrap();

                    // Choose filename starting from 000.png
                    let image_path = images_dir.join(format!("{:03}.png", file_number.deref()));
                    *file_number.deref_mut() += 1;

                    // Finally saving image to file, this heavy blocking operation is kept here
                    // for example simplicity, but in real app you should move it to a separate task
                    if let Err(e) = img.save(image_path) {
                        panic!("Failed to save image: {}", e);
                    };
                }
                if scene_controller.single_image {
                    app_exit_writer.send(AppExit::Success);
                }
            }
        } else {
            // clears channel for skipped frames
            while receiver.try_recv().is_ok() {}
            scene_controller.state = SceneState::Render(n - 1);
        }
    }
}

pub fn height(&self) -> u32

Returns the height of a 2D image.

Examples found in repository?
examples/3d/skybox.rs (line 155)
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fn asset_loaded(
    asset_server: Res<AssetServer>,
    mut images: ResMut<Assets<Image>>,
    mut cubemap: ResMut<Cubemap>,
    mut skyboxes: Query<&mut Skybox>,
) {
    if !cubemap.is_loaded && asset_server.load_state(&cubemap.image_handle) == LoadState::Loaded {
        info!("Swapping to {}...", CUBEMAPS[cubemap.index].0);
        let image = images.get_mut(&cubemap.image_handle).unwrap();
        // NOTE: PNGs do not have any metadata that could indicate they contain a cubemap texture,
        // so they appear as one texture. The following code reconfigures the texture as necessary.
        if image.texture_descriptor.array_layer_count() == 1 {
            image.reinterpret_stacked_2d_as_array(image.height() / image.width());
            image.texture_view_descriptor = Some(TextureViewDescriptor {
                dimension: Some(TextureViewDimension::Cube),
                ..default()
            });
        }

        for mut skybox in &mut skyboxes {
            skybox.image = cubemap.image_handle.clone();
        }

        cubemap.is_loaded = true;
    }
}
More examples
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examples/app/headless_renderer.rs (line 511)
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fn update(
    images_to_save: Query<&ImageToSave>,
    receiver: Res<MainWorldReceiver>,
    mut images: ResMut<Assets<Image>>,
    mut scene_controller: ResMut<SceneController>,
    mut app_exit_writer: EventWriter<AppExit>,
    mut file_number: Local<u32>,
) {
    if let SceneState::Render(n) = scene_controller.state {
        if n < 1 {
            // We don't want to block the main world on this,
            // so we use try_recv which attempts to receive without blocking
            let mut image_data = Vec::new();
            while let Ok(data) = receiver.try_recv() {
                // image generation could be faster than saving to fs,
                // that's why use only last of them
                image_data = data;
            }
            if !image_data.is_empty() {
                for image in images_to_save.iter() {
                    // Fill correct data from channel to image
                    let img_bytes = images.get_mut(image.id()).unwrap();

                    // We need to ensure that this works regardless of the image dimensions
                    // If the image became wider when copying from the texture to the buffer,
                    // then the data is reduced to its original size when copying from the buffer to the image.
                    let row_bytes = img_bytes.width() as usize
                        * img_bytes.texture_descriptor.format.pixel_size();
                    let aligned_row_bytes = RenderDevice::align_copy_bytes_per_row(row_bytes);
                    if row_bytes == aligned_row_bytes {
                        img_bytes.data.clone_from(&image_data);
                    } else {
                        // shrink data to original image size
                        img_bytes.data = image_data
                            .chunks(aligned_row_bytes)
                            .take(img_bytes.height() as usize)
                            .flat_map(|row| &row[..row_bytes.min(row.len())])
                            .cloned()
                            .collect();
                    }

                    // Create RGBA Image Buffer
                    let img = match img_bytes.clone().try_into_dynamic() {
                        Ok(img) => img.to_rgba8(),
                        Err(e) => panic!("Failed to create image buffer {e:?}"),
                    };

                    // Prepare directory for images, test_images in bevy folder is used here for example
                    // You should choose the path depending on your needs
                    let images_dir = PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("test_images");
                    info!("Saving image to: {images_dir:?}");
                    std::fs::create_dir_all(&images_dir).unwrap();

                    // Choose filename starting from 000.png
                    let image_path = images_dir.join(format!("{:03}.png", file_number.deref()));
                    *file_number.deref_mut() += 1;

                    // Finally saving image to file, this heavy blocking operation is kept here
                    // for example simplicity, but in real app you should move it to a separate task
                    if let Err(e) = img.save(image_path) {
                        panic!("Failed to save image: {}", e);
                    };
                }
                if scene_controller.single_image {
                    app_exit_writer.send(AppExit::Success);
                }
            }
        } else {
            // clears channel for skipped frames
            while receiver.try_recv().is_ok() {}
            scene_controller.state = SceneState::Render(n - 1);
        }
    }
}

pub fn aspect_ratio(&self) -> AspectRatio

Returns the aspect ratio (width / height) of a 2D image.

pub fn size_f32(&self) -> Vec2

Returns the size of a 2D image as f32.

Examples found in repository?
examples/3d/tonemapping.rs (line 273)
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fn resize_image(
    image_mesh: Query<(&Handle<StandardMaterial>, &Handle<Mesh>), With<HDRViewer>>,
    materials: Res<Assets<StandardMaterial>>,
    mut meshes: ResMut<Assets<Mesh>>,
    images: Res<Assets<Image>>,
    mut image_events: EventReader<AssetEvent<Image>>,
) {
    for event in image_events.read() {
        let (AssetEvent::Added { id } | AssetEvent::Modified { id }) = event else {
            continue;
        };

        for (mat_h, mesh_h) in &image_mesh {
            let Some(mat) = materials.get(mat_h) else {
                continue;
            };

            let Some(ref base_color_texture) = mat.base_color_texture else {
                continue;
            };

            if *id != base_color_texture.id() {
                continue;
            };

            let Some(image_changed) = images.get(*id) else {
                continue;
            };

            let size = image_changed.size_f32().normalize_or_zero() * 1.4;
            // Resize Mesh
            let quad = Mesh::from(Rectangle::from_size(size));
            meshes.insert(mesh_h, quad);
        }
    }
}

pub fn size(&self) -> UVec2

Returns the size of a 2D image.

pub fn resize(&mut self, size: Extent3d)

Resizes the image to the new size, by removing information or appending 0 to the data. Does not properly resize the contents of the image, but only its internal data buffer.

Examples found in repository?
examples/2d/pixel_grid_snap.rs (line 121)
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fn setup_camera(mut commands: Commands, mut images: ResMut<Assets<Image>>) {
    let canvas_size = Extent3d {
        width: RES_WIDTH,
        height: RES_HEIGHT,
        ..default()
    };

    // this Image serves as a canvas representing the low-resolution game screen
    let mut canvas = Image {
        texture_descriptor: TextureDescriptor {
            label: None,
            size: canvas_size,
            dimension: TextureDimension::D2,
            format: TextureFormat::Bgra8UnormSrgb,
            mip_level_count: 1,
            sample_count: 1,
            usage: TextureUsages::TEXTURE_BINDING
                | TextureUsages::COPY_DST
                | TextureUsages::RENDER_ATTACHMENT,
            view_formats: &[],
        },
        ..default()
    };

    // fill image.data with zeroes
    canvas.resize(canvas_size);

    let image_handle = images.add(canvas);

    // this camera renders whatever is on `PIXEL_PERFECT_LAYERS` to the canvas
    commands.spawn((
        Camera2dBundle {
            camera: Camera {
                // render before the "main pass" camera
                order: -1,
                target: RenderTarget::Image(image_handle.clone()),
                ..default()
            },
            ..default()
        },
        InGameCamera,
        PIXEL_PERFECT_LAYERS,
    ));

    // spawn the canvas
    commands.spawn((
        SpriteBundle {
            texture: image_handle,
            ..default()
        },
        Canvas,
        HIGH_RES_LAYERS,
    ));

    // the "outer" camera renders whatever is on `HIGH_RES_LAYERS` to the screen.
    // here, the canvas and one of the sample sprites will be rendered by this camera
    commands.spawn((Camera2dBundle::default(), OuterCamera, HIGH_RES_LAYERS));
}
More examples
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examples/ui/render_ui_to_texture.rs (line 58)
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fn setup(
    mut commands: Commands,
    mut meshes: ResMut<Assets<Mesh>>,
    mut materials: ResMut<Assets<StandardMaterial>>,
    mut images: ResMut<Assets<Image>>,
) {
    let size = Extent3d {
        width: 512,
        height: 512,
        ..default()
    };

    // This is the texture that will be rendered to.
    let mut image = Image {
        texture_descriptor: TextureDescriptor {
            label: None,
            size,
            dimension: TextureDimension::D2,
            format: TextureFormat::Bgra8UnormSrgb,
            mip_level_count: 1,
            sample_count: 1,
            usage: TextureUsages::TEXTURE_BINDING
                | TextureUsages::COPY_DST
                | TextureUsages::RENDER_ATTACHMENT,
            view_formats: &[],
        },
        ..default()
    };

    // fill image.data with zeroes
    image.resize(size);

    let image_handle = images.add(image);

    // Light
    commands.spawn(DirectionalLightBundle::default());

    let texture_camera = commands
        .spawn(Camera2dBundle {
            camera: Camera {
                // render before the "main pass" camera
                order: -1,
                target: RenderTarget::Image(image_handle.clone()),
                ..default()
            },
            ..default()
        })
        .id();

    commands
        .spawn((
            NodeBundle {
                style: Style {
                    // Cover the whole image
                    width: Val::Percent(100.),
                    height: Val::Percent(100.),
                    flex_direction: FlexDirection::Column,
                    justify_content: JustifyContent::Center,
                    align_items: AlignItems::Center,
                    ..default()
                },
                background_color: GOLD.into(),
                ..default()
            },
            TargetCamera(texture_camera),
        ))
        .with_children(|parent| {
            parent.spawn(TextBundle::from_section(
                "This is a cube",
                TextStyle {
                    font_size: 40.0,
                    color: Color::BLACK,
                    ..default()
                },
            ));
        });

    let cube_size = 4.0;
    let cube_handle = meshes.add(Cuboid::new(cube_size, cube_size, cube_size));

    // This material has the texture that has been rendered.
    let material_handle = materials.add(StandardMaterial {
        base_color_texture: Some(image_handle),
        reflectance: 0.02,
        unlit: false,

        ..default()
    });

    // Cube with material containing the rendered UI texture.
    commands.spawn((
        PbrBundle {
            mesh: cube_handle,
            material: material_handle,
            transform: Transform::from_xyz(0.0, 0.0, 1.5)
                .with_rotation(Quat::from_rotation_x(-PI / 5.0)),
            ..default()
        },
        Cube,
    ));

    // The main pass camera.
    commands.spawn(Camera3dBundle {
        transform: Transform::from_xyz(0.0, 0.0, 15.0).looking_at(Vec3::ZERO, Vec3::Y),
        ..default()
    });
}
examples/3d/render_to_texture.rs (line 61)
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fn setup(
    mut commands: Commands,
    mut meshes: ResMut<Assets<Mesh>>,
    mut materials: ResMut<Assets<StandardMaterial>>,
    mut images: ResMut<Assets<Image>>,
) {
    let size = Extent3d {
        width: 512,
        height: 512,
        ..default()
    };

    // This is the texture that will be rendered to.
    let mut image = Image {
        texture_descriptor: TextureDescriptor {
            label: None,
            size,
            dimension: TextureDimension::D2,
            format: TextureFormat::Bgra8UnormSrgb,
            mip_level_count: 1,
            sample_count: 1,
            usage: TextureUsages::TEXTURE_BINDING
                | TextureUsages::COPY_DST
                | TextureUsages::RENDER_ATTACHMENT,
            view_formats: &[],
        },
        ..default()
    };

    // fill image.data with zeroes
    image.resize(size);

    let image_handle = images.add(image);

    let cube_handle = meshes.add(Cuboid::new(4.0, 4.0, 4.0));
    let cube_material_handle = materials.add(StandardMaterial {
        base_color: Color::srgb(0.8, 0.7, 0.6),
        reflectance: 0.02,
        unlit: false,
        ..default()
    });

    // This specifies the layer used for the first pass, which will be attached to the first pass camera and cube.
    let first_pass_layer = RenderLayers::layer(1);

    // The cube that will be rendered to the texture.
    commands.spawn((
        PbrBundle {
            mesh: cube_handle,
            material: cube_material_handle,
            transform: Transform::from_translation(Vec3::new(0.0, 0.0, 1.0)),
            ..default()
        },
        FirstPassCube,
        first_pass_layer.clone(),
    ));

    // Light
    // NOTE: we add the light to both layers so it affects both the rendered-to-texture cube, and the cube on which we display the texture
    // Setting the layer to RenderLayers::layer(0) would cause the main view to be lit, but the rendered-to-texture cube to be unlit.
    // Setting the layer to RenderLayers::layer(1) would cause the rendered-to-texture cube to be lit, but the main view to be unlit.
    commands.spawn((
        PointLightBundle {
            transform: Transform::from_translation(Vec3::new(0.0, 0.0, 10.0)),
            ..default()
        },
        RenderLayers::layer(0).with(1),
    ));

    commands.spawn((
        Camera3dBundle {
            camera: Camera {
                // render before the "main pass" camera
                order: -1,
                target: image_handle.clone().into(),
                clear_color: Color::WHITE.into(),
                ..default()
            },
            transform: Transform::from_translation(Vec3::new(0.0, 0.0, 15.0))
                .looking_at(Vec3::ZERO, Vec3::Y),
            ..default()
        },
        first_pass_layer,
    ));

    let cube_size = 4.0;
    let cube_handle = meshes.add(Cuboid::new(cube_size, cube_size, cube_size));

    // This material has the texture that has been rendered.
    let material_handle = materials.add(StandardMaterial {
        base_color_texture: Some(image_handle),
        reflectance: 0.02,
        unlit: false,
        ..default()
    });

    // Main pass cube, with material containing the rendered first pass texture.
    commands.spawn((
        PbrBundle {
            mesh: cube_handle,
            material: material_handle,
            transform: Transform::from_xyz(0.0, 0.0, 1.5)
                .with_rotation(Quat::from_rotation_x(-PI / 5.0)),
            ..default()
        },
        MainPassCube,
    ));

    // The main pass camera.
    commands.spawn(Camera3dBundle {
        transform: Transform::from_xyz(0.0, 0.0, 15.0).looking_at(Vec3::ZERO, Vec3::Y),
        ..default()
    });
}

pub fn reinterpret_size(&mut self, new_size: Extent3d)

Changes the size, asserting that the total number of data elements (pixels) remains the same.

§Panics

Panics if the new_size does not have the same volume as to old one.

pub fn reinterpret_stacked_2d_as_array(&mut self, layers: u32)

Takes a 2D image containing vertically stacked images of the same size, and reinterprets it as a 2D array texture, where each of the stacked images becomes one layer of the array. This is primarily for use with the texture2DArray shader uniform type.

§Panics

Panics if the texture is not 2D, has more than one layers or is not evenly dividable into the layers.

Examples found in repository?
examples/3d/skybox.rs (line 155)
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fn asset_loaded(
    asset_server: Res<AssetServer>,
    mut images: ResMut<Assets<Image>>,
    mut cubemap: ResMut<Cubemap>,
    mut skyboxes: Query<&mut Skybox>,
) {
    if !cubemap.is_loaded && asset_server.load_state(&cubemap.image_handle) == LoadState::Loaded {
        info!("Swapping to {}...", CUBEMAPS[cubemap.index].0);
        let image = images.get_mut(&cubemap.image_handle).unwrap();
        // NOTE: PNGs do not have any metadata that could indicate they contain a cubemap texture,
        // so they appear as one texture. The following code reconfigures the texture as necessary.
        if image.texture_descriptor.array_layer_count() == 1 {
            image.reinterpret_stacked_2d_as_array(image.height() / image.width());
            image.texture_view_descriptor = Some(TextureViewDescriptor {
                dimension: Some(TextureViewDimension::Cube),
                ..default()
            });
        }

        for mut skybox in &mut skyboxes {
            skybox.image = cubemap.image_handle.clone();
        }

        cubemap.is_loaded = true;
    }
}
More examples
Hide additional examples
examples/shader/array_texture.rs (line 66)
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fn create_array_texture(
    mut commands: Commands,
    asset_server: Res<AssetServer>,
    mut loading_texture: ResMut<LoadingTexture>,
    mut images: ResMut<Assets<Image>>,
    mut meshes: ResMut<Assets<Mesh>>,
    mut materials: ResMut<Assets<ArrayTextureMaterial>>,
) {
    if loading_texture.is_loaded
        || asset_server.load_state(loading_texture.handle.id()) != LoadState::Loaded
    {
        return;
    }
    loading_texture.is_loaded = true;
    let image = images.get_mut(&loading_texture.handle).unwrap();

    // Create a new array texture asset from the loaded texture.
    let array_layers = 4;
    image.reinterpret_stacked_2d_as_array(array_layers);

    // Spawn some cubes using the array texture
    let mesh_handle = meshes.add(Cuboid::default());
    let material_handle = materials.add(ArrayTextureMaterial {
        array_texture: loading_texture.handle.clone(),
    });
    for x in -5..=5 {
        commands.spawn(MaterialMeshBundle {
            mesh: mesh_handle.clone(),
            material: material_handle.clone(),
            transform: Transform::from_xyz(x as f32 + 0.5, 0.0, 0.0),
            ..Default::default()
        });
    }
}

pub fn convert(&self, new_format: TextureFormat) -> Option<Image>

Convert a texture from a format to another. Only a few formats are supported as input and output:

  • TextureFormat::R8Unorm
  • TextureFormat::Rg8Unorm
  • TextureFormat::Rgba8UnormSrgb

To get Image as a [image::DynamicImage] see: Image::try_into_dynamic.

pub fn from_buffer( name: String, buffer: &[u8], image_type: ImageType<'_>, supported_compressed_formats: CompressedImageFormats, is_srgb: bool, image_sampler: ImageSampler, asset_usage: RenderAssetUsages ) -> Result<Image, TextureError>

Load a bytes buffer in a Image, according to type image_type, using the image crate

pub fn is_compressed(&self) -> bool

Whether the texture format is compressed or uncompressed

§

impl Image

pub fn from_dynamic( dyn_img: DynamicImage, is_srgb: bool, asset_usage: RenderAssetUsages ) -> Image

Converts a [DynamicImage] to an Image.

pub fn try_into_dynamic(self) -> Result<DynamicImage, IntoDynamicImageError>

Convert a Image to a [DynamicImage]. Useful for editing image data. Not all TextureFormat are covered, therefore it will return an error if the format is unsupported. Supported formats are:

  • TextureFormat::R8Unorm
  • TextureFormat::Rg8Unorm
  • TextureFormat::Rgba8UnormSrgb
  • TextureFormat::Bgra8UnormSrgb

To convert Image to a different format see: Image::convert.

Examples found in repository?
examples/app/headless_renderer.rs (line 518)
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fn update(
    images_to_save: Query<&ImageToSave>,
    receiver: Res<MainWorldReceiver>,
    mut images: ResMut<Assets<Image>>,
    mut scene_controller: ResMut<SceneController>,
    mut app_exit_writer: EventWriter<AppExit>,
    mut file_number: Local<u32>,
) {
    if let SceneState::Render(n) = scene_controller.state {
        if n < 1 {
            // We don't want to block the main world on this,
            // so we use try_recv which attempts to receive without blocking
            let mut image_data = Vec::new();
            while let Ok(data) = receiver.try_recv() {
                // image generation could be faster than saving to fs,
                // that's why use only last of them
                image_data = data;
            }
            if !image_data.is_empty() {
                for image in images_to_save.iter() {
                    // Fill correct data from channel to image
                    let img_bytes = images.get_mut(image.id()).unwrap();

                    // We need to ensure that this works regardless of the image dimensions
                    // If the image became wider when copying from the texture to the buffer,
                    // then the data is reduced to its original size when copying from the buffer to the image.
                    let row_bytes = img_bytes.width() as usize
                        * img_bytes.texture_descriptor.format.pixel_size();
                    let aligned_row_bytes = RenderDevice::align_copy_bytes_per_row(row_bytes);
                    if row_bytes == aligned_row_bytes {
                        img_bytes.data.clone_from(&image_data);
                    } else {
                        // shrink data to original image size
                        img_bytes.data = image_data
                            .chunks(aligned_row_bytes)
                            .take(img_bytes.height() as usize)
                            .flat_map(|row| &row[..row_bytes.min(row.len())])
                            .cloned()
                            .collect();
                    }

                    // Create RGBA Image Buffer
                    let img = match img_bytes.clone().try_into_dynamic() {
                        Ok(img) => img.to_rgba8(),
                        Err(e) => panic!("Failed to create image buffer {e:?}"),
                    };

                    // Prepare directory for images, test_images in bevy folder is used here for example
                    // You should choose the path depending on your needs
                    let images_dir = PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("test_images");
                    info!("Saving image to: {images_dir:?}");
                    std::fs::create_dir_all(&images_dir).unwrap();

                    // Choose filename starting from 000.png
                    let image_path = images_dir.join(format!("{:03}.png", file_number.deref()));
                    *file_number.deref_mut() += 1;

                    // Finally saving image to file, this heavy blocking operation is kept here
                    // for example simplicity, but in real app you should move it to a separate task
                    if let Err(e) = img.save(image_path) {
                        panic!("Failed to save image: {}", e);
                    };
                }
                if scene_controller.single_image {
                    app_exit_writer.send(AppExit::Success);
                }
            }
        } else {
            // clears channel for skipped frames
            while receiver.try_recv().is_ok() {}
            scene_controller.state = SceneState::Render(n - 1);
        }
    }
}

Trait Implementations§

§

impl Clone for Image

§

fn clone(&self) -> Image

Returns a copy of the value. Read more
1.0.0 · source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
§

impl Debug for Image

§

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
§

impl Default for Image

§

fn default() -> Image

default is a 1x1x1 all ‘1.0’ texture

§

impl FromReflect for Image
where Image: Any + Send + Sync,

§

fn from_reflect(reflect: &(dyn Reflect + 'static)) -> Option<Image>

Constructs a concrete instance of Self from a reflected value.
§

fn take_from_reflect( reflect: Box<dyn Reflect> ) -> Result<Self, Box<dyn Reflect>>

Attempts to downcast the given value to Self using, constructing the value using from_reflect if that fails. Read more
§

impl GetTypeRegistration for Image
where Image: Any + Send + Sync,

§

fn get_type_registration() -> TypeRegistration

Returns the default TypeRegistration for this type.
§

fn register_type_dependencies(registry: &mut TypeRegistry)

Registers other types needed by this type. Read more
§

impl Reflect for Image
where Image: Any + Send + Sync,

§

fn get_represented_type_info(&self) -> Option<&'static TypeInfo>

Returns the TypeInfo of the type represented by this value. Read more
§

fn into_any(self: Box<Image>) -> Box<dyn Any>

Returns the value as a Box<dyn Any>.
§

fn as_any(&self) -> &(dyn Any + 'static)

Returns the value as a &dyn Any.
§

fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Returns the value as a &mut dyn Any.
§

fn into_reflect(self: Box<Image>) -> Box<dyn Reflect>

Casts this type to a boxed reflected value.
§

fn as_reflect(&self) -> &(dyn Reflect + 'static)

Casts this type to a reflected value.
§

fn as_reflect_mut(&mut self) -> &mut (dyn Reflect + 'static)

Casts this type to a mutable reflected value.
§

fn clone_value(&self) -> Box<dyn Reflect>

Clones the value as a Reflect trait object. Read more
§

fn try_apply( &mut self, value: &(dyn Reflect + 'static) ) -> Result<(), ApplyError>

Tries to apply a reflected value to this value. Read more
§

fn set(&mut self, value: Box<dyn Reflect>) -> Result<(), Box<dyn Reflect>>

Performs a type-checked assignment of a reflected value to this value. Read more
§

fn reflect_kind(&self) -> ReflectKind

Returns a zero-sized enumeration of “kinds” of type. Read more
§

fn reflect_ref(&self) -> ReflectRef<'_>

Returns an immutable enumeration of “kinds” of type. Read more
§

fn reflect_mut(&mut self) -> ReflectMut<'_>

Returns a mutable enumeration of “kinds” of type. Read more
§

fn reflect_owned(self: Box<Image>) -> ReflectOwned

Returns an owned enumeration of “kinds” of type. Read more
§

fn apply(&mut self, value: &(dyn Reflect + 'static))

Applies a reflected value to this value. Read more
§

fn reflect_hash(&self) -> Option<u64>

Returns a hash of the value (which includes the type). Read more
§

fn reflect_partial_eq(&self, _value: &(dyn Reflect + 'static)) -> Option<bool>

Returns a “partial equality” comparison result. Read more
§

fn debug(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Debug formatter for the value. Read more
§

fn serializable(&self) -> Option<Serializable<'_>>

Returns a serializable version of the value. Read more
§

fn is_dynamic(&self) -> bool

Indicates whether or not this type is a dynamic type. Read more
§

impl TypePath for Image
where Image: Any + Send + Sync,

§

fn type_path() -> &'static str

Returns the fully qualified path of the underlying type. Read more
§

fn short_type_path() -> &'static str

Returns a short, pretty-print enabled path to the type. Read more
§

fn type_ident() -> Option<&'static str>

Returns the name of the type, or None if it is anonymous. Read more
§

fn crate_name() -> Option<&'static str>

Returns the name of the crate the type is in, or None if it is anonymous. Read more
§

fn module_path() -> Option<&'static str>

Returns the path to the module the type is in, or None if it is anonymous. Read more
§

impl Typed for Image
where Image: Any + Send + Sync,

§

fn type_info() -> &'static TypeInfo

Returns the compile-time info for the underlying type.
§

impl VisitAssetDependencies for Image

§

fn visit_dependencies(&self, visit: &mut impl FnMut(UntypedAssetId))

§

impl Asset for Image

Auto Trait Implementations§

§

impl Freeze for Image

§

impl RefUnwindSafe for Image

§

impl Send for Image

§

impl Sync for Image

§

impl Unpin for Image

§

impl UnwindSafe for Image

Blanket Implementations§

source§

impl<T> Any for T
where T: 'static + ?Sized,

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
§

impl<T, U> AsBindGroupShaderType<U> for T
where U: ShaderType, &'a T: for<'a> Into<U>,

§

fn as_bind_group_shader_type(&self, _images: &RenderAssets<GpuImage>) -> U

Return the T ShaderType for self. When used in AsBindGroup derives, it is safe to assume that all images in self exist.
§

impl<A> AssetContainer for A
where A: Asset,

§

fn insert(self: Box<A>, id: UntypedAssetId, world: &mut World)

§

fn asset_type_name(&self) -> &'static str

source§

impl<T> Borrow<T> for T
where T: ?Sized,

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
§

impl<T> Downcast<T> for T

§

fn downcast(&self) -> &T

§

impl<T> Downcast for T
where T: Any,

§

fn into_any(self: Box<T>) -> Box<dyn Any>

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait.
§

fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.
§

fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.
§

fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.
§

impl<T> DowncastSync for T
where T: Any + Send + Sync,

§

fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Send + Sync>

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait.
§

impl<T> DynamicTypePath for T
where T: TypePath,

source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

§

impl<S> FromSample<S> for S

§

fn from_sample_(s: S) -> S

§

impl<T> FromWorld for T
where T: Default,

§

fn from_world(_world: &mut World) -> T

Creates Self using data from the given World.
§

impl<T> GetPath for T
where T: Reflect + ?Sized,

§

fn reflect_path<'p>( &self, path: impl ReflectPath<'p> ) -> Result<&(dyn Reflect + 'static), ReflectPathError<'p>>

Returns a reference to the value specified by path. Read more
§

fn reflect_path_mut<'p>( &mut self, path: impl ReflectPath<'p> ) -> Result<&mut (dyn Reflect + 'static), ReflectPathError<'p>>

Returns a mutable reference to the value specified by path. Read more
§

fn path<'p, T>( &self, path: impl ReflectPath<'p> ) -> Result<&T, ReflectPathError<'p>>
where T: Reflect,

Returns a statically typed reference to the value specified by path. Read more
§

fn path_mut<'p, T>( &mut self, path: impl ReflectPath<'p> ) -> Result<&mut T, ReflectPathError<'p>>
where T: Reflect,

Returns a statically typed mutable reference to the value specified by path. Read more
§

impl<T> Instrument for T

§

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
§

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
source§

impl<T, U> Into<U> for T
where U: From<T>,

source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

source§

impl<T> IntoEither for T

source§

fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<F, T> IntoSample<T> for F
where T: FromSample<F>,

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fn into_sample(self) -> T

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impl<T> NoneValue for T
where T: Default,

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type NoneType = T

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fn null_value() -> T

The none-equivalent value.
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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<R, P> ReadPrimitive<R> for P
where R: Read + ReadEndian<P>, P: Default,

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fn read_from_little_endian(read: &mut R) -> Result<Self, Error>

Read this value from the supplied reader. Same as ReadEndian::read_from_little_endian().
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fn read_from_big_endian(read: &mut R) -> Result<Self, Error>

Read this value from the supplied reader. Same as ReadEndian::read_from_big_endian().
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fn read_from_native_endian(read: &mut R) -> Result<Self, Error>

Read this value from the supplied reader. Same as ReadEndian::read_from_native_endian().
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> ToSample<U> for T
where U: FromSample<T>,

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fn to_sample_(self) -> U

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> TypeData for T
where T: 'static + Send + Sync + Clone,

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fn clone_type_data(&self) -> Box<dyn TypeData>

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impl<T> Upcast<T> for T

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fn upcast(&self) -> Option<&T>

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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<T> ConditionalSend for T
where T: Send,

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impl<S, T> Duplex<S> for T
where T: FromSample<S> + ToSample<S>,

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impl<T> Settings for T
where T: 'static + Send + Sync,

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impl<T> WasmNotSend for T
where T: Send,

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impl<T> WasmNotSendSync for T
where T: WasmNotSend + WasmNotSync,

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impl<T> WasmNotSync for T
where T: Sync,