zenthra-render 0.1.0

Wgpu-based GPU renderer for the Zenthra UI framework
Documentation 
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pub fn create_texture_bind_group(
    device: &wgpu::Device,
    queue: &wgpu::Queue,
    bgl: &wgpu::BindGroupLayout,
    bytes: &[u8],
) -> Result<(wgpu::BindGroup, u32, u32), image::ImageError> {
    let img = image::load_from_memory(bytes)?;
    let rgba = img.to_rgba8();
    let dimensions = rgba.dimensions();

    let size = wgpu::Extent3d {
        width: dimensions.0,
        height: dimensions.1,
        depth_or_array_layers: 1,
    };

    let texture = device.create_texture(&wgpu::TextureDescriptor {
        label: Some("Image Texture"),
        size,
        mip_level_count: 1,
        sample_count: 1,
        dimension: wgpu::TextureDimension::D2,
        format: wgpu::TextureFormat::Rgba8UnormSrgb,
        usage: wgpu::TextureUsages::TEXTURE_BINDING | wgpu::TextureUsages::COPY_DST,
        view_formats: &[],
    });

    queue.write_texture(
        wgpu::TexelCopyTextureInfo {
            texture: &texture,
            mip_level: 0,
            origin: wgpu::Origin3d::ZERO,
            aspect: wgpu::TextureAspect::All,
        },
        &rgba,
        wgpu::TexelCopyBufferLayout {
            offset: 0,
            bytes_per_row: Some(4 * dimensions.0),
            rows_per_image: Some(dimensions.1),
        },
        size,
    );

    let view = texture.create_view(&wgpu::TextureViewDescriptor::default());
    let sampler = device.create_sampler(&wgpu::SamplerDescriptor {
        address_mode_u: wgpu::AddressMode::ClampToEdge,
        address_mode_v: wgpu::AddressMode::ClampToEdge,
        address_mode_w: wgpu::AddressMode::ClampToEdge,
        mag_filter: wgpu::FilterMode::Linear,
        min_filter: wgpu::FilterMode::Linear,
        mipmap_filter: wgpu::MipmapFilterMode::Linear,
        ..Default::default()
    });

    let bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor {
        layout: bgl,
        entries: &[
            wgpu::BindGroupEntry {
                binding: 0,
                resource: wgpu::BindingResource::TextureView(&view),
            },
            wgpu::BindGroupEntry {
                binding: 1,
                resource: wgpu::BindingResource::Sampler(&sampler),
            },
        ],
        label: Some("Image Bind Group"),
    });

    Ok((bind_group, dimensions.0, dimensions.1))
}

pub fn create_texture_bind_group_thumbnail(
    device: &wgpu::Device,
    queue: &wgpu::Queue,
    bgl: &wgpu::BindGroupLayout,
    bytes: &[u8],
    max_dim: u32,
) -> Result<(wgpu::BindGroup, u32, u32), image::ImageError> {
    let img = image::load_from_memory(bytes)?;
    let resized = img.thumbnail(max_dim, max_dim);
    let rgba = resized.to_rgba8();
    let dimensions = rgba.dimensions();

    let size = wgpu::Extent3d {
        width: dimensions.0,
        height: dimensions.1,
        depth_or_array_layers: 1,
    };

    let texture = device.create_texture(&wgpu::TextureDescriptor {
        label: Some("Thumbnail Texture"),
        size,
        mip_level_count: 1,
        sample_count: 1,
        dimension: wgpu::TextureDimension::D2,
        format: wgpu::TextureFormat::Rgba8UnormSrgb,
        usage: wgpu::TextureUsages::TEXTURE_BINDING | wgpu::TextureUsages::COPY_DST,
        view_formats: &[],
    });

    queue.write_texture(
        wgpu::TexelCopyTextureInfo {
            texture: &texture,
            mip_level: 0,
            origin: wgpu::Origin3d::ZERO,
            aspect: wgpu::TextureAspect::All,
        },
        &rgba,
        wgpu::TexelCopyBufferLayout {
            offset: 0,
            bytes_per_row: Some(4 * dimensions.0),
            rows_per_image: Some(dimensions.1),
        },
        size,
    );

    let view = texture.create_view(&wgpu::TextureViewDescriptor::default());
    let sampler = device.create_sampler(&wgpu::SamplerDescriptor {
        address_mode_u: wgpu::AddressMode::ClampToEdge,
        address_mode_v: wgpu::AddressMode::ClampToEdge,
        address_mode_w: wgpu::AddressMode::ClampToEdge,
        mag_filter: wgpu::FilterMode::Linear,
        min_filter: wgpu::FilterMode::Linear,
        mipmap_filter: wgpu::MipmapFilterMode::Linear,
        ..Default::default()
    });

    let bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor {
        layout: bgl,
        entries: &[
            wgpu::BindGroupEntry {
                binding: 0,
                resource: wgpu::BindingResource::TextureView(&view),
            },
            wgpu::BindGroupEntry {
                binding: 1,
                resource: wgpu::BindingResource::Sampler(&sampler),
            },
        ],
        label: Some("Thumbnail Bind Group"),
    });

    Ok((bind_group, dimensions.0, dimensions.1))
}