Macro texture

macro_rules! texture {
    { @sampletype Float } => { ... };
    { @sampletype FloatFiltering } => { ... };
    { @sampletype Depth } => { ... };
    { @sampletype Sint } => { ... };
    { @sampletype Uint } => { ... };
    { $struct:ident {
        usage: $( $usage:ident )|+ ,
        dimension: $dimension:ident,
        sample_type: $sample:ident,
    } } => { ... };
}

usage: variants of wgpu::TextureUsages format: variant of wgpu::TextureFormat dimension: variant of wgpu::TextureViewDimension sample_type: Float, FloatFiltering, Depth, Sint, or Uint