pittore 0.2.4

Simple toolkit for 2D visualization based on wgpu.
Documentation 
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@group(0) @binding(0) var<uniform> scale: vec2f;
@group(0) @binding(1) var texture: texture_2d<f32>;
@group(0) @binding(2) var tex_sampler: sampler;

struct VertexOutput {
    @builtin(position) position: vec4f,
    @location(0) uv: vec2f,
}

@vertex
fn vs_main(
    @builtin(vertex_index) index: u32,    
) -> VertexOutput {
    var i: u32;
    if index < 3 { i = index; } else { i = 6 - index; }

    var out: VertexOutput;
    out.position = 
        vec4(
            scale * vec2(
                f32((i32(i) >> 1 & 1) * 2 - 1),
                f32(1 - (i32(i) & 1) * 2),
            ),
            0.0, 1.0
        );    
    out.uv = vec2(
        f32(i32(i) >> 1 & 1),
        f32(i32(i) & 1),
    );
    
    return out;
}

@fragment
fn fs_main(in: VertexOutput) -> @location(0) vec4f {
    return textureSample(texture, tex_sampler, in.uv);
}