vka 0.0.4

A minimal vulkan wrapper
Documentation 
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use ash::vk;
use vka;
use vka::RenderingDeviceDesc;

pub fn main() {
    env_logger::init();
    let rd = vka::RenderingDevice::new(&RenderingDeviceDesc::default().with_gpu_validation()).unwrap();

    let buffer = rd.new_buffer(&vka::BufferDesc::uniform(4 * 1024));
    let image = rd.new_image(&vka::ImageDesc::new_2d(vk::Format::R8G8B8A8_UNORM, 256, 256));

    let mut cmd = rd.new_command_buffer();
    cmd.clear_color_image(
        &image,
        vk::ClearColorValue { float32: [1.0, 0.0, 0.0, 1.0] },
        &[image.full_range()],
    );
    rd.submit([cmd.finish()], None);

    rd.write_buffer(&buffer, &[1u8, 1u8, 1u8, 0u8, 0, 0], 0);
    rd.wait_queue();

    let mut read_data = [0; 6];
    rd.read_buffer(&buffer, &mut read_data, 0); // this is implicitly immediate.
    assert_eq!(read_data, [1, 1, 1, 0, 0, 0]);
    println!("Demo succeeded!");
}