vulkane 0.2.0

Vulkan API bindings generated entirely from vk.xml, with a complete safe RAII wrapper covering compute and graphics: instance/device/queue, buffer, image, sampler, render pass, framebuffer, graphics + compute pipelines, swapchain, a VMA-style sub-allocator with TLSF + linear pools and defragmentation, sync primitives (fences, binary + timeline semaphores, sync2 barriers), query pools, and an optional naga GLSL/WGSL→SPIR-V feature. Supports Vulkan 1.2.175 onward — swap vk.xml and rebuild.
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// 2D storage-image compute shader: invert each pixel of an RGBA8 image.
//
// Reads each pixel via imageLoad, replaces it with (255 - R, 255 - G,
// 255 - B, A) via imageStore, then exits. Used by the
// `compute_image_invert` example to demonstrate the safe wrapper's
// 2D-storage-image path.
//
// Compile with:
//   glslc -O invert_image.comp -o invert_image.spv
//
// Or, with the vulkane crate's `naga` feature:
//   cargo run -p vulkane --features naga,fetch-spec --example compile_shader

#version 450

layout(local_size_x = 8, local_size_y = 8, local_size_z = 1) in;

// rgba8 storage image at descriptor set 0, binding 0.
// Naga's GLSL frontend doesn't currently accept the format-qualifier-only
// `layout(rgba8) uniform image2D` syntax for the SPIR-V output we need;
// we use the explicit `restrict` + format qualifier so the resulting
// SPIR-V matches what `STORAGE_IMAGE` expects with format `R8G8B8A8_UNORM`.
layout(set = 0, binding = 0, rgba8) uniform restrict image2D img;

void main() {
    ivec2 size = imageSize(img);
    ivec2 coord = ivec2(gl_GlobalInvocationID.xy);
    if (coord.x >= size.x || coord.y >= size.y) {
        return;
    }
    vec4 color = imageLoad(img, coord);
    imageStore(img, coord, vec4(1.0 - color.rgb, color.a));
}