molgfx-render 0.1.1

The render graph, passes and the engine that drives a frame.
Documentation 
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//! Portable two-dimensional compute dispatch sizing.

const MAX_DISPATCH_AXIS: u64 = 65_535;

/// Maps a linear workgroup count onto portable WebGPU X/Y limits.
pub(super) fn workgroups_2d(total: u64) -> [u32; 2] {
    if total == 0 {
        return [0, 0];
    }
    // Choose Y first, then the shortest X that covers the linear workload.
    // This avoids nearly doubling the dispatch at MAX_DISPATCH_AXIS + 1 while
    // preserving a dense row-major index in the shader.
    let y = total.div_ceil(MAX_DISPATCH_AXIS);
    let x = total.div_ceil(y);
    debug_assert!(x <= MAX_DISPATCH_AXIS && y <= MAX_DISPATCH_AXIS);
    [
        crate::fallback(u32::try_from(x), u32::MAX),
        crate::fallback(u32::try_from(y), u32::MAX),
    ]
}

#[cfg(test)]
#[path = "dispatch_tests.rs"]
mod tests;