experimental/webgpu/shaders/fill_buffer.wgsl

struct Params {
  offset : u32,
  length : u32,
  pattern : u32,
};
@binding(0) @group(0) var<uniform> params: Params;

struct OpaqueBuffer {
  data : array<u32>,
};
@binding(0) @group(1) var<storage, read_write> buffer: OpaqueBuffer;

@compute @workgroup_size(64, 1, 1)
fn main(@builtin(global_invocation_id) GlobalInvocationID : vec3<u32>) {
  var element_index : u32 = GlobalInvocationID.x;
  var element_range_start : u32 = element_index * 64u;
  var element_range_end : u32 = min(element_range_start + 64u, params.length / 4u);
  for (var i : u32 = element_range_start; i < element_range_end; i = i + 1u) {
    buffer.data[i] = params.pattern;
  }
}