implementation of vkCmdFillBuffer and rework of logger

src/soft/Executor.zig

@@ -15,5 +15,20 @@ pub fn deinit(self: *Self) void {
 
 pub fn dispatch(self: *Self, command: *const cmd.Command) void {
     _ = self;
-    _ = command;
+    switch (command.*) {
+        .FillBuffer => |data| fillBuffer(&data),
+        else => {},
+    }
+}
+
+fn fillBuffer(data: *const cmd.CommandFillBuffer) void {
+    const memory = if (data.buffer.memory) |memory| memory else unreachable;
+    const raw_memory_map: [*]u32 = @ptrCast(@alignCast(memory.map(data.offset, data.size) catch unreachable));
+    var memory_map: []u32 = raw_memory_map[0..data.size];
+
+    for (0..@divExact(data.size, @sizeOf(u32))) |i| {
+        memory_map[i] = data.data;
+    }
+
+    memory.unmap();
 }