vendoring NetVips

vendor/NetVips/VipsProgress.cs

@@ -0,0 +1,74 @@
+using System.Runtime.InteropServices;
+
+namespace NetVips;
+
+/// <summary>
+/// Records a start time, and counts microseconds elapsed since that time.
+/// </summary>
+[StructLayout(LayoutKind.Sequential)]
+public struct GTimer
+{
+    /// <summary>
+    /// Monotonic start time, in microseconds.
+    /// </summary>
+    public ulong Start;
+
+    /// <summary>
+    /// Monotonic end time, in microseconds.
+    /// </summary>
+    public ulong End;
+
+    /// <summary>
+    /// Is the timer currently active?
+    /// </summary>
+    [MarshalAs(UnmanagedType.I1)]
+    public bool Active;
+}
+
+/// <summary>
+/// Struct we keep a record of execution time in. Passed to eval signal so
+/// it can assess progress.
+/// </summary>
+[StructLayout(LayoutKind.Sequential)]
+public struct VipsProgress
+{
+    /// <summary>
+    /// Image we are part of.
+    /// </summary>
+    private nint Im;
+
+    /// <summary>
+    /// Time we have been running.
+    /// </summary>
+    public int Run;
+
+    /// <summary>
+    /// Estimated seconds of computation left.
+    /// </summary>
+    public int Eta;
+
+    /// <summary>
+    /// Number of pels we expect to calculate.
+    /// </summary>
+    public long TPels;
+
+    /// <summary>
+    ///  Number of pels calculated so far.
+    /// </summary>
+    public long NPels;
+
+    /// <summary>
+    /// Percent complete.
+    /// </summary>
+    public int Percent;
+
+    /// <summary>
+    /// Start time.
+    /// </summary>
+    private nint StartPtr;
+
+    /// <summary>
+    /// Start time.
+    /// </summary>
+    public GTimer Start => Marshal.PtrToStructure<GTimer>(StartPtr);
+}