Этап 2

Minint.Core/Services/IFragmentService.cs

@@ -0,0 +1,29 @@
+using Minint.Core.Models;
+
+namespace Minint.Core.Services;
+
+public interface IFragmentService
+{
+    /// <summary>
+    /// Copies a rectangular region from one document/layer to another.
+    /// Palette colors are merged: missing colors are added to the destination palette.
+    /// </summary>
+    /// <param name="srcDoc">Source document.</param>
+    /// <param name="srcLayerIndex">Index of the source layer.</param>
+    /// <param name="srcX">Source rectangle X origin.</param>
+    /// <param name="srcY">Source rectangle Y origin.</param>
+    /// <param name="regionWidth">Width of the region to copy.</param>
+    /// <param name="regionHeight">Height of the region to copy.</param>
+    /// <param name="dstDoc">Destination document.</param>
+    /// <param name="dstLayerIndex">Index of the destination layer.</param>
+    /// <param name="dstX">Destination X origin.</param>
+    /// <param name="dstY">Destination Y origin.</param>
+    /// <param name="containerWidth">Container width (shared by both docs).</param>
+    /// <param name="containerHeight">Container height (shared by both docs).</param>
+    void CopyFragment(
+        MinintDocument srcDoc, int srcLayerIndex,
+        int srcX, int srcY, int regionWidth, int regionHeight,
+        MinintDocument dstDoc, int dstLayerIndex,
+        int dstX, int dstY,
+        int containerWidth, int containerHeight);
+}