Этап 2

Minint.Core/Services/IPatternGenerator.cs

@@ -0,0 +1,28 @@
+using Minint.Core.Models;
+
+namespace Minint.Core.Services;
+
+public enum PatternType
+{
+    Checkerboard,
+    HorizontalGradient,
+    VerticalGradient,
+    HorizontalStripes,
+    VerticalStripes,
+    ConcentricCircles,
+    Tile
+}
+
+public interface IPatternGenerator
+{
+    /// <summary>
+    /// Generates a new document with a single layer filled with the specified pattern.
+    /// </summary>
+    /// <param name="type">Pattern type.</param>
+    /// <param name="width">Image width in pixels.</param>
+    /// <param name="height">Image height in pixels.</param>
+    /// <param name="colors">Colors to use (interpretation depends on pattern type).</param>
+    /// <param name="param1">Primary parameter: cell/stripe size, ring width, etc.</param>
+    /// <param name="param2">Secondary parameter (optional, pattern-dependent).</param>
+    MinintDocument Generate(PatternType type, int width, int height, RgbaColor[] colors, int param1, int param2 = 0);
+}