From 3b1decad392e4eb50d8875d19b5bf2e4170e1a40 Mon Sep 17 00:00:00 2001
From: VoidX <voidxb@gmail.com>
Date: Sat, 12 Oct 2024 01:04:53 +0200
Subject: [PATCH] Dashed lines in overlays

---
 Cavern.QuickEQ/Graphing/Overlays/Frame.cs      | 18 ++++++++++++++++++
 .../Graphing/Overlays/LogScaleGrid.cs          |  2 +-
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/Cavern.QuickEQ/Graphing/Overlays/Frame.cs b/Cavern.QuickEQ/Graphing/Overlays/Frame.cs
index a27d5bf0..21f35c20 100644
--- a/Cavern.QuickEQ/Graphing/Overlays/Frame.cs
+++ b/Cavern.QuickEQ/Graphing/Overlays/Frame.cs
@@ -65,5 +65,23 @@ protected void DrawColumn(GraphRenderer target, int offset, int width, uint colo
                 width--;
             }
         }
+
+        /// <summary>
+        /// Draw a single dashed column at a width <paramref name="offset"/> of a developing image.
+        /// </summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        protected void DrawDashedColumn(GraphRenderer target, int offset, int width, int dashLength, uint color) {
+            uint[] pixels = target.Pixels;
+            while (width > 0) {
+                for (int y = 0, pos = offset, step = target.Width; y < target.Height; y++) {
+                    if (((y / dashLength) & 2) == 0) {
+                        pixels[pos] = color;
+                    }
+                    pos += step;
+                }
+                offset++;
+                width--;
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/Cavern.QuickEQ/Graphing/Overlays/LogScaleGrid.cs b/Cavern.QuickEQ/Graphing/Overlays/LogScaleGrid.cs
index 07de978e..47677951 100644
--- a/Cavern.QuickEQ/Graphing/Overlays/LogScaleGrid.cs
+++ b/Cavern.QuickEQ/Graphing/Overlays/LogScaleGrid.cs
@@ -9,7 +9,7 @@ public class LogScaleGrid : Frame {
         /// <summary>
         /// Inner line stroke width.
         /// </summary>
-        readonly int gridWidth;
+        protected readonly int gridWidth;
 
         /// <summary>
         /// Number of rows drawn, including the frame lines.