Update FrmMain.cs - 2nd rev.

This time I have pre-computed all the font colors into a table named _fontColor.

These pre-computed values are created as soon as the _displayColor table is finished being created.

Using these pre-computed values is more efficient than computing them for every entry in the GameGrid and RomGrid.

ROMVault2/FrmMain.cs

@@ -33,6 +33,7 @@ namespace ROMVault2
         private static readonly Color CWhite = Color.FromArgb(255, 255, 255);
 
         private readonly Color[] _displayColor;
+        private readonly Color[] _fontColor;
 
         private bool _updatingGameGrid;
 	
@@ -59,13 +60,6 @@ namespace ROMVault2
             _scaleFactorY *= factor.Height;
         }
 
-        // returns either white or black, depending of quick luminance of Color "a"
-        // probably should be pre-computed into a table, corresponding to _displayColor
-        private Color contrasty(Color a)
-        {
-            return (a.R << 1) + a.B + a.G + (a.G << 2) < 1024 ? Color.White : Color.Black;
-        }
-
         public FrmMain()
         {
 
@@ -77,6 +71,7 @@ namespace ROMVault2
 
 
             _displayColor = new Color[(int)RepStatus.EndValue];
+            _fontColor = new Color[(int)RepStatus.EndValue];
 
             // RepStatus.UnSet
 
@@ -108,6 +103,9 @@ namespace ROMVault2
 
             _displayColor[(int)RepStatus.Deleted] = CWhite;
 
+            for (int i = 0; i < (int)RepStatus.EndValue; i++)
+                _fontColor[i] = contrasty(_displayColor[i]);
+
             _gameGridColumnXPositions = new int[(int)RepStatus.EndValue];
 
             DirTree.Setup(ref DB.DirTree);
@@ -752,7 +750,7 @@ namespace ROMVault2
             RvDir tRvDir = (RvDir)GameGrid.Rows[e.RowIndex].Tag;
             ReportStatus tDirStat = tRvDir.DirStatus;
             Color bgCol = Color.FromArgb(255, 255, 255);
-            Color fgCol = contrasty(bgCol);
+            Color fgCol = Color.FromArgb(0, 0, 0);
 
             if (cellBounds.Width == 0 || cellBounds.Height == 0)
                 return;
@@ -762,13 +760,12 @@ namespace ROMVault2
                 if (tDirStat.Get(t1) <= 0) continue;
 
                 bgCol = _displayColor[(int)t1];
-                fgCol = contrasty(bgCol);
+                fgCol = _fontColor[(int)t1];
                 break;
             }
 
             if (GameGrid.Columns[e.ColumnIndex].Name == "Type")
             {
-            	
                 e.CellStyle.BackColor = bgCol;
                 e.CellStyle.SelectionBackColor = bgCol;
                 e.CellStyle.ForeColor = fgCol;
@@ -810,7 +807,7 @@ namespace ROMVault2
             else if (GameGrid.Columns[e.ColumnIndex].Name == "CGame")
             {
                 e.CellStyle.BackColor = bgCol;
-                e.CellStyle.ForeColor = contrasty(bgCol);
+                e.CellStyle.ForeColor = fgCol;
 
                 if (String.IsNullOrEmpty(tRvDir.FileName))
                     e.Value = tRvDir.Name;
@@ -820,7 +817,7 @@ namespace ROMVault2
             else if (GameGrid.Columns[e.ColumnIndex].Name == "CDescription")
             {
                 e.CellStyle.BackColor = bgCol;
-                e.CellStyle.ForeColor = contrasty(bgCol);
+                e.CellStyle.ForeColor = fgCol;
 
                 if (tRvDir.Game != null)
                     e.Value = tRvDir.Game.GetData(RvGame.GameData.Description);
@@ -1305,6 +1302,13 @@ namespace ROMVault2
             }
         }
 
+        // returns either white or black, depending of quick luminance of the Color " a "
+        // called when the _displayColor is finished, in order to populate the _fontColor table.
+        private Color contrasty(Color a)
+        {
+            return (a.R << 1) + a.B + a.G + (a.G << 2) < 1024 ? Color.White : Color.Black;
+        }
+
         private void AddRom(RvFile tRomTable, string pathAdd)
         {
 
@@ -1316,12 +1320,10 @@ namespace ROMVault2
 
                 for (int i = 0; i < RomGrid.Rows[row].Cells.Count; i++)
                 {
-                    Color bc;
                     DataGridViewCellStyle cs = RomGrid.Rows[row].Cells[i].Style;
-                    cs.BackColor = (bc = _displayColor[(int)tRomTable.RepStatus]);
+                    cs.BackColor = _displayColor[(int)tRomTable.RepStatus];
-                    cs.ForeColor = contrasty(bc);
+                    cs.ForeColor = _fontColor[(int)tRomTable.RepStatus];
                 }
-                
                 string fname = pathAdd + tRomTable.Name;
                 if (!string.IsNullOrEmpty(tRomTable.FileName))
                     fname += " (Found: " + tRomTable.FileName + ")";