template project, first version

DirectXTK/MakeSpriteFont/GlyphCropper.cs

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+// DirectXTK MakeSpriteFont tool
+//
+// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
+// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
+// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
+// PARTICULAR PURPOSE.
+//
+// Copyright (c) Microsoft Corporation. All rights reserved.
+//
+// http://go.microsoft.com/fwlink/?LinkId=248929
+
+using System.Drawing;
+
+namespace MakeSpriteFont
+{
+    // Crops unused space from around the edge of a glyph bitmap.
+    public static class GlyphCropper
+    {
+        public static void Crop(Glyph glyph)
+        {
+            // Crop the top.
+            while ((glyph.Subrect.Height > 1) && BitmapUtils.IsAlphaEntirely(0, glyph.Bitmap, new Rectangle(glyph.Subrect.X, glyph.Subrect.Y, glyph.Subrect.Width, 1)))
+            {
+                glyph.Subrect.Y++;
+                glyph.Subrect.Height--;
+
+                glyph.YOffset++;
+            }
+
+            // Crop the bottom.
+            while ((glyph.Subrect.Height > 1) && BitmapUtils.IsAlphaEntirely(0, glyph.Bitmap, new Rectangle(glyph.Subrect.X, glyph.Subrect.Bottom - 1, glyph.Subrect.Width, 1)))
+            {
+                glyph.Subrect.Height--;
+            }
+
+            // Crop the left.
+            while ((glyph.Subrect.Width > 1) && BitmapUtils.IsAlphaEntirely(0, glyph.Bitmap, new Rectangle(glyph.Subrect.X, glyph.Subrect.Y, 1, glyph.Subrect.Height)))
+            {
+                glyph.Subrect.X++;
+                glyph.Subrect.Width--;
+
+                glyph.XOffset++;
+            }
+
+            // Crop the right.
+            while ((glyph.Subrect.Width > 1) && BitmapUtils.IsAlphaEntirely(0, glyph.Bitmap, new Rectangle(glyph.Subrect.Right - 1, glyph.Subrect.Y, 1, glyph.Subrect.Height)))
+            {
+                glyph.Subrect.Width--;
+
+                glyph.XAdvance++;
+            }
+        }
+    }
+}