From b180d929b6035934cf62d314a911a50565b01275 Mon Sep 17 00:00:00 2001
From: morkt <morkt@users.noreply.github.com>
Date: Thu, 18 Oct 2018 22:59:39 +0400
Subject: [PATCH] implemented HBM images.

---
 ArcFormats/Rits/ImageHBM.cs | 88 +++++++++++++++++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 ArcFormats/Rits/ImageHBM.cs

diff --git a/ArcFormats/Rits/ImageHBM.cs b/ArcFormats/Rits/ImageHBM.cs
new file mode 100644
index 00000000..f2f213c0
--- /dev/null
+++ b/ArcFormats/Rits/ImageHBM.cs
@@ -0,0 +1,88 @@
+//! \file       ImageHBM.cs
+//! \date       2018 Oct 18
+//! \brief      Rits engine image format.
+//
+// Copyright (C) 2018 by morkt
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//
+
+using System.ComponentModel.Composition;
+using System.IO;
+using System.Windows.Media;
+using GameRes.Compression;
+
+namespace GameRes.Formats.Rits
+{
+    internal class HbmMetaData : ImageMetaData
+    {
+        public bool IsCompressed;
+        public bool IsFlipped;
+    }
+
+    [Export(typeof(ImageFormat))]
+    public class HbmFormat : ImageFormat
+    {
+        public override string         Tag { get { return "HBM"; } }
+        public override string Description { get { return "Rit's image format"; } }
+        public override uint     Signature { get { return 0x4D4248; } } // 'HBM'
+
+        public override ImageMetaData ReadMetaData (IBinaryStream file)
+        {
+            var header = file.ReadHeader (0x10);
+            return new HbmMetaData {
+                Width  = header.ToUInt32 (4),
+                Height = header.ToUInt32 (8),
+                BPP    = 16,
+                IsCompressed = (header[12] & 0x10) != 0,
+                IsFlipped    = (header[12] & 0x20) != 0,
+            };
+        }
+
+        public override ImageData Read (IBinaryStream file, ImageMetaData info)
+        {
+            var meta = (HbmMetaData)info;
+            int stride = (2 * (int)meta.Width + 3) & ~3;
+            var pixels = new byte[stride * (int)meta.Height];
+            Stream input = file.AsStream;
+            if (meta.IsCompressed)
+            {
+                input.Position = 0x14;
+                input = new ZLibStream (input, CompressionMode.Decompress, true);
+            }
+            else
+                input.Position = 0x10;
+            if (meta.IsFlipped)
+            {
+                for (int dst = pixels.Length - stride; dst >= 0; dst -= stride)
+                    input.Read (pixels, dst, stride);
+            }
+            else
+                input.Read (pixels, 0, pixels.Length);
+            if (input != file.AsStream)
+                input.Dispose();
+            return ImageData.Create (info, PixelFormats.Bgr555, null, pixels, stride);
+        }
+
+        public override void Write (Stream file, ImageData image)
+        {
+            throw new System.NotImplementedException ("HbmFormat.Write not implemented");
+        }
+    }
+}