(Legacy): FL3 archives and BM2 images.

2026-07-08 01:30:18 +08:00 · 2018-08-20 14:41:38 +04:00
parent be76fa6028
commit 813ed39c76
3 changed files with 207 additions and 2 deletions
--- a/Legacy/Aaru/ImageBM2.cs
+++ b/Legacy/Aaru/ImageBM2.cs
@@ -0,0 +1,129 @@
+//! \file       ImageBM2.cs
+//! \date       2018 Aug 07
+//! \brief      Aaru bitmap 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;
+using System.ComponentModel.Composition;
+using System.IO;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+
+namespace GameRes.Formats.Aaru
+{
+    [Export(typeof(ImageFormat))]
+    public class Bm2Format : ImageFormat
+    {
+        public override string         Tag { get { return "BM2"; } }
+        public override string Description { get { return "Aaru bitmap format"; } }
+        public override uint     Signature { get { return 0x41324D42; } } // 'BM2A'
+
+        public override ImageMetaData ReadMetaData (IBinaryStream file)
+        {
+            var header = file.ReadHeader (0x16);
+            int bpp = header.ToUInt16 (8);
+            if (bpp != 8 && bpp != 24)
+                return null;
+            return new ImageMetaData {
+                BPP     = bpp,
+                OffsetX = header.ToInt16 (0xA),
+                OffsetY = header.ToInt16 (0xC),
+                Width   = header.ToUInt16 (0xE),
+                Height  = header.ToUInt16 (0x10),
+            };
+        }
+
+        public override ImageData Read (IBinaryStream file, ImageMetaData info)
+        {
+            var reader = new Bm2Reader (file, info);
+            var pixels = reader.Unpack();
+            return ImageData.Create (info, reader.Format, reader.Palette, pixels, reader.Stride);
+        }
+
+        public override void Write (Stream file, ImageData image)
+        {
+            throw new System.NotImplementedException ("Bm2Format.Write not implemented");
+        }
+    }
+
+    internal class Bm2Reader
+    {
+        IBinaryStream   m_input;
+        ImageMetaData   m_info;
+        int             m_stride;
+        byte[]          m_output;
+
+        public BitmapPalette Palette { get; private set; }
+        public PixelFormat    Format { get; private set; }
+        public int            Stride { get { return m_stride; } }
+
+        public Bm2Reader (IBinaryStream input, ImageMetaData info)
+        {
+            m_input = input;
+            m_info = info;
+            m_stride = 4 * (int)m_info.Width;
+            m_output = new byte[m_stride * (int)m_info.Height];
+            Format = PixelFormats.Bgra32;
+        }
+
+        public byte[] Unpack ()
+        {
+            m_input.Position = 0x16;
+            if (8 == m_info.BPP)
+                Unpack8bpp();
+            else
+                Unpack32bpp();
+            return m_output;
+        }
+
+        void Unpack8bpp ()
+        {
+            var palette = ImageFormat.ReadColorMap (m_input.AsStream);
+            int dst = 0;
+            while (dst < m_output.Length)
+            {
+                byte alpha = m_input.ReadUInt8();
+                byte index = m_input.ReadUInt8();
+                var color = palette[index];
+                m_output[dst++] = color.B;
+                m_output[dst++] = color.G;
+                m_output[dst++] = color.R;
+                m_output[dst++] = alpha;
+            }
+        }
+
+        void Unpack32bpp ()
+        {
+            int dst = 0;
+            var buffer = new byte[4];
+            while (dst < m_output.Length)
+            {
+                m_input.Read (buffer, 0, 4);
+                m_output[dst++] = buffer[1];
+                m_output[dst++] = buffer[2];
+                m_output[dst++] = buffer[3];
+                m_output[dst++] = buffer[0];
+            }
+        }
+    }
+}