From 831fd9fb3b732dd2e992616cf0b58349a417c9a3 Mon Sep 17 00:00:00 2001
From: windyfairy <windyfairy@users.noreply.github.com>
Date: Fri, 15 Nov 2019 14:31:52 +0900
Subject: [PATCH] Add (broken) support for paletted formats

---
 gitadora-textool/Program.cs | 59 ++++++++++++++++++++++++++++++++-----
 1 file changed, 52 insertions(+), 7 deletions(-)

diff --git a/gitadora-textool/Program.cs b/gitadora-textool/Program.cs
index d8bb021..f794a31 100644
--- a/gitadora-textool/Program.cs
+++ b/gitadora-textool/Program.cs
@@ -65,7 +65,7 @@ namespace gitadora_textool
             var endianCheck2 = reader.ReadInt32();
             var requiresEndianFix = endianCheck2 == 0x00010100;
             
-            reader.BaseStream.Seek(0x0c, SeekOrigin.Begin);
+            reader.BaseStream.Seek(0x0c, SeekOrigin.Begin);
 
             var dataSize = ReadInt32(reader, requiresEndianFix) - 0x40;
             var width = ReadInt16(reader, requiresEndianFix);
@@ -82,6 +82,7 @@ namespace gitadora_textool
                 BGRA_16BIT_FORMAT 0x0D
                 BGR_FORMAT 0x0E
                 BGRA_FORMAT 0x10
+                BGR_4BIT_FORMAT 0x11
                 BGR_8BIT_FORMAT 0x12
                 DXT1_FORMAT 0x16
                 DXT3_FORMAT 0x18
@@ -93,6 +94,8 @@ namespace gitadora_textool
             reader.BaseStream.Seek(0x40, SeekOrigin.Begin);
             var bitmapData = reader.ReadBytes(dataSize);
 
+            var paletteEntries = new List<Color>();
+
             var pixelFormat = PixelFormat.Undefined;
             if (dataFormat == 0x01)
             {
@@ -142,10 +145,41 @@ namespace gitadora_textool
                 // BGRA_FORMAT
                 pixelFormat = PixelFormat.Format32bppArgb;
             }
+            else if (dataFormat == 0x11)
+            {
+                // BGR_4BIT_FORMAT
+                var bitmapDataOnly = new byte[width * height / 2];
+                Buffer.BlockCopy(bitmapData, 0, bitmapDataOnly, 0, bitmapDataOnly.Length);
+
+                var paletteData = new byte[bitmapData.Length - bitmapDataOnly.Length - 0x14]; // Skip palette header
+                Buffer.BlockCopy(bitmapData, bitmapDataOnly.Length + 0x14, paletteData, 0, paletteData.Length);
+
+                bitmapData = bitmapDataOnly;
+
+                pixelFormat = PixelFormat.Format4bppIndexed;
+
+                for (int i = 0; i < paletteData.Length / 4; i++)
+                {
+                    paletteEntries.Add(Color.FromArgb(paletteData[i + 3], paletteData[i], paletteData[i + 1], paletteData[i + 2]));
+                }
+            }
             else if (dataFormat == 0x12)
             {
                 // BGR_8BIT_FORMAT
-                throw new Exception("Found BGR_8BIT_FORMAT");
+                var bitmapDataOnly = new byte[width * height];
+                Buffer.BlockCopy(bitmapData, 0, bitmapDataOnly, 0, bitmapDataOnly.Length);
+
+                var paletteData = new byte[bitmapData.Length - bitmapDataOnly.Length - 0x14]; // Skip palette header
+                Buffer.BlockCopy(bitmapData, bitmapDataOnly.Length + 0x14, paletteData, 0, paletteData.Length);
+
+                bitmapData = bitmapDataOnly;
+
+                pixelFormat = PixelFormat.Format8bppIndexed;
+
+                for (int i = 0; i < paletteData.Length / 4; i++)
+                {
+                    paletteEntries.Add(Color.FromArgb(paletteData[i + 3], paletteData[i], paletteData[i + 1], paletteData[i + 2]));
+                }
             }
             else if (dataFormat == 0x16)
             {
@@ -167,7 +201,7 @@ namespace gitadora_textool
             }
             else
             {
-                throw new Exception("Found unknown pixel format");
+                throw new Exception(String.Format("Found unknown pixel format: {0:x2}", dataFormat));
             }
             
             for (int i = 0; i < bitmapData.Length;)
@@ -290,11 +324,22 @@ namespace gitadora_textool
                 {
                     ColorPalette palette = b.Palette;
                     Color[] entries = palette.Entries;
-                    for (int i = 0; i < 256; i++)
-                    {
-                        Color c = Color.FromArgb((byte)i, (byte)i, (byte)i);
-                        entries[i] = c;
+
+                    if (paletteEntries.Count == 0)
+                    {
+                        for (int i = 0; i < 256; i++)
+                        {
+                            Color c = Color.FromArgb((byte)i, (byte)i, (byte)i);
+                            entries[i] = c;
+                        }
+                    } else
+                    {
+                        for (int i = 0; i < paletteEntries.Count; i++)
+                        {
+                            entries[i] = paletteEntries[i];
+                        }
                     }
+
                     b.Palette = palette;
                 }