- Just remembered that the true color stuff generates textures differently. Changed the previous commit to expand 1, 2, and 4 bit grayscale images while reading the PNG instead of changing the palette.

SVN r4289 (trunk)

src/textures/pngtexture.cpp

@@ -297,33 +297,17 @@ FPNGTexture::FPNGTexture (FileReader &lump, int lumpnum, const FString &filename
 	case 0:		// Grayscale
 		if (!bAlphaTexture)
 		{
-			BYTE *GrayMapSrc;
-			switch(BitDepth)
-			{
-				default:
-					GrayMapSrc = GrayMap;
-					break;
-				case 4:
-					GrayMapSrc = GrayMap4bit;
-					break;
-				case 2:
-					GrayMapSrc = GrayMap2bit;
-					break;
-				case 1:
-					GrayMapSrc = GrayMap1bit;
-					break;
-			}
 			if (colortype == 0 && havetRNS && trans[0] != 0)
 			{
 				bMasked = true;
-				PaletteSize = 1<<BitDepth;
-				PaletteMap = new BYTE[PaletteSize];
-				memcpy (PaletteMap, GrayMapSrc, 256);
+				PaletteSize = 256;
+				PaletteMap = new BYTE[256];
+				memcpy (PaletteMap, GrayMap, 256);
 				PaletteMap[trans[0]] = 0;
 			}
 			else
 			{
-				PaletteMap = GrayMapSrc;
+				PaletteMap = GrayMap;
 			}
 		}
 		break;