public void Deserialise(System.IO.Stream inStr, int xiExpectedDataSize)
{
long lStartOffset = xiExpectedDataSize >= 0 ? inStr.Position : -1;
// magic number
BinaryReader bin = new BinaryReader(inStr);
int lTIMMagicNumber = bin.ReadInt32();
if (TIM_MAGIC_NUMBER != lTIMMagicNumber)
{
throw new DeserialisationException(string.Format("TIM should start with 4 byte magic number 0x10, found 0x{0:x}", lTIMMagicNumber), inStr.Position - 4);
}
// bits per pixel
BPP = (TimBPP)bin.ReadInt32();
if (BPP != TimBPP._4BPP
&& BPP != TimBPP._8BPP
&& BPP != TimBPP._16BPP)
{
throw new TIMTypeNotImplementedException(string.Format("Only 4BPP, 8BPP or 16BPP TIMs are supported. Found 0x{0:x} BPP type", BPP), inStr.Position - 8);
}
if (BPP != TimBPP._16BPP)
{
// Now the palette header:
ClutSize = bin.ReadInt32();
PaletteOrgX = bin.ReadInt16();
PaletteOrgY = bin.ReadInt16();
ClutColors = bin.ReadInt16();
ClutCount = bin.ReadInt16();
//sanity checks
if (ClutCount * ClutColors * 2 != ClutSize - 12)
throw new DeserialisationException("bad TIM: ClutCount*ClutColors*2 != ClutSize - 12", inStr.Position);
//TODO:
if (ClutCount != 1)
throw new DeserialisationException("Multi-clut TIMs are not yet supported. Please extend TIMChunk.cs using info from timgfx.txt");
//CLUT:
Palette = new short[ClutCount * ClutColors];
for (int i = 0; i < Palette.Length; i++)
{
Palette[i] = bin.ReadInt16();
}
}
//colour count
int lPixelsPerTwoBytes;
switch (BPP)
{
case TimBPP._4BPP:
if (ClutColors != 16) throw new DeserialisationException("bad TIM: ClutColors != 16, but BPP == 4", inStr.Position);
lPixelsPerTwoBytes = 4;
break;
case TimBPP._8BPP:
if (ClutColors != 256) throw new DeserialisationException("bad TIM: ClutColors != 256, but BPP == 8", inStr.Position);
lPixelsPerTwoBytes = 2;
break;
case TimBPP._16BPP:
if (ClutColors != 0) throw new DeserialisationException("bad TIM: ClutColors != 0, but BPP == 16", inStr.Position);
lPixelsPerTwoBytes = 1;
break;
default: throw new Exception("unreachable case");
}
//Second header:
ImageDataSize = bin.ReadInt32();
ImageOrgX = bin.ReadInt16();
ImageOrgY = bin.ReadInt16();
//short * short is int !?!
ImageWidth = (short)(lPixelsPerTwoBytes * bin.ReadInt16());
ImageHeight = bin.ReadInt16();
//sanity checks
//some observed TIMs fail this check:
if (ImageWidth * ImageHeight / lPixelsPerTwoBytes * 2 != ImageDataSize - 12)
{
//throw new DeserialisationException
System.Diagnostics.Trace.WriteLine(string.Format("bad TIM: ImageWidth * ImageHeight / PixelsPerByte != ImageDataSize - 12, near {0}", inStr.Position));
}
//read the image data
ImageData = bin.ReadBytes(ImageWidth * ImageHeight / lPixelsPerTwoBytes * 2);
if (xiExpectedDataSize >= 0)
{
long lObservedSize = inStr.Position - lStartOffset;
if (lObservedSize < xiExpectedDataSize)
{
ZeroPadding = bin.ReadBytes((int)(xiExpectedDataSize - lObservedSize));
foreach (byte b in ZeroPadding)
if (b != 0)
throw new DeserialisationException(string.Format("Non zero value found in zero-padding section: {0}", b), inStr.Position);
}
else if (lObservedSize > xiExpectedDataSize)
{
throw new DeserialisationException(string.Format("Expected TIM datasize was {0}, found {1}", xiExpectedDataSize, lObservedSize));
}
}
}
public void Deserialise(System.IO.Stream inStr, int xiExpectedDataSize)
{
long lStartOffset = xiExpectedDataSize >= 0 ? inStr.Position : -1;
// magic number
BinaryReader bin = new BinaryReader(inStr);
int lTIMMagicNumber = bin.ReadInt32();
if (TIM_MAGIC_NUMBER != lTIMMagicNumber)
{
throw new DeserialisationException(string.Format("TIM should start with 4 byte magic number 0x10, found 0x{0:x}", lTIMMagicNumber), inStr.Position - 4);
}
// bits per pixel
BPP = (TimBPP)bin.ReadInt32();
if (BPP != TimBPP._4BPP &&
BPP != TimBPP._8BPP &&
BPP != TimBPP._16BPP)
{
throw new TIMTypeNotImplementedException(string.Format("Only 4BPP, 8BPP or 16BPP TIMs are supported. Found 0x{0:x} BPP type", BPP), inStr.Position - 8);
}
if (BPP != TimBPP._16BPP)
{
// Now the palette header:
ClutSize = bin.ReadInt32();
PaletteOrgX = bin.ReadInt16();
PaletteOrgY = bin.ReadInt16();
ClutColors = bin.ReadInt16();
ClutCount = bin.ReadInt16();
//sanity checks
if (ClutCount * ClutColors * 2 != ClutSize - 12)
{
throw new DeserialisationException("bad TIM: ClutCount*ClutColors*2 != ClutSize - 12", inStr.Position);
}
//TODO:
if (ClutCount != 1)
{
throw new DeserialisationException("Multi-clut TIMs are not yet supported. Please extend TIMChunk.cs using info from timgfx.txt");
}
//CLUT:
Palette = new short[ClutCount * ClutColors];
for (int i = 0; i < Palette.Length; i++)
{
Palette[i] = bin.ReadInt16();
}
}
//colour count
int lPixelsPerTwoBytes;
switch (BPP)
{
case TimBPP._4BPP:
if (ClutColors != 16)
{
throw new DeserialisationException("bad TIM: ClutColors != 16, but BPP == 4", inStr.Position);
}
lPixelsPerTwoBytes = 4;
break;
case TimBPP._8BPP:
if (ClutColors != 256)
{
throw new DeserialisationException("bad TIM: ClutColors != 256, but BPP == 8", inStr.Position);
}
lPixelsPerTwoBytes = 2;
break;
case TimBPP._16BPP:
if (ClutColors != 0)
{
throw new DeserialisationException("bad TIM: ClutColors != 0, but BPP == 16", inStr.Position);
}
lPixelsPerTwoBytes = 1;
break;
default: throw new Exception("unreachable case");
}
//Second header:
ImageDataSize = bin.ReadInt32();
ImageOrgX = bin.ReadInt16();
ImageOrgY = bin.ReadInt16();
//short * short is int !?!
ImageWidth = (short)(lPixelsPerTwoBytes * bin.ReadInt16());
ImageHeight = bin.ReadInt16();
//sanity checks
//some observed TIMs fail this check:
if (ImageWidth * ImageHeight / lPixelsPerTwoBytes * 2 != ImageDataSize - 12)
{
//throw new DeserialisationException
System.Diagnostics.Trace.WriteLine(string.Format("bad TIM: ImageWidth * ImageHeight / PixelsPerByte != ImageDataSize - 12, near {0}", inStr.Position));
}
//read the image data
ImageData = bin.ReadBytes(ImageWidth * ImageHeight / lPixelsPerTwoBytes * 2);
if (xiExpectedDataSize >= 0)
{
long lObservedSize = inStr.Position - lStartOffset;
if (lObservedSize < xiExpectedDataSize)
{
ZeroPadding = bin.ReadBytes((int)(xiExpectedDataSize - lObservedSize));
foreach (byte b in ZeroPadding)
{
if (b != 0)
{
throw new DeserialisationException(string.Format("Non zero value found in zero-padding section: {0}", b), inStr.Position);
}
}
}
else if (lObservedSize > xiExpectedDataSize)
{
throw new DeserialisationException(string.Format("Expected TIM datasize was {0}, found {1}", xiExpectedDataSize, lObservedSize));
}
}
}
