/** <summary> Writes the graphics data. </summary> */
public void Write(BinaryWriter writer)
{
long startPosition = writer.BaseStream.Position;
for (int i = 0; i < imageDirectory.NumEntries; i++)
{
ImageEntry entry = imageDirectory.entries[i];
entry.StartAddress = (uint)(writer.BaseStream.Position - startPosition);
if (entry.Flags.HasFlag(ImageFlags.DirectBitmap))
{
if (!entry.Flags.HasFlag(ImageFlags.CompactedBitmap))
{
if (entry.Flags.HasFlag(ImageFlags.LandTile))
{
// Don't know what this flag does, but images can still be written normally.
}
PaletteImage paletteImage = this.paletteImages[i];
// Write each row
for (int y = 0; y < entry.Height; y++)
{
// Write each pixel in the row
for (int x = 0; x < entry.Width; x++)
{
writer.Write(paletteImage.Pixels[x, y]);
}
}
}
else
{
if (entry.Flags.HasFlag(ImageFlags.LandTile))
{
// Don't know what this flag does, but images can still be written normally.
}
PaletteImage paletteImage = this.paletteImages[i];
List <ScanLine> scanLines = new List <ScanLine>();
ushort[] rowOffsets = new ushort[entry.Height];
ushort rowOffset = (ushort)(entry.Height * 2);
// Write the scan lines in every row and figure out the scan line row offsets
for (int y = 0; y < (int)entry.Height; y++)
{
rowOffsets[y] = rowOffset;
ScanLine scanLine = new ScanLine();
scanLine.Row = (short)y;
// Continue until the next row
while ((scanLine.Count & 0x80) == 0x00)
{
// Reset the scan line count
scanLine.Count = 0;
// Find each scan line and then check if there's another one in the row
bool finishedScanLine = false;
bool lastScanLine = true;
for (int x = 0; x + (int)scanLine.Offset < (int)entry.Width; x++)
{
if (!finishedScanLine)
{
if (scanLine.Count == 0)
{
// If the scan line hasn't started yet, increment the offset
if (paletteImage.Pixels[x + scanLine.Offset, y] == 0x00)
{
scanLine.Offset++;
x--;
}
else
{
scanLine.Count = 1;
}
}
else if (paletteImage.Pixels[x + scanLine.Offset, y] == 0x00 || x == 0x7F)
{
// If the next pixel is transparent or the scan line is as big as possible, finish the line
finishedScanLine = true;
}
else
{
// Increment the scan line byte count
scanLine.Count++;
}
}
else if (paletteImage.Pixels[x + scanLine.Offset, y] != 0x00)
{
// There is another scan line after this
lastScanLine = false;
break;
}
}
// Set the end flag if the scan line is the last in the row
if (lastScanLine)
{
scanLine.Count |= 0x80;
}
// If the row has all transparent pixels, set the offset to 0
if (scanLine.Count == 0)
{
scanLine.Offset = 0;
scanLine.Count = 0;
}
rowOffset += (ushort)(2 + (scanLine.Count & 0x7F));
scanLines.Add(scanLine);
// Increment the scan line count
if (!lastScanLine)
{
scanLine.Offset += (byte)(scanLine.Count & 0x7F);
}
}
}
// Write the row offsets
for (int j = 0; j < entry.Height; j++)
{
writer.Write(rowOffsets[j]);
}
// Write the scan lines
for (int j = 0; j < scanLines.Count; j++)
{
writer.Write(scanLines[j].Count);
writer.Write(scanLines[j].Offset);
for (int k = 0; k < (int)(scanLines[j].Count & 0x7F); k++)
{
try {
writer.Write(paletteImage.Pixels[k + scanLines[j].Offset, scanLines[j].Row]);
}
catch (Exception) {
}
}
}
}
}
else if (entry.Flags.HasFlag(ImageFlags.PaletteEntries))
{
Palette palette = this.palettes[i];
// Write each color
for (int j = 0; j < entry.Width; j++)
{
// Yes, the colors are in the order blue, green, red
writer.Write(palette.Colors[j].B);
writer.Write(palette.Colors[j].G);
writer.Write(palette.Colors[j].R);
}
}
}
}
/** <summary> Reads the graphics data. </summary> */
public void Read(BinaryReader reader)
{
long startPosition = reader.BaseStream.Position;
for (int i = 0; i < imageDirectory.NumEntries; i++)
{
ImageEntry entry = imageDirectory.entries[i];
if (entry.Flags.HasFlag(ImageFlags.DirectBitmap))
{
if (!entry.Flags.HasFlag(ImageFlags.CompactedBitmap))
{
if (entry.Flags.HasFlag(ImageFlags.LandTile))
{
// Don't know what this flag does, but images can still be read normally.
}
PaletteImage paletteImage = new PaletteImage(entry);
reader.BaseStream.Position = startPosition + entry.StartAddress;
// Read each row
for (int y = 0; y < entry.Height; y++)
{
for (int x = 0; x < entry.Width; x++)
{
byte b = reader.ReadByte();
paletteImage.Pixels[x, y] = b;
}
}
this.paletteImages.Add(paletteImage);
this.palettes.Add(null);
this.numImages++;
}
else
{
if (entry.Flags.HasFlag(ImageFlags.LandTile))
{
// Don't know what this flag does, but images can still be read normally.
}
PaletteImage paletteImage = new PaletteImage(entry);
uint[] rowOffsets = new uint[entry.Height];
reader.BaseStream.Position = startPosition + entry.StartAddress;
// Read the row offsets
for (int j = 0; j < entry.Height; j++)
{
rowOffsets[j] = reader.ReadUInt16();
}
// Read the scan lines in each row
for (int j = 0; j < entry.Height; j++)
{
reader.BaseStream.Position = startPosition + entry.StartAddress + rowOffsets[j];
byte b1 = 0;
byte b2 = 0;
// A MSB of 1 means the last scan line in a row
while ((b1 & 0x80) == 0)
{
// Read the number of bytes of data
b1 = reader.ReadByte();
// Read the offset from the left edge of the image
b2 = reader.ReadByte();
for (int k = 0; k < (int)(b1 & 0x7F); k++)
{
byte b3 = reader.ReadByte();
paletteImage.Pixels[(int)b2 + k, j] = b3;
}
}
}
this.paletteImages.Add(paletteImage);
this.palettes.Add(null);
this.numImages++;
}
}
else if (entry.Flags.HasFlag(ImageFlags.PaletteEntries))
{
Palette palette = new Palette(entry);
reader.BaseStream.Position = startPosition + entry.StartAddress;
// Read each color
for (int j = 0; j < entry.Width; j++)
{
// Yes, the colors are in the order blue, green, red
byte blue = reader.ReadByte();
byte green = reader.ReadByte();
byte red = reader.ReadByte();
palette.Colors[j] = Color.FromArgb(red, green, blue);
}
this.paletteImages.Add(null);
this.palettes.Add(palette);
this.numPalettes++;
}
}
}