private Bitmap CreateBitmap(FruaTlbImage image, BinaryReader reader)
{
var pixelsToRead = image.Header.ImageHeight * image.Header.ImageWidth;
var buffer = new byte[pixelsToRead];
buffer = reader.ReadBytes(pixelsToRead);
buffer = DeinterlacePixels(buffer);
return(CreateBitmapFromBuffer(image, buffer));
}
private Bitmap CreateBitmapFromBuffer(FruaTlbImage image, byte[] buffer)
{
var bitmap = new Bitmap(image.Header.ImageWidth, image.Header.ImageHeight);
for (int y = 0; y < image.Header.ImageHeight; y++)
{
for (int x = 0; x < image.Header.ImageWidth; x++)
{
var pixelIndex = buffer[y * image.Header.ImageWidth + x];
bitmap.SetPixel(x, y, _colorTable.Palette[pixelIndex]);
}
}
return(bitmap);
}
// TODO not working right yet
private void CreateBitmap23(FruaTlbImage image, BinaryReader reader)
{
var buffer = new byte[image.Header.ImageHeight * image.Header.ImageWidth];
var rowsToPlot = image.Header.ImageHeight;
var row = 0;
var pos = 0;
while (row < rowsToPlot)
{
var value = reader.ReadByte();
if (value == 0)
{
row++;
pos = 0;
}
else
{
if (value >= 128)
{
var x = (257 - value) * 4;
pos += x;
}
else
{
for (int i = 0; i < value; i++)
{
var pixel = reader.ReadByte();
buffer[row * image.Header.ImageWidth + pos] = pixel;
// pos += 4; ??
}
}
}
}
var bitmap = CreateBitmapFromBuffer(image, buffer);
Bitmaps.Add(bitmap);
}
private void ReadTileLibrary(BinaryReader reader, int imageCount, uint startingPointForSeek)
{
_offsets.Clear();
for (int i = 0; i < imageCount; i++)
{
var offset = reader.ReadUInt32();
_offsets.Add(offset);
}
ReadColorTable(reader, startingPointForSeek);
// read images
for (var entry = 0; entry < imageCount; entry++)
{
var offset = _offsets[entry];
reader.BaseStream.Seek(offset + startingPointForSeek, SeekOrigin.Begin);
var image = new FruaTlbImage
{
Header =
{
ImageHeight = reader.ReadUInt16(),
VerticalOffset = reader.ReadInt16(),
HorizontalOffset = reader.ReadInt16(),
ImageWidth = reader.ReadByte()*4,
DrawingMethod = reader.ReadByte()
}
};
// read image if we can
switch (image.Header.DrawingMethod)
{
case 16:
CreateBitmap16(image, reader);
break;
case 17:
CreateBitmap17(image, reader);
break;
case 18:
CreateBitmap18(image, reader);
break;
case 21:
CreateBitmap21(image, reader);
break;
case 23:
// TODO not working right yet
//CreateBitmap23(image, reader);
break;
case 24:
// TODO don't know how to read this yet
break;
case 25:
// TODO don't know how to read this yet
break;
default:
throw new Exception(string.Format("Unknown Drawing Method \"{0}\"", image.Header.DrawingMethod));
}
_images.Add(image);
}
}
private Bitmap CreateBitmapFromBuffer(FruaTlbImage image, byte[] buffer)
{
var bitmap = new Bitmap(image.Header.ImageWidth, image.Header.ImageHeight);
for (int y = 0; y < image.Header.ImageHeight; y++)
{
for (int x = 0; x < image.Header.ImageWidth; x++)
{
var pixelIndex = buffer[y*image.Header.ImageWidth + x];
bitmap.SetPixel(x, y, _colorTable.Palette[pixelIndex]);
}
}
return bitmap;
}
private Bitmap CreateBitmap(FruaTlbImage image, BinaryReader reader)
{
var pixelsToRead = image.Header.ImageHeight*image.Header.ImageWidth;
var buffer = new byte[pixelsToRead];
buffer = reader.ReadBytes(pixelsToRead);
buffer = DeinterlacePixels(buffer);
return CreateBitmapFromBuffer(image, buffer);
}
// TODO not working right yet
private void CreateBitmap23(FruaTlbImage image, BinaryReader reader)
{
var buffer = new byte[image.Header.ImageHeight*image.Header.ImageWidth];
var rowsToPlot = image.Header.ImageHeight;
var row = 0;
var pos = 0;
while (row < rowsToPlot)
{
var value = reader.ReadByte();
if (value == 0)
{
row++;
pos = 0;
}
else
{
if (value >= 128)
{
var x = (257 - value)*4;
pos += x;
}
else
{
for (int i = 0; i < value; i++)
{
var pixel = reader.ReadByte();
buffer[row*image.Header.ImageWidth+pos] = pixel;
// pos += 4; ??
}
}
}
}
var bitmap = CreateBitmapFromBuffer(image, buffer);
Bitmaps.Add(bitmap);
}
/// <summary>
/// Uncompressed, transparent
/// In transparent images, color 255 is not drawn to the screen
/// </summary>
/// <param name="image"></param>
/// <param name="reader"></param>
private void CreateBitmap21(FruaTlbImage image, BinaryReader reader)
{
var bitmap = CreateBitmap(image, reader);
Bitmaps.Add(bitmap);
}
private void CreateBitmap18(FruaTlbImage image, BinaryReader reader)
{
var targetPixelCountToPlot = image.Header.ImageWidth*image.Header.ImageHeight;
var width = image.Header.ImageWidth;
var actualPixelsPlotted = 0;
var pixels = new byte[targetPixelCountToPlot];
var screenOffset = 0;
var runCount = 0;
while (actualPixelsPlotted < targetPixelCountToPlot)
{
// figure out how many pixels are represented by run
var x = reader.ReadByte();
if (x < 128)
{
// run of non-consecutive colours
var length = x + 1;
for (int i = 0; i < length; i++)
{
var value = reader.ReadByte();
pixels[screenOffset] = value;
screenOffset += 4;
if (screenOffset >= width)
{
runCount++;
screenOffset = runCount;
}
actualPixelsPlotted++;
}
}
else
{
// run of consecutive colours
var value = reader.ReadByte();
var length = 257 - x;
for (var i = 0; i < length; i++)
{
pixels[screenOffset] = value;
screenOffset += 4;
if (screenOffset >= width)
{
runCount++;
screenOffset = runCount;
}
actualPixelsPlotted++;
}
}
}
/*
var buffer = new byte[pixels.Length];
var count = 0;
for (int y = 0; y < image.Header.ImageHeight; y++)
{
for (int i = 0; i < 4; i++)
{
var offset = 0;
for (int w = 0; w < width / 4; w++)
{
offset = offset + i*width/4;
var value = pixels[offset];
buffer[count++] = value;
offset += 4;
}
}
}
*/
var bitmap = CreateBitmapFromBuffer(image, pixels);
Bitmaps.Add(bitmap);
}
private void ReadTileLibrary(BinaryReader reader, int imageCount, uint startingPointForSeek)
{
_offsets.Clear();
for (int i = 0; i < imageCount; i++)
{
var offset = reader.ReadUInt32();
_offsets.Add(offset);
}
ReadColorTable(reader, startingPointForSeek);
// read images
for (var entry = 0; entry < imageCount; entry++)
{
var offset = _offsets[entry];
reader.BaseStream.Seek(offset + startingPointForSeek, SeekOrigin.Begin);
var image = new FruaTlbImage
{
Header =
{
ImageHeight = reader.ReadUInt16(),
VerticalOffset = reader.ReadInt16(),
HorizontalOffset = reader.ReadInt16(),
ImageWidth = reader.ReadByte() * 4,
DrawingMethod = reader.ReadByte()
}
};
// read image if we can
switch (image.Header.DrawingMethod)
{
case 16:
CreateBitmap16(image, reader);
break;
case 17:
CreateBitmap17(image, reader);
break;
case 18:
CreateBitmap18(image, reader);
break;
case 21:
CreateBitmap21(image, reader);
break;
case 23:
// TODO not working right yet
//CreateBitmap23(image, reader);
break;
case 24:
// TODO don't know how to read this yet
break;
case 25:
// TODO don't know how to read this yet
break;
default:
throw new Exception(string.Format("Unknown Drawing Method \"{0}\"", image.Header.DrawingMethod));
}
_images.Add(image);
}
}
/// <summary>
/// Uncompressed, transparent
/// In transparent images, color 255 is not drawn to the screen
/// </summary>
/// <param name="image"></param>
/// <param name="reader"></param>
private void CreateBitmap21(FruaTlbImage image, BinaryReader reader)
{
var bitmap = CreateBitmap(image, reader);
Bitmaps.Add(bitmap);
}
private void CreateBitmap18(FruaTlbImage image, BinaryReader reader)
{
var targetPixelCountToPlot = image.Header.ImageWidth * image.Header.ImageHeight;
var width = image.Header.ImageWidth;
var actualPixelsPlotted = 0;
var pixels = new byte[targetPixelCountToPlot];
var screenOffset = 0;
var runCount = 0;
while (actualPixelsPlotted < targetPixelCountToPlot)
{
// figure out how many pixels are represented by run
var x = reader.ReadByte();
if (x < 128)
{
// run of non-consecutive colours
var length = x + 1;
for (int i = 0; i < length; i++)
{
var value = reader.ReadByte();
pixels[screenOffset] = value;
screenOffset += 4;
if (screenOffset >= width)
{
runCount++;
screenOffset = runCount;
}
actualPixelsPlotted++;
}
}
else
{
// run of consecutive colours
var value = reader.ReadByte();
var length = 257 - x;
for (var i = 0; i < length; i++)
{
pixels[screenOffset] = value;
screenOffset += 4;
if (screenOffset >= width)
{
runCount++;
screenOffset = runCount;
}
actualPixelsPlotted++;
}
}
}
/*
* var buffer = new byte[pixels.Length];
* var count = 0;
* for (int y = 0; y < image.Header.ImageHeight; y++)
* {
* for (int i = 0; i < 4; i++)
* {
* var offset = 0;
* for (int w = 0; w < width / 4; w++)
* {
* offset = offset + i*width/4;
* var value = pixels[offset];
* buffer[count++] = value;
* offset += 4;
* }
* }
* }
*/
var bitmap = CreateBitmapFromBuffer(image, pixels);
Bitmaps.Add(bitmap);
}