internal static void GetFontData(Font font, Stream inputStream)
{
int len = inputStream.ReadByte();
byte[] fontName = new byte[len];
inputStream.Read(fontName, 0, len);
font.name = System.Text.Encoding.UTF8.GetString(fontName, 0, len);
len = GetInt24(inputStream);
byte[] fontInfo = new byte[len];
inputStream.Read(fontInfo, 0, len);
font.info = System.Text.Encoding.UTF8.GetString(fontInfo, 0, len);
byte[] buf = new byte[GetInt32(inputStream)];
inputStream.Read(buf, 0, buf.Length);
MemoryStream stream = new MemoryStream(Decompressor.inflate(buf));
font.unitsPerEm = GetInt32(stream);
font.bBoxLLx = GetInt32(stream);
font.bBoxLLy = GetInt32(stream);
font.bBoxURx = GetInt32(stream);
font.bBoxURy = GetInt32(stream);
font.fontAscent = GetInt32(stream);
font.fontDescent = GetInt32(stream);
font.firstChar = GetInt32(stream);
font.lastChar = GetInt32(stream);
font.capHeight = GetInt32(stream);
font.fontUnderlinePosition = GetInt32(stream);
font.fontUnderlineThickness = GetInt32(stream);
len = GetInt32(stream);
font.advanceWidth = new int[len];
for (int i = 0; i < len; i++)
{
font.advanceWidth[i] = GetInt16(stream);
}
len = GetInt32(stream);
font.glyphWidth = new int[len];
for (int i = 0; i < len; i++)
{
font.glyphWidth[i] = GetInt16(stream);
}
len = GetInt32(stream);
font.unicodeToGID = new int[len];
for (int i = 0; i < len; i++)
{
font.unicodeToGID[i] = GetInt16(stream);
}
font.cff = (inputStream.ReadByte() == 'Y') ? true : false;
font.uncompressedSize = GetInt32(inputStream);
font.compressedSize = GetInt32(inputStream);
}
internal void SetStreamAndData(byte[] buf, int length)
{
if (this.stream == null)
{
this.stream = new byte[length];
Array.Copy(buf, streamOffset, stream, 0, length);
if (GetValue("/Filter").Equals("/FlateDecode"))
{
this.data = Decompressor.inflate(stream);
}
else
{
// Assume no compression for now.
// In the future we may handle LZW decompression ...
this.data = stream;
}
}
}
/**
* Used to embed PNG images in the PDF document.
*
*/
public PNGImage(Stream inputStream)
{
ValidatePNG(inputStream);
List <Chunk> chunks = ProcessPNG(inputStream);
for (int i = 0; i < chunks.Count; i++)
{
Chunk chunk = chunks[i];
String chunkType = System.Text.Encoding.UTF8.GetString(chunk.type);
if (chunkType.Equals("IHDR"))
{
this.w = (int)ToUInt32(chunk.GetData(), 0); // Width
this.h = (int)ToUInt32(chunk.GetData(), 4); // Height
this.bitDepth = chunk.GetData()[8]; // Bit Depth
this.colorType = chunk.GetData()[9]; // Color Type
// Console.WriteLine(
// "Bit Depth == " + chunk.GetData()[8]);
// Console.WriteLine(
// "Color Type == " + chunk.GetData()[9]);
// Console.WriteLine(chunk.GetData()[10]);
// Console.WriteLine(chunk.GetData()[11]);
// Console.WriteLine(chunk.GetData()[12]);
if (chunk.GetData()[12] == 1)
{
Console.WriteLine("Interlaced PNG images are not supported.");
Console.WriteLine("Convert the image using OptiPNG:\noptipng -i0 -o7 myimage.png\n");
}
}
else if (chunkType.Equals("IDAT"))
{
iDAT = AppendIdatChunk(iDAT, chunk.GetData());
}
else if (chunkType.Equals("PLTE"))
{
pLTE = chunk.GetData();
if (pLTE.Length % 3 != 0)
{
throw new Exception("Incorrect palette length.");
}
}
else if (chunkType.Equals("gAMA"))
{
// TODO:
// Console.WriteLine("gAMA chunk found!");
}
else if (chunkType.Equals("tRNS"))
{
// Console.WriteLine("tRNS chunk found!");
if (colorType == 3)
{
tRNS = chunk.GetData();
}
}
else if (chunkType.Equals("cHRM"))
{
// TODO:
// Console.WriteLine("cHRM chunk found!");
}
else if (chunkType.Equals("sBIT"))
{
// TODO:
// Console.WriteLine("sBIT chunk found!");
}
else if (chunkType.Equals("bKGD"))
{
// TODO:
// Console.WriteLine("bKGD chunk found!");
}
}
byte[] inflatedImageData = Decompressor.inflate(iDAT);
byte[] imageData;
if (colorType == 0)
{
// Grayscale Image
if (bitDepth == 16)
{
imageData = GetImageColorType0BitDepth16(inflatedImageData);
}
else if (bitDepth == 8)
{
imageData = GetImageColorType0BitDepth8(inflatedImageData);
}
else if (bitDepth == 4)
{
imageData = GetImageColorType0BitDepth4(inflatedImageData);
}
else if (bitDepth == 2)
{
imageData = GetImageColorType0BitDepth2(inflatedImageData);
}
else if (bitDepth == 1)
{
imageData = GetImageColorType0BitDepth1(inflatedImageData);
}
else
{
throw new Exception("Image with unsupported bit depth == " + bitDepth);
}
}
else if (colorType == 6)
{
if (bitDepth == 8)
{
imageData = GetImageColorType6BitDepth8(inflatedImageData);
}
else
{
throw new Exception("Image with unsupported bit depth == " + bitDepth);
}
}
else
{
// Color Image
if (pLTE == null)
{
// Trucolor Image
if (bitDepth == 16)
{
imageData = GetImageColorType2BitDepth16(inflatedImageData);
}
else
{
imageData = GetImageColorType2BitDepth8(inflatedImageData);
}
}
else
{
// Indexed Image
if (bitDepth == 8)
{
imageData = GetImageColorType3BitDepth8(inflatedImageData);
}
else if (bitDepth == 4)
{
imageData = GetImageColorType3BitDepth4(inflatedImageData);
}
else if (bitDepth == 2)
{
imageData = GetImageColorType3BitDepth2(inflatedImageData);
}
else if (bitDepth == 1)
{
imageData = GetImageColorType3BitDepth1(inflatedImageData);
}
else
{
throw new Exception("Image with unsupported bit depth == " + bitDepth);
}
}
}
deflatedImageData = Compressor.deflate(imageData);
}