/// <summary>
/// Loads the image.
/// </summary>
private void LoadImage()
{
for (int i = 0; i < PNGID.Length; i++)
{
if (PNGID[i] != this.stream.ReadByte())
{
throw new PdfUnrecognizedImageFormatException("File is not a valid PNG.");
}
}
byte[] buffer = new byte[0x1000];
while (true)
{
int @int = GetInt(this.stream);
string s = GetString(this.stream);
if ((@int < 0) || !CheckMarker(s))
{
throw new PdfUnrecognizedImageFormatException("Corrupted PNG file.");
}
if ("IDAT".Equals(s))
{
while (@int != 0)
{
int count = this.stream.Read(buffer, 0, Math.Min(@int, 0x1000));
if (count <= 0)
{
return;
}
this.idat.Write(buffer, 0, count);
@int -= count;
}
}
else if (!"tRNS".Equals(s))
{
if ("IHDR".Equals(s))
{
this.width = GetInt(this.stream);
this.height = GetInt(this.stream);
this.bitDepth = this.stream.ReadByte();
this.colorType = this.stream.ReadByte();
this.stream.ReadByte();
this.stream.ReadByte();
this.interlaceMethod = this.stream.ReadByte();
}
else if ("PLTE".Equals(s))
{
if (this.colorType == 3)
{
List <byte> list = new List <byte>();
while (@int-- > 0)
{
list.Add((byte)this.stream.ReadByte());
}
list.ToArray();
PdfIndexedColorSpace space = new PdfIndexedColorSpace(this.GetColorspace(), (@int / 3) - 1, list.ToArray());
this.properties.Add(PdfName.ColorSpace, space);
}
else
{
Image.Skip(this.stream, @int);
}
}
else if ("pHYs".Equals(s))
{
int num9 = GetInt(this.stream);
int num10 = GetInt(this.stream);
if (this.stream.ReadByte() == 1)
{
this.dpiX = (int)((num9 * 0.0254f) + 0.5f);
this.dpiY = (int)((num10 * 0.0254f) + 0.5f);
}
else if (num10 != 0)
{
this.XYRatio = ((float)num9) / ((float)num10);
}
}
else if ("cHRM".Equals(s))
{
this.xW = ((float)GetInt(this.stream)) / 100000f;
this.yW = ((float)GetInt(this.stream)) / 100000f;
this.xR = ((float)GetInt(this.stream)) / 100000f;
this.yR = ((float)GetInt(this.stream)) / 100000f;
this.xG = ((float)GetInt(this.stream)) / 100000f;
this.yG = ((float)GetInt(this.stream)) / 100000f;
this.xB = ((float)GetInt(this.stream)) / 100000f;
this.yB = ((float)GetInt(this.stream)) / 100000f;
this.hasCHRM = ((((Math.Abs(this.xW) >= 0.0001f) && (Math.Abs(this.yW) >= 0.0001f)) && ((Math.Abs(this.xR) >= 0.0001f) && (Math.Abs(this.yR) >= 0.0001f))) && (((Math.Abs(this.xG) >= 0.0001f) && (Math.Abs(this.yG) >= 0.0001f)) && (Math.Abs(this.xB) >= 0.0001f))) && (Math.Abs(this.yB) >= 0.0001f);
}
else if ("sRGB".Equals(s))
{
int index = this.stream.ReadByte();
this.intent = intents[index];
this.gamma = 2.2f;
this.xW = 0.3127f;
this.yW = 0.329f;
this.xR = 0.64f;
this.yR = 0.33f;
this.xG = 0.3f;
this.yG = 0.6f;
this.xB = 0.15f;
this.yB = 0.06f;
this.hasCHRM = true;
}
else if ("gAMA".Equals(s))
{
int num13 = GetInt(this.stream);
if (num13 != 0)
{
this.gamma = 100000f / ((float)num13);
if (!this.hasCHRM)
{
this.xW = 0.3127f;
this.yW = 0.329f;
this.xR = 0.64f;
this.yR = 0.33f;
this.xG = 0.3f;
this.yG = 0.6f;
this.xB = 0.15f;
this.yB = 0.06f;
this.hasCHRM = true;
}
}
}
else if (!"iCCP".Equals(s))
{
if ("IEND".Equals(s))
{
return;
}
Image.Skip(this.stream, @int);
}
}
else
{
switch (this.colorType)
{
case 0:
if (@int >= 2)
{
@int -= 2;
int word = GetWord(this.stream);
if (this.bitDepth != 0x10)
{
this.properties.Add(PdfName.Mask, PdfArray.Convert(new int[] { word, word }));
break;
}
this.transRedGray = word;
}
break;
case 2:
if (@int >= 6)
{
@int -= 6;
int num5 = GetWord(this.stream);
int num6 = GetWord(this.stream);
int num7 = GetWord(this.stream);
if (this.bitDepth != 0x10)
{
this.properties.Add(PdfName.Mask, PdfArray.Convert(new int[] { num5, num5, num6, num6, num7, num7 }));
break;
}
this.transRedGray = num5;
this.transGreen = num6;
this.transBlue = num7;
}
break;
case 3:
if (@int > 0)
{
this.trans = new byte[@int];
for (int j = 0; j < @int; j++)
{
this.trans[j] = (byte)this.stream.ReadByte();
}
@int = 0;
}
break;
}
Image.Skip(this.stream, @int);
}
Image.Skip(this.stream, 4);
}
}
/// <summary>
/// Loads the image.
/// </summary>
private void LoadImage()
{
base.type = ImageType.JPEG2000;
this.inp = null;
try
{
this.inp = new MemoryStream(base.rawData);
this.boxLength = this.Cio_read(4);
if (this.boxLength == 12)
{
this.boxType = this.Cio_read(4);
if (0x6a502020 != this.boxType)
{
throw new PdfUnrecognizedImageFormatException("Expected JP Marker");
}
if (0xd0a870a != this.Cio_read(4))
{
throw new PdfUnrecognizedImageFormatException("Error with JP Marker");
}
this.Jp2_read_boxhdr();
if (0x66747970 != this.boxType)
{
throw new PdfUnrecognizedImageFormatException("Expected FTYP Marker");
}
Image.Skip(this.inp, this.boxLength - 8);
this.Jp2_read_boxhdr();
do
{
if (0x6a703268 != this.boxType)
{
if (this.boxType == 0x6a703263)
{
throw new PdfUnrecognizedImageFormatException("Expected JP2H Marker");
}
Image.Skip(this.inp, this.boxLength - 8);
this.Jp2_read_boxhdr();
}
}while (0x6a703268 != this.boxType);
this.Jp2_read_boxhdr();
if (0x69686472 != this.boxType)
{
throw new PdfUnrecognizedImageFormatException("Expected IHDR Marker");
}
base.height = this.Cio_read(4);
base.width = this.Cio_read(4);
base.bpc = -1;
}
else
{
if (this.boxLength != -11534511)
{
throw new PdfUnrecognizedImageFormatException("Not a valid Jpeg2000 file");
}
Image.Skip(this.inp, 4);
int num = this.Cio_read(4);
int num2 = this.Cio_read(4);
int num3 = this.Cio_read(4);
int num4 = this.Cio_read(4);
Image.Skip(this.inp, 0x10);
base.colorspace = this.Cio_read(2);
base.bpc = 8;
base.height = num2 - num4;
base.width = num - num3;
}
}
finally
{
if (this.inp != null)
{
try
{
this.inp.Dispose();
}
catch
{
}
this.inp = null;
}
}
}
/// <summary>
/// Gets the image parameters such as width, height, and colorspace.
/// </summary>
/// <param name="istr">Input image stream</param>
/// <returns>ImageParameters structure contains image details</returns>
protected void LoadImage(Stream istr)
{
base.type = ImageType.JPEG;
base.bpc = 8;
bool flag = true;
while (true)
{
int @short;
while (istr.ReadByte() != 0xff)
{
}
int marker = istr.ReadByte();
if (!flag || (marker != 0xe0))
{
if (marker == 0xee)
{
@short = GetShort(istr);
byte[] bytes = new byte[@short];
for (int i = 0; i < @short; i++)
{
bytes[i] = (byte)istr.ReadByte();
}
if (bytes.Length > 12)
{
if (PdfASCIIEncoding.Instance.GetString(bytes, 0, 5).ToLower() != "adobe")
{
throw new PdfUnrecognizedImageFormatException("Not a supported Jpeg File.");
}
do
{
if (istr.ReadByte() == 0xff)
{
marker = istr.ReadByte();
}
}while (MarkerType(marker) != 0);
}
}
flag = false;
int num6 = MarkerType(marker);
switch (num6)
{
case 0:
Image.Skip(istr, 2);
if (istr.ReadByte() != 8)
{
throw new PdfUnrecognizedImageFormatException("Must have 8 bits per component.");
}
base.height = GetShort(istr);
base.width = GetShort(istr);
base.colorspace = (byte)istr.ReadByte();
return;
case 1:
throw new PdfUnrecognizedImageFormatException("Unsupported JPEG marker: " + ((int)marker));
}
if (num6 != 2)
{
Image.Skip(istr, GetShort(istr) - 2);
}
}
else
{
flag = false;
@short = GetShort(istr);
if (@short < 0x10)
{
Image.Skip(istr, @short - 2);
}
else
{
byte[] buffer = new byte[JFIF_ID.Length];
if (istr.Read(buffer, 0, buffer.Length) != buffer.Length)
{
throw new PdfUnrecognizedImageFormatException("Corrupted JFIF marker.");
}
bool flag2 = true;
for (int j = 0; j < buffer.Length; j++)
{
if (buffer[j] != JFIF_ID[j])
{
flag2 = false;
break;
}
}
if (!flag2)
{
Image.Skip(istr, (@short - 2) - buffer.Length);
}
else
{
Image.Skip(istr, 2);
Image.Skip(istr, ((@short - 2) - buffer.Length) - 7);
}
}
}
}
}
