public TPdfImage(TImage aImage, int aId, Stream aImageData, long transparentColor, bool defaultToJpg)
{
Id = aId;
FMask = null;
FSMask = null;
FTransparentColor = transparentColor;
if (aImageData != null && TPdfPng.IsOkPng(aImageData))
{
aImageData.Position = 0;
ReadPng(aImageData);
}
else
{
TImage NewImage = aImage;
try
{
if (aImage == null && aImageData != null)
{
NewImage = TImage.FromStream(aImageData);
}
//Convert to PNG / JPEG
if (defaultToJpg || NewImage.RawFormat.Equals(System.Drawing.Imaging.ImageFormat.Jpeg))
{
ReadJpeg(NewImage, aImageData);
}
else
{
ReadPng(NewImage);
}
}
finally
{
if (NewImage != null && NewImage != aImage)
{
NewImage.Dispose();
}
}
}
}
private void ReadPng(Stream Ms)
{
using (MemoryStream OutMs = new MemoryStream())
{
TPdfPngData ImgParsedData = new TPdfPngData(OutMs);
TPdfPng.ProcessPng(Ms, ImgParsedData);
FImage = OutMs.ToArray();
FImageWidth = (int)ImgParsedData.Width;
FImageHeight = (int)ImgParsedData.Height;
FBitsPerComponent = ImgParsedData.BitDepth;
if (FBitsPerComponent == 16)
{
PdfMessages.ThrowException(PdfErr.ErrInvalidPngImage);
}
int Colors = 1;
switch (ImgParsedData.ColorType)
{
case 0: //GrayScale
FColorSpace = TPdfTokens.GetString(TPdfToken.DeviceGrayName);
if (ImgParsedData.tRNS != null && ImgParsedData.tRNS.Length >= 2)
{
FMask =
TPdfTokens.GetString(TPdfToken.OpenArray) +
String.Format(CultureInfo.InvariantCulture, "{0} {0}", (ImgParsedData.tRNS[0] << 8) + ImgParsedData.tRNS[1]) +
TPdfTokens.GetString(TPdfToken.CloseArray);
}
break;
case 2: //TrueColor
FColorSpace = TPdfTokens.GetString(TPdfToken.DeviceRGBName);
Colors = 3;
if (ImgParsedData.tRNS != null && ImgParsedData.tRNS.Length >= 6)
{
FMask =
TPdfTokens.GetString(TPdfToken.OpenArray) +
String.Format(CultureInfo.InvariantCulture,
"{0} {0} {1} {1} {2} {2}", (ImgParsedData.tRNS[0] << 8) + ImgParsedData.tRNS[1],
(ImgParsedData.tRNS[2] << 8) + ImgParsedData.tRNS[3],
(ImgParsedData.tRNS[4] << 8) + ImgParsedData.tRNS[5]
) +
TPdfTokens.GetString(TPdfToken.CloseArray);
}
break;
case 3: //Indexed Color
FColorSpace = GetPalette(ImgParsedData.PLTE);
if (ImgParsedData.tRNS != null && ImgParsedData.tRNS.Length > 0)
{
ImgParsedData.SMask = TPdfPng.GetIndexedSMask(FImage, FImageWidth, FImageHeight, ImgParsedData.tRNS, FBitsPerComponent);
}
break;
case 4: //GrayScale + Alpha
FColorSpace = TPdfTokens.GetString(TPdfToken.DeviceGrayName);
break;
case 6: //TrueColor + Alpha
FColorSpace = TPdfTokens.GetString(TPdfToken.DeviceRGBName);
Colors = 3;
break;
default: PdfMessages.ThrowException(PdfErr.ErrInvalidPngImage); break;
}
FSMask = ImgParsedData.SMask;
OneBitMask = ImgParsedData.OneBitMask;
if (ImgParsedData.InterlaceMethod != 0)
{
PdfMessages.ThrowException(PdfErr.ErrInvalidPngImage);
}
FFilterName = TPdfTokens.GetString(TPdfToken.FlateDecodeName);
FDecodeParmsName =
TPdfTokens.GetString(TPdfToken.StartDictionary) +
String.Format(CultureInfo.InvariantCulture, TPdfTokens.GetString(TPdfToken.PredictorName) + " {0} ", 15) +
String.Format(CultureInfo.InvariantCulture, TPdfTokens.GetString(TPdfToken.ColorsName) + " {0} ", Colors) +
String.Format(CultureInfo.InvariantCulture, TPdfTokens.GetString(TPdfToken.BitsPerComponentName) + " {0} ", FBitsPerComponent) +
String.Format(CultureInfo.InvariantCulture, TPdfTokens.GetString(TPdfToken.ColumnsName) + " {0} ", FImageWidth) +
TPdfTokens.GetString(TPdfToken.EndDictionary);
FDecodeParmsSMask =
TPdfTokens.GetString(TPdfToken.StartDictionary) +
String.Format(CultureInfo.InvariantCulture, TPdfTokens.GetString(TPdfToken.PredictorName) + " {0} ", 15) +
String.Format(CultureInfo.InvariantCulture, TPdfTokens.GetString(TPdfToken.ColorsName) + " {0} ", 1) +
String.Format(CultureInfo.InvariantCulture, TPdfTokens.GetString(TPdfToken.BitsPerComponentName) + " {0} ", 8) +
String.Format(CultureInfo.InvariantCulture, TPdfTokens.GetString(TPdfToken.ColumnsName) + " {0} ", FImageWidth) +
TPdfTokens.GetString(TPdfToken.EndDictionary);
}
}
