private void CreateImg(Stream OutStream, ImageFormat ImgFormat, ImageColorDepth Colors)
{
TImgExportInfo ExportInfo = null;
PixelFormat RgbPixFormat = Colors != ImageColorDepth.TrueColor ? PixelFormat.Format32bppPArgb : PixelFormat.Format24bppRgb;
PixelFormat PixFormat = PixelFormat.Format1bppIndexed;
switch (Colors)
{
case ImageColorDepth.TrueColor: PixFormat = RgbPixFormat; break;
case ImageColorDepth.Color256: PixFormat = PixelFormat.Format8bppIndexed; break;
}
using (Bitmap OutImg = CreateBitmap(Resolution, ref ExportInfo, PixFormat))
{
Bitmap ActualOutImg = Colors != ImageColorDepth.TrueColor? CreateBitmap(Resolution, ref ExportInfo, RgbPixFormat): OutImg;
try
{
using (Graphics Gr = Graphics.FromImage(ActualOutImg))
{
Gr.FillRectangle(Brushes.White, 0, 0, ActualOutImg.Width, ActualOutImg.Height); //Clear the background
ExportNext(Gr, ref ExportInfo);
}
if (Colors == ImageColorDepth.BlackAndWhite)
{
FloydSteinbergDither.ConvertToBlackAndWhite(ActualOutImg, OutImg);
}
else
if (Colors == ImageColorDepth.Color256)
{
OctreeQuantizer.ConvertTo256Colors(ActualOutImg, OutImg);
}
}
finally
{
if (ActualOutImg != OutImg)
{
ActualOutImg.Dispose();
}
}
OutImg.Save(OutStream, ImgFormat);
}
}
private TImgExportInfo ExportAllImagesButFirst(EncoderParameters ep, bool Is1bpp, TImgExportInfo ExportInfo, PixelFormat RgbPixFormat, Bitmap OutImg, ImageColorDepth ColorDepth)
{
if (ExportInfo == null)
{
ExportInfo = GetFirstPageExportInfo();
}
for (int i = ExportInfo.CurrentPage; i < ExportInfo.TotalPages; i++)
{
using (Bitmap TmpImg = CreateBitmap(Resolution, ref ExportInfo, RgbPixFormat))
{
using (Graphics Gr = Graphics.FromImage(TmpImg))
{
Gr.FillRectangle(Brushes.White, 0, 0, TmpImg.Width, TmpImg.Height); //Clear the background
ExportNext(Gr, ref ExportInfo);
if (Is1bpp)
{
using (Bitmap BwImg = FloydSteinbergDither.ConvertToBlackAndWhite(TmpImg))
{
OutImg.SaveAdd(BwImg, ep);
}
}
else
if (ColorDepth == ImageColorDepth.Color256)
{
using (Bitmap IndexImg = OctreeQuantizer.ConvertTo256Colors(TmpImg))
{
OutImg.SaveAdd(IndexImg, ep);
}
}
else
{
OutImg.SaveAdd(TmpImg, ep);
}
}
}
}
return(ExportInfo);
}
private void CreateMultiPageTiff(Stream OutStream, ImageColorDepth ColorDepth, ImageExportType ExportType)
{
ImageCodecInfo info = GetTiffEncoder();
int ParamCount = 1;
if (ExportType == ImageExportType.Fax || ExportType == ImageExportType.Fax4)
{
ParamCount++;
}
EncoderParameters ep = new EncoderParameters(ParamCount);
ep.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag, (long)EncoderValue.MultiFrame);
bool IsFax = false;
switch (ExportType)
{
case ImageExportType.Fax:
ep.Param[1] = new EncoderParameter(System.Drawing.Imaging.Encoder.Compression, (long)EncoderValue.CompressionCCITT3);
IsFax = true;
break;
case ImageExportType.Fax4:
ep.Param[1] = new EncoderParameter(System.Drawing.Imaging.Encoder.Compression, (long)EncoderValue.CompressionCCITT4);
IsFax = true;
break;
}
bool Is1bpp = IsFax || ColorDepth == ImageColorDepth.BlackAndWhite;
TImgExportInfo ExportInfo = null;
PixelFormat RgbPixFormat = IsFax || ColorDepth != ImageColorDepth.TrueColor ? PixelFormat.Format32bppPArgb : PixelFormat.Format24bppRgb;
PixelFormat PixFormat = PixelFormat.Format1bppIndexed;
if (!IsFax)
{
switch (ColorDepth)
{
case ImageColorDepth.TrueColor: PixFormat = RgbPixFormat; break;
case ImageColorDepth.Color256: PixFormat = PixelFormat.Format8bppIndexed; break;
}
}
using (Bitmap OutImg = CreateBitmap(Resolution, ref ExportInfo, PixFormat))
{
//First image is handled differently.
Bitmap ActualOutImg = Is1bpp || ColorDepth != ImageColorDepth.TrueColor ? CreateBitmap(Resolution, ref ExportInfo, RgbPixFormat) : OutImg;
try
{
using (Graphics Gr = Graphics.FromImage(ActualOutImg))
{
Gr.FillRectangle(Brushes.White, 0, 0, ActualOutImg.Width, ActualOutImg.Height); //Clear the background
ExportNext(Gr, ref ExportInfo);
}
if (Is1bpp)
{
FloydSteinbergDither.ConvertToBlackAndWhite(ActualOutImg, OutImg);
}
else
if (!IsFax && ColorDepth == ImageColorDepth.Color256)
{
OctreeQuantizer.ConvertTo256Colors(ActualOutImg, OutImg);
}
}
finally
{
if (ActualOutImg != OutImg)
{
ActualOutImg.Dispose();
}
}
OutImg.Save(OutStream, info, ep);
ep.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag, (long)EncoderValue.FrameDimensionPage);
//Now the rest of images.
ExportInfo = ExportAllImagesButFirst(ep, Is1bpp, ExportInfo, RgbPixFormat, OutImg, ColorDepth);
ep.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag, (long)EncoderValue.Flush);
OutImg.SaveAdd(ep);
}
}