private TImgExportInfo GetExportInfo(IFlxGraphics aCanvas)
{
TImgExportInfo Result = new TImgExportInfo();
if (AllVisibleSheets)
{
int FirstVisibleSheet = -1;
int SaveActiveSheet = Workbook.ActiveSheet;
try
{
Result.Sheets = new TOneImgExportInfo[Workbook.SheetCount];
for (int sheet = 1; sheet <= Workbook.SheetCount; sheet++)
{
Workbook.ActiveSheet = sheet;
if (Workbook.SheetVisible != TXlsSheetVisible.Visible)
{
continue;
}
if (FirstVisibleSheet < 0)
{
FirstVisibleSheet = sheet;
}
TOneImgExportInfo OneResult = new TOneImgExportInfo();
OneResult.FPrintRanges = FRenderer.InternalCalcPrintArea(FPrintRange);
TPaperDimensions pd = GetRealPageSize();
OneResult.FPageBounds = new RectangleF(0, 0, pd.Width, pd.Height);
FRenderer.InitializePrint(aCanvas, OneResult.PageBounds, OneResult.PageBounds, OneResult.PrintRanges, out OneResult.FPaintClipRect, out OneResult.FTotalPages, out OneResult.FPagePrintRange);
Result.Sheets[sheet - 1] = OneResult;
}
}
finally
{
Workbook.ActiveSheet = SaveActiveSheet;
}
Result.CurrentSheet = FirstVisibleSheet;
}
else
{
TOneImgExportInfo OneResult = new TOneImgExportInfo();
OneResult.FPrintRanges = FRenderer.InternalCalcPrintArea(FPrintRange);
TPaperDimensions pd = GetRealPageSize();
OneResult.FPageBounds = new RectangleF(0, 0, pd.Width, pd.Height);
FRenderer.InitializePrint(aCanvas, OneResult.PageBounds, OneResult.PageBounds, OneResult.PrintRanges, out OneResult.FPaintClipRect, out OneResult.FTotalPages, out OneResult.FPagePrintRange);
Result.Sheets = new TOneImgExportInfo[1];
Result.Sheets[0] = OneResult;
Result.CurrentSheet = Workbook.ActiveSheet;
}
Result.ResetCurrentPage();
LastInitSheet = 0;
return(Result);
}
/// <summary>
/// Return the pages to print. This is a costly operation, so cache the results.
/// </summary>
/// <returns></returns>
public int TotalPages()
{
TImgExportInfo ei = null;
if (!ExportNext(null, ref ei))
{
return(0);
}
return(ei.TotalPages);
}
private Bitmap CreateBitmap(float Resolution, ref TImgExportInfo ExportInfo, PixelFormat PxFormat)
{
if (ExportInfo == null)
{
ExportInfo = GetFirstPageExportInfo();
}
TPaperDimensions pd = GetRealPageSize(ExportInfo.NextSheet);
Bitmap Result =
BitmapConstructor.CreateBitmap((int)Math.Ceiling(pd.Width / 96F * Resolution),
(int)Math.Ceiling(pd.Height / 96F * Resolution), PxFormat);
Result.SetResolution(Resolution, Resolution);
return(Result);
}
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);
}
}
/// <summary>
/// Returns a deep copy of a TImgExportInfo. This method will work even if the source object is null.
/// </summary>
/// <param name="source"></param>
/// <returns></returns>
public static TImgExportInfo Clone(TImgExportInfo source)
{
if (source == null)
{
return(null);
}
TImgExportInfo Result = (TImgExportInfo)source.MemberwiseClone();
if (source.FSheets != null)
{
Result.FSheets = new TOneImgExportInfo[source.FSheets.Length];
for (int i = 0; i < source.FSheets.Length; i++)
{
Result.FSheets[i] = TOneImgExportInfo.Clone(source.FSheets[i]);
}
}
return(Result);
}
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);
}
}
/// <summary>
/// Exports the associated xls workbook to a file.
/// </summary>
/// <param name="fileName">File to export.</param>
/// <param name="format">Format for the created image.</param>
/// <param name="imgFormat">Format for the saved image</param>
/// <param name="exportInfo"> Information needed to export, cached for speed. The first time you call this method (or when you change xls.ActiveSheet), make exportInfo=null</param>
public bool ExportNext(string fileName, PixelFormat format, ImageFormat imgFormat, ref TImgExportInfo exportInfo)
{
bool Result = false;
if (exportInfo != null && exportInfo.CurrentPage >= exportInfo.TotalPages)
{
return(false);
}
//if (Workbook.RowCount<=0) return false; A sheet might have only images.
try
{
FileMode fm = FileMode.CreateNew;
if (AllowOverwritingFiles)
{
fm = FileMode.Create;
}
using (FileStream f = new FileStream(fileName, fm, FileAccess.Write))
{
Result = ExportNext(f, format, imgFormat, ref exportInfo);
}
}
catch (IOException)
{
//Don't delete the file in an io exception. It might be because allowoverwritefiles was false, and the file existed.
throw;
}
catch
{
File.Delete(fileName);
throw;
}
return(Result);
}
/// <summary>
/// Exports the associated xls workbook to a stream.
/// </summary>
/// <param name="imgStream">Stream where the image will be exported.</param>
/// <param name="format">Pixel depth for the created image.</param>
/// <param name="imgFormat">Format for the saved image</param>
/// <param name="exportInfo"> Information needed to export, cached for speed. The first time you call this method (or when you change xls.ActiveSheet), make exportInfo=null</param>
public bool ExportNext(Stream imgStream, PixelFormat format, ImageFormat imgFormat, ref TImgExportInfo exportInfo)
{
bool Result = false;
using (Bitmap bmp = CreateBitmap(Resolution, ref exportInfo, format))
{
using (Graphics g = Graphics.FromImage(bmp))
{
Result = ExportNext(g, ref exportInfo);
}
if (Result)
{
bmp.Save(imgStream, imgFormat);
}
}
return(Result);
}
/// <summary>
/// Exports the associated xls workbook to a graphics stream. You need to provide a
/// Graphics object with the correct dimensions. (To get the needed dimensions, use <see cref="GetRealPageSize()"/>
/// </summary>
/// <param name="imgData">Graphics where the image will be stored. Set it to null to skip the page.</param>
/// <param name="exportInfo"> Information needed to export, cached for speed. The first time you call this method (or when you change xls.ActiveSheet), make exportInfo=null</param>
public bool ExportNext(Graphics imgData, ref TImgExportInfo exportInfo)
{
FRenderer.CreateFontCache();
try
{
Bitmap bmp = null;
try
{
if (imgData == null)
{
bmp = BitmapConstructor.CreateBitmap(1, 1);
imgData = Graphics.FromImage(bmp);
imgData.PageUnit = GraphicsUnit.Point;
}
IFlxGraphics aCanvas = new GdiPlusGraphics(imgData);
GraphicsUnit OriginalUnits = imgData.PageUnit;
try
{
imgData.PageUnit = GraphicsUnit.Point;
FRenderer.SetCanvas(aCanvas);
try
{
if (exportInfo == null)
{
exportInfo = GetExportInfo(aCanvas);
}
exportInfo.IncCurrentPage();
if (exportInfo.CurrentPage > exportInfo.TotalPages)
{
return(false);
}
int SaveActiveSheet = Workbook.ActiveSheet;
try
{
Workbook.ActiveSheet = exportInfo.CurrentSheet;
int CurrentLogicalPage = -1;
if (ResetPageNumberOnEachSheet)
{
CurrentLogicalPage = exportInfo.ActiveSheet.FCurrentPage;
}
else
{
CurrentLogicalPage = exportInfo.CurrentPage;
}
TOneImgExportInfo OneResult = exportInfo.ActiveSheet;
if (LastInitSheet != exportInfo.CurrentSheet)
{
TXlsCellRange ra; int p; RectangleF[] r;
FRenderer.InitializePrint(aCanvas, OneResult.PageBounds, OneResult.PageBounds, OneResult.PrintRanges, out r, out p, out ra);
LastInitSheet = exportInfo.CurrentSheet;
}
if (bmp == null)
{
OnBeforePaint(new ImgPaintEventArgs(imgData, CalcPageBounds(exportInfo.ActiveSheet.PageBounds), exportInfo.CurrentPage, exportInfo.ActiveSheet.CurrentPage, exportInfo.TotalPages));
}
FRenderer.GenericPrint(aCanvas, OneResult.PageBounds, OneResult.PrintRanges, CurrentLogicalPage,
OneResult.PaintClipRect, exportInfo.TotalLogicalPages(ResetPageNumberOnEachSheet), bmp == null,
OneResult.PagePrintRange, ref OneResult.FCurrentPrintArea);
aCanvas.ResetClip();
if (bmp == null)
{
OnAfterPaint(new ImgPaintEventArgs(imgData, CalcPageBounds(exportInfo.ActiveSheet.PageBounds), exportInfo.CurrentPage, exportInfo.ActiveSheet.CurrentPage, exportInfo.TotalPages));
}
}
finally
{
Workbook.ActiveSheet = SaveActiveSheet;
}
}
finally
{
FRenderer.SetCanvas(null);
}
}
finally
{
imgData.PageUnit = OriginalUnits;
}
}
finally
{
if (bmp != null)
{
bmp.Dispose();
imgData.Dispose();
}
}
}
finally
{
FRenderer.DisposeFontCache();
}
return(true);
}
