#1 Re: PDF Engine » PDF render error » 2016-03-11 13:19:08

Hi!

I finally found the real BUG.

The problem occurrs when I use this windows API functions over the MetafileCanvas.

CreateRectRgnIndirect
SelectClipRgn

I create my MetafileCanvas setting a custom clip region to draw my stuff, and when I draw some images over the MetafileCanvas the PDF cannot render it correctly.

Here is the sample that reproduces the problem.

https://www.dropbox.com/s/ikoi2dv1wgzbf … g.zip?dl=0

To fix, I just removed my clip region!

#2 Re: PDF Engine » PDF render error » 2016-01-26 17:53:47

ab, problem solved!

I think the problem was around EMR_STRETCHBLT.

Below the complete solution that worked for me:

betoneto.tbo wrote:

I upgraded to the latest version.

But I made some extra changes. I realy think that the faulty is about the image drawing (StretchDraw and different types of image).

I was drawing using the canvas Draw(X,Y,Graphic) and StretchDraw(Rect,Graphic), the images were bitmaps, jpgs, pngs.

Now I changed it to always generate a bitmap with the expected result size and without transparency. Then I draw it (using Draw(X,Y,Bitmap)) to the MetafileCanvas. So now I have only bitmaps in the metafile, so as in the resulting PDF.

I'll let this changes in test in some of my customers, because I wasn't able to reproduce the problem. I'll update this thread with the results in some days.

#3 Re: PDF Engine » PDF render error » 2016-01-20 17:53:25

I upgraded to the latest version.

But I made some extra changes. I realy think that the faulty is about the image drawing (StretchDraw and different types of image).

I was drawing using the canvas Draw(X,Y,Graphic) and StretchDraw(Rect,Graphic), the images were bitmaps, jpgs, pngs.

Now I changed it to always generate a bitmap with the expected result size and without transparency. Then I draw it (using Draw(X,Y,Bitmap)) to the MetafileCanvas. So now I have only bitmaps in the metafile, so as in the resulting PDF.

I'll let this changes in test in some of my customers, because I wasn't able to reproduce the problem. I'll update this thread with the results in some days.

#4 Re: PDF Engine » PDF render error » 2016-01-20 10:26:38

ab wrote:

Try to find out, using EmfExplorer, which EMF_* commands may be faulty.
Once you identified which part of SynPdf needs improvement, we may start looking into it.

I don't known how to do that, this is because that I'm here!

ab wrote:

How does your application generate the EMF?
Is it a known reporting tool/component?

It is generated using delphi native api (TMetafileCanvas, textOut, Draw, etc...)

ab wrote:

If there is no image/logo, does it work as expected?

Yes, it works!

ab wrote:

Which version of SynPDF are you using? Current from our source code repository is 1.18.2273.

I'm using version 1.18.1417.

#5 PDF Engine » PDF render error » 2016-01-19 16:22:16

betoneto.tbo
Replies: 7

My application generate EMF images and I render them into PDF using RenderMetaFile function.

Sometimes, not every, the resulting pdfs have render problems, normally when they contains images/logos.

Below 2 PDFs with the problem. They only work inside Chrome. Using another reader like Acrobat Reader they dont present errors.

  https://dl.dropboxusercontent.com/u/697 … %20151.pdf

This is the EMF source:

  https://dl.dropboxusercontent.com/u/697 … 0147-2.emf

I tried EMFExplorer, but I have no idea how to use it and what I need to search for.

#6 Re: PDF Engine » Another bug drawing metafiles in pdf » 2012-03-30 13:28:25

This ?


R0808: [081] EMR_STRETCHDIBITS    (s=36884)    {rclBounds(55,155,72,167), Dest[x:0, y:0, cx:134, cy:91)], dwRop(0x00CC0020), Src[x:0, y:0, cx:134, cy:91, iUsage:0, offBmi:80, Bmi:40, offBits:120, Bits:36764] BmiHeader[biSize:40, biWidth:134, biHeight:91, biPlanes:1, biBitCount:24, biCompression:0, biSizeImage:36764, biXPelsPerMeter:0, biYPelsPerMeter:0, biClrUsed:0, biClrImportant:0]}


You cannot download my source code and take a look ?
  http://www.mediafire.com/?ftesmt6xm4k9r70

#7 Re: PDF Engine » Another bug drawing metafiles in pdf » 2012-03-30 11:39:32

OK, I found the image problem, but only it, using the EMF Explorer.

If you open the generated PDF with that EMF, you will able to see others bugs:
- image size (barcode image)
- rectangles drawed in incorrect positions

#8 Re: PDF Engine » Another bug drawing metafiles in pdf » 2012-03-29 11:03:26

Only one thing I do not understand ....

Printing the report from QuickReport with PDFCreator printer, all is well. The resulting PDF becomes correctly.

There is no possibility to make a work around? I don`t want to "hunt" this bug over QuickReport, it sucks!


Thanks!

#10 PDF Engine » Another bug drawing metafiles in pdf » 2012-03-28 16:39:31

betoneto.tbo
Replies: 8

I created a filter implementation for QuickReport, to export the report to a PDF, using PdfEngine 1.15.

The example attached reproduces the bug.
Take a look at "Page1.emf" inside the zip, note that the metafile is correct, but when I play it to the pdf, the metafile imagens become larger...


Zip with sourcecode to reproduce the bug:
http://www.4shared.com/zip/01AQRFxN/Syn … e_bug.html

Thanks.

#11 Re: PDF Engine » App HALTING with SynPDF 1.16 (trunk) » 2012-03-07 14:31:11

What I mean with "shutdown" is, my application halt, exit, closes instantaneously!

I was using FastMM 4.98 with SynPDF 1.15

Now I'm using FastMM 4.99 with SynPDF 1.16 (from trunk).


I cannot reproduce this, because the problem occurs indefinitely....

... sometimes when the user click on any button...  sometimes when the user moves the mouse... this is bizzare!


I will try downgrade to SynPDF 1.15, checking for old bugs, and I will report...
I will try downgrade FastMM to 4.98  too...

Thanks for this moment....

#12 PDF Engine » App HALTING with SynPDF 1.16 (trunk) » 2012-03-07 13:37:41

betoneto.tbo
Replies: 6

Hi...

Recently I was forced to migrate to a version of PDFengine coming from TRUNK.

With this version my system began to shut down without giving any error. The enduser is using a screen, that does not use SynPDF, and suddenly the application halt!

This problem started after I used version 1.16 of the trunk (SynPdf, SynCommons, ...).

To solve the problem, I created a DLL to create PDFs for me, and apparently the problem stopped occurring.

I suspect that there is a problem in SynCommons. I've already reported two problems that I encountered in this unit (check posts with my name).

I recently had problems with an access violation in PNFIMAGE.PAS unit, that I use .... the strange thing is that I use that unit more than five years, and it never had problems, but now with this version a problem appeared. I solve this problem by enabling PURE_PASCAL to prevent SynCommons to override the MOVE, FillChar and RECORDCOPY, but this didn't solve the halting problem...

I use in my system:
- Delphi 7 Enterprise.
- Runtime Packages
- FastMem 4.99


Can someone help me?

#13 Re: PDF Engine » Incompatibility with FastMem » 2012-02-22 13:33:09

This was my AV:

[007526ED] SynCommons.Move (Line 8576, "JJWCommon\Third Part\pdf\SynCommons.pas" + 21) + $0
[0068219D] Windows.CopyMemory + $1
[0069F583] pngimage.TChunkIHDR.Assign (Line 2233, "JJWCommon\Third Part\PngImage\pngimage.pas" + 14) + $19
[006A43F8] pngimage.TPNGObject.AssignPNG (Line 5300, "JJWCommon\Third Part\PngImage\pngimage.pas" + 15) + $1A
[006A28B0] pngimage.TPNGObject.Assign (Line 4409, "JJWCommon\Third Part\PngImage\pngimage.pas" + 6) + $11
[016898DE] Graphics.TPicture.SetGraphic + $2A
[0070CBBE] JJWDBImage.TJJWDBImage.FDataLinkDataChange (Line 303, "JJWComponents\JJWDBImage.pas" + 21) + $12
[4080B2B8] Dbctrls.TFieldDataLink.RecordChanged + $18
[4080B0D8] Dbctrls.TFieldDataLink.SetField + $18
[4080B114] Dbctrls.TFieldDataLink.UpdateField + $30
[4080B21D] Dbctrls.TFieldDataLink.ActiveChanged + $5
[40348A2D] Db.TDataLink.SetActive + $21
[40348A5C] Db.TDataLink.UpdateState + $18
[40348B76] Db.TDataLink.DataEvent + $E
[4080B2FF] Dbctrls.TFieldDataLink.DataEvent + $F
[403491B1] Db.TDataSource.NotifyLinkTypes + $3D
[403491E2] Db.TDataSource.NotifyDataLinks + $1E
[40348FEA] Db.TDataSource.SetState + $16
[40349031] Db.TDataSource.UpdateState + $15
[403491FC] Db.TDataSource.DataEvent + $10
[4034DB78] Db.TDataSet.DataEvent + $130
[402F8288] Dbclient.TCustomClientDataSet.DataEvent + $58
[4034BC89] Db.TDataSet.SetState + $21
[4034C1BB] Db.TDataSet.OpenCursorComplete + $47
[4034C0EB] Db.TDataSet.SetActive + $77
[4034C12F] Db.TDataSet.SetActive + $BB
[4034BF14] Db.TDataSet.Open + $4
[00741EC0] UJJWDBXDataModule.TJJWDBXDataModule.SQLOpen (Line 1370, "JJWMiddleManagers\SQLManager\UJJWDBXDataModule.pas" + 7) + $6
[0658EFB3] Ufrmfatnfs.TFrmFATNFS.LnkPESPessoasClientesClick + $7F
[01701C38] Controls.TControl.Click + $64
[016A80FC] Buttons.TSpeedButton.Click + $0
[00833F26] JJWUIChildFormLinkButton.TJJWUIChildFormLinkButton.Click (Line 216, "JJWManagersComponents\JJWUIChildFormLinkButton.pas" + 94) + $2
[016A80E6] Buttons.TSpeedButton.MouseUp + $E2
[01702024] Controls.TControl.DoMouseUp + $2C
[01702099] Controls.TControl.WMLButtonUp + $69
[01701A98] Controls.TControl.WndProc + $188
[00834150] JJWUIChildFormLinkButton.TJJWUIChildFormLinkButton.WndProc (Line 296, "JJWManagersComponents\JJWUIChildFormLinkButton.pas" + 1) + $2
[01701868] Controls.TControl.Perform + $24
[01704B2E] Controls.TWinControl.IsControlMouseMsg + $82
[4000341A] System.@GetMem + $A
[01704C1A] Controls.TWinControl.WndProc + $DA
[40006F33] System.@LStrFromPCharLen + $23
[01704914] Controls.TWinControl.MainWndProc + $2C
[4003E038] Classes.TDataModule.WriteHeight + $20
[017506AD] Appevnts.TCustomApplicationEvents.DoMessage + $D
[0172568B] Forms.TApplication.ProcessMessage + $83
[017256C2] Forms.TApplication.HandleMessage + $A
[017258F2] Forms.TApplication.Run + $96
(000244B3) [004254B3]

#14 PDF Engine » Incompatibility with FastMem » 2012-02-21 15:56:08

betoneto.tbo
Replies: 3

I got an AV while using SynCommons.pas and FastMM4.pas.

The AV has ocurred at the MOVE procedure, what is replaced by the SynCommons (internal move)...
I solved the problem using PUREPASCAL definition...


My suggestion is to create a DEFINITION to disable this optimization (copyrecord, move, etc.) in the SynCommons.pas.

I wasn't able to reproduce the AV with a sample code, sorry (I will continue trying..)

#15 Re: PDF Engine » Access violation drawing metafile with bitmap » 2012-02-14 13:55:17

"Thanks" you man, nice support!

Now I'm able to inactive PUREPASCAL define, and all works fine!!!

.... BUT using PUREPASCAL another AV occurs...

Version: 1.16 (trunk)

[005EC479] SynPdf.HashOf (Line 4994, "JJWCommon\Third Part\pdf\SynPdf.pas" + 3) + $C
[005EC4CB] SynPdf.DoHash (Line 5028, "JJWCommon\Third Part\pdf\SynPdf.pas" + 2) + $4
[005EC616] SynPdf.TPdfDocument.CreateOrGetImage (Line 5051, "JJWCommon\Third Part\pdf\SynPdf.pas" + 19) + $D
[005F294A] SynPdf.TPdfEnum.DrawBitmap (Line 7603, "JJWCommon\Third Part\pdf\SynPdf.pas" + 16) + $11
[005F2611] SynPdf.EnumEMFFunc (Line 7501, "JJWCommon\Third Part\pdf\SynPdf.pas" + 216) + $30
[005F272A] SynPdf.TPdfCanvas.RenderMetaFile (Line 7538, "JJWCommon\Third Part\pdf\SynPdf.pas" + 18) + $1F

#16 Re: PDF Engine » Access violation drawing metafile with bitmap » 2012-02-14 12:58:32

I got a WORKAROUND:

  // setting on TPdfDocumentGDI
  pdf.ForceNoBitmapReuse := True;

#18 Re: PDF Engine » Access violation drawing metafile with bitmap » 2012-02-14 12:09:48

Take a look on the algorithm of (SynCommons.pas 1.16)


function SubHash(P: PCardinalArray; L: integer): cardinal;

// from line = 13838
// L = 3072

1:  for i := 1 to L shr 4 do begin // 16 bytes (4 DWORD) by loop - aligned read
      inc(s1,P^[0]);
      inc(s2,s1);
      inc(s1,P^[1]);
      inc(s2,s1);
      inc(s1,P^[2]);
      inc(s2,s1);
      inc(s1,P^[3]);
      inc(s2,s1);
2:    inc(PtrUInt(P),16);
    end;
    for i := 1 to (L shr 2)and 3 do begin // 4 bytes (DWORD) by loop
      inc(s1,P^[0]);
      inc(s2,s1);
      inc(PtrUInt(P),4);
    end;
3:    inc(s1,P^[0] and Mask[L and 3]);      // remaining 0..3 bytes
    inc(s2,s1);
    result := s1 xor (s2 shl 16);


1 -> ((L = 3072) shr 4) = 192
2 -> 192 * 16 = 3072 (END OF CARDINAL ARRAY)
3 -> (THERE ISN'T 4 REMAINING BYTES, NOW AV!)

#19 Re: PDF Engine » Access violation drawing metafile with bitmap » 2012-02-14 11:25:58

I tried with the trunk version (1.16), I defined USEPACKAGES in Synopse.inc (because I'm using the SynPdf in a runtime package).

I got another AV.....

[007B47CA] SynCommons.Hash32 (Line 13908, "JJWCommon\Third Part\pdf\SynCommons.pas" + 35) + $0
[007EB080] SynPdf.DoHash (Line 5027, "JJWCommon\Third Part\pdf\SynPdf.pas" + 1) + $4
[007EB1D6] SynPdf.TPdfDocument.CreateOrGetImage (Line 5051, "JJWCommon\Third Part\pdf\SynPdf.pas" + 19) + $D
[007F150A] SynPdf.TPdfEnum.DrawBitmap (Line 7603, "JJWCommon\Third Part\pdf\SynPdf.pas" + 16) + $11
[007F11D1] SynPdf.EnumEMFFunc (Line 7501, "JJWCommon\Third Part\pdf\SynPdf.pas" + 216) + $30
[007F12EA] SynPdf.TPdfCanvas.RenderMetaFile (Line 7538, "JJWCommon\Third Part\pdf\SynPdf.pas" + 18) + $1F


At the first post, I was using PUREPASCAL define...

#20 PDF Engine » Access violation drawing metafile with bitmap » 2012-02-14 10:47:17

betoneto.tbo
Replies: 7

I got a AV when I trying to create a PDF, drawing a Metafile that contains a bitmap image.

SynCommons: 1.15
SynPdf........: 1.16

Error stack trace:

[007B3440] SynCommons.SubHash (Line 13358, "JJWCommon\Third Part\pdf\SynCommons.pas" + 20) + $A
[007B3458] SynCommons.Hash32 (Line 13365, "JJWCommon\Third Part\pdf\SynCommons.pas" + 0) + $0
[007E931C] SynPdf.DoHash (Line 5018, "JJWCommon\Third Part\pdf\SynPdf.pas" + 1) + $4
[007E9472] SynPdf.TPdfDocument.CreateOrGetImage (Line 5042, "JJWCommon\Third Part\pdf\SynPdf.pas" + 19) + $D
[007EF7A6] SynPdf.TPdfEnum.DrawBitmap (Line 7596, "JJWCommon\Third Part\pdf\SynPdf.pas" + 16) + $11
[007EF470] SynPdf.EnumEMFFunc (Line 7494, "JJWCommon\Third Part\pdf\SynPdf.pas" + 215) + $30
[007EF586] SynPdf.TPdfCanvas.RenderMetaFile (Line 7531, "JJWCommon\Third Part\pdf\SynPdf.pas" + 18) + $1F


Code:

    with TPdfDocumentGDI.Create do
      try
        //evita o problema de não rendenizar o texto corretamente
        UseUniscribe := True;

        CompressionMethod := cmFlateDecode;
        ScreenLogPixels := 72;

        NewDoc;
        with AddPage do
          Canvas.RenderMetaFile(myTMetafileInstance, 1, MARGIN, -MARGIN, False, 0, 0);
      finally
        Free;
      end;

If you need the source metafile, send me a private message with your email address, and I will send you it.

Thanks.

#21 Re: PDF Engine » AccessViolation at saving PDF to stream » 2011-12-16 12:58:19

Working 100%, nice work!

Ps.: I also need to use UniScribe=true to render the PDF correctly....

Thanks!
bye!

#22 Re: PDF Engine » AccessViolation at saving PDF to stream » 2011-12-16 11:47:24

Example at:
http://www.4shared.com/file/U8fV6lTV/SynPdfBUG.html

Decompress, open in delphi, run and click on the button!

The example creates a TPdfDocumentGDI and render 24 metafiles on it. At the TPdfDocumentGDI.savetostream the A.V. occours.

Bye.

#23 Re: PDF Engine » AccessViolation at saving PDF to stream » 2011-12-15 10:26:12

This PDF is only created drawing Metafiles (renderMetafile method)...

In this metafiles exists custom fonts (created by windows API CreateFont http://msdn.microsoft.com/en-us/library … s.85).aspx ). This fonts are created based on Courier New and has diferent fixed widths.

Can this be the problem? If yes, how can I fix this? (I cannot stop using the CreateFont because of  my Report Generator)

#24 PDF Engine » AccessViolation at saving PDF to stream » 2011-12-14 17:59:11

betoneto.tbo
Replies: 7

PDF Engine 1.15

I`m creating a PDF GDI and saving to a stream. During the save progress, a access violation occours (accessing a NIL value)


I have done a workaround (but I dont known if is correct) in SynPdf.pas added after line 3047:

    procedure TPdfDictionary.AddItem(const AKey: PDFString; AValue: TPdfObject;
      AInternal: Boolean);
    var FItem: TPdfDictionaryElement;
    begin
      RemoveItem(AKey);
      if AValue = nil then Exit;    /// <<<<<<<< THIS IS MY W.A.  <<<<<<<<<<
      if AValue.ObjectType = otDirectObject then

The exception cause comes from (line 6490, SynPdf.pas):

      procedure TPdfFontTrueType.PrepareForSaving;    
      ....
        if fDoc.PDFA1 or not WinAnsiFont.fFixedWidth then begin
          WR.Add('['); // fixed width will use /DW value
          // WinAnsiFont.fUsedWide[] contains glyphs used by ShowText
          for i := 0 to n-1 do
            with WinAnsiFont.fUsedWide[i] do
              if int<>0 then
                WR.Add(Glyph).Add('[').Add(Width).Add(']');
        Descendant.AddItem('W',TPdfRawText.Create(WR.Add(']').ToPDFString));
        end;
        Descendant.AddItem('FontDescriptor',WinAnsiFont.fFontDescriptor);   //// BUG: WinAnsiFont.fFontDescriptor = nil !!! WHY ?
        fDoc.FXref.AddObject(Descendant);

     

This is the stacktrace :

[0080BEBD] SynPdf.TPdfDictionary.AddItem (Line 3048, "JJWCommon\Third Part\pdf\SynPdf.pas" + 3) + $3 
[0080BEB5] SynPdf.TPdfDictionary.AddItem (Line 3046, "JJWCommon\Third Part\pdf\SynPdf.pas" + 1) + $6 
[0080BF78] SynPdf.TPdfDictionary.AddItem (Line 3062, "JJWCommon\Third Part\pdf\SynPdf.pas" + 1) + $19 
[00815974] SynPdf.TPdfFontTrueType.PrepareForSaving (Line 6491, "JJWCommon\Third Part\pdf\SynPdf.pas" + 28) + $13 
[0080BF11] SynPdf.TPdfDictionary.AddItem (Line 3052, "JJWCommon\Third Part\pdf\SynPdf.pas" + 7) + $9 
[0081010C] SynPdf.TPdfDocument.SaveToStream (Line 4631, "JJWCommon\Third Part\pdf\SynPdf.pas" + 15) + $3 
[00817AB5] SynPdf.TPdfDocumentGDI.SaveToStream (Line 7119, "JJWCommon\Third Part\pdf\SynPdf.pas" + 12) + $C 

Sorry about my english!

Bye.

#25 Re: PDF Engine » Margin and RenderMetafile » 2011-11-28 18:03:11

I solved the problem.

I noticed the following:
Change the page size causes the problem. I had to use the DefaultPageWidth and DefaultPageHeight.

And thanks about the tip:
  "Note also that PDF coordinates are not working the same as GDI coordinates: they are bottom-left based."

Please, make tests changing the page size to smaller and bigger  pages.


I think there is any problem related to changing the page size.

Try to make a PDF, add a new page and decrease the size of this page. Then try to paint a metafile of the same size on this page.

Thanks.

#26 Re: PDF Engine » Margin and RenderMetafile » 2011-11-28 17:02:28

This is my code:

with TPdfDocumentGDI.Create do
      try
        UseUniscribe := True;

        CompressionMethod := cmFlateDecode;
        ScreenLogPixels := 72;

        NewDoc;

        page := TMetafile.Create;
        try
          for i := 1 to GraphicReport.PageCount do
          begin
            GraphicReport.DrawPage(i,  page); // this this the METAFILE generated by my ReportGenerator

            with AddPage do
            begin
              PageWidth := Max(PageWidth, page.Width + (MARGIN * 2));
              PageHeight := Max(PageHeight, page.Height + (MARGIN * 2));

              Canvas.RenderMetaFile(page, 1, 0, 0, False);
            end;
          end;
        finally
          page.Free;
        end;

        SaveToStream(Stream);
      finally
        Free;
      end;


After the export, the PDF has rendered my metafile out of the pdf page. the OffsetY seems not being respected.

More curious still is the following ...

The more I increase the offsetY (200, 300, 400 ...) the top margin decreases instead of increasing.

#27 PDF Engine » Margin and RenderMetafile » 2011-11-28 16:19:29

betoneto.tbo
Replies: 5

Hi.

I need to render a Metafile using canvas.RenderMetafile at position x:0, y:0.

After do this, a got Margins at the resulting pdf.

How can I force the PDF to have NO MARGINS ?

#28 Re: PDF Engine » BUG: Rending Metafile with VCLCanvas » 2011-11-23 15:17:17

Guys, I solved the problem.

I just set the TPdfDocumentGDI.UseUniscribe to true.

Bye.

#29 PDF Engine » BUG: Rending Metafile with VCLCanvas » 2011-11-23 12:56:14

betoneto.tbo
Replies: 1

Hi.


I have found a bug at the PDF engine.
My report generator is using the PDF engine to export the report as PDF.

Internaly, the generator create a metafile and draw it to the PDF via VCLCanvas.

Below, the resulting PDF:

http://www.4shared.com/document/3mxTiIPt/teste.html?

Note, at the end of the PDF, exists a text, drawed as:

"Valor das mercadoria"

If you select the line text, and press CTRL+C (to copy the text) you will get this:

"Valor das mercadoria s:"



Any idea ?

Thanks, and sorry about my english...

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