SOS!!Again about Print Black Rectangle!!

Comments

• gordk St.Catherines On. Canada.

  November 2003 edited 7:57AM

  This problem seems to be a very intermitent thing.I haven't been able to reproduce it on my own or customers systems.
  need all the info you can give
  customer environment- op system, printer, printer driver vers, vidcard and mem, system mem, network printer or local,
  report- does it produce a large number of pages,
  development system- os, ide ver.
  regards
• lool

  November 2003 edited 7:57AM

  hi,
  
  i had this kind of problem too (but with QR)
  it seems that using GlobalAlloc is safer than AllocMem.. and
  that FR and QR use AllocMem.
  
  here reply from Adam Johnston - thank to him - on the
  borland newsgroup.
  
  Hope this can help
  LooL
  
  
  
  -I changed the PrintBitmap routine to the following and it fixed the problem
  -on my machine. There's a problem with AllocMem memory being trashed
  -apparently (credit to whoever worked it out) so use GlobalAlloc.
  
  -Regards
  -AJAY
  
  -{ TQRImage }
  
  - procedure PrintBitmap(aCanvas : TCanvas; Dest : TRect; Bitmap : TBitmap);
  - var
  - Info : PBitmapInfo;
  - InfoSize : DWORD;
  - Image : Pointer;
  -//
  -// PATCH: MEMORY ALLOCATION PROBLEM
  -//

  ---

  -//
  - HInfo:HGLOBAL; //Declare this new var
  - HImage:HGLOBAL; //Declare this new var
  -//
  -// PATCH: END
  -//

  ---

  -//
  -{$ifdef ver80}
  - ImageSize : Longint;
  -{$else}
  - ImageSize : DWord;
  {$endif}
  begin
  with Bitmap do
  begin
  GetDIBSizes(Handle, InfoSize, ImageSize);
  //
  // PATCH: MEMORY ALLOCATION PROBLEM
  //

  ---

  //
  // This is the source of the problem. AllocMem allocates a memory block on
  the
  // heap but windows sometimes (expecially during slow down) needs to move to
  // another area. The pointer is not updated so quick report prints a black
  box.
  //
  // Info := AllocMem(InfoSize);
  //
  // The GlobalAlloc function allocates memory on the heap(This Win32 API
  // doesn't make difference between local and global heap)
  // The second line is the most important. We lock the memory allocated so
  that
  // windows will never move it and our bitmap pointer will always point to
  the
  // right memory address.
  //
  HInfo := GlobalAlloc(GMEM_MOVEABLE or GMEM_SHARE,InfoSize);
  Info := PBitmapInfo(GlobalLock(HInfo));
  //
  // PATCH: END
  //

  ---

  //
  try
  //
  // PATCH: MEMORY ALLOCATION PROBLEM
  //

  ---

  //
  // Image := AllocMem(ImageSize);
  //
  HImage := GlobalAlloc(GMEM_MOVEABLE or GMEM_SHARE,ImageSize);
  Image := Pointer(GlobalLock(HImage));
  //
  // PATCH: END
  //

  ---

  //
  try
  GetDIB(Handle, Palette, Info^, Image^);
  if not Monochrome then
  SetStretchBltMode(ACanvas.Handle, STRETCH_DELETESCANS);
  with Info^.bmiHeader do
  StretchDIBits(aCanvas.Handle, Dest.Left, Dest.Top,
  Dest.RIght - Dest.Left, Dest.Bottom - Dest.Top,
  0, 0, biWidth, biHeight, Image, Info^, DIB_RGB_COLORS,
  SRCCOPY);
  finally
  //
  // PATCH: MEMORY ALLOCATION PROBLEM
  //

  ---

  //
  // FreeMem(Image, ImageSize);
  GlobalUnlock(HImage); // We first unlock the previously
  locked memory
  GlobalFree(HImage); // and then we free it
  //
  // PATCH: END
  //

  ---

  //
  end;
  finally
  //
  // PATCH: MEMORY ALLOCATION PROBLEM
  //

  ---

  //
  // FreeMem(Info, InfoSize);
  GlobalUnlock(HInfo); // We first unlock the previously
  locked memory
  GlobalFree(HInfo); // and then we free it
  //
  // PATCH: END
  //

  ---

  //
  end;
  end;
  end;
  
  
  <user@domain.invalid> wrote in message
  news:3f98fb5d@newsgroups.borland.com...
  
  > same problem exist when printing images Delphi6 + FastReport2.5 + HP
  > printers + W2K/XP ???,
  >
  > is the bug in Delphi routines, or interfaces to Windows???
  > image processing code in QR and FR is identical - GetDIBits,
  > StrechDIBits, ...
  >
  > Adam Johnston wrote:
  
  > > Its a bug in Quick Reports PrintBitmap code thats been there for years
  
  and
  
  > > they haven't bothered to fix. You will need to buy the Pro update to
  
  get
  
  > > the source code then patch manually.
  
  >
  
  > >>I have a problem printing a report with a QRImage. Sometimes the QRImage
  > >>print all in black. The image have bmp format, and low resolution (is a
  > >>enterprise logo).
  
  >
  
• xwg_net

  November 2003 edited 7:57AM

  try fr2.51
  
  in fr2.51 TfrPictureView.Draw had been changed,it use GlobalAlloc for TBitmap and
  TJPEG
• ggm

  November 2003 edited 7:57AM

  gordk wrote:

  This problem seems to be a very intermitent thing.I haven't been able to reproduce it on my own or customers systems.
  need all the info you can give
  customer environment- op system, printer, printer driver vers, vidcard and mem, system mem, network printer or local,
  report- does it produce a large number of pages,
  development system- os, ide ver.
  regards

  thanks for your regards,
  1、About the customer environment:
  OS: WinXP Professional(Service Pack 1)
  Printer: HP Deskjet 3420 series
  Printer driver vers:unknown
  System mem:256M
  Video card: 10Moons video baby(Bt878 compatible)
  local Printer
  2、Report:
  the largest images number of the Report is: 4
  with JPEG format and the size is 800X600
  the black rectangle is also appear while the selected images number is 2 or 3.
  3、development system:
  OS:WinXP Professional(Service Pack 1)
  IDE:DELPHI Enterprise 6
  FastReport:2.50
• binary South Africa

  November 2003 edited 7:57AM

  Hi I had the same problem all I did was change the BMP to a WMF and the problem never came back on XP.
• Samuray Administrator

  November 2003 edited 7:57AM

  Use FastReport 2.51, this problem in many events has fixed.