<< Click to Display Table of Contents >> Navigation:  Commands > Printing (on device)

WPViewPDF is also able to print certain PDF pages to a windows device handle (HDC).

The printing will be internally done by GDI+.

 

COMPDF_DisablePrintHDC = 126

 

Disable print to HDC - it is not possible to enable again!

 

COMPDF_PrintHDC_SelectPage  = 160

 

Select the page to be printed next

 

COMPDF_PrintHDC_SelectedPage = 161

 

Print the selected page on the HDC device with the handle passes as IntParam. The result value is -1 on error or the printed with and height as high and low word.

 

Note: Delphi Developers please use Canvas.Lock / CanvasUnlock when using Canvas.Handle.

 

If you need to use the standard GDI renderer with PrintHDC please use command

  COMPDF_UseGDIPainter with parameter -2. To activate the default GDI+ renderer use parameter -1.

 

 

 

COMPDF_UseGDIForPrinting   = 145

 

Select the standard GDI renderer instead of GDIPLUS, with parameter=1 or the GDIPLUS render with parameter=0 (default).

 

This only changes the printing, not the display!

 

Using 1 can result in smaller print files and faster output. For difficult PDF files it can cause a decrease in output quality. When using pdfPrint use option "STDGDI=1".

 

COMPDF_PrintHDCSetXRes = 152

 

Set X Resolution for the next COMPDF_PrintHDC. Use negative value to set desired width in pixels.

 

COMPDF_PrintHDCSetYRes     = 153

 

Set Y Resolution for the next COMPDF_PrintHDC. Use negative value to set desired height in pixels.