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Back to article list Search Articles Add Comment Printer friendly Direct link Par2: PDF class fix for large font on desktop 2009-02-20 -- Arnor Baldvinsson Here is information about how I fixed the PDF target class so that it will
not mess up the PDF generation on computers that don't use the default 96dpi
screen resolution. This involves adding a single method to the
PDFGeneratorClass class in ABPRPDF.INC and ABPRPDF.CLW:
Add to class declaration in ABPRPDF.INC (I put it in at the top of the
method list, around line 195):
AdjustDPIValues PROCEDURE(Long pValue),Long
!! AB 2009-02-19 Adjusts DPI values
In the classfile, ABPRPDF.clw, I added this:
PDFGeneratorClass.AdjustDPIValues PROCEDURE(Long pValue)!!,Long
!! AB 2009-02-19 Adjusts DPI values
HDcScreen UNSIGNED
IDPI Long
R Real
L Long
Code
R = 1
HDcScreen = GetDC(0)
If HDcScreen <> 0
IDPI = GetDeviceCaps(HDcScreen, 88)
L = ReleaseDC(0, HDcScreen)
R = IDPI/96
End
Return (pValue / R)
In PDFGeneratorClass.AddFontDescriptor method, you have code like this:
!SET the fonts Width
LOOP LOC:I=SELF.FontsNames.FirstChar TO SELF.FontsNames.LastChar
LOC:CharToTest=CHR(LOC:I)
IF GetTextExtentPoint32(LOC:DC,LOC:CharToTest, 1,LOC:CharSize)<>0 THEN
IF LOC:Subclasing THEN
IF SELF.FontsNames.CharWidth[LOC:I] THEN
SELF.FontsNames.CharWidth[LOC:I] = LOC:CharSize.eW
END
ELSE
SELF.FontsNames.CharWidth[LOC:I] = LOC:CharSize.eW
END
END
END
I changed both of the assignments to the CharWidth to:
SELF.FontsNames.CharWidth[LOC:I] = SELF.AdjustDPIValues(LOC:CharSize.eW)
In PDFGeneratorClass.GetTextWidth method, you have code like this:
IF SelectObject(LOC:DC, LOC:HFont) THEN
RV = GetTextExtentPoint32(LOC:DC,pText, LEN(pText),LOC:CharSize)
LOC:OLDMAPMODE=SetMapMode(LOC:DC,LOC:OLDMAPMODE)
DeleteObject(LOC:HFont)
RETURN LOC:CharSize.eW + (LOC:CharSize.eW/20)
END
I changed the RETURN to adjust the value:
RETURN SELF.AdjustDPIValues(LOC:CharSize.eW + (LOC:CharSize.eW/20))
This takes care of the font sizing problem in any DPI combination that I
threw at it:)
Thanks to Lee White for putting me on the right track with the DPI:)
Today is May 1, 2024, 4:06 pm This article has been viewed 35127 times.
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