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Font size

Posted on 2004-09-14
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Last Modified: 2013-12-03
How to konw the exact size of a font from the point size to implement in an IFont->put_size?

For example:

Point size 8 is actually 8.25
Point size 9 is actually 9
Point size 10 is actually 9.75
Point size 11 is actually 11.25
Point size 12 is actually 12
Point size 14 is actually 14.25

Thanks
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Question by:DAE
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6 Comments
 
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Expert Comment

by:nonubik
ID: 12062651
HRESULT put_Size(
  CY size  //Size of the font
);
size of the font expressed in a 64-bit CY variable. The upper 32-bits of this value contains the integer point size and the lower 32-bits contains the fractional point size.
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Accepted Solution

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curero earned 125 total points
ID: 12483750
 
   lfHeight = -MulDiv(PointSize, GetDeviceCaps(hDC, LOGPIXELSY), 72);

   (see http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/fontext_1wmq.asp )
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Author Comment

by:DAE
ID: 12560800
I need exactly the opposite.

I have the Height of the font, but I need to convert that Height in to PointSize (Not the rounded PointSize the exact PointSize). See my original post.
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Expert Comment

by:curero
ID: 12566624
Well, not sure if I understood you, but if  ' height = f (point_size) ' and the function f  is bijective then you can calculate point_size=inverse_f( height).
   
 double  dPointSize = (double)(-lfHEight * 72)/GetDeviceCaps(hDC, LOGPIXELSY);

 Am I missing something?
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