"Scott Nebor" on wrote...
| Has anyone ever noticed how fonts scale differently for different font
| sizes?
|
| For example, I have the following php code
|
| $MagickWand = NewMagickWand();
| MagickNewImage($MagickWand, 800,400);
| MagickSetFormat($MagickWand,"jpg");
| $dw = NewDrawingWand();
| DrawSetFontSize($dw, 10);
| $white = NewPixelWand("white");
| $black = NewPixelWand("black");
| DrawSetFillColor ($dw, $white);
| DrawRectangle($dw,0,0, 1000,1000);
| DrawSetFontWeight($dw, 100);
| $txt = "1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20\n";
| $txt .= "the quick brown fox jumped over the lazy dog";
| DrawSetFillColor ($dw, $black);
| DrawSetFontSize($dw, 20);
| DrawAnnotation($dw, 2, 20, $txt);
|
| DrawSetFontSize($dw, 15);
| DrawAnnotation($dw, 2, 100, $txt);
|
| MagickDrawImage($MagickWand, $dw);
| MagickEchoImageBlob($MagickWand);
|
| When the image spits out, the 'g' in dog lines up with that start of '19'
| for a font size of 20. However, for a font size of 15, the 'g' in dog lines
| up with the end of '19'. My understanding of true type fonts is that they
| should always appear and line up the same no matter which font size is used.
| Is this perhaps a deficiency of imagemagick?
|
| I tried this code both with and without using a true type font and the
| results are the same. If you do the same type of test in a word processor
| such as ms-word, the two different fonts line up the same.
|
This is a nice example of exactly what I have mentioned in IM Examples
http://www.cit.gu.edu.au/~anthony/graphics/imagick6/text/#pointsize
And what Glen reported.. If you have a reference to the contrary,
please mail us...
---IM Examples Quote---
The look of a font is also effected by the fonts "-pointsize" and
"-density".
If you just double the density ("-density 144"), a 12 point font will be
drawn with its dimensions doubled, should still look like the original
12 point font, just drawn at a larger scale with better smoothing of the
edges.
On the other hand doubling a points pointsize ("-pointsize 24") will
also produce a font that looks about the same size as one with doubled
density or resolution. However because a font is designed to look a
particular way, the thickness of lines in a font may not change much at
a larger point size.
Also at low resolutions the physical size limitations of the pixels may
effect the look of a font. So what looks good with one setting may not
be as good at another setting. It is all a very complex issue.
Basically changing the "-density" of a font will not generally produce
the same result as an equivelent change to a fonts "-pointsize".
Particularly with regard to line thickness and overall 'style' of the
font.
---END QUOTE---
Anthony Thyssen ( System Programmer ) <[EMAIL PROTECTED]>
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Exodendritic : to be out of your tree
-- Robert Langsford
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Anthony's Home is his Castle http://www.cit.gu.edu.au/~anthony/
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