> >
> > the SVG just contains two lines of text:
> >
> > <?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
> > <svg encoding="ISO-8859-1" width="82.55mm" height="203mm"
> > text-rendering="optimizeLegibility">
> > <text x="0mm" y="10mm" style="font-size: 16.0pt">Line 1</text>
> > <text x="0mm" y="20mm" style="font-size: 16.0pt">Line 2</text>
> > </svg>
> >
>
>
> in svg with resolutions other than 72.0 dpi text is transformed twice:
>
> In RenderFreetype FT_Vector_Transform and FT_Glyph_Transform
> is called.
> In FT_Glyph_Transform FT_Vector_Transform is called, too.
>
> When I remove the call of FT_Vector_Transform in
> RenderFreetype the text is rendered as expected.
>
>
> file: magick\annotate.c
> function: RenderFreetype
> > FT_Vector_Transform(&glyph.origin,&affine);
> > (void) FT_Glyph_Transform(glyph.image,&affine,&glyph.origin);
>
> file: ttf\src\base\ftglyph.c:
> function: FT_Glyph_Transform
> > FT_Vector_Transform( &glyph->advance, matrix );
>
Hello,
I have checked that with ImageMagick-6.4.8-7.
The call to FT_Vector_Transform is needed at both positions (RenderFreetype in
annotate.c and FT_Glyph_Transform in ftglyph.c).
But the following block in RenderFreetype in annotate.c(line 1367-1380) should
be removed, because the "density"-scaling is already applied to the
draw_info->affine matrix
> if (draw_info->density != (char *) NULL)
> {
> GeometryInfo
> geometry_info;
>
> MagickStatusType
> flags;
>
> flags=ParseGeometry(draw_info->density,&geometry_info);
> resolution.x=geometry_info.rho;
> resolution.y=geometry_info.sigma;
> if ((flags & SigmaValue) == 0)
> resolution.y=resolution.x;
> }
These commands, using coders/svg.c, show different (corrected) behaviour:
convert -density 36 test.svg test_36.jpg
convert -density 72 test.svg test_72.jpg
convert -density 144 test.svg test_144.jpg
These commands, using librsvg, are not affected (Tested with
ImageMagick-6.4.1-0):
convert -density 36 test.svg test_36.jpg
convert -density 72 test.svg test_72.jpg
convert -density 144 test.svg test_144.jpg
These commands are not affected:
convert test_36.jpg -draw "text 10,10 Annotation" test_36_anno.jpg
convert test_72.jpg -draw "text 10,10 Annotation" test_72_anno.jpg
convert test_144.jpg -draw "text 10,10 Annotation" test_144_anno.jpg
By the way:
I had to change the source before compiling:
- In the function Magick::Image::map in Magick++/lib/Image.cpp(line 1253):
change "RemapImage" to "MagickCore::RemapImage"
- In the function MogrifyImage in wand/mogrify.c(line 1006-1025;line 1220-1236):
The encipher/decipher functions must be out-IF-DEFfed
#if defined(MAGICKCORE_CIPHER_SUPPORT)
if (LocaleCompare("decipher",option+1) == 0)
{
...
}
#endif
#if defined(MAGICKCORE_CIPHER_SUPPORT)
if (LocaleCompare("encipher",option+1) == 0)
{
...
}
#endif
- In the function FormatMagickSize in magick\string.c(line 1018):
change "MagickOffsetType" to "MagickOffsetSize"
Best regards
Thomas Stegemann
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