Hello Albert,
You're not giving a lot of details here, but:
- you're not using glyph->metrics.horiBearingX at all, while
you should be comparing the glyph's xmax with its advance
(i.e. horiBearingX+width to horiAdvance)
horiBearingX should also be used for positioning the glyphs
- even when positioning with horiBearingX, it's perfectly ok
for some glyphs to have an advance smaller than the xmax
(e.g. most italic fonts). It really depends on the design
of the font
- in case you haven't read the documentation, be aware that
the glyph metrics are *not* transformed when using
FT_Set_Transform()
- since you call FT_Render_Glyph to generate a bitmap, you'd
better use glyph->bitmap_left and glyph->bitmap_top, as well
as glyph->bitmap.width and glyph->bitmap.rows to position
it correctly.
these will correspond to the transformed glyph.
I don't know if this helps,
Regards,
- David Turner
- The FreeType Project (www.freetype.org)
On Mon, 4 Dec 2006 20:52:55 +0100, "Albert Torras" <[EMAIL PROTECTED]> said:
> Hi,
>
> I work with freetype 2.1.10 crosscompiled for ARM and it works quite
> fine.
>
> However, I have some problems with horiAdvance... It happens that
> sometimes
> the face->glyph->metrics.width is a higher value than face->glyph->
> metrics.horiAdvance,
> and it produces the overlapping of strings, because I increment the pen
> position according to the value of horiAdvance.
>
> I can't understand why this happens.
>
> An example of the code used is pasted below:
>
> *// 90ยบ clockwise rotation*
> matrix.xx = (FT_Fixed) ( 0 * 0x10000L);
> matrix.xy = (FT_Fixed) ( 1 * 0x10000L);
> matrix.yx = (FT_Fixed) ( -1 * 0x10000L);
> matrix.yy = (FT_Fixed) ( 0 * 0x10000L);
>
> *// Loop*
> *for* (n=0; n < strlen(text); n++) {
>
> FT_Set_Transform(face, &matrix, &pen);
>
> */* retrieve glyph index from character code */*
> glyph_index = FT_Get_Char_Index( face, text[n] );
>
> */* load glyph image into the slot (erase previous one) */*
> FT_Load_Glyph( face, glyph_index, FT_LOAD_DEFAULT );
>
> */* convert to an anti-aliased bitmap */*
> FT_Render_Glyph( face->glyph, FT_RENDER_MODE_NORMAL );
>
> printf("\nWidth: %d Advance:
> %d\n",face->glyph->metrics.width,face->glyph->metrics.horiAdvance);
>
> }
>
>
> And here are some of the results I get from printf...
>
> Width: 576 Advance: 576 OK!
> Width: 640 Advance: 576 Not OK
> Width: 576 Advance: 512 Not OK
> Width: 192 Advance: 256 OK
> Width: 576 Advance: 512 Not OK
>
>
> Does anybody know why??
>
> Thanks a lot for your help.
> Albert
_______________________________________________
Freetype-devel mailing list
Freetype-devel@nongnu.org
http://lists.nongnu.org/mailman/listinfo/freetype-devel
