[Devel] xadvance descrepancy between bitmpats & glyphs?

[Ken Hancock]

I'm adding code to cache transformed bitmaps, among them italics and
stretched.

In my iFTFaceRequester I call FT_Set_Transform() to set a global transform
for any Face_ID which should be transformed.  I then have two routines which
use:

FTC_ImageCache_Lookup() to get the glyph->advance.x for line-layout and
FTC_SBitCache_Lookup() to get the sbit->xadvance for blitting

However, it looks like the advances are computed inconsistently:

In FT_Load_Glyph (irrelevant lines omitted):

    slot->advance.x = slot->metrics.horiAdvance;

    if ( ( load_flags & FT_LOAD_IGNORE_TRANSFORM ) == 0 )
    {
        /* transform advance */
        FT_Vector_Transform( &slot->advance, &internal->transform_matrix );
    }  

In ftc_snode_load (irrelevant lines omitted):

      xadvance = ( slot->metrics.horiAdvance + 32 ) >> 6;


slot->metrics.horiAdvance is UNTRANSFORMED

Shouldn't ftc_snode_load use:

          xadvance = (slot->advance.x + 32 ) >> 6;
          yadvance = (slot->advance.y + 32 ) >> 6;

Thanks in advance!

Ken