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[sfnt] Support for 'COLR' v1 variable transforms. 

* src/sfnt/ttcolr.c (FT_PaintFormat_Internal): New enumeration value
`FT_COLR_PAINTFORMAT_INTERNAL_VAR_TRANSFORM`.
(read_paint): Handle new enumeration value.
This commit is contained in:
Dominik Röttsches 2022-07-05 14:47:57 +03:00 committed by Werner Lemberg
parent 9c4ad2a901
commit 8ec531c26c
1 changed files with 26 additions and 1 deletions
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27
src/sfnt/ttcolr.c
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@ -69,6 +69,7 @@
FT_COLR_PAINTFORMAT_INTERNAL_VAR_LINEAR_GRADIENT = 5,
FT_COLR_PAINTFORMAT_INTERNAL_VAR_RADIAL_GRADIENT = 7,
FT_COLR_PAINTFORMAT_INTERNAL_VAR_SWEEP_GRADIENT = 9,
FT_COLR_PAINTFORMAT_INTERNAL_VAR_TRANSFORM = 13,
FT_COLR_PAINTFORMAT_INTERNAL_SCALE_CENTER = 18,
FT_COLR_PAINTFORMAT_INTERNAL_SCALE_UNIFORM = 20,
FT_COLR_PAINTFORMAT_INTERNAL_SCALE_UNIFORM_CENTER = 22,
@ -851,7 +852,9 @@
return 1;
}
else if ( apaint->format == FT_COLR_PAINTFORMAT_TRANSFORM )
else if ( apaint->format == FT_COLR_PAINTFORMAT_TRANSFORM ||
(FT_PaintFormat_Internal)apaint->format ==
FT_COLR_PAINTFORMAT_INTERNAL_VAR_TRANSFORM )
{
apaint->u.transform.paint.p = child_table_p;
apaint->u.transform.paint.insert_root_transform = 0;
@ -872,6 +875,28 @@
apaint->u.transform.affine.dx = FT_NEXT_LONG( p );
apaint->u.transform.affine.dy = FT_NEXT_LONG( p );
#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
if ( (FT_PaintFormat_Internal)apaint->format ==
FT_COLR_PAINTFORMAT_INTERNAL_VAR_TRANSFORM &&
VARIABLE_COLRV1_ENABLED )
{
var_index_base = FT_NEXT_ULONG( p );
if ( !get_deltas_for_var_index_base( face, colr, var_index_base, 6,
item_deltas ) )
return 0;
apaint->u.transform.affine.xx += (FT_Fixed)item_deltas[0];
apaint->u.transform.affine.yx += (FT_Fixed)item_deltas[1];
apaint->u.transform.affine.xy += (FT_Fixed)item_deltas[2];
apaint->u.transform.affine.yy += (FT_Fixed)item_deltas[3];
apaint->u.transform.affine.dx += (FT_Fixed)item_deltas[4];
apaint->u.transform.affine.dy += (FT_Fixed)item_deltas[5];
}
#endif
apaint->format = FT_COLR_PAINTFORMAT_TRANSFORM;
return 1;
}