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[sfnt] Support variable 'COLR' v1 `PaintVarSkew*`. 

* src/sfnt/ttcolr.c (FT_PaintFormat_Internal): New enumeration values
`FT_COLR_PAINTFORMAT_INTERNAL_VAR_SKEW`,
`FT_COLR_PAINTFORMAT_INTERNAL_SKEW_CENTER`, and
`FT_COLR_PAINTFORMAT_INTERNAL_VAR_SKEW_CENTER`.
(read_paint): Handle new enumeration values.
This commit is contained in:
Dominik Röttsches 2022-07-05 15:16:31 +03:00 committed by Werner Lemberg
parent 44fd524ee4
commit 275b116b40
1 changed files with 49 additions and 4 deletions
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53
src/sfnt/ttcolr.c
View File

@ -81,7 +81,9 @@
FT_COLR_PAINTFORMAT_INTERNAL_VAR_ROTATE = 25,
FT_COLR_PAINTFORMAT_INTERNAL_ROTATE_CENTER = 26,
FT_COLR_PAINTFORMAT_INTERNAL_VAR_ROTATE_CENTER = 27,
FT_COLR_PAINTFORMAT_INTERNAL_SKEW_CENTER = 30
FT_COLR_PAINTFORMAT_INTERNAL_VAR_SKEW = 29,
FT_COLR_PAINTFORMAT_INTERNAL_SKEW_CENTER = 30,
FT_COLR_PAINTFORMAT_INTERNAL_VAR_SKEW_CENTER = 31,
} FT_PaintFormat_Internal;
@ -1117,12 +1119,17 @@
apaint->format = FT_COLR_PAINTFORMAT_ROTATE;
return 1;
}
else if ( apaint->format == FT_COLR_PAINTFORMAT_SKEW ||
else if ( apaint->format == FT_COLR_PAINTFORMAT_SKEW ||
(FT_PaintFormat_Internal)apaint->format ==
FT_COLR_PAINTFORMAT_INTERNAL_SKEW_CENTER )
FT_COLR_PAINTFORMAT_INTERNAL_VAR_SKEW ||
(FT_PaintFormat_Internal)apaint->format ==
FT_COLR_PAINTFORMAT_INTERNAL_SKEW_CENTER ||
(FT_PaintFormat_Internal)apaint->format ==
FT_COLR_PAINTFORMAT_INTERNAL_VAR_SKEW_CENTER )
{
apaint->u.skew.paint.p = child_table_p;
apaint->u.skew.paint.insert_root_transform = 0;
@ -1131,7 +1138,9 @@
apaint->u.skew.y_skew_angle = F2DOT14_TO_FIXED( FT_NEXT_SHORT( p ) );
if ( (FT_PaintFormat_Internal)apaint->format ==
FT_COLR_PAINTFORMAT_INTERNAL_SKEW_CENTER )
FT_COLR_PAINTFORMAT_INTERNAL_SKEW_CENTER ||
(FT_PaintFormat_Internal)apaint->format ==
FT_COLR_PAINTFORMAT_INTERNAL_VAR_SKEW_CENTER )
{
apaint->u.skew.center_x = INT_TO_FIXED( FT_NEXT_SHORT( p ) );
apaint->u.skew.center_y = INT_TO_FIXED( FT_NEXT_SHORT( p ) );
@ -1142,6 +1151,42 @@
apaint->u.skew.center_y = 0;
}
#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
if ( ( (FT_PaintFormat_Internal)apaint->format ==
FT_COLR_PAINTFORMAT_INTERNAL_VAR_SKEW ||
(FT_PaintFormat_Internal)apaint->format ==
FT_COLR_PAINTFORMAT_INTERNAL_VAR_SKEW_CENTER ) &&
VARIABLE_COLRV1_ENABLED )
{
var_index_base = FT_NEXT_ULONG( p );
if ( (FT_PaintFormat_Internal)apaint->format ==
FT_COLR_PAINTFORMAT_INTERNAL_VAR_SKEW )
{
if ( !get_deltas_for_var_index_base( face, colr, var_index_base, 2,
item_deltas ) )
return 0;
apaint->u.skew.x_skew_angle += F2DOT14_TO_FIXED( item_deltas[0] );
apaint->u.skew.y_skew_angle += F2DOT14_TO_FIXED( item_deltas[1] );
}
if ( (FT_PaintFormat_Internal)apaint->format ==
FT_COLR_PAINTFORMAT_INTERNAL_VAR_SKEW_CENTER )
{
if ( !get_deltas_for_var_index_base( face, colr, var_index_base, 4,
item_deltas ) )
return 0;
apaint->u.skew.x_skew_angle += F2DOT14_TO_FIXED( item_deltas[0] );
apaint->u.skew.y_skew_angle += F2DOT14_TO_FIXED( item_deltas[1] );
apaint->u.skew.center_x += INT_TO_FIXED( item_deltas[2] );
apaint->u.skew.center_y += INT_TO_FIXED( item_deltas[3] );
}
}
#endif
apaint->format = FT_COLR_PAINTFORMAT_SKEW;
return 1;