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[ft-paint] Implement FT_COLR_PAINTFORMAT_ROTATE

This commit is contained in:
Behdad Esfahbod 2022-12-22 17:54:01 -07:00
parent 16598e024b
commit ddbe4e52ec
1 changed files with 19 additions and 1 deletions
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20
src/hb-ft-colr.hh
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@ -188,7 +188,25 @@ _hb_ft_paint (FT_OpaquePaint opaque_paint,
paint_funcs->pop_transform (paint_data);
}
break;
case FT_COLR_PAINTFORMAT_ROTATE: break;
case FT_COLR_PAINTFORMAT_ROTATE:
{
float a = paint.u.rotate.angle / 65536.f;
float cc = cosf (a * (float) M_PI);
float ss = sinf (a * (float) M_PI);
paint_funcs->push_transform (paint_data,
1.f, 0.f, 0.f, 1.f,
-paint.u.rotate.center_x / 65536.f,
-paint.u.rotate.center_y / 65536.f);
paint_funcs->push_transform (paint_data, cc, ss, -ss, cc, 0., 0.);
paint_funcs->push_transform (paint_data,
1.f, 0.f, 0.f, 1.f,
+paint.u.rotate.center_x / 65536.f,
+paint.u.rotate.center_y / 65536.f);
paint_recurse (paint.u.rotate.paint);
paint_funcs->pop_transform (paint_data);
paint_funcs->pop_transform (paint_data);
paint_funcs->pop_transform (paint_data);
}
case FT_COLR_PAINTFORMAT_SKEW: break;
case FT_COLR_PAINTFORMAT_COMPOSITE:
{