• Zhiyi Zhang's avatar
    dwrite: Use cache when font transform matrix contains only translation offsets. · f2df5a6c
    Zhiyi Zhang authored
    Word 2016 queries a lot of font glyph bounding boxes and bitmaps with translation matrices. The
    result of these queries is not cached because the transform matrix is not the identity matrix.
    However, the translation offsets don't affect FreeType font operations at all, which can be
    verified in ft_matrix_from_dwrite_matrix() called by get_glyph_transform(). So these results with
    translation matrices can be cached as well. With this patch, Word 2016 stuttering is reduced
    significantly.
    f2df5a6c
dwrite_private.h 31.4 KB