Commit e7ac9288acde8ad21c96ad9c448ad2b2cfc9fe6a
2019-06-13T00:17:36
[smooth] Restore the span buffering for direct mode only. The buffer size FT_MAX_GRAY_SPANS is set to 10 spans, which should be enough to cover the entire scanline for simple glyphs in most cases: each slightly slanted edge needs up to two spans, plus a filling span in-between. This is not new, we used to do it before cb4388783cecc. * src/smooth/ftgrays.c (gray_TWorker): Add `spans' and `num_spans'. (gray_hline, gray_sweep): Implement the span buffering. (gray_raster_render): Use negative `num_spans' to avoid the direct mode.