Allow filtering RSXForm text in viewer.
Prior to this change Viewer would crash in debug or act quite strangely
in release when attempting to filter any RSXForm blobs. This adds the
ability to allocate an RSXForm run and directly query the number of
positioning scalers per glyph it contains.
Change-Id: I90e118102a0f4d535e97026eecad9ac2f70e448f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/367957
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
3 files changed