crates/canvas/src/interaction/mod.rs   |  30 ++---
 crates/canvas/src/interaction/tests.rs | 173 +++++++++++++++++++++++++-
 crates/canvas/src/reading.rs           | 208 +++++++++++++++++++-------------
 crates/mobile/src/tests.rs             | 102 ++++++++++++++++
 4 files changed, 411 insertions(+), 102 deletions(-)