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-rw-r--r--sdext/README5
1 files changed, 5 insertions, 0 deletions
diff --git a/sdext/README b/sdext/README
index b43d62b1fa92..a4f5cf654a11 100644
--- a/sdext/README
+++ b/sdext/README
@@ -18,3 +18,8 @@ source/presenter/ - Impress / Presenter Console.
ridiculous situations. Activating in response to
configuration keys (for example), and the 'XPresenterHelper'
interface inside sd/ used to create and manage windows.
+
+ The main screen uses a hardware-accelerated
+ canvas (e.g. cairo canvas), while the entire secondary screen
+ uses a VCL-canvas that is created in
+ sd::framework::FullScreenPane::CreateCanvas().