clipping region pointer.
* Provide _ScreenClipping() that only includes local and screen clipping but
not user clipping.
* Provide ScreenAndUserClipping() that returns screen clipping if no user
clipping is present, or returns a combined region that is then cached.
* Adapt all places where the former methods are used and decide which one to
use depending on the relevance of user clipping.
User clipping is now ignored for background clearing and when determining
whether or not to call Draw() on a view. This should make Haiku behaviourally
compatible with BeOS (confirmed by the ClippingAndRedraw test app) and should
also fix the Firefox redraw issues. Stephan please review!
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25854 a95241bf-73f2-0310-859d-f6bbb57e9c96
* It is necessary to store the local origin and scale of a view state, at
least for the clipping region and especially because the scale affects the
clipping region. Ie origin and scale of one state affect the clipping region,
at the time the clipping is evaluated, ie
SetOrigin(...);
ConstrainClippingRegion(...);
is equivalent to
ConstrainClippingRegion(...);
SetOrigin(...);
The current client provided clipping region at the time of PushState()
always constrains the region of the new state. The previous region
and the current local clipping may have their own individual origin and
scale.
To support all this, I needed to store origin and scale of each state on
the stack, but I do cache the combined origin and scale. Caching only
the combined region is not possible though. So the new implementation
is slower than the previous, but more correct.
* Refactored "copy constructor" from DrawState, which is not really a copy
constructor anyways, made it private. It is only used by PushState().
* Removed some dead code from DrawState.
All this improves Firefox redraw issues a tiny bit, but does not fix them.
Either I am not covering Firefox needs with my test app, or the bug is
somewhere else. At least Haiku behaves like BeOS with regard to client
clipping regions and the state stack now...
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24428 a95241bf-73f2-0310-859d-f6bbb57e9c96
(now WorkspacesView), OffscreenWindowLayer.
* Renamed ServerScreen.cpp/h to Screen.cpp/h (the class was already called
Screen).
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24303 a95241bf-73f2-0310-859d-f6bbb57e9c96
