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3.8 KiB
3.8 KiB
SkAutoCanvasRestore Reference
class SkAutoCanvasRestore { SkAutoCanvasRestore(SkCanvas* canvas, bool doSave); ~SkAutoCanvasRestore(); void restore(); };
Stack helper class calls SkCanvas::restoreToCount when SkAutoCanvasRestore goes out of scope. Use this to guarantee that the canvas is restored to a known state.
SkAutoCanvasRestore(SkCanvas* canvas, bool doSave)
Preserves SkCanvas::save() count. Optionally saves SkCanvas clip and SkCanvas matrix.
Parameters
canvas |
SkCanvas to guard |
doSave |
call SkCanvas::save() |
Return Value
utility to restore SkCanvas state on destructor
Example
See Also
SkCanvas::save SkCanvas::restore
~SkAutoCanvasRestore()
Restores SkCanvas to saved state. Destructor is called when container goes out of scope.
See Also
SkCanvas::save SkCanvas::restore
void restore()
Restores SkCanvas to saved state immediately. Subsequent calls and ~SkAutoCanvasRestore() have no effect.
Example
Example Output
saveCanvas: false before restore: 2
saveCanvas: false after restore: 2
saveCanvas: true before restore: 2
saveCanvas: true after restore: 2
saveCanvas: false before restore: 2
saveCanvas: false after restore: 1
saveCanvas: true before restore: 2
saveCanvas: true after restore: 1
final count: 1