SkAutoCanvasRestore Reference

Automatic Canvas Restore

Overview

Overview Subtopic

name	description
Constructor	functions that construct SkAutoCanvasRestore
Member Function	static functions and member methods

Class SkAutoCanvasRestore

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.

Constructor

name	description
SkAutoCanvasRestore(SkCanvas* canvas, bool doSave)	preserves Canvas save count
~SkAutoCanvasRestore()	restores Canvas to saved state

Member Function

name	description
restore	restores Canvas to saved state

SkAutoCanvasRestore

Preserves Canvas save count. Optionally saves Canvas Clip and Canvas Matrix.

Parameters

Return Value

utility to restore Canvas state on destructor

Example

See Also

SkCanvas::save SkCanvas::restore

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~SkAutoCanvasRestore

Restores Canvas to saved state. Destructor is called when container goes out of scope.

See Also

SkCanvas::save SkCanvas::restore

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restore

Restores Canvas 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

See Also

SkCanvas::save SkCanvas::restore

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