Declarations

procedure Changed; overload; override;
procedure Changed(const Area: TRect; const Info: Cardinal = AREAINFO_RECT); reintroduce; overload; virtual;

Overload Details

Overload 1

procedure Changed; overload; override;

Triggers change notification across the entire bitmap surface.

Overload 2

procedure Changed(const Area: TRect; const Info: Cardinal = AREAINFO_RECT); reintroduce; overload; virtual;

Triggers change notification for a specified modified sub-rectangle region.

Parameter	Type	Description
Area	TRect	Modified sub-rectangle area of the bitmap surface.
Info	Cardinal	Area information flag (default AREAINFO_RECT).

Description

Changed signals that pixel contents have been modified.

Calling Changed invalidates backend cache surfaces and fires OnChange and OnAreaChanged events.

Example

Bitmap.Changed(Rect(10, 10, 50, 50));