Class VLImageDisplay.TVLImageDisplayLayer
From Mitov Wiki Doc
This is a Beta Read Only version of this page. Please review and send recommendations to mitov@mitov.com. We will enable the editing as soon as we are happy with the overall Wiki site.
Package: VideoLabBasicPkg
Unit: VLImageDisplay
Inherits: TVLImageDisplay
Contents |
Syntax
Delphi:
type TVLImageDisplayLayer = class( TVLImageDisplay, ILPDrawItem )
C++ Builder:
class TVLImageDisplayLayer : public TVLImageDisplay
Visual C++ (MFC):
class CTVLImageDisplayLayer : public CTVLImageDisplay
C# (.NET):
public ref class TVLImageDisplayLayer : Mitov.VideoLab.ImageDisplay
Summary
Layer drawing video.
Description
Add this layer to draw video over the frames.
Diagram:
Example:
Methods
Public
- procedure DoLayerBegin(ACanvas : TLPCanvas; AWidth : Integer; AHeight : Integer; AXCoeff : Single; AYCoeff : Single)
- procedure DoLayerEnd()
- procedure DoLayerDraw(ACanvas : TLPCanvas; AWidth : Integer; AHeight : Integer; AXCoeff : Single; AYCoeff : Single; AContoursOnly : Boolean)
- procedure DoLayerMouseMove(AShift : TShiftState; AX : Integer; AY : Integer)
- procedure DoLayerMouseDown(Button : TMouseButton; Shift : TShiftState; X : Integer; Y : Integer)
- procedure DoLayerMouseUp(Button : TMouseButton; Shift : TShiftState; X : Integer; Y : Integer)
- procedure DoLayerMouseWheelDown(AShift : TShiftState; AX : Integer; AY : Integer)
- procedure DoLayerMouseWheelUp(AShift : TShiftState; AX : Integer; AY : Integer)
- procedure DoLayerMouseEnter()
- procedure DoLayerMouseLeave()
- function GetChachedData(ALink : TObject) : TObject
- procedure SetChachedData(ALink : TObject; AData : TObject)
- function GetOperations() : TLPDrawLayerOperations
- procedure AddLayerLink(ALink : TLPLayerCollectionItem)
- procedure RemoveLayerLink(ALink : TLPLayerCollectionItem)
- function GetName() : String
- function WriteLock() : IOWLockSection
- procedure SetBounds(ALeft : Integer; ATop : Integer; AWidth : Integer; AHeight : Integer)
From TVLImageDisplay
Properties
Published
- RenderMode - Specifies the desired rendering mode.
Methods
Public
- procedure DrawTo(AGraphics : IGPGraphics; AContoursOnly : Boolean; AWidth : Single; AHeight : Single)
- procedure Clear() - Clears the Display.
- procedure Invalidate()
From TVLCommonImageDisplay
Properties
Published
- AutoClear - Auto clear the display at the end of the video.
- AspectRatio - Specifies the desired aspect ration for the display.
- TabStop
Methods
Public
- procedure Clear() - Clears the display.
- procedure DisplayBitmap(ABitmap : TBitmap) - Displays the content of a bitmap.
- procedure DisplayBitmap(ABitmap : TVLBitmap) - Displays the content of a bitmap.
- procedure DisplayImage(AImage : IVLImageBuffer) - Displays the content of an image buffer.
Pins
- InputPin - The Video Input Pin of the display.
- UserControlOutputPin - User control source pin.
From TVLCommonDisplay
Properties
Published
- AutoSize - Auto-size to display to the video size.
- Center - Center the image in the display.
- Stretch - Stretch the image to the display size.
- StretchMax - Stretches the image to fill completely the frame, while preserving the aspect ration.
- Proportional - Keep the image proportional(Preserve aspect ratio).
- Color
Public
- ImageHeight - Returns the Height of the image in the display.
- ImageWidth - Returns the Width of the image in the display.
- ImageTop - Returns the Top position of the image in the display.
- ImageLeft - Returns the Left position of the image in the display.
Methods
Public
- procedure SetParent(AParent : TWinControl)
- function ScreenToImage(AValue : TPoint) : TPoint - Converts from screen coordinates into video frame coordinates.
