TJPEGImage Members

The following tables list the members exposed by TJPEGImage.

	Name	Description
	_AddRef	Increments the reference count for the interfaced object's interface.
	_Release	Decrements the reference count for the interfaced object's interface.
	AssignTo	Copies the properties of an object to a destination object.
	Changed	Called when graphic has changed.
	DefineProperties	Provides an interface for a method that reads and writes otherwise unpublished data.
	DefineProperties	Set virtual property for reading and writing graphic data stream.
	Draw	Render graphic onto canvas at rectangle.
	DrawTransparent	Render graphic onto canvas at rectangle, blending with canvas's background.
	Equals	Compare graphic to another TGraphic object and return true if objects contain same graphic.
	Equals	This is the overview for the Equals method overload.
	FreeBitmap	This is FreeBitmap, a member of class TJPEGImage.
	GetEmpty	Indicates whether graphics object contains graphic.
	GetHeight	Get vertical size of graphic in pixels.
	GetOwner	Returns the owner of an object.
	GetPalette	Get color palette of graphical image.
	GetSupportsPartialTransparency	Indicate whether graphic supports partial transparency.
	GetTransparent	Specifies if graphic is drawn transparently.
	GetWidth	Get horizontal size of graphic in pixels.
	NewBitmap	This is NewBitmap, a member of class TJPEGImage.
	NewImage	This is NewImage, a member of class TJPEGImage.
	Progress	Generate OnProgress event when graphic is changing.
	ReadData	Read graphic data from TStream.
	ReadStream	This is ReadStream, a member of class TJPEGImage.
	SetHeight	Set vertical size of graphic in pixels.
	SetPalette	This is SetPalette, a member of class TJPEGImage.
	SetTransparent	Specify if graphic should be drawn transparently.
	SetWidth	Set horizontal size of graphic in pixels.
	WriteData	Write graphic data to TStream.

Protected Properties

	Name	Description
	Bitmap	This is Bitmap, a member of class TJPEGImage.

Public Events

	Name	Description
	OnChange	Occurs whenever a graphical image changes.
	OnProgress	Occurs when a graphical image is in the process of changing.

Public Methods

	Name	Description
	_AddRef	Increments the reference count for this interface.
	_Release	Decrements the reference count for this interface.
	AfterConstruction	Obtains a reference to the Owner's interface.
	AfterConstruction	Responds after the last constructor has executed.
	Assign	Copies the jpeg image object and creates a new reference to the internal data source object.
	BeforeDestruction	Responds before the first destructor executes.
	ClassInfo	Returns a pointer to the runtime type information (RTTI) table for the object type.
	ClassName	Returns a string indicating the type of the object instance (as opposed to the type of the variable passed as an argument).
	ClassNameIs	Determines whether an object is of a specific type.
	ClassParent	Returns the type of the immediate ancestor of a class.
	ClassType	Returns the class reference for the object's class.
	CleanupInstance	Performs finalization on long strings, variants, and interface variables within a class.
	Compress	Forces the action of compression.
	Create	Instantiates a jpeg image object.
	DefaultHandler	Provides the interface for a method that processes message records.
	Destroy	Destroys an instance of a jpeg image object.
	DIBNeeded	Decompress the jpeg image into a bitmap.
	Dispatch	Calls message-handling methods for the object, based on the contents of the Message parameter.
	FieldAddress	This is the overview for the FieldAddress method overload.
	Free	Destroys an object and frees its associated memory, if necessary.
	FreeInstance	Deallocates memory allocated by a previous call to the System::TObject::NewInstance method.
	GetHashCode	Returns an integer containing the hash code.
	GetInterface	Retrieves a specified interface.
	GetInterfaceEntry	Returns the entry for a specific interface implemented in a class.
	GetInterfaceTable	Returns a pointer to a structure containing all of the interfaces implemented by a given class.
	GetNamePath	Returns the name of the object as it appears in the Object Inspector.
	InheritsFrom	Determines the relationship of two object types.
	InitInstance	Initializes a newly allocated object instance to all zeros and initializes the instance's virtual method table pointer.
	InstanceSize	Returns the size in bytes of each instance of the object type.
	JPEGNeeded	Creates a new TJPEGData object if the jpeg image only has a bitmap and a jpeg is needed.
	LoadFromClipboardFormat	Reads in a jpeg image from the Clipboard into the jpeg image object.
	LoadFromFile	Loads a graphic image stored in a file.
	LoadFromStream	Loads the jpeg image from a stream.
	MethodAddress	This is the overview for the MethodAddress method overload.
	MethodName	Returns the name of a class method by address.
	NewInstance	Allocates memory for an instance of an object type and returns a pointer to that new instance.
	QueryInterface	Returns a reference to a specified interface if the object supports that interface.
	QueryInterface	Returns a reference to a specified interface if the object supports that interface.
	SafeCallException	Handles exceptions in methods declared using the safecall calling convention.
	SaveToClipboardFormat	Writes a jpeg image to a variable in Clipboard format.
	SaveToFile	Saves a graphics image to a file.
	SaveToStream	Writes the jpeg data to a stream.
	SetSize	Specifies the size of the graphic.
	ToString	Returns a string containing the class name.
	UnitName	Returns a string containing the unit name.

Public Properties

	Name	Description
	CompressionQuality	Indicates the trade-off ratio between the image quality and the file size.
	Empty	Indicates whether the graphics object contains a graphic.
	Grayscale	Determines whether the image output of a JPEG image is black and white, or color.
	Height	Specifies the vertical size of the graphic in pixels.
	Modified	Indicates whether the graphics object has been changed or edited.
	Palette	Indicates the color palette of the graphical image.
	PaletteModified	Indicates whether the palette has changed.
	Performance	Controls the trade-off between color quality and speed of decompression.
	PixelFormat	Determines whether the JPEG image is displayed in 24 or 8-bit format.
	ProgressiveDisplay	Controls how the image is displayed when decompressing files.
	ProgressiveEncoding	Determines whether an image can be progressively displayed when it is decompressed.
	Scale	Determines the size of the JPEG image when it is displayed.
	Smoothing	Determines whether the jpeg image displays in blocks or with blurred edges.
	SupportsPartialTransparency	Indicate whether graphic supports partial transparency or an alpha channel.
	Transparent	Indicates whether the image covers its rectangular area.
	Width	Determines the maximum width of the graphics object in pixels.

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