TCustomBitmap

type TCustomBitmap = class(TRasterImage)

protected

  procedure MaskHandleNeeded; override;

Ensures that a handle is allocated for the image mask (when needed).

  procedure PaletteNeeded; override;

Ensures that a handle is allocated for the Palette in the image.

  function CanShareImage(); override;

Indicates if the image uses the specified shared image class.

  procedure Changed(); override;

Performs actions needed when the image data for the bitmap has been changed.

  function CreateDefaultBitmapHandle(); override;

Creates a handle for the bitmap using the bitmap handle type in the bitmap image data.

  procedure FreeMaskHandle;

FreeMaskHandle - method to release Mask handle.

  function GetBitmapHandle; override;

Gets the value for the Handle property.

  function GetMaskHandle; override;

Gets the value for the MaskHandle property.

  function GetPalette; override;

Gets the value for the Palette property.

  function GetPixelFormat; override;

Gets the value for the PixelFormat property.

  function GetRawImagePtr; override;

Gets a pointer with the raw image data.

  function GetRawImageDescriptionPtr; override;

Gets a pointer to the image descriptor for the shared Bitmap image.

  class function GetSharedImageClass; override;

Gets the class reference used to create new shared image instances in the class.

  procedure HandleNeeded; override;

Ensures that the handle for the bitmap has been assigned.

  function InternalReleaseBitmapHandle; override;

  function InternalReleaseMaskHandle; override;

  function InternalReleasePalette; override;

InternalReleasePalette - releases Palette Handle and returns its value.

  procedure RawimageNeeded();

Ensures that the RawImage data is allocated prior to use.

  procedure SetHandle(); override;

Re-implements the method from the ancestor class.

  procedure SetPixelFormat(); override;

Sets the value for the PixelFormat property.

  procedure UnshareImage(); override;

Frees the shared image in the bitmap, and creates a new one.

  function UpdateHandles(); override;

Sets the handles for the image and mask in the shared Bitmap to the specified values.

public

  constructor Create; override;

Constructor for the class instance.

  destructor Destroy; override;

Destructor for the class instance.

  procedure Assign(); override;

Copies values from the specified persistent object into the class instance.

  procedure Clear; override;

Clears the content for the bitmap image.

  procedure FreeImage; override;

Releases the resources for the image when it is discarded.

  function LazarusResourceTypeValid(); override;

Determines if the specified resource type is valid for the image format.

  function BitmapHandleAllocated; override;

Returns True if a handle has been allocated for the Bitmap.

  function MaskHandleAllocated; override;

Determines if the mask handle has been allocated for the image.

  function PaletteAllocated; override;

Indicates whether a handle has been allocated for a palette in the image.

  function ReleaseHandle;

Releases the bitmap handle for the shared image.

  procedure SetHandles(); override;

Sets handles for the bitmap and the mask to the specified values.

  procedure SetSize(); override;

Sets the Height and Width for the image to the specified values.

  property Handle: HBITMAP; [rw]

The operating system Handle associated with this bitmap.

  property HandleType: TBitmapHandleType; [rw]

Handle type for the Bitmap.

  property Monochrome: Boolean; [rw]

True when the image contains monochrome image data.

end;

TCustomBitmap

TCustomBitmap - the base class for TBitmap.

TRasterImage

TRasterImage - base class for a number of graphic controls, including TCustomBitmap and TCustomIcon, which use a raster of dots to display graphic information.

TGraphic

Abstract base class used for images in supported image formats.

TPersistent,IFPObserved

TObject