TWidgetSet.MaskBlt function

Member of TWidgetSetpublicIn unit InterfaceBase

Copies part of a source DC into an destination DC, using the specified foreground and background raster operations.

Declaration

pascal

function MaskBlt(DestDC: HDC; X: Integer; Y: Integer; Width: Integer; 
 Height: Integer; SrcDC: HDC; XSrc: Integer; 
 YSrc: Integer; Mask: HBITMAP; XMask: Integer; 
 YMask: Integer; Rop: DWORD): Boolean; virtual
function MaskBlt(DestDC: HDC; X: Integer; Y: Integer; Width: Integer; 
 Height: Integer; SrcDC: HDC; XSrc: Integer; 
 YSrc: Integer; Mask: HBITMAP; XMask: Integer; 
 YMask: Integer): Boolean; virtual

Arguments

`DestDC`	The destination device context.
`X`	The origin of the destination rectangle.
`Y`	The origin of the destination rectangle.
`Width`	The size of the destination rectangle.
`Height`	The size of the destination rectangle.
`SrcDC`	The source device context.
`XSrc`	The origin of the source rectangle.
`YSrc`	The origin of the source rectangle.
`Mask`	The monochrome mask bitmap handle, can be zero.
`XMask`	The origin of the mask rectangle.
`YMask`	The origin of the mask rectangle.
`Rop`	The raster operations (optional).

Function result

False on failure.

Description

MaskBlt behaves like BitBlt when no mask bitmap is specified. It does a SRCOPY operation when also no Rop is specified. See BitBlt for general information about raster operations.

Rop contains both a foreground and a background raster operation (see MakeROP4). When a (monochrome) mask bitmap is present, its bits select either the foreground (1) or background (0) raster operation.

TWidgetSet.MaskBlt function

Declaration

Arguments

Function result

Description

See also