CombineWarp method (Main Control)

Builder Syntax	int CombineWarp(const TPoint * ptDstArray, TBitmapHandle BitmapSrc, const TPoint &ptSrc, int nSrcWidth, int nSrcHeight, unsigned uFlags);
Delphi Syntax	Function CombineWarp (ptDstArray: TLEADCombineWarpDstPointsArray; BitmapSrc: TBitmapHandle; ptSrc: TPoint; nSrcWidth: L_INT; nSrcHeight: L_INT; uFlags: L_UINT ): L_INT;
Overview	Refer to Combining Images.

Remarks

Combines image data from the source bitmap (the slave) and the destination bitmap (the master bitmap, already loaded in the Main control), using a perspective warp.

You can warp the entire source bitmap, or a portion of the source bitmap. To warp a portion of the source bitmap, set ptSrc, nSrcWidth and nSrcHeight accordingly. To warp the entire source bitmap, set the following:

ptSrc.x = 0;
ptSrc.y = 0;
nSrcWidth =BitmapWidth of BitmapSrc;
nSrcHeight = BitmapHeight of BitmapSrc;

The warp area in the destination bitmap is specified in ptDstArray. The polygon specified in ptDstArray must:

$image\sqrblit.gif$ be concave.

$image\sqrblit.gif$ fit entirely on the destination bitmap.

If either of these conditions is FALSE, this method will return an error.

The ordering of the points in ptDstArray can affect the resulting warp. For example, if the source bitmap is the following:

$image\WarpEx1.gif$

then ordering the points in ptDstArray as shown below results in the following warp:

$image\WarpEx2.gif$

while ordering the points in ptDstArray as shown below, results in the following warp:

$image\WarpEx3.gif$

Element:	Combine method, Underlay metho
Topics:	Raster Images: Combining Images
	Examining and Altering Bitmaps