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LBitmap::Bending

Summary

Warps the active bitmap along a curved plane, centered on the pivot point.

Syntax

#include "ltwrappr.h"

virtual L_INT LBitmap::Bending (nValue, CenterPt, crFill, uFlags)

Parameters

L_INT nValue

Amount of stretching, where positive values stretch the pixels toward edges, and negative values stretch the pixels toward the center. Possible values range from -500 to 500.

POINT CenterPt

A POINT structure that contains the center of the arc. This is ignored when either BND_HORZ or BND_VERT is set in the uFlags parameter.

COLORREF crFill

The COLORREF value that specifies the fill color for any exposed areas. You can specify a COLORREF value, such as the return value of the Windows RGB macro, or you can use the PALETTEINDEX macro to specify a palette color.

L_UINT uFlags

Flags that indicate how to handle peripherally exposed areas, how to handle centrally exposed areas and the type of bending. You can use a bitwise OR ( | ) to specify one flag from each group.

The following are the flags that indicate how to handle peripherally exposed areas:

Value	Meaning
FILL_CLR	[0x0000] Fill any exposed areas with crFill.
FILL_RPT	[0x0001] Stretch the image edges to fill the exposed area.
FILL_NOCHG	[0x0002] Leave the exposed area as is, without changing it.

The following are the flags that indicate how to handle an exposed center:

Value	Meaning
FILL_ROT	[0x0000] Rotate the image inside the arc pattern.
FILL_WOUTROT	[0x0010] Fill the exposed center as you would any other exposed area. This is determined by setting the FILL_CLR, FILL_RPT or FILL_NOCHG flags.
	This flag is ignored if the nValue is negative.

The following are the flags that indicate how the bitmap is bent:

Value	Meaning
BND_NORM	[0x0000] Stretch the image along the vertical and horizontal planes.
BND_HORZ	[0x0100] Stretch the image along the horizontal plane.
BND_VERT	[0x0200] Stretch the image along the vertical plane.

Returns

Value	Meaning
SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

The function bends the image around the specified CenterPt. The center point must be defined inside the bitmap or inside the region, if the bitmap has a region. If the bitmap has a region, the effect will be applied on the region only.

This function supports 12 and 16-bit grayscale and 48 and 64-bit color images. Support for 12 and 16-bit grayscale and 48 and 64-bit color images is available only in the Document/Medical toolkits.

This function does not support signed data images. It returns the error code ERROR_SIGNED_DATA_NOT_SUPPORTED if a signed data image is passed to this function.

This function does not support 32-bit grayscale images. It returns the error code ERROR_GRAY32_UNSUPPORTED if a 32-bit grayscale image is passed to this function.

Bend Function - Before

Bend Function - After

View additional platform support for this Bend function.

Required DLLs and Libraries

LTIMGSFX
For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Platforms

Win32, x64.

Example

L_INT LBitmap__BendingExample(LAnimationWindow * LAniWnd)  
{ 
   POINT pt;  
 
   pt.x = 100;  
   pt.y = 100;  
 
   return LAniWnd->Bending(20, pt, RGB(200,120,30), FILL_CLR);  
 
}