L_FreeRadBendBitmap

#include "l_bitmap.h"

L_INT EXT_FUNCTION L_FreeRadBendBitmap(pBitmap, pnCurve, uCurveSize, uScale, CenterPt, crFill, uFlags)

pBITMAPHANDLE pBitmap;	/* pointer to the bitmap handle */
L_INT L_FAR * pnCurve;	/* array of integer values */
L_UINT uCurveSize;	/* array size */
L_UINT uScale;	/* scaling factor */
POINT CenterPt;	/* center point */
COLORREF crFill;	/* background color */
L_UINT uFlags;	/* flags */

Wraps the bitmap along its radius on a 3D surface shaped by pnCurve. This function is available in the Raster Pro and above toolkits.

Parameter	Description
pBitmap	Pointer to the bitmap handle referencing the bitmap to be changed.
pnCurve	Array of integers that represent surface shape values. Valid values for each element in the pnCurve array range between –1000 and 1000. Positive values mean the curve is concave in and negative values mean the curve is concave out. The values in this array are internally divided by 1000.
uCurveSize	Size of the pnCurve array. This can be any number, up to the size of the available buffer.
uScale	Factor used to multiply the various amplitude values in the pnCurve array. Each value in the pnCurve array is multiplied by this factor. For example, if you want to double the size of the amplitude values, use a uScale value of 2; to triple the amplitudes values, use a uScale value of 3, etc. The top practical limit for this parameter is the width and height of pBitmap.
CenterPt	POINT structure that contains the surface center.
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.
uFlags	Flags that indicate how to handle peripherally exposed areas and areas exposed inside the surface. You can use a bit wise 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 exposed areas inside the surface:
	Value	Meaning
	FILL_ROT	[0x0000] Rotate the image inside the surface pattern.
	FILL_WOUTROT	[0x0010] Fill the exposed center the same way the peripherally exposed areas are filled.

Returns

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

Comments

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.

To update a status bar or detect a user interrupt during execution of this function, refer to L_SetStatusCallback.

For an example, the following figure shows a bitmap before the effect is applied.

$image\FreeRadBend_Before.gif$

The following figure shows the same bitmap after the effect has been applied.

$image\FreeRadBend_After.gif$

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.

Required DLLs and Libraries

LTIMG

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

Windows 95 / 98 / Me, Windows 2000 / XP.

See Also

Functions:	L_AddBitmapNoise, L_EmbossBitmap, L_MosaicBitmap, L_MotionBlurBitmap, L_OilifyBitmap, L_PosterizeBitmap, L_RemoveRedeyeBitmap, L_SolarizeBitmap, L_UnderlayBitmap, L_BumpMapBitmap, L_CubismBitmap, L_DrawStarBitmap, L_GlowFilterBitmap, L_FreePlaneBendBitmap, L_DryBitmap, L_OceanBitmap, L_GlassEffectBitmap, L_LensFlareBitmap, L_LightBitmap, L_PlaneBendBitmap, L_PlaneBitmap, L_SampleTargetBitmap, L_TunnelBitmap, L_BendingBitmap, L_CylindricalBitmap, L_FreeHandShearBitmap, L_FreeHandWaveBitmap, L_ImpressionistBitmap, L_PixelateBitmap, L_PolarBitmap, L_PunchBitmap, L_RadialBlurBitmap, L_RadWaveBitmap, L_RippleBitmap, L_SpherizeBitmap, L_SwirlBitmap, L_WaveBitmap, L_WindBitmap, L_ZoomBlurBitmap, L_ZoomWaveBitmap, L_AdjustBitmapTint, L_ColorHalfToneBitmap
Topics:	Raster Image Functions: Doing Geometric Transformations
	Applying Artistic Effects
	Raster Image Functions: Correcting Colors

Example

BITMAPHANDLE LeadBitmap;   /* Bitmap handle for the image */
POINT apUserPoint [4];
L_INT pnCurve[13];
POINT CenterPt;
L_UINT uCurveSize;

/* Load a bitmap at its own bits per pixel  */
L_LoadBitmap(TEXT("IMAGE3.CMP"), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL);

/* Apply the filter*/
apUserPoint [0].x = 0;
apUserPoint [0].y = 0;
apUserPoint [1].x = 3;
apUserPoint [1].y = 10;
apUserPoint [2].x = 9;
apUserPoint [2].y = -10;
apUserPoint [3].x = 12;
apUserPoint [3].y = 0;

L_GetCurvePoints(pnCurve, apUserPoint, 4, NULL, GUB_LINEAR);

CenterPt.x  =  LeadBitmap.Width/2;
CenterPt.y  =  LeadBitmap. Height/2;
uCurveSize = 13;

L_FreeRadBendBitmap(&LeadBitmap, pnCurve, uCurveSize,200,  CenterPt, RGB(255,0,0), FILL_CLR | FILL_ROT);