L_RevEffectBitmap

#include "l_bitmap.h"

L_LTIMGSFX_API L_INT L_RevEffectBitmap(pBitmap, uLineSpace, uMaximumHeight, uFlags)

pBITMAPHANDLE pBitmap;	/* pointer to bitmap handle */
L_UINT uLineSpace;	/* spacing between lines */
L_UINT uMaximumHeight;	/* maximum wave height */
L_UINT32 uFlags;	/* flags*/

Adds a pseudo-3D wave effect to the bitmap by drawing lines across the bitmap, basing the lines height at each point on its brightness at that point.

Parameter	Description
pBitmap	Pointer to the bitmap handle that references the bitmap on which to apply the effect.
uLineSpace	The space (in pixels) between each wave.
uMaximumHeight	The maximum height (in pixels) that the wave can reach.
uFlags	Reserved for future use. Must be 0.

Returns

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

Comments

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 adds a pseudo-3D wave effect to the bitmap . It is similar to the Rutt-Etra Video Synthesizer. The Rutt-Etra video synthesizer was a processor that modulated the deflection lines of a television image so that they appeared to adopt the contours of objects. It was invented by Steve Rutt and Bill Etra in the 1970s.

With this function, you set the maximum height to be used for the pixels with the maximum brightness value. The other pixel heights are calculated by linear interpolation. Each line is 1 pixel in width. Control the spacing between the lines that are drawn across the image with the uLineSpace parameter.

You can get a more stable wave by performing either of the following:

Apply any type of blur like L_GaussianFilterBitmap blur with a large nRadius value.

Apply the L_RevEffectBitmap and pass a small value to uMaximumHeight.

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 in the Document and Medical Imaging toolkits.

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

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.

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

Windows 2000 / XP/Vista.

See Also

Functions:	L_EmbossBitmap, L_AddShadowBitmap, L_AllocFTArray, L_ChangeHueSatIntBitmap, L_ColorReplaceBitmap, L_ColorThresholdBitmap, L_DFTBitmap, L_DirectionEdgeStatisticalBitmap, L_FFTBitmap, L_FreeFTArray, L_FrqFilterBitmap, L_FrqFilterMaskBitmap, L_FTDisplayBitmap, L_GetBitmapStatisticsInfo, L_GetFeretsDiameter, L_GetObjectInfo, L_GetRgnContourPoints, L_GetRgnPerimeterLength, L_MathFunctionBitmap, L_SegmentBitmap, L_SubtractBackgroundBitmap, L_UserFilterBitmap, L_BricksTextureBitmap, L_CanvasBitmap, L_CloudsBitmap, L_ColoredBallsBitmap, L_DiffuseGlowBitmap, L_DisplaceMapBitmap, L_FragmentBitmap, L_HalfTonePatternBitmap, L_MaskConvolutionBitmap, L_MosaicTilesBitmap, L_OffsetBitmap, L_PerspectiveBitmap, L_PlasmaFilterBitmap, L_PointillistBitmap, L_RomanMosaicBitmap, L_VignetteBitmap, L_ZigZagBitmap
Topics:	Raster Image Functions: Artistic Effects
	Applying Artistic Effects

Example

#if defined (LEADTOOLS_V16_OR_LATER)
 L_INT RevEffectBitmapExample(L_VOID)
{
   L_INT nRet;
   BITMAPHANDLE LeadBitmap;   /* Bitmap handle for the image */

   /* Load a bitmap at its own bits per pixel  */
   nRet = L_LoadBitmap (TEXT("%UserProfile%\\My Documents\\LEADTOOLS Images\\IMAGE3.CMP"), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL); 
   if(nRet !=SUCCESS)
      return nRet;
   /* Apply Rev effect on the image*/
   nRet = L_RevEffectBitmap (&LeadBitmap, 3, 37, 0);
   if(nRet !=SUCCESS)
      return nRet;
   nRet = L_SaveBitmap(TEXT("%UserProfile%\\My Documents\\LEADTOOLS Images\\Result.BMP"), &LeadBitmap, FILE_BMP, 24, 0, NULL);
   if(nRet !=SUCCESS)
      return nRet;
   //free bitmap 
   if(LeadBitmap.Flags.Allocated)  
      L_FreeBitmap(&LeadBitmap);  
   return SUCCESS;
}
#else
 L_INT RevEffectBitmapExample(L_VOID)
{
   L_INT nRet;
   BITMAPHANDLE LeadBitmap;   /* Bitmap handle for the image */

   /* Load a bitmap at its own bits per pixel  */
   nRet = L_LoadBitmap (TEXT("%UserProfile%\\My Documents\\LEADTOOLS Images\\IMAGE3.CMP"), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL); 
   if(nRet !=SUCCESS)
      return nRet;
   /* Apply Rev effect on the image*/
   nRet = L_RevEffectBitmap (&LeadBitmap, 3, 37);
   if(nRet !=SUCCESS)
      return nRet;
   nRet = L_SaveBitmap(TEXT("%UserProfile%\\My Documents\\LEADTOOLS Images\\Result.BMP"), &LeadBitmap, FILE_BMP, 24, 0, NULL);
   if(nRet !=SUCCESS)
      return nRet;
   //free bitmap 
   if(LeadBitmap.Flags.Allocated)  
      L_FreeBitmap(&LeadBitmap);  
   return SUCCESS;
}
#endif // LEADTOOLS_V16_OR_LATER