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L_RadWaveBitmap

#include "l_bitmap.h"

L_LTIMGSFX_API L_INT L_RadWaveBitmap(pBitmap, uAmplitude, uWaveLen, nPhase, pCenter, crFill, uFlags)

Distorts a bitmap using a wave radiating from the specified center.

Parameters

pBITMAPHANDLE pBitmap

Pointer to the bitmap handle that references the bitmap on which to apply the effect.

L_UINT uAmplitude

An integer that represents the magnitude of the wave. Valid values range from 0 to 100.

L_UINT uWaveLen

Value that represents the wave length, if DIS_PER is set in the uFlags parameter. Possible values range from 1 to 100 and give the wavelength as a percentage of the bitmap dimensions. If DIS_FRQ is set in uFlags, this value is the number of repeated waves.

L_INT nPhase

Wave phase shift, in hundredths of degrees. The valid range is from -36000 to 36000 (The value in degrees is nPhase divided by 100).

POINT pCenter

POINT structure that contains the point from which the wave radiates.

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 exposed areas and what type of information is in the uWaveLen parameter. You can use a bitwise OR (|) to specify one flag from each group.

The following are the flags that indicate how to handle 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 the type of information contained in the uWaveLength parameter:

Value	Meaning
DIS_PER	[0x0000] The value in uWaveLen is a wavelength given as a percent of the bitmap dimensions. If this value is set, the valid range of uWaveLen is from 0 to 100.
DIS_FRQ	[0x0010] The value in uWaveLen is the frequency, or the number of times the wave repeats.

Returns

Value	Meaning
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.

The function applies a sinusoidal wave radiating from the specified center. 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 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

Win32, x64.

Functions

Topics

Example

L_INT RadWaveBitmapExample(L_VOID) 
{ 
   L_INT nRet; 
   BITMAPHANDLE LeadBitmap;   /* Bitmap handle for the image */ 
   POINT CenterPt; 
 
   /* Load a bitmap at its own bits per pixel  */ 
   nRet = L_LoadBitmap(MAKE_IMAGE_PATH(TEXT("sample5.cmp")), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL); 
   if(nRet !=SUCCESS) 
      return nRet; 
 
   /* apply zoom wave from center of the image*/ 
   CenterPt.x  =  LeadBitmap.Width/2; 
   CenterPt.y  =  LeadBitmap. Height/2; 
   nRet = L_RadWaveBitmap (&LeadBitmap, 5, 25, 0, CenterPt, 0, FILL_RPT | DIS_FRQ); 
   if(nRet !=SUCCESS) 
      return nRet; 
   nRet = L_SaveBitmap(MAKE_IMAGE_PATH(TEXT("Result.BMP")), &LeadBitmap, FILE_BMP, 24, 0, NULL); 
   if(nRet !=SUCCESS) 
      return nRet; 
   //free bitmap  
   if(LeadBitmap.Flags.Allocated)   
      L_FreeBitmap(&LeadBitmap);   
   return SUCCESS; 
}

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