#include "ltwrappr.h"

virtual L_INT LBitmap::SwapColors(nFlags = 0)

L_INT nFlags;


Swaps the specified color channels.

Parameter Description
nFlags Flag that indicates which color channels to swap. Possible values are:
  Value Meaning
  SWAP_RG Swap the red and green channels. (Change red to green and green to red.)
  SWAP_RB Swap the red and blue channels. (Change red to blue and blue to red.)
  SWAP_GB Swap the green and blue channels. (Change green to blue and blue to green.)
  SWAP_RGBR Change red to green, green to blue and blue to red.
  SWAP_RBGR Change red to blue, blue to green and green to red.



The function was successful.

< 1

An error occurred. Refer to Return Codes.


This function changes the data of the class object's bitmap.

This function can process the whole image or a region of the image.

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 supports signed data images.

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


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


Win32, x64.

See Also


LBitmap::AdjustTint. LBitmap::ColorHalfTone, LBitmap::ConvertToColoredGray, LBitmap::BalanceColors, LBitmapBase::GrayScale, LBitmap::GrayScaleExt, LBitmapBase::IsGrayScale, Class Members


Correcting Colors


Raster Image Functions: Modifying Intensity Values


Raster Image Functions: Correcting Colors


L_INT LBitmap__SwapColorsExample(LBitmap & Bitmap, L_TCHAR * szFileName) 
   L_INT nRet; 
   nRet =Bitmap.Load(szFileName); 
   if(nRet !=SUCCESS) 
      return nRet; 
   return Bitmap.SwapColors(SWAP_RB); 

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