L_GetBitmapColorCount

#include "l_bitmap.h"

L_LTIMGCLR_API L_INT L_GetBitmapColorCount(pBitmap, puCount, uFlags)

Gets the number of unique colors in an image.

Parameters

pBITMAPHANDLE pBitmap

Pointer to the bitmap handle referencing the bitmap.

L_UINT * puCount

Address of the variable to be updated with the number of unique colors.

L_UINT32 uFlags

Reserved for future use. Must be 0.

Returns

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

Comments

This function supports 12 and 16-bit grayscale images. Support for 12 and 16-bit grayscale images is available in the Document and Medical Imaging toolkits.

This function supports 32-bit grayscale images.

Required DLLs and Libraries

Platforms

Win32, x64, Linux.

See Also

Functions

Topics

Example

This example displays the number of unique colors in the specified bitmap. 

L_INT  GetBitmapColorCountExample(pBITMAPHANDLE pBitmap) 
{ 
   L_INT nRet; 
   L_TCHAR szMessage[80]; /* Buffer for the MessageBox string */ 
   L_UINT32 dwColors; /* Number of colors in the bitmap */ 
   /* Get the number of colors in the bitmap */ 
   nRet = L_GetBitmapColorCount(pBitmap, &dwColors, 0); 
   if(nRet !=SUCCESS) 
      return nRet; 
   /* Display the result in a message */ 
   wsprintf( szMessage, TEXT("The bitmap has %ld colors"), dwColors ); 
   MessageBox (NULL, szMessage, MAKE_IMAGE_PATH(TEXT("Notice")), MB_OK); 
   return SUCCESS; 
}

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