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Gets the number of unique colors in an image.
#include "l_bitmap.h"
L_LTIMGCLR_API L_INT L_GetBitmapColorCount(pBitmap, puCount, uFlags)
Pointer to the bitmap handle referencing the bitmap.
Address of the variable to be updated with the number of unique colors.
Reserved for future use. Must be 0.
| Value | Meaning |
|---|---|
| SUCCESS | The function was successful. |
| < 1 | An error occurred. Refer to Return Codes. |
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.
Win32, x64, Linux.
This example displays the number of unique colors in the specified bitmap.
L_INT GetBitmapColorCountExample(L_VOID){L_INT nRet;L_TCHAR szMessage[80]; /* Buffer for the MessageBox string */L_UINT32 dwColors; /* Number of colors in the bitmap */BITMAPHANDLE LeadBitmap;/* Load the bitmap, keeping the bits per pixel of the file */nRet = L_LoadBitmap(MAKE_IMAGE_PATH(TEXT("Master.jpg")), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL);if (nRet != SUCCESS)return nRet;/* Get the number of colors in the bitmap */nRet = L_GetBitmapColorCount(&LeadBitmap, &dwColors, 0);if (nRet != SUCCESS)return nRet;/* Display the result in a message */wsprintf(szMessage, TEXT("NOTE: The bitmap has %ld colors\n"), dwColors);_tprintf(_T("%s"), szMessage);return SUCCESS;}
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