LBitmapBase::GetColors

#include "ltwrappr.h"

virtual L_INT LBitmapBase::GetColors(nIndex, nCount, pPalette)

L_INT nIndex;	/* the index of the first color to be retrieved */
L_INT nCount;	/* the number of colors to retrieve*/
LPRGBQUAD pPalette;	/* pointer to an array of RGBQUAD structures that make up your palette */

Loads your palette with selected colors of a class object's bitmap.

Parameter	Description
nIndex	The index of the first color to be retrieved.
nCount	The number of colors to retrieve.
pPalette	Pointer to an array of RGBQUAD structures that will receive the colors.

Returns

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

Comments

Your palette can be smaller than the bitmap's palette, as long as it is big enough to hold the selected colors. For the reverse action, refer to LBitmapBase::PutColors.

Required DLLs and Libraries

LTDIS
LTFIL

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

See Also

Functions:	Class Members
Topics:	Raster Image Functions: Displaying Images
	Handling Palette Changes
	Color Halftones and Halftone Images
	Raster Image Functions: Working with Color Halftones, Halftones, and Grayscale Images

Example

L_INT LBitmapBase__GetColorsExample()
{
   L_INT nRet;
   LBitmapBase MyBitmap;
   RGBQUAD Colors[256];
   MyBitmap.SetFileName(TEXT("C:\\Program Files\\LEAD Technologies, Inc\\LEADTOOLS 15.0\\Images\\image1.cmp"));
   nRet =MyBitmap.Load(8);//load at 8 bit per pixel
   if(nRet !=SUCCESS)
      return nRet;
   nRet =MyBitmap.GetColors(0, 255, Colors) ;
   if(nRet !=SUCCESS)
      return nRet;
   return SUCCESS;
}