L_FragmentBitmap

#include "l_bitmap.h"

L_LTIMGSFX_API L_INT L_FragmentBitmap(pBitmap, uOffset, uOpacity, uFlags)

Averages a bitmap with its shifted copies.

Parameters

pBITMAPHANDLE pBitmap

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

L_UINT uOffset

Value that indicates the number of pixels the copied image is shifted.

L_UINT uOpacity

Value that indicates the transparency, in percent, of the copy in comparison to the original image. Possible values range from 0 to 100. A value of 0 means the resulting image will be black. A value of 100 means that each copy's value will comprise 25% of the result.

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 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.

This function creates four copies of an image. Each copy is shifted by the offset amount into one of the four directions: top, left, bottom and right. Then the bitmap is averaged with its shifted copies.

Use the L_DisplaceMapBitmap function to displace a bitmap's pixels horizontally and vertically according to the values of the displacement map image.

Use the L_OffsetBitmap function to shift a bitmap's pixels horizontally and vertically.

Use the L_OffsetBitmapRgn function to move a bitmap region by the specified number of rows and columns.

This function can process the whole image or a region of the image. If a bitmap has a region, the effect is applied only to the region.

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

Platforms

Win32, x64.

See Also

Functions

Topics

Example

Apply the fragment effect with four pixel shifting and opacity = 100

L_INT FragmentBitmapExample(L_VOID) 
{ 
   L_INT nRet; 
   BITMAPHANDLE LeadBitmap; /* Bitmap handle for the image */ 
   /* Load a bitmap at its own bits per pixel */ 
   nRet = L_LoadBitmap (MAKE_IMAGE_PATH(TEXT("ImageProcessingDemo\\NaturalFruits.jpg")), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGRORGRAY, NULL, NULL);    
   if(nRet !=SUCCESS) 
      return nRet; 
   /* Apply the effect*/ 
   nRet = L_FragmentBitmap(&LeadBitmap, 4, 100, 0); 
   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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