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L_FragmentBitmap

Summary

Averages a bitmap with its shifted copies.

Syntax

#include "l_bitmap.h"

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

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.

Fragment Function - Before

Fragment Function - After

View additional platform support for this Fragment function.

Required DLLs and Libraries

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

Platforms

Win32, x64.

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("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; 
}