L_OffsetBitmap

#include "l_bitmap.h"

L_LTIMGEFX_API L_INT L_OffsetBitmap(pBitmap, nHorizontalShift, nVerticalShift, crBackColor, uFlags)

pBITMAPHANDLE pBitmap;

pointer to bitmap handle

L_INT nHorizontalShift;

horizontal shift

L_INT nVerticalShift;

vertical shift

COLORREF crBackColor;

background color

L_UINT uFlags;

flag

Shifts the bitmap pixels horizontally and vertically.

Parameter Description
pBitmap Pointer to the bitmap handle that references the bitmap on which to apply the effect.
nHorizontalShift Horizontal shift of the bitmap, in pixels.
nVerticalShift Vertical shift of the bitmap, in pixels.
crBackColor The COLORREF value that specifies the fill color for any exposed areas. You can specify a COLORREF value, such as the return value of the Windows RGB macro, or you can use the PALETTEINDEX macro to specify a palette color. This is only useful when uFlags parameter is set to FILL_CLR.
crBackColor Flag that indicates how to handle any exposed areas resulting from the bitmap shift.  Possible values are:
  Value Meaning
  FILL_CLR [0x0000] Fill the exposed areas with crBackColor.
  FILL_RPT [0x0001] Stretch the image edges to fill the exposed area.
  FILL_NOCHG [0x0002] Leave the exposed area as is, without changing it.
  FILL_WRAP [0x0003] Fill any exposed areas with the opposite side of the image.
uFlags Reserved for future use. Must be 0.

Returns

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 shifts the bitmap pixels horizontally and vertically.

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

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

LTIMGEFX

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, Linux.

See Also

Functions:

L_EmbossBitmap, L_AddShadowBitmap, L_AllocFTArray, L_ChangeHueSatIntBitmap, L_ColorReplaceBitmap, L_ColorThresholdBitmap, L_DFTBitmap, L_DirectionEdgeStatisticalBitmap, L_FFTBitmap, L_FreeFTArray, L_FrqFilterBitmap, L_FrqFilterMaskBitmap, L_FTDisplayBitmap, L_GetBitmapStatisticsInfo, L_GetFeretsDiameter, L_GetObjectInfo, L_GetRgnContourPoints, L_GetRgnPerimeterLength, L_MathFunctionBitmap, L_SegmentBitmap, L_SubtractBackgroundBitmap, L_UserFilterBitmap, L_OffsetBitmapRgn.

Topics:

Raster Image Functions: Doing Geometric Transformations

 

Raster Image Functions: Artistic Effects

 

Applying Artistic Effects

Example

L_INT OffsetBitmapExample(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_BGR, NULL, NULL); 
   if(nRet !=SUCCESS) 
      return nRet; 
   /* Apply the Offset Bitmap effect to the image*/ 
   nRet = L_OffsetBitmap(&LeadBitmap, LeadBitmap.Width / 2, LeadBitmap.Height / 2, RGB(0,0,0), FILL_WRAP); 
   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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