Resizes the class object's bitmap to a new width and height.


#include "ltwrappr.h"

virtual L_INT LBitmapBase::Size(nWidth, nHeight, uFlags=SIZE_NORMAL)


L_INT nWidth

New width of the bitmap in pixels.

L_INT nHeight

New height of the bitmap in pixels.

L_UINT32 uFlags

Flag that indicates how to resize the bitmap. Possible values are:

Value Meaning
SIZE_NORMAL [0x0000] Resize normally.
SIZE_FAVORBLACK [0x0001] (Document/Medical only) Preserve black objects when making the image smaller. This option affects only 1-bit, black-and-white images, where it prevents the disappearance of thin lines. You can use a bitwise OR ( ) to combine this flag with another one. For example, SIZE_RESAMPLE | SIZE_FAVORBLACK causes color images to be resampled, but applies the favor-black option to 1-bit, black-and-white images.
SIZE_RESAMPLE [0x0002] Use interpolation and averaging to produce a higher quality image.
SIZE_BICUBIC [0x0004] Use bicubic interpolation and averaging to produce a higher quality image. This is slower than SIZE_RESAMPLE.
SIZE_SCALETOGRAY [0x0008] (Document/Medical only). Use interpolation to display black and white images using shades of gray when the image is resized. This improves the readability when the image is scaled up or down. The generated image is 8-bit grayscale, so this option should be used only for black and white images.
SIZE_OLD_RESAMPLE [0x0010] Use the old resample algorithm from LEADTOOLS 14.5.
SIZE_PREMULTIPLYALPHA [0x0020] Premultiply the alpha channel values when performing resize.


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


Call this function to change the size of the class object's bitmap.

This function keeps the same bitmap handle and resizes the bitmap that it references. If you want to keep the original-size bitmap along with the resized bitmap, use the LBitmapBase::Resize function.

To update a status bar or detect a user interrupt during execution of this function, refer to LBase::EnableStatusCallBack.

Required DLLs and Libraries


Win32, x64.

See Also




L_INT LBitmapBase__SizeExample() 
   L_INT nRet; 
   LBitmapBase MyBitmap; 
   nRet =MyBitmap.Load(MAKE_IMAGE_PATH(TEXT("image1.cmp"))); 
   if(nRet !=SUCCESS) 
      return nRet; 
   nRet =MyBitmap.Size(100,100); 
   if(nRet !=SUCCESS) 
      return nRet;/*change the size of the bitmap object to 100x100  */ 
   nRet =MyBitmap.Free(); 
   if(nRet !=SUCCESS) 
      return nRet; 
   return SUCCESS; 
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LEADTOOLS Raster Imaging C++ Class Library Help