L_ImgKrnCropImage

#include "ltimgkrn.h"

L_LTIMGKRN_API L_INT L_ImgKrnCropImage(bitmap, rect)

Crops the bitmap, resulting in a bitmap having the size of the specified rectangle.

Parameters

BITMAPHANDLE *bitmap

Pointer to the bitmap handle referencing the bitmap to be cropped.

const L_RECT *rect

The rectangular area to which the bitmap will be cropped.

Returns

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

Comments

This function uses bitmap coordinates to specify the area to be cropped. Therefore, you must account for the view perspective of the bitmap.

Note: All functions with the L_ImgKrn prefix modify the underlying properties of the input BITMAPHANDLE, including but not limited to:

To avoid BITMAPHANDLE property fidelity loss, pass a copy of your BITMAPHANDLE to all L_ImgKrn* functions.

Required DLLs and Libraries

Platforms

Win32, x64, Linux.

See Also

Functions

Topics

Example

This example loads an image and crops it.

L_INT KrnCropImageExample(L_VOID) 
{ 
   L_INT ret; 
   BITMAPHANDLE bitmap;   /* Bitmap handle to hold the loaded image. */ 
   L_RECT cropBounds;     /* Area to keep. */ 
 
   /* Load the bitmap */ 
   ret = L_LoadBitmap(MAKE_IMAGE_PATH(TEXT("cannon.jpg")), &bitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL); 
   if (ret != SUCCESS) 
      return ret; 
 
   /* Crop half the image */ 
   cropBounds.left = 0; 
   cropBounds.top = 0; 
   cropBounds.right = bitmap.Width / 2; 
   cropBounds.bottom = bitmap.Height; 
 
   ret = L_ImgKrnCropImage(&bitmap, &cropBounds); 
   if (ret == SUCCESS) 
      ret = L_SaveBitmap(MAKE_IMAGE_PATH(TEXT("Result.BMP")), &bitmap, FILE_BMP, 24, 0, NULL); 
 
   L_FreeBitmap(&bitmap); 
 
   return ret; 
} 

Help Version 21.0.2021.4.7
Products | Support | Contact Us | Intellectual Property Notices
© 1991-2021 LEAD Technologies, Inc. All Rights Reserved.

LEADTOOLS Raster Imaging C API Help