L_ImgKrnRotateFlipImage

#include "ltimgkrn.h"

L_LTIMGKRN_API L_INT L_ImgKrnRotateFlipImage(bitmap, type)

Rotates and flips the bitmap.

Parameters

BITMAPHANDLE *bitmap

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

L_ImgKrnRotateFlipType type

The type of rotation and flip to apply.

Returns

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

Comments

This function rotates the image clockwise.

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

The following example loads a bitmap and flips it vertically.

L_INT KrnRotateFlipImageExample(L_VOID) 
{ 
   L_INT ret; 
   BITMAPHANDLE bitmap;       /* Bitmap handle to hold the loaded image. */ 
 
   /* 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; 
 
   /* Rotate the image vertically */ 
   ret = L_ImgKrnRotateFlipImage(&bitmap, L_ImgKrnRotateFlipType_RotateNoneFlipY); 
 
   // Check if document detected 
   if (ret == SUCCESS) 
      ret = L_SaveBitmap(MAKE_IMAGE_PATH(TEXT("Result.BMP")), &bitmap, FILE_BMP, 24, 0, NULL); 
 
   L_FreeBitmap(&bitmap); 
 
   return ret; 
} 

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