LBitmapBase::GetRotateParams

#include "ltwrappr.h"

L_VOID LBitmapBase::GetRotateParams(nAngle, bResize, pOldCenter)

L_INT32 * nAngle;	hundredths of degreesto rotate (+/-)
L_BOOL * bResize;	resize flag
pANNPOINT pOldCenter;	rotation center point

Gets the parameters that were used for the last LBitmapBase::Rotate or LBitmapBase::RotateViewPerspective call.

Parameter	Description
nAngle	Hundredths of degrees to rotate (+/-). This can be a number from 0 to 36,000. A positive value will rotate the image in a clockwise rotation, while a negative value will rotate the image in a counter-clockwise rotation.
bResize	TRUE if the image was also resized, FALSE if the dimensions were not altered.
pOldCenter	The center point that was used for the rotation. Normally, this is the images center point.

Returns

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

Comments

Bitmaps might be rotated by user interaction within the LAnnotationWindow class. This function can be used to get the parameters that were specified when that rotation occurred.

Required DLLs and Libraries

LTKRN

LTWVC

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

#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName 
class MyBitmapBase : public LBitmapBase { 
public: 
   L_VOID MyGetRotateParams( L_INT32 * nAngle, L_BOOL *bResize, pANNPOINT pOldCenter) 
   { 
      this->GetRotateParams(nAngle,bResize,pOldCenter); 
   } 
}; 
L_INT LBitmapBase__GetRotateParamsExample() 
{ 
   L_INT nRet; 
   MyBitmapBase LeadBitmap;   /* Bitmap handle to hold the loaded image. */ 
   pBITMAPHANDLE pLeadBitmapHandle = LeadBitmap.GetHandle(); 
   /* Load the bitmap, keeping the bits per pixel of the file */ 
   nRet = LeadBitmap.Load(MAKE_IMAGE_PATH(TEXT("IMAGE1.CMP")), 0, ORDER_BGR); 
   if(nRet !=SUCCESS) 
      return nRet; 
   L_INT32  nAngle;        /* hundredths of degreesto rotate (+/-) */ 
   L_BOOL  bResize;        /* resize flag */ 
   ANNPOINT OldCenter;     /* rotation center point */ 
   LeadBitmap.MyGetRotateParams(&nAngle, &bResize, &OldCenter); 
   //free bitmap 
   if(pLeadBitmapHandle->Flags.Allocated) 
      L_FreeBitmap(pLeadBitmapHandle); 
   return SUCCESS; 
}

Help Version 19.0.2017.10.27

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LEADTOOLS Raster Imaging C++ Class Library Help

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Summary of Features

Functions:	LBitmapBase::Rotate, LBitmapBase::RotateViewPerspective, Class Members
Topics:	Raster Image Functions: Doing Geometric Transformations
	LAnnotationWindow