L_RectFromBitmap

#include "l_bitmap.h"

L_LTKRN_API L_INT L_RectFromBitmap(pBitmap, ViewPerspective, lprc)

pBITMAPHANDLE pBitmap;	pointer to the bitmap handle
L_INT ViewPerspective;	destination view perspective
L_RECT* lprc;	pointer to the RECT structure to be translated

Translates a Windows RECT structure from the bitmap's view perspective to the specified view perspective.

Parameter	Description
pBitmap	Pointer to the bitmap handle referencing the bitmap that contains the rectangle.
ViewPerspective	Destination view perspective to which the rectangle should be translated.
lprc	Pointer to the RECT structure to be translated.

Returns

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

Comments

To use this function, do the following:

1.	Declare a Windows RECT structure and a pointer to it.
2.	Assign the values of a known rectangle in the bitmap.
3.	Call this function, passing the pointer to the RECT structure, and specifying the destination view perspective. (The function gets the source view perspective from the bitmap handle.)
4.	Get the translated rectangle from the RECT structure, which this function has updated.

For general information about view perspectives, refer to Accounting for View Perspective.

Required DLLs and Libraries

LTKRN

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.

Example

This example finds out where the RECT {10,10,100,100 } of the bitmap would be in a BOTTOM_LEFT ViewPerspective.

L_INT RectFromBitmapExample(pBITMAPHANDLE LeadBitmap,LPRECT       rc) 
{ 
   L_INT nRet; 
   rc->top    = 10; 
   rc->left   = 10; 
   rc->bottom = 100; 
   rc->right  = 100; 
   nRet = L_RectFromBitmap (LeadBitmap, BOTTOM_LEFT, rc ); 
   if(nRet != SUCCESS) 
      return nRet; 
   return SUCCESS; 
}

Help Version 19.0.2017.10.27

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LEADTOOLS Raster Imaging C API Help

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LEADTOOLS Raster Imaging Features

Redistributables/Files To Be Included With Your Application

Functions:	L_PointFromBitmap, L_PointToBitmap, L_RectToBitmap, L_ChangeBitmapViewPerspective, L_RotateBitmapViewPerspective
Topics:	Accounting for View Perspective