L_PointToBitmap

#include "l_bitmap.h"

L_LTKRN_API L_INT L_PointToBitmap(pBitmap, ViewPerspective, px, py)

pBITMAPHANDLE pBitmap;

pointer to the bitmap handle

L_INT ViewPerspective;

source view perspective

L_INT* px;

address of the x coordinate variable

L_INT* py;

address of the y coordinate variable

Translates a point (x,y) from the specified view perspective to the bitmap's view perspective.

Parameter

Description

pBitmap

Pointer to the bitmap handle referencing the target bitmap.

ViewPerspective

Source view perspective from which the point should be translated.

px

Address of variable for the X coordinate of the point.

py

Address of variable for the Y coordinate of the point.

Returns

SUCCESS

The function was successful.

< 1

An error occurred. Refer to Return Codes.

Comments

To use this function, do the following:

1.

Declare variables for the X and Y coordinates of a point.

2.

Assign the values of a known point using the coordinates of the source view perspective.

3.

Call this function, passing the addresses of the variables, and specifying the source view perspective. (The function gets the destination view perspective from the bitmap handle.)

4.

Get the translated point from the variables, 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.

See Also

Functions:

L_PointFromBitmap, L_RectFromBitmap, L_RectToBitmap, L_ChangeBitmapViewPerspective, L_RotateBitmapViewPerspective

Topics:

Accounting for View Perspective

Example

This example finds out where a point in the TOP_LEFT90 ViewPerspective actually is in the bitmap

L_INT PointToBitmapExample(pBITMAPHANDLE  LeadBitmap,L_INT* nX,L_INT* nY) 
{ 
   L_INT nRet; 
   nRet = L_PointToBitmap ( LeadBitmap, TOP_LEFT90, nX, nY); 
   if(nRet != SUCCESS) 
      return nRet; 
   return SUCCESS; 
} 

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