LBitmapBase::PointFromBitmap (original) (raw)
Summary
Translates a point (x,y) from the class object's bitmap view perspective to the specified view perspective.
Syntax
#include "ltwrappr.h"
virtual L_INT LBitmapBase::PointFromBitmap(nViewPerspective, px, py)
Parameters
L_INT nViewPerspective
Destination view perspective to which the point should be translated.
L_INT * px
Address of variable for the X coordinate of the point.
L_INT * py
Address of variable for the Y coordinate of the point.
Returns
| Value | Meaning |
|---|---|
| SUCCESS | The function was successful. |
| < 1 | An error occurred. Refer to Return Codes. |
Comments
To use this function, do the following:
- Declare variables for the X and Y coordinates of a point.
- Assign the values of a known point in the bitmap.
- Call this function, passing the addresses of the variables, and specifying the destination view perspective. (The function gets the source view perspective from the bitmap handle.)
- 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
- LTDIS
- LTFIL
- 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.
See Also
Functions
Topics
Example
L_INT LBitmapBase__PointFromBitmapExample()
{
L_INT nRet;
LBitmapBase MyBitmap;
L_INT npx=20, npy=30;
nRet =MyBitmap.Load(MAKE_IMAGE_PATH(TEXT("image1.cmp")),24);
if(nRet !=SUCCESS)
return nRet;
nRet =MyBitmap.PointFromBitmap(BOTTOM_LEFT, &npx, &npy);
if(nRet !=SUCCESS)
return nRet;
return SUCCESS;
}
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