Available in LEADTOOLS Imaging Pro, Vector, Document, and Medical Imaging toolkits. |
#include "ltwrappr.h"
virtual HRGN LBitmapRgn::GetRgnHandle()
Creates a Windows region that is a snapshot of the associated class object's bitmap region.
Returns
The Windows region handle used by the class object's bitmap region.
Comments
If you want to assign a region from one bitmap to another, you must use the LBitmapRgn::GetRgnHandle function to get region from the first bitmap; then use the LBitmapRgn::SetRgnHandle function to assign the region to the second bitmap.
You are responsible for deleting the Windows region to free memory when the region is no longer needed. To do so, use the Windows DeleteObject function. The following is a list of Windows functions that relate to Windows regions:
Function |
Action |
CombineRgn |
creates a region by combining two regions. |
CreateEllipticRgn |
creates an elliptical region. |
CreateEllipticRgnIndirect |
creates and elliptical region. |
CreatePolygonRgn |
creates a polygonal region. |
CreatePolyPolygonRgn |
creates a region consisting of polygons. |
CreateRectRgn |
creates a rectangular region. |
CreateRectRgnIndirect |
creates a rectangular region using a RECT structure. |
CreateRoundRectRgn |
creates a rectangular region with round corners. |
DeleteObject |
deletes a Windows GDI object, such as a region. |
EqualRgn |
compares two regions for equality. |
FillRgn |
fills a region with the specified brush. |
FrameRgn |
draws a border around a region. |
GetRgnBox |
retrieves the bounding rectangle for a region. |
InvertRgn |
inverts the colors in a region. |
OffsetRgn |
moves a region by the specified offsets. |
PaintRgn |
fills a region with the brush in the device context. |
PtInRegion |
queries whether a point is in a region. |
RectInRegion |
queries whether a rectangle overlaps a region. |
SetRectRgn |
changes a region into a specified rectangle. |
Required DLLs and Libraries
LTDIS 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: |
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Topics: |
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Example
For an example, refer to LBitmapRgn::SetRgnPolygon.