The following example creates a region from a path and then gets the data that describes the region.
C++
VOID Example_GetData(HDC)
{
Point points[] = {
Point(110, 20)
Point(120, 30),
Point(100, 60),
Point(120, 70),
Point(150, 60),
Point(140, 10)};
GraphicsPath path;
path.AddClosedCurve(points, 6);
// Create a region from a path.
Region pathRegion(&path);
// Get the region data.
UINT bufferSize = 0;
UINT sizeFilled = 0;
BYTE* pData = NULL;
bufferSize = pathRegion.GetDataSize();
pData = new BYTE[bufferSize];
pathRegion.GetData(pData, bufferSize, &sizeFilled);
// Inspect or use the region data.
...
delete pData;
}
SUB GDIP_GetRegionDataSize (BYVAL hdc AS DWORD)
LOCAL hStatus AS LONG
LOCAL pGraphics AS DWORD
LOCAL pPath AS DWORD
LOCAL pPathRegion AS DWORD
DIM pts(5) AS POINTL
hStatus = GdipCreateFromHDC(hdc, pGraphics)
pts(0).x = 110 : pts(0).y = 20
pts(1).x = 120 : pts(1).y = 30
pts(2).x = 100 : pts(2).y = 60
pts(3).x = 120 : pts(3).y = 70
pts(4).x = 150 : pts(4).y = 60
pts(5).x = 140 : pts(5).y = 10
hStatus = GdipCreatePath(%FillModeAlternate, pPath)
hStatus = GdipAddPathClosedCurveI(pPath, pts(0), 6)
' // Create a region from a path.
hStatus = GdipCreateRegionPath(pPath, pPathRegion)
' // Get the region data.
LOCAL bufferSize AS DWORD
LOCAL sizeFilled AS DWORD
hStatus = GdipGetRegionDataSize(pPathRegion, bufferSize)
' // Cleanup
IF pPathRegion THEN GdipDeleteRegion(pPathRegion)
IF pPath THEN GdipDeletePath(pPath)
IF pGraphics THEN GdipDeleteGraphics(pGraphics)
END SUB