The GetBrushOrgEx function retrieves the current brush origin for the specified device context. This function replaces the GetBrushOrg function.
BOOL GetBrushOrgEx(
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HDC hdc, |
// handle of device context |
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LPPOINT lppt |
// address of structure of coordinates |
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); |
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error information, call GetLastError.
A brush is a bitmap that Windows uses to paint the interiors of filled shapes.
The brush origin is a set of coordinates with values between 0 and 7, specifying the location of one pixel in the bitmap. The default brush origin coordinates are (0,0). For horizontal coordinates, the value 0 corresponds to the leftmost column of pixels; the value 7 corresponds to the rightmost column. For vertical coordinates, the value 0 corresponds to the uppermost row of pixels; value 7 corresponds to the lowermost row. When Windows positions the brush at the start of any painting operation, it maps the origin of the brush to the location in the window’s client area specified by the brush origin. For example, if the origin is set to (2,3), Windows maps the origin of the brush (0,0) to the location (2,3) on the window’s client area.
If an application uses a brush to fill the backgrounds of both a parent and a child window with matching colors, it may be necessary to set the brush origin after painting the parent window but before painting the child window.
Windows NT: The operating system automatically tracks the origin of all window-managed device contexts and adjusts their brushes as necessary to maintain an alignment of patterns on the surface.
Windows 95: Automatic tracking of the brush origin is not supported. Applications must use the UnrealizeObject, SetBrushOrgEx, and SelectObject functions to align the brush before using it.