Gdi::SetROP2_I

This method sets the current foreground mix mode. GDI uses the foreground mix mode to combine pens and interiors of filled objects with the colors already on the screen. The foreground mix mode defines how colors from the brush or pen are combined with the colors in the existing image.

static WINGDIAPI int WINAPI SetROP2_I(
  HDC hdc, 
  int fnDrawMode
);

Parameters

• hdc
  [in] Handle to the device context.
• fnDrawMode
  [in] Integer that specifies the new mix mode. The following table shows the possible values.

  Value	Description
  R2_BLACK	Pixel is always 0.
  R2_COPYPEN	Pixel is the pen color.
  R2_MASKNOTPEN	Pixel is a combination of the colors common to both the screen and the inverse of the pen.
  R2_MASKPEN	Pixel is a combination of the colors common to both the pen and the screen.
  R2_MASKPENNOT	Pixel is a combination of the colors common to both the pen and the inverse of the screen.
  R2_MERGENOTPEN	Pixel is a combination of the screen color and the inverse of the pen color.
  R2_MERGEPEN	Pixel is a combination of the pen color and the screen color.
  R2_MERGEPENNOT	Pixel is a combination of the pen color and the inverse of the screen color.
  R2_NOP	Pixel remains unchanged.
  R2_NOT	Pixel is the inverse of the screen color.
  R2_NOTCOPYPEN	Pixel is the inverse of the pen color.
  R2_NOTMASKPEN	Pixel is the inverse of the R2_MASKPEN color.
  R2_NOTMERGEPEN	Pixel is the inverse of the R2_MERGEPEN color.
  R2_NOTXORPEN	Pixel is the inverse of the R2_XORPEN color.
  R2_WHITE	Pixel is always 1.
  R2_XORPEN	Pixel is a combination of the colors in the pen and in the screen, but not in both.

Return Values

If the function succeeds, the return value is the previous mix mode. If the function fails, the return value is zero. To get extended error information, call GetLastError.

Remarks

This function is an internal version of the SetROP2 function.

Mix modes define how GDI combines source and destination colors when drawing with the current pen. The mix modes are binary raster operation codes, representing all possible Boolean functions of two variables, using the binary operations AND, OR, and XOR (exclusive OR), and the unary operation NOT. The mix mode is for raster devices only; it is not available for vector devices.

Requirements

OS Versions: Windows CE .NET 4.0 and later.
Header: Gdi.hpp.

See Also

SetROP2 | Gdi::CreatePatternBrush_I

Last updated on Wednesday, April 13, 2005

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