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CDC::PatBlt

Creates a bit pattern on the device.

BOOL PatBlt(
   int x,
   int y,
   int nWidth,
   int nHeight,
   DWORDdwRop 
);

Parameters

  • x
    Specifies the logical x-coordinate of the upper-left corner of the rectangle that is to receive the pattern.

  • y
    Specifies the logical y-coordinate of the upper-left corner of the rectangle that is to receive the pattern.

  • nWidth
    Specifies the width (in logical units) of the rectangle that is to receive the pattern.

  • nHeight
    Specifies the height (in logical units) of the rectangle that is to receive the pattern.

  • dwRop
    Specifies the raster-operation code. Raster-operation codes (ROPs) define how GDI combines colors in output operations that involve a current brush, a possible source bitmap, and a destination bitmap. This parameter can be one of the following values:

    • PATCOPY   Copies pattern to destination bitmap.

    • PATINVERT   Combines destination bitmap with pattern using the Boolean XOR operator.

    • DSTINVERT   Inverts the destination bitmap.

    • BLACKNESS   Turns all output black.

    • WHITENESS   Turns all output white.

Return Value

Nonzero if the function is successful; otherwise 0.

Remarks

The pattern is a combination of the selected brush and the pattern already on the device. The raster-operation code specified by dwRop defines how the patterns are to be combined. The raster operations listed for this function are a limited subset of the full 256 ternary raster-operation codes; in particular, a raster-operation code that refers to a source cannot be used.

Not all device contexts support the PatBlt function. To determine whether a device context supports PatBlt, call the GetDeviceCaps member function with the RASTERCAPS index and check the return value for the RC_BITBLT flag.

Requirements

Header: afxwin.h

See Also

Reference

CDC Class

Hierarchy Chart

CDC::GetDeviceCaps

PatBlt

Other Resources

CDC Members