TWidgetSet.SetROP2 function

Declaration

function SetROP2(DC: HDC; Mode: Integer): Integer; virtual

Arguments

Function result

The old mode, zero on failure.

Description

The raster operation specifies how foreground painting (Brush, Pen) is combined with the current pixels in the DC. The operation combines bitwise the distinct red, green and blue values in pixel colors.

There are 16 raster operations using the possible combinations of two (boolean) values:

R2_BLACK

All black (0).

R2_COPYPEN

Pen color.

R2_MASKNOTPEN

Dst and not Pen.

R2_MASKPEN

Dst and Pen.

R2_MASKPENNOT

(Not Dst) and Pen.

R2_MERGENOTPEN

Dst or not Pen.

R2_MERGEPEN

Dst or Pen.

R2_MERGEPENNOT

(Not Dst) or Pen.

R2_NOP

Dst (unchanged).

R2_NOT

Not Dst.

R2_NOTCOPYPEN

Not Pen.

R2_NOTMASKPEN

Not (Dst and Pen).

R2_NOTMERGEPEN

Not (Dst or Pen).

R2_NOTXORPEN

Not (Dst xor Pen).

R2_WHITE

All white.

R2_XORPEN

Dst xor Pen.

See also

• GetROP2
• R2_COPYPEN