TcxCanvas.CopyMode Property

Specifies the active bitmap draw mode.

Declaration

property CopyMode: TCopyMode read; write;

Property Value

Type
TCopyMode

Remarks

Use this property to determine how all bitmap draw routines work. The Windows unit defines the following constants that you can assign to the CopyMode property to achieve different effects:

Value	Description	Source	Destination	Result
cmBlackness	Fills the destination rectangle with the first color on the default palette (solid black). This operation ignores the content of both source and destination rectangles.
cmDstInvert	Inverts the colors within the destination rectangle and ignores the source.
cmMergeCopy	Uses the Boolean AND operator to merge the corresponding pixel colors of the source and destination rectangles.
cmMergePaint	Uses the Boolean OR operator to merge the corresponding pixel colors of the source and destination rectangles.
cmNotSrcCopy	Copies the inverted source rectangle into the destination rectangle whose content is ignored.
cmNotSrcErase	Uses the Boolean OR operator to merge the corresponding pixel colors of the source and destination rectangles and then inverts the resulting pixel colors.
cmPatCopy	Copies the source rectangle’s pattern into the destination rectangle whose content is ignored.
cmPatInvert	Uses the Boolean XOR operator to merge the source rectangle’s pattern and the destination rectangle’s content.
cmPatPaint	The Boolean OR operator combines the inverted source bitmap and the source bitmap’s pattern. Then, another Boolean OR operator combines the resulting pixels and the destination rectangle’s content.
cmSrcAnd	Uses the Boolean AND operator to combine the source and destination rectangles.
cmSrcCopy	Replaces the destination rectangle’s content with the source rectangle. This is the default bitmap draw mode.
cmSrcErase	Inverts content of the destination rectangle and applies the Boolean AND operator to the resulting pixels and the source rectangle.
cmSrcInvert	Uses the Boolean XOR operator to merge the corresponding pixels of the destination and source rectangles.
cmSrcPaint	Uses the Boolean OR operator to merge the corresponding pixels of the destination and source rectangles.
cmWhiteness	Fills the destination rectangle with the second color on the default palette (solid white). This operation ignores content of both source and destination rectangles.