my_setdrawmode()

define the drawing mode for subsequent draw operations

Synopsis:

void my_setdrawmode( int mode );

Description:

This function sets the drawing mode for subsequent draw operations. In the table below, "source" refers to what has already been rendered, and "destination" to what is about to be rendered.

mode	Meaning	Result
0	OPAQUE	destination
1	XOR	destination ^ source
2	AND	source & destination
3	OR	source \| destination
4	COPYINV	~destination
5	XNOR	source ^ (~destination)
6	ANDINV	source & (~destination)
7	ORINV	source \| (~destination)
8	CLEAR	Nothing
9	NO-OP	Null operation
10	ANDREV	(~source) & destination
11	ORREV	(~source) \| destination
12	SET	`0xFF` (maximum value)
13	INVERT	~source
14	NOR	(~source) & (~destination)
15	NAND	(~source) \| (~destination)

By default, this function sets the drawmode member of the _doc_ctrl structure. This member is used by _Rect() to determine how to draw.

Classification:

Photon

Safety:
Interrupt handler	Not applicable
Signal handler	Not applicable
Thread	Not applicable