Flags for the LBitmapBase::Combine Function

Note: Arithmetic calculations in this table assume 24-bit image data.

The following are the flags that define treatment of the source rectangle:

Value	Meaning
CB_SRC_NOP	[0x00000000] No change.
CB_SRC_NOT	[0x00000001] Invert the color, resulting in its complement.
CB_SRC_0	[0x00000002] Change all bits to 0.
CB_SRC_1	[0x00000003] Change all bits to 1.

The following are the flags that define treatment of the destination rectangle:

Value	Meaning
CB_DST_NOP	[0x00000000] No change.
CB_DST_NOT	[0x00000010] Invert the color, resulting in its complement.
CB_DST_0	[0x00000020] Change all bits to 0.
CB_DST_1	[0x00000030] Change all bits to 1.

The following are the flags that define the operation to use when combining the data:

Value	Meaning
CB_OP_AND	[0x00000000] Combine each set of bytes using a bitwise AND (&).
CB_OP_OR	[0x00000100] Combine each set of bytes using a bitwise OR ( \| ).
CB_OP_XOR	[0x00000200] Combine each set of bytes using a bitwise exclusive OR (^).
CB_OP_ADD	[0x00000300] Add the byte values, allowing a maximum of 255.
CB_OP_SUBSRC	[0x00000400] Subtract the source from the destination, allowing a minimum of 0.
CB_OP_SUBDST	[0x00000500] Subtract the destination from the source, allowing a minimum of 0.
CB_OP_MUL	[0x00000600] Multiply the byte values, allowing a maximum of 255. The result is calculated as follows: result = (source dest) / 255.*
CB_OP_DIVSRC	[0x00000700] Divide the destination by the source. If source > 0, then the result is calculated as follows: result = min( (dest / source) 255, 255 ).* Otherwise, if source = 0, then result = 255.
CB_OP_DIVDST	[0x00000800] Divide the source by the destination. If dest > 0, then the result is calculated as follows: result = min( (source / dest) 255, 255 ).* Otherwise, if dest = 0, then result = 255.
CB_OP_AVG	[0x00000900] Use the average of the two values.
CB_OP_MIN	[0x00000A00] Use the lesser of the two values.
CB_OP_MAX	[0x00000B00] Use the greater of the two values.
CB_OP_ABSDIF	[0x00000C00] Calculate the absolute difference between the two values.
CB_RAWCOMBINE	[0x04000000] Used for row combining.

The following are the flags that define treatment of the resulting image rectangle:

Value	Meaning
CB_RES_NOP	[0x00000000] No change.
CB_RES_NOT	[0x00001000] Invert the color, resulting in its complement.
CB_RES_0	[0x00002000] Change all bits to 0.
CB_RES_1	[0x00003000] Change all bits to 1.

The following are the flags that define the channel of the source image rectangle:

Value	Meaning
CB_SRC_MASTER	[0x00000000] perform operation on all Channels.
CB_SRC_RED	[0x00010000] perform operation on Red Channel.
CB_SRC_GREEN	[0x00020000] perform operation on Green Channel.
CB_SRC_BLUE	[0x00030000] perform operation on Blue Channel.

The following are the flags that define the channel of the destination image rectangle:

Value	Meaning
CB_DST_MASTER	[0x00000000] perform operation on all Channels.
CB_DST_RED	[0x00100000] perform operation on Red Channel.
CB_DST_GREEN	[0x00200000] perform operation on Green Channel.
CB_DST_BLUE	[0x00300000] perform operation on Blue Channel.

The following are the flags that define the channel of the resulting image rectangle:

Value	Meaning
CB_RES_MASTER	[0x00000000] perform operation on all Channels.
CB_RES_RED	[0x01000000] perform operation on Red Channel.
CB_RES_GREEN	[0x02000000] perform operation on Green Channel.
CB_RES_BLUE	[0x03000000] perform operation on Blue Channel.