2.2.7.45 MILCMD_WINDOWNODE_SETCOMPOSEONCE
The MILCMD_WINDOWNODE_SETCOMPOSEONCE packet specifies whether a window node MUST be marked as a composed-once visual. A visual marked for composed-once accumulates rendering instructions like a normal visual, but the instructions are executed only once at the next available composition pass, and then they are discarded. This construct is useful for emulating direct writes to the screen in a composed desktop environment.
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messageSize |
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targetResource |
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fComposeOnce |
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messageSize (4 bytes): A 32-bit unsigned integer. The size of this message in bytes. The value of this field MUST be set to 0x00000010.
controlCode (4 bytes): A 32-bit unsigned integer containing the control code for this message. The value of this field MUST be equal to 0x00000039.
targetResource (4 bytes): A 32-bit unsigned integer. The value of this field MUST be set to a valid resource handle referencing a resource of type TYPE_WINDOWNODE. This handle identifies the resource that is the target for this message.
fComposeOnce (4 bytes): A 32-bit integer Boolean value. If this value is nonzero, the contents of the sprite image associated with this window node MUST be rendered only once. If this value is zero, the sprite image associated with this window node MUST be rendered using default rendering rules as described in section 3.1.