Drawing modes are binary raster-operation codes representing all possible Boolean combinations of two variables, using the binary operators AND, OR, and XOR (exclusive OR), and the unary operation NOT.

• 绘图模式是二进制的光栅操作代码，使用二元操作符AND,OR和XOR，以及一元操作符NOT，表达了两个变量所有可能的布尔组合。