以下是 D3D11_LOGIC_OP 枚举的定义：
typedef enum D3D11_LOGIC_OP {
D3D11_LOGIC_OP_CLEAR = 0,
D3D11_LOGIC_OP_SET = (D3D11_LOGIC_OP_CLEAR + 1),
D3D11_LOGIC_OP_COPY = (D3D11_LOGIC_OP_SET + 1),
D3D11_LOGIC_OP_COPY_INVERTED = (D3D11_LOGIC_OP_COPY + 1),
D3D11_LOGIC_OP_NOOP = (D3D11_LOGIC_OP_COPY_INVERTED + 1),
D3D11_LOGIC_OP_INVERT = (D3D11_LOGIC_OP_NOOP + 1),
D3D11_LOGIC_OP_AND = (D3D11_LOGIC_OP_INVERT + 1),
D3D11_LOGIC_OP_NAND = (D3D11_LOGIC_OP_AND + 1),
D3D11_LOGIC_OP_OR = (D3D11_LOGIC_OP_NAND + 1),
D3D11_LOGIC_OP_NOR = (D3D11_LOGIC_OP_OR + 1),
D3D11_LOGIC_OP_XOR = (D3D11_LOGIC_OP_NOR + 1),
D3D11_LOGIC_OP_EQUIV = (D3D11_LOGIC_OP_XOR + 1),
D3D11_LOGIC_OP_AND_REVERSE = (D3D11_LOGIC_OP_EQUIV + 1),
D3D11_LOGIC_OP_AND_INVERTED = (D3D11_LOGIC_OP_AND_REVERSE + 1),
D3D11_LOGIC_OP_OR_REVERSE = (D3D11_LOGIC_OP_AND_INVERTED + 1),
D3D11_LOGIC_OP_OR_INVERTED = (D3D11_LOGIC_OP_OR_REVERSE + 1)
} D3D11_LOGIC_OP;
这个枚举定义了各种逻辑运算操作，包括清除、设置、复制、反转等。这些逻辑运算操作可以在渲染管线的不同阶段进行，例如在像素着色器执行之前或之后。逻辑运算可以用于实现一些特定的图形效果或优化。例如，可以使用逻辑运算来实现选择性的颜色写入或深度测试。
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