Shader命令——Blend 混合

Blend透明渲染这块有点头疼。知道参数，还不是很明白计算公式。后续学会的话，来更新文章

SrcColor 要渲染得颜色

SrcAplha 要渲染的透明度

DstColor 已经再屏幕上显示的颜色

DstAlpha 已经再屏幕上显示得颜色透明度

One MinusSrcColor 1减去要渲染的颜色

OneMinusSrcAlpha 1减去要渲染的透明度

One MinusDstColor 1减去屏幕上显示的颜色

OneMinusDstAlpha 1减去屏幕上显示的颜色的透明度

解释：

Blend SrcAlpha OneMinusSrcAlpha

要渲染的颜色 * 要渲染的颜色透明度 + （1-要渲染的颜色透明度）*Gubffer的像素

常用命令

Blend SrcAlpha OneMinusSrcAlpha // Traditional transparency

Blend One OneMinusSrcAlpha // Premultiplied transparency

Blend One One // Additive

Blend OneMinusDstColor One // Soft Additive

Blend DstColor Zero // Multiplicative

Blend DstColor SrcColor // 2x Multiplicative

BlendOp 当这个指令存在，则Blend 指令失效

Add	Add source and destination together.
Sub	Subtract destination from source.
RevSub	Subtract source from destination.
Min	Use the smaller of source and destination.
Max	Use the larger of source and destination.
LogicalClear	Logical operation: Clear (0) DX11.1 only.
LogicalSet	Logical operation: Set (1) DX11.1 only.
LogicalCopy	Logical operation: Copy (s) DX11.1 only.
LogicalCopyInverted	Logical operation: Copy inverted (!s) DX11.1 only.
LogicalNoop	Logical operation: Noop (d) DX11.1 only.
LogicalInvert	Logical operation: Invert (!d) DX11.1 only.
LogicalAnd	Logical operation: And (s & d) DX11.1 only.
LogicalNand	Logical operation: Nand !(s & d) DX11.1 only.
LogicalOr	Logical operation: Or (s \| d) DX11.1 only.
LogicalNor	Logical operation: Nor !(s \| d) DX11.1 only.
LogicalXor	Logical operation: Xor (s ^ d) DX11.1 only.
LogicalEquiv	Logical operation: Equivalence !(s ^ d) DX11.1 only.
LogicalAndReverse	Logical operation: Reverse And (s & !d) DX11.1 only.
LogicalAndInverted	Logical operation: Inverted And (!s & d) DX11.1 only.
LogicalOrReverse	Logical operation: Reverse Or (s \| !d) DX11.1 only.
LogicalOrInverted	Logical operation: Inverted Or (!s \| d) DX11.1 only.