M2/Rendering
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Blending Modes
Wrath of the Lich King and Cataclysm do not use separate alpha blending. Later expansion clients likely do use separate alpha blending.
| Mode | Src Color | Dest Color | Src Alpha | Dest Alpha | |
|---|---|---|---|---|---|
| 0 | Blend_Opaque | GL_ONE | GL_ZERO | - | - |
| 1 | Blend_AlphaKey | GL_ONE | GL_ZERO | - | - |
| 2 | Blend_Alpha | GL_SRC_ALPHA | GL_ONE_MINUS_SRC_ALPHA | - | - |
| 3 | Blend_Add | GL_SRC_ALPHA | GL_ONE | - | - |
| 4 | Blend_Mod | GL_DST_COLOR | GL_ZERO | - | - |
| 5 | Blend_Mod2x | GL_DST_COLOR | GL_SRC_COLOR | - | - |
| 6 | Blend_ModAdd | GL_DST_COLOR | GL_ONE | - | - |
| 7 | Blend_InvSrcAlphaAdd | GL_ONE_MINUS_SRC_ALPHA | GL_ONE | - | - |
| 8 | Blend_InvSrcAlphaOpaque | GL_ONE_MINUS_SRC_ALPHA | GL_ZERO | - | - |
| 9 | Blend_SrcAlphaOpaque | GL_SRC_ALPHA | GL_ZERO | - | - |
| 10 | Blend_NoAlphaAdd | GL_ONE | GL_ONE | - | - |
| 11 | Blend_ConstantAlpha | GL_CONSTANT_ALPHA | GL_ONE_MINUS_CONSTANT_ALPHA | - | - |
| 12 | Blend_Screen | GL_ONE_MINUS_DST_COLOR | GL_ONE | - | - |
| 13 | Blend_BlendAdd | GL_ONE | GL_ONE_MINUS_SRC_ALPHA | - | - |