typedef Uint32 SDL_BlendOperation;
| SDL_BLENDOPERATION_ADD | 0x1 | dst + src : 全てのレンダラが対応 |
| SDL_BLENDOPERATION_SUBTRACT | 0x2 | src - dst : D3D, OpenGL, OpenGLES, Vulkanが対応 |
| SDL_BLENDOPERATION_REV_SUBTRACT | 0x3 | dst - src : D3D, OpenGL, OpenGLES, Vulkanが対応 |
| SDL_BLENDOPERATION_MINIMUM | 0x4 | min(dst, src) : D3D, OpenGL, OpenGLES, Vulkanが対応 |
| SDL_BLENDOPERATION_MAXIMUM | 0x5 | max(dst, src) : D3D, OpenGL, OpenGLES, Vulkanが対応 |