| Value | Meaning |
|---|---|
| SDL_GPU_BLENDFACTOR_INVALID | |
| SDL_GPU_BLENDFACTOR_ZERO | 0 |
| SDL_GPU_BLENDFACTOR_ONE | 1 |
| SDL_GPU_BLENDFACTOR_SRC_COLOR | source color |
| SDL_GPU_BLENDFACTOR_ONE_MINUS_SRC_COLOR | 1 - source color |
| SDL_GPU_BLENDFACTOR_DST_COLOR | destination color |
| SDL_GPU_BLENDFACTOR_ONE_MINUS_DST_COLOR | 1 - destination color |
| SDL_GPU_BLENDFACTOR_SRC_ALPHA | source alpha |
| SDL_GPU_BLENDFACTOR_ONE_MINUS_SRC_ALPHA | 1 - source alpha |
| SDL_GPU_BLENDFACTOR_DST_ALPHA | destination alpha |
| SDL_GPU_BLENDFACTOR_ONE_MINUS_DST_ALPHA | 1 - destination alpha |
| SDL_GPU_BLENDFACTOR_CONSTANT_COLOR | blend constant |
| SDL_GPU_BLENDFACTOR_ONE_MINUS_CONSTANT_COLOR | 1 - blend constant |
| SDL_GPU_BLENDFACTOR_SRC_ALPHA_SATURATE | min(source alpha, 1 - destination alpha) |
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Specifies a blending factor to be used when pixels in a render target are blended with existing pixels in the texture.
The source color is the value written by the fragment shader. The destination color is the value currently existing in the texture.