| Value | Meaning |
|---|---|
| SDL_GPU_STENCILOP_INVALID | |
| SDL_GPU_STENCILOP_KEEP | Keeps the current value. |
| SDL_GPU_STENCILOP_ZERO | Sets the value to 0. |
| SDL_GPU_STENCILOP_REPLACE | Sets the value to reference. |
| SDL_GPU_STENCILOP_INCREMENT_AND_CLAMP | Increments the current value and clamps to the maximum value. |
| SDL_GPU_STENCILOP_DECREMENT_AND_CLAMP | Decrements the current value and clamps to 0. |
| SDL_GPU_STENCILOP_INVERT | Bitwise-inverts the current value. |
| SDL_GPU_STENCILOP_INCREMENT_AND_WRAP | Increments the current value and wraps back to 0. |
| SDL_GPU_STENCILOP_DECREMENT_AND_WRAP | Decrements the current value and wraps to the maximum value. |
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Specifies what happens to a stored stencil value if stencil tests fail or pass.