WisCompositeAlpha Struct Reference

Detailed Description

Specification

---

C version:

// Provided by Wisdom 0.7.0.
typedef enum WisCompositeAlpha {
    WisCompositeAlphaOpaque = 0,
    WisCompositeAlphaPreMultiplied = 1,
    WisCompositeAlphaPostMultiplied = 2,
    WisCompositeAlphaInherit = 3,
} WisCompositeAlpha;

C++ version:

namespace wis{
// Provided by Wisdom 0.7.0.
enum class CompositeAlpha {
    Opaque = 0,
    PreMultiplied = 1,
    PostMultiplied = 2,
    Inherit = 3,
};
}

Description

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Composite alpha flags for swapchain creation.

Note

Translates to DXGI_ALPHA_MODE for DirectX 12 implementation, and VkCompositeAlphaFlagBitsKHR for Vulkan implementation.

Values:

• WisCompositeAlphaOpaque = 0: The alpha channel, if it exists, is ignored. The image is treated as opaque.
• WisCompositeAlphaPreMultiplied = 1: The alpha channel, if it exists, is respected and used in compositing. The premultiplied alpha format is expected.
• WisCompositeAlphaPostMultiplied = 2: The alpha channel, if it exists, is respected and used in compositing. The postmultiplied alpha format is expected.
• WisCompositeAlphaInherit = 3: The alpha channel, if it exists, is respected and used in compositing based on the platform's default behavior.

See Also

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See also

Structs: WisSwapchainDesc