SDL_GPUSwapchainComposition

Specifies the texture format and colorspace of the swapchain textures.

Header File

Defined in <SDL3/SDL_gpu.h>

Syntax

typedef enum SDL_GPUSwapchainComposition
{
    SDL_GPU_SWAPCHAINCOMPOSITION_SDR,
    SDL_GPU_SWAPCHAINCOMPOSITION_SDR_LINEAR,
    SDL_GPU_SWAPCHAINCOMPOSITION_HDR_EXTENDED_LINEAR,
    SDL_GPU_SWAPCHAINCOMPOSITION_HDR10_ST2084
} SDL_GPUSwapchainComposition;

Remarks

SDR will always be supported. Other compositions may not be supported on certain systems.

It is recommended to query SDL_WindowSupportsGPUSwapchainComposition after claiming the window if you wish to change the swapchain composition from SDR.

• SDR: B8G8R8A8 or R8G8B8A8 swapchain. Pixel values are in sRGB encoding.
• SDR_LINEAR: B8G8R8A8_SRGB or R8G8B8A8_SRGB swapchain. Pixel values are stored in memory in sRGB encoding but accessed in shaders in "linear sRGB" encoding which is sRGB but with a linear transfer function.
• HDR_EXTENDED_LINEAR: R16G16B16A16_FLOAT swapchain. Pixel values are in extended linear sRGB encoding and permits values outside of the [0, 1] range.
• HDR10_ST2084: A2R10G10B10 or A2B10G10R10 swapchain. Pixel values are in BT.2020 ST2084 (PQ) encoding.

Version

This enum is available since SDL 3.2.0.

See Also

• SDL_SetGPUSwapchainParameters
• SDL_WindowSupportsGPUSwapchainComposition
• SDL_WaitAndAcquireGPUSwapchainTexture

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CategoryAPI, CategoryAPIEnum, CategoryGPU

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