Here is a list of all struct and union fields with links to the structures/unions they belong to:

### - u -

- SDL_UnloadObject : SDL_DYNAPI_jump_table
- SDL_UnlockAudio : SDL_DYNAPI_jump_table
- SDL_UnlockMutex : SDL_DYNAPI_jump_table
- SDL_UnlockTexture : SDL_DYNAPI_jump_table
- SDL_UpdateWindowSurface : SDL_DYNAPI_jump_table
- SDL_UpdateYUVTexture : SDL_DYNAPI_jump_table
- SDL_UpperBlit : SDL_DYNAPI_jump_table
- u : RGB2YUVFactors
- u_b_factor : YUV2RGBParam
- u_g_factor : YUV2RGBParam
- UINT : ITfCandidateListUIElementVtbl , SDL_VideoData
- uint32 : VkClearColorValue
- uiscreen : SDL_DisplayData
- uiscreenmode : SDL_DisplayModeData
- uiwindow : SDL_WindowData
- ulaw_buf : SDL_PrivateAudioData
- ulaw_only : SDL_PrivateAudioData
- ULONG() : ITfCandidateListUIElementVtbl , ITfDocumentMgrVtbl , ITfInputProcessorProfileActivationSinkVtbl , ITfReadingInformationUIElementVtbl , ITfSourceVtbl , ITfThreadMgrExVtbl , ITfThreadMgrVtbl , ITfUIElementMgrVtbl , ITfUIElementSinkVtbl , ITfUIElementVtbl , SDL_VideoData
- unconfined : zwp_confined_pointer_v1_listener
- uniformAndStorageBuffer16BitAccess : VkPhysicalDevice16BitStorageFeaturesKHR
- Uninitialize() : sealed
- unknown : SDL_RWops
- UnlockBuffer() : SDL_BWin
- UnlockDevice : SDL_AudioDriverImpl
- unlocked : zwp_locked_pointer_v1_listener
- UnlockTexture : SDL_Renderer
- unnormalizedCoordinates : VkSamplerCreateInfo
- unused : DIDEVICEINSTANCE , SDL_Keysym , SDL_PrivateAudioData
- uordblks : mallinfo
- up : wl_touch_listener
- UpdateClipRect : SDL_Renderer
- updateFrame : SDL_uikitopenglview
- UpdateTexture : SDL_Renderer
- UpdateTextureYUV : SDL_Renderer
- UpdateViewport : SDL_Renderer
- UpdateWindowFramebuffer : SDL_VideoDevice
- upleft : SDL_QuadTreeChildren
- upright : SDL_QuadTreeChildren
- uReadingBufLen : SDL_VideoData
- usage : recDevice , recElement , VkBufferCreateInfo , VkImageCreateInfo , VkPhysicalDeviceExternalBufferInfoKHR , VkPhysicalDeviceImageFormatInfo2KHR , VkPhysicalDeviceSparseImageFormatInfo2KHR
- usagePage : recDevice , recElement
- use_linux_input : DFB_DeviceData
- use_mitshm : SDL_WindowData
- use_vidmode : SDL_DisplayData
- use_xinerama : SDL_DisplayData
- use_xrandr : SDL_DisplayData
- use_yuv_direct : DFB_DeviceData
- use_yuv_underlays : DFB_DeviceData
- used : recDevice::axis_correct
- user : SDL_Event
- user_time : SDL_WindowData
- userdata : SDL_AudioSpec , SDL_EventWatcher , SDL_HintWatch , SDL_Surface
- userDLL : SDL_VideoData
- userid : haptic_hwdata , recDevice , SDL_hapticlist_item
- userx : SDL_WindowShaper
- usery : SDL_WindowShaper
- uses_gles : SDL_WindowData
- usmblks : mallinfo
- UTF8_STRING : SDL_VideoData