Display services
The only image data contained in this sysmodule is basically a saved display framebuffer, no image data for actively-used layers/framebuffers.
caps:sc
This is "nn::capsrv::sf::IScreenShotControlService". This is available with [2.0.0+].
| Cmd | Name | Notes |
|---|---|---|
| 1 | ||
| 2 | ||
| 3 | [5.0.0+] ? | Takes a total of 8-bytes of input, no output. |
| 5 | [5.0.0+] ? | Takes a total of 0x10-bytes of input, no output. |
| 210 | [6.0.0+] ? | Takes a total of 0x50-bytes of input, a type-0x15 input buffer, and a type-0x45 input buffer, returns a total of 0x20-bytes of output. |
| [2.0.0-4.1.0] 1001 | Takes a total of 0x10-bytes of input, no output. | |
| [2.0.0-4.1.0] 1002 | Takes a total of 0x18-bytes of input, no output. | |
| [3.0.0-4.1.0] 1003 | Takes a total of 0x58-bytes of input, no output. | |
| 1004 | [5.0.0+] ? | Takes a total of 0x60-bytes of input, no output. |
| 1009 | [5.0.0+] ? | Takes a total of 0x10-bytes of input, no output. |
| 1010 | [5.0.0+] ? | Takes a total of 0x10-bytes of input, no output. |
| 1011 | Takes a total of 8-bytes of input, no output. | |
| 1012 | Takes a total of 8-bytes of input, no output. | |
| 1101 | [4.0.0+] ? | |
| 1106 | [4.0.0+] ? | |
| 1107 | [4.0.0+] ? | |
| 1201 | [3.0.0+] ? | Takes a total of 0x10-bytes of input, returns a total of 0x18-bytes of output. |
| 1202 | [3.0.0+] ? | No input/output. |
| 1203 | [3.0.0+] ? | Takes a total of 8-bytes of input and a type-0x6 output buffer, returns a total of 8-bytes of output. |
- cmd210: User-processes use hard-coded size 0x88 for the type-0x15 buffer.
- cmd1106/1107: User-processes use hard-coded sizes 0x400 and 0x404 for the first/second type-0x15 buffers.
- cmd1201/1202/1203: These are only usable when the previously loaded value from set:sys GetDebugModeFlag is set.
The only caps:sc commands used by GRC are: 1101, 1106, and 1107.
Cmd1
Takes a type-0x46 output buffer, an input u32 layer_stack, two input u64s width/height, an input s64 buffer_count, and an input s64 buffer_index.
width/height must match 1280/720. buffer_index must be < buffer_count. buffer_index and buffer_count must not be negative.
buffer_index and buffer_count correspond to buffers with size 0x384000(1280*720*4).
Value 0 is usable for the input u32.
This takes a screenshot, the output buffer contains the RGBA8 image.
Stubbed with [5.0.0+], where it now returns error 0x7FECE.
Cmd2
Calls the same internal func as cmd1, where the last param is an additional cmd input u64 instead of hard-coded value 0x5f5e100.
Stubbed with [5.0.0+], where it now returns error 0x7FECE.
Cmd1101
Takes two input u64s width/height, a 0x18-byte input struct, and two type-0x46 output buffers.
For the input struct, GRC uses the output from caps:c cmd2101.
width/height must be 1280x720. The first buffer address must be 0x400-byte aligned. The size of the first buffer must be at least width*height, and must be aligned to 0x20000-bytes.
The requirements for the second buffer address/size are the same as the first buffer, except the minimum size is (width*height)/2.
Cmd1106
Takes a 0x40-byte input struct, two input u64s width/height, a 0x18-byte input struct, two type-0x15 input buffers, a type-0x6 output buffer, and two type-0x46 output buffers, returns 3 output u64s.
width/height have same requirements as #Cmd1101. The size of the type-0x6 buffer must be at least 0x7D000. The requirements for the type-0x46 buffers are the same as #Cmd1101.
Cmd1107
Takes a 0x40-byte input struct, two input u64s width/height, a 0x18-byte input struct, two type-0x15 input buffers, a type-0x6 output buffer, and a type-0x45 input buffer, returns 3 output u64s.
width/height have same requirements as #Cmd1101. The size of the type-0x6 buffer must be at least 0x7D000. The size of the type-0x45 buffer must be at least 0x384000.
caps:ss
This is "nn::capsrv::sf::IScreenShotService". This is available with [2.0.0+].
| Cmd | Name |
|---|---|
| 201 | |
| 202 | |
| 203 | |
| 204 |
caps:su
This is "nn::capsrv::sf::IScreenShotApplicationService". This was moved to AM with [6.0.0+].
| Cmd | Name |
|---|---|
| 201 | SaveScreenShot |
| 203 | SaveScreenShotEx0 |
cec-mgr
This is "nn::cec::ICecManager".
| Cmd | Name |
|---|---|
| 0 | |
| 1 | |
| 2 | |
| 3 | |
| 4 | |
| 5 | |
| 6 |
mm:u
This is "nn::mmnv::IRequest".
NVIDIA multimedia (NvMM) platform service.
| Cmd | Name |
|---|---|
| 0 | InitializeOld |
| 1 | FinalizeOld |
| 2 | SetAndWaitOld |
| 3 | GetOld |
| 4 | Initialize |
| 5 | Finalize |
| 6 | SetAndWait |
| 7 | Get |
vi:u
This is "nn::visrv::sf::IApplicationRootService".
| Cmd | Name |
|---|---|
| 0 | GetDisplayService |
GetDisplayService
Returns an #IApplicationDisplayService. Takes an input u32, user-processes use 0 or 1, with 0 for regular-applications normally. 0 = user-service(vi:u), 1 = non-user-service? Returns an error when using value 1 with vi:u(same error listed below for IApplicationDisplayService for unavailable commands).
vi:s
This is "nn::visrv::sf::ISystemRootService".
| Cmd | Name |
|---|---|
| 1 | GetDisplayService |
| 3 | GetDisplayServiceWithProxyNameExchange |
GetDisplayService
Returns an #IApplicationDisplayService. Same input as vi:u.
GetDisplayServiceWithProxyNameExchange
Returns an #IApplicationDisplayService.
vi:m
This is "nn::visrv::sf::IManagerRootService".
| Cmd | Name |
|---|---|
| 2 | GetDisplayService |
| 3 | GetDisplayServiceWithProxyNameExchange |
GetDisplayService
Returns an #IApplicationDisplayService. Same input as vi:u.
GetDisplayServiceWithProxyNameExchange
Takes an input u64 and u32. Returns an #IApplicationDisplayService.
IApplicationDisplayService
This is "nn::visrv::sf::IApplicationDisplayService".
| Cmd | Name |
|---|---|
| 100 | #GetRelayService |
| 101 | #GetSystemDisplayService |
| 102 | #GetManagerDisplayService |
| 103 | [2.0.0+] #GetIndirectDisplayTransactionService |
| 1000 | #ListDisplays |
| 1010 | #OpenDisplay |
| 1011 | #OpenDefaultDisplay |
| 1020 | #CloseDisplay |
| 1101 | #SetDisplayEnabled |
| 1102 | #GetDisplayResolution |
| 2020 | #OpenLayer |
| 2021 | #CloseLayer |
| 2030 | #CreateStrayLayer |
| 2031 | #DestroyStrayLayer |
| 2101 | #SetLayerScalingMode |
| 2102 | [5.0.0+] ConvertScalingMode |
| 2450 | #GetIndirectLayerImageMap |
| 2451 | #GetIndirectLayerImageCropMap |
| 2460 | #GetIndirectLayerImageRequiredMemoryInfo |
| 5202 | #GetDisplayVsyncEvent |
| 5203 | #GetDisplayVsyncEventForDebug |
Available sessions for each service:
- "vi:u": Only GetRelayService.
- "vi:s": Everything except GetManagerDisplayService.
- "vi:m": All.
When attempting to use a get-session cmd with a service it's not available with, error 0xA72 is returned.
These commands using PIDs have AppletResourceUserId as the last input u64, hence AppletResourceUserId must match the user-process PID(no special handling for value 0).
GetRelayService
Returns an IHOSBinderDriver interface which abstracts "nn::visrv::service::RelayServiceImpl".
GetIndirectDisplayTransactionService
Returns an IHOSBinderDriver interface which abstracts "nn::visrv::service::IndirectDisplayTransactionServiceImpl".
GetSystemDisplayService
Returns an #ISystemDisplayService.
GetManagerDisplayService
Returns an #IManagerDisplayService.
ListDisplays
Takes a type-0x6 output buffer containing the array of #DisplayInfo output entries. Returns an output u64: total number of output entries.
Normally(?) this only returns the "Default" display.
OpenDisplay
Takes a #DisplayName as input. Returns an output u64, the DisplayId.
To open the default display, input string "Default" can be used.
OpenDefaultDisplay
Returns an output u64.
Probably not (?) used by newer official user-processes, since those use OpenDisplay with the default string instead.
CloseDisplay
Takes an input u64, DisplayId.
SetDisplayEnabled
Takes an input u32 boolean, and an u64 DisplayId.
GetDisplayResolution
Takes an input u64 DisplayId and returns two output u64s: width and height.
OpenLayer
Takes a PID-descriptor, a type-0x6 buffer for the output #NativeWindow, a #DisplayName(which was previously used with #OpenDisplay), an u64 LayerId, and an u64 AppletResourceUserId. Returns an output u64 NativeWindow_Size.
Official user-processes use a LayerId stored in a global state field("...ExternalLayerId") if non-zero, otherwise:
- When AppletResourceUserId==0, #CreateStrayLayer is used instead of the OpenLayer cmd.
- When AppletResourceUserId!=0, AM_services#CreateManagedDisplayLayer is used and the output from that is used for LayerId with the OpenLayer cmd.
This OpenLayer command returns error 0x272 when the AppletResourceUserId is invalid.
CloseLayer
Takes an input u64: LayerId which was used with #OpenLayer.
CreateStrayLayer
Takes a type-0x6 buffer for the output #NativeWindow, an u32(LayerFlags bitmask), and an u64 DisplayId. Returns two output u64s: LayerId and NativeWindow_Size.
DestroyStrayLayer
Takes an input u64: LayerId from #CreateStrayLayer.
SetLayerScalingMode
Takes an input u64("ScalingMode") and u64 ("LayerId").
GetIndirectLayerImageMap
Takes a PID-descriptor, an type-0x46 buffer, and four u64s: width(s32), height(s32), <output from AM GetIndirectLayerConsumerHandle>, and AppletResourceUserId. Returns two output u64s.
Calls the same func as #GetIndirectLayerImageCropMap internally, with the input floats set to 0.0f, then 1.0f for the rest.
GetIndirectLayerImageCropMap
Takes a PID-descriptor, an type-0x46 buffer, four floats, four u64s(last u64 is AppletResourceUserId). Returns two output u64s. The floats are stored immediately after each other(32bits).
GetIndirectLayerImageRequiredMemoryInfo
Takes two input u64s: width and height. Returns two output u64s. First u64 is the buffer size to use with the ImageMap cmds, second u64 is the buffer address alignment for those cmds.
GetDisplayVsyncEvent
Takes an input u64 DisplayId and returns a handle.
GetDisplayVsyncEventForDebug
Takes an input u64 DisplayId and returns a handle.
ISystemDisplayService
This is "nn::visrv::sf::ISystemDisplayService".
| Cmd | Name |
|---|---|
| 1200 | GetZOrderCountMin |
| 1202 | GetZOrderCountMax |
| 1203 | GetDisplayLogicalResolution |
| 1204 | [3.0.0+] SetDisplayMagnification |
| 2201 | SetLayerPosition |
| 2203 | SetLayerSize |
| 2204 | GetLayerZ |
| 2205 | SetLayerZ |
| 2207 | SetLayerVisibility |
| 2209 | SetLayerAlpha |
| 2312 | [1.0.0-6.2.0] CreateStrayLayer |
| 2400 | OpenIndirectLayer |
| 2401 | CloseIndirectLayer |
| 2402 | FlipIndirectLayer |
| 3000 | ListDisplayModes |
| 3001 | ListDisplayRgbRanges |
| 3002 | ListDisplayContentTypes |
| 3200 | GetDisplayMode |
| 3201 | SetDisplayMode |
| 3202 | GetDisplayUnderscan |
| 3203 | SetDisplayUnderscan |
| 3204 | GetDisplayContentType |
| 3205 | SetDisplayContentType |
| 3206 | GetDisplayRgbRange |
| 3207 | SetDisplayRgbRange |
| 3208 | GetDisplayCmuMode |
| 3209 | SetDisplayCmuMode |
| 3210 | GetDisplayContrastRatio |
| 3211 | SetDisplayContrastRatio |
| 3214 | GetDisplayGamma |
| 3215 | SetDisplayGamma |
| 3216 | GetDisplayCmuLuma |
| 3217 | SetDisplayCmuLuma |
| 8225 | [4.0.0+] GetSharedBufferMemoryHandleId |
| 8250 | [4.0.0+] OpenSharedLayer |
| 8251 | [4.0.0+] CloseSharedLayer |
| 8252 | [4.0.0+] ConnectSharedLayer |
| 8253 | [4.0.0+] DisconnectSharedLayer |
| 8254 | [4.0.0+] AcquireSharedFrameBuffer |
| 8255 | [4.0.0+] PresentSharedFrameBuffer |
| 8256 | [4.0.0+] GetSharedFrameBufferAcquirableEvent |
| 8257 | [4.0.0+] FillSharedFrameBufferColor |
| 8258 | [5.0.0+] CancelSharedFrameBuffer |
IManagerDisplayService
This is "nn::visrv::sf::IManagerDisplayService".
| Cmd | Name |
|---|---|
| 200 | [4.0.0+] AllocateProcessHeapBlock |
| 201 | [4.0.0+] FreeProcessHeapBlock |
| 1102 | GetDisplayResolution |
| 2010 | CreateManagedLayer |
| 2011 | DestroyManagedLayer |
| 2012 | [7.0.0+] CreateStrayLayer |
| 2050 | CreateIndirectLayer |
| 2051 | DestroyIndirectLayer |
| 2052 | CreateIndirectProducerEndPoint |
| 2053 | DestroyIndirectProducerEndPoint |
| 2054 | CreateIndirectConsumerEndPoint |
| 2055 | DestroyIndirectConsumerEndPoint |
| 2300 | AcquireLayerTexturePresentingEvent |
| 2301 | ReleaseLayerTexturePresentingEvent |
| 2302 | GetDisplayHotplugEvent |
| 2402 | GetDisplayHotplugState |
| 2501 | [4.0.0+] GetCompositorErrorInfo |
| 2601 | [4.0.0+] GetDisplayErrorEvent |
| 4201 | SetDisplayAlpha |
| 4203 | SetDisplayLayerStack |
| 4205 | SetDisplayPowerState |
| 4206 | [4.0.0+] SetDefaultDisplay |
| 6000 | AddToLayerStack |
| 6001 | RemoveFromLayerStack |
| 6002 | SetLayerVisibility |
| 6003 | [5.0.0+] SetLayerConfig |
| 6004 | [5.0.0+] AttachLayerPresentationTracer |
| 6005 | [5.0.0+] DetachLayerPresentationTracer |
| 6006 | [5.0.0+] StartLayerPresentationRecording |
| 6007 | [5.0.0+] StopLayerPresentationRecording |
| 6008 | [5.0.0+] StartLayerPresentationFenceWait |
| 6009 | [5.0.0+] StopLayerPresentationFenceWait |
| 6010 | [5.0.0+] GetLayerPresentationAllFencesExpiredEvent |
| 6011 | [7.0.0+] EnableLayerAutoClearTransitionBuffer |
| 6012 | [7.0.0+] DisableLayerAutoClearTransitionBuffer |
| 7000 | SetContentVisibility |
| 8000 | SetConductorLayer |
| 8100 | SetIndirectProducerFlipOffset |
| 8200 | [4.0.0+] CreateSharedBufferStaticStorage |
| 8201 | [4.0.0+] CreateSharedBufferTransferMemory |
| 8202 | [4.0.0+] DestroySharedBuffer |
| 8203 | [4.0.0+] BindSharedLowLevelLayerToManagedLayer |
| 8204 | [4.0.0+] BindSharedLowLevelLayerToIndirectLayer |
| 8207 | [4.0.0+] UnbindSharedLowLevelLayer |
| 8208 | [4.0.0+] ConnectSharedLowLevelLayerToSharedBuffer |
| 8209 | [4.0.0+] DisconnectSharedLowLevelLayerFromSharedBuffer |
| 8210 | [4.0.0+] CreateSharedLayer |
| 8211 | [4.0.0+] DestroySharedLayer |
| 8216 | [4.0.0+] AttachSharedLayerToLowLevelLayer |
| 8217 | [4.0.0+] ForceDetachSharedLayerFromLowLevelLayer |
| 8218 | [4.0.0+] StartDetachSharedLayerFromLowLevelLayer |
| 8219 | [4.0.0+] FinishDetachSharedLayerFromLowLevelLayer |
| 8220 | [4.0.0+] GetSharedLayerDetachReadyEvent |
| 8221 | [4.0.0+] GetSharedLowLevelLayerSynchronizedEvent |
| 8222 | [4.0.0+] CheckSharedLowLevelLayerSynchronized |
| 8223 | [4.0.0+] RegisterSharedBufferImporterAruid |
| 8224 | [4.0.0+] UnregisterSharedBufferImporterAruid |
| 8227 | [4.0.0+] CreateSharedBufferProcessHeap |
| 8228 | [4.0.0+] GetSharedLayerLayerStacks |
| 8229 | [4.0.0+] SetSharedLayerLayerStacks |
| 8291 | [4.0.0+] PresentDetachedSharedFrameBufferToLowLevelLayer |
| 8292 | [4.0.0+] FillDetachedSharedFrameBufferColor |
| 8293 | [4.0.0+] GetDetachedSharedFrameBufferImage |
| 8294 | [4.0.0+] SetDetachedSharedFrameBufferImage |
| 8295 | [4.0.0+] CopyDetachedSharedFrameBufferImage |
| 8296 | [4.0.0+] SetDetachedSharedFrameBufferSubImage |
| 8297 | [4.0.0+] GetSharedFrameBufferContentParameter |
| 8298 | [5.0.0+] ExpandStartupLogoOnSharedFrameBuffer |
DisplayInfo
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x40 | #DisplayName |
| 0x40 | 0x1 | Whether or not the display has a constrained number of layers. |
| 0x41 | 0x7 | Padding/Reserved |
| 0x48 | 0x8 | If this display has a constrained number of layers (0x40 is set), indicates the maximum number of layers. |
| 0x50 | 0x8 | Width in pixels |
| 0x58 | 0x8 | Height in pixels |
This is a 0x60-byte structure.
The width/height for the "Default" Display is the resolution for 1080p even when in handheld-mode.
DisplayName
This is a 0x40-byte block: a NUL-terminated string.
Can be "Default", "External", "Edid", "Internal" or "Null".
Parcel
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x4 | ParcelDataSize |
| 0x4 | 0x4 | ParcelDataOffset |
| 0x8 | 0x4 | ParcelObjectsSize |
| 0xC | 0x4 | ParcelObjectsOffset |
| 0x10 | ? | FlattenedBinder |
NativeWindow
Max size of this buffer is 0x100-bytes(outbuf size used by official user-processes). Parsed("...DeserializeNativeWindow()") by a function called by the code described under #OpenLayer, which executes code with Android symbols.
This is a #Parcel.
ParcelData
This normally contains the following:
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x4 | 0x2 |
| 0x4 | 0x4 | Probably the user-process PID? |
| 0x8 | 0x4 | ID |
| 0xC | 0xC | All-zero normally? |
| 0x18 | 0x8 | NUL-terminated "dispdrv" string. |
| 0x20 | 0x8 | All-zero normally? |
The above ID is used for the ID param for the binder commands with IHOSBinderDriver.
ParcelObjects
This normally contains an u32 with value 0?
Resolution handling
There doesn't seem to be a way to get the actual TV resolution while using the "Default" Display. Official apps just hard-code what resolution to use depending on the current OperationMode.