NativeWindow

Overview

The NativeWindow module provides the image buffer rotation capability, compatible with EGL. As the producer of the image buffer, your application produces the buffer and transfers the buffer through NativeWindow for the consumer to read.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 8

Summary

Files

Name	Description
external_window.h	Declares the functions for obtaining and using NativeWindow.

Structs

Name	Description
struct Region	Describes the rectangle (dirty region) where the content is to be updated in the local OHNativeWindow.
struct OHHDRMetaData	Describes the HDR metadata. Deprecated: This struct is deprecated since API version 10. No substitute is provided.
struct OHExtDataHandle	Describes the extended data handle. Deprecated: This struct is deprecated since API version 10. No substitute is provided.
struct BufferHandle	Describes the buffer handle, which is used to transfer and obtain buffer information. The handle contains the file descriptor, size, format, usage, virtual address, shared memory key, physical address, and custom data of the buffer.

Types

Name	Description
typedef struct OHIPCParcel OHIPCParcel	Provides access to OHIPCParcel, which is an IPC parcelable object.
typedef struct NativeWindow OHNativeWindow	Provides the capability of accessing the OHNativeWindow.
typedef struct NativeWindowBuffer OHNativeWindowBuffer	Provides the capability of accessing the OHNativeWindowBuffer.
typedef struct Region Region	Defines a struct for the rectangle (dirty region) where the content is to be updated in the local OHNativeWindow.
typedef enum OHNativeErrorCode OHNativeErrorCode	Defines an enum for the error codes.
typedef enum NativeWindowOperation NativeWindowOperation	Defines an enum for the operation codes in the OH_NativeWindow_NativeWindowHandleOpt function.
typedef enum OHScalingModeV2 OHScalingModeV2	Defines an enum for the rendering scaling modes.
typedef enum OHSurfaceSource OHSurfaceSource	Defines an enum for the sources of content displayed in the local window.

Enums

Name	Description
NativeWindowOperation { SET_BUFFER_GEOMETRY, GET_BUFFER_GEOMETRY, GET_FORMAT, SET_FORMAT, GET_USAGE, SET_USAGE, SET_STRIDE, GET_STRIDE, SET_SWAP_INTERVAL, GET_SWAP_INTERVAL, SET_TIMEOUT, GET_TIMEOUT, SET_COLOR_GAMUT, GET_COLOR_GAMUT, SET_TRANSFORM, GET_TRANSFORM, SET_UI_TIMESTAMP, GET_BUFFERQUEUE_SIZE, SET_SOURCE_TYPE, GET_SOURCE_TYPE, SET_APP_FRAMEWORK_TYPE, GET_APP_FRAMEWORK_TYPE, SET_HDR_WHITE_POINT_BRIGHTNESS, SET_SDR_WHITE_POINT_BRIGHTNESS, SET_DESIRED_PRESENT_TIMESTAMP = 24 }	Enumerates the operation codes in the OH_NativeWindow_NativeWindowHandleOpt function.
OHScalingMode { OH_SCALING_MODE_FREEZE = 0, OH_SCALING_MODE_SCALE_TO_WINDOW, OH_SCALING_MODE_SCALE_CROP, OH_SCALING_MODE_NO_SCALE_CROP }	Enumerates the scaling modes. Deprecated: This enum is deprecated since API version 10. No substitute is provided.
OHScalingModeV2 { OH_SCALING_MODE_FREEZE_V2 = 0, OH_SCALING_MODE_SCALE_TO_WINDOW_V2, OH_SCALING_MODE_SCALE_CROP_V2, OH_SCALING_MODE_NO_SCALE_CROP_V2, OH_SCALING_MODE_SCALE_FIT_V2 }	Enumerates the rendering scaling modes.
OHHDRMetadataKey { OH_METAKEY_RED_PRIMARY_X = 0, OH_METAKEY_RED_PRIMARY_Y = 1, OH_METAKEY_GREEN_PRIMARY_X = 2, OH_METAKEY_GREEN_PRIMARY_Y = 3, OH_METAKEY_BLUE_PRIMARY_X = 4, OH_METAKEY_BLUE_PRIMARY_Y = 5, OH_METAKEY_WHITE_PRIMARY_X = 6, OH_METAKEY_WHITE_PRIMARY_Y = 7, OH_METAKEY_MAX_LUMINANCE = 8, OH_METAKEY_MIN_LUMINANCE = 9, OH_METAKEY_MAX_CONTENT_LIGHT_LEVEL = 10, OH_METAKEY_MAX_FRAME_AVERAGE_LIGHT_LEVEL = 11, OH_METAKEY_HDR10_PLUS = 12, OH_METAKEY_HDR_VIVID = 13 }	Enumerates the HDR metadata keys. Deprecated: This enum is deprecated since API version 10. No substitute is provided.
OHNativeErrorCode { NATIVE_ERROR_OK = 0, NATIVE_ERROR_MEM_OPERATION_ERROR = 30001000, NATIVE_ERROR_INVALID_ARGUMENTS = 40001000, NATIVE_ERROR_NO_PERMISSION = 40301000, NATIVE_ERROR_NO_BUFFER = 40601000, NATIVE_ERROR_NO_CONSUMER = 41202000, NATIVE_ERROR_NOT_INIT = 41203000, NATIVE_ERROR_CONSUMER_CONNECTED = 41206000, NATIVE_ERROR_BUFFER_STATE_INVALID = 41207000, NATIVE_ERROR_BUFFER_IN_CACHE = 41208000, NATIVE_ERROR_BUFFER_QUEUE_FULL = 41209000, NATIVE_ERROR_BUFFER_NOT_IN_CACHE = 41210000,NATIVE_ERROR_CONSUMER_DISCONNECTED = 41211000,NATIVE_ERROR_CONSUMER_NO_LISTENER_REGISTERED = 41212000, NATIVE_ERROR_UNSUPPORTED = 50102000, NATIVE_ERROR_UNKNOWN = 50002000, NATIVE_ERROR_HDI_ERROR = 50007000,NATIVE_ERROR_BINDER_ERROR = 50401000,NATIVE_ERROR_EGL_STATE_UNKNOWN = 60001000, NATIVE_ERROR_EGL_API_FAILED = 60002000 }	Enumerates the error codes.
OHSurfaceSource { OH_SURFACE_SOURCE_DEFAULT = 0, OH_SURFACE_SOURCE_UI, OH_SURFACE_SOURCE_GAME, OH_SURFACE_SOURCE_CAMERA,OH_SURFACE_SOURCE_VIDEO }	Enumerates the sources of content displayed in the local window.

Functions

Name	Description
OHNativeWindow * OH_NativeWindow_CreateNativeWindow (void *pSurface)	Creates an OHNativeWindow instance. A new OHNativeWindow instance is created each time this function is called. If this function is unavailable, you can create an OHNativeWindow instance by calling OH_NativeImage_AcquireNativeWindow or through the XComponent.
void OH_NativeWindow_DestroyNativeWindow (OHNativeWindow *window)	Decreases the reference count of an OHNativeWindow instance by 1 and when the reference count reaches 0, destroys the instance.
OHNativeWindowBuffer * OH_NativeWindow_CreateNativeWindowBufferFromSurfaceBuffer (void *pSurfaceBuffer)	Creates an OHNativeWindowBuffer instance. A new OHNativeWindowBuffer instance is created each time this function is called. This function is deprecated since API version 12 and replaced by OH_NativeWindow_CreateNativeWindowBufferFromNativeBuffer.
OHNativeWindowBuffer * OH_NativeWindow_CreateNativeWindowBufferFromNativeBuffer (OH_NativeBuffer *nativeBuffer)	Creates an OHNativeWindowBuffer instance. A new OHNativeWindowBuffer instance is created each time this function is called.
void OH_NativeWindow_DestroyNativeWindowBuffer (OHNativeWindowBuffer *buffer)	Decreases the reference count of an OHNativeWindowBuffer instance by 1 and when the reference count reaches 0, destroys the instance.
int32_t OH_NativeWindow_NativeWindowRequestBuffer (OHNativeWindow *window, OHNativeWindowBuffer **buffer, int *fenceFd)	Requests an OHNativeWindowBuffer through an OHNativeWindow instance for content production.
int32_t OH_NativeWindow_NativeWindowFlushBuffer (OHNativeWindow *window, OHNativeWindowBuffer *buffer, int fenceFd, Region region)	Flushes the OHNativeWindowBuffer filled with the produced content to the buffer queue through an OHNativeWindow instance for content consumption.
int32_t OH_NativeWindow_GetLastFlushedBuffer (OHNativeWindow *window, OHNativeWindowBuffer **buffer, int *fenceFd, float matrix[16])	Obtains the OHNativeWindowBuffer that was flushed to the buffer queue last time through an OHNativeWindow instance.
int32_t OH_NativeWindow_NativeWindowAbortBuffer (OHNativeWindow *window, OHNativeWindowBuffer *buffer)	Returns the OHNativeWindowBuffer to the buffer queue through an OHNativeWindow instance, without filling in any content. The OHNativeWindowBuffer can be used for a new request.
int32_t OH_NativeWindow_NativeWindowHandleOpt (OHNativeWindow *window, int code,…)	Sets or obtains the attributes of an OHNativeWindow instance, including the width, height, and content format.
BufferHandle * OH_NativeWindow_GetBufferHandleFromNative (OHNativeWindowBuffer *buffer)	Obtains the pointer to a BufferHandle of an OHNativeWindowBuffer instance. This function is not thread-safe.
int32_t OH_NativeWindow_NativeObjectReference (void *obj)	Adds the reference count of a native object.
int32_t OH_NativeWindow_NativeObjectUnreference (void *obj)	Decreases the reference count of a native object and, when the reference count reaches 0, destroys this object.
int32_t OH_NativeWindow_GetNativeObjectMagic (void *obj)	Obtains the magic ID of a native object.
int32_t OH_NativeWindow_NativeWindowSetScalingMode (OHNativeWindow *window, uint32_t sequence, OHScalingMode scalingMode)	Sets a scaling mode for an OHNativeWindow. Deprecated: This function is deprecated since API version 10. No substitute is provided.
int32_t OH_NativeWindow_NativeWindowSetMetaData (OHNativeWindow *window, uint32_t sequence, int32_t size, const OHHDRMetaData *metaData)	Sets metadata for an OHNativeWindow. Deprecated: This function is deprecated since API version 10. No substitute is provided.
int32_t OH_NativeWindow_NativeWindowSetMetaDataSet (OHNativeWindow *window, uint32_t sequence, OHHDRMetadataKey key, int32_t size, const uint8_t *metaData)	Sets a metadata set for an OHNativeWindow. Deprecated: This function is deprecated since API version 10. No substitute is provided.
int32_t OH_NativeWindow_NativeWindowSetTunnelHandle (OHNativeWindow *window, const OHExtDataHandle *handle)	Sets a tunnel handle to an OHNativeWindow. Deprecated: This function is deprecated since API version 10. No substitute is provided.
int32_t OH_NativeWindow_NativeWindowAttachBuffer (OHNativeWindow *window, OHNativeWindowBuffer *buffer)	Attaches an OHNativeWindowBuffer to an OHNativeWindow instance.
int32_t OH_NativeWindow_NativeWindowDetachBuffer (OHNativeWindow *window, OHNativeWindowBuffer *buffer)	Detaches an OHNativeWindowBuffer from an OHNativeWindow instance.
int32_t OH_NativeWindow_GetSurfaceId (OHNativeWindow *window, uint64_t *surfaceId)	Obtains a surface ID through an OHNativeWindow.
int32_t OH_NativeWindow_CreateNativeWindowFromSurfaceId (uint64_t surfaceId, OHNativeWindow **window)	Creates an OHNativeWindow instance based on a surface ID.
int32_t OH_NativeWindow_NativeWindowSetScalingModeV2 (OHNativeWindow *window, OHScalingModeV2 scalingMode)	Sets a rendering scaling mode for an OHNativeWindow instance.
int32_t OH_NativeWindow_GetLastFlushedBufferV2 (OHNativeWindow *window, OHNativeWindowBuffer **buffer, int *fenceFd, float matrix[16])	Obtains the OHNativeWindowBuffer that was flushed to the buffer queue last time through an OHNativeWindow instance. The difference between this function and OH_NativeWindow_GetLastFlushedBuffer lies in the matrix.
void OH_NativeWindow_SetBufferHold (OHNativeWindow *window)	Buffers a frame in advance and holds it for the interval of a frame to offset the possible loss of subsequent oversized frames.
int32_t OH_NativeWindow_WriteToParcel (OHNativeWindow *window, OHIPCParcel *parcel)	Writes an OHNativeWindow instance to an OHIPCParcel instance.
int32_t OH_NativeWindow_ReadFromParcel (OHIPCParcel *parcel, OHNativeWindow **window)	Reads an OHNativeWindow instance from an OHIPCParcel instance.
int32_t OH_NativeWindow_SetColorSpace (OHNativeWindow *window, OH_NativeBuffer_ColorSpace colorSpace)	Sets the color space for an OHNativeWindow instance.
int32_t OH_NativeWindow_GetColorSpace (OHNativeWindow *window, OH_NativeBuffer_ColorSpace *colorSpace)	Obtains the color space of an OHNativeWindow instance.
int32_t OH_NativeWindow_SetMetadataValue (OHNativeWindow *window, OH_NativeBuffer_MetadataKey metadataKey, int32_t size, uint8_t *metaData)	Sets a metadata value for an OHNativeWindow instance.
int32_t OH_NativeWindow_GetMetadataValue (OHNativeWindow *window, OH_NativeBuffer_MetadataKey metadataKey, int32_t *size, uint8_t **metaData)	Obtains the metadata value of an OHNativeWindow instance.

Type Description

OHSurfaceSource

typedef enum OHSurfaceSource OHSurfaceSource

Description

Defines an enum for the sources of content displayed in the local window.

Since: 12

OHIPCParcel

typedef struct OHIPCParcel OHIPCParcel

Description

Provides access to OHIPCParcel, which is an IPC parcelable object.

Since: 12

NativeWindowOperation

typedef enum NativeWindowOperation NativeWindowOperation

Description

Defines an enum for the operation codes in the OH_NativeWindow_NativeWindowHandleOpt function.

Since: 8

OHNativeErrorCode

typedef enum OHNativeErrorCode OHNativeErrorCode

Description

Defines an enum for the error codes.

Since: 12

OHNativeWindow

typedef struct NativeWindow OHNativeWindow

Description

Provides the capability of accessing the OHNativeWindow.

Since: 8

OHNativeWindowBuffer

typedef struct NativeWindowBuffer OHNativeWindowBuffer

Description

Provides the capability of accessing the OHNativeWindowBuffer.

Since: 8

OHScalingModeV2

typedef enum OHScalingModeV2 OHScalingModeV2

Description

Defines an enum for the rendering scaling modes.

Since: 12

Region

typedef struct Region Region

Description

Defines a struct for the rectangle (dirty region) where the content is to be updated in the local OHNativeWindow.

Since: 8

Enum Description

OHSurfaceSource

enum OHSurfaceSource

Description

Enumerates the sources of content displayed in the local window.

Since: 12

Value	Description
OH_SURFACE_SOURCE_DEFAULT	Default source.
OH_SURFACE_SOURCE_UI	The window content comes from UIs.
OH_SURFACE_SOURCE_GAME	The window content comes from games.
OH_SURFACE_SOURCE_CAMERA	The window content comes from cameras.
OH_SURFACE_SOURCE_VIDEO	The window content comes from videos.

OHNativeErrorCode

enum OHNativeErrorCode

Description

Enumerates the error codes.

Since: 12

Value	Description
NATIVE_ERROR_OK	The operation is successful.
NATIVE_ERROR_MEM_OPERATION_ERROR15+	An error occurs during memory manipulation.
NATIVE_ERROR_INVALID_ARGUMENTS	An input parameter is invalid.
NATIVE_ERROR_NO_PERMISSION	You do not have the permission to perform the operation.
NATIVE_ERROR_NO_BUFFER	No buffer is available.
NATIVE_ERROR_NO_CONSUMER	The consumer does not exist.
NATIVE_ERROR_NOT_INIT	Not initialized.
NATIVE_ERROR_CONSUMER_CONNECTED	The consumer is connected.
NATIVE_ERROR_BUFFER_STATE_INVALID	The buffer status does not meet the expectation.
NATIVE_ERROR_BUFFER_IN_CACHE	The buffer is already in the buffer queue.
NATIVE_ERROR_BUFFER_QUEUE_FULL	The queue is full.
NATIVE_ERROR_BUFFER_NOT_IN_CACHE	The buffer is not in the buffer queue.
NATIVE_ERROR_CONSUMER_DISCONNECTED	The consumer is disconnected.
NATIVE_ERROR_CONSUMER_NO_LISTENER_REGISTERED	No listener is registered on the consumer side.
NATIVE_ERROR_UNSUPPORTED	The device or platform does not support the operation.
NATIVE_ERROR_UNKNOWN	Unknown error. Check the log.
NATIVE_ERROR_HDI_ERROR	Failed to call the HDI.
NATIVE_ERROR_BINDER_ERROR	Cross-process communication failed.
NATIVE_ERROR_EGL_STATE_UNKNOWN	The EGL environment is abnormal.
NATIVE_ERROR_EGL_API_FAILED	Failed to call the EGL APIs.

NativeWindowOperation

enum NativeWindowOperation

Description

Enumerates the operation codes in the OH_NativeWindow_NativeWindowHandleOpt function.

Since: 8

Value	Description
SET_BUFFER_GEOMETRY	Setting the geometry for the local window buffer. Variable arguments in the function: [Input] int32_t width and [Input] int32_t height.
GET_BUFFER_GEOMETRY	Obtaining the geometry of the local window buffer. Variable arguments in the function: [Output] int32_t *height and [Output] int32_t *width.
GET_FORMAT	Obtaining the format of the local window buffer. Variable argument in the function: [Output] int32_t *format. For details about the available options, see OH_NativeBuffer_Format.
SET_FORMAT	Setting the format for the local window buffer. Variable argument in the function: [Input] int32_t format. For details about the available options, see OH_NativeBuffer_Format.
GET_USAGE	Obtaining the usage mode of the local window buffer. Variable argument in the function: [Output] uint64_t *usage. For details about the available options, see OH_NativeBuffer_Usage.
SET_USAGE	Setting the usage mode for the local window buffer. Variable argument in the function: [Input] uint64_t usage. For details about the available options, see OH_NativeBuffer_Usage.
SET_STRIDE(deprecated)	Setting the stride for the local window buffer. Variable argument in the function: [Input] int32_t stride. Deprecated: This API is deprecated since API version 16.
GET_STRIDE(deprecated)	Obtaining the stride of the local window buffer. Variable argument in the function: [Output] int32_t *stride. Deprecated: This API is deprecated since API version 16. Substitute: Use OH_NativeWindow_GetBufferHandleFromNative to obtain a BufferHandle instance, and obtain the stride from this instance.
SET_SWAP_INTERVAL	Setting the swap interval for the local window buffer. Variable argument in the function: [Input] int32_t interval.
GET_SWAP_INTERVAL	Obtaining the swap interval of the local window buffer. Variable argument in the function: [Output] int32_t *interval.
SET_TIMEOUT	Setting the timeout duration for requesting the local window buffer, in ms. Default value: 3000 ms. Variable argument in the function: [Input] int32_t timeout.
GET_TIMEOUT	Obtaining the timeout duration for requesting the local window buffer, in ms. Default value: 3000 ms. Variable argument in the function: [Output] int32_t *timeout.
SET_COLOR_GAMUT	Setting the color gamut for the local window buffer. Variable argument in the function: [Input] int32_t colorGamut. For details about the available options, see OH_NativeBuffer_ColorGamut.
GET_COLOR_GAMUT	Obtaining the color gamut of the local window buffer. Variable argument in the function: [Output] int32_t *colorGamut. For details about the available options, see OH_NativeBuffer_ColorGamut.
SET_TRANSFORM	Setting the transform for the local window buffer. Variable argument in the function: [Input] int32_t transform. For details about the available options, see OH_NativeBuffer_TransformType.
GET_TRANSFORM	Obtaining the transform of the local window buffer. Variable argument in the function: [Output] int32_t *transform. For details about the available options, see OH_NativeBuffer_TransformType.
SET_UI_TIMESTAMP	Setting the UI timestamp for the local window buffer. Variable argument in the function: [Input] uint64_t uiTimestamp.
GET_BUFFERQUEUE_SIZE12+	Obtaining the memory queue size. Variable argument in the function: [Output] int32_t *size.
SET_SOURCE_TYPE12+	Setting the source of content displayed in the local window. Variable argument in the function: [Input] int32_t sourceType. For details about the available options, see OHSurfaceSource.
GET_SOURCE_TYPE12+	Obtaining the source of content displayed in the local window. Variable argument in the function: [Output] int32_t *sourceType. For details about the available options, see OHSurfaceSource.
SET_APP_FRAMEWORK_TYPE12+	Setting the application framework name of the local window. Variable argument in the function: [Input] char* frameworkType. A maximum of 64 bytes are supported.
GET_APP_FRAMEWORK_TYPE12+	Obtaining the application framework name of the local window. Variable argument in the function: [Output] char* frameworkType.
SET_HDR_WHITE_POINT_BRIGHTNESS12+	Setting the brightness of HDR white points. Variable arguments in the function: [Input] float brightness. The value range is [0.0f, 1.0f].
SET_SDR_WHITE_POINT_BRIGHTNESS12+	Setting the brightness of SDR white points. Variable arguments in the function: [Input] float brightness. The value range is [0.0f, 1.0f].
SET_DESIRED_PRESENT_TIMESTAMP13+	Setting a timestamp indicating when the local window buffer is expected to show on the screen. The timestamp takes effect only when RenderService is the consumer of the local window and after OH_NativeWindow_NativeWindowFlushBuffer is called. The next buffer added to the queue by the producer is consumed by RenderService and displayed on the screen only after the expected on-screen time arrives. If there are multiple buffers in the queue from various producers, all of them have set desiredPresentTimestamp, and the desired time arrives, the buffer that was enqueued earliest will be pushed back into the queue by the consumer. If the expected on-screen time exceeds the time provided by the consumer by over 1 second, the expected timestamp is ignored. Variable argument in the function: [Input] int64_t desiredPresentTimestamp. The value must be greater than 0 and should be generated by the standard library std::chrono::steady_clock, in nanoseconds.

OHHDRMetadataKey

enum OHHDRMetadataKey

Description

Enumerates the HDR metadata keys.

Since: 9

Deprecated: This enum is deprecated since API version 10. No substitute is provided.

Value	Description
OH_METAKEY_RED_PRIMARY_X	X coordinate of the red primary color.
OH_METAKEY_RED_PRIMARY_Y	Y coordinate of the red primary color.
OH_METAKEY_GREEN_PRIMARY_X	X coordinate of the green primary color.
OH_METAKEY_GREEN_PRIMARY_Y	Y coordinate of the green primary color.
OH_METAKEY_BLUE_PRIMARY_X	X coordinate of the blue primary color.
OH_METAKEY_BLUE_PRIMARY_Y	Y coordinate of the blue primary color.
OH_METAKEY_WHITE_PRIMARY_X	X coordinate of the white point.
OH_METAKEY_WHITE_PRIMARY_Y	Y coordinate of the white point.
OH_METAKEY_MAX_LUMINANCE	Maximum luminance.
OH_METAKEY_MIN_LUMINANCE	Minimum luminance.
OH_METAKEY_MAX_CONTENT_LIGHT_LEVEL	Maximum content light level (MaxCLL).
OH_METAKEY_MAX_FRAME_AVERAGE_LIGHT_LEVEL	Maximum frame average light level (MaxFALLL).
OH_METAKEY_HDR10_PLUS	HDR10 Plus.
OH_METAKEY_HDR_VIVID	Vivid.

OHScalingMode

enum OHScalingMode

Description

Enumerates the scaling modes.

Since: 9

Deprecated: This enum is deprecated since API version 10. No substitute is provided.

Value	Description
OH_SCALING_MODE_FREEZE	The window content cannot be updated before the buffer of the window size is received.
OH_SCALING_MODE_SCALE_TO_WINDOW	The buffer is scaled in two dimensions to match the window size.
OH_SCALING_MODE_SCALE_CROP	The buffer is scaled uniformly so that its smaller size can match the window size.
OH_SCALING_MODE_NO_SCALE_CROP	The window is cropped to the size of the buffer’s cropping rectangle. Pixels outside the cropping rectangle are considered completely transparent.

OHScalingModeV2

enum OHScalingModeV2

Description

Enumerates the rendering scaling modes.

Since: 12

Value	Description
OH_SCALING_MODE_FREEZE_V2	Freezes the window. The window content is not updated until a buffer with the same size as the window is received.
OH_SCALING_MODE_SCALE_TO_WINDOW_V2	Scales the buffer to match the window size.
OH_SCALING_MODE_SCALE_CROP_V2	Scales the buffer at the original aspect ratio to enable the smaller side of the buffer to match the window, while making the excess part transparent.
OH_SCALING_MODE_NO_SCALE_CROP_V2	Crops the buffer by window size. Pixels outside the cropping rectangle are considered completely transparent.
OH_SCALING_MODE_SCALE_FIT_V2	Scales the buffer at the original aspect ratio to fully display the buffer content, while filling the unfilled area of the window with the background color. This mode is not available for the development board and Emulator.

Function Description

OH_NativeWindow_SetColorSpace()

int32_t OH_NativeWindow_SetColorSpace (OHNativeWindow *window, OH_NativeBuffer_ColorSpace colorSpace )

Description

Sets the color space for an OHNativeWindow instance.

This function is not thread-safe.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 12

Parameters

Name	Description
window	Pointer to an OHNativeWindow instance.
colorSpace	Color space. For details about the available options, see OH_NativeBuffer_ColorSpace.

Returns

Returns 0 if the operation is successful; returns an error code defined in OHNativeErrorCode otherwise.

OH_NativeWindow_SetMetadataValue()

int32_t OH_NativeWindow_SetMetadataValue (OHNativeWindow *window, OH_NativeBuffer_MetadataKey metadataKey, int32_t size, uint8_t * metaData )

Description

Sets a metadata value for an OHNativeWindow instance.

This function is not thread-safe.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 12

Parameters

Name	Description
window	Pointer to an OHNativeWindow instance.
metadataKey	Key of the metadata. For details about the available options, see OH_NativeBuffer_MetadataKey.
size	Size of the uint8_t vector. For details about the available options, see OH_NativeBuffer_MetadataKey.
metaData	Pointer to the uint8_t vector.

Returns

Returns 0 if the operation is successful; returns an error code defined in OHNativeErrorCode otherwise.

OH_NativeWindow_GetColorSpace()

int32_t OH_NativeWindow_GetColorSpace (OHNativeWindow *window, OH_NativeBuffer_ColorSpace *colorSpace )

Description

Obtains the color space of an OHNativeWindow instance.

This function is not thread-safe.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 12

Parameters

Name	Description
window	Pointer to an OHNativeWindow instance.
colorSpace	Pointer to the color space. For details about the available options, see OH_NativeBuffer_ColorSpace.

Returns

Returns 0 if the operation is successful; returns an error code defined in OHNativeErrorCode otherwise.

OH_NativeWindow_GetMetadataValue()

int32_t OH_NativeWindow_GetMetadataValue (OHNativeWindow *window, OH_NativeBuffer_MetadataKey metadataKey, int32_t *size, uint8_t **metaData )

Description

Obtains the metadata value of an OHNativeWindow instance.

This function is not thread-safe.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 12

Parameters

Name	Description
window	Pointer to an OHNativeWindow instance.
metadataKey	Key of the metadata. For details about the available options, see OH_NativeBuffer_MetadataKey.
size	Pointer to the size of the uint8_t vector. For details about the available options, see OH_NativeBuffer_MetadataKey.
metaData	Double pointer to the uint8_t vector.

Returns

Returns 0 if the operation is successful; returns an error code defined in OHNativeErrorCode otherwise.

OH_NativeWindow_WriteToParcel()

int32_t OH_NativeWindow_WriteToParcel (OHNativeWindow *window, OHIPCParcel *parcel )

Description

Writes an OHNativeWindow instance to an OHIPCParcel instance.

This function is not thread-safe.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 12

Parameters

Name	Description
window	Pointer to an OHNativeWindow instance.
parcel	Pointer to an OHIPCParcel instance.

Returns

Returns 0 if the operation is successful; returns an error code defined in OHNativeErrorCode otherwise.

OH_NativeWindow_ReadFromParcel()

int32_t OH_NativeWindow_ReadFromParcel (OHIPCParcel *parcel, OHNativeWindow **window )

Description

Reads an OHNativeWindow instance from an OHIPCParcel instance.

This function is not thread-safe.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 12

Parameters

Name	Description
parcel	Pointer to an OHIPCParcel instance.
window	Double pointer to an OHNativeWindow instance.

Returns

Returns 0 if the operation is successful; returns an error code defined in OHNativeErrorCode otherwise.

OH_NativeWindow_GetLastFlushedBufferV2()

int32_t OH_NativeWindow_GetLastFlushedBufferV2 (OHNativeWindow *window, OHNativeWindowBuffer **buffer, int *fenceFd, float matrix[16] )

Description

Obtains the OHNativeWindowBuffer that was flushed to the buffer queue last time through an OHNativeWindow instance. The difference between this function and OH_NativeWindow_GetLastFlushedBuffer lies in the matrix.

This function must be used in pair with OH_NativeWindow_NativeObjectUnreference. Otherwise, memory leak occurs.

This function is not thread-safe.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 12

Parameters

Name	Description
window	Pointer to an OHNativeWindow instance.
buffer	Double pointer to an OHNativeWindowBuffer instance.
fenceFd	Pointer to a file descriptor.
matrix	Retrieved 4*4 transformation matrix.

Returns

Returns 0 if the operation is successful; returns an error code defined in OHNativeErrorCode otherwise.

OH_NativeWindow_SetBufferHold()

void OH_NativeWindow_SetBufferHold (OHNativeWindow *window)

Description Buffers a frame in advance and holds it for the interval of a frame to offset the possible loss of subsequent oversized frames.

This function is not thread-safe.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 12

Parameters

Name	Description
window	Pointer to an OHNativeWindow instance.

OH_NativeWindow_CreateNativeWindow()

OHNativeWindow* OH_NativeWindow_CreateNativeWindow (void* pSurface)

Description

Creates an OHNativeWindow instance. A new OHNativeWindow instance is created each time this function is called. If this function is unavailable, you can create an OHNativeWindow instance by calling OH_NativeImage_AcquireNativeWindow or through the XComponent.

Deprecated from: 12

Substitute: No substitute is provided.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 8

Parameters

Name	Description
pSurface	Pointer to a ProduceSurface. The type is sptr<OHOS::Surface>.

Returns

Returns the pointer to the OHNativeWindow instance created.

OH_NativeWindow_CreateNativeWindowBufferFromNativeBuffer()

OHNativeWindowBuffer* OH_NativeWindow_CreateNativeWindowBufferFromNativeBuffer (OH_NativeBuffer* nativeBuffer)

Description

Creates an OHNativeWindowBuffer instance. A new OHNativeWindowBuffer instance is created each time this function is called.

This function must be used in pair with OH_NativeWindow_DestroyNativeWindowBuffer. Otherwise, memory leak occurs.

This function is not thread-safe.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 11

Parameters

Name	Description
nativeBuffer	Pointer to an OH_NativeBuffer instance.

Returns

Returns the pointer to the OHNativeWindowBuffer instance created.

OH_NativeWindow_CreateNativeWindowBufferFromSurfaceBuffer()

OHNativeWindowBuffer* OH_NativeWindow_CreateNativeWindowBufferFromSurfaceBuffer (void* pSurfaceBuffer)

Description

Creates an OHNativeWindowBuffer instance. A new OHNativeWindowBuffer instance is created each time this function is called.

Deprecated from: 12

Substitute: OH_NativeWindow_CreateNativeWindowBufferFromNativeBuffer

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 8

Parameters

Name	Description
pSurfaceBuffer	Pointer to a ProduceSurfaceBuffer. The type is sptr<OHOS::SurfaceBuffer>.

Returns

Returns the pointer to the OHNativeWindowBuffer instance created.

OH_NativeWindow_CreateNativeWindowFromSurfaceId()

int32_t OH_NativeWindow_CreateNativeWindowFromSurfaceId (uint64_t surfaceId, OHNativeWindow **window )

Description

Creates an OHNativeWindow instance based on a surface ID. This function must be used in pair with OH_NativeWindow_DestroyNativeWindow. Otherwise, memory leak occurs.

If OHNativeWindow needs to be released concurrently, call OH_NativeWindow_NativeObjectReference and OH_NativeWindow_NativeObjectUnreference to increase or decrease the reference count by 1 for OHNativeWindow.

The surface obtained by using the surface ID must be created in the current process, but not in a different process.

This function is not thread-safe.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 12

Parameters

Name	Description
surfaceId	Surface ID.
window	Double pointer to an OHNativeWindow instance.

Returns

Returns 0 if the operation is successful; returns an error code defined in OHNativeErrorCode otherwise.

OH_NativeWindow_DestroyNativeWindow()

void OH_NativeWindow_DestroyNativeWindow (OHNativeWindow* window)

Description

Decreases the reference count of an OHNativeWindow instance by 1 and when the reference count reaches 0, destroys the instance.

This function is not thread-safe.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 8

Parameters

Name	Description
window	Pointer to an OHNativeWindow instance.

OH_NativeWindow_DestroyNativeWindowBuffer()

void OH_NativeWindow_DestroyNativeWindowBuffer (OHNativeWindowBuffer* buffer)

Description

Decreases the reference count of an OHNativeWindowBuffer instance by 1 and when the reference count reaches 0, destroys the instance.

This function is not thread-safe.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 8

Parameters

Name	Description
buffer	Pointer to an OHNativeWindowBuffer instance.

OH_NativeWindow_GetBufferHandleFromNative()

BufferHandle* OH_NativeWindow_GetBufferHandleFromNative (OHNativeWindowBuffer* buffer)

Description

Obtains the pointer to a BufferHandle of an OHNativeWindowBuffer instance.

This function is not thread-safe.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 8

Parameters

Name	Description
buffer	Pointer to an OHNativeWindowBuffer instance.

Returns

Returns the pointer to the BufferHandle instance obtained.

OH_NativeWindow_GetLastFlushedBuffer()

int32_t OH_NativeWindow_GetLastFlushedBuffer (OHNativeWindow *window, OHNativeWindowBuffer **buffer, int *fenceFd, float matrix[16] )

Description

Obtains the OHNativeWindowBuffer that was flushed to the buffer queue last time through an OHNativeWindow instance.

Deprecated from: 12

Substitute: OH_NativeWindow_GetLastFlushedBufferV2

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 11

Parameters

Name	Description
window	Pointer to an OHNativeWindow instance.
buffer	Double pointer to an OHNativeWindowBuffer instance.
fenceFd	Pointer to a file descriptor.
matrix	Retrieved 4*4 transformation matrix.

Returns

Returns 0 if the operation is successful; returns an error code defined in OHNativeErrorCode otherwise.

OH_NativeWindow_GetNativeObjectMagic()

int32_t OH_NativeWindow_GetNativeObjectMagic (void *obj)

Description

Obtains the magic ID of a native object.

This function is not thread-safe.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 8

Parameters

Name	Description
obj	Pointer to an OHNativeWindow or OHNativeWindowBuffer instance.

Returns

Returns the magic ID, which is unique for each native object.

OH_NativeWindow_GetSurfaceId()

int32_t OH_NativeWindow_GetSurfaceId (OHNativeWindow *window, uint64_t *surfaceId )

Description

Obtains a surface ID through an OHNativeWindow.

This function is not thread-safe.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 12

Parameters

Name	Description
window	Pointer to an OHNativeWindow instance.
surfaceId	Pointer to the surface ID.

Returns

Returns 0 if the operation is successful; returns an error code defined in OHNativeErrorCode otherwise.

OH_NativeWindow_NativeObjectReference()

int32_t OH_NativeWindow_NativeObjectReference (void *obj)

Description

Adds the reference count of a native object.

This function must be used in pair with OH_NativeWindow_NativeObjectUnreference. Otherwise, memory leak occurs.

This function is not thread-safe.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 8

Parameters

Name	Description
obj	Pointer to an OHNativeWindow or OHNativeWindowBuffer instance.

Returns

Returns 0 if the operation is successful; returns an error code defined in OHNativeErrorCode otherwise.

OH_NativeWindow_NativeObjectUnreference()

int32_t OH_NativeWindow_NativeObjectUnreference (void *obj)

Description

Decreases the reference count of a native object and when the reference count reaches 0, destroys this object.

This function is not thread-safe.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 8

Parameters

Name	Description
obj	Pointer to an OHNativeWindow or OHNativeWindowBuffer instance.

Returns

Returns 0 if the operation is successful; returns an error code defined in OHNativeErrorCode otherwise.

OH_NativeWindow_NativeWindowAbortBuffer()

int32_t OH_NativeWindow_NativeWindowAbortBuffer (OHNativeWindow *window, OHNativeWindowBuffer *buffer )

Description

Returns the OHNativeWindowBuffer to the buffer queue through an OHNativeWindow instance, without filling in any content. The OHNativeWindowBuffer can be used for a new request.

This function is not thread-safe.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 8

Parameters

Name	Description
window	Pointer to an OHNativeWindow instance.
buffer	Pointer to an OHNativeWindowBuffer instance.

Returns

Returns 0 if the operation is successful; returns an error code defined in OHNativeErrorCode otherwise.

OH_NativeWindow_NativeWindowAttachBuffer()

int32_t OH_NativeWindow_NativeWindowAttachBuffer (OHNativeWindow *window, OHNativeWindowBuffer *buffer )

Description

Attaches an OHNativeWindowBuffer to an OHNativeWindow instance.

This function must be used in pair with OH_NativeWindow_NativeWindowDetachBuffer. Otherwise, memory management disorder may occur.

This function is not thread-safe.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 12

Parameters

Name	Description
window	Pointer to an OHNativeWindow instance.
buffer	Pointer to an OHNativeWindowBuffer instance.

Returns

Returns 0 if the operation is successful; returns an error code defined in OHNativeErrorCode otherwise.

OH_NativeWindow_NativeWindowDetachBuffer()

int32_t OH_NativeWindow_NativeWindowDetachBuffer (OHNativeWindow *window, OHNativeWindowBuffer *buffer )

Description

Detaches an OHNativeWindowBuffer from an OHNativeWindow instance.

This function is not thread-safe.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 12

Parameters

Name	Description
window	Pointer to an OHNativeWindow instance.
buffer	Pointer to an OHNativeWindowBuffer instance.

Returns

Returns 0 if the operation is successful; returns an error code defined in OHNativeErrorCode otherwise.

OH_NativeWindow_NativeWindowFlushBuffer()

int32_t OH_NativeWindow_NativeWindowFlushBuffer (OHNativeWindow *window, OHNativeWindowBuffer *buffer, int fenceFd, Region region )

Description

Flushes the OHNativeWindowBuffer filled with the produced content to the buffer queue through an OHNativeWindow instance for content consumption.

The system will close fenceFd. You do not need to close it.

This function is not thread-safe.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 8

Parameters

Name	Description
window	Pointer to an OHNativeWindow instance.
buffer	Pointer to an OHNativeWindowBuffer instance.
fenceFd	File descriptor handle, which is used for timing synchronization. The options are as follows: - -1: The CPU rendering is complete, and no timing synchronization is required. - ≥0: The handle is converted from a GPU synchronization object (for example, eglDupNativeFenceFDANDROID of EGL). The peer end needs to synchronize timing through fenceFd.
region	Region struct, which indicates a dirty region where content is updated.

Returns

Returns 0 if the operation is successful; returns an error code defined in OHNativeErrorCode otherwise.

OH_NativeWindow_NativeWindowHandleOpt()

int32_t OH_NativeWindow_NativeWindowHandleOpt (OHNativeWindow *window, int code,  ... )

Description

Sets or obtains the attributes of an OHNativeWindow instance, including the width, height, and content format.

This function is not thread-safe.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 8

Parameters

Name	Description
window	Pointer to an OHNativeWindow instance.
code	Operation code. For details, see NativeWindowOperation.
…	Variable argument, which must be the same as the data type corresponding to the operation code. The number of input parameters must be the same as that of the operation code. Otherwise, undefined behavior may occur.

Returns

Returns 0 if the operation is successful; returns an error code defined in OHNativeErrorCode otherwise.

OH_NativeWindow_NativeWindowRequestBuffer()

int32_t OH_NativeWindow_NativeWindowRequestBuffer (OHNativeWindow *window, OHNativeWindowBuffer **buffer, int *fenceFd )

Description

Requests an OHNativeWindowBuffer through an OHNativeWindow instance for content production.

Before calling this function, you must call SET_BUFFER_GEOMETRY to set the width and height of OHNativeWindow.

This function must be used in pair with OH_NativeWindow_NativeWindowFlushBuffer. Otherwise, memory leak occurs.

When fenceFd is used up, you must close it.

This function is not thread-safe.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 8

Parameters

Name	Description
window	Pointer to an OHNativeWindow instance.
buffer	Double pointer to an OHNativeWindowBuffer instance. You can obtain the BufferHandle struct by calling OH_NativeWindow_GetBufferHandleFromNative to access the buffer memory.
fenceFd	Pointer to a file descriptor, which is used for GPU/CPU synchronization. The options are as follows: - ≥0: The buffer is being used by the GPU. You need to wait until the file descriptor is ready. - -1: The buffer can be used directly.

Returns

Returns 0 if the operation is successful; returns an error code defined in OHNativeErrorCode otherwise.

OH_NativeWindow_NativeWindowSetMetaData()

int32_t OH_NativeWindow_NativeWindowSetMetaData (OHNativeWindow *window, uint32_t sequence, int32_t size, const OHHDRMetaData *metaData )

Description

Sets metadata for an OHNativeWindow.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 9

Deprecated: This function is deprecated since API version 10. No substitute is provided.

Parameters

Name	Description
window	Pointer to an OHNativeWindow instance.
sequence	Sequence of the producer buffer.
size	Size of the OHHDRMetaData array.
metaData	Pointer to the OHHDRMetaData array.

Returns

Returns 0 if the operation is successful; returns an error code defined in OHNativeErrorCode otherwise.

OH_NativeWindow_NativeWindowSetMetaDataSet()

int32_t OH_NativeWindow_NativeWindowSetMetaDataSet (OHNativeWindow *window, uint32_t sequence, OHHDRMetadataKey key, int32_t size, const uint8_t *metaData )

Description

Sets a metadata set for an OHNativeWindow.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 9

Deprecated: This function is deprecated since API version 10. No substitute is provided.

Parameters

Name	Description
window	Pointer to an OHNativeWindow instance.
sequence	Sequence of the producer buffer.
key	Metadata key. For details, see OHHDRMetadataKey.
size	Size of the uint8_t vector.
metaData	Pointer to the uint8_t vector.

Returns

Returns 0 if the operation is successful; returns an error code defined in OHNativeErrorCode otherwise.

OH_NativeWindow_NativeWindowSetScalingMode()

int32_t OH_NativeWindow_NativeWindowSetScalingMode (OHNativeWindow *window, uint32_t sequence, OHScalingMode scalingMode )

Description

Sets a scaling mode for an OHNativeWindow.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 9

Deprecated from: 10

Substitute: OH_NativeWindow_NativeWindowSetScalingModeV2

Parameters

Name	Description
window	Pointer to an OHNativeWindow instance.
sequence	Sequence of the producer buffer.
scalingMode	Scaling mode to set. For details, see OHScalingMode.

Returns

Returns 0 if the operation is successful; returns an error code defined in OHNativeErrorCode otherwise.

OH_NativeWindow_NativeWindowSetScalingModeV2()

int32_t OH_NativeWindow_NativeWindowSetScalingModeV2 (OHNativeWindow* window, OHScalingModeV2 scalingMode )

Description

Sets a rendering scaling mode for an OHNativeWindow instance.

This function is not thread-safe.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 12

Parameters

Name	Description
window	Pointer to an OHNativeWindow instance.
scalingMode	Scaling mode. For details about the available options, see OHScalingModeV2.

Returns

Returns 0 if the operation is successful; returns an error code defined in OHNativeErrorCode otherwise.

OH_NativeWindow_NativeWindowSetTunnelHandle()

int32_t OH_NativeWindow_NativeWindowSetTunnelHandle (OHNativeWindow *window, const OHExtDataHandle *handle )

Description

Sets a tunnel handle to an OHNativeWindow.

System capability: SystemCapability.Graphic.Graphic2D.NativeWindow

Since: 9

Deprecated: This function is deprecated since API version 10. No substitute is provided.

Parameters

Name	Description
window	Pointer to an OHNativeWindow instance.
handle	Pointer to an OHExtDataHandle.

Returns

Returns 0 if the operation is successful; returns an error code defined in OHNativeErrorCode otherwise.

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