1# external_window.h 2 3 4## Overview 5 6Defines the functions for obtaining and using a native window. 7 8**Since:** 98 10 11**Related Modules:** 12 13[NativeWindow](_native_window.md) 14 15 16## Summary 17 18 19### Structs 20 21| Name | Description | 22| -------- | -------- | 23| [Region](_region.md) | Defines the rectangle (dirty region) where the content is to be updated in the local native window. | 24| [Region::Rect](_rect.md) | Rectangular area. | 25| [OHHDRMetaData](_o_h_h_d_r_meta_data.md) | Defines the HDR metadata. | 26| [OHExtDataHandle](_o_h_ext_data_handle.md) | Defines the extended data handle. | 27 28 29### Types 30 31| Name | Description | 32| -------- | -------- | 33| [OHNativeWindow](_native_window.md) | Provides the function of accessing the **NativeWindow**. | 34| [OHNativeWindowBuffer](_native_window.md) | Provides the function of accessing the **NativeWindowBuffer**. | 35| [Region](_native_window.md) | Defines the rectangle (dirty region) where the content is to be updated in the local native window. | 36 37 38### Enums 39 40| Name | Description | 41| -------- | -------- | 42| [NativeWindowOperation](_native_window.md#nativewindowoperation) {<br/>[SET_BUFFER_GEOMETRY](_native_window.md), [GET_BUFFER_GEOMETRY](_native_window.md), [GET_FORMAT](_native_window.md), [SET_FORMAT](_native_window.md),<br/>[GET_USAGE](_native_window.md), [SET_USAGE](_native_window.md), [SET_STRIDE](_native_window.md), [GET_STRIDE](_native_window.md),<br/>[SET_SWAP_INTERVAL](_native_window.md), [GET_SWAP_INTERVAL](_native_window.md), [SET_TIMEOUT](_native_window.md), [GET_TIMEOUT](_native_window.md),<br/>[SET_COLOR_GAMUT](_native_window.md), [GET_COLOR_GAMUT](_native_window.md), [SET_TRANSFORM](_native_window.md), [GET_TRANSFORM](_native_window.md),<br/>[SET_UI_TIMESTAMP](_native_window.md)<br/>} | Enumerates the operation codes in the **OH_NativeWindow_NativeWindowHandleOpt** function. | 43| [OHScalingMode](_native_window.md#ohscalingmode) { [OH_SCALING_MODE_FREEZE](_native_window.md) = 0, [OH_SCALING_MODE_SCALE_TO_WINDOW](_native_window.md), [OH_SCALING_MODE_SCALE_CROP](_native_window.md), [OH_SCALING_MODE_NO_SCALE_CROP](_native_window.md) } | Enumerates the scaling modes. | 44| [OHHDRMetadataKey](_native_window.md#ohhdrmetadatakey) {<br/>[OH_METAKEY_RED_PRIMARY_X](_native_window.md) = 0, [OH_METAKEY_RED_PRIMARY_Y](_native_window.md) = 1, [OH_METAKEY_GREEN_PRIMARY_X](_native_window.md) = 2, [OH_METAKEY_GREEN_PRIMARY_Y](_native_window.md) = 3,<br/>[OH_METAKEY_BLUE_PRIMARY_X](_native_window.md) = 4, [OH_METAKEY_BLUE_PRIMARY_Y](_native_window.md) = 5, [OH_METAKEY_WHITE_PRIMARY_X](_native_window.md) = 6, [OH_METAKEY_WHITE_PRIMARY_Y](_native_window.md) = 7,<br/>[OH_METAKEY_MAX_LUMINANCE](_native_window.md) = 8, [OH_METAKEY_MIN_LUMINANCE](_native_window.md) = 9, [OH_METAKEY_MAX_CONTENT_LIGHT_LEVEL](_native_window.md) = 10, [OH_METAKEY_MAX_FRAME_AVERAGE_LIGHT_LEVEL](_native_window.md) = 11,<br/>[OH_METAKEY_HDR10_PLUS](_native_window.md) = 12, [OH_METAKEY_HDR_VIVID](_native_window.md) = 13<br/>} | Enumerates the HDR metadata keys. | 45 46 47### Functions 48 49| Name | Description | 50| -------- | -------- | 51| [OH_NativeWindow_CreateNativeWindow](_native_window.md#oh_nativewindow_createnativewindow) (void \*pSurface) | [OHNativeWindow](_native_window.md) \*<br/>Creates a **NativeWindow** instance. A new **NativeWindow** instance is created each time this function is called. | 52| [OH_NativeWindow_DestroyNativeWindow](_native_window.md#oh_nativewindow_destroynativewindow) ([OHNativeWindow](_native_window.md) \*window) | Decreases the reference count of a **NativeWindow** instance by 1 and when the reference count reaches 0, destroys the instance. | 53| [OH_NativeWindow_CreateNativeWindowBufferFromSurfaceBuffer](_native_window.md#oh_nativewindow_createnativewindowbufferfromsurfacebuffer) (void \*pSurfaceBuffer) | [OHNativeWindowBuffer](_native_window.md) \*<br/>Creates a **NativeWindowBuffer** instance. A new **NativeWindowBuffer** instance is created each time this function is called. | 54| [OH_NativeWindow_DestroyNativeWindowBuffer](_native_window.md#oh_nativewindow_destroynativewindowbuffer) ([OHNativeWindowBuffer](_native_window.md) \*buffer) | Decreases the reference count of a **NativeWindowBuffer** instance by 1 and when the reference count reaches 0, destroys the instance. | 55| [OH_NativeWindow_NativeWindowRequestBuffer](_native_window.md#oh_nativewindow_nativewindowrequestbuffer) ([OHNativeWindow](_native_window.md) \*window, [OHNativeWindowBuffer](_native_window.md) \*\*buffer, int \*fenceFd) | Requests a **NativeWindowBuffer** through a **NativeWindow** instance for content production. | 56| [OH_NativeWindow_NativeWindowFlushBuffer](_native_window.md#oh_nativewindow_nativewindowflushbuffer) ([OHNativeWindow](_native_window.md) \*window, [OHNativeWindowBuffer](_native_window.md) \*buffer, int fenceFd, [Region](_region.md) region) | Flushes the **NativeWindowBuffer** filled with the content to the buffer queue through a **NativeWindow** instance for content consumption. | 57| [OH_NativeWindow_NativeWindowAbortBuffer](_native_window.md#oh_nativewindow_nativewindowabortbuffer) ([OHNativeWindow](_native_window.md) \*window, [OHNativeWindowBuffer](_native_window.md) \*buffer) | Returns the **NativeWindowBuffer** to the buffer queue through a **NativeWindow** instance, without filling in any content. The **NativeWindowBuffer** can be used for another request. | 58| [OH_NativeWindow_NativeWindowHandleOpt](_native_window.md#oh_nativewindow_nativewindowhandleopt) ([OHNativeWindow](_native_window.md) \*window, int code,...) | Sets or obtains the attributes of a native window, including the width, height, and content format. | 59| [OH_NativeWindow_GetBufferHandleFromNative](_native_window.md#oh_nativewindow_getbufferhandlefromnative) ([OHNativeWindowBuffer](_native_window.md) \*buffer) | Obtains the pointer to a **BufferHandle** of a **NativeWindowBuffer** instance. | 60| [OH_NativeWindow_NativeObjectReference](_native_window.md#oh_nativewindow_nativeobjectreference) (void \*obj) | Adds the reference count of a native object. | 61| [OH_NativeWindow_NativeObjectUnreference](_native_window.md#oh_nativewindow_nativeobjectunreference) (void \*obj) | Decreases the reference count of a native object and when the reference count reaches 0, destroys this object. | 62| [OH_NativeWindow_GetNativeObjectMagic](_native_window.md#oh_nativewindow_getnativeobjectmagic) (void \*obj) | Obtains the magic ID of a native object. | 63| [OH_NativeWindow_NativeWindowSetScalingMode](_native_window.md#oh_nativewindow_nativewindowsetscalingmode) ([OHNativeWindow](_native_window.md) \*window, uint32_t sequence, [OHScalingMode](_native_window.md#ohscalingmode) scalingMode) | Sets the scaling mode for a native window. | 64| [OH_NativeWindow_NativeWindowSetMetaData](_native_window.md#oh_nativewindow_nativewindowsetmetadata) ([OHNativeWindow](_native_window.md) \*window, uint32_t sequence, int32_t size, const [OHHDRMetaData](_o_h_h_d_r_meta_data.md) \*metaData) | Sets the metadata for a native window. | 65| [OH_NativeWindow_NativeWindowSetMetaDataSet](_native_window.md#oh_nativewindow_nativewindowsetmetadataset) ([OHNativeWindow](_native_window.md) \*window, uint32_t sequence, [OHHDRMetadataKey](_native_window.md#ohhdrmetadatakey) key, int32_t size, const uint8_t \*metaData) | Sets the metadata set for a native window. | 66| [OH_NativeWindow_NativeWindowSetTunnelHandle](_native_window.md#oh_nativewindow_nativewindowsettunnelhandle) ([OHNativeWindow](_native_window.md) \*window, const [OHExtDataHandle](_o_h_ext_data_handle.md) \*handle) | Sets a tunnel handle for a native window. | 67