harmony 鸿蒙pixelmap_native.h

2025-06-12
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pixelmap_native.h

Overview

The pixelmap_native.h file declares the APIs for accessing a PixelMap.

Library: libpixelmap.so

File to include: <multimedia/image_framework/image/pixelmap_native.h>

System capability: SystemCapability.Multimedia.Image.Core

Since: 12

Related module: Image_NativeModule

Summary

Structs

Name	Description
struct OH_Pixelmap_HdrStaticMetadata	Describes the static metadata values available for the key HDR_STATIC_METADATA.
struct OH_Pixelmap_HdrDynamicMetadata	Describes the dynamic metadata values available for the key DR_DYNAMIC_METADATA.
struct OH_Pixelmap_HdrGainmapMetadata	Describes the gain map metadata values available for the key HDR_GAINMAP_METADATA. For details, see ISO 21496-1.
struct OH_Pixelmap_HdrMetadataValue	Describes the HDR metadata values used by the PixelMap and available for the key OH_Pixelmap_HdrMetadataKey.

Types

Name	Description
typedef struct OH_PixelmapNative OH_PixelmapNative	Defines a struct for the PixelMap, which is used to perform operations related to a PixelMap.
typedef struct OH_NativeBuffer OH_NativeBuffer	Defines a struct for the native buffer, which is used to perform operations related to the native buffer.
typedef struct OH_NativeColorSpaceManager OH_NativeColorSpaceManager	Defines a struct for the native color space manager, which is used to perform operations related to the native color space manager.
typedef struct OH_Pixelmap_HdrStaticMetadata OH_Pixelmap_HdrStaticMetadata	Defines a struct for the static metadata values available for the key HDR_STATIC_METADATA.
typedef struct OH_Pixelmap_HdrDynamicMetadata OH_Pixelmap_HdrDynamicMetadata	Defines a struct for the dynamic metadata values available for the key DR_DYNAMIC_METADATA.
typedef struct OH_Pixelmap_HdrGainmapMetadata OH_Pixelmap_HdrGainmapMetadata	Defines a struct for the gain map metadata values available for the key HDR_GAINMAP_METADATA. For details, see ISO 21496-1.
typedef struct OH_Pixelmap_HdrMetadataValue OH_Pixelmap_HdrMetadataValue	Defines a struct for the HDR metadata values used by the PixelMap and available for the key OH_Pixelmap_HdrMetadataKey.
typedef struct OH_Pixelmap_InitializationOptions OH_Pixelmap_InitializationOptions	Defines a struct for the initialization parameters.
typedef struct OH_Pixelmap_ImageInfo OH_Pixelmap_ImageInfo	Defines a struct for the image information.

Enums

Name	Description
PIXELMAP_ALPHA_TYPE { PIXELMAP_ALPHA_TYPE_UNKNOWN = 0, PIXELMAP_ALPHA_TYPE_OPAQUE = 1, PIXELMAP_ALPHA_TYPE_PREMULTIPLIED = 2, PIXELMAP_ALPHA_TYPE_UNPREMULTIPLIED = 3 }	Enumerates the alpha types of a PixelMap.
PIXEL_FORMAT { PIXEL_FORMAT_UNKNOWN = 0, PIXEL_FORMAT_ARGB_8888 = 1, PIXEL_FORMAT_RGB_565 = 2, PIXEL_FORMAT_RGBA_8888 = 3, PIXEL_FORMAT_BGRA_8888 = 4, PIXEL_FORMAT_RGB_888 = 5, PIXEL_FORMAT_ALPHA_8 = 6, PIXEL_FORMAT_RGBA_F16 = 7, PIXEL_FORMAT_NV21 = 8, PIXEL_FORMAT_NV12 = 9, PIXEL_FORMAT_RGBA_1010102 = 10, PIXEL_FORMAT_YCBCR_P010 = 11, PIXEL_FORMAT_YCRCB_P010 = 12 }	Enumerates the image pixel formats.
OH_PixelmapNative_AntiAliasingLevel { OH_PixelmapNative_AntiAliasing_NONE = 0, OH_PixelmapNative_AntiAliasing_LOW = 1, OH_PixelmapNative_AntiAliasing_MEDIUM = 2, OH_PixelmapNative_AntiAliasing_HIGH = 3 }	Enumerates the antialiasing levels used for scaling PixelMaps.
OH_Pixelmap_HdrMetadataKey { HDR_METADATA_TYPE = 0, HDR_STATIC_METADATA = 1, HDR_DYNAMIC_METADATA = 2, HDR_GAINMAP_METADATA = 3 }	Enumerates the keys of the HDR related metadata information used by the PixelMap. It is used in OH_PixelmapNative_SetMetadata and OH_PixelmapNative_GetMetadata.
OH_Pixelmap_HdrMetadataType { HDR_METADATA_TYPE_NONE = 0, HDR_METADATA_TYPE_BASE = 1, HDR_METADATA_TYPE_GAINMAP = 2, HDR_METADATA_TYPE_ALTERNATE = 3 }	Enumerates the HDR metadata types, which are the values of HDR_METADATA_TYPE.

Functions

Name	Description
Image_ErrorCode OH_PixelmapInitializationOptions_Create (OH_Pixelmap_InitializationOptions **options)	Creates the pointer to an OH_Pixelmap_InitializationOptions struct.
Image_ErrorCode OH_PixelmapInitializationOptions_GetWidth (OH_Pixelmap_InitializationOptions options, uint32_t width)	Obtains the image width.
Image_ErrorCode OH_PixelmapInitializationOptions_SetWidth (OH_Pixelmap_InitializationOptions *options, uint32_t width)	Sets the image width.
Image_ErrorCode OH_PixelmapInitializationOptions_GetHeight (OH_Pixelmap_InitializationOptions options, uint32_t height)	Obtains the image height.
Image_ErrorCode OH_PixelmapInitializationOptions_SetHeight (OH_Pixelmap_InitializationOptions *options, uint32_t height)	Sets the image height.
Image_ErrorCode OH_PixelmapInitializationOptions_GetPixelFormat (OH_Pixelmap_InitializationOptions options, int32_t pixelFormat)	Obtains the pixel format.
Image_ErrorCode OH_PixelmapInitializationOptions_SetPixelFormat (OH_Pixelmap_InitializationOptions *options, int32_t pixelFormat)	Sets the pixel format.
Image_ErrorCode OH_PixelmapInitializationOptions_GetSrcPixelFormat (OH_Pixelmap_InitializationOptions options, int32_t srcpixelFormat)	Obtains the source pixel format.
Image_ErrorCode OH_PixelmapInitializationOptions_SetSrcPixelFormat (OH_Pixelmap_InitializationOptions *options, int32_t srcpixelFormat)	Sets the source pixel format.
Image_ErrorCode OH_PixelmapInitializationOptions_GetRowStride (OH_Pixelmap_InitializationOptions options, int32_t rowStride)	Obtains the row stride. The stride is the actual memory size occupied by each row of the image, in bytes. Stride = Width *Number of bytes per pixel + Padding, where padding refers to the extra space added at the end of each row for memory alignment purposes.
Image_ErrorCode OH_PixelmapInitializationOptions_SetRowStride (OH_Pixelmap_InitializationOptions *options, int32_t rowStride)	Sets the row stride. The stride is the actual memory size occupied by each row of the image, in bytes. Stride = Width *Number of bytes per pixel + Padding, where padding refers to the extra space added at the end of each row for memory alignment purposes.
Image_ErrorCode OH_PixelmapInitializationOptions_GetAlphaType (OH_Pixelmap_InitializationOptions options, int32_t alphaType)	Obtains the alpha type.
Image_ErrorCode OH_PixelmapInitializationOptions_SetAlphaType (OH_Pixelmap_InitializationOptions *options, int32_t alphaType)	Sets the alpha type.
Image_ErrorCode OH_PixelmapInitializationOptions_GetEditable (OH_Pixelmap_InitializationOptions options, bool editable)	Obtains the editable flag.
Image_ErrorCode OH_PixelmapInitializationOptions_SetEditable (OH_Pixelmap_InitializationOptions *options, bool editable)	Sets the editable flag.
Image_ErrorCode OH_PixelmapInitializationOptions_Release (OH_Pixelmap_InitializationOptions *options)	Releases the pointer to an OH_Pixelmap_InitializationOptions struct.
Image_ErrorCode OH_PixelmapImageInfo_Create (OH_Pixelmap_ImageInfo **info)	Creates the pointer to an OH_Pixelmap_ImageInfo struct.
Image_ErrorCode OH_PixelmapImageInfo_GetWidth (OH_Pixelmap_ImageInfo info, uint32_t width)	Obtains the image width.
Image_ErrorCode OH_PixelmapImageInfo_GetHeight (OH_Pixelmap_ImageInfo info, uint32_t height)	Obtains the image height.
Image_ErrorCode OH_PixelmapImageInfo_GetRowStride (OH_Pixelmap_ImageInfo info, uint32_t rowStride)	Obtains the row stride.
Image_ErrorCode OH_PixelmapImageInfo_GetPixelFormat (OH_Pixelmap_ImageInfo info, int32_t pixelFormat)	Obtains the pixel format.
Image_ErrorCode OH_PixelmapImageInfo_GetAlphaType (OH_Pixelmap_ImageInfo info, int32_t alphaType)	Obtains the alpha type.
Image_ErrorCode OH_PixelmapImageInfo_GetDynamicRange (OH_Pixelmap_ImageInfo info, bool isHdr)	Obtains the dynamic range of a PixelMap.
Image_ErrorCode OH_PixelmapImageInfo_Release (OH_Pixelmap_ImageInfo *info)	Releases the pointer to an OH_Pixelmap_ImageInfo struct.
Image_ErrorCode OH_PixelmapNative_CreatePixelmap (uint8_t data, size_t dataLength, OH_Pixelmap_InitializationOptions options, OH_PixelmapNative **pixelmap)	Creates a PixelMap based on properties. By default, the BGRA_8888 format is used for data processing.
Image_ErrorCode OH_PixelmapNative_ConvertPixelmapNativeToNapi (napi_env env, OH_PixelmapNative pixelmapNative, napi_value pixelmapNapi)	Converts a nativePixelMap object to a PixelMapnapi object.
Image_ErrorCode OH_PixelmapNative_ConvertPixelmapNativeFromNapi (napi_env env, napi_value pixelmapNapi, OH_PixelmapNative **pixelmapNative)	Converts a PixelMapnapi object to a nativePixelMap object.
Image_ErrorCode OH_PixelmapNative_ReadPixels (OH_PixelmapNative pixelmap, uint8_t destination, size_t *bufferSize)	Reads the pixels of a PixelMap and writes the result to an ArrayBuffer.
Image_ErrorCode OH_PixelmapNative_WritePixels (OH_PixelmapNative pixelmap, uint8_t source, size_t bufferSize)	Reads the pixels in the buffer and writes the result to a PixelMap.
Image_ErrorCode OH_PixelmapNative_GetArgbPixels (OH_PixelmapNative pixelmap, uint8_t destination, size_t *bufferSize)	Reads data in ARGB format from a PixelMap.
Image_ErrorCode OH_PixelmapNative_ToSdr (OH_PixelmapNative *pixelmap)	Converts a PixelMap from the HDR format to the SDR format.
Image_ErrorCode OH_PixelmapNative_GetImageInfo (OH_PixelmapNative pixelmap, OH_Pixelmap_ImageInfo imageInfo)	Obtains the image information of a PixelMap.
Image_ErrorCode OH_PixelmapNative_Opacity (OH_PixelmapNative *pixelmap, float rate)	Sets the opacity rate to enable the PixelMap to achieve the corresponding opacity effect.
Image_ErrorCode OH_PixelmapNative_Scale (OH_PixelmapNative *pixelmap, float scaleX, float scaleY)	Scales a PixelMap based on a given width and height.
Image_ErrorCode OH_PixelmapNative_ScaleWithAntiAliasing (OH_PixelmapNative *pixelmap, float scaleX, float scaleY, OH_PixelmapNative_AntiAliasingLevel level)	Scales a PixelMap based on the specified antialiasing level, width, and height.
Image_ErrorCode OH_PixelmapNative_CreateScaledPixelMap (OH_PixelmapNative srcPixelmap, OH_PixelmapNative *dstPixelmap, float scaleX, float scaleY)	Creates a PixelMap that has been resized based on the specified scale factors of the width and height.
Image_ErrorCode OH_PixelmapNative_CreateScaledPixelMapWithAntiAliasing (OH_PixelmapNative srcPixelmap, OH_PixelmapNative *dstPixelmap, float scaleX, float scaleY, OH_PixelmapNative_AntiAliasingLevel level)	Creates a PixelMap that has been resized based on the specified antialiasing level and the scale factors of the width and height.
Image_ErrorCode OH_PixelmapNative_Translate (OH_PixelmapNative *pixelmap, float x, float y)	Translates a PixelMap based on given coordinates.
Image_ErrorCode OH_PixelmapNative_Rotate (OH_PixelmapNative *pixelmap, float angle)	Rotates a PixelMap based on a given angle.
Image_ErrorCode OH_PixelmapNative_Flip (OH_PixelmapNative *pixelmap, bool shouldFilpHorizontally, bool shouldFilpVertically)	Flips a PixelMap based on a given angle.
Image_ErrorCode OH_PixelmapNative_Crop (OH_PixelmapNative pixelmap, Image_Region region)	Crops a PixelMap based on a given size.
Image_ErrorCode OH_PixelmapNative_Release (OH_PixelmapNative *pixelmap)	Releases the pointer to an OH_PixelmapNative object. OH_PixelmapNative_Destroy is recommended.
Image_ErrorCode OH_PixelmapNative_Destroy (OH_PixelmapNative **pixelmap)	Releases the pointer to an OH_PixelmapNative object.
Image_ErrorCode OH_PixelmapNative_ConvertAlphaFormat (OH_PixelmapNative srcpixelmap, OH_PixelmapNative dstpixelmap, const bool isPremul)	Converts pixel data of a PixelMap from premultiplied alpha to non-premultiplied alpha, or vice versa.
Image_ErrorCode OH_PixelmapNative_CreateEmptyPixelmap (OH_Pixelmap_InitializationOptions options, OH_PixelmapNative *pixelmap)	Creates an empty PixelMap using OH_Pixelmap_InitializationOptions. The memory data is 0.
Image_ErrorCode OH_PixelmapNative_GetNativeBuffer (OH_PixelmapNative pixelmap, OH_NativeBuffer *nativeBuffer)	Obtains the NativeBuffer object from a PixelMap in the DMA memory.
Image_ErrorCode OH_PixelmapNative_GetMetadata (OH_PixelmapNative pixelmap, OH_Pixelmap_HdrMetadataKey key, OH_Pixelmap_HdrMetadataValue *value)	Obtains the metadata.
Image_ErrorCode OH_PixelmapNative_SetMetadata (OH_PixelmapNative pixelmap, OH_Pixelmap_HdrMetadataKey key, OH_Pixelmap_HdrMetadataValue value)	Sets the metadata.
Image_ErrorCode OH_PixelmapNative_SetColorSpaceNative (OH_PixelmapNative pixelmap, OH_NativeColorSpaceManager colorSpaceNative)	Sets a NativeColorSpaceManager object.
Image_ErrorCode OH_PixelmapNative_GetColorSpaceNative (OH_PixelmapNative pixelmap, OH_NativeColorSpaceManager *colorSpaceNative)	Obtains a NativeColorSpaceManager object.
Image_ErrorCode OH_PixelmapNative_SetMemoryName (OH_PixelmapNative pixelmap, char name, size_t *size)	Sets the memory name of a PixelMap.
Image_ErrorCode OH_PixelmapNative_GetByteCount (OH_PixelmapNative pixelmap, uint32_t byteCount)	Obtains the total number of bytes occupied by all pixels in a PixelMap, excluding any memory padding.
Image_ErrorCode OH_PixelmapNative_GetAllocationByteCount (OH_PixelmapNative pixelmap, uint32_t allocationByteCount)	Obtains the number of bytes in the memory allocated by a PixelMap to store pixels.
Image_ErrorCode OH_PixelmapNative_AccessPixels (OH_PixelmapNative pixelmap, void *addr)	Obtains the memory address where the pixels of a PixelMap are stored and locks the memory. When the memory is locked, any attempts to alter or free the pixel data of the PixelMap will fail or be ineffective.
Image_ErrorCode OH_PixelmapNative_UnaccessPixels (OH_PixelmapNative *pixelmap)	Unlocks the memory allocated to store the pixels of a PixelMap. This function must be used together with OH_PixelmapNative_AccessPixels.