harmony 鸿蒙image_processing.h

2025-06-12
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image_processing.h

Overview

The image_processing.h file declares the image processing functions.

It provides capabilities such as Color Space Conversion (CSC), metadata generation, and image scaling.

Library: libimage_processing.so

File to include: <multimedia/video_processing_engine/image_processing.h>

System capability: SystemCapability.Multimedia.VideoProcessingEngine

Since: 13

Related module: ImageProcessing

Summary

Functions

Name	Description
ImageProcessing_ErrorCode OH_ImageProcessing_InitializeEnvironment (void)	Initializes the global environment of the image processing module.
ImageProcessing_ErrorCode OH_ImageProcessing_DeinitializeEnvironment (void)	Deinitializes the global environment of the image processing module.
bool OH_ImageProcessing_IsColorSpaceConversionSupported (const ImageProcessing_ColorSpaceInfo sourceImageInfo, const ImageProcessing_ColorSpaceInfo destinationImageInfo)	Checks whether CSC is supported for an image.
bool OH_ImageProcessing_IsCompositionSupported (const ImageProcessing_ColorSpaceInfo sourceImageInfo, const ImageProcessing_ColorSpaceInfo sourceGainmapInfo, const ImageProcessing_ColorSpaceInfo *destinationImageInfo)	Checks whether a dual-layer HDR image can be converted into a single-layer HDR image.
bool OH_ImageProcessing_IsDecompositionSupported (const ImageProcessing_ColorSpaceInfo sourceImageInfo, const ImageProcessing_ColorSpaceInfo destinationImageInfo, const ImageProcessing_ColorSpaceInfo *destinationGainmapInfo)	Checks whether a single-layer HDR image can be converted into a dual-layer HDR image.
bool OH_ImageProcessing_IsMetadataGenerationSupported (const ImageProcessing_ColorSpaceInfo *sourceImageInfo)	Checks whether metadata generation is supported for an image.
ImageProcessing_ErrorCode OH_ImageProcessing_Create (OH_ImageProcessing **imageProcessor, int32_t type)	Creates an image processing instance.
ImageProcessing_ErrorCode OH_ImageProcessing_Destroy (OH_ImageProcessing *imageProcessor)	Destroys an image processing instance.
ImageProcessing_ErrorCode OH_ImageProcessing_SetParameter (OH_ImageProcessing imageProcessor, const OH_AVFormat parameter)	Sets a parameter for the image processing module.
ImageProcessing_ErrorCode OH_ImageProcessing_GetParameter (OH_ImageProcessing imageProcessor, OH_AVFormat parameter)	Obtains a parameter of the image processing module.
ImageProcessing_ErrorCode OH_ImageProcessing_ConvertColorSpace (OH_ImageProcessing imageProcessor, OH_PixelmapNative sourceImage, OH_PixelmapNative *destinationImage)	Converts the color space for a single-layer image.
ImageProcessing_ErrorCode OH_ImageProcessing_Compose (OH_ImageProcessing imageProcessor, OH_PixelmapNative sourceImage, OH_PixelmapNative sourceGainmap, OH_PixelmapNative destinationImage)	Converts a dual-layer HDR image into a single-layer HDR image.
ImageProcessing_ErrorCode OH_ImageProcessing_Decompose (OH_ImageProcessing imageProcessor, OH_PixelmapNative sourceImage, OH_PixelmapNative destinationImage, OH_PixelmapNative destinationGainmap)	Converts a single-layer HDR image into a double-layer HDR image.
ImageProcessing_ErrorCode OH_ImageProcessing_GenerateMetadata (OH_ImageProcessing imageProcessor, OH_PixelmapNative sourceImage)	Generates metadata for an HDR image.
ImageProcessing_ErrorCode OH_ImageProcessing_EnhanceDetail (OH_ImageProcessing imageProcessor, OH_PixelmapNative sourceImage, OH_PixelmapNative *destinationImage)	Enhances the image definition and details.