基于ImageKit对图片进行处理

const context : Context = getContext(this); 
const filePath : string = context.cacheDir + '/test.jpg';
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const context = getContext(this); 
const filePath = context.cacheDir + '/test.jpg'; 
const file : fs.File = fs.openSync(filePath, fs.OpenMode.READ_WRITE); 
const fd : number = file?.fd;
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const context : Context = getContext(this); 
// 获取resourceManager资源管理器 
const resourceMgr : resourceManager.ResourceManager = context.resourceManager; 
resourceMgr.getRawFileContent('test.jpg').then((fileData : Uint8Array) => { 
  console.log("Succeeded in getting RawFileContent") 
  // 获取图片的ArrayBuffer 
  const buffer = fileData.buffer.slice(0); 
}).catch((err : BusinessError) => { 
  console.error("Failed to get RawFileContent") 
});
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const context : Context = getContext(this); 
// 获取resourceManager资源管理器 
const resourceMgr : resourceManager.ResourceManager = context.resourceManager; 
resourceMgr.getRawFd('test.jpg').then((rawFileDescriptor : resourceManager.RawFileDescriptor) => { 
  console.log("Succeeded in getting resourceManager") 
}).catch((err : BusinessError) => { 
  console.error("Failed to get resourceManager") 
});
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// path为已获得的沙箱路径 
const imageSource : image.ImageSource = image.createImageSource(filePath);
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// fd为已获得的文件描述符 
const imageSource : image.ImageSource = image.createImageSource(fd);
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const imageSource : image.ImageSource = image.createImageSource(buffer);
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const imageSource : image.ImageSource = image.createImageSource(rawFileDescriptor);
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let decodingOptions : image.DecodingOptions = { 
  editable: true, 
  desiredPixelFormat: 3, 
} 
// 创建pixelMap并进行简单的旋转和缩放 
imageSource.createPixelMap(decodingOptions).then((pixelMap : image.PixelMap) => { 
  // 顺时针旋转90° 
  pixelMap.rotate(90); 
 
  // 宽为原来的0.5 
  // 高为原来的0.5 
  pixelMap.scale(0.5, 0.5); 
  console.log("Succeeded in creating PixelMap") 
}).catch((err : BusinessError) => { 
  console.error("Failed to create PixelMap") 
});
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const imagePackerApi = image.createImagePacker();
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let packOpts : image.PackingOption = { format:"image/jpeg", quality:98 };
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import {BusinessError} from '@ohos.base' 
import fs from '@ohos.file.fs' 
const context : Context = getContext(this); 
const path : string = context.cacheDir + "/pixel_map.jpg"; 
let file = fs.openSync(path, fs.OpenMode.CREATE | fs.OpenMode.READ_WRITE); 
imagePackerApi.packToFile(pixelMap, file.fd, packOpts).then(() => { 
  // 直接打包进文件 
}).catch((error : BusinessError) => { 
  console.error('Failed to pack the image. And the error is: ' + error); 
})
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import {BusinessError} from '@ohos.base' 
import fs from '@ohos.file.fs' 
const context : Context = getContext(this); 
const filePath : string = context.cacheDir + "/image_source.jpg"; 
let file = fs.openSync(filePath, fs.OpenMode.CREATE | fs.OpenMode.READ_WRITE); 
imagePackerApi.packToFile(imageSource, file.fd, packOpts).then(() => { 
  // 直接打包进文件 
}).catch((error : BusinessError) => { 
  console.error('Failed to pack the image. And the error is: ' + error); 
})
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const path = getContext(this).filesDir + "imagenative.jpeg"; 
let file = fs.openSync(path, fs.OpenMode.READ_WRITE | fs.OpenMode.CREATE); 
let fd =file.fd 
testNapi.add1(this.pixelMap,fd)
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napi_value packer; 
int32_t result = OH_ImagePacker_Create(env, &packer); 
ImagePacker_Native* nativePacker = OH_ImagePacker_InitNative(env, packer);
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struct ImagePacker_Opts_ opts; 
// 配置编码格式（必须） 
opts.format = "image/jpeg"; 
// 配置编码质量（必须） 
opts.quality = 98;
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int32_t result = OH_ImagePacker_PackToFile(nativePacker, args[0], &opts, fd);
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