!405 ImageKnife降采样适配3.x

Merge pull request !405 from 田双明/master

CHANGELOG.md

@@ -1,7 +1,7 @@
-
+## 3.1.1-rc.1
+- Photo reduction sampling
 ## 3.1.1-rc.0
 - 重构代码：抽取ImageKnifeDispatcher子线程requestJob相关代码到ImageKnifeLoader中，降低函数复杂度
-
 ## 3.1.0
 - 部分静态webp图片有delay属性导致识别成动图,改用getFrameCount识别
 - 修复加载错误图后未去请求排队队列中的请求

README.md

@@ -264,6 +264,17 @@ ImageKnifeAnimatorComponent({
         }),animatorOption:this.animatorOption
       }).width(300).height(300).backgroundColor(Color.Orange).margin({top:30})
 ```
+#### 11.图片降采样 示例
+```
+ImageKnifeComponent({
+        imageKnifeOption:new ImageKnifeOption({
+          loadSrc:$r("app.media.pngSample"),
+          placeholderSrc:$r('app.media.loading'),
+          errorholderSrc:$r('app.media.failed'),
+          downsampleOf: DownsampleStrategy.NONE
+        }),animatorOption:this.animatorOption
+      }).width(300).height(300)
+```
 #### Reuse Scenario
 Clear the component content in the **aboutToRecycle** lifecycle and trigger image loading through watch observeration.
 ## Available APIs
@@ -308,7 +319,17 @@ Clear the component content in the **aboutToRecycle** lifecycle and trigger imag
 | drawingColorFilter    | ColorFilter                                           | Drawing color filter. Optional.            |
 | onComplete            | (event:EventImage \| undefined)=>void              | Callback for image loading completion. Optional. |
 | onLoadListener        | onLoadStart:()=>void,onLoadSuccess:(data:string\|Pixelmap)=>void                       | Callback for image loading events. Optional. |
-
+| downsampleOf          | DownsampleStrategy                                    | 降采样(可选)                  |
+### 降采样类型
+| 类型                  | 相关描述              |
+|---------------------|-------------------|
+| NONE                | 不进行降采样            |
+| AT_MOST             | 请求尺寸大于实际尺寸不进行放大   |
+| FIT_CENTER_MEMORY          | 两边自适应内存优先             |
+| FIT_CENTER_QUALITY          | 两边自适应质量优先             |
+| CENTER_OUTSIDE_MEMORY       | 宽高缩放比最大的比例，进行缩放适配内存优先 |
+| CENTER_OUTSIDE_QUALITY       | 宽高缩放比最大的比例，进行缩放适配质量优先 |
+| AT_LEAST      | 根据宽高的最小的比例，进行适配   |
 ### ImageKnife
 
 | Parameter         | Type                                                    | Description                  |

entry/src/main/ets/common/CustomEngineKeyImpl.ets

@@ -12,6 +12,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+ import { DownsampleStrategy } from '@ohos/imageknife';
 import { IEngineKey, ImageKnifeOption, PixelMapTransformation,SparkMD5 ,ImageKnifeRequestSource} from '@ohos/libraryimageknife';
 
 //全局自定义key demo
@@ -35,6 +36,9 @@ export class CustomEngineKeyImpl implements IEngineKey {
       if (imageKnifeOption.transformation) {
         key += "transformation=" + this.getTransformation(imageKnifeOption.transformation) + ";"
       }
+        if ((imageKnifeOption.downsampleOf !== DownsampleStrategy.NONE && imageKnifeOption.downsampleOf !== undefined)) {
+        key += "downsampleOf" + imageKnifeOption.downsampleOf +"width="+width+"height="+ height
+      }
     }
     return key
   }

entry/src/main/ets/pages/DownSamplePage.ets

@@ -0,0 +1,214 @@
+/*
+ * Copyright (C) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the 'License');
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an 'AS IS' BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import { DownsampleStrategy, ImageKnifeOption, } from '@ohos/imageknife';
+import { ImageKnifeComponent } from '@ohos/libraryimageknife';
+import { image } from '@kit.ImageKit';
+import { BusinessError } from '@kit.BasicServicesKit';
+import { Downsampler } from '@ohos/imageknife/src/main/ets/downsampling/Downsampler';
+import { FileTypeUtil } from '@ohos/imageknife/src/main/ets/utils/FileTypeUtil';
+
+@Entry
+@ComponentV2
+struct DownSamplePage {
+  @Local imageKnifeOption: ImageKnifeOption = new ImageKnifeOption({
+    loadSrc: $r('app.media.startIcon'),
+    placeholderSrc: $r("app.media.loading"),
+    errorholderSrc: $r("app.media.app_icon"),
+    objectFit: ImageFit.Contain
+  })
+  isBrightness: boolean = false
+  @Local beforeSampling: number = 0
+  @Local afterSampling: number = 0
+  @Local SamplingList: SamplingType[] = [
+
+    new SamplingType(7, "AT_LEAST"),
+    new SamplingType(1, "AT_MOST"),
+
+    new SamplingType(2, "FIT_CENTER_MEMORY"),
+    new SamplingType(4, "FIT_CENTER_QUALITY"),
+    new SamplingType(5, "CENTER_OUTSIDE_MEMORY"),
+    new SamplingType(6, "CENTER_OUTSIDE_QUALITY"),
+    new SamplingType(0, "NONE"),
+
+  ]
+  @Local checked: boolean = false
+
+  updateImageKnifeOption(value: string) {
+    if (value === 'NONE') {
+      this.imageKnifeOption = new ImageKnifeOption({
+        loadSrc: $r('app.media.pngSample'),
+        placeholderSrc: $r("app.media.loading"),
+        errorholderSrc: $r("app.media.app_icon"),
+        objectFit: ImageFit.Contain,
+        downsampleOf: DownsampleStrategy.NONE
+      })
+      this.originalPixMap($r('app.media.pngSample'))
+      this.afterSamplingFunc($r('app.media.pngSample'))
+    } else if (value === 'AT_MOST') {
+      this.imageKnifeOption = new ImageKnifeOption({
+        loadSrc: $r('app.media.pngSample'),
+        placeholderSrc: $r("app.media.loading"),
+        errorholderSrc: $r("app.media.app_icon"),
+        objectFit: ImageFit.Contain,
+        downsampleOf: DownsampleStrategy.AT_MOST
+      })
+      this.originalPixMap($r('app.media.pngSample'))
+      this.afterSamplingFunc($r('app.media.pngSample'))
+    } else if (value === 'FIT_CENTER_MEMORY') {
+      this.imageKnifeOption = new ImageKnifeOption({
+        loadSrc: $r('app.media.pngSample'),
+        placeholderSrc: $r("app.media.loading"),
+        errorholderSrc: $r("app.media.app_icon"),
+        objectFit: ImageFit.Contain,
+        downsampleOf: DownsampleStrategy.FIT_CENTER_MEMORY
+      })
+      this.originalPixMap($r('app.media.pngSample'))
+      this.afterSamplingFunc($r('app.media.pngSample'))
+    } else if (value === 'FIT_CENTER_QUALITY') {
+      this.imageKnifeOption = new ImageKnifeOption({
+        loadSrc: $r('app.media.pngSample'),
+        placeholderSrc: $r("app.media.loading"),
+        errorholderSrc: $r("app.media.app_icon"),
+        objectFit: ImageFit.Contain,
+        downsampleOf: DownsampleStrategy.FIT_CENTER_QUALITY
+      })
+      this.originalPixMap($r('app.media.pngSample'))
+      this.afterSamplingFunc($r('app.media.pngSample'))
+    } else if (value === 'CENTER_OUTSIDE_MEMORY') {
+      this.imageKnifeOption = new ImageKnifeOption({
+        loadSrc: $r('app.media.pngSample'),
+        placeholderSrc: $r("app.media.loading"),
+        errorholderSrc: $r("app.media.app_icon"),
+        objectFit: ImageFit.Contain,
+        downsampleOf: DownsampleStrategy.CENTER_OUTSIDE_MEMORY
+      })
+      this.originalPixMap($r('app.media.pngSample'))
+      this.afterSamplingFunc($r('app.media.pngSample'))
+    } else if (value === 'CENTER_OUTSIDE_QUALITY') {
+      this.imageKnifeOption = new ImageKnifeOption({
+        loadSrc: $r('app.media.pngSample'),
+        placeholderSrc: $r("app.media.loading"),
+        errorholderSrc: $r("app.media.app_icon"),
+        objectFit: ImageFit.Contain,
+        downsampleOf: DownsampleStrategy.CENTER_OUTSIDE_QUALITY
+      })
+      this.originalPixMap($r('app.media.pngSample'))
+      this.afterSamplingFunc($r('app.media.pngSample'))
+    } else {
+      this.imageKnifeOption = new ImageKnifeOption({
+        loadSrc: $r('app.media.pngSample'),
+        placeholderSrc: $r("app.media.loading"),
+        errorholderSrc: $r("app.media.app_icon"),
+        objectFit: ImageFit.Contain,
+        downsampleOf: DownsampleStrategy.AT_LEAST
+      })
+      this.originalPixMap($r('app.media.pngSample'))
+      this.afterSamplingFunc($r('app.media.pngSample'))
+    }
+  }
+
+  async afterSamplingFunc(imgs: Resource) {
+    let img: Uint8Array = await getContext(this).resourceManager.getMediaContent(imgs);
+    let imageSource: image.ImageSource = image.createImageSource(img.buffer.slice(0));
+    let fileTypeUtil = new FileTypeUtil();
+    let typeValue = fileTypeUtil.getFileType(img.buffer.slice(0)) as string;
+    let decodingOptions: image.DecodingOptions = {
+      editable: true,
+      desiredPixelFormat: 3,
+    }
+    let imageInfo = await imageSource.getImageInfo()
+
+    if (this.imageKnifeOption.downsampleOf !== DownsampleStrategy.NONE){
+      let reqSize =
+        new Downsampler().calculateScaling(typeValue, imageInfo.size.width, imageInfo.size.height, 300,
+          300, this.imageKnifeOption.downsampleOf)
+      decodingOptions = {
+        editable: true,
+        desiredSize: {
+          width: reqSize.width,
+          height: reqSize.height
+        }
+      }
+    }
+
+    // 创建pixelMap
+    imageSource.createPixelMap(decodingOptions).then((pixelMap: image.PixelMap) => {
+      this.afterSampling = pixelMap.getPixelBytesNumber()
+    }).catch((err: BusinessError) => {
+      console.error("Failed to create PixelMap")
+    });
+  }
+
+  async originalPixMap(imgs: Resource,) {
+    let img: Uint8Array = await getContext(this).resourceManager.getMediaContent(imgs);
+    let imageSource: image.ImageSource = image.createImageSource(img.buffer.slice(0));
+    let decodingOptions: image.DecodingOptions = {
+      editable: true,
+      desiredPixelFormat: 3,
+    }
+    // 创建pixelMap
+    imageSource.createPixelMap(decodingOptions).then((pixelMap: image.PixelMap) => {
+      this.beforeSampling = pixelMap.getPixelBytesNumber()
+    }).catch((err: BusinessError) => {
+      console.error("Failed to create PixelMap")
+    });
+  }
+  getResourceString(res:Resource){
+    return getContext().resourceManager.getStringSync(res.id)
+  }
+  build() {
+    Scroll() {
+      Column() {
+        ForEach(this.SamplingList, (item: SamplingType, index) => {
+          Flex({ justifyContent: FlexAlign.Center, alignItems: ItemAlign.Center }) {
+            Radio({ value: item.value + 'radio', group: 'radioGroup' })
+              .height(50)
+              .width(50)
+              .checked(this.checked)
+              .onClick(() => {
+                this.updateImageKnifeOption(item.value)
+              })
+            Text(this.getResourceString($r('app.string.Sampling_pecification'))+ item.value).fontSize(20)
+          }
+        }, (item: SamplingType) => JSON.stringify(item))
+        Column() {
+          Text(`${this.getResourceString($r('app.string.Unreal_samples'))}：${this.beforeSampling}`).fontSize(20)
+          Text(`${ this.getResourceString($r('app.string.After_the_sampling'))}：${this.afterSampling}`).fontSize(20)
+        }
+
+        ImageKnifeComponent({
+          imageKnifeOption: this.imageKnifeOption
+        })
+          .height(300)
+          .width(300)
+          .borderWidth(1)
+          .borderColor(Color.Pink)
+      }
+
+    }
+    .height('100%')
+    .width('100%')
+  }
+}
+
+class SamplingType {
+  key: number
+  value: string
+
+  constructor(key: number, value: string) {
+    this.key = key
+    this.value = value
+  }
+}

entry/src/main/ets/pages/Index.ets

@@ -17,154 +17,170 @@ import router from '@system.router';
 @Entry
 @ComponentV2
 struct Index {
-
+  getResourceString(res: Resource) {
-  getResourceString(res:Resource){
     return getContext().resourceManager.getStringSync(res.id)
   }
 
-
   aboutToAppear(): void {
 
   }
 
   build() {
-    Scroll(){
+    Scroll() {
       Column() {
-        Button($r('app.string.Test_ImageAnimator')).onClick(()=>{
+        Button($r('app.string.Test_ImageAnimator')).onClick(() => {
           router.push({
             uri: 'pages/ImageAnimatorPage',
           });
         })
-        Button($r('app.string.Test_multiple_images')).margin({top:10}).onClick(()=>{
+        Button($r('app.string.Test_multiple_images')).margin({ top: 10 }).onClick(() => {
           router.push({
             uri: 'pages/TestCommonImage',
           });
         })
-        Button($r('app.string.Test_Task_error')).margin({top:10}).onClick(()=>{
+        Button(this.getResourceString($r('app.string.Multiple_images')) + " + reuse + LazyForeach")
-          router.push({
+          .margin({ top: 10 })
-            uri: 'pages/TestTaskResourcePage',
+          .onClick(() => {
-          });
+            router.push({
-        })
+              uri: 'pages/UserPage',
-        Button($r('app.string.Test_HSP')).margin({top:10}).onClick(()=>{
-          router.push({
-            uri: 'pages/TestHspPreLoadImage',
 
-          });
+            });
-        })
+          })
-        Button($r('app.string.Test_SingleImage')).margin({top:10}).onClick(()=>{
+        Button($r('app.string.Test_SingleImage')).margin({ top: 10 }).onClick(() => {
           router.push({
             uri: 'pages/SingleImage',
 
           });
         })
-        Button($r('app.string.Test_custom_download')).margin({top:10}).onClick(()=>{
+        Button($r('app.string.Image_Downsampling_Functionality')).margin({top:10}).onClick(()=>{
           router.push({
-            uri: 'pages/TestSetCustomImagePage',
+            uri: 'pages/DownSamplePage',
-
           });
         })
-        Button(this.getResourceString($r('app.string.Multiple_images')) + " + LazyForEach").margin({top:10}).onClick(()=>{
+        Button($r('app.string.Display_long_image')).margin({ top: 10 }).onClick(() => {
-          router.push({
-            uri: 'pages/ManyPhotoShowPage',
-
-          });
-        })
-        Button(this.getResourceString($r('app.string.Multiple_images')) + " + reuse + LazyForeach").margin({top:10}).onClick(()=>{
-          router.push({
-            uri: 'pages/UserPage',
-
-          });
-        })
-        Button($r('app.string.Display_long_image')).margin({top:10}).onClick(()=>{
           router.push({
             uri: 'pages/LongImagePage',
 
           });
         })
-        Button($r('app.string.Image_scaling')).margin({top:10}).onClick(()=>{
+        Button($r('app.string.Image_Transformation')).margin({ top: 10 }).onClick(() => {
-          router.push({
-            uri: 'pages/TransformPage',
-
-          });
-        })
-        Button(this.getResourceString($r('app.string.Message_list')) + " + List").margin({top:10}).onClick(()=>{
-          router.push({
-            uri: 'pages/TestImageFlash',
-
-          });
-        })
-        Button($r('app.string.Custom_cache_key')).margin({top:10}).onClick(()=>{
-          router.push({
-            uri: 'pages/SignatureTestPage',
-
-          });
-        })
-        Button($r('app.string.Preloading_images_to_cache')).margin({top:10}).onClick(()=>{
-          router.push({
-            uri: 'pages/TestPrefetchToFileCache',
-
-          });
-        })
-        Button($r('app.string.Retrieve_image_display_from_cache')).margin({top:10}).onClick(()=>{
-          router.push({
-            uri: 'pages/TestIsUrlExist',
-
-          });
-        })
-        Button($r('app.string.Test_single_request_header')).margin({top:10}).onClick(()=>{
-          router.push({
-            uri: 'pages/TestHeader',
-
-          });
-        })
-        Button($r('app.string.Test_write_cache_strategy')).margin({top:10}).onClick(()=>{
-          router.push({
-            uri: 'pages/TestWriteCacheStage',
-
-          });
-        })
-        Button($r('app.string.Image_Transformation')).margin({top:10}).onClick(()=>{
           router.push({
             uri: 'pages/ImageTransformation',
 
           });
 
         })
+        Button($r('app.string.Test_media_URL')).margin({ top: 10 }).onClick(() => {
+          router.push({
+            uri: 'pages/dataShareUriLoadPage',
 
-        Button($r('app.string.Different_ObjectFit')).margin({top:10}).onClick(()=>{
+          });
+        })
+        Button($r('app.string.Different_ObjectFit')).margin({ top: 10 }).onClick(() => {
           router.push({
             uri: 'pages/ObjectFitPage',
 
           });
 
         })
+        Button($r('app.string.Custom_cache_key')).margin({ top: 10 }).onClick(() => {
+          router.push({
+            uri: 'pages/SignatureTestPage',
 
-        Button($r('app.string.Test_image_loading_success_or_failure_events')).margin({top:10}).onClick(()=>{
+          });
+        })
+        Button($r('app.string.Test_image_loading_success_or_failure_events')).margin({ top: 10 }).onClick(() => {
           router.push({
             uri: 'pages/LoadStatePage',
           })
         })
+        Button($r('app.string.Image_scaling')).margin({ top: 10 }).onClick(() => {
+          router.push({
+            uri: 'pages/TransformPage',
 
-        Button($r('app.string.Test_removing_image_cache_interface')).margin({top:10}).onClick(()=>{
+          });
+        })
+
+        Button($r('app.string.Test_HSP')).margin({ top: 10 }).onClick(() => {
+          router.push({
+            uri: 'pages/TestHspPreLoadImage',
+
+          });
+        })
+
+        Button($r('app.string.Test_custom_download')).margin({ top: 10 }).onClick(() => {
+          router.push({
+            uri: 'pages/TestSetCustomImagePage',
+
+          });
+        })
+
+        Button(this.getResourceString($r('app.string.Message_list')) + " + List").margin({ top: 10 }).onClick(() => {
+          router.push({
+            uri: 'pages/TestImageFlash',
+
+          });
+        })
+
+        Button($r('app.string.Preloading_images_to_cache')).margin({ top: 10 }).onClick(() => {
+          router.push({
+            uri: 'pages/TestPrefetchToFileCache',
+
+          });
+        })
+        Button($r('app.string.Retrieve_image_display_from_cache')).margin({ top: 10 }).onClick(() => {
+          router.push({
+            uri: 'pages/TestIsUrlExist',
+
+          });
+        })
+        Button($r('app.string.Test_single_request_header')).margin({ top: 10 }).onClick(() => {
+          router.push({
+            uri: 'pages/TestHeader',
+
+          });
+        })
+        Button($r('app.string.Test_write_cache_strategy')).margin({ top: 10 }).onClick(() => {
+          router.push({
+            uri: 'pages/TestWriteCacheStage',
+
+          });
+        })
+
+
+        Button($r('app.string.Test_removing_image_cache_interface')).margin({ top: 10 }).onClick(() => {
           router.push({
             uri: 'pages/TestRemoveCache',
           });
         })
-        Button($r('app.string.Test_error_image_display')).margin({top:10}).onClick(()=>{
+        Button($r('app.string.Test_error_image_display')).margin({ top: 10 }).onClick(() => {
           router.push({
             uri: 'pages/TestErrorHolderPage',
 
           });
         })
-        Button($r('app.string.Test_media_URL')).margin({top:10}).onClick(()=>{
+        Button($r('app.string.Test_Task_error')).margin({ top: 10 }).onClick(() => {
           router.push({
-            uri: 'pages/dataShareUriLoadPage',
+            uri: 'pages/TestTaskResourcePage',
-
+          });
+        })
+        Button($r('app.string.test_cache_btn')).margin({ top: 10 }).onClick(() => {
+          router.push({
+            uri: 'pages/TestCacheDataPage',
+          });
+        })
+        Button($r('app.string.test_change_color_btn')).margin({ top: 10 }).onClick(() => {
+          router.push({
+            uri: 'pages/TestChangeColorPage',
+          });
+        })
+        Button($r('app.string.test_cancel_callback_btn')).margin({ top: 10 }).onClick(() => {
+          router.push({
+            uri: 'pages/TestLoadCancelListenerPage',
           });
         })
-
       }
-    } .width('100%')
+    }.width('100%')
     .height('100%')
   }
 }

entry/src/main/ets/pages/LoadStatePage.ets

@@ -79,7 +79,9 @@ struct LoadStatePage {
           })
       }
       .margin({ top: 20 })
-      Text(this.typeValue)
+      Text($r('app.string.image_format',this.typeValue))
+      Text($r('app.string.image_width',this.currentWidth))
+      Text($r('app.string.image_height',this.currentHeight))
       ImageKnifeComponent({ imageKnifeOption: this.ImageKnifeOption }).height(this.currentHeight).width(this.currentWidth)
         .margin({ top: 20 })
       Button($r('app.string.Custom_download_failed')).onClick(()=>{

entry/src/main/ets/pages/TestCacheDataPage.ets

@@ -0,0 +1,140 @@
+/*
+ * Copyright (C) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the 'License');
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an 'AS IS' BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { ImageKnife, CacheStrategy, ImageKnifeComponent, ImageKnifeOption } from '@ohos/imageknife';
+
+@Entry
+@ComponentV2
+struct TestCacheDataPage {
+  @Local cacheUpLimit: number = 0;
+  @Local currentNum: number = 0;
+  @Local currentSize: number = 0;
+  @Local currentWidth: number = 200
+  @Local currentHeight: number = 200
+  @Local markersLimitText: string = getContext(this).resourceManager.getStringSync($r('app.string.memory'))
+  @Local markersNumText: string = getContext(this).resourceManager.getStringSync($r('app.string.memory'))
+  @Local markersSizeText: string = getContext(this).resourceManager.getStringSync($r('app.string.memory'))
+  @Local ImageKnifeOption: ImageKnifeOption = new ImageKnifeOption({
+    loadSrc: "",
+    objectFit: ImageFit.Contain,
+    onLoadListener: {
+      onLoadFailed: (err) => {
+        console.error("Load Failed Reason: " + err);
+      },
+      onLoadSuccess: (data) => {
+        return data;
+      },
+    },
+    border: { radius: 50 }
+  })
+
+  aboutToAppear(): void {
+    ImageKnife.getInstance().initFileCache(getContext(this), 256, 256 * 1024 * 1024, "ImageKnifeCache1")
+  }
+
+  build() {
+    Column() {
+
+      ImageKnifeComponent(
+        { imageKnifeOption: this.ImageKnifeOption })
+        .height(this.currentHeight)
+        .width(this.currentWidth)
+        .margin({ top: 10 })
+
+      Button($r('app.string.load_memory'))
+        .onClick(() => {
+          this.ImageKnifeOption = new ImageKnifeOption({
+            loadSrc: "https://contentcenter-drcn.dbankcdn.cn/pub_1/DevEcoSpace_1_900_9/3e/v3/LqRoLI-PRSu9Nqa8KdJ-pQ/dSqskBpSR9eraAMn7NBdqA.jpg",
+            objectFit: ImageFit.Contain,
+            writeCacheStrategy: CacheStrategy.Memory,
+            border: { radius: 50 },
+          })
+        })
+      Button($r('app.string.load_disk'))
+        .onClick(() => {
+          this.ImageKnifeOption = new ImageKnifeOption({
+            loadSrc: "https://contentcenter-drcn.dbankcdn.cn/pub_1/DevEcoSpace_1_900_9/56/v3/8MdhfSsCSMKj4sA6okUWrg/5uBx56tLTUO3RYQl-E5JiQ.jpg",
+            objectFit: ImageFit.Contain,
+            writeCacheStrategy: CacheStrategy.File,
+            border: { radius: 50 },
+          })
+        })
+      Text($r('app.string.cur_cache_limit', this.markersLimitText, this.cacheUpLimit))
+        .fontSize(20)
+        .margin({ bottom: 8 });
+      Text($r('app.string.cur_cache_image_num', this.markersNumText, this.currentNum))
+        .fontSize(20)
+        .margin({ bottom: 8 });
+      Text($r('app.string.cur_cache_size', this.markersSizeText, this.currentSize)).fontSize(20).margin({ bottom: 20 });
+
+      Button($r('app.string.get_cur_memory_limit')).onClick(() => {
+        let result = ImageKnife.getInstance().getCacheUpperLimit(CacheStrategy.Memory);
+        this.markersLimitText = getContext(this).resourceManager.getStringSync($r('app.string.memory'))
+        if (result) {
+          this.cacheUpLimit = result / (1024 * 1024);
+        } else {
+          this.cacheUpLimit = 0;
+        }
+      }).margin({ bottom: 8 });
+      Button($r('app.string.get_img_number_of_cache')).onClick(() => {
+        let result = ImageKnife.getInstance().getCurrentPicturesNum(CacheStrategy.Memory);
+        this.markersNumText = getContext(this).resourceManager.getStringSync($r('app.string.memory'))
+        if (result) {
+          this.currentNum = result;
+        } else {
+          this.currentNum = 0;
+        }
+      }).margin({ bottom: 8 });
+      Button($r('app.string.get_cur_memory_size')).onClick(() => {
+        let result = ImageKnife.getInstance().getCurrentCacheSize(CacheStrategy.Memory);
+        this.markersSizeText = getContext(this).resourceManager.getStringSync($r('app.string.memory'))
+        if (result) {
+          this.currentSize = result / (1024 * 1024);
+        } else {
+          this.currentSize = 0;
+        }
+      }).margin({ bottom: 8 });
+
+      Button($r('app.string.get_cur_disk_limit')).onClick(() => {
+        let result = ImageKnife.getInstance().getCacheUpperLimit(CacheStrategy.File);
+        this.markersLimitText = getContext(this).resourceManager.getStringSync($r('app.string.disk'))
+        if (result) {
+          this.cacheUpLimit = result / (1024 * 1024);
+        } else {
+          this.cacheUpLimit = 0;
+        }
+      }).margin({ bottom: 8 });
+      Button($r('app.string.get_img_number_of_disk')).onClick(() => {
+        let result = ImageKnife.getInstance().getCurrentPicturesNum(CacheStrategy.File);
+        this.markersNumText = getContext(this).resourceManager.getStringSync($r('app.string.disk'))
+        if (result) {
+          this.currentNum = result;
+        } else {
+          this.currentNum = 0;
+        }
+      }).margin({ bottom: 8 });
+      Button($r('app.string.get_cur_disk_size')).onClick(() => {
+        let result = ImageKnife.getInstance().getCurrentCacheSize(CacheStrategy.File);
+        this.markersSizeText = getContext(this).resourceManager.getStringSync($r('app.string.disk'))
+        if (result) {
+          this.currentSize = result / (1024 * 1024);
+        } else {
+          this.currentSize = 0;
+        }
+      }).margin({ bottom: 8 });
+    }
+    .height('100%').width('100%').margin({ top: 50 })
+  }
+}

entry/src/main/ets/pages/TestChangeColorPage.ets

@@ -0,0 +1,112 @@
+/*
+ * Copyright (C) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the 'License');
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an 'AS IS' BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { drawing, common2D } from '@kit.ArkGraphics2D';
+import { ImageKnifeComponent, ImageKnifeOption } from '@ohos/imageknife';
+
+@Entry
+@Component
+struct TestChangeColorPage {
+  private imageOne: Resource = $r('app.media.ic_test_change_color_png');
+  private imageTwo: Resource = $r('app.media.ic_test_change_color_png');
+  @State src: Resource = this.imageOne
+  @State src2: Resource = this.imageTwo
+  @State color: common2D.Color = {
+    alpha: 255,
+    red: 255,
+    green: 1,
+    blue: 1
+  };
+  @State DrawingColorFilterFirst: ColorFilter | undefined = undefined
+
+  build() {
+    Column() {
+      Text($r('app.string.select_color_btn')).margin({ top: 20 })
+      Row() {
+        Button($r('app.string.red')).backgroundColor(Color.Red).margin(5).onClick(() => {
+          this.color = {
+            alpha: 255,
+            red: 255,
+            green: 1,
+            blue: 1
+          };
+        })
+        Button($r('app.string.yellow')).backgroundColor(Color.Yellow).margin(5).onClick(() => {
+          this.color = {
+            alpha: 255,
+            red: 255,
+            green: 255,
+            blue: 1
+          };
+        })
+        Button($r('app.string.green')).backgroundColor(Color.Green).margin(5).onClick(() => {
+          this.color = {
+            alpha: 255,
+            red: 1,
+            green: 255,
+            blue: 1
+          };
+        })
+        Button($r('app.string.blue')).backgroundColor(Color.Blue).margin(5).onClick(() => {
+          this.color = {
+            alpha: 255,
+            red: 1,
+            green: 1,
+            blue: 255
+          };
+        })
+      }
+      .width('100%')
+      .height(50)
+      .justifyContent(FlexAlign.Center)
+
+      Text($r('app.string.master_image')).margin({ top: 20 })
+      ImageKnifeComponent({
+        imageKnifeOption: new ImageKnifeOption({
+          loadSrc: this.src
+        })
+      }).width(110).height(110)
+
+      Text($r('app.string.click_img_to_change_color')).margin({ top: 30 })
+      ImageKnifeComponent({
+        imageKnifeOption: new ImageKnifeOption({
+          loadSrc: this.src,
+          drawingColorFilter: this.DrawingColorFilterFirst
+        })
+      })
+        .onClick(() => {
+          this.DrawingColorFilterFirst =
+            drawing.ColorFilter.createBlendModeColorFilter(this.color, drawing.BlendMode.SRC_IN);
+        }).width(110).height(110)
+
+      Text($r('app.string.test_non_svg_color')).margin({ top: 30 })
+      ImageKnifeComponent({
+        imageKnifeOption: new ImageKnifeOption({
+          loadSrc: $r('app.media.ic_test_change_color_png'),
+          drawingColorFilter: drawing.ColorFilter.createBlendModeColorFilter(this.color, drawing.BlendMode.SRC_IN)
+        })
+      }).width(110).height(110)
+
+      Text($r('app.string.test_svg_color')).margin({ top: 30 })
+      ImageKnifeComponent({
+        imageKnifeOption: new ImageKnifeOption({
+          loadSrc: $r("app.media.ic_test_change_color_svg"),
+          drawingColorFilter: drawing.ColorFilter.createBlendModeColorFilter(this.color, drawing.BlendMode.SRC_IN)
+        })
+      }).width(110).height(110)
+
+    }.width('100%').height('100%')
+  }
+}

entry/src/main/ets/pages/TestLoadCancelListenerPage.ets

@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the 'License');
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an 'AS IS' BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { ImageKnifeComponent, ImageKnifeOption } from '@ohos/imageknife';
+
+@Entry
+@ComponentV2
+struct TestLoadCancelListenerPage {
+  @Local currentWidth: number = 200
+  @Local currentHeight: number = 200
+  @Local showChild: boolean = true;
+  @Local text: string = "";
+  @Local ImageKnifeOption: ImageKnifeOption = new ImageKnifeOption({
+    loadSrc: "",
+    objectFit: ImageFit.Contain,
+    border: { radius: 50 }
+  })
+
+  build() {
+    Column() {
+      Text($r('app.string.onLoadCancel_reason', this.text)).margin(20).fontSize(15)
+      Button($r('app.string.rm_component_of_net'))
+        .margin(20)
+        .onClick(() => {
+          this.ImageKnifeOption = new ImageKnifeOption({
+            loadSrc: "https://contentcenter-drcn.dbankcdn.cn/pub_1/DevEcoSpace_1_900_9/76/v3/EyF6z4FISpCHhae38eEexw/OtyAiu-zSSevNQYvUdtVmA.jpg",
+            objectFit: ImageFit.Contain,
+            onLoadListener: {
+              onLoadStart: () => {
+                this.showChild = false;
+              },
+              onLoadCancel: (res) => {
+                this.text = res
+                console.log("TestLoadCancelListenerPage----onLoadCancel> url:" + res)
+              }
+            },
+            border: { radius: 50 }
+          })
+        })
+
+      Button($r('app.string.component_display'))
+        .margin(20).onClick(() => {
+        this.text = "";
+        this.showChild = true;
+        this.ImageKnifeOption = new ImageKnifeOption({
+          loadSrc: "",
+          objectFit: ImageFit.Contain,
+          border: { radius: 50 }
+        })
+      })
+      Button($r('app.string.rm_component_of_local'))
+        .margin(20)
+        .onClick(() => {
+          this.ImageKnifeOption = new ImageKnifeOption({
+            loadSrc: $r('app.media.loading'),
+            objectFit: ImageFit.Contain,
+            onLoadListener: {
+              onLoadStart: () => {
+                this.showChild = false;
+              },
+              onLoadCancel: (res) => {
+                this.text = res
+                console.log("TestLoadCancelListenerPage----onLoadCancel> url:" + res)
+              }
+            },
+            border: { radius: 50 }
+          })
+        })
+
+      if (this.showChild) {
+        ImageKnifeComponent(
+          { imageKnifeOption: this.ImageKnifeOption })
+          .height(150)
+          .width(150)
+          .backgroundColor(Color.Orange)
+          .margin({ top: 20 })
+      }
+    }
+    .height('100%')
+    .width('100%')
+  }
+}

entry/src/main/ets/pages/TestTaskResourcePage.ets

@@ -44,7 +44,7 @@ export struct ZuImage {
 struct TestTaskResourcePage {
   @Local stateMenus: Array<string> = [
     "https://hbimg.huabanimg.com/cc6af25f8d782d3cf3122bef4e61571378271145735e9-vEVggB",
-    'https://img-blog.csdnimg.cn/20191215043500229.png',
+    'https://contentcenter-drcn.dbankcdn.cn/pub_1/DevEcoSpace_1_900_9/bf/v3/lSjrRwFcS-ez6jp1ALSQFg/0n7R7XinSPyrYLqDu_1dfw.jpg',
     'https://img-blog.csdn.net/20140514114029140',
     'https://hbimg.huabanimg.com/95a6d37a39aa0b70d48fa18dc7df8309e2e0e8e85571e-x4hhks_fw658/format/webp',
   ]

entry/src/main/ets/pages/UserPage.ets

@@ -59,28 +59,28 @@ class CommonDataSource <T> implements IDataSource {
 struct Index {
   @Local hotCommendList:CommonDataSource<string> = new CommonDataSource<string>([])
   private data:string[] = [
-    "http://e.hiphotos.baidu.com/image/pic/item/a1ec08fa513d2697e542494057fbb2fb4316d81e.jpg",
+    "https://contentcenter-drcn.dbankcdn.cn/pub_1/DevEcoSpace_1_900_9/56/v3/8MdhfSsCSMKj4sA6okUWrg/5uBx56tLTUO3RYQl-E5JiQ.jpg",
-    "http://c.hiphotos.baidu.com/image/pic/item/30adcbef76094b36de8a2fe5a1cc7cd98d109d99.jpg",
+    "https://contentcenter-drcn.dbankcdn.cn/pub_1/DevEcoSpace_1_900_9/e2/v3/4zI1Xm_3STmV30aZXWRrKw/6aN7WodDRUiBApgffiLPCg.jpg",
-    "http://h.hiphotos.baidu.com/image/pic/item/7c1ed21b0ef41bd5f2c2a9e953da81cb39db3d1d.jpg",
+    "https://contentcenter-drcn.dbankcdn.cn/pub_1/DevEcoSpace_1_900_9/42/v3/2dSQCqERTP2TTPyssOMEbQ/zL1ebnKKQ_ilqTDcwCAkOw.jpg",
-    "http://g.hiphotos.baidu.com/image/pic/item/55e736d12f2eb938d5277fd5d0628535e5dd6f4a.jpg",
+    "https://contentcenter-drcn.dbankcdn.cn/pub_1/DevEcoSpace_1_900_9/78/v3/qQJpAtRGQe2e_VhbGHDgIw/b3zlit99S6GybD3XdNwqJw.jpg",
-    "http://e.hiphotos.baidu.com/image/pic/item/4e4a20a4462309f7e41f5cfe760e0cf3d6cad6ee.jpg",
+    "https://contentcenter-drcn.dbankcdn.cn/pub_1/DevEcoSpace_1_900_9/55/v3/5DZ2LLqYSsK85-shqgLveQ/7ZXcyCWNTvOzQP5FFLBGkg.jpg",
-    "http://b.hiphotos.baidu.com/image/pic/item/9d82d158ccbf6c81b94575cfb93eb13533fa40a2.jpg",
+    "https://contentcenter-drcn.dbankcdn.cn/pub_1/DevEcoSpace_1_900_9/3e/v3/LqRoLI-PRSu9Nqa8KdJ-pQ/dSqskBpSR9eraAMn7NBdqA.jpg",
-    "http://e.hiphotos.baidu.com/image/pic/item/4bed2e738bd4b31c1badd5a685d6277f9e2ff81e.jpg",
+    "https://contentcenter-drcn.dbankcdn.cn/pub_1/DevEcoSpace_1_900_9/25/v3/jgB2ekkTRX-3yTYZalnANQ/xff_x9cbSPqb7fbNwgJa7A.jpg",
-    "http://g.hiphotos.baidu.com/image/pic/item/0d338744ebf81a4c87a3add4d52a6059252da61e.jpg",
+    "https://contentcenter-drcn.dbankcdn.cn/pub_1/DevEcoSpace_1_900_9/fb/v3/alXwXLHKSyCAIWt_ydgD2g/BCCuu25TREOitQxM7eYOEw.jpg",
-    "http://a.hiphotos.baidu.com/image/pic/item/f2deb48f8c5494ee5080c8142ff5e0fe99257e19.jpg",
+    "https://contentcenter-drcn.dbankcdn.cn/pub_1/DevEcoSpace_1_900_9/63/v3/qbe6NZkCQyGcITvdWoZBgg/Y-5U1z3GT_yaK8CBD3jkwg.jpg",
-    "http://f.hiphotos.baidu.com/image/pic/item/4034970a304e251f503521f5a586c9177e3e53f9.jpg",
+    "https://contentcenter-drcn.dbankcdn.cn/pub_1/DevEcoSpace_1_900_9/16/v3/fm2tO4TsRH6mv_D_nSSd5w/FscLpLwQQ-KuV7oaprFK2Q.jpg",
-    "http://b.hiphotos.baidu.com/image/pic/item/279759ee3d6d55fbb3586c0168224f4a20a4dd7e.jpg",
+    "https://contentcenter-drcn.dbankcdn.cn/pub_1/DevEcoSpace_1_900_9/89/v3/UAUvtPHqRD-GWWANsEC57Q/zcRJCQebQ322Aby4jzmwmQ.jpg",
-    "http://img2.xkhouse.com/bbs/hfhouse/data/attachment/forum/corebbs/2009-11/2009113011534566298.jpg",
+    "https://contentcenter-drcn.dbankcdn.cn/pub_1/DevEcoSpace_1_900_9/30/v3/tUUzzx73R4yp8G--lMhuWQ/EBbcu_dLTT-Jj68XAh6mtA.jpg",
-    "http://a.hiphotos.baidu.com/image/pic/item/e824b899a9014c087eb617650e7b02087af4f464.jpg",
+    "https://contentcenter-drcn.dbankcdn.cn/pub_1/DevEcoSpace_1_900_9/76/v3/EyF6z4FISpCHhae38eEexw/OtyAiu-zSSevNQYvUdtVmA.jpg",
-    "http://c.hiphotos.baidu.com/image/pic/item/9c16fdfaaf51f3de1e296fa390eef01f3b29795a.jpg",
+    "https://contentcenter-drcn.dbankcdn.cn/pub_1/DevEcoSpace_1_900_9/37/v3/12rH1yiEQmK9wlOOcy5avQ/RzBXiEBRRqOC7LRkwNj6VA.jpg",
-    "http://d.hiphotos.baidu.com/image/pic/item/b58f8c5494eef01f119945cbe2fe9925bc317d2a.jpg",
+    "https://contentcenter-drcn.dbankcdn.cn/pub_1/DevEcoSpace_1_900_9/9a/v3/TpRN4AIzRoyUXIqWdKoE0g/ShOnD_tfS46HDbpSWhbCkQ.jpg",
-    "http://h.hiphotos.baidu.com/image/pic/item/902397dda144ad340668b847d4a20cf430ad851e.jpg",
+    "https://contentcenter-drcn.dbankcdn.cn/pub_1/DevEcoSpace_1_900_9/03/v3/H3X17s8eTdS2w56JgbB5jQ/a45sT-j8Sbe8sSQXTzeYvQ.jpg",
-    "http://b.hiphotos.baidu.com/image/pic/item/359b033b5bb5c9ea5c0e3c23d139b6003bf3b374.jpg",
+    "https://contentcenter-drcn.dbankcdn.cn/pub_1/DevEcoSpace_1_900_9/10/v3/qaEzwkU0QeKb1yehnP2Xig/q7fxAlgMQKup-HUBayRLGQ.jpg",
-    "http://a.hiphotos.baidu.com/image/pic/item/8d5494eef01f3a292d2472199d25bc315d607c7c.jpg",
+    "https://contentcenter-drcn.dbankcdn.cn/pub_1/DevEcoSpace_1_900_9/96/v3/rMJJoAflTDSWa1z2pHs2wg/8dOqD0GlQBOCL5AvQok9FQ.jpg",
-    "http://b.hiphotos.baidu.com/image/pic/item/e824b899a9014c08878b2c4c0e7b02087af4f4a3.jpg",
+    "https://contentcenter-drcn.dbankcdn.cn/pub_1/DevEcoSpace_1_900_9/ed/v3/KMO4D6D2QGuVOCLX4AhOFA/ef51xAaLQuK7BsnuD9abog.jpg",
-    "http://g.hiphotos.baidu.com/image/pic/item/6d81800a19d8bc3e770bd00d868ba61ea9d345f2.jpg",
+    "https://contentcenter-drcn.dbankcdn.cn/pub_1/DevEcoSpace_1_900_9/d9/v3/FSZH0aTdSqWxeAaxoPvi0g/RqxPxUCXQFiTMBfKTF9kkw.jpg",
     "https://hbimg.huabanimg.com/cc6af25f8d782d3cf3122bef4e61571378271145735e9-vEVggB",
-    'https://img-blog.csdnimg.cn/20191215043500229.png',
+    'https://contentcenter-drcn.dbankcdn.cn/pub_1/DevEcoSpace_1_900_9/bf/v3/lSjrRwFcS-ez6jp1ALSQFg/0n7R7XinSPyrYLqDu_1dfw.jpg',
     'https://img-blog.csdn.net/20140514114029140',
     'https://hbimg.huabanimg.com/95a6d37a39aa0b70d48fa18dc7df8309e2e0e8e85571e-x4hhks_fw658/format/webp',
   ]

entry/src/main/resources/base/element/string.json

@@ -367,6 +367,150 @@
     {
       "name": "TIPS",
       "value": "Please shut down the network first and ensure that there is no cache of images from this network in the test failure scenario locally"
+    },
+    {
+      "name": "Image_Downsampling_Functionality",
+      "value": "Downscale Image effect"
+    },
+    {
+      "name": "Sampling_pecification",
+      "value": "降采样规格"
+    },
+    {
+      "name": "Unreal_samples",
+      "value": "未降采样大小"
+    },
+    {
+      "name": "After_the_sampling",
+      "value": "降采样后大小"
+    },
+    {
+      "name": "image_format",
+      "value": "picture format：%s"
+    },
+    {
+      "name": "image_width",
+      "value": "image width：%d"
+    },
+    {
+      "name": "image_height",
+      "value": "image height：%d"
+    },
+    {
+      "name": "cur_cache_limit",
+      "value": "%s:current cache limit：%fM"
+    },
+    {
+      "name": "cur_cache_image_num",
+      "value": "%s:current cache image number：%d"
+    },
+    {
+      "name": "cur_cache_size",
+      "value": "%s:current cache size：%fM"
+    },
+    {
+      "name": "load_memory",
+      "value": "memory loaded picture"
+    },
+    {
+      "name": "load_disk",
+      "value": "disk cache loads images"
+    },
+    {
+      "name": "get_cur_memory_limit",
+      "value": "gets the current memory cache upper limit"
+    },
+    {
+      "name": "get_img_number_of_cache",
+      "value": "gets the number of images cached in memory"
+    },
+    {
+      "name": "get_cur_memory_size",
+      "value": "gets the size of the current cache"
+    },
+    {
+      "name": "get_cur_disk_limit",
+      "value": "Gets the current disk cache upper limit"
+    },
+    {
+      "name": "get_img_number_of_disk",
+      "value": "gets the number of images cached on disk"
+    },
+    {
+      "name": "get_cur_disk_size",
+      "value": "gets the size of the current disk"
+    },
+    {
+      "name": "select_color_btn",
+      "value": "click to select the color you want to change"
+    },
+    {
+      "name": "click_img_to_change_color",
+      "value": "click on the image to change the image color"
+    },
+    {
+      "name": "test_non_svg_color",
+      "value": "test non-SVG images for color change"
+    },
+    {
+      "name": "test_svg_color",
+      "value": "Test svg picture color change"
+    },
+    {
+      "name": "red",
+      "value": "red"
+    },
+    {
+      "name": "yellow",
+      "value": "yellow"
+    },
+    {
+      "name": "green",
+      "value": "green"
+    },
+    {
+      "name": "blue",
+      "value": "blue"
+    },
+    {
+      "name": "master_image",
+      "value": "master image:"
+    },
+    {
+      "name": "rm_component_of_net",
+      "value": "remove Component - Network load picture"
+    },
+    {
+      "name": "rm_component_of_local",
+      "value": "remove Component - Local resource picture"
+    },
+    {
+      "name": "component_display",
+      "value": "recovery component display"
+    },
+    {
+      "name": "onLoadCancel_reason",
+      "value": "onLoadCancel callback reason:%s"
+    },
+    {
+      "name": "test_cache_btn",
+      "value": "test data for in cache"
+    },
+    {
+      "name": "test_change_color_btn",
+      "value": "test change color for image"
+    },
+    {
+      "name": "test_cancel_callback_btn",
+      "value": "test callback of cancel"
+    },
+    {
+      "name": "memory",
+      "value": "Memory"
+    },
+    {
+      "name": "disk",
+      "value": "Disk"
     }
   ]
 }

entry/src/main/resources/base/media/ic_test_change_color_svg.svg

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="24px" height="24px" viewBox="0 0 24 24" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <title>svg细图标</title>
+    <g id="细图标" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
+        <g id="dot_radiowaves_left_and_right" fill="#000000" fill-rule="nonzero">
+            <rect id="矩形" opacity="0" x="0" y="0" width="24" height="24"></rect>
+            <g id="编组" transform="translate(0.000000, 3.000000)" fill-opacity="0.90196079">
+                <path d="M12,7.01 C11.44,7.01 10.9633333,7.20666667 10.57,7.6 C10.1766667,7.98666667 9.98,8.45333333 9.98,9 C9.98,9.54666667 10.18,10.02 10.58,10.42 C10.98,10.82 11.4533333,11.02 12,11.02 C12.5466667,11.02 13.0133333,10.8233333 13.4,10.43 C13.7933333,10.0366667 13.99,9.56 13.99,9 C13.99,8.44 13.8,7.96666667 13.42,7.58 C13.0333333,7.2 12.56,7.01 12,7.01 Z" id="路径"></path>
+                <path d="M5.23,9 C5.23,10.1533333 5.50666667,11.2333333 6.06,12.24 C6.61333333,13.2466667 7.37666667,14.0633333 8.35,14.69 C8.53,14.8033333 8.72,14.8333333 8.92,14.78 C9.12,14.7333333 9.27333333,14.6233333 9.38,14.45 C9.49333333,14.27 9.52666667,14.08 9.48,13.88 C9.43333333,13.68 9.33,13.5266667 9.17,13.42 C8.41666667,12.92 7.82333333,12.2833333 7.39,11.51 C6.95666667,10.73 6.74,9.89333333 6.74,9 C6.74,8.10666667 6.95333333,7.26666667 7.38,6.48 C7.80666667,5.69333333 8.40333333,5.05333333 9.17,4.56 C9.34333333,4.44666667 9.45,4.29 9.49,4.09 C9.53,3.89 9.49333333,3.70333333 9.38,3.53 C9.27333333,3.35 9.12,3.23666667 8.92,3.19 C8.72,3.14333333 8.53,3.18333333 8.35,3.31 C7.37666667,3.93666667 6.61333333,4.75 6.06,5.75 C5.50666667,6.75 5.23,7.83333333 5.23,9 Z M14.59,14.45 C14.7033333,14.6233333 14.8533333,14.7333333 15.04,14.78 C15.22,14.8333333 15.4233333,14.8033333 15.65,14.69 C16.29,14.27 16.84,13.7666667 17.3,13.18 C17.7666667,12.5866667 18.1233333,11.9333333 18.37,11.22 C18.6166667,10.5066667 18.74,9.76666667 18.74,9 C18.74,7.83333333 18.47,6.75 17.93,5.75 C17.3833333,4.75 16.6233333,3.93666667 15.65,3.31 C15.47,3.18333333 15.2766667,3.14333333 15.07,3.19 C14.8633333,3.23666667 14.7033333,3.35 14.59,3.53 C14.4766667,3.70333333 14.44,3.88666667 14.48,4.08 C14.52,4.27333333 14.63,4.42666667 14.81,4.54 L14.83,4.56 C15.5833333,5.05333333 16.1766667,5.69333333 16.61,6.48 C17.0433333,7.26666667 17.26,8.10666667 17.26,9 C17.26,9.59333333 17.1633333,10.1666667 16.97,10.72 C16.7766667,11.2666667 16.4966667,11.7733333 16.13,12.24 C15.7633333,12.7066667 15.33,13.1 14.83,13.42 C14.6566667,13.5266667 14.5466667,13.68 14.5,13.88 C14.4466667,14.08 14.4766667,14.27 14.59,14.45 Z" id="形状"></path>
+                <path d="M0.77,9 C0.77,10.6666667 1.12,12.2466667 1.82,13.74 C2.52666667,15.2333333 3.51333333,16.5166667 4.78,17.59 C4.94,17.7166667 5.12,17.7733333 5.32,17.76 C5.52,17.7466667 5.69,17.6666667 5.83,17.52 C5.95666667,17.36 6.01333333,17.1766667 6,16.97 C5.98666667,16.7633333 5.9,16.5866667 5.74,16.44 C4.63333333,15.5133333 3.77666667,14.4 3.17,13.1 C2.56333333,11.8066667 2.26,10.44 2.26,9 C2.26,7.56 2.56333333,6.18666667 3.17,4.88 C3.77666667,3.58 4.64,2.46666667 5.76,1.54 C5.90666667,1.39333333 5.99,1.21666667 6.01,1.01 C6.03666667,0.803333333 5.97666667,0.626666667 5.83,0.48 C5.70333333,0.32 5.53666667,0.233333333 5.33,0.22 C5.12333333,0.2 4.94,0.253333333 4.78,0.38 C3.51333333,1.45333333 2.52666667,2.74333333 1.82,4.25 C1.12,5.75 0.77,7.33333333 0.77,9 Z M18.17,17.5 C18.2966667,17.66 18.4633333,17.7466667 18.67,17.76 C18.8766667,17.7733333 19.06,17.7166667 19.22,17.59 C20.0733333,16.89 20.8,16.0833333 21.4,15.17 C22,14.2566667 22.4533333,13.2766667 22.76,12.23 C23.0733333,11.1833333 23.23,10.1066667 23.23,9 C23.23,7.89333333 23.0733333,6.81666667 22.76,5.77 C22.4533333,4.72333333 22,3.74 21.4,2.82 C20.8,1.9 20.0733333,1.08666667 19.22,0.38 C19.06,0.253333333 18.8766667,0.2 18.67,0.22 C18.4633333,0.233333333 18.2966667,0.32 18.17,0.48 C18.0233333,0.64 17.96,0.823333333 17.98,1.03 C17.9933333,1.23666667 18.08,1.40666667 18.24,1.54 C18.9733333,2.14666667 19.6,2.85 20.12,3.65 C20.64,4.45 21.0366667,5.3 21.31,6.2 C21.5833333,7.10666667 21.72,8.04 21.72,9 C21.72,9.96 21.5833333,10.8933333 21.31,11.8 C21.0366667,12.7 20.6466667,13.5466667 20.14,14.34 C19.6266667,15.1333333 19,15.8333333 18.26,16.44 C18.1,16.5666667 18.0133333,16.7333333 18,16.94 C17.9866667,17.1533333 18.0433333,17.34 18.17,17.5 Z" id="形状"></path>
+            </g>
+        </g>
+    </g>
+</svg>

entry/src/main/resources/base/profile/main_pages.json

@@ -3,7 +3,6 @@
     "pages/Index",
     "pages/ListPage",
     "pages/SingleImage",
-    "pages/ManyPhotoShowPage",
     "pages/LongImagePage",
     "pages/TransformPage",
     "pages/UserPage",
@@ -23,6 +22,10 @@
     "pages/ImageAnimatorPage",
     "pages/TestSetCustomImagePage",
     "pages/TestErrorHolderPage",
-    "pages/TestTaskResourcePage"
+    "pages/TestTaskResourcePage",
+    "pages/DownSamplePage",
+    "pages/TestCacheDataPage",
+    "pages/TestChangeColorPage",
+    "pages/TestLoadCancelListenerPage"
   ]
 }

entry/src/main/resources/zh_CN/element/string.json

@@ -363,6 +363,150 @@
     {
       "name": "TIPS",
       "value": "测试失败场景请先关闭网络，并保证本地没有此网络图片的缓存"
+    },
+    {
+    "name": "Image_Downsampling_Functionality",
+    "value": "降采样功能"
+    },
+    {
+      "name": "Sampling_pecification",
+      "value": "降采样规格"
+    },
+    {
+      "name": "Unreal_samples",
+      "value": "未降采样大小"
+    },
+    {
+      "name": "After_the_sampling",
+      "value": "降采样后大小"
+    },
+    {
+      "name": "image_format",
+      "value": "图片格式：%s"
+    },
+    {
+      "name": "image_width",
+      "value": "图片宽度：%d"
+    },
+    {
+      "name": "image_height",
+      "value": "图片高度：%d"
+    },
+    {
+      "name": "cur_cache_limit",
+      "value": "%s:当前缓存上限：%fM"
+    },
+    {
+      "name": "cur_cache_image_num",
+      "value": "%s:当前缓存图片数量：%d"
+    },
+    {
+      "name": "cur_cache_size",
+      "value": "%s:当前缓存的大小：%fM"
+    },
+    {
+      "name": "load_memory",
+      "value": "内存加载图片"
+    },
+    {
+      "name": "load_disk",
+      "value": "磁盘缓存加载图片"
+    },
+    {
+      "name": "get_cur_memory_limit",
+      "value": "获取当前内存缓存上限"
+    },
+    {
+      "name": "get_img_number_of_cache",
+      "value": "获取当前内存缓存图片数量"
+    },
+    {
+      "name": "get_cur_memory_size",
+      "value": "获取当前缓存的大小"
+    },
+    {
+      "name": "get_cur_disk_limit",
+      "value": "获取当前磁盘缓存上限"
+    },
+    {
+      "name": "get_img_number_of_disk",
+      "value": "获取当前磁盘缓存图片数量"
+    },
+    {
+      "name": "get_cur_disk_size",
+      "value": "获取当前磁盘的大小"
+    },
+    {
+      "name": "select_color_btn",
+      "value": "点击选择要更改的颜色"
+    },
+    {
+      "name": "click_img_to_change_color",
+      "value": "点击图片更改图片颜色"
+    },
+    {
+      "name": "test_non_svg_color",
+      "value": "测试非svg图片变色"
+    },
+    {
+      "name": "test_svg_color",
+      "value": "测试svg图片变色"
+    },
+    {
+      "name": "red",
+      "value": "红色"
+    },
+    {
+      "name": "yellow",
+      "value": "黄色"
+    },
+    {
+      "name": "green",
+      "value": "绿色"
+    },
+    {
+      "name": "blue",
+      "value": "蓝色"
+    },
+    {
+      "name": "master_image",
+      "value": "原图:"
+    },
+    {
+      "name": "rm_component_of_net",
+      "value": "移除组件-网络加载图片"
+    },
+    {
+      "name": "rm_component_of_local",
+      "value": "移除组件-本地资源图片"
+    },
+    {
+      "name": "component_display",
+      "value": "恢复组件显示"
+    },
+    {
+      "name": "onLoadCancel_reason",
+      "value": "onLoadCancel回调原因:%s"
+    },
+    {
+      "name": "test_cache_btn",
+      "value": "测试缓存数据"
+    },
+    {
+      "name": "test_change_color_btn",
+      "value": "测试颜色变换"
+    },
+    {
+      "name": "test_cancel_callback_btn",
+      "value": "测试加载取消回调接口"
+    },
+    {
+      "name": "memory",
+      "value": "内存"
+    },
+    {
+      "name": "disk",
+      "value": "磁盘"
     }
   ]
 }

entry/src/ohosTest/ets/test/List.test.ets

@@ -18,6 +18,8 @@ import ImageKnifeOptionTest from './ImageKnifeOption.test';
 import MemoryLruCacheTest from './MemoryLruCache.test';
 import ImageKnifeTest from './ImageKnife.test';
 import Transform from './transform.test';
+import SamplingTest from './SamplingTest.test';
+import imageFormatAndSize from  './imageFormatAndSize.test'
 
 export default function testsuite() {
   MemoryLruCacheTest();
@@ -26,4 +28,6 @@ export default function testsuite() {
   ImageKnifeOptionTest();
   ImageKnifeTest();
   Transform();
+  SamplingTest()
+  imageFormatAndSize();
 }

entry/src/ohosTest/ets/test/SamplingTest.test.ets

@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the 'License');
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an 'AS IS' BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import { describe, beforeAll, beforeEach, afterEach, afterAll, it, expect } from '@ohos/hypium'
+import { image } from '@kit.ImageKit'
+import { BusinessError } from '@kit.BasicServicesKit'
+import { calculateScaleType, Downsampler } from '@ohos/imageknife/src/main/ets/downsampling/Downsampler'
+import { DownsampleStrategy } from '@ohos/imageknife'
+
+export default function SamplingTest() {
+  describe('SamplingTest', () => {
+    // Defines a test suite. Two parameters are supported: test suite name and test suite function.
+    beforeAll(() => {
+      // Presets an action, which is performed only once before all test cases of the test suite start.
+      // This API supports only one parameter: preset action function.
+    })
+    beforeEach(() => {
+      // Presets an action, which is performed before each unit test case starts.
+      // The number of execution times is the same as the number of test cases defined by **it**.
+      // This API supports only one parameter: preset action function.
+    })
+    afterEach(() => {
+      // Presets a clear action, which is performed after each unit test case ends.
+      // The number of execution times is the same as the number of test cases defined by **it**.
+      // This API supports only one parameter: clear action function.
+    })
+    afterAll(() => {
+      // Presets a clear action, which is performed after all test cases of the test suite end.
+      // This API supports only one parameter: clear action function.
+    })
+    it('NONE', 0, () => {
+      let reqSize: calculateScaleType =
+        new Downsampler().calculateScaling('jpg', 1024, 1024, 200,
+          200, DownsampleStrategy.NONE,)
+      let req = (reqSize.targetWidth == 1024 && reqSize.targetHeight == 1024)
+      expect(req).assertEqual(true);
+    })
+    it('AT_MOST', 1, () => {
+      let reqSize: calculateScaleType =
+        new Downsampler().calculateScaling('jpg', 1024, 1024, 200,
+          200, DownsampleStrategy.AT_MOST)
+      let req = (reqSize.targetWidth < 1024 && reqSize.targetHeight < 1024)
+      expect(req).assertEqual(true);
+    })
+    it('FIT_CENTER', 2, () => {
+      let reqSize: calculateScaleType =
+        new Downsampler().calculateScaling('jpg', 1024, 1024, 200,
+          200, DownsampleStrategy.FIT_CENTER_MEMORY)
+      let req = (reqSize.targetWidth < 1024 && reqSize.targetHeight < 1024)
+      expect(req).assertEqual(true);
+    })
+    it('CENTER_OUTSIDE', 3, () => {
+      let reqSize: calculateScaleType =
+        new Downsampler().calculateScaling('jpg', 1024, 1024, 200,
+          200, DownsampleStrategy.CENTER_OUTSIDE_MEMORY)
+      let req = (reqSize.targetWidth < 1024 && reqSize.targetHeight < 1024)
+      expect(req).assertEqual(true);
+    })
+    it('AT_LEAST', 4, () => {
+      let reqSize: calculateScaleType =
+        new Downsampler().calculateScaling('jpg', 1024, 1024, 200,
+          200, DownsampleStrategy.AT_LEAST)
+      let req = (reqSize.targetWidth < 1024 && reqSize.targetHeight < 1024)
+      expect(req).assertEqual(true);
+    })
+
+  })
+}

entry/src/ohosTest/ets/test/imageFormatAndSize.test.ets

@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the 'License');
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an 'AS IS' BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import { describe, beforeAll, beforeEach, afterEach, afterAll, it, expect } from '@ohos/hypium';
+import {
+  ImageKnifeOption,
+  ImageKnife,
+  ImageKnifeRequest,
+  ImageKnifeRequestSource,
+  CacheStrategy
+} from "@ohos/imageknife"
+import { common } from '@kit.AbilityKit';
+
+export default function imageFormatAndSize() {
+  describe('imageFormatAndSize', () => {
+    // Defines a test suite. Two parameters are supported: test suite name and test suite function.
+    beforeAll(() => {
+      // Presets an action, which is performed only once before all test cases of the test suite start.
+      // This API supports only one parameter: preset action function.
+    });
+    beforeEach(() => {
+      // Presets an action, which is performed before each unit test case starts.
+      // The number of execution times is the same as the number of test cases defined by **it**.
+      // This API supports only one parameter: preset action function.
+    });
+    afterEach(() => {
+      // Presets a clear action, which is performed after each unit test case ends.
+      // The number of execution times is the same as the number of test cases defined by **it**.
+      // This API supports only one parameter: clear action function.
+    });
+    afterAll(() => {
+      // Presets a clear action, which is performed after all test cases of the test suite end.
+      // This API supports only one parameter: clear action function.
+    });
+    it('getImageSizeInCache', 0, async () => {
+      let width = 0;
+      let height = 0;
+      let imageFormat: string = "";
+      let url: string =
+        "https://contentcenter-drcn.dbankcdn.cn/pub_1/DevEcoSpace_1_900_9/ed/v3/KMO4D6D2QGuVOCLX4AhOFA/ef51xAaLQuK7BsnuD9abog.jpg"
+      let imageKnifeOption: ImageKnifeOption = new ImageKnifeOption({
+        loadSrc: url,
+      })
+      await new Promise<string>((resolve, reject) => {
+        imageKnifeOption.onLoadListener = {
+          onLoadSuccess: (data, imageknifeData) => {
+            resolve("")
+          },
+          onLoadFailed(err) {
+            reject(err)
+          }
+        }
+        let request = new ImageKnifeRequest(
+          imageKnifeOption,
+          imageKnifeOption.context !== undefined ? imageKnifeOption.context : getContext() as common.UIAbilityContext,
+          0,
+          0,
+          0,
+          {
+            showPixelMap(version: number, pixelMap: PixelMap | string) {
+            }
+          }
+        )
+        ImageKnife.getInstance().execute(request);
+      })
+      let data = await ImageKnife.getInstance()
+        .getCacheImage(url, CacheStrategy.Memory);
+      if (data) {
+        width = data.imageWidth
+        height = data.imageHeight
+        imageFormat = data.type!
+      }
+      expect(width != 0).assertTrue();
+      expect(height != 0).assertTrue();
+      expect(imageFormat != "").assertTrue();
+    });
+  });
+}

library/index.ets

@@ -66,4 +66,6 @@ export { CropTransformation } from './src/main/ets/transform/CropTransformation'
 
 export { MaskTransformation } from './src/main/ets/transform/MaskTransformation'
 
-export { SepiaTransformation } from './src/main/ets/transform/SepiaTransformation'
+export { SepiaTransformation } from './src/main/ets/transform/SepiaTransformation'
+
+export { DownsampleStrategy } from './src/main/ets/downsampling/DownsampleStartegy'

library/src/main/ets/ImageKnife.ets

@@ -302,6 +302,66 @@ export class ImageKnife {
     return this.fileCache as FileCache
   }
 
+  /**
+   * get cache upper limit
+   * @param cacheType
+   * @returns
+   */
+  getCacheUpperLimit(cacheType?: CacheStrategy): number | undefined {
+    if (cacheType == undefined || cacheType == CacheStrategy.Default) {
+      cacheType = CacheStrategy.Memory;
+    }
+    if (cacheType == CacheStrategy.Memory) {
+      return (this.memoryCache as MemoryLruCache).maxMemory;
+    } else {
+      if (this.isFileCacheInit()) {
+        return this.fileCache?.maxMemory;
+      } else {
+        throw new Error("the disk cache not init");
+      }
+    }
+  }
+
+  /**
+   * gets the number of images currently cached
+   * @param cacheType
+   * @returns
+   */
+  getCurrentPicturesNum(cacheType: CacheStrategy): number | undefined {
+    if (cacheType == undefined || cacheType == CacheStrategy.Default) {
+      cacheType = CacheStrategy.Memory;
+    }
+    if (cacheType == CacheStrategy.Memory) {
+      return (this.memoryCache as MemoryLruCache).size();
+    } else {
+      if (this.isFileCacheInit()) {
+        return this.fileCache?.size();
+      } else {
+        throw new Error("the disk cache not init");
+      }
+    }
+  }
+
+  /**
+   * gets the current cache size
+   * @param cacheType
+   * @returns
+   */
+  getCurrentCacheSize(cacheType: CacheStrategy): number | undefined {
+    if (cacheType == undefined || cacheType == CacheStrategy.Default) {
+      cacheType = CacheStrategy.Memory;
+    }
+    if (cacheType == CacheStrategy.Memory) {
+      return (this.memoryCache as MemoryLruCache).currentMemory;
+    } else {
+      if (this.isFileCacheInit()) {
+        return this.fileCache?.currentMemory;
+      } else {
+        throw new Error("the disk cache not init");
+      }
+    }
+  }
+
 
   private pixelMapToArrayBuffer(pixelMap: PixelMap): ArrayBuffer {
     let imageInfo = pixelMap.getImageInfoSync();

library/src/main/ets/ImageKnifeDispatcher.ets

@@ -35,6 +35,7 @@ import {
 } from './model/ImageKnifeData'
 import { BusinessError } from '@kit.BasicServicesKit';
 import { ImageKnifeLoader } from './ImageKnifeLoader'
+import { DownsampleStrategy } from './downsampling/DownsampleStartegy';
 
 
 export class ImageKnifeDispatcher {
@@ -183,7 +184,10 @@ export class ImageKnifeDispatcher {
       fileCacheFolder: ImageKnife.getInstance().getFileCache()?.getCacheFolder(),
       isAnimator:isAnimator,
       moduleName: moduleName == "" ? undefined : moduleName,
-      resName: resName == "" ? undefined : resName
+      resName: resName == "" ? undefined : resName,
+      targetWidth: currentRequest.componentWidth,
+      targetHeight: currentRequest.componentHeight,
+      downsampType: currentRequest.imageKnifeOption.downsampleOf==undefined?DownsampleStrategy.NONE:currentRequest.imageKnifeOption.downsampleOf,
     }
 
     if(request.customGetImage == undefined) {

library/src/main/ets/ImageKnifeLoader.ets

@@ -28,6 +28,8 @@ import emitter from '@ohos.events.emitter';
 import image from '@ohos.multimedia.image';
 import { RequestJobResult } from './model/ImageKnifeData'
 import util from '@ohos.util';
+import { DownsampleStrategy } from './downsampling/DownsampleStartegy';
+import { Downsampler } from './downsampling/Downsampler';
 
 class RequestData {
   receiveSize: number = 2000
@@ -73,6 +75,15 @@ export class ImageKnifeLoader {
     }
 
     let size = (await imageSource.getImageInfo()).size
+    try {
+      if ((request.downsampType !== DownsampleStrategy.NONE) &&
+        request.requestSource == ImageKnifeRequestSource.SRC) {
+        decodingOptions = ImageKnifeLoader.getDownsamplerDecodingOptions(typeValue, request, size, ImageKnifeRequestSource.SRC)
+      }
+    } catch (err) {
+      return  ImageKnifeLoader.makeEmptyResult(err)
+    }
+
     await imageSource.createPixelMap(decodingOptions)
       .then((pixelmap: PixelMap) => {
         resPixelmap = pixelmap
@@ -110,6 +121,14 @@ export class ImageKnifeLoader {
       editable: true,
       desiredSize: defaultSize
     };
+    try {
+      if ((request.downsampType !== DownsampleStrategy.NONE) &&
+        request.requestSource == ImageKnifeRequestSource.SRC) {
+        opts = ImageKnifeLoader.getDownsamplerDecodingOptions(typeValue, request, size)
+      }
+    } catch (err) {
+       return ImageKnifeLoader.makeEmptyResult(err)
+    }
     await imageSource.createPixelMap(opts)
       .then((pixelmap: PixelMap) => {
         resPixelmap = pixelmap
@@ -354,4 +373,30 @@ export class ImageKnifeLoader {
     }
     return resBuf
   }
-}
+
+    static getDownsamplerDecodingOptions(typeValue: string, request: RequestJobRequest, size: Size,
+    SRC?: ImageKnifeRequestSource):image.DecodingOptions {
+    let reqSize =
+      new Downsampler().calculateScaling(typeValue, size.width, size.height, request.targetWidth, request.targetHeight,
+        request.downsampType)
+    if (typeValue == "svg") {
+      return {
+        editable: true,
+        desiredSize: {
+          height: vp2px(reqSize.height),
+          width: vp2px(reqSize.width)
+        }
+
+      }
+    } else {
+      return {
+        editable: request.requestSource === SRC && request.transformation !== undefined ? true : false,
+        desiredSize:{
+          width: reqSize.width,
+          height: reqSize.height
+        }
+      }
+    }
+  }
+}
+

library/src/main/ets/components/ImageKnifeComponent.ets

@@ -38,7 +38,7 @@ export struct ImageKnifeComponent {
   @Param imageKnifeOption: ImageKnifeOption = new ImageKnifeOption();
 
   @Monitor('imageKnifeOption',
-  "imageKnifeOption.loadSrc","imageKnifeOption.signature","imageKnifeOption.transformation","imageKnifeOption.border","imageKnifeOption.objectFit")
+  "imageKnifeOption.loadSrc","imageKnifeOption.signature","imageKnifeOption.transformation","imageKnifeOption.border","imageKnifeOption.objectFit",'imageKnifeOption.downsampleOf')
   watchImageKnifeOption() {
     this.clearLastRequest()
     this.componentVersion++

library/src/main/ets/downsampling/BaseDownsampling.ets

@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import { DownsampleStrategy } from './DownsampleStartegy';
+
+import { SampleSizeRounding } from './DownsampleUtils';
+
+export interface BaseDownsampling {
+  getName(): string
+
+  getScaleFactor(sourceWidth: number, sourceHeight: number, requestWidth: number, requestHeight: number,downsampType?:DownsampleStrategy): number
+}

library/src/main/ets/downsampling/DownsampleStartegy.ets

@@ -0,0 +1,148 @@
+/*
+ * Copyright (C) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import { BaseDownsampling } from './BaseDownsampling';
+import { getScale, highestOneBit, round, SampleSizeRounding } from './DownsampleUtils';
+
+export class FitCenter implements BaseDownsampling {
+  getName() {
+    return "FitCenter"
+  }
+
+  getScaleFactor(sourceWidth: number, sourceHeight: number, requestedWidth: number, requestedHeight: number,
+    downsampType: DownsampleStrategy
+  ): number {
+    //重新计算宽高比;
+    let outSize: Size = {
+      width: round(getScale(sourceWidth, sourceHeight, requestedWidth, requestedHeight, downsampType) * sourceWidth),
+      height:round(getScale(sourceWidth, sourceHeight, requestedWidth, requestedHeight, downsampType) * sourceHeight)
+    }
+    let scaleFactor = downsampType === DownsampleStrategy.FIT_CENTER_QUALITY?
+    Math.max(1, highestOneBit(Math.max(sourceWidth / outSize.width, sourceHeight / outSize.height))) :
+    Math.max(1, highestOneBit(Math.min(sourceWidth / outSize.width, sourceHeight / outSize.height)))//将整型的缩放因子转换为2的次幂采样大小
+
+    if (downsampType === DownsampleStrategy.FIT_CENTER_MEMORY
+      && (scaleFactor < (1 / getScale(sourceWidth, sourceHeight, requestedWidth, requestedHeight, downsampType)))) {
+      scaleFactor = scaleFactor << 1;
+    }
+    return scaleFactor
+  }
+}
+
+
+/*宽高进行等比缩放宽高里面最小的比例先放进去
+然后再更据原图的缩放比去适配另一边*/
+
+export class AtLeast implements BaseDownsampling {
+  getName() {
+    return "AtLeast"
+  }
+
+  getScaleFactor(sourceWidth: number, sourceHeight: number, requestedWidth: number, requestedHeight: number): number {
+    const widthPercentage = requestedWidth / sourceWidth;
+    const heightPercentage = requestedHeight / sourceHeight;
+    //返回宽度和高度比例中最大的值
+    let outSize: Size = {
+      width: round(Math.max(widthPercentage, heightPercentage) * sourceWidth),
+      height:round(Math.max(widthPercentage, heightPercentage) * sourceHeight)
+    }
+    let scaleFactor = Math.max(1, highestOneBit(Math.max(sourceWidth / outSize.width, sourceHeight / outSize.height)))
+
+    return scaleFactor
+  }
+}
+
+/*请求尺寸大于实际尺寸不进行放大,按照原图展示*/
+
+export class AtMost implements BaseDownsampling {
+  getName() {
+    return "AtMost"
+  }
+
+
+  getScaleFactor(sourceWidth: number, sourceHeight: number, requestedWidth: number, requestedHeight: number): number {
+    const maxIntegerFactor = Math.ceil(Math.max(sourceHeight / requestedHeight, sourceWidth / requestedWidth));
+    let lesserOrEqualSampleSize = Math.max(1, highestOneBit(maxIntegerFactor));
+    let greaterOrEqualSampleSize = lesserOrEqualSampleSize
+    if (lesserOrEqualSampleSize < maxIntegerFactor) {
+      greaterOrEqualSampleSize = lesserOrEqualSampleSize <<= 1;
+    }
+    greaterOrEqualSampleSize = lesserOrEqualSampleSize << (lesserOrEqualSampleSize < maxIntegerFactor ? 1 : 0)
+
+    let outSize: Size = {
+      width: round((1 / greaterOrEqualSampleSize) * sourceWidth),
+      height:round((1 / greaterOrEqualSampleSize) * sourceHeight)
+    }
+    let scaleFactor = Math.max(1, highestOneBit(Math.min(sourceWidth / outSize.width, sourceHeight / outSize.height)))
+    if ((scaleFactor < greaterOrEqualSampleSize)) {
+      scaleFactor = scaleFactor << 1;
+    }
+    return scaleFactor
+  }
+}
+
+/*宽高进行等比缩放宽高里面最大的比例先放进去
+然后再更据原图的缩放比去适配另一边*/
+export class CenterInside implements BaseDownsampling {
+  getName() {
+    return "CenterInside"
+  }
+  getScaleFactor(sourceWidth: number, sourceHeight: number, requestedWidth: number, requestedHeight: number,
+    downsampType: DownsampleStrategy
+  ): number {
+    let outSize: Size = {
+      width: round(Math.min(1, getScale(sourceWidth, sourceHeight, requestedWidth, requestedHeight, downsampType)) * sourceWidth),
+      height:round(Math.min(1, getScale(sourceWidth, sourceHeight, requestedWidth, requestedHeight, downsampType)) * sourceHeight)
+    }
+    //将整型的缩放因子转换为2的次幂采样大小
+    let scaleFactor = this.getSampleSizeType(sourceWidth, sourceHeight, requestedWidth, requestedHeight,
+    downsampType) == SampleSizeRounding.QUALITY ?
+    Math.max(1, highestOneBit(Math.max(sourceWidth / outSize.width, sourceHeight / outSize.height))) :
+    Math.max(1, highestOneBit(Math.min(sourceWidth / outSize.width, sourceHeight / outSize.height)))
+    if (this.getSampleSizeType(sourceWidth, sourceHeight, requestedWidth, requestedHeight, downsampType)
+      == SampleSizeRounding.MEMORY  && (scaleFactor < (1 / Math.min(1, getScale(sourceWidth, sourceHeight, requestedWidth, requestedHeight, downsampType))))) {
+      scaleFactor = scaleFactor << 1;
+    }
+    return scaleFactor
+
+  }
+
+  getSampleSizeType(sourceWidth: number, sourceHeight: number, requestedWidth: number, requestedHeight: number,
+    downsampType: DownsampleStrategy
+  ): SampleSizeRounding {
+    //如果缩放因子为 1，表示没有缩放，优先选择质量
+    if (Math.min(1, getScale(sourceWidth, sourceHeight, requestedWidth, requestedHeight, downsampType)) === 1) {
+      return SampleSizeRounding.QUALITY
+    }
+    //否则，使用 FIL_CENTER 的 SampleSizeRounding 值
+    return downsampType === DownsampleStrategy.CENTER_OUTSIDE_MEMORY?SampleSizeRounding.MEMORY:SampleSizeRounding.QUALITY
+  }
+}
+
+export enum DownsampleStrategy {
+  //请求尺寸大于实际尺寸不进行放大
+  AT_MOST,
+  //两边自适应内存优先
+  FIT_CENTER_MEMORY,
+  //两边自适应质量优先
+  FIT_CENTER_QUALITY,
+  //按照宽高比的最大比进行适配内存优先
+  CENTER_OUTSIDE_MEMORY,
+  //按照宽高比的最大比进行适配质量优先
+  CENTER_OUTSIDE_QUALITY,
+  //宽高进行等比缩放宽高里面最小的比例先放进去，然后再根据原图的缩放比去适配
+  AT_LEAST,
+  //不进行降采样
+  NONE,
+}

library/src/main/ets/downsampling/DownsampleUtils.ets

@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the 'License');
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an 'AS IS' BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import { DownsampleStrategy } from './DownsampleStartegy';
+
+export enum SampleSizeRounding {
+  /**
+   * Prefer to round the sample size up so that the image is downsampled to smaller than the
+   * requested size to use less memory.
+   */
+  //（内存优先）
+  MEMORY,
+  /**
+   * Prefer to round the sample size down so that the image is downsampled to larger than the
+   * requested size to maintain quality at the expense of extra memory usage.
+   */
+  //（质量优先）
+  QUALITY
+}
+//找出给定整数 i 中最高位的1（即最左边的1）所代表的值
+export function highestOneBit(i: number): number {
+  i |= (i >> 1);
+  i |= (i >> 2);
+  i |= (i >> 4);
+  i |= (i >> 8);
+  i |= (i >> 16);
+  return i - (i >>> 1);
+}
+
+
+export function getScale(sourceWidth: number, sourceHeight: number, requestedWidth: number, requestedHeight: number,
+  downsampType: DownsampleStrategy
+): number {
+  if (downsampType === DownsampleStrategy.FIT_CENTER_MEMORY) {
+    const widthPercentage = requestedWidth / sourceWidth
+    const heightPercentage = requestedHeight / sourceHeight
+    return Math.min(widthPercentage, heightPercentage)
+  } else {
+    const maxIntegerFactor = Math.max(sourceHeight / requestedHeight, sourceWidth / requestedWidth);
+    return maxIntegerFactor === 0 ? 1 : 1 / highestOneBit(maxIntegerFactor);
+
+  }
+}
+//四舍五入
+export function  round(value: number): number {
+  return Math.floor(value + 0.5);
+}

library/src/main/ets/downsampling/Downsampler.ets

@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the 'License');
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an 'AS IS' BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import {
+  AtMost,
+  CenterInside,
+  AtLeast,
+  DownsampleStrategy,
+  FitCenter,
+} from './DownsampleStartegy';
+export class Downsampler {
+  calculateScaling(
+    typeValue: string,
+    sourceWidth: number, //原始宽高
+    sourceHeight: number, //原始宽高
+    requestWidth: number, //请求宽高
+    requestHeight: number, //请求宽高
+    downsampType: DownsampleStrategy,
+  ): Size {
+
+    if (sourceHeight <= 0 || sourceWidth <= 0) {
+      throw new Error(`Invalid width and height, sourceHeight:${sourceHeight}+ sourceWidth:${sourceWidth}`)
+    }
+    let downsampler = this.getDownsampler(downsampType);
+    let scaleFactor: number =
+      downsampler.getScaleFactor(sourceWidth, sourceHeight, requestWidth, requestHeight, downsampType);//缩放比
+    //基于上一步得出的采样大小，根据不同的图片类型，计算采样后的图片尺寸
+    if (typeValue === "png") {
+      return {
+        width: Math.floor(sourceWidth / scaleFactor),
+        height: Math.floor(sourceHeight / scaleFactor)
+      }
+    } else if (typeValue === "webp") {
+      return {
+        width: Math.round(sourceWidth / scaleFactor),
+        height: Math.round(sourceHeight / scaleFactor)
+      }
+    } else {
+      return {
+        width: sourceWidth / scaleFactor,
+        height: sourceHeight / scaleFactor
+
+      }
+    }
+  }
+  getDownsampler(downsampType: DownsampleStrategy) {
+    switch (downsampType) {
+      case DownsampleStrategy.FIT_CENTER_MEMORY:
+      case DownsampleStrategy.FIT_CENTER_QUALITY:
+        return new FitCenter();
+      case DownsampleStrategy.AT_MOST:
+        return new AtMost();
+      case DownsampleStrategy.CENTER_OUTSIDE_MEMORY:
+      case DownsampleStrategy.CENTER_OUTSIDE_QUALITY:
+        return new CenterInside();
+      case DownsampleStrategy.AT_LEAST:
+        return new AtLeast();
+      default:
+        throw new Error('Unsupported downsampling strategy');
+    }
+  }
+}

library/src/main/ets/key/DefaultEngineKey.ets

@@ -17,6 +17,7 @@ import { ImageKnifeOption } from '../model/ImageKnifeOption';
 import { IEngineKey } from './IEngineKey';
 import { PixelMapTransformation } from '../transform/PixelMapTransformation';
 import { ImageKnifeRequestSource } from '../model/ImageKnifeData';
+import { DownsampleStrategy } from '../downsampling/DownsampleStartegy';
 
 @Sendable
 export class DefaultEngineKey implements IEngineKey {
@@ -31,6 +32,9 @@ export class DefaultEngineKey implements IEngineKey {
       if (imageKnifeOption.transformation) {
         key += "transformation=" + this.getTransformation(imageKnifeOption.transformation) + ";"
       }
+      if ((imageKnifeOption.downsampleOf !== DownsampleStrategy.NONE && imageKnifeOption.downsampleOf !== undefined)) {
+        key += "downsampleOf" + imageKnifeOption.downsampleOf +"width="+width+"height="+ height
+      }
     }
     return key
   }

library/src/main/ets/model/ImageKnifeData.ets

@@ -18,6 +18,7 @@ import { IEngineKey } from '../key/IEngineKey'
 import { PixelMapTransformation } from '../transform/PixelMapTransformation'
 import common from '@ohos.app.ability.common';
 import { Size } from '@kit.ArkUI'
+import { DownsampleStrategy } from '../downsampling/DownsampleStartegy'
 
 export interface ImageKnifeData {
   source: PixelMap | string,
@@ -103,6 +104,9 @@ export interface RequestJobRequest {
   fileCacheFolder: string,
   isAnimator?: boolean,
   moduleName?:string,
-  resName?: string
+  resName?: string,
+  targetWidth: number
+  targetHeight: number
+  downsampType: DownsampleStrategy
 }
 

library/src/main/ets/model/ImageKnifeOption.ets

@@ -17,6 +17,7 @@ import common from '@ohos.app.ability.common'
 import { CacheStrategy, ImageKnifeData,EventImage } from './ImageKnifeData';
 import { PixelMapTransformation } from '../transform/PixelMapTransformation';
 import { drawing } from '@kit.ArkGraphics2D';
+import { DownsampleStrategy } from '../downsampling/DownsampleStartegy';
 
 export interface HeaderOptions {
   key: string;
@@ -90,6 +91,7 @@ interface ImageOption {
   onLoadListener?: OnLoadCallBack | undefined;
   onComplete?:(event:EventImage | undefined) => void
   drawingColorFilter?: ColorFilter | drawing.ColorFilter
+  downsampleOf?: DownsampleStrategy
 }
 @ObservedV2
 export class ImageKnifeOption {
@@ -121,6 +123,8 @@ export class ImageKnifeOption {
   onLoadListener?: OnLoadCallBack | undefined;
   onComplete?:(event:EventImage | undefined) => void
   drawingColorFilter?: ColorFilter | drawing.ColorFilter
+  // 下采样
+  @Trace downsampleOf: DownsampleStrategy = DownsampleStrategy.NONE
   constructor(option?:ImageOption) {
     this.loadSrc = option?.loadSrc == undefined ? "" : option?.loadSrc
     this.placeholderSrc = option?.placeholderSrc
@@ -141,6 +145,7 @@ export class ImageKnifeOption {
     this.onLoadListener = option?.onLoadListener
     this.onComplete = option?.onComplete
     this.drawingColorFilter = option?.drawingColorFilter
+    this.downsampleOf = option?.downsampleOf==undefined?DownsampleStrategy.NONE:option?.downsampleOf
   }
 }
 

library/src/main/ets/model/ImageKnifeRequest.ets

@@ -15,6 +15,7 @@
 import { ImageKnifeOption } from './ImageKnifeOption';
 import common from '@ohos.app.ability.common';
 import { ImageKnifeRequestSource } from './ImageKnifeData';
+import { DownsampleStrategy } from '../downsampling/DownsampleStartegy';
 
 
 export class ImageKnifeRequest {
@@ -27,18 +28,22 @@ export class ImageKnifeRequest {
   ImageKnifeRequestCallback: ImageKnifeRequestCallback
   componentVersion: number = 0
   headers: Map<string,Object> = new Map<string,Object>()
+  downsampType?: DownsampleStrategy
   constructor(option: ImageKnifeOption,
               uIAbilityContext: common.UIAbilityContext,
               width: number,
               height: number,
               version: number,
-              ImageKnifeRequestCallback: ImageKnifeRequestCallback) {
+              ImageKnifeRequestCallback: ImageKnifeRequestCallback,
+              downsampType?: DownsampleStrategy
+  ) {
     this.imageKnifeOption = option
     this.context = uIAbilityContext
     this.componentWidth = width
     this.componentHeight = height
     this.componentVersion = version
     this.ImageKnifeRequestCallback = ImageKnifeRequestCallback
+    this.downsampType = downsampType
   }
   // RequestOption调用header对于的方法
   addHeader(key: string, value: Object) {