支持多种组合变换

Signed-off-by: zhang_hanyong <zhang_hanyong@h-partners.com>

library/src/main/ets/components/imageknife/requestmanage/RequestManager.ets

@@ -33,7 +33,9 @@ import { GIFFrame } from '../utils/gif/GIFFrame'
 import { LogUtil } from '../../imageknife/utils/LogUtil'
 import { BusinessError } from '@ohos.base'
 import { DataFetchResult } from '../networkmanage/DataFetchResult'
+import { BaseTransform } from '../transform/BaseTransform'
 
+const imagePackerApi = image.createImagePacker();
 
 export enum Stage {
 
@@ -173,16 +175,7 @@ export class RequestManager {
         this.svgProcess(request, onComplete, onError, arrayBuffer, typeValue)
       } else {
         if (request.transformations[0]) {
-          request.transformations[0].transform(arrayBuffer, request, {
-            asyncTransform: (error: BusinessError | string, pixelMap: PixelMap | null) => {
-              // 输出给Image
-              if (pixelMap) {
-                onComplete(pixelMap);
-              } else {
-                onError(error);
-              }
-            }
-          })
+          this.getTransformImage(request, arrayBuffer, request.transformations, 0, onComplete, onError);
         }
         else {
           let success = (value: PixelMap) => {
@@ -201,6 +194,60 @@ export class RequestManager {
 
   }
 
+  private getTransformImage(request: RequestOption, source: ArrayBuffer, transformations: Array<BaseTransform<PixelMap>>, index: number,
+                            onComplete: (value: PixelMap | GIFFrame[]) => void | PromiseLike<ImageKnifeData>, onError: (reason?: BusinessError | string) => void) {
+    transformations[index].transform(source, request, {
+      asyncTransform: (error: BusinessError | string, pixelMap: PixelMap | null) => {
+        // 输出给Image
+        if (pixelMap) {
+          if (index == request.transformations.length - 1) {
+            onComplete(pixelMap)
+          } else {
+            let packOpts: image.PackingOption = { format: "image/png", quality: 98 };
+            imagePackerApi.packing(pixelMap, packOpts).then((data: ArrayBuffer) => {
+              // data 为打包获取到的文件流，写入文件保存即可得到一张图片
+              index++;
+              this.getTransformImage(request, data, transformations, index, onComplete, onError);
+            }).catch((error: BusinessError) => {
+              onError(error);
+              console.error('requestManager Failed to pack the image. And the error is: ' + JSON.stringify(error));
+            })
+          }
+        } else {
+          onError(error);
+          console.error('requestManager getTransformImage error! ' + JSON.stringify(error));
+        }
+      }
+    })
+  }
+
+  private saveTransformImage(request: RequestOption, source: ArrayBuffer, transformations: Array<BaseTransform<PixelMap>>, index: number, filetype: string,
+                             onComplete: (value: PixelMap) => void | PromiseLike<ImageKnifeData>, onError: (reason?: BusinessError | string) => void) {
+    transformations[index].transform(source, request, {
+      asyncTransform: (error: BusinessError | string, pixelMap: PixelMap | null) => {
+        // 输出给Image
+        if (pixelMap) {
+          if (index == request.transformations.length - 1) {
+            this.saveCacheAndDisk(pixelMap, filetype, onComplete, source);
+          } else {
+            let packOpts: image.PackingOption = { format: "image/png", quality: 98 };
+            imagePackerApi.packing(pixelMap, packOpts).then((data: ArrayBuffer) => {
+              // data 为打包获取到的文件流，写入文件保存即可得到一张图片
+              index++;
+              this.saveTransformImage(request, data, transformations, index, filetype, onComplete, onError);
+            }).catch((error: BusinessError) => {
+              onError(error);
+              console.error('requestManager Failed to pack the image. And the error is: ' + JSON.stringify(error));
+            })
+          }
+        } else {
+          onError(error);
+          console.error('requestManager saveTransformImage error! ' + JSON.stringify(error));
+        }
+      }
+    })
+  }
+
   // 加载磁盘缓存 原图
   private loadDiskFromSource(request: RequestOption, onComplete: (value: PixelMap | GIFFrame[]) => void | PromiseLike<ImageKnifeData>, onError: (reason?: BusinessError | string) => void) {
     LogUtil.log("ImageKnife RequestManager loadDiskFromSource")
@@ -286,37 +333,13 @@ export class RequestManager {
           }
           let thumbCallback = this.options.thumbholderOnComplete;
           let thumbError = this.options.thumbholderOnError;
-          this.options.transformations[0].transform(source, thumbOption, {
-            asyncTransform: (error: BusinessError | string, pixelMap: PixelMap | null) => {
-              if (pixelMap) {
-                thumbCallback(pixelMap);
-              } else {
-                thumbError(error);
-              }
-            }
-          })
+          this.getTransformImage(thumbOption, source, this.options.transformations, 0, thumbCallback, thumbError);
           setTimeout(() => {
-            this.options.transformations[0].transform(source, request, {
-              asyncTransform: (error: BusinessError | string, pixelMap: PixelMap | null) => {
-                if (pixelMap) {
-                  onComplete(pixelMap);
-                } else {
-                  onError(error);
-                }
-              }
-            })
+            this.getTransformImage(request, source, this.options.transformations, 0, onComplete, onError);
           }, this.options.thumbDelayTime);
         }
         else {
-          this.options.transformations[0].transform(source, request, {
-            asyncTransform: (error: BusinessError | string, pixelMap: PixelMap | null) => {
-              if (pixelMap) {
-                onComplete(pixelMap);
-              } else {
-                onError(error);
-              }
-            }
-          })
+          this.getTransformImage(request, source, this.options.transformations, 0, onComplete, onError);
         }
       } else {
         // thumbnail 缩略图部分
@@ -427,17 +450,7 @@ export class RequestManager {
             this.thumbnailProcess(source, filetype, onComplete, onError);
           }
         } else {
-          this.options.transformations[0].transform(source, this.options, {
-            asyncTransform: (error: BusinessError | string, pixelMap: PixelMap | null) => {
-              if (pixelMap) {
-                if (filetype != null) {
-                  this.saveCacheAndDisk(pixelMap, filetype, onComplete, source);
-                }
-              } else {
-                onError(error);
-              }
-            }
-          })
+          this.saveTransformImage(this.options, source, this.options.transformations, 0, filetype, onComplete, onError);
         }
       } else {
         // thumbnail 缩略图部分
@@ -507,25 +520,9 @@ export class RequestManager {
     })
     let thumbCallback = this.options.thumbholderOnComplete
     let thumbError = this.options.thumbholderOnError
-    this.options.transformations[0].transform(source, thumbOption, {
-      asyncTransform: (error: BusinessError | string, pixelMap: PixelMap | null) => {
-        if (pixelMap) {
-          thumbCallback(pixelMap);
-        } else {
-          thumbError(error);
-        }
-      }
-    })
+    this.getTransformImage(thumbOption, source, this.options.transformations, 0, thumbCallback, thumbError);
     setTimeout(() => {
-      this.options.transformations[0].transform(source, this.options, {
-        asyncTransform: (error: BusinessError | string, pixelMap: PixelMap | null) => {
-          if (pixelMap) {
-            this.saveCacheAndDisk(pixelMap, filetype, onComplete, source);
-          } else {
-            onError(error);
-          }
-        }
-      })
+      this.saveTransformImage(this.options, source, this.options.transformations, 0, filetype, onComplete, onError);
     }, this.options.thumbDelayTime)
   }