Fix fillcropspace param bug

Author: YumengNevix

lib/src/calculators/calculate_crop_fit_params.dart

@@ -1,3 +1,5 @@
+import 'dart:math';
+
 import 'package:custom_image_crop/src/models/params_model.dart';
 import 'package:custom_image_crop/src/widgets/custom_image_crop_widget.dart';
 
@@ -25,11 +27,11 @@ CropFitParams calculateCropFitParams({
       if (screenWidth <= screenHeight * aspectRatio) {
         cropSizeWidth = screenWidth * cropPercentage;
         cropSizeHeight = cropSizeWidth / aspectRatio;
-        defaultScale = cropSizeWidth / imageWidth;
+        defaultScale = cropSizeWidth * max(imageWidth / imageHeight, 1.0) / imageWidth;
       } else {
         cropSizeHeight = screenHeight * cropPercentage;
         cropSizeWidth = cropSizeHeight * aspectRatio;
-        defaultScale = cropSizeHeight / imageHeight;
+        defaultScale = cropSizeHeight * max(imageHeight / imageWidth, 1.0) / imageHeight;
       }
       break;
 

lib/src/calculators/calculate_on_crop_params.dart

@@ -28,15 +28,18 @@ OnCropParams caclulateOnCropParams({
 
   switch (imageFit) {
     case CustomImageFit.fillCropSpace:
+      double cropScale;
       if (screenWidth > screenHeight * aspectRatio) {
         uiSize = screenHeight;
         cropSizeMax = imageHeight.toDouble();
+        cropScale = max(cropSizeMax / imageWidth, 1.0);
       } else {
         uiSize = screenWidth;
         cropSizeMax = imageWidth.toDouble();
+        cropScale = max(cropSizeMax / imageHeight, 1.0);
       }
       translateScale = cropSizeMax / (uiSize * cropPercentage);
-      scale = dataScale;
+      scale = dataScale * cropScale;
       break;
 
     case CustomImageFit.fitCropSpace: