【修复】旋转

@@ -255,6 +255,12 @@ class IProcessingCameraImage implements ProcessingCameraImage {
     }
     rotationAngle ??= 0;
 
+    double rad =
+    (rotationAngle * 3.14159265358979323846264338327950288 / 180.0);
+    double sinVal = sin(rad).abs();
+    double cosVal = cos(rad).abs();
+    int newImgWidth = (sinVal * height + cosVal * width).toInt();
+    int newImgHeight = (sinVal * width + cosVal * height).toInt();
 
     Pointer<Uint8> p = ffi.malloc.allocate(plane0.length);
 
@@ -263,19 +269,19 @@ class IProcessingCameraImage implements ProcessingCameraImage {
 
     Pointer<Uint32> imgP = _convertImageNV21ToRGB(
       p,
-      width,
-      height,
+      newImgWidth,
+      newImgHeight,
       rotationAngle,
       backGroundColor,
       isFlipVectical,
       isFlipHoriozntal,
     );
 
-    final imgData = imgP.asTypedList(width * height);
+    final imgData = imgP.asTypedList(newImgWidth * newImgHeight);
     imglib.Image img = imglib.Image.fromBytes(
         bytes: imgData.buffer,
-        width: width,
-        height: height,
+        width: newImgWidth,
+        height: newImgHeight,
         order: imglib.ChannelOrder.rgba);
 
     ffi.malloc.free(p);