api(images): images.copy(), Image(width, height)

api(canvas): canvas.toImage(), Canvas(width, height)

autojs/src/main/java/com/stardust/autojs/core/graphics/ScriptCanvas.java

@@ -26,17 +26,19 @@
 public class ScriptCanvas {
 
     private Canvas mCanvas;
+    private Bitmap mBitmap;
 
-    public ScriptCanvas(Canvas canvas) {
-        mCanvas = canvas;
+    public ScriptCanvas(int width, int height) {
+        this(Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888));
     }
 
     public ScriptCanvas(@NonNull Bitmap bitmap) {
         mCanvas = new Canvas(bitmap);
+        mBitmap = bitmap;
     }
 
     public ScriptCanvas(@NonNull ImageWrapper image) {
-        this(image.getBitmap());
+        this(image.getBitmap().copy(image.getBitmap().getConfig(), true));
     }
 
     public ScriptCanvas() {
@@ -47,6 +49,10 @@ void setCanvas(Canvas canvas) {
         mCanvas = canvas;
     }
 
+    public ImageWrapper toImage() {
+        return ImageWrapper.ofBitmap(mBitmap.copy(mBitmap.getConfig(), true));
+    }
+
     public boolean isHardwareAccelerated() {
         return mCanvas.isHardwareAccelerated();
     }

autojs/src/main/java/com/stardust/autojs/core/image/ImageWrapper.java

@@ -19,7 +19,6 @@
 /**
  * Created by Stardust on 2017/11/25.
  */
-
 public class ImageWrapper {
 
     private Mat mMat;