Merge pull request #101700 from scgm0/Fix-`ViewportTexture--get_size`

Fix `ViewportTexture::get_size`

scene/main/viewport.cpp

@@ -126,7 +126,10 @@ int ViewportTexture::get_width() const {
 		_err_print_viewport_not_set();
 		return 0;
 	}
-	return get_size().width;
+	if (vp->is_sub_viewport()) {
+		return vp->size.width;
+	}
+	return vp->size.width * vp->get_stretch_transform().get_scale().width;
 }
 
 int ViewportTexture::get_height() const {
@@ -134,7 +137,10 @@ int ViewportTexture::get_height() const {
 		_err_print_viewport_not_set();
 		return 0;
 	}
-	return get_size().height;
+	if (vp->is_sub_viewport()) {
+		return vp->size.height;
+	}
+	return vp->size.height * vp->get_stretch_transform().get_scale().height;
 }
 
 Size2 ViewportTexture::get_size() const {
@@ -142,8 +148,11 @@ Size2 ViewportTexture::get_size() const {
 		_err_print_viewport_not_set();
 		return Size2();
 	}
-	float scale = MIN(vp->get_screen_transform().get_scale().width, vp->get_screen_transform().get_scale().height);
-	return Size2(vp->size.width * scale, vp->size.height * scale).ceil();
+	if (vp->is_sub_viewport()) {
+		return vp->size;
+	}
+	Size2 scale = vp->get_stretch_transform().get_scale();
+	return Size2(vp->size.width * scale.width, vp->size.height * scale.height).ceil();
 }
 
 RID ViewportTexture::get_rid() const {