fix: enable HWAcc on android >= 28 by default

Author: farfromrefug

Diff for: src/canvas.android.ts

@@ -29,7 +29,13 @@ export {
     PorterDuffXfermode,
 };
 
-const isPostLVar = lazy(() => android.os.Build.VERSION.SDK_INT >= 24);
+let SDK_INT = -1;
+function getSDK() {
+    if (SDK_INT === -1) {
+        SDK_INT = android.os.Build.VERSION.SDK_INT;
+    }
+    return SDK_INT;
+}
 
 function createArrayBuffer(length: number, useInts = false) {
     let bb: java.nio.ByteBuffer;
@@ -461,7 +467,7 @@ export class StaticLayout {
         if (!(text instanceof java.lang.CharSequence) && !(typeof text === 'string')) {
             text = text + '';
         }
-        if (isPostLVar()) {
+        if (getSDK() >=24) {
             this._native = android.text.StaticLayout.Builder.obtain(
                 text,
                 0,
@@ -555,12 +561,21 @@ class CanvasView extends CanvasBase {
     }
     nativeViewProtected: com.akylas.canvas.CanvasView;
     createNativeView() {
-        // initAndroidCanvasViewClass();
         const view = new com.akylas.canvas.CanvasView(this._context);
-        // const view = new NativeCanvasView(this._context, this);
-        view.setLayerType(android.view.View.LAYER_TYPE_HARDWARE, null);
+        if (getSDK() >= 28) {
+            view.setLayerType(android.view.View.LAYER_TYPE_HARDWARE, null);
+        } else {
+            view.setLayerType(android.view.View.LAYER_TYPE_SOFTWARE, null);
+        }
         return view;
     }
+    [hardwareAcceleratedProperty.getDefault](value) {
+        if (getSDK() >= 28) {
+            return true;
+        } else {
+            return false;
+        }
+    }
 
     [hardwareAcceleratedProperty.setNative](value) {
         this.nativeViewProtected.setLayerType(value ? android.view.View.LAYER_TYPE_HARDWARE : android.view.View.LAYER_TYPE_SOFTWARE, null);

Diff for: src/canvas.common.ts

@@ -17,10 +17,11 @@ export function createRectF(x: number, y: number, w: number, h: number) {
     return new RectF(x, y, x + w, y + h);
 }
 
+export const DEFAULT_SCALE = Screen.mainScreen.scale;
 export const cachedProperty = new Property<CanvasBase, boolean>({ name: 'cached', defaultValue: false, valueConverter: booleanConverter });
-export const hardwareAcceleratedProperty = new Property<CanvasBase, boolean>({ name: 'hardwareAccelerated', defaultValue: true, valueConverter: booleanConverter });
+export const hardwareAcceleratedProperty = new Property<CanvasBase, boolean>({ name: 'hardwareAccelerated', valueConverter: booleanConverter });
 export const callDrawBeforeShapesProperty = new Property<CanvasBase, boolean>({ name: 'callDrawBeforeShapes', defaultValue: false, valueConverter: booleanConverter });
-export const densityProperty = new Property<CanvasBase, number>({ name: 'density', valueConverter: parseFloat });
+export const densityProperty = new Property<CanvasBase, number>({ name: 'density', defaultValue:DEFAULT_SCALE, valueConverter: parseFloat });
 
 function throttle(fn, limit) {
     let waiting = false;
@@ -34,7 +35,6 @@ function throttle(fn, limit) {
         }
     };
 }
-export const DEFAULT_SCALE = Screen.mainScreen.scale;
 export abstract class CanvasBase extends View {
     protected _shapes: ObservableArray<Shape>;
 
@@ -43,9 +43,9 @@ export abstract class CanvasBase extends View {
     get shapes() {
         return this._shapes;
     }
-    public cached = false;
-    public density = DEFAULT_SCALE;
-    public hardwareAccelerated = true;
+    public cached;
+    public density;
+    public hardwareAccelerated ;
 
     drawFameRate = false;