io.flutter.plugin.platform.ImageReaderPlatformViewRenderTargetTest Class Reference

Classes
class	TestImageTextureEntry

Public Member Functions
void	viewDraw_writesToBuffer ()

Detailed Description

Definition at line 30 of file ImageReaderPlatformViewRenderTargetTest.java.

Member Function Documentation

viewDraw_writesToBuffer()

void io.flutter.plugin.platform.ImageReaderPlatformViewRenderTargetTest.viewDraw_writesToBuffer ( )

inline

Definition at line 61 of file ImageReaderPlatformViewRenderTargetTest.java.

                                        {
    final TestImageTextureEntry textureEntry = new TestImageTextureEntry();
    final ImageReaderPlatformViewRenderTarget renderTarget =
        new ImageReaderPlatformViewRenderTarget(textureEntry);
    // Custom view.
    final View platformView =
        new View(ctx) {
          @Override
          public void draw(Canvas canvas) {
            super.draw(canvas);
            canvas.drawColor(Color.RED);
          }
        };
    final int size = 100;
    platformView.measure(size, size);
    platformView.layout(0, 0, size, size);
    renderTarget.resize(size, size);
 
    // We don't have an image in the texture entry.
    assertNull(textureEntry.acquireLatestImage());
 
    // Start rendering a frame.
    final Surface s = renderTarget.getSurface();
    assertNotNull(s);
    final Canvas targetCanvas = s.lockHardwareCanvas();
    assertNotNull(targetCanvas);
 
    try {
      // Fill the render target with transparent pixels. This is needed for platform views that
      // expect a transparent background.
      targetCanvas.drawColor(Color.TRANSPARENT, PorterDuff.Mode.CLEAR);
      // Override the canvas that this subtree of views will use to draw.
      platformView.draw(targetCanvas);
    } finally {
      // Finish rendering a frame.
      s.unlockCanvasAndPost(targetCanvas);
    }
 
    // Pump the UI thread task loop. This is needed so that the OnImageAvailable callback
    // gets invoked (resulting in textureEntry.pushImage being invoked).
    shadowOf(getMainLooper()).idle();
 
    // An image was pushed into the texture entry and it has the correct dimensions.
    Image pushedImage = textureEntry.acquireLatestImage();
    assertNotNull(pushedImage);
    assertEquals(pushedImage.getWidth(), size);
    assertEquals(pushedImage.getHeight(), size);
  }

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The documentation for this class was generated from the following file:

• shell/platform/android/test/io/flutter/plugin/platform/ImageReaderPlatformViewRenderTargetTest.java