@Override
HardwareLayer getHardwareLayer() {
// NOTE: Maintain these two lines very carefully (see View.java)
mPrivateFlags |= PFLAG_DRAWN | PFLAG_DRAWING_CACHE_VALID;
mPrivateFlags &= ~PFLAG_DIRTY_MASK;
if (mLayer == null) {
if (mAttachInfo == null || mAttachInfo.mHardwareRenderer == null) {
return null;
}
mLayer = mAttachInfo.mHardwareRenderer.createHardwareLayer(mOpaque);
if (!mUpdateSurface) {
// Create a new SurfaceTexture for the layer.
mSurface = mAttachInfo.mHardwareRenderer.createSurfaceTexture(mLayer);
}
mSurface.setDefaultBufferSize(getWidth(), getHeight());
nCreateNativeWindow(mSurface);
mUpdateListener =
new SurfaceTexture.OnFrameAvailableListener() {
@Override
public void onFrameAvailable(SurfaceTexture surfaceTexture) {
// Per SurfaceTexture's documentation, the callback may be invoked
// from an arbitrary thread
updateLayer();
if (Looper.myLooper() == Looper.getMainLooper()) {
invalidate();
} else {
postInvalidate();
}
}
};
mSurface.setOnFrameAvailableListener(mUpdateListener);
if (mListener != null && !mUpdateSurface) {
mListener.onSurfaceTextureAvailable(mSurface, getWidth(), getHeight());
}
mLayer.setLayerPaint(mLayerPaint);
}
if (mUpdateSurface) {
// Someone has requested that we use a specific SurfaceTexture, so
// tell mLayer about it and set the SurfaceTexture to use the
// current view size.
mUpdateSurface = false;
// Since we are updating the layer, force an update to ensure its
// parameters are correct (width, height, transform, etc.)
updateLayer();
mMatrixChanged = true;
mAttachInfo.mHardwareRenderer.setSurfaceTexture(mLayer, mSurface);
mSurface.setDefaultBufferSize(getWidth(), getHeight());
}
applyUpdate();
applyTransformMatrix();
return mLayer;
}
