/**
* Update the texture if the native WebView window has changed.
*
* @param dc Draw context
*/
@Override
protected void updateIfNeeded(DrawContext dc) {
// Return immediately if the native WebViewWindow object isn't initialized, and wait to update
// until the
// native object is initialized. This method is called after the texture is bound, so we'll
// get another
// chance to update as long as the WebView generates repaint events when it changes.
long webViewWindowPtr = WindowsWebView.this.webViewWindowPtr;
if (webViewWindowPtr == 0) return;
// Return immediately if the texture isn't in the texture cache, and wait to update until the
// texture is
// initialized and placed in the cache. This method is called after the texture is bound, so
// we'll get
// another chance to update as long as the WebView generates repaint events when it changes.
Texture texture = this.getTextureFromCache(dc);
if (texture == null) return;
// Load the WebViewWindow's current display pixels into the currently bound OGL texture if our
// update time
// is different than the WebViewWindow's update time.
long newUpdateTime = WindowsWebViewJNI.getUpdateTime(webViewWindowPtr);
if (newUpdateTime != this.updateTime) {
WindowsWebViewJNI.loadDisplayInGLTexture(webViewWindowPtr, texture.getTarget());
this.updateTime = newUpdateTime;
}
}
