/**
* Called by subclass to service a rendering request. If REASON_RENDER (and when
* REASON_REPLACE/RESIZE triggers a render) this doesn't actually do rendering but returns true.
* This prevents potentially lengthy rendering from blocking the requester.
*
* @return Whether calling subclass should perform a render.
* @throws IOException
*/
protected synchronized boolean serviceRenderRequest() {
boolean rendering = false;
try {
switch (mRenderReason) {
case REASON_INIT:
mWidth = getCurrentScreenWidth();
mHeight = getCurrentScreenHeight();
if (null != mRenderer) {
mRenderer.initRendering(this, mWidth, mHeight);
mReady = true;
notifyAll();
rendering = true;
}
break;
case REASON_DISPOSE:
mReady = false;
if (null != mRenderer) mRenderer.deleteRendering(this);
break;
case REASON_RESIZE:
int w = getCurrentScreenWidth();
int h = getCurrentScreenHeight();
if (w != mWidth || h != mHeight) {
mWidth = w;
mHeight = h;
if (null != mRenderer) {
mRenderer.resizeRendering(this, w, h);
rendering = mRendering;
}
}
break;
case REASON_RENDER:
rendering = true;
break;
case REASON_REPLACE:
if (null != mRenderer) mRenderer.replacingRenderer(this);
mRenderer = mNewRenderer;
mNewRenderer = null;
if (null != mRenderer) {
mRenderer.replacedRenderer(this);
rendering = mRendering;
}
break;
}
mRendering = rendering;
if (mRenderBlocking) {
notifyAll();
mRenderBlocking = false;
}
} catch (Throwable e) {
rendering = false;
Log.e(TAG, "Exception in RenderContext", e);
}
return rendering;
}
