/// <summary>
/// This is the standard RenderMessageHandler callback, posted via PostRender()
/// and Resize(). This wraps RenderMessageHandlerCore and emits an ETW events
/// to trace its execution.
/// </summary>
internal object RenderMessageHandler(object arg)
{
try
{
_isRendering = true;
//_screen.Clear();
if (_invokeOnRenderCallbacks != null)
{
int callbackLoopCount = 0;
int count = _invokeOnRenderCallbacks.Count;
while (count > 0)
{
callbackLoopCount++;
if (callbackLoopCount > 153)
{
throw new InvalidOperationException("infinite loop");
}
InvokeOnRenderCallback[] callbacks;
lock (_invokeOnRenderCallbacks)
{
count = _invokeOnRenderCallbacks.Count;
callbacks = new InvokeOnRenderCallback[count];
_invokeOnRenderCallbacks.CopyTo(callbacks);
_invokeOnRenderCallbacks.Clear();
}
for (int i = 0; i < count; i++)
{
callbacks[i].DoWork();
}
count = _invokeOnRenderCallbacks.Count;
}
}
DrawingContext dc = new DrawingContext(_screen);
/* The dirty rectange MUST be read after the InvokeOnRender callbacks are
* complete, as they can trigger layout changes or invalidate controls
* which are expected to be redrawn. */
int x = _dirtyX0;
int y = _dirtyY0;
int w = _dirtyX1 - _dirtyX0;
int h = _dirtyY1 - _dirtyY0;
_dirtyX0 = _screenW; _dirtyY0 = _screenH;
_dirtyX1 = _dirtyY1 = 0;
try
{
if (w > 0 && h > 0)
{
//
// This is the big Render!
//
// We've now updated layout and the updated scene will be
// rendered.
dc.PushClippingRectangle(x, y, w, h);
_target.RenderRecursive(dc);
dc.PopClippingRectangle();
}
}
finally
{
dc.Close();
if (w > 0 && h > 0)
{
_screen.Flush(x, y, w, h);
}
}
}
finally
{
_currentRenderOp = null;
_isRendering = false;
}
return null;
}
/// <summary>
/// This is the standard RenderMessageHandler callback, posted via PostRender()
/// and Resize(). This wraps RenderMessageHandlerCore and emits an ETW events
/// to trace its execution.
/// </summary>
internal object RenderMessageHandler(object arg)
{
try
{
_isRendering = true;
//_screen.Clear();
if (_invokeOnRenderCallbacks != null)
{
int callbackLoopCount = 0;
int count = _invokeOnRenderCallbacks.Count;
while (count > 0)
{
callbackLoopCount++;
if (callbackLoopCount > 153)
{
throw new InvalidOperationException("infinite loop");
}
InvokeOnRenderCallback[] callbacks;
lock (_invokeOnRenderCallbacks)
{
count = _invokeOnRenderCallbacks.Count;
callbacks = new InvokeOnRenderCallback[count];
_invokeOnRenderCallbacks.CopyTo(callbacks);
_invokeOnRenderCallbacks.Clear();
}
for (int i = 0; i < count; i++)
{
callbacks[i].DoWork();
}
count = _invokeOnRenderCallbacks.Count;
}
}
DrawingContext dc = new DrawingContext(_screen);
/* The dirty rectange MUST be read after the InvokeOnRender callbacks are
* complete, as they can trigger layout changes or invalidate controls
* which are expected to be redrawn. */
int x = _dirtyX0;
int y = _dirtyY0;
int w = _dirtyX1 - _dirtyX0;
int h = _dirtyY1 - _dirtyY0;
_dirtyX0 = _screenW; _dirtyY0 = _screenH;
_dirtyX1 = _dirtyY1 = 0;
try
{
if (w > 0 && h > 0)
{
//
// This is the big Render!
//
// We've now updated layout and the updated scene will be
// rendered.
dc.PushClippingRectangle(x, y, w, h);
_target.RenderRecursive(dc);
dc.PopClippingRectangle();
}
}
finally
{
dc.Close();
if (w > 0 && h > 0)
{
_screen.Flush(x, y, w, h);
}
}
}
finally
{
_currentRenderOp = null;
_isRendering = false;
}
return(null);
}