protected override void RenderClientContent(DrawBoard d, UpdateArea updateArea)
{
//TODO: review here,
if (_myHtmlVisualRoot == null)
{
return;
}
bool useBackbuffer = d.IsGpuDrawBoard;
//useBackbuffer = false;
//... TODO: review here, check doc update here?
_myHtmlVisualRoot.CheckDocUpdate();
if (useBackbuffer)
{
PaintVisitor painter = PaintVisitorStock.GetSharedPaintVisitor(_myHtmlVisualRoot, d);
if (_builtInBackBuffer == null)
{
_builtInBackBuffer = painter.CreateOffscreenDrawBoard(this.Width, this.Height);
}
#if DEBUG
painter.dbugDrawDiagonalBox(Color.Blue, this.X, this.Y, this.Width, this.Height);
#endif
if (!_builtInBackBuffer.IsValid)
{
//painter.FillRectangle(Color.Red, 0, 0, 100, 100);//debug
//painter.DrawText(i.ToString().ToCharArray(), 0, 1, new PointF(0, 0), new SizeF(100, 100)); //debug
float backupViewportW = painter.ViewportWidth; //backup
float backupViewportH = painter.ViewportHeight; //backup
painter.EnterNewDrawboardBuffer(_builtInBackBuffer); //*** switch to builtInBackbuffer
painter.SetViewportSize(this.Width, this.Height);
if (!_hasAccumRect)
{
_invalidateRect = new Rectangle(0, 0, Width, Height);
}
#if DEBUG
//System.Diagnostics.Debug.WriteLine("inv_rect:" + _invalidateRect + "," + painter.ToString());
#endif
if (painter.PushLocalClipArea(
_invalidateRect.Left, _invalidateRect.Top,
_invalidateRect.Width, _invalidateRect.Height))
{
#if DEBUG
//for debug , test clear with random color
//another useful technique to see latest clear area frame-by-frame => use random color
//painter.Clear(ColorEx.dbugGetRandomColor());
painter.Clear(Color.White);
#else
painter.Clear(Color.White);
#endif
_myHtmlVisualRoot.PerformPaint(painter);
painter.PopLocalClipArea();
}
//
_builtInBackBuffer.IsValid = true;
_hasAccumRect = false;
painter.ExitCurrentDrawboardBuffer(); //*** switch back
painter.SetViewportSize(backupViewportW, backupViewportH); //restore viewport size
}
painter.DrawImage(_builtInBackBuffer.GetImage(), 0, 0, this.Width, this.Height);
PaintVisitorStock.ReleaseSharedPaintVisitor(painter);
}
#if DEBUG
else if (dbugPreferSoftwareRenderer && d.IsGpuDrawBoard)
{
//TODO: review this again ***
//test built-in 'shared' software rendering surface
DrawBoard cpuDrawBoard = null;
if ((cpuDrawBoard = d.GetCpuBlitDrawBoard()) != null)
{
cpuDrawBoard.Clear(Color.White);
PaintVisitor painter = PaintVisitorStock.GetSharedPaintVisitor(_myHtmlVisualRoot, cpuDrawBoard);
painter.SetViewportSize(this.Width, this.Height);
#if DEBUG
painter.dbugDrawDiagonalBox(Color.Blue, this.X, this.Y, this.Width, this.Height);
#endif
_myHtmlVisualRoot.PerformPaint(painter);
PaintVisitorStock.ReleaseSharedPaintVisitor(painter);
//then copy from cpu to gpu
d.BlitFrom(cpuDrawBoard, X, Y, this.Width, this.Height, 0, 0);
}
}
#endif
else
{
PaintVisitor painter = PaintVisitorStock.GetSharedPaintVisitor(_myHtmlVisualRoot, d);
painter.SetViewportSize(this.Width, this.Height);
#if DEBUG
//System.Diagnostics.Debug.WriteLine(">> 500x500");
painter.dbugDrawDiagonalBox(Color.Blue, this.X, this.Y, this.Width, this.Height);
//for debug , test clear with random color
//another useful technique to see latest clear area frame-by-frame => use random color
//painter.Clear(Color.FromArgb(255, dbugRandom.Next(0, 255), dbugRandom.Next(0, 255), dbugRandom.Next(0, 255)));
#endif
#if DEBUG
//System.Diagnostics.Debug.WriteLine("inv_rect:" + _invalidateRect + "," + painter.ToString());
#endif
//painter.SetClipRect(new Rectangle(0, 0, 200, 200));
_myHtmlVisualRoot.PerformPaint(painter);
#if DEBUG
//System.Diagnostics.Debug.WriteLine("<< 500x500");
//painter.dbugDrawDiagonalBox(Color.Blue, this.X, this.Y, this.Width, this.Height);
#endif
PaintVisitorStock.ReleaseSharedPaintVisitor(painter);
}
}