public void FillGradientEllipse(float x, float y, float width, float height, System.Drawing.Color[] colors)
{
// Create the radial gradient brush properties object
SharpDX.Direct2D1.RadialGradientBrushProperties radProp = new SharpDX.Direct2D1.RadialGradientBrushProperties
{
RadiusX = width,
RadiusY = height,
Center = new SharpDX.Mathematics.Interop.RawVector2(x, y)
};
// Create a list of gratiend stops
List <SharpDX.Direct2D1.GradientStop> stops = new List <SharpDX.Direct2D1.GradientStop>();
// TODO: Create a color collection that also stores the color position
// Auto calulate color position
for (int i = 0; i < colors.Length; ++i)
{
SharpDX.Direct2D1.GradientStop stop = new SharpDX.Direct2D1.GradientStop
{
Color = ToColor(colors[i]),
Position = (float)(1.0 / colors.Length) * (i + 1)
};
stops.Add(stop);
}
SharpDX.Direct2D1.GradientStopCollection radStops = new SharpDX.Direct2D1.GradientStopCollection(d2dRenderTarget, stops.ToArray());
SharpDX.Direct2D1.RadialGradientBrush rgBrush = new SharpDX.Direct2D1.RadialGradientBrush(d2dRenderTarget, ref radProp, radStops);
SharpDX.Mathematics.Interop.RawVector2 center = new SharpDX.Mathematics.Interop.RawVector2(x, y);
SharpDX.Direct2D1.Ellipse ellipse = new SharpDX.Direct2D1.Ellipse(center, width, height);
d2dRenderTarget.FillEllipse(ellipse, rgBrush);
radStops.Dispose();
rgBrush.Dispose();
}
private void OnRender()
{
lock (_renderContextLock)
{
if (_renderTarget?.IsDisposed ?? true)
{
return;
}
_renderTarget.BeginDraw();
_renderTarget.Clear(_backgroundColor);
if (_experimentStarted) // Draw blocks
{
var secsPassed = (CurrentTime - _stageUpdatedAt) / 1000.0;
switch (_paradigm)
{
case SsvepExperiment.Configuration.TestConfig.StimulationParadigm.Flicker:
foreach (var block in _blocks)
{
if (block.BorderWidth > 0)
{
_solidColorBrush.Color = _blockBorderColor;
_renderTarget.FillRectangle(block.BorderRect, _solidColorBrush);
}
if (!_trialStarted || block.Patterns == null)
{
_solidColorBrush.Color = _blockNormalColor;
}
else
{
_solidColorBrush.Color = Color.SmoothStep(_blockNormalColor, _blockFlashingColor,
(float)ConvertCosineValueToGrayScale(block.Patterns[0].Sample(secsPassed)));
}
_renderTarget.FillRectangle(block.ContentRect, _solidColorBrush);
if (block.FixationPointSize > 0)
{
_solidColorBrush.Color = _blockFixationPointColor;
_renderTarget.FillEllipse(block.CenterPointEllipse, _solidColorBrush);
}
}
break;
case SsvepExperiment.Configuration.TestConfig.StimulationParadigm.DualFlickers:
foreach (var block in _blocks)
{
if (block.BorderWidth > 0)
{
_solidColorBrush.Color = _blockBorderColor;
_renderTarget.FillRectangle(block.BorderRect, _solidColorBrush);
}
for (var i = 0; i < block.DualFlickerRects.Length; i++)
{
if (!_trialStarted || block.Patterns == null)
{
_solidColorBrush.Color = _blockNormalColor;
}
else
{
_solidColorBrush.Color = Color.SmoothStep(_blockNormalColor, _blockFlashingColor,
(float)ConvertCosineValueToGrayScale(block.Patterns[i].Sample(secsPassed)));
}
_renderTarget.FillRectangle(block.DualFlickerRects[i], _solidColorBrush);
}
if (block.FixationPointSize > 0)
{
_solidColorBrush.Color = _blockFixationPointColor;
_renderTarget.FillEllipse(block.CenterPointEllipse, _solidColorBrush);
}
}
break;
}
}
else if (!(_displayText?.IsBlank() ?? true)) // Draw text
{
_solidColorBrush.Color = _fontColor;
_renderTarget.DrawText(_displayText, _textFormat, new RawRectangleF(0, 0, Width, Height),
_solidColorBrush, SharpDX.Direct2D1.DrawTextOptions.None);
}
_renderTarget.EndDraw();
_swapChain.Present(1, SharpDX.DXGI.PresentFlags.None, _presentParameters);
}
}