/// <summary>
/// Initializes the control.
/// </summary>
protected override void OnCreateControl()
{
// Don't initialize the graphics device if we are running in the designer.
if(!DesignMode)
{
_graphicsDeviceService = GraphicsDeviceService.AddRef(Handle,
ClientSize.Width,
ClientSize.Height);
Services.AddService<IGraphicsDeviceService>(_graphicsDeviceService);
_renderTarget = new SwapChainRenderTarget(GraphicsDevice, Handle, ClientSize.Width, ClientSize.Height);
// Register the service, so components like ContentManager can find it.
//services.AddService<IGraphicsDeviceService>(graphicsDeviceService);
// Give derived classes a chance to initialize themselves.
Initialize();
//Set the XNA mouse handing to use this window
//Mouse.WindowHandle = Handle;
return;
}
base.OnCreateControl();
}
/// <summary>
/// Helper used by BeginDraw. This checks the graphics device status,
/// making sure it is big enough for drawing the current control, and
/// that the device is not lost. Returns an error string if the device
/// could not be reset.
/// </summary>
string HandleDeviceReset()
{
bool deviceNeedsReset = false;
switch (GraphicsDevice.GraphicsDeviceStatus)
{
case GraphicsDeviceStatus.Lost:
// If the graphics device is lost, we cannot use it at all.
return "Graphics device lost";
case GraphicsDeviceStatus.NotReset:
// If device is in the not-reset state, we should try to reset it.
deviceNeedsReset = true;
break;
default:
// If the device state is ok, check whether it is big enough.
PresentationParameters pp = GraphicsDevice.PresentationParameters;
deviceNeedsReset = (ClientSize.Width != pp.BackBufferWidth) ||
(ClientSize.Height != pp.BackBufferHeight);
break;
}
// Do we need to reset the device?
if (deviceNeedsReset)
{
try
{
//graphicsDeviceService.ResetDevice(ClientSize.Width,
//ClientSize.Height);
graphicsDeviceService.ResetDevice(_renderTarget.Width, _renderTarget.Height);
_renderTarget.Dispose();
_renderTarget = new SwapChainRenderTarget(GraphicsDevice, Handle, ClientSize.Width, ClientSize.Height);
}
catch (Exception e)
{
return "Graphics device reset failed\n\n" + e;
}
}
return null;
}
/// <summary>
/// Disposes the control.
/// </summary>
protected override void Dispose(bool disposing)
{
if (graphicsDeviceService != null)
{
graphicsDeviceService.Release(disposing);
graphicsDeviceService = null;
}
if (_renderTarget != null) {
_renderTarget.Dispose();
_renderTarget = null;
}
base.Dispose(disposing);
}
/// <inheritdoc/>
bool IPresentationTarget.BeginRender(RenderContext context)
{
if (context == null)
throw new ArgumentNullException("context");
var graphicsDevice = GraphicsService.GraphicsDevice;
int width = ClientSize.Width;
int height = ClientSize.Height;
#if MONOGAME
if (_renderTarget == null
|| _renderTarget.GraphicsDevice != graphicsDevice
|| _renderTarget.Width != width
|| _renderTarget.Height != height)
{
if (_renderTarget == null)
_renderTarget = new SwapChainRenderTarget(graphicsDevice, Handle, width, height);
else
_renderTarget.Resize(width, height);
}
graphicsDevice.SetRenderTarget(_renderTarget);
context.RenderTarget = _renderTarget;
#else
bool deviceNeedsReset;
switch (graphicsDevice.GraphicsDeviceStatus)
{
case GraphicsDeviceStatus.Lost:
return false;
case GraphicsDeviceStatus.NotReset:
deviceNeedsReset = true;
break;
default:
var presentationParameters = graphicsDevice.PresentationParameters;
deviceNeedsReset = (width > presentationParameters.BackBufferWidth)
|| (height > presentationParameters.BackBufferHeight);
break;
}
if (deviceNeedsReset)
{
try
{
var presentationParameters = graphicsDevice.PresentationParameters;
presentationParameters.BackBufferWidth = Math.Max(width, presentationParameters.BackBufferWidth);
presentationParameters.BackBufferHeight = Math.Max(height, presentationParameters.BackBufferHeight);
graphicsDevice.Reset(presentationParameters);
}
catch (Exception)
{
return false;
}
}
#endif
context.Viewport = new Viewport(0, 0, width, height);
_rendering = true;
return true;
}
void RemakeTarget()
{
//const int step = 64;
if (target == null || target.Width != ClientSize.Width || target.Height != ClientSize.Height) {
if (target != null) target.Dispose();
int width = ClientSize.Width; //(int)Math.Ceiling((float)ClientSize.Width / step) * step;
int height = ClientSize.Height; //(int)Math.Ceiling((float)ClientSize.Height / step) * step;
target = new SwapChainRenderTarget(GraphicsManager.device, Handle, width, height, false, SurfaceFormat.Color, DepthFormat.Depth24, 0, RenderTargetUsage.PreserveContents, PresentInterval.Default);
frame.canvas = new Canvas(target);
}
}
/// <inheritdoc/>
bool IPresentationTarget.BeginRender(RenderContext context)
{
if (context == null)
throw new ArgumentNullException("context");
var graphicsDevice = GraphicsService.GraphicsDevice;
if (_renderTarget == null
|| _renderTarget.GraphicsDevice != graphicsDevice
|| _requiresResize)
{
if (_renderTarget == null)
{
_renderTarget = new SwapChainRenderTarget(
graphicsDevice,
this,
_width,
_height,
_compositionScaleX,
_compositionScaleY,
false,
SurfaceFormat.Color,
DepthFormat.Depth24Stencil8,
0,
RenderTargetUsage.PreserveContents,
PresentInterval.Default);
}
else
{
_renderTarget.Resize(_width, _height, _compositionScaleX, _compositionScaleY);
}
_requiresResize = false;
}
graphicsDevice.SetRenderTarget(_renderTarget);
context.RenderTarget = _renderTarget;
context.Viewport = new Viewport(0, 0, _renderTarget.Width, _renderTarget.Height);
_rendering = true;
return true;
}
private void RemoveRenderTarget()
{
lock (Lock ?? _dummyLock)
{
_renderTarget.SafeDispose();
_renderTarget = null;
}
}
