/// <summary>
/// Called to process the specified <see cref="RenderStep"/>.
/// </summary>
/// <param name="step"></param>
/// <param name="drawDevice"></param>
protected virtual void OnRenderSingleStep(RenderStep step, Scene scene, DrawDevice drawDevice)
{
drawDevice.PrepareForDrawcalls();
if (step.Input == null)
{
this.CollectDrawcalls(step, scene, drawDevice);
}
else
{
drawDevice.AddFullscreenQuad(step.Input, step.InputResize);
}
drawDevice.Render();
}
/// <summary>
/// Collects drawcalls that are submitted by external sources which are
/// subscribed to <see cref="EventCollectDrawcalls"/>.
/// </summary>
protected void CollectExternalDrawcalls(RenderStep step, DrawDevice drawDevice)
{
try
{
if (this.eventCollectDrawcalls != null)
{
this.eventCollectDrawcalls(this, new CollectDrawcallEventArgs(step.Id, drawDevice));
}
}
catch (Exception e)
{
Console.WriteLine("There was an error while {0} was collecting external drawcalls: {1}", this, /*LogFormat.Exception(*/ e /*)*/);
}
}
/// <summary>
/// Collects drawcalls that are submitted by external sources which are
/// subscribed to <see cref="EventCollectDrawcalls"/>.
/// </summary>
protected void CollectExternalDrawcalls(RenderStep step, DrawDevice drawDevice)
{
Profile.TimeCollectDrawcalls.BeginMeasure();
try
{
if (this.eventCollectDrawcalls != null)
{
this.eventCollectDrawcalls(this, new CollectDrawcallEventArgs(step.Id, drawDevice));
}
}
catch (Exception e)
{
Logs.Core.WriteError("There was an error while {0} was collecting external drawcalls: {1}", this, LogFormat.Exception(e));
}
Profile.TimeCollectDrawcalls.EndMeasure();
}
/// <summary>
/// Adds an additional rendering step to <see cref="Steps"/>.
/// </summary>
/// <param name="anchorId">Id of the existing rendering step to which the new step will be anchored.</param>
/// <param name="anchorPos">Position of the new rendering step relative to the one it is anchored to.</param>
/// <param name="step">The new rendering step that should be inserted into the rendering step sequence.</param>
public void AddRenderStep(string anchorId, RenderStepPosition anchorPos, RenderStep step)
{
int anchorIndex = -1;
switch (anchorPos)
{
case RenderStepPosition.Before:
anchorIndex = this.steps.FindIndex(existingStep => existingStep.Id == anchorId);
if (anchorIndex == -1)
{
anchorIndex = 0;
}
break;
case RenderStepPosition.After:
anchorIndex = this.steps.FindIndex(existingStep => existingStep.Id == anchorId);
if (anchorIndex == -1)
{
anchorIndex = this.steps.Count;
}
else
{
anchorIndex++;
}
break;
case RenderStepPosition.First:
anchorIndex = 0;
break;
case RenderStepPosition.Last:
anchorIndex = this.steps.Count;
break;
}
if (anchorIndex != -1)
{
this.steps.Insert(anchorIndex, step);
}
}
/// <summary>
/// Collects all drawcalls from both external sources and renderers in the scene.
/// </summary>
/// <param name="step"></param>
/// <param name="scene"></param>
/// <param name="drawDevice"></param>
protected void CollectDrawcalls(RenderStep step, Scene scene, DrawDevice drawDevice)
{
this.CollectRendererDrawcalls(scene, drawDevice);
this.CollectExternalDrawcalls(step, drawDevice);
}
/// <summary>
/// Performs the specified <see cref="RenderStep"/>. This method will do some basic, localized configuration on
/// the drawing device and then invoke <see cref="OnRenderSingleStep"/> for running the actual rendering operations.
/// </summary>
/// <param name="step"></param>
/// <param name="scene"></param>
/// <param name="drawDevice"></param>
/// <param name="viewportRect"></param>
/// <param name="imageSize"></param>
/// <param name="outputTargetRect"></param>
protected void RenderSingleStep(RenderStep step, Scene scene, DrawDevice drawDevice, Rect viewportRect, Vector2 imageSize)
{
// Memorize old draw device settings to reset them later
VisibilityFlag oldDeviceMask = drawDevice.VisibilityMask;
ColorRgba oldDeviceClearColor = drawDevice.ClearColor;
ContentRef <RenderTarget> oldDeviceTarget = drawDevice.Target;
Rect localViewport;
Vector2 localTargetSize;
ContentRef <RenderTarget> renderTarget;
// If this step is using a custom render target, override image and viewport sizes
if (step.Output.IsAvailable)
{
renderTarget = step.Output;
localTargetSize = step.Output.Res.Size;
localViewport = new Rect(step.Output.Res.Size);
}
// Otherwise, use the provided parameter values
else
{
renderTarget = oldDeviceTarget;
localTargetSize = imageSize;
localViewport = viewportRect;
}
// Regardless of rendering targets, adjust the local render size and viewport
// according to the rendering step target rect
localViewport.Pos += localViewport.Size * step.TargetRect.Pos;
localViewport.Size *= step.TargetRect.Size;
localTargetSize *= step.TargetRect.Size;
// Set up the draw device with rendering step settings
drawDevice.RenderMode = step.MatrixMode;
drawDevice.Target = renderTarget;
drawDevice.TargetSize = localTargetSize;
drawDevice.ViewportRect = localViewport;
drawDevice.ClearFlags = step.ClearFlags;
drawDevice.ClearColor = step.DefaultClearColor ? oldDeviceClearColor : step.ClearColor;
drawDevice.ClearDepth = step.ClearDepth;
// ScreenOverlay is a special flag that is set on a per-rendering-step basis
// and that shouldn't be affected by overall device settings. Keep it separate.
drawDevice.VisibilityMask =
(drawDevice.VisibilityMask & step.VisibilityMask & ~VisibilityFlag.ScreenOverlay) |
(step.VisibilityMask & VisibilityFlag.ScreenOverlay);
try
{
this.OnRenderSingleStep(step, scene, drawDevice);
}
catch (Exception e)
{
Console.WriteLine("There was an error while {0} was processing rendering step '{1}': {2}", this, step.Id, /*LogFormat.Exception(*/ e /*)*/);
}
// Restore old draw device state
drawDevice.VisibilityMask = oldDeviceMask;
drawDevice.ClearColor = oldDeviceClearColor;
drawDevice.Target = oldDeviceTarget;
}
/// <summary>
/// Adds an additional rendering step to <see cref="Steps"/>.
/// </summary>
/// <param name="anchorPos">Position of the new rendering step relative to the one it is anchored to.</param>
/// <param name="step">The new rendering step that should be inserted into the rendering step sequence.</param>
public void AddRenderStep(RenderStepPosition anchorPos, RenderStep step)
{
this.AddRenderStep(null, anchorPos, step);
}