/// <summary>
/// Executes a SAS script block
/// </summary>
/// <param name="script">A list of script commands</param>
/// <param name="render">The render delegate (is called once for every shader pass); <c>null</c> for global script</param>
/// <param name="sceneSize">The size of the scene on the screen - leave empty for fullscreen</param>
/// <param name="sceneMap">A texture containing the rendered scene for <see cref="PostShader"/>), <c>null</c> if the shader doesn't need it</param>
/// <param name="passScipt">Is this a pass script?</param>
protected void ExecuteScript(IEnumerable <SasScriptCommand> script, Action render, Size sceneSize, RenderTarget sceneMap, bool passScipt)
{
if (script == null)
{
throw new ArgumentNullException(nameof(script));
}
#region State variables
//Color clearColor = Color.Black;
//float clearDepth = 1.0f;
//int clearStencil = 0;
#endregion
foreach (SasScriptCommand commandObject in script)
{
commandObject.Update();
switch (commandObject.Command)
{
#region Clear
//case SasScriptCommand.CommandType.Clear:
// using (new ProfilerEvent("SAS script: clear"))
// {
// SasScriptClear clear = (SasScriptClear)commandObject;
// switch (clear.ClearOption)
// {
// case SasScriptClear.ClearType.Color:
// engine.Device.Clear(ClearFlags.Target, clearColor, clearDepth, clearStencil);
// break;
// case SasScriptClear.ClearType.Depth:
// engine.Device.Clear(ClearFlags.ZBuffer, clearColor, clearDepth, clearStencil);
// break;
// case SasScriptClear.ClearType.Stencil:
// engine.Device.Clear(ClearFlags.Stencil, clearColor, clearDepth, clearStencil);
// break;
// default:
// break;
// }
// }
// break;
//case SasScriptCommand.CommandType.ClearSetColor:
// SasScriptClearSetColor clearSetColor = (SasScriptClearSetColor)commandObject;
// clearColor = ColorHelper.Vector4ToColor(clearSetColor.Color);
// break;
//case SasScriptCommand.CommandType.ClearSetDepth:
// SasScriptClearSetDepth clearSetDepth = (SasScriptClearSetDepth)commandObject;
// clearDepth = clearSetDepth.Depth;
// break;
//case SasScriptCommand.CommandType.ClearSetStencil:
// SasScriptClearSetStencil clearSetStencil = (SasScriptClearSetStencil)commandObject;
// clearStencil = clearSetStencil.Stencil;
// break;
#endregion
#region Render color target
case SasScriptCommand.CommandType.RenderColorTarget:
var renderColorTarget = (SasScriptRenderColorTarget)commandObject;
if (renderColorTarget.TextureHandle == null)
{
Profiler.AddEvent("SAS script: restore original output target");
_activeRenderTarget = null;
}
else
{
if (passScipt)
{
using (new ProfilerEvent("SAS script: link new render target as output target"))
{
_activeRenderTarget = null;
// Try to reuse an existing RenderTarget
_availableRenderTargets.RemoveFirst(renderTarget =>
{
if (renderTarget.Size == sceneSize)
{
// Found suitable RenderTarget
_activeRenderTarget = renderTarget;
_usedRenderTargets.Add(renderTarget);
return(true); // Stop looking, remove from the pool
}
return(false); // Continue looking, keep in the pool
});
// Create new RenderTargets if necessary
if (_activeRenderTarget == null)
{
_activeRenderTarget = new RenderTarget(Engine, sceneSize);
_usedRenderTargets.Add(_activeRenderTarget);
}
Effect.SetTexture(renderColorTarget.TextureHandle, _activeRenderTarget);
}
}
else
{
using (new ProfilerEvent("SAS script: link existing render target to input variable"))
Effect.SetTexture(renderColorTarget.TextureHandle, sceneMap);
}
}
break;
#endregion
#region Render depth stencil target
//case SasScriptCommand.CommandType.RenderDepthStencilTarget:
// SasScriptRenderDepthStencilTarget renderDepthTarget =
// (SasScriptRenderDepthStencilTarget)commandObject;
// SasTexture tex = mat.GetTexture(renderDepthTarget.TextureHandle);
// if (tex != null)
// renderer.SetDepthTarget(tex.DepthSurface);
// else
// renderer.SetDepthTarget(null);
// break;
#endregion
#region Technique
case SasScriptCommand.CommandType.Technique:
using (new ProfilerEvent("SAS script: set technique"))
{
var tech = (SasScriptTechnique)commandObject;
if (tech.Handle != null)
{
Effect.Technique = tech.Handle;
}
}
break;
#endregion
#region Pass
case SasScriptCommand.CommandType.Pass:
if (render != null && !passScipt)
{
var pass = (SasScriptPass)commandObject;
using (new ProfilerEvent(() => "SAS script: pass " + pass.PassNum))
{
ExecuteScript(Passes[Effect.GetPass(Effect.Technique, pass.PassNum)], render, sceneSize, sceneMap, true);
Effect.BeginPass(pass.PassNum);
if (_activeRenderTarget == null)
{
render();
}
else
{
_activeRenderTarget.RenderTo(Engine.DrawQuadShader);
}
Effect.EndPass();
}
}
break;
#endregion
}
}
}