private void BuildFFPSubRenderState(int subRenderStateOrder, string subRenderStateType,
ShaderGenerator.SGPass sgPass, TargetRenderState renderState)
{
if (subRenderStateOrder == -1)
{
throw new Exception("Actual sub render type needs to be declared");
}
SubRenderState subRenderState;
subRenderState = sgPass.GetCustomFFPSubState(subRenderStateOrder);
if (subRenderState == null)
{
subRenderState = ShaderGenerator.Instance.CreateSubRenderState(subRenderStateType);
}
if (subRenderState.PreAddToRenderState(renderState, sgPass.SrcPass, sgPass.DstPass))
{
renderState.AddSubRenderStateInstance(subRenderState);
}
else
{
ShaderGenerator.Instance.DestroySubRenderState(subRenderState);
}
}
private void ResolveColorStageFlags(ShaderGenerator.SGPass sgPass, TargetRenderState renderState)
{
var subRenderStateList = renderState.TemplateSubRenderStateList;
FFPColor colorSubState = null;
//find the color sub state
foreach (var curSubRenderState in subRenderStateList)
{
if (curSubRenderState.Type == FFPColor.FFPType)
{
colorSubState = curSubRenderState as FFPColor;
}
}
foreach (var curSubRenderState in subRenderStateList)
{
//Add vertex shader specular lighting output in case of specular enabled.
if (curSubRenderState.Type == FFPLighting.FFPType)
{
colorSubState.AddResolveStageMask((int)FFPColor.StageFlags.VsOutputdiffuse);
Pass srcPass = sgPass.SrcPass;
if (srcPass.Shininess > 0 && srcPass.Specular != ColorEx.Black)
{
colorSubState.AddResolveStageMask((int)FFPColor.StageFlags.VsOutputSpecular);
}
break;
}
}
}
/// <summary>
/// build render state from the given pass that emulates the fixed function pipeline behavior
/// </summary>
/// <param name="sgPass"> The shader generator pass representation. Contains both source and destination pass </param>
/// <param name="renderState"> The target render state that will hold the given pass FFP representation </param>
public void BuildRenderState(ShaderGenerator.SGPass sgPass, TargetRenderState renderState)
{
renderState.Reset();
//Build transformation sub state
BuildFFPSubRenderState(-1, FFPTransform.FFPType, sgPass, renderState);
//Build color sub state
BuildFFPSubRenderState(-1, FFPTransform.FFPType, sgPass, renderState);
//Build lighting sub state.
BuildFFPSubRenderState(-1, FFPTransform.FFPType, sgPass, renderState);
//Build texturing sub state
BuildFFPSubRenderState(-1, FFPTransform.FFPType, sgPass, renderState);
//Build fog sub state
BuildFFPSubRenderState(-1, FFPTransform.FFPType, sgPass, renderState);
//resolve color stage flags
ResolveColorStageFlags(sgPass, renderState);
}
