/// <summary>Allocates GPU drawing meta now.</summary>
public virtual DrawStackNode Allocate(DrawInfo info, SurfaceTexture tex, ref int stackID)
{
// If the source is a constant or a graph
// then we don't allocate a material for it.
// We do, however, create a texture:
// CONSTANT: 1 * 1 (Texture)
// GRAPH : info.ImageX * 1 (Texture)
// ELSE : info.ImageX * info.ImageY (Stack)
int dimensions = OutputDimensions;
if (dimensions == 2)
{
// Stack required.
// Allocate a target stack now:
int targetStack = stackID;
DrawStack stack = tex.GetStack(targetStack, info);
stackID++;
// Create the material:
Material material = GetMaterial(MaterialID, SubMaterialID);
if (Sources != null)
{
int inputStacks = (targetStack == 0)?1:0;
for (int i = 0; i < Sources.Length; i++)
{
// Get the input node:
TextureNode input = Sources[i];
// Allocate it now (must not allocate targetStack in the direct kids):
DrawStackNode drawNode = input.Allocate(info, tex, ref inputStacks);
if (inputStacks == targetStack)
{
// Skip:
inputStacks++;
}
// Apply it to our material:
material.SetTexture("_Src" + i, drawNode.Texture);
}
}
// Create our node:
MaterialStackNode matNode = DrawStore as MaterialStackNode;
if (matNode == null)
{
matNode = new MaterialStackNode();
DrawStore = matNode;
matNode.Mesh = info.Mesh;
}
matNode.Material = material;
matNode.Stack = stack;
return(matNode);
}
// It'll be baked/ drawn by the CPU.
// Get the width of the texture:
int width = (dimensions == 1)?info.ImageX : 1;
TextureStackNode constNode = DrawStore as TextureStackNode;
if (constNode == null)
{
constNode = new TextureStackNode(this, info.HDR, width);
DrawStore = constNode;
}
// Ok:
return(constNode);
}
