/// <summary>
/// Binds the specified texture to the specified texture at the given variable name and slot
/// </summary>
/// <param name="shader"></param>
/// <param name="uniform"></param>
/// <param name="texture"></param>
/// <param name="slot"></param>
public void BindShaderTexture(Shader shader, string uniform, Texture2D texture)
{
// Get the view and bind it to the shader
ShaderResourceView view = AcquireResourceView(texture);
shader.SetVariable(uniform, view);
// See if the view is already bound to a slot
// Whilst we're at it, see if there's a free slot we can use, and search for slot with the lowest uses
int freeslot = -1;
int lowestuses = resourceviewslots[0].NumUses;
int lowestusesidx = 0;
for (int i = 0; i < MaxPixelShaderResourceViewSlots; i++)
if (resourceviewslots[i].View == view)
{
resourceviewslots[i].NumUses++;
return;
}
else if (resourceviewslots[i].View == null && freeslot == -1)
freeslot = i;
else if (resourceviewslots[i].NumUses < lowestuses)
{
lowestuses = resourceviewslots[i].NumUses;
lowestusesidx = i;
}
// If we got this far, we need to find a slot
// If there is none free, select the one with the lowest uses
freeslot = lowestusesidx;
// Use it
context.PixelShader.SetShaderResource(view, freeslot);
resourceviewslots[freeslot].View = view;
resourceviewslots[freeslot].NumUses = 1;
}
