public VertexShader(string filename, params IShaderResourceBinding[] otherBindings)
: base(ShaderType.Vertex, filename, otherBindings)
{
InstanceDataBinding = null;
ViewProjMatBinding = null;
this.InputBindings = ResourceBindings.OfType <VertexInputBinding>().ToArray();
if (InputBindings.Length > MAX_VS_INPUT_BINDINGS)
{
throw new ArgumentException("Can not specify more than " + MAX_VS_INPUT_BINDINGS + " vertex input bindings.", "otherBindings");
}
this.NumInputSlots = InputBindings.Any() ? InputBindings.Max(bind => bind.SlotIndex) + 1U : 0U;
if (NumInputSlots > MAX_VS_INPUT_BINDINGS)
{
throw new ArgumentException("Can not set more than " + MAX_VS_INPUT_BINDINGS + " input slots.");
}
}
private GeometryInputLayout CreateInputLayout(VertexShader shader)
{
uint numInputBindings = (uint)shader.InputBindings.Length;
List <KeyValuePair <VertexInputBinding, IVertexBuffer> > inputLayoutComponentBuffers = new List <KeyValuePair <VertexInputBinding, IVertexBuffer> >();
// +3 because the instance matrix is split in to four row vectors
InputElementDesc[] inputElements = new InputElementDesc[numInputBindings + 3];
for (int i = 0; i < numInputBindings; ++i)
{
VertexInputBinding curVIB = shader.InputBindings[i];
if (curVIB == shader.InstanceDataBinding)
{
continue;
}
string semantic = curVIB.Identifier;
int componentBufferIndex = Array.IndexOf(vertexComponentSemantics, semantic);
if (componentBufferIndex < 0)
{
throw new InvalidOperationException("Can not bind " + this + " to vertex shader with semantics " +
shader.InputBindings.Select(srb => srb.Identifier).ToStringOfContents() + ", " +
"semantic '" + semantic + "' is not provided in this cache!");
}
IVertexBuffer bufferForCurSemantic = vertexComponentBuffers[componentBufferIndex];
ResourceFormat formatForCurSemantic = vertexComponentFormats[componentBufferIndex];
inputLayoutComponentBuffers.Add(new KeyValuePair <VertexInputBinding, IVertexBuffer>(curVIB, bufferForCurSemantic));
inputElements[i] = new InputElementDesc(
semantic,
0U,
formatForCurSemantic,
curVIB.SlotIndex,
true
);
}
// Add the instance data slot
uint semanticIndex = 0U;
for (uint i = numInputBindings - 1U; i < numInputBindings + 3U; ++i)
{
inputElements[i] = new InputElementDesc(
shader.InstanceDataBinding.Identifier,
semanticIndex++,
VertexShader.INSTANCE_DATA_FORMAT,
shader.InstanceDataBinding.SlotIndex,
false
);
}
InputLayoutHandle outInputLayoutPtr;
NativeCallResult createInputLayoutResult = InteropUtils.CallNative(NativeMethods.ShaderManager_CreateInputLayout,
RenderingModule.Device,
shader.Handle,
inputElements,
(uint)inputElements.Length,
(IntPtr)(&outInputLayoutPtr)
);
if (!createInputLayoutResult.Success)
{
throw new InvalidOperationException("Given shader could not be bound to this cache, " +
"this is likely because one or more semantics/bindings are incorrect. Details: " + createInputLayoutResult.FailureMessage);
}
Logger.Debug("Successfully created input layout for " + shader + " and " + this + ": " + inputElements.ToStringOfContents());
return(new GeometryInputLayout(outInputLayoutPtr, inputLayoutComponentBuffers.ToArray(), shader, this));
}