Bool Resource::Layout::Create(const Description& description)
{
// Prepare the D3D11 input layout
D3D11_INPUT_ELEMENT_DESC* inputLayout = new D3D11_INPUT_ELEMENT_DESC[description.Elements.Count];
// Fill in all of the elements
for(UInt i = 0; i < description.Elements.Count; ++i)
{
inputLayout[i].SemanticName = description.Elements[i].Name.c_str();
inputLayout[i].SemanticIndex = description.Elements[i].Index;
inputLayout[i].Format = (DXGI_FORMAT)description.Elements[i].Format;
inputLayout[i].InputSlot = description.Elements[i].Slot;
inputLayout[i].AlignedByteOffset = description.Elements[i].Offset;
// No support for instancing yet
inputLayout[i].InputSlotClass = D3D11_INPUT_PER_VERTEX_DATA; //description.Elements[i].Classification;
inputLayout[i].InstanceDataStepRate = 0; //description.Elements[i].InstanceStepRate;
}
// Get the device handle
Graphics::Device& device = Graphics::Manager::Singleton->Device;
File shaderFile;
// Open the shader associated with this input layout to retrieve its input signature
Bool result = shaderFile.Open(description.Shader, File::Mode::Read);
if(FAILED(result)) {
return false;
}
// Load the shader data
shaderFile.Allocate(shaderFile.FileSize + 1);
shaderFile.Load(shaderFile.FileSize);
Log::Singleton->Write("Creating input layout with (" + description.Shader + ") vertex shader");
// Create the vertex input layout
HRESULT hresult = device->CreateInputLayout(inputLayout, description.Elements.Count, shaderFile.Data, shaderFile.Size, &Handle);
if(FAILED(hresult)) {
return false;
}
// We're done with the file for now
shaderFile.Close();
// Success!
return true;
}
Bool Resource::Layout::CreateFromFile(const String& filename)
{
File layoutFile;
// Open the file containing the layout
layoutFile.Open(filename, File::Mode::Read);
// Prepare a description to create the layout
Resource::Layout::Description layoutDesc;
String name;
// Get the resource name of the input layout
UInt length = layoutFile.Read<UByte>();
name += layoutFile.Read<Char>(length);
// Read the number of input elements
UInt elements = layoutFile.Read<UByte>();
layoutDesc.Elements.Reserve(elements);
// Read each input layout
for(UInt i = 0; i < elements; ++i)
{
// Write the size of the string then the string to the file
length = layoutFile.Read<UByte>();
layoutDesc.Elements[i].Name += layoutFile.Read<Char>(length);
// Simply write the rest of the element to disk
layoutDesc.Elements[i].Index = layoutFile.Read<UInt>();
layoutDesc.Elements[i].Format = layoutFile.Read<Texture::Format>();
layoutDesc.Elements[i].Slot = layoutFile.Read<UInt>();
layoutDesc.Elements[i].Offset = layoutFile.Read<UInt>();
}
// Read the shader blob
length = layoutFile.Read<UInt>();
layoutFile.Allocate(length + 1);
layoutFile.Load(length);
// Prepare the D3D11 input layout
D3D11_INPUT_ELEMENT_DESC* inputLayout = new D3D11_INPUT_ELEMENT_DESC[elements];
// Fill in all of the elements
for(UInt i = 0; i < elements; ++i)
{
inputLayout[i].SemanticName = layoutDesc.Elements[i].Name.c_str();
inputLayout[i].SemanticIndex = layoutDesc.Elements[i].Index;
inputLayout[i].Format = (DXGI_FORMAT)layoutDesc.Elements[i].Format;
inputLayout[i].InputSlot = layoutDesc.Elements[i].Slot;
inputLayout[i].AlignedByteOffset = layoutDesc.Elements[i].Offset;
// No support for instancing yet
inputLayout[i].InputSlotClass = D3D11_INPUT_PER_VERTEX_DATA; //description.Elements[i].Classification;
inputLayout[i].InstanceDataStepRate = 0; //description.Elements[i].InstanceStepRate;
}
// Get the device handle
Graphics::Device& device = Graphics::Manager::Singleton->Device;
Log::Singleton->Write("Creating input layout (" + name + ")");
// Create the vertex input layout
HRESULT result = device->CreateInputLayout(inputLayout, elements, layoutFile.Data, layoutFile.Size, &Handle);
if(FAILED(result)) {
return false;
}
// And done
layoutFile.Close();
// Whoo
return true;
}
