IsValid

DirectXMesh

Returns true if the given Direct3D input layout is valid, or false otherwise.

bool IsValid( const D3D11_INPUT_ELEMENT_DESC* vbDecl, size_t nDecl );

bool IsValid( const D3D12_INPUT_LAYOUT_DESC& vbDecl );

Header

#include "DirectXMesh.h"

By default, the library supports Direct3D 11. If you want to support Direct3D 12, then you need to #include <d3d12.h> before you do #include "DirectXMesh.h".

Parameters

vbDecl: Input layout description, which is nDecl elements long.

Remark

This performs many but not all of the same checks that the Direct3D debug layer performs.

Example

Direct3D 11

const D3D11_INPUT_ELEMENT_DESC inputLayout[] =
{
{ "SV_Position", 0, DXGI_FORMAT_R32G32B32_FLOAT,    0, D3D11_APPEND_ALIGNED_ELEMENT, D3D11_INPUT_PER_VERTEX_DATA, 0 },
{ "NORMAL",      0, DXGI_FORMAT_R32G32B32_FLOAT,    0, D3D11_APPEND_ALIGNED_ELEMENT, D3D11_INPUT_PER_VERTEX_DATA, 0 },
{ "TANGENT",     0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0, D3D11_APPEND_ALIGNED_ELEMENT, D3D11_INPUT_PER_VERTEX_DATA, 0 },
{ "COLOR",       0, DXGI_FORMAT_R8G8B8A8_UNORM,     0, D3D11_APPEND_ALIGNED_ELEMENT, D3D11_INPUT_PER_VERTEX_DATA, 0 },
{ "TEXCOORD",    0, DXGI_FORMAT_R32G32_FLOAT,       0, D3D11_APPEND_ALIGNED_ELEMENT, D3D11_INPUT_PER_VERTEX_DATA, 0 },
{ "BLENDINDICES",0, DXGI_FORMAT_R8G8B8A8_UINT,      0, D3D11_APPEND_ALIGNED_ELEMENT, D3D11_INPUT_PER_VERTEX_DATA, 0 },
{ "BLENDWEIGHT", 0, DXGI_FORMAT_R8G8B8A8_UNORM,     0, D3D11_APPEND_ALIGNED_ELEMENT, D3D11_INPUT_PER_VERTEX_DATA, 0 },
};

if (!IsValid(inputLayout, std::size(inputLayout)))
    // error

Direct3D 12

const D3D12_INPUT_ELEMENT_DESC inputLayout[] =
{
{ "SV_Position", 0, DXGI_FORMAT_R32G32B32_FLOAT,    0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
{ "NORMAL",      0, DXGI_FORMAT_R32G32B32_FLOAT,    0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
{ "TANGENT",     0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
{ "COLOR",       0, DXGI_FORMAT_R8G8B8A8_UNORM,     0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
{ "TEXCOORD",    0, DXGI_FORMAT_R32G32_FLOAT,       0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
{ "BLENDINDICES",0, DXGI_FORMAT_R8G8B8A8_UINT,      0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
{ "BLENDWEIGHT", 0, DXGI_FORMAT_R8G8B8A8_UNORM,     0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
};

D3D12_INPUT_LAYOUT_DESC desc = { inputLayout, static_cast<UINT>(std::size(inputLayout)) };
if (!IsValid(desc))
    // error