D3D11_TEXTURE2D_DESC desc;
    desc.Width = width;
    desc.Height = height;
    desc.MipLevels = 1;
    desc.ArraySize = 1;
    desc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
    desc.SampleDesc.Count = 1;
    desc.SampleDesc.Quality = 0;
    desc.Usage = D3D11_USAGE_DEFAULT;
    desc.BindFlags = D3D11_BIND_SHADER_RESOURCE;
    desc.CPUAccessFlags = 0;
    desc.MiscFlags = 0;

struct VS_INPUT
{
    float4 Pos : POSITION;
    float2 tex : TEXCOORD0;
};

cbuffer World
{
    matrix WorldMat;
    matrix ViewMat;
    matrix ProjMat;
};

struct PS_INPUT
{
    float4 Pos : SV_POSITION;
    float2 tex : TEXCOORD0;
};

PS_INPUT VS( VS_INPUT input )
{
    PS_INPUT output = (PS_INPUT)0;
    output.Pos = mul(input.Pos, WorldMat);
    output.Pos = mul(output.Pos, ViewMat);
    output.Pos = mul(output.Pos, ProjMat);
    output.tex = input.tex;
    float2 texCoord = input.tex;
    output.tex = texCoord;
    return output;
}