Stuff

float4x4 view_proj_matrix
float4x4 view_matrix;
float4 lightDir;
struct VS_INPUT
{
   float4 Pos    : POSITION0;
   float3 Normal : NORMAL0;
};

struct VS_OUTPUT
{
   float4 Pos      : POSITION0;
   float2 TexCoord : TEXCOORD0;
};

VS_OUTPUT vs_main( VS_INPUT In )
{
   VS_OUTPUT Out; 

   Out.Pos = mul( view_proj_matrix, In.Pos );
   
   float3 normalW = mul( (float3x3)view_matrix, In.Normal );

   float diffuse = max(0,dot(-lightDir,normalW));
   Out.TexCoord.x = diffuse;
   Out.TexCoord.y = 0.0f;

   return Out;
}

sampler ToonShaderTexture;
struct PS_INPUT
{
   float2 TexCoord : TEXCOORD0;
};

struct PS_OUTPUT
{
   float4 Color    : COLOR0;
};

PS_OUTPUT ps_main( PS_INPUT In )
{
    PS_OUTPUT Out;
 
    Out.Color = tex2D(ToonShaderTexture,In.TexCoord);
    
    return Out;
}