셰이더 프로그래밍 기본공부 22

이전의 이미지에 블러를 추가한 다음에
그걸 덧셈 연산으로 원 이미지와 혼합해서
블룸 효과 - 뽀샤시 효과-를 만들다.

원본이미지에다가

POW와 블러 이미지를 연산해서 다음 그림을 만들었슴다.
다시 이걸 원본 이미지와 단순한 덧셈연산으로 계산.
일명 ‘뽀샤시 효과’ 라고 부르는 블룸 효과를 완성했습니다.
좌측은 원본. 우측이 뽀샤시 효과가 적용된 최종버전이죠.

//이전과 이어짐

//DrawblueX Vertex

struct VS_INPUT
{
float4 Position : POSITION0;

};

struct VS_OUTPUT
{
   float4 Position : POSITION0;
   float2 texcoord : TEXCOORD0;

};

VS_OUTPUT vs_main( VS_INPUT Input )
{
VS_OUTPUT Output;

   Input.Position.xy = sign(Input.Position.xy);
   Output.Position = float4 (Input.Position.xy , 0.0f, 1.0f);

   Output.texcoord = (float2(Output.Position.x, -Output.Position.y) +1.0f)/2.0f;

   return( Output );

}

//DrawblueX Pixel
sampler2D Texture0;

float4 gaussFilter [7] =
{
   0.0, -3.0,0.0, 1.0/64.0,
   0.0, -2.0,0.0, 6.0/64.0,
   0.0, -1.0,0.0, 15.0/64.0,
   0.0, 0.0,0.0, 20.0/64.0,
   0.0, 1.0,0.0, 15.0/64.0,
   0.0, 2.0,0.0, 6.0/64.0,
   0.0, 3.0,0.0, 1.0/64.0
};

float texscaler = 1.0/128.0;
float texOffset = 0.0;

float4 ps_main(float2 texcoord : TEXCOORD0) : COLOR0
{

   float4 color = 0.0;

   int i;

   for (i=0;i<7;i++)
      {

         color += tex2D(Texture0,float2(texcoord.x + gaussFilter[i].x * texscaler ,
                                        texcoord.y + gaussFilter[i].y * texscaler))
                                        * gaussFilter [i].w;
      }

    return color;

}

//DrawblueY Vertex

struct VS_INPUT
{
float4 Position : POSITION0;

};

struct VS_OUTPUT
{
   float4 Position : POSITION0;
   float2 texcoord : TEXCOORD0;

};

VS_OUTPUT vs_main( VS_INPUT Input )
{
VS_OUTPUT Output;

//DrawblueY Pixel

sampler2D Texture0;

float4 gaussFilter [7] =
{
   -3.0,0.0,0.0, 1.0/64.0,
   -2.0,0.0,0.0, 6.0/64.0,
   -1.0,0.0,0.0, 15.0/64.0,
    0.0,0.0,0.0, 20.0/64.0,
    1.0,0.0,0.0, 15.0/64.0,
    2.0,0.0,0.0, 6.0/64.0,
    3.0,0.0,0.0, 1.0/64.0
};

float texscaler = 1.0/128.0;
float texOffset = 0.0;

float4 ps_main(float2 texcoord : TEXCOORD0) : COLOR0
{

//DrawBlend Vertex

struct VS_INPUT
{
float4 Position : POSITION0;

};

struct VS_OUTPUT
{
float4 Position : POSITION0;
float2 texcoord : TEXCOORD0;
};

VS_OUTPUT vs_main( VS_INPUT Input )
{
   VS_OUTPUT Output;
   Input.Position.xy = sign(Input.Position.xy);
   Output.Position = float4(Input.Position.xy , 0.0f,1.0f);

   Output.texcoord = (float2(Output.Position.x , -Output.Position.y)+1.0f)/2.0f;

   return( Output );

}

//DrawBlend Pixel

sampler2D Texture0;
sampler2D Texture1;

float4 ps_main(float2 texcoord : TEXCOORD0) : COLOR0
{

float4 c0 = tex2D(Texture0,texcoord );
float4 c1 = tex2D(Texture1,texcoord );

return c0*0.9 +c1*0.5;

}