<!-- Forward Shading Pipeline -->
<Pipeline>
        <Setup>
            <RenderTarget id="BUF0" depthBuf="true" numColBufs="1" format="RGBA8"  scale="1.0" maxSamples="4"/>   
            <RenderTarget id="BUF1" depthBuf="true" numColBufs="1" format="RGBA8"  scale="1.0" maxSamples="4"/>   
        </Setup>
   <CommandQueue>
      <Stage id="StaticPass" link="pipelines/globalSettings.material.xml">
                        <SwitchTarget target="BUF0" />
         <ClearTarget depthBuf="true" colBuf0="true" />
         
         <DrawGeometry context="AMBIENT" class="wall" />
         <DoForwardLightLoop class="wall" />
      </Stage>

      <Stage id="DynamicPass">
         <SwitchTarget target="BUF1" />
         <ClearTarget depthBuf="true" colBuf0="true" />

                        <!-- xxx doesnt work -->
                        <!-- Copy depth buffer to allow occlusion culling of lights -->
                        <!--
                        <BindBuffer sampler="depthBuf" sourceRT="BUF0" bufIndex="32" />
                        <DrawQuad material="materials/light.material.xml" context="COPY_DEPTH" />

                        <UnbindBuffers />
                        -->

         <DrawGeometry context="AMBIENT" class="dynamic" />
         <DoForwardLightLoop class="dynamic" />
      </Stage>

      <Stage id="Translucent">
         <DrawGeometry context="TRANSLUCENT" class="Translucent" order="BACK_TO_FRONT" />
      </Stage>

      <Stage id="TestPass">
         <SwitchTarget target="" />
                        <BindBuffer sampler="buf0" sourceRT="BUF0" bufIndex="0" />
                        <BindBuffer sampler="buf1" sourceRT="BUF1" bufIndex="0" />
                        <DrawQuad material="pipelines/testpass.material.xml" context="TESTPASS" />
         <UnbindBuffers />
      </Stage>

      <Stage id="Overlays">
         <DrawOverlays context="OVERLAY" />
      </Stage>
   </CommandQueue>
</Pipeline>

[[FX]]

// depth
sampler2D depthBuf = sampler_state
{
    Address = Clamp;
};
 
// walls
sampler2D buf0 = sampler_state
{
    Address = Clamp;
};

// dynamic
sampler2D buf1 = sampler_state
{
    Address = Clamp;
};

sampler2D fgtex = sampler_state
{
};
 
context TESTPASS
{
    VertexShader = compile GLSL VS_GENERAL;
    PixelShader = compile GLSL FS_GENERAL;
}

context COPY_DEPTH
{
    VertexShader = compile GLSL VS_FSQUAD;
    PixelShader = compile GLSL FS_COPY_DEPTH;
}
 
 
[[VS_GENERAL]]
 
#include "shaders/utilityLib/vertCommon.glsl"

uniform mat4 projMat;
attribute vec3 vertPos;
varying vec2 texCoords;
            
void main(void)
{
   texCoords = vertPos.xy;
   gl_Position = projMat * vec4( vertPos, 1 );
}

         
[[FS_GENERAL]]
 
uniform sampler2D buf0;
uniform sampler2D buf1;
uniform sampler2D fgtex;
varying vec4 pos, vsPos;
varying vec2 texCoords;

void main(void)
{
    vec4 tex0;
    vec4 tex1;
    vec4 tex2;
    vec4 P1;

    tex0 = texture2D(buf0, texCoords);
    tex1 = texture2D(fgtex, texCoords * vec2(1.0, -1.0));
    tex2 = texture2D(buf1, texCoords);

    P1 = tex0 * (tex0 + (2.0 * tex1) * (1.0 - tex0));
    //P1 = tex0 * (tex0 + (1.6 * tex1) * (1.0 - tex0));
    P1 = P1 * (P1 + (2.0 * tex1) * (1.0 - P1));
    P1 = mix(P1, tex2, tex2.a);
    //gl_FragColor = mix(tex0, tex2, tex2.a);

    gl_FragColor = P1;
}


[[VS_FSQUAD]]

uniform mat4 projMat;
attribute vec3 vertPos;
varying vec2 texCoords;

void main( void )
{
texCoords = vertPos.xy;
gl_Position = projMat * vec4( vertPos, 1 );
}


[[FS_COPY_DEPTH]]

uniform sampler2D depthBuf;
varying vec2 texCoords;

void main( void )
{
    gl_FragDepth = texture2D( depthBuf, texCoords ).r;
}