source: GTP/trunk/App/Demos/Illum/IBRBillboardCloudTrees/Shark3D/demo_v5x0x7_t164x31u_enterpr_kwin32/bin/res/levelutil/shader/prog/d3d9_hlsl/indirect_texturing_shmap_spotlight_d3d9_hlsl_ps2x0.s3d_shadercode_run @ 2330

///////////////////////////////////////////////////////////////////////////////
//
//      ##  ######
//       ######  ###
//  ## ###############        Shark 3D Engine (www.shark3d.com)
//   ########## # # #
//    ########                Copyright (c) 1996-2006 Spinor GmbH.
//   ######### # # #          All rights reserved.
//  ##   ##########
//      ##
//
///////////////////////////////////////////////////////////////////////////////

#include \
    <levelutil/shader/prog/d3d9_hlsl/include_shmap_filter_d3d9_hlsl.s3d_shadercode_run>

///////////////////////////////////////////////////////////////////////////////

struct PS_INPUT
{
    float2 mainTexCoord: TEXCOORD0;
    float2 texCoord0: TEXCOORD1;
    float2 texCoord1: TEXCOORD2;
    float3 diffuse: TEXCOORD3;
    float3 specular: TEXCOORD4;    
#ifdef S3D_LIGHT_PROJ
    float4 lightProjCoord: TEXCOORD5;
#endif
#ifdef S3D_LIGHT_SHMAP
    float4 lightShmapCoord: TEXCOORD6;
#endif
};

///////////////////////////////////////////////////////////////////////////////

sampler tex0: register(s0);
sampler tex1: register(s1);
#ifdef S3D_LIGHT_PROJ
sampler lightProjSamp: register(s2);
#endif
#ifdef S3D_LIGHT_SHMAP
sampler lightShmapSamp: register(s3);
#endif

///////////////////////////////////////////////////////////////////////////////

const float4 lightAmbient;
const float4 lightDiffuse;
const float4 lightSpecular;

#ifdef S3D_LIGHT_SHMAP
const float4 lightShmapSize;
const float4 lightShmapRcpSize;
#endif

///////////////////////////////////////////////////////////////////////////////

#define S3D_INTENS_DISCARD_TRESHOLD 0.001
#define S3D_BRIGHT_EPS 0.01

///////////////////////////////////////////////////////////////////////////////
// Pixelshader
// Profile: 2x0

float4 main(PS_INPUT input): COLOR0
{

#ifdef S3D_LIGHT_SHMAP
    float3 clipVal = input.lightShmapCoord.www 
            - abs(2 * input.lightShmapCoord.xyz - input.lightShmapCoord.www);
    clip(clipVal.xyz);
#endif

#ifdef S3D_LIGHT_SHMAP
    // Shadow map:
    float shmapVal = s3d_shmapFilter(
            lightShmapSamp, input.lightShmapCoord,
            lightShmapSize, lightShmapRcpSize);
    clip(shmapVal - S3D_INTENS_DISCARD_TRESHOLD);            
#endif
    
    float sourceTextureSize = 16.0;
    float sqrtNumSamples = 4.0;
    float epsilonX = -0.35;
    float epsilonY = -0.06;
    float4 ocolor = float4(0.0, 1.0, 0.0, 0.0);
    float2 epsilon = float2(epsilonX, epsilonY);
    float4 value = tex2D(tex0, input.texCoord1).xyzw;
    float2 coords = float2(0.0, 1.0) - abs(input.texCoord0 - ( value.xy - epsilon ) );
    if (value.w != 0.0) 
    {   
        float2 newcoord = (float2(1.0, 1.0) - value.zw) + ((coords * sourceTextureSize) / sqrtNumSamples);
        ocolor = float4(tex2D(tex1, newcoord).xyzw);
    }
    
    float4 outCol;
    outCol.rgb = input.diffuse * ocolor.rgb * lightDiffuse.xyz * 2.0 + input.specular * ocolor.rgb * lightSpecular.xyz * 3.0 + ocolor.rgb;

    // Preserve original opacity from texture.
    outCol.a = ocolor.a;

#ifdef S3D_LIGHT_PROJ
    float4 texColProjTex = tex2Dproj(lightProjSamp, input.lightProjCoord);
    outCol *= texColProjTex;
#endif

#ifdef S3D_LIGHT_SHMAP
    shmapVal = shmapVal + 0.65;
    shmapVal = clamp(shmapVal, 0.0, 1.0);
    outCol *= shmapVal;
#endif
    
    return outCol;
}

///////////////////////////////////////////////////////////////////////////////