//
// Fragment shader for doom-like lighting on walls
//
// Copyright (c) 2007 by Andrey Budko
//
// See gl_shader.c for license information
//

uniform sampler2D tex;
//uniform sampler2D texDetail;
uniform sampler2D texColormap;
//uniform sampler2D texData;

uniform vec2 texSizes;
uniform vec2 texelSizes;
uniform vec2 halfTexelSizes;

uniform float rgbaScale;
uniform float rgbaBias;

uniform float cmFixed;
uniform float cmMinScaled;
uniform float cmMaxScaled;

uniform float Param1;
uniform float Param2;

float cm;
vec2 texCoord;
vec4 final;

void DoFiltering();

void main()
{
  texCoord = gl_TexCoord[0].st - halfTexelSizes;

  if (cmFixed != -1.0)
  {
    cm = cmFixed;
  }
  else
  {
    cm = clamp(Param2 - gl_FragCoord.x * Param1, cmMinScaled, cmMaxScaled);
  }

  DoFiltering();

  gl_FragColor = final * gl_Color;

//  vec4 texel_detail = texture2D(texDetail, gl_TexCoord[0].st*(texSizes/vec2(18.0, 18.0)));
//  texel_detail = texel_detail * vec4(Param5, Param5, Param5, 1.0);
//  vec4 texel_detail = texture2D(texDetail, gl_TexCoord[1].st) * vec4(Param5, Param5, Param5, 1.0);
//  gl_FragColor = gl_FragColor * texel_detail;// * vec4(2.0,2.0,2.0,2.0);
}