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/**
* @file class1/deferred/softenLightF.glsl
*
* $LicenseInfo:firstyear=2007&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2007, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#extension GL_ARB_texture_rectangle : enable
#extension GL_ARB_shader_texture_lod : enable
/*[EXTRA_CODE_HERE]*/
#ifdef DEFINE_GL_FRAGCOLOR
out vec4 frag_color;
#else
#define frag_color gl_FragColor
#endif
uniform sampler2DRect diffuseRect;
uniform sampler2DRect specularRect;
uniform sampler2DRect normalMap;
uniform sampler2DRect lightMap;
uniform sampler2DRect depthMap;
uniform samplerCube environmentMap;
uniform sampler2D lightFunc;
uniform float blur_size;
uniform float blur_fidelity;
// Inputs
uniform mat3 env_mat;
uniform vec3 sun_dir;
uniform vec3 moon_dir;
uniform int sun_up_factor;
VARYING vec2 vary_fragcoord;
uniform mat4 inv_proj;
uniform vec2 screen_res;
vec3 getNorm(vec2 pos_screen);
vec4 getPositionWithDepth(vec2 pos_screen, float depth);
void calcAtmosphericVars(vec3 inPositionEye, float ambFactor, out vec3 sunlit, out vec3 amblit, out vec3 additive, out vec3 atten);
float getAmbientClamp();
vec3 atmosFragLighting(vec3 l, vec3 additive, vec3 atten);
vec3 scaleSoftClipFrag(vec3 l);
vec3 linear_to_srgb(vec3 c);
vec3 srgb_to_linear(vec3 c);
#ifdef WATER_FOG
vec4 applyWaterFogView(vec3 pos, vec4 color);
#endif
void main()
{
vec2 tc = vary_fragcoord.xy;
float depth = texture2DRect(depthMap, tc.xy).r;
vec4 pos = getPositionWithDepth(tc, depth);
vec4 norm = texture2DRect(normalMap, tc);
float envIntensity = norm.z;
norm.xyz = getNorm(tc);
vec3 light_dir = (sun_up_factor == 1) ? sun_dir : moon_dir;
float da = dot(normalize(norm.xyz), light_dir.xyz);
da = clamp(da, -1.0, 1.0);
float final_da = da;
final_da = clamp(final_da, 0.0, 1.0);
vec4 diffuse_linear = texture2DRect(diffuseRect, tc);
vec4 diffuse_srgb = vec4(linear_to_srgb(diffuse_linear.rgb), diffuse_linear.a);
vec4 spec = texture2DRect(specularRect, vary_fragcoord.xy);
vec3 color = vec3(0);
float bloom = 0.0;
{
float ambocc = 1.0; // no AO...
vec3 sunlit;
vec3 amblit;
vec3 additive;
vec3 atten;
calcAtmosphericVars(pos.xyz, ambocc, sunlit, amblit, additive, atten);
float ambient = da;
ambient *= 0.5;
ambient *= ambient;
ambient = (1.0 - ambient);
vec3 sun_contrib = final_da * sunlit;
#if !defined(AMBIENT_KILL)
color.rgb = pow(amblit, vec3(1.0/1.3));
color.rgb *= ambient;
#endif
vec3 post_ambient = color.rgb;
#if !defined(SUNLIGHT_KILL)
color.rgb += sun_contrib;
#endif
vec3 post_sunlight = color.rgb;
color.rgb *= diffuse_linear.rgb;
vec3 post_diffuse = color.rgb;
vec3 refnormpersp = normalize(reflect(pos.xyz, norm.xyz));
if (spec.a > 0.0) // specular reflection
{
vec3 npos = -normalize(pos.xyz);
//vec3 ref = dot(pos+lv, norm);
vec3 h = normalize(light_dir.xyz+npos);
float nh = dot(norm.xyz, h);
float nv = dot(norm.xyz, npos);
float vh = dot(npos, h);
float sa = nh;
float fres = pow(1 - dot(h, npos), 5)*0.4+0.5;
float gtdenom = 2 * nh;
float gt = max(0, min(gtdenom * nv / vh, gtdenom * da / vh));
if (nh > 0.0)
{
float scontrib = fres*texture2D(lightFunc, vec2(nh, spec.a)).r*gt/(nh*da);
vec3 sp = sun_contrib*scontrib / 16.0;
sp = clamp(sp, vec3(0), vec3(1));
bloom += dot(sp, sp) / 6.0;
#if !defined(SUNLIGHT_KILL)
color += sp * spec.rgb;
#endif
}
}
vec3 post_spec = color.rgb;
#ifndef WATER_FOG
color.rgb += diffuse_srgb.rgb * diffuse_srgb.a;
#endif
if (envIntensity > 0.0)
{ //add environmentmap
vec3 env_vec = env_mat * refnormpersp;
vec3 reflected_color = textureCube(environmentMap, env_vec).rgb;
#if !defined(SUNLIGHT_KILL)
color = mix(color.rgb, reflected_color, envIntensity);
#endif
}
vec3 post_env = color.rgb;
if (norm.w < 1)
{
#if !defined(SUNLIGHT_KILL)
color = atmosFragLighting(color, additive, atten);
color = scaleSoftClipFrag(color);
#endif
}
vec3 post_atmo = color.rgb;
#ifdef WATER_FOG
vec4 fogged = applyWaterFogView(pos.xyz,vec4(color, bloom));
color = fogged.rgb;
bloom = fogged.a;
#endif
// srgb colorspace debuggables
//color.rgb = amblit;
//color.rgb = sunlit;
//color.rgb = post_ambient;
//color.rgb = sun_contrib;
//color.rgb = post_sunlight;
//color.rgb = diffuse_srgb.rgb;
//color.rgb = post_diffuse;
//color.rgb = post_spec;
//color.rgb = post_env;
//color.rgb = post_atmo;
// convert to linear as fullscreen lights need to sum in linear colorspace
// and will be gamma (re)corrected downstream...
color.rgb = srgb_to_linear(color.rgb);
}
// linear debuggables
//color.rgb = vec3(final_da);
//color.rgb = vec3(ambient);
//color.rgb = vec3(scol);
frag_color.rgb = color.rgb;
frag_color.a = bloom;
}
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