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/**
* @file class3/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
#define FLT_MAX 3.402823466e+38
#define REFMAP_COUNT 256
#define REF_SAMPLE_COUNT 64 //maximum number of samples to consider
#ifdef DEFINE_GL_FRAGCOLOR
out vec4 frag_color;
#else
#define frag_color gl_FragColor
#endif
uniform sampler2DRect diffuseRect;
uniform sampler2DRect specularRect;
uniform sampler2DRect normalMap;
#if defined(HAS_SUN_SHADOW) || defined(HAS_SSAO)
uniform sampler2DRect lightMap;
#endif
uniform sampler2DRect depthMap;
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, vec3 light_dir, float ambFactor, out vec3 sunlit, out vec3 amblit, out vec3 additive, out vec3 atten, bool use_ao);
float getAmbientClamp();
vec3 atmosFragLighting(vec3 l, vec3 additive, vec3 atten);
vec3 scaleSoftClipFrag(vec3 l);
vec3 fullbrightAtmosTransportFrag(vec3 light, vec3 additive, vec3 atten);
vec3 fullbrightScaleSoftClip(vec3 light);
// reflection probe interface
void sampleReflectionProbes(inout vec3 ambenv, inout vec3 glossenv, inout vec3 legacyEnv,
vec3 pos, vec3 norm, float glossiness, float envIntensity);
void applyGlossEnv(inout vec3 color, vec3 glossenv, vec4 spec, vec3 pos, vec3 norm);
void applyLegacyEnv(inout vec3 color, vec3 legacyenv, vec4 spec, vec3 pos, vec3 norm, float envIntensity);
vec3 linear_to_srgb(vec3 c);
vec3 srgb_to_linear(vec3 c);
#ifdef WATER_FOG
vec4 applyWaterFogView(vec3 pos, vec4 color);
#endif
uniform vec3 view_dir; // PBR
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 = clamp(dot(norm.xyz, light_dir.xyz), 0.0, 1.0);
float light_gamma = 1.0 / 1.3;
da = pow(da, light_gamma);
vec4 diffuse = texture2DRect(diffuseRect, tc);
diffuse.rgb = linear_to_srgb(diffuse.rgb); // SL-14025
vec4 spec = texture2DRect(specularRect, vary_fragcoord.xy);
#if defined(HAS_SUN_SHADOW) || defined(HAS_SSAO)
vec2 scol_ambocc = texture2DRect(lightMap, vary_fragcoord.xy).rg;
scol_ambocc = pow(scol_ambocc, vec2(light_gamma));
float scol = max(scol_ambocc.r, diffuse.a);
float ambocc = scol_ambocc.g;
#else
float scol = 1.0;
float ambocc = 1.0;
#endif
vec3 color = vec3(0);
float bloom = 0.0;
vec3 sunlit;
vec3 amblit;
vec3 additive;
vec3 atten;
calcAtmosphericVars(pos.xyz, light_dir, ambocc, sunlit, amblit, additive, atten, true);
//vec3 amb_vec = env_mat * norm.xyz;
vec3 ambenv;
vec3 glossenv;
vec3 legacyenv;
sampleReflectionProbes(ambenv, glossenv, legacyenv, pos.xyz, norm.xyz, spec.a, envIntensity);
amblit = max(ambenv, amblit);
color.rgb = amblit*ambocc;
//float ambient = min(abs(dot(norm.xyz, sun_dir.xyz)), 1.0);
//ambient *= 0.5;
//ambient *= ambient;
//ambient = (1.0 - ambient);
//color.rgb *= ambient;
vec3 sun_contrib = min(da, scol) * sunlit;
color.rgb += sun_contrib;
color.rgb = min(color.rgb, vec3(1,1,1));
color.rgb *= diffuse.rgb;
vec3 refnormpersp = reflect(pos.xyz, norm.xyz);
if (spec.a > 0.0) // specular reflection
{
float sa = dot(normalize(refnormpersp), light_dir.xyz);
vec3 dumbshiny = sunlit * scol * (texture2D(lightFunc, vec2(sa, spec.a)).r);
// add the two types of shiny together
vec3 spec_contrib = dumbshiny * spec.rgb;
bloom = dot(spec_contrib, spec_contrib) / 6;
color.rgb += spec_contrib;
// add reflection map - EXPERIMENTAL WORK IN PROGRESS
applyGlossEnv(color, glossenv, spec, pos.xyz, norm.xyz);
}
color.rgb = mix(color.rgb, diffuse.rgb, diffuse.a);
if (envIntensity > 0.0)
{ // add environmentmap
//fudge darker
legacyenv *= 0.5*diffuse.a+0.5;;
applyLegacyEnv(color, legacyenv, spec, pos.xyz, norm.xyz, envIntensity);
}
if (norm.w < 0.5)
{
color = mix(atmosFragLighting(color, additive, atten), fullbrightAtmosTransportFrag(color, additive, atten), diffuse.a);
color = mix(scaleSoftClipFrag(color), fullbrightScaleSoftClip(color), diffuse.a);
}
#ifdef WATER_FOG
vec4 fogged = applyWaterFogView(pos.xyz, vec4(color, bloom));
color = fogged.rgb;
bloom = fogged.a;
#endif
// convert to linear as fullscreen lights need to sum in linear colorspace
// and will be gamma (re)corrected downstream...
//color = vec3(ambocc);
//color = ambenv;
//color.b = diffuse.a;
frag_color.rgb = srgb_to_linear(color.rgb);
frag_color.a = bloom;
}
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