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/**
* @file fullbrightF.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
#ifdef DEFINE_GL_FRAGCOLOR
out vec4 frag_color;
#else
#define frag_color gl_FragColor
#endif
#if !HAS_DIFFUSE_LOOKUP
uniform sampler2D diffuseMap;
#endif
VARYING vec3 vary_position;
VARYING vec4 vertex_color;
VARYING vec2 vary_texcoord0;
vec3 fullbrightAtmosTransport(vec3 light);
vec3 fullbrightScaleSoftClip(vec3 light);
#ifdef HAS_ALPHA_MASK
uniform float minimum_alpha;
#endif
#ifdef WATER_FOG
uniform vec4 waterPlane;
uniform vec4 waterFogColor;
uniform float waterFogDensity;
uniform float waterFogKS;
vec4 applyWaterFogDeferred(vec3 pos, vec4 color)
{
//normalize view vector
vec3 view = normalize(pos);
float es = -(dot(view, waterPlane.xyz));
//find intersection point with water plane and eye vector
//get eye depth
float e0 = max(-waterPlane.w, 0.0);
vec3 int_v = waterPlane.w > 0.0 ? view * waterPlane.w/es : vec3(0.0, 0.0, 0.0);
//get object depth
float depth = length(pos - int_v);
//get "thickness" of water
float l = max(depth, 0.1);
float kd = waterFogDensity;
float ks = waterFogKS;
vec4 kc = waterFogColor;
float F = 0.98;
float t1 = -kd * pow(F, ks * e0);
float t2 = kd + ks * es;
float t3 = pow(F, t2*l) - 1.0;
float L = min(t1/t2*t3, 1.0);
float D = pow(0.98, l*kd);
color.rgb = color.rgb * D + kc.rgb * L;
color.a = kc.a + color.a;
return color;
}
#endif
vec3 srgb_to_linear(vec3 cs)
{
/* { cs / 12.92, cs <= 0.04045
cl = {
{ ((cs + 0.055)/1.055)^2.4, cs > 0.04045*/
return pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
}
vec3 linear_to_srgb(vec3 cl)
{
/*{ 0.0, 0 <= cl
{ 12.92 * c, 0 < cl < 0.0031308
cs = { 1.055 * cl^0.41666 - 0.055, 0.0031308 <= cl < 1
{ 1.0, cl >= 1*/
return 1.055 * pow(cl, vec3(0.41666)) - 0.055;
}
void main()
{
#if HAS_DIFFUSE_LOOKUP
vec4 color = diffuseLookup(vary_texcoord0.xy);
#else
vec4 color = texture2D(diffuseMap, vary_texcoord0.xy);
#endif
float final_alpha = color.a * vertex_color.a;
#ifdef HAS_ALPHA_MASK
if (color.a < minimum_alpha)
{
discard;
}
#endif
color.rgb *= vertex_color.rgb;
color.rgb = srgb_to_linear(color.rgb);
color.rgb = fullbrightAtmosTransport(color.rgb);
color.rgb = fullbrightScaleSoftClip(color.rgb);
color.rgb = linear_to_srgb(color.rgb);
#ifdef WATER_FOG
vec3 pos = vary_position;
vec4 fogged = applyWaterFogDeferred(pos, vec4(color.rgb, final_alpha));
color.rgb = fogged.rgb;
color.a = fogged.a;
#endif
frag_color.rgb = color.rgb;
frag_color.a = color.a;
}
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