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/**
* @file class3/deferred/screenSpaceReflPostF.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
* $/LicenseInfo$
*/
/*[EXTRA_CODE_HERE]*/
out vec4 frag_color;
uniform vec2 screen_res;
uniform mat4 projection_matrix;
uniform mat4 inv_proj;
uniform float zNear;
uniform float zFar;
in vec2 vary_fragcoord;
in vec3 camera_ray;
uniform sampler2D specularRect;
uniform sampler2D diffuseRect;
uniform sampler2D diffuseMap;
vec3 getNorm(vec2 screenpos);
float getDepth(vec2 pos_screen);
float linearDepth(float d, float znear, float zfar);
float linearDepth01(float d, float znear, float zfar);
vec4 getPositionWithDepth(vec2 pos_screen, float depth);
vec4 getPosition(vec2 pos_screen);
vec4 getNormalEnvIntensityFlags(vec2 screenpos, out vec3 n, out float envIntensity);
float random (vec2 uv);
float tapScreenSpaceReflection(int totalSamples, vec2 tc, vec3 viewPos, vec3 n, inout vec4 collectedColor, sampler2D source, float glossiness);
void main()
{
vec2 tc = vary_fragcoord.xy;
float depth = linearDepth01(getDepth(tc), zNear, zFar);
float envIntensity;
vec3 n;
vec4 norm = getNormalEnvIntensityFlags(tc, n, envIntensity); // need `norm.w` for GET_GBUFFER_FLAG()
vec3 pos = getPositionWithDepth(tc, getDepth(tc)).xyz;
vec4 spec = texture(specularRect, tc);
vec2 hitpixel;
vec4 diffuse = texture(diffuseRect, tc);
vec3 specCol = spec.rgb;
vec4 fcol = texture(diffuseMap, tc);
if (GET_GBUFFER_FLAG(GBUFFER_FLAG_HAS_PBR))
{
vec3 orm = specCol.rgb;
float perceptualRoughness = orm.g;
float metallic = orm.b;
vec3 f0 = vec3(0.04);
vec3 baseColor = diffuse.rgb;
vec3 diffuseColor = baseColor.rgb*(vec3(1.0)-f0);
specCol = mix(f0, baseColor.rgb, metallic);
}
vec4 collectedColor = vec4(0);
float w = tapScreenSpaceReflection(4, tc, pos, n, collectedColor, diffuseMap, 0);
collectedColor.rgb *= specCol.rgb;
fcol += collectedColor * w;
frag_color = max(fcol, vec4(0));
}
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