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/**
* @file class1/deferred/gbufferUtil.glsl
*
* $LicenseInfo:firstyear=2024&license=viewerlgpl$
* 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
* $/LicenseInfo$
*/
uniform sampler2D diffuseRect;
uniform sampler2D specularRect;
#if defined(HAS_EMISSIVE)
uniform sampler2D emissiveRect;
#endif
vec4 getNormRaw(vec2 screenpos);
vec4 decodeNormal(vec4 norm);
GBufferInfo getGBuffer(vec2 screenpos)
{
GBufferInfo ret;
vec4 diffInfo = vec4(0);
vec4 specInfo = vec4(0);
vec4 emissInfo = vec4(0);
diffInfo = texture(diffuseRect, screenpos.xy);
specInfo = texture(specularRect, screenpos.xy);
vec4 normInfo = getNormRaw(screenpos);
#if defined(HAS_EMISSIVE)
emissInfo = texture(emissiveRect, screenpos.xy);
#endif
ret.albedo = diffInfo;
ret.normal = decodeNormal(normInfo).xyz;
ret.specular = specInfo;
ret.envIntensity = normInfo.b;
ret.gbufferFlag = normInfo.w;
ret.emissive = emissInfo;
return ret;
}
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