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/**
* @file dofCombineF.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
/*[EXTRA_CODE_HERE]*/
#ifdef DEFINE_GL_FRAGCOLOR
out vec4 frag_color;
#else
#define frag_color gl_FragColor
#endif
uniform sampler2D diffuseRect;
uniform sampler2D lightMap;
uniform mat4 inv_proj;
uniform vec2 screen_res;
uniform float max_cof;
uniform float res_scale;
uniform float dof_width;
uniform float dof_height;
VARYING vec2 vary_fragcoord;
vec4 dofSample(sampler2D tex, vec2 tc)
{
tc.x = min(tc.x, dof_width);
tc.y = min(tc.y, dof_height);
return texture2D(tex, tc);
}
void main()
{
vec2 tc = vary_fragcoord.xy;
vec4 dof = dofSample(diffuseRect, vary_fragcoord.xy*res_scale);
vec4 diff = texture2D(lightMap, vary_fragcoord.xy);
float a = min(abs(diff.a*2.0-1.0) * max_cof*res_scale*res_scale, 1.0);
if (a > 0.25 && a < 0.75)
{ //help out the transition a bit
float sc = a/res_scale;
vec4 col;
col = texture2D(lightMap, vary_fragcoord.xy+vec2(sc,sc)/screen_res);
col += texture2D(lightMap, vary_fragcoord.xy+vec2(-sc,sc)/screen_res);
col += texture2D(lightMap, vary_fragcoord.xy+vec2(sc,-sc)/screen_res);
col += texture2D(lightMap, vary_fragcoord.xy+vec2(-sc,-sc)/screen_res);
diff = mix(diff, col*0.25, a);
}
frag_color = mix(diff, dof, a);
}
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