1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
/**
* @file postDeferredF.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 gl_FragColor;
#endif
uniform sampler2DRect diffuseRect;
uniform sampler2DRect edgeMap;
uniform sampler2DRect depthMap;
uniform sampler2DRect normalMap;
uniform sampler2D bloomMap;
uniform float depth_cutoff;
uniform float norm_cutoff;
uniform float focal_distance;
uniform float blur_constant;
uniform float tan_pixel_angle;
uniform float magnification;
uniform mat4 inv_proj;
uniform vec2 screen_res;
VARYING vec2 vary_fragcoord;
float getDepth(vec2 pos_screen)
{
float z = texture2DRect(depthMap, pos_screen.xy).r;
z = z*2.0-1.0;
vec4 ndc = vec4(0.0, 0.0, z, 1.0);
vec4 p = inv_proj*ndc;
return p.z/p.w;
}
float calc_cof(float depth)
{
float sc = abs(depth-focal_distance)/-depth*blur_constant;
sc /= magnification;
// tan_pixel_angle = pixel_length/-depth;
float pixel_length = tan_pixel_angle*-focal_distance;
sc = sc/pixel_length;
sc *= 1.414;
return sc;
}
void dofSampleNear(inout vec4 diff, inout float w, float cur_sc, vec2 tc)
{
float d = getDepth(tc);
float sc = calc_cof(d);
float wg = 0.25;
vec4 s = texture2DRect(diffuseRect, tc);
// de-weight dull areas to make highlights 'pop'
wg += s.r+s.g+s.b;
diff += wg*s;
w += wg;
}
void dofSample(inout vec4 diff, inout float w, float min_sc, float cur_depth, vec2 tc)
{
float d = getDepth(tc);
float sc = calc_cof(d);
if (sc > min_sc //sampled pixel is more "out of focus" than current sample radius
|| d < cur_depth) //sampled pixel is further away than current pixel
{
float wg = 0.25;
vec4 s = texture2DRect(diffuseRect, tc);
// de-weight dull areas to make highlights 'pop'
wg += s.r+s.g+s.b;
diff += wg*s;
w += wg;
}
}
void main()
{
vec3 norm = texture2DRect(normalMap, vary_fragcoord.xy).xyz;
norm = vec3((norm.xy-0.5)*2.0,norm.z); // unpack norm
vec2 tc = vary_fragcoord.xy;
float depth = getDepth(tc);
vec4 diff = texture2DRect(diffuseRect, vary_fragcoord.xy);
{
float w = 1.0;
float sc = calc_cof(depth);
sc = min(abs(sc), 10.0);
float fd = depth*0.5f;
float PI = 3.14159265358979323846264;
// sample quite uniformly spaced points within a circle, for a circular 'bokeh'
//if (depth < focal_distance)
{
while (sc > 0.5)
{
int its = int(max(1.0,(sc*3.7)));
for (int i=0; i<its; ++i)
{
float ang = sc+i*2*PI/its; // sc is added for rotary perturbance
float samp_x = sc*sin(ang);
float samp_y = sc*cos(ang);
// you could test sample coords against an interesting non-circular aperture shape here, if desired.
dofSample(diff, w, sc, depth, vary_fragcoord.xy + vec2(samp_x,samp_y));
}
sc -= 1.0;
}
}
diff /= w;
}
vec4 bloom = texture2D(bloomMap, vary_fragcoord.xy/screen_res);
gl_FragColor = diff + bloom;
}
|
