|
1
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
2
|
// Copyright 2016 Leszek Koltunski //
|
|
3
|
// //
|
|
4
|
// This file is part of Distorted. //
|
|
5
|
// //
|
|
6
|
// Distorted is free software: you can redistribute it and/or modify //
|
|
7
|
// it under the terms of the GNU General Public License as published by //
|
|
8
|
// the Free Software Foundation, either version 2 of the License, or //
|
|
9
|
// (at your option) any later version. //
|
|
10
|
// //
|
|
11
|
// Distorted is distributed in the hope that it will be useful, //
|
|
12
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
|
|
13
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
|
|
14
|
// GNU General Public License for more details. //
|
|
15
|
// //
|
|
16
|
// You should have received a copy of the GNU General Public License //
|
|
17
|
// along with Distorted. If not, see <http://www.gnu.org/licenses/>. //
|
|
18
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
19
|
|
|
20
|
precision lowp float;
|
|
21
|
|
|
22
|
uniform sampler2D u_Texture; // The input texture.
|
|
23
|
|
|
24
|
varying vec3 v_Position; // Interpolated position for this fragment.
|
|
25
|
varying vec3 v_Normal; // Interpolated normal for this fragment.
|
|
26
|
varying vec2 v_TexCoordinate; // Interpolated texture coordinate per fragment.
|
|
27
|
|
|
28
|
uniform int fNumEffects; // total number of fragment effects
|
|
29
|
|
|
30
|
#if NUM_FRAGMENT>0
|
|
31
|
uniform int fType[NUM_FRAGMENT]; // their types.
|
|
32
|
uniform vec4 fUniforms[2*NUM_FRAGMENT]; // i-th effect is 2 consecutive vec4's: [2*i], [2*i+1]. First vec4 is the Interpolated values,
|
|
33
|
// next describes the Region, i.e. area over which the effect is active.
|
|
34
|
|
|
35
|
const vec3 LUMI = vec3( 0.2125, 0.7154, 0.0721 );
|
|
36
|
|
|
37
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
38
|
// CHROMA EFFECT
|
|
39
|
|
|
40
|
void chroma(float degree, int effect, inout vec4 color)
|
|
41
|
{
|
|
42
|
color.rgb = mix(color.rgb, fUniforms[effect].yzw, degree*fUniforms[effect].x);
|
|
43
|
}
|
|
44
|
|
|
45
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
46
|
// ALPHA EFFECT (change transparency level)
|
|
47
|
|
|
48
|
void alpha(float degree, int effect, inout vec4 color)
|
|
49
|
{
|
|
50
|
color.a *= (degree*(fUniforms[effect].x-1.0)+1.0);
|
|
51
|
}
|
|
52
|
|
|
53
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
54
|
// BRIGHTNESS EFFECT
|
|
55
|
|
|
56
|
void brightness(float degree, int effect, inout vec4 color)
|
|
57
|
{
|
|
58
|
color.rgb = mix(vec3(0.0,0.0,0.0), color.rgb, degree*(fUniforms[effect].x-1.0)+1.0 );
|
|
59
|
}
|
|
60
|
|
|
61
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
62
|
// CONTRAST EFFECT
|
|
63
|
|
|
64
|
void contrast(float degree, int effect, inout vec4 color)
|
|
65
|
{
|
|
66
|
color.rgb = mix(vec3(0.5,0.5,0.5), color.rgb, degree*(fUniforms[effect].x-1.0)+1.0 );
|
|
67
|
}
|
|
68
|
|
|
69
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
70
|
// SATURATION EFFECT
|
|
71
|
|
|
72
|
void saturation(float degree, int effect, inout vec4 color)
|
|
73
|
{
|
|
74
|
float luminance = dot(LUMI,color.rgb);
|
|
75
|
color.rgb = mix(vec3(luminance,luminance,luminance), color.rgb, degree*(fUniforms[effect].x-1.0)+1.0 );
|
|
76
|
}
|
|
77
|
|
|
78
|
#endif
|
|
79
|
|
|
80
|
//////////////////////////////////////////////////////////////////////////////////////////////
|
|
81
|
|
|
82
|
void main()
|
|
83
|
{
|
|
84
|
vec4 pixel = texture2D(u_Texture,v_TexCoordinate);
|
|
85
|
|
|
86
|
#if NUM_FRAGMENT>0
|
|
87
|
vec2 diff;
|
|
88
|
float pointDegree;
|
|
89
|
|
|
90
|
for(int i=0; i<fNumEffects; i++)
|
|
91
|
{
|
|
92
|
diff = (v_Position.xy - fUniforms[2*i+1].xy)/fUniforms[2*i+1].zw;
|
|
93
|
pointDegree = max(0.0,1.0-dot(diff,diff));
|
|
94
|
|
|
95
|
if( fType[i]==CHROMA ) chroma (sign(pointDegree),2*i,pixel);
|
|
96
|
else if( fType[i]==SMOOTH_CHROMA ) chroma ( pointDegree ,2*i,pixel);
|
|
97
|
else if( fType[i]==ALPHA ) alpha (sign(pointDegree),2*i,pixel);
|
|
98
|
else if( fType[i]==SMOOTH_ALPHA ) alpha ( pointDegree ,2*i,pixel);
|
|
99
|
else if( fType[i]==BRIGHTNESS ) brightness(sign(pointDegree),2*i,pixel);
|
|
100
|
else if( fType[i]==SMOOTH_BRIGHTNESS ) brightness( pointDegree ,2*i,pixel);
|
|
101
|
else if( fType[i]==CONTRAST ) contrast (sign(pointDegree),2*i,pixel);
|
|
102
|
else if( fType[i]==SMOOTH_CONTRAST ) contrast ( pointDegree ,2*i,pixel);
|
|
103
|
else if( fType[i]==SATURATION ) saturation(sign(pointDegree),2*i,pixel);
|
|
104
|
else if( fType[i]==SMOOTH_SATURATION ) saturation( pointDegree ,2*i,pixel);
|
|
105
|
}
|
|
106
|
#endif
|
|
107
|
|
|
108
|
gl_FragColor = vec4(pixel.rgb * v_Normal.z, pixel.a);
|
|
109
|
}
|