/*{
"CATEGORIES": [
"Film"
],
"CREDIT": "by VIDVOX",
"DESCRIPTION": "",
"INPUTS": [
{
"NAME": "inputImage",
"TYPE": "image"
},
{
"DEFAULT": -0.67,
"LABEL": "Bias",
"MAX": 0,
"MIN": -1,
"NAME": "uBias",
"TYPE": "float"
},
{
"DEFAULT": 1.25,
"LABEL": "Scale",
"MAX": 10,
"MIN": 0,
"NAME": "uScale",
"TYPE": "float"
},
{
"DEFAULT": 1,
"LABEL": "Source Gain",
"MAX": 1,
"MIN": 0,
"NAME": "uSource",
"TYPE": "float"
},
{
"DEFAULT": [
0.75,
0.875,
1,
0.75
],
"LABEL": "Chromatic Distortion",
"NAME": "uChromatic",
"TYPE": "color"
},
{
"DEFAULT": 3,
"LABEL": "Ghosts",
"MAX": 5,
"MIN": 0,
"NAME": "uGhosts",
"TYPE": "float"
},
{
"DEFAULT": 0.25,
"LABEL": "Ghost Dispersal",
"MAX": 0.75,
"MIN": 0.125,
"NAME": "uGhostDispersal",
"TYPE": "float"
},
{
"DEFAULT": [
0.67,
0.5,
0.75,
1
],
"LABEL": "Lens Color",
"NAME": "uLensColor",
"TYPE": "color"
},
{
"DEFAULT": 0.33,
"LABEL": "Halo Width",
"MAX": 1,
"MIN": 0,
"NAME": "uHaloWidth",
"TYPE": "float"
},
{
"DEFAULT": 0.25,
"LABEL": "Dirt",
"MAX": 1,
"MIN": 0,
"NAME": "uNoise",
"TYPE": "float"
},
{
"DEFAULT": [
0.5,
0.5
],
"LABEL": "Center",
"MAX": [
1,
1
],
"MIN": [
0,
0
],
"NAME": "uCenter",
"TYPE": "point2D"
}
],
"ISFVSN": "2",
"PASSES": [
{
"DESCRIPTION": "Downsample and threshold",
"HEIGHT": "floor($HEIGHT/2.0)",
"TARGET": "downsampleAndThresholdImage",
"WIDTH": "floor($WIDTH/2.0)"
},
{
"DESCRIPTION": "Feature generation",
"HEIGHT": "floor($HEIGHT/2.0)",
"TARGET": "featureGenerationImage",
"WIDTH": "floor($WIDTH/2.0)"
},
{
"DESCRIPTION": "Blur",
"HEIGHT": "floor($HEIGHT/4.0)",
"TARGET": "blurredImage",
"WIDTH": "floor($WIDTH/4.0)"
},
{
}
]
}
*/
// as a guide, http://john-chapman-graphics.blogspot.co.uk/2013/02/pseudo-lens-flare.html
// 1 downsample and threshold
// 2 feature generation: ghosts, halos and chromatic distortion
// 3 blur
// 4 upscale / blend
#if __VERSION__ <= 120
varying vec2 left_coord;
varying vec2 right_coord;
varying vec2 above_coord;
varying vec2 below_coord;
varying vec2 lefta_coord;
varying vec2 righta_coord;
varying vec2 leftb_coord;
varying vec2 rightb_coord;
#else
in vec2 left_coord;
in vec2 right_coord;
in vec2 above_coord;
in vec2 below_coord;
in vec2 lefta_coord;
in vec2 righta_coord;
in vec2 leftb_coord;
in vec2 rightb_coord;
#endif
const float seed = 0.87342;
float rand(vec2 co){
return fract(sin(dot(co.xy ,vec2(12.9898,78.233))) * 43758.5453);
}
void main()
{
if (PASSINDEX == 0) {
vec2 loc = isf_FragNormCoord;
gl_FragColor = max(vec4(0.0), IMG_NORM_PIXEL(inputImage,loc) + uBias) * uScale;
}
else if (PASSINDEX == 1) {
// flip the coordinates on this pass
vec2 centerVec = 2.0*(uCenter - vec2(0.5));
vec2 texcoord = vec2(1.0) - isf_FragNormCoord;
vec2 texelSize = 1.0 / RENDERSIZE;
vec2 ghostVec = (vec2(0.5) - texcoord + centerVec) * uGhostDispersal;
vec4 result = vec4(0.0);
for (int i = 0; i < 5; ++i) {
if (float(i)>uGhosts)
break;
vec2 offset = fract(texcoord + ghostVec * float(i));
//result += IMG_NORM_PIXEL(downsampleAndThresholdImage, offset);
result.r += IMG_NORM_PIXEL(downsampleAndThresholdImage, offset * uChromatic.r).r * uChromatic.a;
result.g += IMG_NORM_PIXEL(downsampleAndThresholdImage, offset * uChromatic.g).g * uChromatic.a;
result.b += IMG_NORM_PIXEL(downsampleAndThresholdImage, offset * uChromatic.b).b * uChromatic.a;
}
//vec4 result = vec4(0.0);
for (int i = 0; i < 5; ++i) {
if (float(i)>uGhosts)
break;
vec2 offset = fract(texcoord + ghostVec * float(i));
float weight = length(vec2(0.5) - offset) / length(vec2(0.5));
weight = pow(1.0 - weight, 10.0);
result += IMG_NORM_PIXEL(downsampleAndThresholdImage, offset) * weight;
}
vec2 haloVec = normalize(ghostVec) * uHaloWidth;
float weight = length(vec2(0.5) - fract(texcoord + haloVec)) / length(vec2(0.5));
weight = pow(1.0 - weight, 5.0);
result += IMG_NORM_PIXEL(downsampleAndThresholdImage, texcoord + haloVec) * weight;
result *= uLensColor;
gl_FragColor = result;
}
else if (PASSINDEX == 2) {
vec4 color = IMG_THIS_NORM_PIXEL(featureGenerationImage);
vec4 colorL = IMG_NORM_PIXEL(featureGenerationImage, left_coord);
vec4 colorR = IMG_NORM_PIXEL(featureGenerationImage, right_coord);
vec4 colorA = IMG_NORM_PIXEL(featureGenerationImage, above_coord);
vec4 colorB = IMG_NORM_PIXEL(featureGenerationImage, below_coord);
vec4 colorLA = IMG_NORM_PIXEL(featureGenerationImage, lefta_coord);
vec4 colorRA = IMG_NORM_PIXEL(featureGenerationImage, righta_coord);
vec4 colorLB = IMG_NORM_PIXEL(featureGenerationImage, leftb_coord);
vec4 colorRB = IMG_NORM_PIXEL(featureGenerationImage, rightb_coord);
vec4 avg = (color + colorL + colorR + colorA + colorB + colorLA + colorRA + colorLB + colorRB) / 9.0;
//avg = mix(color, (avg + depth*blur)/(1.0+depth), softness);
gl_FragColor = avg;
}
else {
vec2 loc = isf_FragNormCoord;
// SHOULD REPLACE THIS WITH A BETTER / ADJUSTABLE FILM GRAIN OR DIRT GENERATOR
vec4 noise = vec4(0.0);
noise = (1.0 - uNoise) + uNoise * vec4(rand(loc*vec2(uNoise*seed,uChromatic.x)),rand(loc*vec2(uNoise*seed,uChromatic.y)),rand(loc*vec2(uNoise*seed,uChromatic.z)),1.0);
vec4 srcColor = IMG_NORM_PIXEL(inputImage,loc);
vec4 lensFlareColor = IMG_NORM_PIXEL(blurredImage,loc) * noise;
gl_FragColor = uSource * srcColor + lensFlareColor * lensFlareColor.a;
}
}
