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#version 450 core
#ifdef GL_ES
precision mediump float;
#endif
uniform vec2 resolution;
uniform float time;
uniform float ticks;
uniform int program;
uniform sampler2D images[8];
layout (binding = 0,rgba32f) uniform image2D backbuffer;
uniform float params[4];
out vec4 fragColor;
float random (in float x) {
return fract(sin(x)*43758.5453123)-0.5;
}
vec2 st() {
return gl_FragCoord.xy/resolution.xy;
}
ivec2 ist() {
return ivec2(gl_FragCoord.xy/resolution.xy*resolution);
}
vec2 zoom(vec2 st, float amount) {
st -= 0.5;
st *= amount;
st += 0.5;
return st;
}
vec2 translate(vec2 st, vec2 amount) {
st -= 0.5;
st += amount;
st += 0.5;
return st;
}
vec2 rotate(vec2 st, float angle) {
st -= 0.5;
st *= angle;
st += 0.5;
return st;
}
mat2 rotate2d(float _angle){
return mat2(cos(_angle),-sin(_angle), sin(_angle),cos(_angle));
}
void main (void) {
vec4 img;
vec2 coord;
if (program == 0) {
coord = zoom(st(),1.0-0.5*(1.0-params[0]));
img = texture2D(images[0],coord);
vec2 tc = st();
tc = zoom(tc,2.0);
tc.y *= 1.5;
tc = translate(tc,vec2(-0.35,0.55));
vec4 title = texture2D(images[1],tc);
img -= params[1]*0.7*title;
}
else if (program == 1) {
coord = zoom(st(),1.0-0.5*(1.0-params[0]));
img = texture2D(images[0],coord);
coord = zoom(st(),1.0-0.5*(1.0-params[2]));
coord = translate(coord,vec2(-0.1,-0.1));
vec3 i2 = texture2D(images[2],coord).rgb;
img.rgb = 2.5*pow((1.0-2.3*img.rgb),1.0+(1.0-params[1])*2*i2);
}
else if (program == 2) {
coord = zoom(st(),1.0-0.5*(1.0-params[2]));
coord = translate(coord,vec2(-0.1,-0.1));
img = texture2D(images[2],coord);
coord = zoom(st(),1.0-0.5*(1.0-params[0]));
vec3 i2 = texture2D(images[0],coord).rgb;
img.rgb = pow((1.0-2.3*img.rgb),1.0+(1.0-params[1])*2*i2);
}
else if (program == 3) {
coord = zoom(st(),1.0-0.5*(1.0-params[0]));
coord = rotate(coord,0.1);
img = texture2D(images[3],coord);
coord = zoom(st(),0.7-0.5*(1.0-params[2]));
coord = translate(coord,vec2(-0.1,0.2));
vec3 i2 = texture2D(images[2],coord).rgb;
img.rgb = pow((1.0-2.3*img.rgb),params[3]*5*i2);
/*
coord = st() + 0.5;
coord -= 0.5;
img = texture2D(images[3],coord);
coord = zoom(st(),0.5*(1.0-0.5*params[0]));
coord = rotate2d(sin(ticks))*coord;
vec3 i2 = texture2D(images[0],coord).rgb;
img.rgb = 2.0*pow((1.0-2.0*i2),params[3]*50*img.rgb);
*/
}
else if (program == 4) {
coord = zoom(st(),(1.0-1.5*params[0]));
img = texture2D(images[3],coord);
coord = zoom(st(),0.5*(1.0-0.5*params[2]));
coord = translate(coord,vec2(0.2,0.15));
coord = rotate(coord,-0.1);
vec3 i2 = texture2D(images[2],coord).rgb;
img.rgb = pow((1.0-2.3*img.rgb),params[3]*5*i2);
}
else if (program == 5) {
coord = zoom(st(),(1.0-1.5*params[0]));
img = texture2D(images[2],coord);
coord = zoom(st(),0.5*(1.0-0.5*params[2]));
coord = translate(coord,vec2(0.2,0.15));
vec3 i2 = texture2D(images[3],coord).rgb;
img.rgb = pow(img.rgb,5*i2);
}
else if (program == 6) {
coord = zoom(st(),(1.0-1.5*params[0]));
img = texture2D(images[2],coord);
coord = zoom(st(),0.5*(1.0-0.5*params[2]));
coord = translate(coord,vec2(0.2,0.15));
vec3 i2 = texture2D(images[3],coord).rgb;
img.rgb = pow(img.rgb,5*i2);
vec2 tc = st();
tc = zoom(tc,2.0);
tc.y *= 1.5;
tc = translate(tc,vec2(-0.35,0.15));
vec4 title = texture2D(images[1],tc);
tc = st();
tc = zoom(tc,2.0);
tc = translate(tc,vec2(-0.35,0.35));
tc.y *= 3.5;
vec4 subtitle = texture2D(images[4],tc);
img += params[3]*title + subtitle;
}
imageStore(backbuffer,ist(),img);
if (program != 0) {
vec4 feedback = imageLoad(backbuffer,ist());
img = mix(feedback,img,0.4);
}
fragColor = img;
/*
fragColor = vec4(params[1]);
feedback.b += 0.01*cos(time/4.);
color.r = max(i.r,feedback.r);
*/
}
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