From 2bc8c17a1b5c0ce6f45b60ad208fd358729f1b73 Mon Sep 17 00:00:00 2001
From: Christoph Helma <helma@in-silico.ch>
Date: Mon, 29 Apr 2019 16:15:21 +0200
Subject: initial commit

---
 shader.frag | 147 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 147 insertions(+)
 create mode 100644 shader.frag

(limited to 'shader.frag')

diff --git a/shader.frag b/shader.frag
new file mode 100644
index 0000000..7cb10b0
--- /dev/null
+++ b/shader.frag
@@ -0,0 +1,147 @@
+#version 450 core
+
+uniform int ticks;
+uniform int scene;
+uniform float params[8];
+
+uniform sampler2D images[8];
+uniform vec2 resolution;
+
+layout (binding = 0,rgba32f) restrict uniform image2D backbuffer;
+
+int selection[12];
+
+out vec4 fragColor;
+
+float random (in float x) {
+    return fract(sin(x)*43758.5453123);
+}
+
+vec2 zoom(vec2 st, vec2 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;
+}
+
+void main (void) {
+  vec2 uv = gl_FragCoord.xy/resolution.xy;
+  vec4 feedback = imageLoad(backbuffer,ivec2(gl_FragCoord.xy));
+  if (scene == 0) {
+    vec4 logo = texture2D(images[0], zoom(uv,vec2(0.5+0.1*params[2],0.2+0.025*params[0])));
+    fragColor = mix(logo,feedback,0.7);
+  }
+  else if (scene == 1) {
+    vec4 logo = texture2D(images[0], zoom(uv,vec2(0.5+0.1*params[2],0.2+0.025*params[0])));
+    vec4 img = texture2D(images[1],uv);
+    float fade = ticks % (24*16)/(24*16.0);
+    fragColor = mix(logo,img,fade);
+    fragColor = mix(fragColor,feedback,0.7);
+  }
+  else if (scene == 2) {
+    vec4 img = texture2D(images[1],zoom(uv,vec2(1.05-0.1*params[1])));
+    fragColor = mix(img,feedback,0.3);
+  }
+  else if (scene == 3) {
+    vec4 img = texture2D(images[1],uv);
+    img.rgb += 0.3 - vec3(params[0],params[1],params[2]);
+    fragColor = mix(img,feedback,0.9);
+  }
+  else if (scene == 4) {
+    float fade = ticks % (24*16)/(24*16.0);
+    vec2 st = zoom(uv,vec2(1.05-0.1*params[1]));
+    vec4 img = texture2D(images[1],st);
+    img.rgb += 0.3 - vec3(params[0],params[1],params[2]);
+    uv -= 0.5;
+    uv *= 0.995-1.5*(vec2(random(float(ticks)),random(float(ticks)/417.94))-0.5)/vec2(120.,80.);
+    uv += 0.5;
+    vec4 newimg = texture2D(images[2],uv);
+    fragColor = max(newimg*params[1],img);//;
+    fragColor = mix(fragColor,feedback,0.5);
+  }
+  else if (scene == 5) {
+    uv -= 0.5;
+    if (feedback.r < feedback.b) { uv *= 0.995-2.5*(vec2(params[0]-0.5)/vec2(120.0,80.0)); }
+    uv += 0.5;
+    vec4 img = texture2D(images[2],uv);
+    fragColor = mix(img,feedback,0.7);
+  }
+  else if (scene == 6) {
+    uv -= 0.5;
+    if (feedback.r > feedback.b) {
+      if (params[1] > 0.3) uv *= 0.9-20.9*(vec2(random(float(ticks)),random(float(ticks)/417.94))-0.5)/vec2(120.,80.);
+    }
+    else if (params[2] > 0.5) { uv *= 0.995-1.7*(vec2(params[0]-0.5)/vec2(120.0,80.0)); }
+    uv += 0.5;
+    vec4 img = texture2D(images[2],uv);
+    fragColor = mix(img,feedback,0.3);
+  }
+  else if (scene == 7) {
+    uv -= 0.5;
+    if (feedback.r > feedback.b) { uv += 0.5-vec2(params[0],params[1]); }
+    else if (params[2] > 0.5) { uv *= 0.995-1.5*(vec2(random(float(ticks)),random(float(ticks)/417.94))-0.5)/vec2(120.,80.); }
+    uv += 0.5;
+    vec4 img = texture2D(images[2],uv);
+    //if (feedback.r < feedback.b) { img *= 1.5*params[0]; }
+    if (feedback.r < feedback.b) { img += 0.2-0.5*params[0]; }
+    fragColor = mix(img,feedback,0.9);
+  }
+  else if (scene == 8) {
+    vec4 newimg = texture2D(images[3],zoom(uv,vec2(1.05-0.05*params[0])));
+    uv -= 0.5;
+    if (feedback.r > feedback.b) { uv += 0.5-vec2(params[0],params[1]); }
+    else if (params[2] > 0.5) { uv *= 0.995-1.5*(vec2(random(float(ticks)),random(float(ticks)/417.94))-0.5)/vec2(120.,80.); }
+    uv += 0.5;
+    vec4 img = texture2D(images[2],uv);
+    float fade = ticks % (24*16)/(24*16.0);
+    img -= fade;
+    fragColor = max(img,newimg*fade);
+    fragColor = mix(fragColor,feedback,0.9);
+  }
+  else if (scene == 9) {
+    vec4 img = texture2D(images[3],zoom(uv,vec2(1.05-0.05*params[0],1.05-0.1*params[2])));
+    fragColor = mix(img,feedback,0.2);
+  }
+  else if (scene == 10) {
+    vec4 img = texture2D(images[3],zoom(uv,vec2(1.05-0.05*params[0],1.05-0.1*params[2])));
+    vec4 static_img = texture2D(images[3],uv);
+    float fade = ticks % (24*16)/(24*16.0);
+    static_img *= fade;
+    if (static_img.b < static_img.g) { static_img += 2.0*params[1]; }
+    fragColor = max(img,static_img);
+    fragColor = mix(fragColor,feedback,0.3);
+  }
+  else if (scene == 11) {
+    vec4 img = texture2D(images[3],uv);
+    if (img.r+img.g+img.b > 2.0) { img.rgb += 2.5*vec3(params[0],params[1],params[2]); }
+    vec4 newimg = texture2D(images[1],translate(zoom(uv,vec2(0.7)),vec2(0.4,-0.20)));
+    if (params[1] > 0.1) {
+      if (newimg.b > 0.5) { img = max(newimg,img); }
+    }
+    fragColor = mix(img,feedback,0.7);
+  }
+  else if (scene == 12) {
+    vec4 logo = texture2D(images[4], zoom(uv,vec2(0.5,0.2)));
+    vec4 img = texture2D(images[3],zoom(uv,vec2(1.05-0.05*params[0],1.05-0.1*params[2])));
+    float fade = ticks % (24*16)/(24*16.0);
+    if (logo.r+logo.g+logo.b > 2.0) {
+    logo *= fade;
+    logo += params[1];
+    }
+    fragColor = max(img,logo);
+    fragColor = mix(fragColor,feedback,0.9);
+  }
+  else if (scene == 13) {
+    vec4 logo = texture2D(images[4], zoom(uv,vec2(0.5,0.2)));
+    vec4 img = texture2D(images[3],uv);
+    fragColor = img+logo;
+  }
+  imageStore(backbuffer, ivec2(gl_FragCoord.xy), fragColor);
+}
-- 
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