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https://github.com/screentinker/screentinker.git
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96b71a0d56
Client-side GL Transitions v1 across all three players with never-blank degradation: shader lib + generated manifest + real-WebGL CI, transition-as-widget normalization, persistent WebGL/GLES2 compositors (web/Tizen/native Android), image↔video wipes, SSRF-hardened media proxy, decode-gated image preload, dashboard picker. Fixes the playlist change-fingerprint that dropped transition edits. Alpha + on-device soak validated.
36 lines
1.3 KiB
GLSL
36 lines
1.3 KiB
GLSL
// Fiber Splice
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// blurb: Two ends draw apart, the arc fires, and the new frame fuses in from the seam.
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// Author: Dan (ByteTinker)
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// License: MIT
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// GL Transitions v1 — GLSL ES 1.0, runs unmodified in WebGL1 and Android GLES2.
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uniform float separation; // = 0.30 [0.0..0.5]
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uniform float arcGain; // = 1.8 [0.0..4.0]
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uniform float arcTight; // = 26.0 [4.0..80.0]
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uniform float flicker; // = 0.5 [0.0..1.0]
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float bt_hash(vec2 p){ return fract(sin(dot(p, vec2(127.1, 311.7))) * 43758.5453123); }
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vec4 transition(vec2 uv){
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float x = uv.x;
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float ph = clamp(progress / 0.46, 0.0, 1.0);
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float pb = clamp((progress - 0.54) / 0.46, 0.0, 1.0);
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vec3 col = vec3(0.0);
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if(progress < 0.5){
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float off = ph * separation;
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if(x < 0.5 - off) col = getFromColor(vec2(x + off, uv.y)).rgb;
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else if(x >= 0.5 + off) col = getFromColor(vec2(x - off, uv.y)).rgb;
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} else {
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float off = (1.0 - pb) * separation;
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if(x < 0.5 - off) col = getToColor(vec2(x + off, uv.y)).rgb;
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else if(x >= 0.5 + off) col = getToColor(vec2(x - off, uv.y)).rgb;
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}
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float fl = 1.0 + flicker * (bt_hash(vec2(floor(uv.y * 90.0), floor(progress * 120.0))) - 0.5);
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float arc = exp(-abs(x - 0.5) * arcTight) * exp(-pow((progress - 0.5) * 8.5, 2.0)) * fl;
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col += vec3(0.72, 0.88, 1.0) * arc * arcGain;
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col += vec3(1.0) * arc * arc * 0.6;
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return vec4(col, 1.0);
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}
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