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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
1.2 KiB
GLSL
36 lines
1.2 KiB
GLSL
// Pixel Sort
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// blurb: Columns tear and quantize like glitch art, then resolve on a staggered per-column threshold.
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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 columns; // = 200.0 [20.0..600.0]
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uniform float strength; // = 0.45 [0.0..1.0]
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uniform float split; // = 0.012 [0.0..0.06]
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uniform float density; // = 0.35 [0.0..0.9]
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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 env = sin(3.14159265 * progress);
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float col = floor(uv.x * columns);
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float seed = bt_hash(vec2(col, 3.0));
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float active = step(density, seed);
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float amt = env * strength * (seed * 2.0 - 1.0) * active;
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vec3 a = getFromColor(vec2(uv.x, fract(uv.y + amt))).rgb;
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float s = split * env * active;
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vec2 ub = vec2(uv.x, fract(uv.y - amt));
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vec3 b;
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b.r = getToColor(vec2(fract(ub.x + s), ub.y)).r;
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b.g = getToColor(ub).g;
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b.b = getToColor(vec2(fract(ub.x - s), ub.y)).b;
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float q = mix(255.0, 6.0, env);
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a = floor(a * q) / q;
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b = floor(b * q) / q;
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float t = smoothstep(seed * 0.5, seed * 0.5 + 0.5, progress);
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return vec4(mix(a, b, t), 1.0);
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}
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