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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.
37 lines
1.3 KiB
GLSL
37 lines
1.3 KiB
GLSL
// Signal Lock
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// blurb: Static, rolling sync bars, then the picture snaps in like a tuner acquiring.
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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 noiseAmount; // = 0.85 [0.0..1.0]
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uniform float rollSpeed; // = 2.4 [0.0..8.0]
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uniform float barCount; // = 3.0 [0.0..8.0]
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uniform float tearAmount; // = 0.12 [0.0..0.5]
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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); // 0 at both ends
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float settle = 1.0 - smoothstep(0.55, 1.0, progress);
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vec2 uvr = uv;
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uvr.y = fract(uv.y + settle * progress * rollSpeed);
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float line = floor(uv.y * 240.0);
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float tear = (bt_hash(vec2(line, floor(progress * 30.0))) - 0.5) * tearAmount * env;
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uvr.x = fract(uv.x + tear);
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vec4 a = getFromColor(uv);
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vec4 b = getToColor(uvr);
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float sig = smoothstep(0.42, 0.58, progress);
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vec4 img = mix(a, b, sig);
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float bp = fract(uv.y + progress * barCount);
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float bar = smoothstep(0.0, 0.05, bp) * (1.0 - smoothstep(0.05, 0.11, bp));
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img.rgb += bar * 0.40 * env;
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float st = bt_hash(uv * vec2(640.0, 360.0) + floor(progress * 60.0));
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img.rgb = mix(img.rgb, vec3(st), pow(env, 0.55) * noiseAmount * 0.7);
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return vec4(img.rgb, 1.0);
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}
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