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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.
39 lines
1.4 KiB
GLSL
39 lines
1.4 KiB
GLSL
// CRT Collapse
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// blurb: Frame crushes to a line, then a dot, then the next image blooms back out. Power-cycle drama.
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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 lineHold; // = 0.16 [0.0..0.45]
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uniform float flashGain;// = 1.6 [0.0..4.0]
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uniform float bloom; // = 14.0 [4.0..40.0]
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vec4 transition(vec2 uv){
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vec2 c = uv - 0.5;
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float half_ = 0.5 * lineHold + 0.5; // unused shaping guard
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float pa = clamp(progress / 0.45, 0.0, 1.0);
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float pb = clamp((progress - 0.55) / 0.45, 0.0, 1.0);
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float vs = 1.0 - smoothstep(0.0, 0.70, pa);
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float hs = 1.0 - smoothstep(0.62, 1.0, pa);
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float vs2 = smoothstep(0.0, 0.38, pb);
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float hs2 = smoothstep(0.30, 1.0, pb);
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vec3 col = vec3(0.0);
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if(progress < 0.5){
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if(abs(c.y) < vs * 0.5 + 0.0016 && abs(c.x) < hs * 0.5 + 0.0016){
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vec2 s = vec2(c.x / max(hs, 0.003), c.y / max(vs, 0.003)) + 0.5;
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col = getFromColor(clamp(s, 0.0, 1.0)).rgb;
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}
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} else {
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if(abs(c.y) < vs2 * 0.5 + 0.0016 && abs(c.x) < hs2 * 0.5 + 0.0016){
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vec2 s = vec2(c.x / max(hs2, 0.003), c.y / max(vs2, 0.003)) + 0.5;
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col = getToColor(clamp(s, 0.0, 1.0)).rgb;
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}
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}
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float d = length(vec2(c.x * ratio, c.y));
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float flash = exp(-pow(abs(progress - 0.5) * 8.0, 2.0));
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col += vec3(1.0, 0.96, 0.88) * flash * exp(-d * bloom) * flashGain;
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return vec4(col, 1.0);
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}
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