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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.
48 lines
1.9 KiB
GLSL
48 lines
1.9 KiB
GLSL
// Reel Change
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// blurb: Cue mark burns in the corner, the splice jumps the frame, dust settles on the new reel.
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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 cueSize; // = 0.045 [0.0..0.12]
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uniform float jumpAmt; // = 0.16 [0.0..0.5]
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uniform float dust; // = 0.6 [0.0..1.0]
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uniform float scratch; // = 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 e = progress;
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float splice = clamp((e - 0.46) / 0.16, 0.0, 1.0);
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float active = step(0.46, e) * step(e, 0.62);
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// stepped misregistration through the splice
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float k = floor(splice * 4.0);
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float off = (bt_hash(vec2(k, 2.0)) - 0.5) * jumpAmt * (1.0 - splice) * active;
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vec2 su = vec2(uv.x, fract(uv.y + off));
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vec3 a = getFromColor(su).rgb;
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vec3 b = getToColor(su).rgb;
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vec3 col = mix(a, b, step(0.54, e));
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// black frame bar riding through during the splice
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float barY = fract(uv.y + off * 3.0 + k * 0.37);
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float bar = (1.0 - smoothstep(0.0, 0.045, abs(barY - 0.5))) * active;
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col = mix(col, vec3(0.02), bar);
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// cue mark, upper right, four-frame flicker
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vec2 cp = (uv - vec2(0.865, 0.855)) * vec2(ratio, 1.0);
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float ring = 1.0 - smoothstep(cueSize * 0.72, cueSize, length(cp));
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float cueWin = step(0.20, e) * step(e, 0.47);
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float flick = 0.55 + 0.45 * step(0.5, fract(e * 26.0));
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col += vec3(1.0, 0.94, 0.80) * ring * cueWin * flick * 0.85;
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// dust and scratches, decaying after the change
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float decay = exp(-max(e - 0.54, 0.0) * 9.0) * step(0.46, e);
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float sp = bt_hash(uv * vec2(300.0, 170.0) + floor(e * 40.0));
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col += vec3(0.9) * step(0.9975, sp) * dust * decay;
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float sc = bt_hash(vec2(floor(uv.x * 260.0), floor(e * 20.0)));
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col += vec3(0.85, 0.82, 0.74) * step(0.995, sc) * scratch * decay * 0.7;
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return vec4(col, 1.0);
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}
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