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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.
35 lines
1.4 KiB
GLSL
35 lines
1.4 KiB
GLSL
// Spectrum Sweep
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// blurb: An analyzer band crosses the frame, drawing the incoming image as bars before it resolves.
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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 bandWidth; // = 0.22 [0.05..0.6]
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uniform float barCount; // = 64.0 [8.0..200.0]
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uniform float glow; // = 1.2 [0.0..3.0]
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uniform float floorLift; // = 0.12 [0.0..0.5]
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vec4 transition(vec2 uv){
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float front = progress * (1.0 + bandWidth) - bandWidth;
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vec3 a = getFromColor(uv).rgb;
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vec3 b = getToColor(uv).rgb;
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if(uv.x < front) return vec4(b, 1.0);
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if(uv.x > front + bandWidth) return vec4(a, 1.0);
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float k = (uv.x - front) / bandWidth; // 0 at trailing edge, 1 at leading
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float bx = (floor(uv.x * barCount) + 0.5) / barCount;
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vec3 s = b;
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float lum = dot(getToColor(vec2(bx, uv.y)).rgb, vec3(0.299, 0.587, 0.114));
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float h = clamp(lum + floorLift, 0.0, 1.0);
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float bar = step(uv.y, h) * (0.35 + 0.65 * step(h - 0.02, uv.y));
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float gap = smoothstep(0.0, 0.06, fract(uv.x * barCount)) * (1.0 - smoothstep(0.94, 1.0, fract(uv.x * barCount)));
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vec3 analyzer = vec3(0.25, 1.0, 0.72) * bar * gap;
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vec3 col = mix(s, analyzer, smoothstep(0.15, 0.85, k));
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col = mix(col, a, smoothstep(0.75, 1.0, k));
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col += vec3(0.4, 1.0, 0.8) * exp(-abs(k - 1.0) * 22.0) * glow;
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return vec4(col, 1.0);
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}
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