mirror of
https://github.com/screentinker/screentinker.git
synced 2026-08-14 06:16:20 -06:00
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.
34 lines
1.3 KiB
GLSL
34 lines
1.3 KiB
GLSL
// Quantum Dither
|
|
// blurb: Pixels stay undecided, shimmering between both frames, then collapse on an ordered threshold.
|
|
// Author: Dan (ByteTinker)
|
|
// License: MIT
|
|
// GL Transitions v1 — GLSL ES 1.0, runs unmodified in WebGL1 and Android GLES2.
|
|
uniform float grain; // = 180.0 [20.0..600.0]
|
|
uniform float coherence; // = 0.6 [0.0..1.0]
|
|
uniform float shimmer; // = 0.5 [0.0..1.0]
|
|
uniform float edgeSoft; // = 0.10 [0.01..0.4]
|
|
|
|
float bt_hash(vec2 p){ return fract(sin(dot(p, vec2(127.1, 311.7))) * 43758.5453123); }
|
|
float bt_bayer2(vec2 a){ a = floor(a); return fract(a.x * 0.5 + a.y * a.y * 0.75); }
|
|
float bt_bayer4(vec2 a){ return (bt_bayer2(a * 0.5) * 0.25 + bt_bayer2(a)) / 0.9375; }
|
|
|
|
vec4 transition(vec2 uv){
|
|
vec2 g = floor(uv * vec2(grain * ratio, grain));
|
|
float n = bt_hash(g);
|
|
float bo = bt_bayer4(g);
|
|
float thr = mix(n, bo, coherence);
|
|
|
|
float w = edgeSoft;
|
|
float front = abs(progress - thr);
|
|
float undecided = exp(-front / max(w, 0.01) * 1.4);
|
|
thr += (bt_hash(g + floor(progress * 45.0) * 17.0) - 0.5) * shimmer * undecided * 0.5;
|
|
|
|
float t = smoothstep(thr - w, thr + w, progress * (1.0 + 2.0 * w) - w);
|
|
|
|
vec3 a = getFromColor(uv).rgb;
|
|
vec3 b = getToColor(uv).rgb;
|
|
vec3 col = mix(a, b, t);
|
|
col += vec3(0.18, 0.55, 0.62) * undecided * shimmer * 0.5;
|
|
return vec4(col, 1.0);
|
|
}
|