Variable GLSL_SANITIZE_FUNCTIONSConst
GLSL_SANITIZE_FUNCTIONS: "\nbool isInvalidFloat(float v) {\n return isnan(v) || isinf(v);\n}\n\nfloat sanitizePositive(float v, float fallback) {\n return (isInvalidFloat(v) || v <= 0.0) ? fallback : v;\n}\n\nfloat sanitizeNonNegative(float v, float fallback) {\n return (isInvalidFloat(v) || v < 0.0) ? fallback : v;\n}\n\n// Per-element opacity sanitizer: NaN/Inf route to the 1.0 opaque\n// identity (corruption stays LOUD), finite values clamp to [0, 1]\n// (alpha is opacity, never HDR — Python pins the range at write; this\n// guards hand-crafted zarr). The clamp keeps the zero boundary\n// CONTINUOUS (a -1e-4 epsilon vanishes like +0.0 renders, instead of\n// jumping to full opacity) and keeps the value mediump-varying-safe.\nfloat sanitizeAlpha(float v) {\n return isInvalidFloat(v) ? 1.0 : clamp(v, 0.0, 1.0);\n}\n" = ...