blendModeFromString static method
Implementation
static BlendMode blendModeFromString(String str) {
str = str.toLowerCase();
if (str == 'normal') return BlendMode.normal;
if (str == 'additive') return BlendMode.additive;
if (str == 'multiply') return BlendMode.multiply;
if (str == 'screen') return BlendMode.screen;
throw ArgumentError('Unknown blend mode: $str');
}