Method getVariablePrecisionString

src/backend/gl/kernel.js:967–994

(textureSize = this.texSize, tactic = this.tactic, isInt = false)

    }
  }
  getVariablePrecisionString(textureSize = this.texSize, tactic = this.tactic, isInt = false) {
    if (!tactic) {
      if (!this.constructor.features.isSpeedTacticSupported) return 'highp';
      const low = this.constructor.features[isInt ? 'lowIntPrecision' : 'lowFloatPrecision'];
      const medium = this.constructor.features[isInt ? 'mediumIntPrecision' : 'mediumFloatPrecision'];
      const high = this.constructor.features[isInt ? 'highIntPrecision' : 'highFloatPrecision'];
      const requiredSize = Math.log2(textureSize[0] * textureSize[1]);
      if (requiredSize <= low.rangeMax) {
        return 'lowp';
      } else if (requiredSize <= medium.rangeMax) {
        return 'mediump';
      } else if (requiredSize <= high.rangeMax) {
        return 'highp';
      } else {
        throw new Error(`The required size exceeds that of the ability of your system`);
      }
    }
    switch (tactic) {
      case 'speed':
        return 'lowp';
      case 'balanced':
        return 'mediump';
      case 'precision':
        return 'highp';
      default:
        throw new Error(`Unknown tactic "${tactic}" use "speed", "balanced", "precision", or empty for auto`);
    }
  }

  /**
   *