Method colorCalcARGB

core/src/processing/core/PGraphics.java:7750–7766

Unpacks AARRGGBB color for direct use with colorCalc. Handled here with its own function since this is independent of the color mode. Strangely the old version of this code ignored the alpha value. not sure if that was a bug or what. Note, no need for a bounds check for 'argb' since it's

(int argb, float alpha)

   * Bounds now checked on alpha, however (rev 0225).
   */
  protected void colorCalcARGB(int argb, float alpha) {
    if (alpha == colorModeA) {
      calcAi = (argb >> 24) & 0xff;
      calcColor = argb;
    } else {
      calcAi = (int) (((argb >> 24) & 0xff) * PApplet.constrain((alpha / colorModeA), 0, 1));
      calcColor = (calcAi << 24) | (argb & 0xFFFFFF);
    }
    calcRi = (argb >> 16) & 0xff;
    calcGi = (argb >> 8) & 0xff;
    calcBi = argb & 0xff;
    calcA = calcAi / 255.0f;
    calcR = calcRi / 255.0f;
    calcG = calcGi / 255.0f;
    calcB = calcBi / 255.0f;
    calcAlpha = (calcAi != 255);
  }