assets/snippets/AlphaTable.java

   1 // -*- Mode: Java; indent-tabs-mode: t; tab-width: 4 -*-
   2 // ---------------------------------------------------------------------------
   3 // Multi-Phasic Applications: SquirrelJME
   4 //     Copyright (C) Stephanie Gawroriski <xer@multiphasicapps.net>
   5 // ---------------------------------------------------------------------------
   6 // SquirrelJME is under the Mozilla Public License Version 2.0.
   7 // See license.mkd for licensing and copyright information.
   8 // ---------------------------------------------------------------------------
   9
  10 /**
  11  * Generates 4-bit alpha table.
  12  *
  13  * @since 2024/07/13
  14  */
  15 public class AlphaTable
  16 {
  17         /**
  18          * Main entry point.
  19          *
  20          * @param __args Ignored.
  21          * @since 2024/07/13
  22          */
  23         public static void main(String... __args)
  24         {
  25                 for (int ah = 0x00; ah < 0x100; ah += 0x10)
  26                 {
  27                         // Full value for A
  28                         int dX = ah | (ah >>> 4);
  29
  30                         for (int bh = 0x00; bh < 0x100; bh += 0x10)
  31                         {
  32                                 // Full value for B
  33                                 int sX = bh | (bh >>> 4);
  34
  35                                 // Convert alpha to float
  36                                 double dD = (dX / 255.0);
  37                                 double sD = (sX / 255.0);
  38
  39                                 double mD = sD + dD - (sD * dD);
  40
  41                                 System.out.printf("");
  42
  43                                 int iD = Math.max(0, Math.min(255,
  44                                         (int)Math.round(mD * 255.0)));
  45
  46                                 System.out.printf("%02");
  47
  48                                 /*int da = ca = sa + da - sjme_fixed_mul(sa, da);*/
  49                         }
  50                 }
  51         }
  52 }