rom/graphics/loadrgb32.c

   1 /*
   2     Copyright © 1995-2007, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc:
   6     Lang: english
   7 */
   8 #include <aros/debug.h>
   9 #include "graphics_intern.h"
  10 #include <proto/graphics.h>
  11
  12 #if DEBUG
  13 #undef THIS_FILE
  14 static const char THIS_FILE[] = __FILE__;
  15 #endif
  16
  17 /*****************************************************************************
  18
  19     NAME */
  20
  21         AROS_LH2(void, LoadRGB32,
  22
  23 /*  SYNOPSIS */
  24         AROS_LHA(struct ViewPort *, vp, A0),
  25         AROS_LHA(const ULONG     *, table, A1),
  26
  27 /*  LOCATION */
  28         struct GfxBase *, GfxBase, 147, Graphics)
  29
  30 /*  FUNCTION
  31         Load RGB color values from table.
  32
  33     INPUTS
  34         vp    - ViewPort
  35         table - pointer to table of records
  36                 1 Word with the number of colors to load
  37                 1 Word with the first color to be loaded.
  38                 3 Longwords representing a left justified 32 bit RGB triplet.
  39                 The list is terminated by a count value of 0.
  40     RESULT
  41
  42     NOTES
  43
  44     EXAMPLE
  45         ULONG table[] = { 1l << 16 + 0 , 0xffffffff , 0 , 0 , 0}
  46         ULONG table[] = { 256l << 16 + 0 , r1 , g1 , b1 , r2 , g2 , b2 , ..... 0}
  47
  48     BUGS
  49
  50     SEE ALSO
  51
  52     INTERNALS
  53
  54     HISTORY
  55         27-11-96    digulla automatically created from
  56                             graphics_lib.fd and clib/graphics_protos.h
  57
  58 *****************************************************************************/
  59 {
  60     AROS_LIBFUNC_INIT
  61
  62     ASSERT_VALID_PTR(vp);
  63     ASSERT_VALID_PTR_OR_NULL(table);
  64
  65     /* it is legal to pass a NULL table */
  66
  67     if (table)
  68     {
  69         ULONG count;
  70
  71         /* table is terminated by a count value of 0 */
  72
  73         while ((count = (*table) >> 16))
  74         {
  75             ULONG first, t;
  76
  77             first = (*table) & 0xFFFF;
  78
  79             table ++;
  80
  81             for (t = 0; t < count; t++)
  82             {
  83                 SetRGB32 (vp,
  84                           t + first,
  85                           table[0],
  86                           table[1],
  87                           table[2]);
  88
  89                 table += 3;
  90             }
  91
  92         } /* while (*table) */
  93     }
  94
  95     AROS_LIBFUNC_EXIT
  96
  97 } /* LoadRGB32 */