text: //-----------------------------------------------------------------------------
  // Copyright (c) 2012 GarageGames, LLC
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to
  // deal in the Software without restriction, including without limitation the
  // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
  // sell copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in
  // all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  // IN THE SOFTWARE.
  //-----------------------------------------------------------------------------
  
  #include "math/mMath.h"
  #include "gfx/bitmap/bitmapUtils.h"
  
  //--------------------------------------------------------------------------
  void bitmapExtrude5551_asm(const void *srcMip, void *mip, U32 height, U32 width)
  {
     const U16 *src = (const U16 *) srcMip;
     U16 *dst = (U16 *) mip;
     U32 stride = width << 1;
  
     for(U32 y = 0; y < height; y++)
     {
        for(U32 x = 0; x < width; x++)
        {
           U32 a = src[0];
           U32 b = src[1];
           U32 c = src[stride];
           U32 d = src[stride+1];
           dst[x] = ((((a >> 11) + (b >> 11) + (c >> 11) + (d >> 11)) >> 2) << 11) |
                    (((  ((a >> 6) & 0x1f) + ((b >> 6) & 0x1f) + ((c >> 6) & 0x1f) + ((d >> 6) & 0x1F) ) >> 2) << 6) |
                    ((( ((a >> 1) & 0x1F) + ((b >> 1) & 0x1F) + ((c >> 1) & 0x1f) + ((d >> 1) & 0x1f)) >> 2) << 1);
           src += 2;
        }
        src += stride;
        dst += width;
     }
  }
  
  //--------------------------------------------------------------------------
  void PlatformBlitInit()
  {
     bitmapExtrude5551 = bitmapExtrude5551_asm;
     bitmapExtrudeRGB  = bitmapExtrudeRGB_c;
  
     if (Platform::SystemInfo.processor.properties & CPU_PROP_MMX)
     {
        // JMQ: haven't bothered porting mmx bitmap funcs because they don't
        // seem to offer a big performance boost right now.
     }
  }
  
  