src/base/bitmap.cc

   1 /*
   2  * Copyright (c) 2010 ARM Limited
   3  * All rights reserved
   4  *
   5  * The license below extends only to copyright in the software and shall
   6  * not be construed as granting a license to any other intellectual
   7  * property including but not limited to intellectual property relating
   8  * to a hardware implementation of the functionality of the software
   9  * licensed hereunder.  You may use the software subject to the license
  10  * terms below provided that you ensure that this notice is replicated
  11  * unmodified and in its entirety in all distributions of the software,
  12  * modified or unmodified, in source code or in binary form.
  13  *
  14  * Redistribution and use in source and binary forms, with or without
  15  * modification, are permitted provided that the following conditions are
  16  * met: redistributions of source code must retain the above copyright
  17  * notice, this list of conditions and the following disclaimer;
  18  * redistributions in binary form must reproduce the above copyright
  19  * notice, this list of conditions and the following disclaimer in the
  20  * documentation and/or other materials provided with the distribution;
  21  * neither the name of the copyright holders nor the names of its
  22  * contributors may be used to endorse or promote products derived from
  23  * this software without specific prior written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  26  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  27  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  28  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  29  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  30  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  31  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  32  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  33  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  34  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  35  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  *
  37  * Authors: William Wang
  38  *          Ali Saidi
  39  */
  40
  41 #include <cassert>
  42
  43 #include "base/bitmap.hh"
  44 #include "base/misc.hh"
  45
  46 // bitmap class ctor
  47 Bitmap::Bitmap(VideoConvert::Mode _mode, uint16_t w, uint16_t h, uint8_t *d)
  48     : mode(_mode), height(h), width(w), data(d),
  49     vc(mode, VideoConvert::rgb8888, width, height)
  50 {
  51 }
  52
  53 void
  54 Bitmap::write(std::ostream *bmp)
  55 {
  56     assert(data);
  57
  58     // For further information see: http://en.wikipedia.org/wiki/BMP_file_format
  59     Magic  magic = {{'B','M'}};
  60     Header header = {sizeof(VideoConvert::Rgb8888) * width * height , 0, 0, 54};
  61     Info   info = {sizeof(Info), width, height, 1,
  62                    sizeof(VideoConvert::Rgb8888) * 8, 0,
  63                    sizeof(VideoConvert::Rgb8888) * width * height, 1, 1, 0, 0};
  64
  65     bmp->write(reinterpret_cast<char*>(&magic),  sizeof(magic));
  66     bmp->write(reinterpret_cast<char*>(&header), sizeof(header));
  67     bmp->write(reinterpret_cast<char*>(&info),   sizeof(info));
  68
  69     uint8_t *tmp = vc.convert(data);
  70     uint32_t *tmp32 = (uint32_t*)tmp;
  71
  72     // BMP start store data left to right starting with the bottom row
  73     // so we need to do some creative flipping
  74     for (int i = height - 1; i >= 0; i--)
  75         for (int j = 0; j < width; j++)
  76             bmp->write((char*)&tmp32[i * width + j], sizeof(uint32_t));
  77
  78     bmp->flush();
  79
  80     delete [] tmp;
  81 }
  82