opennurbs_bitmap.cpp

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/* $NoKeywords: $ */
/*
 //
 // Copyright (c) 1993-2012 Robert McNeel & Associates. All rights reserved.
 // OpenNURBS, Rhinoceros, and Rhino3D are registered trademarks of Robert
 // McNeel & Associates.
 //
 // THIS SOFTWARE IS PROVIDED "AS IS" WITHOUT EXPRESS OR IMPLIED WARRANTY.
 // ALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE AND OF
 // MERCHANTABILITY ARE HEREBY DISCLAIMED.
 //
 // For complete openNURBS copyright information see <http://www.opennurbs.org>.
 //
 */

#include "pcl/surface/3rdparty/opennurbs/opennurbs.h"

ON_VIRTUAL_OBJECT_IMPLEMENT( ON_Bitmap, ON_Object, "390465E9-3721-11d4-800B-0010830122F0")
;

ON_OBJECT_IMPLEMENT( ON_WindowsBitmap, ON_Bitmap, "390465EB-3721-11d4-800B-0010830122F0")
;

ON_OBJECT_IMPLEMENT( ON_EmbeddedBitmap, ON_Bitmap, "772E6FC1-B17B-4fc4-8F54-5FDA511D76D2")
;

ON_OBJECT_IMPLEMENT( ON_WindowsBitmapEx, ON_WindowsBitmap, "203AFC17-BCC9-44fb-A07B-7F5C31BD5ED9")
;

void
ON_Bitmap::EmergencyDestroy ()
{
  memset (&m_bitmap_id, 0, sizeof(m_bitmap_id));
  m_bitmap_index = -1;
  m_bitmap_name.EmergencyDestroy ();
  m_bitmap_filename.EmergencyDestroy ();
}

void
ON_Bitmap::Destroy ()
{
  m_bitmap_name.Destroy ();
  m_bitmap_filename.Destroy ();
  ON_Bitmap::EmergencyDestroy ();
}

void
ON_Bitmap::Defaults ()
{
  memset (&m_bitmap_id, 0, sizeof(m_bitmap_id));
  m_bitmap_index = -1;
  m_bitmap_name.Destroy ();
  m_bitmap_filename.Destroy ();
}

ON_Bitmap::ON_Bitmap ()
{
  memset (&m_bitmap_id, 0, sizeof(m_bitmap_id));
  m_bitmap_index = -1;
}

ON_Bitmap::~ON_Bitmap ()
{
}

void
ON_Bitmap::Dump (ON_TextLog& dump) const
{
  dump.Print ("width = %d pixels\n", Width ());
  dump.Print ("height = %d pixels\n", Height ());
  dump.Print ("bits per pixel = %d\n", BitsPerPixel ());
  dump.Print ("size of image = %d bytes\n", SizeofImage ());
}

static
int
ON_WindowsBitmapHelper_PaletteColorCount (int bmiHeader_biClrUsed, int bmiHeader_biBitCount)
{
  int color_count = 0;

  if (bmiHeader_biClrUsed)
  {
    color_count = bmiHeader_biClrUsed;
  }
  else
  {
    switch (bmiHeader_biBitCount)
    {
      case 1:
        color_count = 2;
        break;
      case 4:
        color_count = 16;
        break;
      case 8:
        color_count = 256;
        break;
      default:
        color_count = 0;
        break;
    }
  }
  return color_count;
}

static size_t
ON_WindowsBitmapHelper_SizeofPalette (int bmiHeader_biClrUsed, int bmiHeader_biBitCount)
{
#if defined(ON_OS_WINDOWS_GDI)
  return ( ON_WindowsBitmapHelper_PaletteColorCount(bmiHeader_biClrUsed,bmiHeader_biBitCount) * sizeof(RGBQUAD) );
#else
  return (ON_WindowsBitmapHelper_PaletteColorCount (bmiHeader_biClrUsed, bmiHeader_biBitCount)
      * sizeof(ON_WindowsRGBQUAD));
#endif
}

ON_WindowsBitmap::ON_WindowsBitmap () :
  m_bmi (0), m_bits (0), m_bFreeBMI (0)
{
}

ON_WindowsBitmap::ON_WindowsBitmap (const ON_WindowsBitmap& src) :
  m_bmi (0), m_bits (0), m_bFreeBMI (0)
{
  *this = src;
}

void
ON_WindowsBitmap::EmergencyDestroy ()
{
  m_bmi = 0;
  m_bits = 0;
  m_bFreeBMI = 0;
  ON_Bitmap::EmergencyDestroy ();
}

void
ON_WindowsBitmap::Destroy ()
{
  if (m_bmi)
  {
    if (1 == m_bFreeBMI || 3 == m_bFreeBMI)
      onfree (m_bmi);
    m_bmi = 0;
  }
  if (m_bits)
  {
    if (2 == m_bFreeBMI || 3 == m_bFreeBMI)
      onfree (m_bits);
    m_bits = 0;
  }
  m_bFreeBMI = 0;
  ON_Bitmap::Destroy ();
}

ON_BOOL32
ON_WindowsBitmap::IsValid (ON_TextLog* text_log) const
{
  bool rc = (m_bmi != NULL && m_bits != NULL && Width () > 0 && Height () > 0) ? true : false;

  if (!rc && 0 != text_log)
  {
    // TODO:  add a detailed diagnostic message
    text_log->Print ("ON_WindowsBitmap is not valid\n");
  }
  return rc;
}

#if defined(ON_OS_WINDOWS_GDI)

static BITMAPINFO*
ON_WindowsBitmapHelper_AllocBMI(size_t sizeof_palette, size_t sizeof_image)
{
  // In theory,
  //    sz = sizeof(BITMAPINFOHEADER) + sizeof_palette + sizeof_image;
  // should work, but BITMAPINFO is only 4 bytes bigger than BITMAPINFOHEADER
  // and the allocation below will certainly work.
  size_t sz = sizeof(BITMAPINFO) + sizeof_palette + sizeof_image;
  BITMAPINFO* bmi = (BITMAPINFO*)onmalloc(sz);
  if ( bmi )
  {
    memset(bmi,0,sizeof(*bmi));
    bmi->bmiHeader.biSize = sizeof(bmi->bmiHeader);
  }
  return bmi;
}

#else

static ON_WindowsBITMAPINFO*
ON_WindowsBitmapHelper_AllocBMI (size_t sizeof_palette, size_t sizeof_image)
{
  size_t sz = sizeof(ON_WindowsBITMAPINFO) + sizeof_palette + sizeof_image;
  ON_WindowsBITMAPINFO* bmi = (ON_WindowsBITMAPINFO*)onmalloc (sz);
  if (bmi)
  {
    memset (bmi, 0, sizeof(*bmi));
    bmi->bmiHeader.biSize = sizeof(bmi->bmiHeader);
  }
  return bmi;
}

#endif

bool
ON_WindowsBitmap::Create (int width, int height, int bits_per_pixel // 1, 2, 4, 8, 16, 24, or 32
)
{
  Destroy ();

  if (width < 1 || height < 1)
  {
    return false;
  }
  if (bits_per_pixel != 1 && bits_per_pixel != 2 && bits_per_pixel != 4 && bits_per_pixel != 8 && bits_per_pixel != 16
      && bits_per_pixel != 24 && bits_per_pixel != 32)
  {
    return false;
  }

#if defined(ON_OS_WINDOWS_GDI)
  BITMAPINFOHEADER bh;
  const DWORD sizeof_RGBQUAD = sizeof(RGBQUAD);
#else
  ON_WindowsBITMAPINFOHEADER bh;
  const unsigned int sizeof_RGBQUAD = sizeof(ON_WindowsRGBQUAD);
#endif
  memset (&bh, 0, sizeof(bh));
  bh.biSize = sizeof(bh);
  bh.biWidth = width;
  bh.biHeight = height;
  bh.biPlanes = 1;
  bh.biBitCount = (unsigned short)bits_per_pixel; // cast is safe
  bh.biCompression = 0; // BI_RGB
  const int sizeof_scan = (((bits_per_pixel * width) + 31) / 32) * 4;
  bh.biSizeImage = height * sizeof_scan;
  bh.biXPelsPerMeter = 0;
  bh.biYPelsPerMeter = 0;
  bh.biClrUsed = 0;
  bh.biClrImportant = 0;

  int palette_color_count = 0;
  switch (bits_per_pixel)
  {
    case 1:
      palette_color_count = 2;
      break;
    case 4:
      palette_color_count = 16;
      break;
    case 8:
      palette_color_count = 256;
      break;
  }
  const int sizeof_palette = palette_color_count * sizeof_RGBQUAD;

  m_bmi = ON_WindowsBitmapHelper_AllocBMI (sizeof_palette, bh.biSizeImage);

  bool rc = false;

  if (m_bmi /*&& palette_color_count > 0*/)
  {
    m_bmi->bmiHeader = bh;
    m_bits = (unsigned char*)&m_bmi->bmiColors[palette_color_count];

    // default palette is gray scale
    if (palette_color_count > 0)
    {
      const int rgb_delta = 256 / palette_color_count;
      int i, rgb;
      for (i = 0, rgb = 0; i < palette_color_count; i++, rgb += rgb_delta)
      {
        if (rgb >= 256)
          rgb = 255;
        m_bmi->bmiColors[i].rgbBlue = (unsigned char)rgb;
        m_bmi->bmiColors[i].rgbGreen = (unsigned char)rgb;
        m_bmi->bmiColors[i].rgbRed = (unsigned char)rgb;
        m_bmi->bmiColors[i].rgbReserved = 0;
      }
    }
    rc = true;
  }

  return rc;
}

ON_WindowsBitmap::~ON_WindowsBitmap ()
{
  Destroy ();
}

ON_WindowsBitmap&
ON_WindowsBitmap::operator= (const ON_WindowsBitmap& src)
{
  if (this != &src)
  {
    Destroy ();
    ON_Bitmap::operator= (src);
    if (src.m_bmi)
    {
      const int sizeof_palette = src.SizeofPalette ();
      const int sizeof_image = src.SizeofImage ();
      m_bmi = ON_WindowsBitmapHelper_AllocBMI (sizeof_palette, sizeof_image);
      if (m_bmi)
      {
        m_bFreeBMI = 1;
        m_bmi->bmiHeader = src.m_bmi->bmiHeader;
        if (sizeof_palette > 0)
        {
          memcpy (&m_bmi->bmiColors[0], &src.m_bmi->bmiColors[0], sizeof_palette);
        }
        if (sizeof_image > 0)
        {
          m_bits = (unsigned char*)&m_bmi->bmiColors[PaletteColorCount ()];
          if (src.m_bits)
            memcpy (m_bits, src.m_bits, sizeof_image);
          else
            memset (m_bits, 0, sizeof_image);
        }
        else
          m_bits = 0;
      }
    }
  }
  return *this;
}

int
ON_WindowsBitmap::Width () const
{
  return (m_bmi) ? m_bmi->bmiHeader.biWidth : 0;
}

int
ON_WindowsBitmap::Height () const
{
  return (m_bmi) ? m_bmi->bmiHeader.biHeight : 0;
}

int
ON_WindowsBitmap::PaletteColorCount () const
{
  return m_bmi ? ON_WindowsBitmapHelper_PaletteColorCount (m_bmi->bmiHeader.biClrUsed, m_bmi->bmiHeader.biBitCount) : 0;
}

int
ON_WindowsBitmap::SizeofPalette () const
{
  return m_bmi ? ((int)ON_WindowsBitmapHelper_SizeofPalette (m_bmi->bmiHeader.biClrUsed, m_bmi->bmiHeader.biBitCount))
      : 0;
}

int
ON_WindowsBitmap::SizeofScan () const
{
  int scan_width = 0;
  if (m_bmi)
  {
    int bitcount = m_bmi->bmiHeader.biBitCount;
    int width = Width ();
    scan_width = (((bitcount * width) + 31) / 32) * 4;
  }
  return scan_width;
}

int
ON_WindowsBitmap::BitsPerPixel () const
{
  return m_bmi ? m_bmi->bmiHeader.biBitCount : 0;
}

int
ON_WindowsBitmap::SizeofImage () const
{
  return m_bmi ? m_bmi->bmiHeader.biSizeImage : 0;
}

unsigned char*
ON_WindowsBitmap::Bits (int scan_index)
{
  const int sizeof_scan = SizeofScan ();
  unsigned char* bits = m_bmi ? (unsigned char*)&m_bmi->bmiColors[PaletteColorCount ()] : 0;
  if (bits && sizeof_scan && scan_index >= 0 && scan_index < Height ())
  {
    bits += (sizeof_scan * scan_index);
  }
  else
  {
    bits = 0;
  }
  return bits;
}

const unsigned char*
ON_WindowsBitmap::Bits (int scan_index) const
{
  const int sizeof_scan = SizeofScan ();
  const unsigned char* bits = m_bmi ? (const unsigned char*)&m_bmi->bmiColors[PaletteColorCount ()] : 0;
  if (bits && sizeof_scan && scan_index >= 0 && scan_index < Height ())
  {
    bits += (sizeof_scan * scan_index);
  }
  else
  {
    bits = 0;
  }
  return bits;
}

ON_Color
ON_WindowsBitmap::Pixel (int column_index, int row_index) const
{
  return Pixel (column_index, Bits (row_index));
}

ON_Color
ON_WindowsBitmap::Pixel (int column_index, const unsigned char* scanbits) const
{
  int r = 0, g = 0, b = 0, a = 0;

  unsigned int palindex;

  if (m_bmi && column_index >= 0 && column_index <= Width () && scanbits && !m_bmi->bmiHeader.biCompression)
  {
    switch (m_bmi->bmiHeader.biBitCount)
    {
      case 32:
        scanbits += (column_index * 4);
        b = *scanbits++;
        g = *scanbits++;
        r = *scanbits++;
        a = *scanbits;
        break;

      case 24:
        scanbits += (column_index * 3);
        b = *scanbits++;
        g = *scanbits++;
        r = *scanbits;
        break;

      case 8:
        // 256 color bitmap uses palette
        palindex = scanbits[column_index];
        b = m_bmi->bmiColors[palindex].rgbBlue;
        g = m_bmi->bmiColors[palindex].rgbGreen;
        r = m_bmi->bmiColors[palindex].rgbRed;
        a = m_bmi->bmiColors[palindex].rgbReserved;
        break;

      case 4:
      {
        // 16 color bitmap uses palette
        palindex = scanbits[column_index / 2];
        if (!(column_index % 2))
          palindex >>= 4;
        palindex &= 0x0F;
        b = m_bmi->bmiColors[palindex].rgbBlue;
        g = m_bmi->bmiColors[palindex].rgbGreen;
        r = m_bmi->bmiColors[palindex].rgbRed;
        a = m_bmi->bmiColors[palindex].rgbReserved;
      }
        break;

      case 1:
        // monochrome bitmap has 2 color palette
        palindex = (scanbits[column_index / 8] >> (7 - (column_index % 8))) & 0x01;
        b = m_bmi->bmiColors[palindex].rgbBlue;
        g = m_bmi->bmiColors[palindex].rgbGreen;
        r = m_bmi->bmiColors[palindex].rgbRed;
        a = m_bmi->bmiColors[palindex].rgbReserved;
        break;
    }
  }

  return ON_Color (r, g, b, a);
}

bool
ON_WindowsBitmap::WriteUncompressed (ON_BinaryArchive& file) const
{
#if defined(ON_OS_WINDOWS_GDI)
  BITMAPINFOHEADER bmiHeader;
#else
  ON_WindowsBITMAPINFOHEADER bmiHeader;
#endif

  if (m_bmi)
  {
    bmiHeader = m_bmi->bmiHeader;
    bmiHeader.biSize = sizeof(bmiHeader);
  }
  else
  {
    memset (&bmiHeader, 0, sizeof(bmiHeader));
  }
  int i;
  short s;
  i = bmiHeader.biSize;
  bool rc = file.WriteInt (i);
  i = bmiHeader.biWidth;
  if (rc)
    rc = file.WriteInt (i);
  i = bmiHeader.biHeight;
  if (rc)
    rc = file.WriteInt (i);
  s = bmiHeader.biPlanes;
  if (rc)
    rc = file.WriteShort (s);
  s = bmiHeader.biBitCount;
  if (rc)
    rc = file.WriteShort (s);
  i = bmiHeader.biCompression;
  if (rc)
    rc = file.WriteInt (i);
  i = bmiHeader.biSizeImage;
  if (rc)
    rc = file.WriteInt (i);
  i = bmiHeader.biXPelsPerMeter;
  if (rc)
    rc = file.WriteInt (i);
  i = bmiHeader.biYPelsPerMeter;
  if (rc)
    rc = file.WriteInt (i);
  i = bmiHeader.biClrUsed;
  if (rc)
    rc = file.WriteInt (i);
  i = bmiHeader.biClrImportant;
  if (rc)
    rc = file.WriteInt (i);

  if (rc)
  {
    const int color_count = PaletteColorCount ();
    for (i = 0; i < color_count && rc; i++)
    {
      if (rc)
        rc = file.WriteChar (m_bmi->bmiColors[i].rgbBlue);
      if (rc)
        rc = file.WriteChar (m_bmi->bmiColors[i].rgbGreen);
      if (rc)
        rc = file.WriteChar (m_bmi->bmiColors[i].rgbRed);
      if (rc)
        rc = file.WriteChar (m_bmi->bmiColors[i].rgbReserved);
    }
    const int sizeof_image = SizeofImage ();
    if (sizeof_image > 0 && rc)
    {
      if (rc)
        rc = file.WriteByte (sizeof_image, &m_bmi->bmiColors[color_count]);
    }
  }

  return rc;
}

bool
ON_WindowsBitmap::ReadUncompressed (ON_BinaryArchive& file)
{
#if defined(ON_OS_WINDOWS_GDI)
  BITMAPINFOHEADER bmiHeader;
#else
  ON_WindowsBITMAPINFOHEADER bmiHeader;
#endif
  memset (&bmiHeader, 0, sizeof(bmiHeader));

  Destroy ();

  int i;
  short s;
  bool rc;

  for (;;)
  {
    i = 0;
    s = 0;
    rc = file.ReadInt (&i);
    if (!rc)
      break;
    bmiHeader.biSize = i;
    rc = file.ReadInt (&i);
    if (!rc)
      break;
    bmiHeader.biWidth = i;
    rc = file.ReadInt (&i);
    if (!rc)
      break;
    bmiHeader.biHeight = i;
    rc = file.ReadShort (&s);
    if (!rc)
      break;
    bmiHeader.biPlanes = s;
    rc = file.ReadShort (&s);
    if (!rc)
      break;
    bmiHeader.biBitCount = s;
    rc = file.ReadInt (&i);
    if (!rc)
      break;
    bmiHeader.biCompression = i;
    rc = file.ReadInt (&i);
    if (!rc)
      break;
    bmiHeader.biSizeImage = i;
    rc = file.ReadInt (&i);
    if (!rc)
      break;
    bmiHeader.biXPelsPerMeter = i;
    rc = file.ReadInt (&i);
    if (!rc)
      break;
    bmiHeader.biYPelsPerMeter = i;
    rc = file.ReadInt (&i);
    if (!rc)
      break;
    bmiHeader.biClrUsed = i;
    rc = file.ReadInt (&i);
    if (!rc)
      break;
    bmiHeader.biClrImportant = i;
    break;
  }

  if (rc)
  {
    bmiHeader.biSize = sizeof(bmiHeader);
    const size_t sizeof_palette = ON_WindowsBitmapHelper_SizeofPalette (bmiHeader.biClrUsed, bmiHeader.biBitCount);
    const size_t sizeof_image = bmiHeader.biSizeImage;

    m_bmi = ON_WindowsBitmapHelper_AllocBMI (sizeof_palette, sizeof_image);

    if (!m_bmi)
    {
      rc = false;
    }
    else
    {
      m_bFreeBMI = 1;
      m_bmi->bmiHeader = bmiHeader;
      const int color_count = ON_WindowsBitmapHelper_PaletteColorCount (bmiHeader.biClrUsed, bmiHeader.biBitCount);
      int i;
      for (i = 0; i < color_count && rc; i++)
      {
        if (rc)
          rc = file.ReadChar (&m_bmi->bmiColors[i].rgbBlue);
        if (rc)
          rc = file.ReadChar (&m_bmi->bmiColors[i].rgbGreen);
        if (rc)
          rc = file.ReadChar (&m_bmi->bmiColors[i].rgbRed);
        if (rc)
          rc = file.ReadChar (&m_bmi->bmiColors[i].rgbReserved);
      }
      if (sizeof_image > 0 && rc)
      {
        m_bits = (unsigned char*)&m_bmi->bmiColors[color_count];
        if (rc)
          rc = file.ReadByte (sizeof_image, m_bits);
      }
    }
  }
  return rc;
}

ON_BOOL32
ON_WindowsBitmap::Write (ON_BinaryArchive& file) const
{
  return WriteCompressed (file);
}

ON_BOOL32
ON_WindowsBitmap::Read (ON_BinaryArchive& file)
{
  bool rc = false;
  if (file.Archive3dmVersion () == 1)
    rc = ReadUncompressed (file);
  else
    rc = ReadCompressed (file);
  return rc;
}

ON_WindowsBitmapEx::ON_WindowsBitmapEx ()
{
}

ON_WindowsBitmapEx::~ON_WindowsBitmapEx ()
{
}

ON_BOOL32
ON_WindowsBitmapEx::Write (ON_BinaryArchive& file) const
{
  ON_BOOL32 rc = file.Write3dmChunkVersion (1, 0);
  if (rc)
    rc = file.WriteString (m_bitmap_filename);
  if (rc)
    rc = ON_WindowsBitmap::WriteCompressed (file);
  return rc;
}

ON_BOOL32
ON_WindowsBitmapEx::Read (ON_BinaryArchive& file)
{
  int major_version = 0;
  int minor_version = 0;
  ON_BOOL32 rc = file.Read3dmChunkVersion (&major_version, &minor_version);
  if (rc && 1 == major_version)
  {
    // Calling ON_WindowsBitmap::ReadCompressed() destroys
    // m_bitmap_filename, so we have to read it into a local
    // string and make the assigment after calling 
    // ON_WindowsBitmap::ReadCompressed().
    ON_wString bitmap_filename;
    if (rc)
      rc = file.ReadString (bitmap_filename);
    if (!rc)
      bitmap_filename.Destroy ();

    if (rc)
      rc = ON_WindowsBitmap::ReadCompressed (file);

    m_bitmap_filename = bitmap_filename;
  }
  else
    rc = false;
  return rc;
}

bool
ON_WindowsBitmap::WriteCompressed (ON_BinaryArchive& file) const
{
  int color_count = 0;
  int sizeof_palette = 0;
  int sizeof_image = 0;
  bool bContiguousBitmap = IsContiguous ();
#if defined(ON_OS_WINDOWS_GDI)
  BITMAPINFOHEADER bmiHeader;
#else
  ON_WindowsBITMAPINFOHEADER bmiHeader;
#endif
  if (m_bmi)
  {
    bmiHeader = m_bmi->bmiHeader;
    color_count = PaletteColorCount ();
    sizeof_palette = color_count * sizeof(*m_bmi->bmiColors);
    sizeof_image = SizeofImage ();
    if (0 == sizeof_image)
      bContiguousBitmap = true;
  }
  else
  {
    bContiguousBitmap = true;
    color_count = 0;
    sizeof_palette = 0;
    sizeof_image = 0;
    memset (&bmiHeader, 0, sizeof(bmiHeader));
  }
  int i;
  short s;
  i = bmiHeader.biSize;
  bool rc = file.WriteInt (i);
  i = bmiHeader.biWidth;
  if (rc)
    rc = file.WriteInt (i);
  i = bmiHeader.biHeight;
  if (rc)
    rc = file.WriteInt (i);
  s = bmiHeader.biPlanes;
  if (rc)
    rc = file.WriteShort (s);
  s = bmiHeader.biBitCount;
  if (rc)
    rc = file.WriteShort (s);
  i = bmiHeader.biCompression;
  if (rc)
    rc = file.WriteInt (i);
  i = bmiHeader.biSizeImage;
  if (rc)
    rc = file.WriteInt (i);
  i = bmiHeader.biXPelsPerMeter;
  if (rc)
    rc = file.WriteInt (i);
  i = bmiHeader.biYPelsPerMeter;
  if (rc)
    rc = file.WriteInt (i);
  i = bmiHeader.biClrUsed;
  if (rc)
    rc = file.WriteInt (i);
  i = bmiHeader.biClrImportant;
  if (rc)
    rc = file.WriteInt (i);

  if (rc)
  {
    if (bContiguousBitmap)
    {
      const int sizeof_buffer = sizeof_palette + sizeof_image;
      // palette and bits are compressed in a single chunk
      rc = file.WriteCompressedBuffer (sizeof_buffer, (0 != m_bmi) ? m_bmi->bmiColors : 0);
    }
    else
    {
      // 28 July 2003
      //     Added support for writing non-contiguous bitmaps
      // palette 
      rc = file.WriteCompressedBuffer (sizeof_palette, m_bmi->bmiColors);
      if (rc)
      {
        // image bits
        rc = file.WriteCompressedBuffer (sizeof_image, m_bits);
      }
    }
  }

  return rc;
}

bool
ON_WindowsBitmap::ReadCompressed (ON_BinaryArchive& file)
{
  ON_BOOL32 bFailedCRC = false;
  Destroy ();
#if defined(ON_OS_WINDOWS_GDI)
  BITMAPINFOHEADER bmiHeader;
#else
  ON_WindowsBITMAPINFOHEADER bmiHeader;
#endif
  memset (&bmiHeader, 0, sizeof(bmiHeader));
  int i;
  short s;
  bool rc;

  for (;;)
  {
    i = 0;
    s = 0;
    rc = file.ReadInt (&i);
    if (!rc)
      break;
    bmiHeader.biSize = i;
    rc = file.ReadInt (&i);
    if (!rc)
      break;
    bmiHeader.biWidth = i;
    rc = file.ReadInt (&i);
    if (!rc)
      break;
    bmiHeader.biHeight = i;
    rc = file.ReadShort (&s);
    if (!rc)
      break;
    bmiHeader.biPlanes = s;
    rc = file.ReadShort (&s);
    if (!rc)
      break;
    bmiHeader.biBitCount = s;
    rc = file.ReadInt (&i);
    if (!rc)
      break;
    bmiHeader.biCompression = i;
    rc = file.ReadInt (&i);
    if (!rc)
      break;
    bmiHeader.biSizeImage = i;
    rc = file.ReadInt (&i);
    if (!rc)
      break;
    bmiHeader.biXPelsPerMeter = i;
    rc = file.ReadInt (&i);
    if (!rc)
      break;
    bmiHeader.biYPelsPerMeter = i;
    rc = file.ReadInt (&i);
    if (!rc)
      break;
    bmiHeader.biClrUsed = i;
    rc = file.ReadInt (&i);
    if (!rc)
      break;
    bmiHeader.biClrImportant = i;
    break;
  }

  if (rc)
  {
    bmiHeader.biSize = sizeof(bmiHeader);
    const size_t sizeof_palette = ON_WindowsBitmapHelper_SizeofPalette (bmiHeader.biClrUsed, bmiHeader.biBitCount);
    const size_t sizeof_image = bmiHeader.biSizeImage;
    m_bmi = ON_WindowsBitmapHelper_AllocBMI (sizeof_palette, sizeof_image);
    if (!m_bmi)
    {
      rc = false;
    }
    else
    {
      m_bFreeBMI = 1;
      m_bmi->bmiHeader = bmiHeader;
      m_bmi->bmiHeader.biSize = sizeof(m_bmi->bmiHeader);
      const int color_count = ON_WindowsBitmapHelper_PaletteColorCount (bmiHeader.biClrUsed, bmiHeader.biBitCount);
      if (sizeof_image > 0)
        m_bits = (unsigned char*)&m_bmi->bmiColors[color_count];
      size_t sizeof_buffer = 0;
      rc = file.ReadCompressedBufferSize (&sizeof_buffer);
      if (rc)
      {
        const size_t sizeof_colors = color_count * sizeof(*m_bmi->bmiColors);
        if (sizeof_buffer == sizeof_colors || sizeof_buffer == sizeof_colors + sizeof_image)
        {
          // palette and image bits are compressed into one or two chunks
          rc = file.ReadCompressedBuffer (sizeof_buffer, m_bmi->bmiColors, &bFailedCRC);
          if (rc && sizeof_image > 0 && sizeof_buffer == sizeof_colors)
          {
            // 28 July 2003
            //     Added support for reading non-contiguous bitmaps
            sizeof_buffer = 0;
            rc = file.ReadCompressedBufferSize (&sizeof_buffer);
            if (rc)
            {
              if (sizeof_buffer == sizeof_image)
              {
                // image bits are compressed into a separatechunk
                rc = file.ReadCompressedBuffer (sizeof_buffer, &m_bmi->bmiColors[color_count], &bFailedCRC);
              }
              else
              {
                ON_ERROR("ON_WindowsBitmap::ReadCompressed() image bits buffer size mismatch\n");
                rc = false;
              }
            }
          }
        }
        else
        {
          ON_ERROR("ON_WindowsBitmap::ReadCompressed() buffer size mismatch\n");
          rc = false;
        }
      }
    }
  }
  return rc;
}

bool
ON_WindowsBitmap::IsContiguous () const
{
  bool rc = false;
  if (0 != m_bmi && 0 != m_bits && m_bmi->bmiHeader.biSizeImage > 0)
  {
    // p1 points to the first byte after the color palette.
    unsigned char* p1 = (unsigned char*)&m_bmi->bmiColors[PaletteColorCount ()];
    rc = (m_bits == p1);
  }
  return rc;
}

#if defined(ON_OS_WINDOWS_GDI)

#pragma message( " --- OpenNURBS including Windows BITMAPINFO support in ON_WindowsBitmap" )

ON_WindowsBitmap::ON_WindowsBitmap( const BITMAPINFO& src )
: m_bmi(0), m_bits(0), m_bFreeBMI(0)
{
  *this = src;
}

ON_WindowsBitmap& ON_WindowsBitmap::operator=( const BITMAPINFO& src )
{
  Destroy();
  int color_count = ON_WindowsBitmapHelper_PaletteColorCount(src.bmiHeader.biClrUsed, src.bmiHeader.biBitCount );
  Create(&src,(const unsigned char*)(&src.bmiColors[color_count]),true);
  return *this;
}

bool ON_WindowsBitmap::Create( const BITMAPINFO* bmi, const unsigned char* bits, bool bCopy )
{
  bool rc = false;
  Destroy();
  m_bFreeBMI = 0;
  m_bmi = 0;
  m_bits = 0;

  if ( 0 != bmi )
  {
    if ( bCopy )
    {
      // allocate a contiguous Windows device independent bitmap
      const size_t sizeof_palette = ON_WindowsBitmapHelper_SizeofPalette(bmi->bmiHeader.biClrUsed, bmi->bmiHeader.biBitCount );
      const int sizeof_image = bmi->bmiHeader.biSizeImage;
      m_bmi = ON_WindowsBitmapHelper_AllocBMI( sizeof_palette, (bCopy?sizeof_image:0) );
      if ( 0 != m_bmi )
      {
        rc = true;
        m_bFreeBMI = 1; // ~ON_WindowsBitmap will free the m_bmi pointer
        m_bmi->bmiHeader = bmi->bmiHeader;
        m_bmi->bmiHeader.biSize = sizeof(m_bmi->bmiHeader);
        int color_count = ON_WindowsBitmapHelper_PaletteColorCount(bmi->bmiHeader.biClrUsed, bmi->bmiHeader.biBitCount );
        if ( color_count > 0 )
        {
          memcpy( &m_bmi->bmiColors[0], &bmi->bmiColors[0], color_count*sizeof(m_bmi->bmiColors[0]) );
        }
        if ( bCopy && sizeof_image > 0 )
        {
          m_bits = (unsigned char*)(&m_bmi->bmiColors[color_count]);
          if ( 0 != bits )
          memcpy( m_bits, bits, sizeof_image );
          else
          memset( m_bits, 0, sizeof_image );
        }
      }
    }
    else
    {
      // share BITMAPINFO memory
      rc = true;
      m_bmi = const_cast<BITMAPINFO*>(bmi);
      m_bits = const_cast<unsigned char*>(bits);
    }
  }

  return rc;
}

ON_WindowsBitmap::ON_WindowsBitmap( const BITMAPINFO* src )
: m_bmi(0), m_bits(0), m_bFreeBMI(0)
{
  if ( 0 != src )
  {
    int color_count = ON_WindowsBitmapHelper_PaletteColorCount(src->bmiHeader.biClrUsed, src->bmiHeader.biBitCount );
    Create(src,(const unsigned char*)(&src->bmiColors[color_count]),false);
  }
}

//BITMAPINFO* ON_WindowsBitmap::Convert()
//{
//  return m_bmi;
//}

#endif

//
// ON_EmbeddedBitmap - used to embed bitmaps in 3dm archives
//

ON_EmbeddedBitmap::ON_EmbeddedBitmap ()
{
  m_buffer = 0;
  m_sizeof_buffer = 0;
  m_free_buffer = 0;
  m_biffer_crc32 = 0;
}

ON_EmbeddedBitmap::~ON_EmbeddedBitmap ()
{
  Destroy ();
}

void
ON_EmbeddedBitmap::EmergencyDestroy ()
{
  m_buffer = 0;
  m_sizeof_buffer = 0;
  m_free_buffer = 0;
  m_biffer_crc32 = 0;
  ON_Bitmap::EmergencyDestroy ();
}

void
ON_EmbeddedBitmap::Destroy ()
{
  if (0 != m_buffer && 1 == m_free_buffer)
  {
    onfree (m_buffer);
    m_buffer = 0;
  }
  m_sizeof_buffer = 0;
  m_free_buffer = 0;
  m_biffer_crc32 = 0;
  ON_Bitmap::Destroy ();
}

void
ON_EmbeddedBitmap::Create (int sizeof_buffer)
{
  Destroy ();
  if (sizeof_buffer > 0)
  {
    m_buffer = onmalloc (sizeof_buffer);
    if (0 != m_buffer)
    {
      m_sizeof_buffer = sizeof_buffer;
      m_free_buffer = 1;
    }
  }
}

ON_BOOL32
ON_EmbeddedBitmap::IsValid (ON_TextLog* text_log) const
{
  if (0 == m_buffer)
  {
    if (0 != text_log)
      text_log->Print ("ON_EmbeddedBitmap m_buffer = 0\n");
    return false;
  }
  return true;
}

ON_BOOL32
ON_EmbeddedBitmap::Write (ON_BinaryArchive& file) const
{
  ON_BOOL32 rc = file.Write3dmChunkVersion (1, 0);
  if (rc)
    rc = file.WriteString (m_bitmap_filename);
  if (rc)
    rc = file.WriteInt (m_biffer_crc32);
  int i = 1; // 0 = uncompressed, 1 = compressed
  if (rc)
    rc = file.WriteInt (i); // 1 = compressed
  switch (i)
  {
    case 0:
      if (rc)
        rc = file.WriteSize (m_sizeof_buffer);
      if (rc)
        rc = file.WriteByte (m_sizeof_buffer, m_buffer);
      break;
    case 1:
      if (rc)
        rc = file.WriteCompressedBuffer (m_sizeof_buffer, m_buffer);
      break;
  }
  return rc;
}

ON_BOOL32
ON_EmbeddedBitmap::Read (ON_BinaryArchive& file)
{
  ON_BOOL32 bFailedCRC = false;
  Destroy ();

  int major_version = 0;
  int minor_version = 0;
  ON_BOOL32 rc = file.Read3dmChunkVersion (&major_version, &minor_version);
  if (rc && 1 == major_version)
  {
    int i = -1;
    if (rc)
      rc = file.ReadString (m_bitmap_filename);
    if (rc)
      rc = file.ReadInt (&m_biffer_crc32);
    rc = file.ReadInt (&i);
    if (rc)
    {
      switch (i)
      {
        case 0:
          if (rc)
          {
            if (rc)
              rc = file.ReadSize (&m_sizeof_buffer);
            if (rc && m_sizeof_buffer > 0)
            {
              m_buffer = onmalloc (m_sizeof_buffer);
              m_free_buffer = 1;
            }
            if (rc)
              rc = file.ReadByte (m_sizeof_buffer, m_buffer);
          }
          break;
        case 1:
          if (rc)
          {
            if (rc)
              rc = file.ReadCompressedBufferSize (&m_sizeof_buffer);
            if (rc && m_sizeof_buffer > 0)
            {
              m_buffer = onmalloc (m_sizeof_buffer);
              m_free_buffer = 1;
            }
            if (rc)
              rc = file.ReadCompressedBuffer (m_sizeof_buffer, m_buffer, &bFailedCRC);
          }
          break;
      }
    }
  }
  else
    rc = false;

  return rc;
}

int
ON_EmbeddedBitmap::Width () const
{
  return 0;
}
int
ON_EmbeddedBitmap::Height () const
{
  return 0;
}
int
ON_EmbeddedBitmap::BitsPerPixel () const
{
  return 0;
}
int
ON_EmbeddedBitmap::SizeofScan () const
{
  return 0;
}
int
ON_EmbeddedBitmap::SizeofImage () const
{
  return 0;
}
unsigned char*
ON_EmbeddedBitmap::Bits (int)
{
  return 0;
}
const unsigned char*
ON_EmbeddedBitmap::Bits (int) const
{
  return 0;
}