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|
/*
/--------------------------------------------------------------------
|
| Windows bitmap file encoder. Encodes 1, 4, 8, 24 and 32 bpp
| bitmaps to a 1, 4, 8 or 24 bpp uncompressed BMP file
|
| Copyright (c) 1996-2002 Ulrich von Zadow
|
\--------------------------------------------------------------------
*/
#include "plbmpenc.h"
#include "plwindefs.h"
#include "plexcept.h"
/////////////////////////////////////////////////////////////////////
// Class functions
PLBmpEncoder::PLBmpEncoder
() : PLPicEncoder()
// Creates an encoder
{
// nothing to do (yet)
}
PLBmpEncoder::~PLBmpEncoder
()
{
// nothing to do (yet)
}
int PLBmpEncoder::GetLineMemNeeded (PLLONG width, PLWORD BitsPerPixel)
{
// Calculate memory per line.
int LineMem = width * BitsPerPixel / 8;
if (BitsPerPixel == 1 && width % 8)
++LineMem;
// DWORD alignment
return ((LineMem + 3) & ~3);
}
void PLBmpEncoder::DoEncode
( PLBmpBase * pBmp,
PLDataSink * pSink
)
{
int BPP = pBmp->GetBitsPerPixel();
WINBITMAPFILEHEADER BFH;
BFH.bfType = *((PLWORD*)"BM");
BFH.bfReserved1 = 0;
BFH.bfReserved2 = 0;
BFH.bfOffBits = sizeof (WINBITMAPFILEHEADER) +
sizeof (WINBITMAPINFOHEADER);
if (BPP <= 8) // include palette
BFH.bfOffBits += (1 << BPP) * sizeof(WINRGBQUAD);
BFH.bfSize = BFH.bfOffBits;
BFH.bfSize += pBmp->GetHeight()*GetLineMemNeeded(pBmp->GetWidth(), BPP);
pSink->WriteNBytes( sizeof (WINBITMAPFILEHEADER), (PLBYTE *) &BFH);
WINBITMAPINFOHEADER FileBMI;
FileBMI.biSize = sizeof(WINBITMAPINFOHEADER);
FileBMI.biWidth = pBmp->GetWidth ();
FileBMI.biHeight = pBmp->GetHeight ();
FileBMI.biPlanes = 1;
FileBMI.biCompression = BI_RGB;
FileBMI.biSizeImage = 0; // may be 0 for non-compressed files
FileBMI.biXPelsPerMeter = (int)((float)pBmp->GetResolution().x * 39.37f+0.5);
FileBMI.biYPelsPerMeter = (int)((float)pBmp->GetResolution().y * 39.37f+0.5);
FileBMI.biClrUsed = 0;
FileBMI.biClrImportant = 0;
int x,y;
if (BPP <= 8)
{
PLBYTE * pCurLine;
FileBMI.biBitCount = BPP; // not 32...
pSink->WriteNBytes (sizeof (WINBITMAPINFOHEADER), (PLBYTE *) &FileBMI);
// Write Palette
PLPixel32 * pPal = pBmp->GetPalette();
for (int i=0; i<(1<<BPP); i++)
{
pSink->WriteByte (pPal[i].GetB());
pSink->WriteByte (pPal[i].GetG());
pSink->WriteByte (pPal[i].GetR());
pSink->WriteByte (pPal[i].GetA());
}
for (y=FileBMI.biHeight-1; y>=0; y--)
{
pCurLine = pBmp->GetLineArray()[y];
int BytesPerLine = pBmp->GetWidth()*pBmp->GetBitsPerPixel()/8;
pSink->WriteNBytes (BytesPerLine, pCurLine);
int PadBytes = GetLineMemNeeded(pBmp->GetWidth(), BPP)
- BytesPerLine;
pSink->Skip(PadBytes);
}
}
else
{
PLPixel32 * pCurLine;
FileBMI.biBitCount = 24; // not 32...
pSink->WriteNBytes (sizeof (WINBITMAPINFOHEADER),(PLBYTE *) &FileBMI);
int LinePadding = 4-((FileBMI.biWidth*3)&3);
if (LinePadding == 4)
LinePadding = 0;
for (y=FileBMI.biHeight-1; y>=0; y--)
{
pCurLine = pBmp->GetLineArray32()[y];
for (x=0; x<FileBMI.biWidth; x++)
{
pSink->WriteByte (pCurLine[x].GetB());
pSink->WriteByte (pCurLine[x].GetG());
pSink->WriteByte (pCurLine[x].GetR());
}
pSink->WriteNBytes(LinePadding,(PLBYTE *) " ");
}
}
}
/*
/--------------------------------------------------------------------
|
| $Log: plbmpenc.cpp,v $
| Revision 1.9 2004/09/11 12:41:35 uzadow
| removed plstdpch.h
|
| Revision 1.8 2004/06/19 18:16:33 uzadow
| Documentation update
|
| Revision 1.7 2002/03/31 13:36:41 uzadow
| Updated copyright.
|
| Revision 1.6 2001/10/21 17:12:39 uzadow
| Added PSD decoder beta, removed BPPWanted from all decoders, added PLFilterPixel.
|
| Revision 1.5 2001/10/16 17:12:26 uzadow
| Added support for resolution information (Luca Piergentili)
|
| Revision 1.4 2001/10/06 22:37:08 uzadow
| Linux compatibility.
|
| Revision 1.3 2001/10/06 22:03:26 uzadow
| Added PL prefix to basic data types.
|
| Revision 1.2 2001/10/06 20:44:45 uzadow
| Linux compatibility
|
| Revision 1.1 2001/09/16 19:03:22 uzadow
| Added global name prefix PL, changed most filenames.
|
| Revision 1.8 2001/02/04 14:31:52 uzadow
| Member initialization list cleanup (Erik Hoffmann).
|
| Revision 1.7 2000/12/02 19:52:12 uzadow
| no message
|
| Revision 1.6 2000/12/02 19:50:01 uzadow
| Added Logging.
|
| 31.10.2000 - Jos Miguel Buenaposada
| Corrected the order for writing color channels
| to work with other channels orders.
|
| 27.08.2000 - Martin Skinner
| now uses PLDataSink instead of MFC CFile
| moved to a new class PLBmpEncoder
|
| 11.01.2000 - Michael Salzlechner
| moved code from PLWinBmp to CAfxBmp
|
| 21.01.99 - Added by M.Skinner
| Moved program logic from
| PLWinBmp::SaveAsBmp(const char *) to here
|
\--------------------------------------------------------------------
*/
|
