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|
/*
/--------------------------------------------------------------------
|
| $Id: planybmp.cpp,v 1.9 2004/09/11 12:41:34 uzadow Exp $
| Device independent bitmap class
|
| Plattform-independent version
|
| Manipulates uncompressed device independent bitmaps.
|
| Supported data formats are 8, 24 (partial) and 32 bpp. The
| data is stored sequentially without padding in the bitmap.
|
| Copyright (c) 1996-2002 Ulrich von Zadow
|
\--------------------------------------------------------------------
*/
#include "planybmp.h"
#include "plexcept.h"
#include <iostream>
using namespace std;
PLAnyBmp::PLAnyBmp
() : m_pBits(NULL)
// Creates an empty bitmap.
{
internalCreate(16, 16, PLPixelFormat::I8);
PLASSERT_VALID(this);
}
PLAnyBmp::~PLAnyBmp
()
{
// Free the memory.
freeMembers();
}
long PLAnyBmp::GetMemUsed
()
// Returns the memory used by the object.
{
PLASSERT_VALID (this);
return GetMemNeeded (GetWidth(), GetHeight(), GetBitsPerPixel())+
sizeof (*this);
}
long PLAnyBmp::GetBytesPerLine
()
// Returns number of bytes used per line.
{
// bdelmee code change
int nBytes = GetWidth() * GetBitsPerPixel() / 8;
if (GetBitsPerPixel() == 1 && GetWidth() % 8)
++nBytes;
return nBytes;
}
/////////////////////////////////////////////////////////////////////
// Static functions
long PLAnyBmp::GetBitsMemNeeded
( PLLONG width,
PLLONG height,
PLWORD BitsPerPixel
)
// Returns memory needed by bitmap bits.
{
// Calculate memory per line.
int LineMem = width*BitsPerPixel/8;
// bdelmee code change
if (BitsPerPixel == 1 && width % 8)
++LineMem;
// Multiply by number of lines
return LineMem*height;
}
long PLAnyBmp::GetMemNeeded
( PLLONG width,
PLLONG height,
PLWORD BitsPerPixel
)
// Returns memory needed by a bitmap with the specified attributes.
{
int HeaderMem = sizeof (PLAnyBmp);
if (BitsPerPixel < 16)
{ // Palette memory
HeaderMem += (1 << BitsPerPixel)*sizeof (PLPixel32);
}
return HeaderMem+GetBitsMemNeeded (width, height, BitsPerPixel);
}
/////////////////////////////////////////////////////////////////////
// Local functions
void PLAnyBmp::internalCreate
( PLLONG Width,
PLLONG Height,
const PLPixelFormat& pf
)
// Create a new empty bitmap. Bits are uninitialized.
// Assumes that no memory is allocated before the call.
{
// Allocate memory
#ifdef MAX_BITMAP_SIZE
int MemNeeded = GetMemNeeded (Width, Height, pf.GetBitsPerPixel());
if (MemNeeded > MAX_BITMAP_SIZE)
throw PLTextException(PL_ERRDIB_TOO_LARGE, "Bitmap size too large.\n");
#endif
m_pBits = new PLBYTE [GetBitsMemNeeded (Width, Height, pf.GetBitsPerPixel())];
if (pf.GetBitsPerPixel() <= 8)
m_pClrTab = new PLPixel32 [1 << pf.GetBitsPerPixel()];
else
m_pClrTab = NULL;
initLocals (Width, Height, pf);
PLASSERT_VALID (this);
}
void PLAnyBmp::initLineArray
()
{
m_pLineArray = new PLBYTE * [m_Size.y];
int LineLen = GetBytesPerLine();
for (int y=0; y<m_Size.y; y++)
m_pLineArray[y] = m_pBits + y*LineLen;
}
void PLAnyBmp::freeMembers
()
{
delete [] m_pBits;
m_pBits = NULL;
if (m_pClrTab)
{
delete [] m_pClrTab;
m_pClrTab = NULL;
}
delete [] m_pLineArray;
m_pLineArray = NULL;
}
/*
/--------------------------------------------------------------------
|
| $Log: planybmp.cpp,v $
| Revision 1.9 2004/09/11 12:41:34 uzadow
| removed plstdpch.h
|
| Revision 1.8 2004/09/09 16:52:49 artcom
| refactored PixelFormat
|
| Revision 1.7 2004/06/15 11:18:16 uzadow
| First working version of PLBmpBase.
|
| Revision 1.6 2004/06/15 10:26:05 uzadow
| Initial nonfunctioning version of plbmpbase.
|
| Revision 1.5 2004/06/09 21:34:53 uzadow
| Added 16 bpp support to plbitmap, planybmp and pldirectfbbmp
|
| Revision 1.4 2002/08/04 20:08:01 uzadow
| Added PLBmpInfo class, ability to extract metainformation from images
| without loading the whole image and proper greyscale support.
|
| Revision 1.3 2002/02/24 13:00:12 uzadow
| Documentation update; removed buggy PLFilterRotate.
|
| Revision 1.2 2001/10/06 22:03:26 uzadow
| Added PL prefix to basic data types.
|
| Revision 1.1 2001/09/16 19:03:22 uzadow
| Added global name prefix PL, changed most filenames.
|
| Revision 1.10 2001/02/04 14:31:52 uzadow
| Member initialization list cleanup (Erik Hoffmann).
|
| Revision 1.9 2001/01/21 14:28:21 uzadow
| Changed array cleanup from delete to delete[].
|
| Revision 1.8 2000/12/18 22:42:52 uzadow
| Replaced RGBAPIXEL with PLPixel32.
|
| Revision 1.7 2000/08/13 12:11:43 Administrator
| Added experimental DirectDraw-Support
|
| Revision 1.6 2000/01/16 20:43:12 anonymous
| Removed MFC dependencies
|
| Revision 1.5 2000/01/10 23:52:59 Ulrich von Zadow
| Changed formatting & removed tabs.
|
| Revision 1.4 1999/12/08 15:39:45 Ulrich von Zadow
| Unix compatibility changes
|
| Revision 1.3 1999/10/03 18:50:51 Ulrich von Zadow
| Added automatic logging of changes.
|
|
\--------------------------------------------------------------------
*/
|
