wxWidgets/include/wx/msw/dibutils.h
1999-10-04 11:39:13 +00:00

133 lines
5.4 KiB
C

/////////////////////////////////////////////////////////////////////////////
// Name: dibutils.h
// Purpose: Utilities for DIBs
// Author: Julian Smart
// Modified by:
// Created: 04/01/98
// RCS-ID: $Id$
// Copyright: (c) Microsoft, Julian Smart
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
/***************************************************************************
(C) Copyright 1994 Microsoft Corp. All rights reserved.
You have a royalty-free right to use, modify, reproduce and
distribute the Sample Files (and/or any modified version) in
any way you find useful, provided that you agree that
Microsoft has no warranty obligations or liability for any
Sample Application Files which are modified.
**************************************************************************/
/***************************************************************************
Functions for handling Device Independent Bitmaps and clearing the
System Palette.
**************************************************************************/
#ifndef SAMPLES_UTILS_H
#define SAMPLES_UTILS_H
#ifdef __GNUG__
#pragma interface "dibutils.h"
#endif
typedef LPBITMAPINFOHEADER PDIB;
typedef HANDLE HDIB;
/***************************************************************************
External function declarations
**************************************************************************/
void wxClearSystemPalette(void);
PDIB wxDibOpenFile(LPTSTR szFile);
int wxDibWriteFile(LPTSTR szFile, LPBITMAPINFOHEADER lpbi);
BOOL wxDibSetUsage(PDIB pdib, HPALETTE hpal,UINT wUsage);
PDIB wxDibCreate(int bits, int dx, int dy);
BOOL wxDibMapToPalette(PDIB pdib, HPALETTE hpal);
HPALETTE wxMakePalette(const BITMAPINFO FAR* Info, UINT flags);
/****************************************************************************
Internal function declarations
***************************************************************************/
PDIB wxDibReadBitmapInfo(HFILE fh);
/****************************************************************************
DIB macros.
***************************************************************************/
#ifdef WIN32
#define wxHandleFromDib(lpbi) GlobalHandle(lpbi)
#else
#define wxHandleFromDib(lpbi) (HANDLE)GlobalHandle(SELECTOROF(lpbi))
#endif
#define wxDibFromHandle(h) (PDIB)GlobalLock(h)
#define wxDibFree(pdib) GlobalFreePtr(pdib)
#define wxWIDTHBYTES(i) ((unsigned)((i+31)&(~31))/8) /* ULONG aligned ! */
#define wxDibWidth(lpbi) (UINT)(((LPBITMAPINFOHEADER)(lpbi))->biWidth)
#define wxDibHeight(lpbi) (UINT)(((LPBITMAPINFOHEADER)(lpbi))->biHeight)
#define wxDibBitCount(lpbi) (UINT)(((LPBITMAPINFOHEADER)(lpbi))->biBitCount)
#define wxDibCompression(lpbi) (DWORD)(((LPBITMAPINFOHEADER)(lpbi))->biCompression)
#define wxDibWidthBytesN(lpbi, n) (UINT)wxWIDTHBYTES((UINT)(lpbi)->biWidth * (UINT)(n))
#define wxDibWidthBytes(lpbi) wxDibWidthBytesN(lpbi, (lpbi)->biBitCount)
#define wxDibSizeImage(lpbi) ((lpbi)->biSizeImage == 0 \
? ((DWORD)(UINT)wxDibWidthBytes(lpbi) * (DWORD)(UINT)(lpbi)->biHeight) \
: (lpbi)->biSizeImage)
#define wxDibSize(lpbi) ((lpbi)->biSize + (lpbi)->biSizeImage + (int)(lpbi)->biClrUsed * sizeof(RGBQUAD))
#define wxDibPaletteSize(lpbi) (wxDibNumColors(lpbi) * sizeof(RGBQUAD))
#define wxDibFlipY(lpbi, y) ((int)(lpbi)->biHeight-1-(y))
//HACK for NT BI_BITFIELDS DIBs
#ifdef WIN32
#define wxDibPtr(lpbi) ((lpbi)->biCompression == BI_BITFIELDS \
? (LPVOID)(wxDibColors(lpbi) + 3) \
: (LPVOID)(wxDibColors(lpbi) + (UINT)(lpbi)->biClrUsed))
#else
#define wxDibPtr(lpbi) (LPVOID)(wxDibColors(lpbi) + (UINT)(lpbi)->biClrUsed)
#endif
#define wxDibColors(lpbi) ((RGBQUAD FAR *)((LPBYTE)(lpbi) + (int)(lpbi)->biSize))
#define wxDibNumColors(lpbi) ((lpbi)->biClrUsed == 0 && (lpbi)->biBitCount <= 8 \
? (int)(1 << (int)(lpbi)->biBitCount) \
: (int)(lpbi)->biClrUsed)
#define wxDibXYN(lpbi,pb,x,y,n) (LPVOID)( \
(BYTE _huge *)(pb) + \
(UINT)((UINT)(x) * (UINT)(n) / 8u) + \
((DWORD)wxDibWidthBytesN(lpbi,n) * (DWORD)(UINT)(y)))
#define wxDibXY(lpbi,x,y) wxDibXYN(lpbi,wxDibPtr(lpbi),x,y,(lpbi)->biBitCount)
#define wxFixBitmapInfo(lpbi) if ((lpbi)->biSizeImage == 0) \
(lpbi)->biSizeImage = wxDibSizeImage(lpbi); \
if ((lpbi)->biClrUsed == 0) \
(lpbi)->biClrUsed = wxDibNumColors(lpbi);
// if ((lpbi)->biCompression == BI_BITFIELDS && (lpbi)->biClrUsed == 0)
// ; // (lpbi)->biClrUsed = 3;
#define wxDibInfo(pDIB) ((BITMAPINFO FAR *)(pDIB))
/***************************************************************************/
#ifndef BI_BITFIELDS
#define BI_BITFIELDS 3
#endif
#ifndef HALFTONE
#define HALFTONE COLORONCOLOR
#endif
#endif