1998-05-20 10:12:05 -04:00
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/////////////////////////////////////////////////////////////////////////////
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// Name: dibutils.h
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// Purpose: Utilities for DIBs
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// Author: Julian Smart
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// Modified by:
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// Created: 04/01/98
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// RCS-ID: $Id$
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// Copyright: (c) Microsoft, Julian Smart
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1998-08-07 19:52:45 -04:00
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// Licence: wxWindows licence
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1998-05-20 10:12:05 -04:00
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/////////////////////////////////////////////////////////////////////////////
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/***************************************************************************
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(C) Copyright 1994 Microsoft Corp. All rights reserved.
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You have a royalty-free right to use, modify, reproduce and
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distribute the Sample Files (and/or any modified version) in
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any way you find useful, provided that you agree that
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Microsoft has no warranty obligations or liability for any
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Sample Application Files which are modified.
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**************************************************************************/
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/***************************************************************************
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Functions for handling Device Independent Bitmaps and clearing the
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System Palette.
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**************************************************************************/
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#ifndef SAMPLES_UTILS_H
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#define SAMPLES_UTILS_H
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#ifdef __GNUG__
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#pragma interface "dibutils.h"
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#endif
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typedef LPBITMAPINFOHEADER PDIB;
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typedef HANDLE HDIB;
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/***************************************************************************
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External function declarations
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**************************************************************************/
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void ClearSystemPalette(void);
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PDIB DibOpenFile(LPSTR szFile);
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int DibWriteFile(LPSTR szFile, LPBITMAPINFOHEADER lpbi);
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BOOL DibSetUsage(PDIB pdib, HPALETTE hpal,UINT wUsage);
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PDIB DibCreate(int bits, int dx, int dy);
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BOOL DibMapToPalette(PDIB pdib, HPALETTE hpal);
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HPALETTE MakePalette(const BITMAPINFO FAR* Info, UINT flags);
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/****************************************************************************
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Internal function declarations
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***************************************************************************/
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PDIB DibReadBitmapInfo(HFILE fh);
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/****************************************************************************
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DIB macros.
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***************************************************************************/
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#ifdef WIN32
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#define HandleFromDib(lpbi) GlobalHandle(lpbi)
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#else
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#define HandleFromDib(lpbi) (HANDLE)GlobalHandle(SELECTOROF(lpbi))
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#endif
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#define DibFromHandle(h) (PDIB)GlobalLock(h)
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#define DibFree(pdib) GlobalFreePtr(pdib)
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#define WIDTHBYTES(i) ((unsigned)((i+31)&(~31))/8) /* ULONG aligned ! */
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#define DibWidth(lpbi) (UINT)(((LPBITMAPINFOHEADER)(lpbi))->biWidth)
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#define DibHeight(lpbi) (UINT)(((LPBITMAPINFOHEADER)(lpbi))->biHeight)
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#define DibBitCount(lpbi) (UINT)(((LPBITMAPINFOHEADER)(lpbi))->biBitCount)
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#define DibCompression(lpbi) (DWORD)(((LPBITMAPINFOHEADER)(lpbi))->biCompression)
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#define DibWidthBytesN(lpbi, n) (UINT)WIDTHBYTES((UINT)(lpbi)->biWidth * (UINT)(n))
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#define DibWidthBytes(lpbi) DibWidthBytesN(lpbi, (lpbi)->biBitCount)
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#define DibSizeImage(lpbi) ((lpbi)->biSizeImage == 0 \
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? ((DWORD)(UINT)DibWidthBytes(lpbi) * (DWORD)(UINT)(lpbi)->biHeight) \
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: (lpbi)->biSizeImage)
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#define DibSize(lpbi) ((lpbi)->biSize + (lpbi)->biSizeImage + (int)(lpbi)->biClrUsed * sizeof(RGBQUAD))
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#define DibPaletteSize(lpbi) (DibNumColors(lpbi) * sizeof(RGBQUAD))
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#define DibFlipY(lpbi, y) ((int)(lpbi)->biHeight-1-(y))
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//HACK for NT BI_BITFIELDS DIBs
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#ifdef WIN32
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#define DibPtr(lpbi) ((lpbi)->biCompression == BI_BITFIELDS \
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? (LPVOID)(DibColors(lpbi) + 3) \
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: (LPVOID)(DibColors(lpbi) + (UINT)(lpbi)->biClrUsed))
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#else
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#define DibPtr(lpbi) (LPVOID)(DibColors(lpbi) + (UINT)(lpbi)->biClrUsed)
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#endif
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#define DibColors(lpbi) ((RGBQUAD FAR *)((LPBYTE)(lpbi) + (int)(lpbi)->biSize))
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#define DibNumColors(lpbi) ((lpbi)->biClrUsed == 0 && (lpbi)->biBitCount <= 8 \
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? (int)(1 << (int)(lpbi)->biBitCount) \
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: (int)(lpbi)->biClrUsed)
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#define DibXYN(lpbi,pb,x,y,n) (LPVOID)( \
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(BYTE _huge *)(pb) + \
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(UINT)((UINT)(x) * (UINT)(n) / 8u) + \
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((DWORD)DibWidthBytesN(lpbi,n) * (DWORD)(UINT)(y)))
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#define DibXY(lpbi,x,y) DibXYN(lpbi,DibPtr(lpbi),x,y,(lpbi)->biBitCount)
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#define FixBitmapInfo(lpbi) if ((lpbi)->biSizeImage == 0) \
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(lpbi)->biSizeImage = DibSizeImage(lpbi); \
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if ((lpbi)->biClrUsed == 0) \
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(lpbi)->biClrUsed = DibNumColors(lpbi); \
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if ((lpbi)->biCompression == BI_BITFIELDS && (lpbi)->biClrUsed == 0) \
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; // (lpbi)->biClrUsed = 3;
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#define DibInfo(pDIB) ((BITMAPINFO FAR *)(pDIB))
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/***************************************************************************/
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#ifndef BI_BITFIELDS
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#define BI_BITFIELDS 3
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#endif
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#ifndef HALFTONE
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#define HALFTONE COLORONCOLOR
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#endif
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#endif
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