include/wx/msw/dibutils.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dibutils.h
   3 // Purpose:     Utilities for DIBs
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Microsoft, Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 /***************************************************************************
  13
  14     (C) Copyright 1994 Microsoft Corp.  All rights reserved.
  15
  16     You have a royalty-free right to use, modify, reproduce and
  17     distribute the Sample Files (and/or any modified version) in
  18     any way you find useful, provided that you agree that
  19          Microsoft has no warranty obligations or liability for any
  20     Sample Application Files which are modified.
  21
  22  **************************************************************************/
  23
  24 /***************************************************************************
  25     Functions for handling Device Independent Bitmaps and clearing the
  26          System Palette.
  27  **************************************************************************/
  28
  29 #ifndef SAMPLES_UTILS_H
  30 #define SAMPLES_UTILS_H
  31
  32 #ifdef __GNUG__
  33 #pragma interface "dibutils.h"
  34 #endif
  35
  36 typedef     LPBITMAPINFOHEADER PDIB;
  37 typedef     HANDLE             HDIB;
  38
  39 /***************************************************************************
  40    External function declarations
  41  **************************************************************************/
  42
  43 void        ClearSystemPalette(void);
  44 PDIB        DibOpenFile(LPSTR szFile);
  45 int                     DibWriteFile(LPSTR szFile, LPBITMAPINFOHEADER lpbi);
  46 BOOL        DibSetUsage(PDIB pdib, HPALETTE hpal,UINT wUsage);
  47 PDIB        DibCreate(int bits, int dx, int dy);
  48 BOOL        DibMapToPalette(PDIB pdib, HPALETTE hpal);
  49 HPALETTE MakePalette(const BITMAPINFO FAR* Info, UINT flags);
  50
  51 /****************************************************************************
  52    Internal function declarations
  53  ***************************************************************************/
  54
  55 PDIB        DibReadBitmapInfo(HFILE fh);
  56
  57 /****************************************************************************
  58    DIB macros.
  59  ***************************************************************************/
  60
  61 #ifdef  WIN32
  62          #define HandleFromDib(lpbi) GlobalHandle(lpbi)
  63 #else
  64     #define HandleFromDib(lpbi) (HANDLE)GlobalHandle(SELECTOROF(lpbi))
  65 #endif
  66
  67 #define DibFromHandle(h)        (PDIB)GlobalLock(h)
  68
  69 #define DibFree(pdib)           GlobalFreePtr(pdib)
  70
  71 #define WIDTHBYTES(i)           ((unsigned)((i+31)&(~31))/8)  /* ULONG aligned ! */
  72
  73 #define DibWidth(lpbi)          (UINT)(((LPBITMAPINFOHEADER)(lpbi))->biWidth)
  74 #define DibHeight(lpbi)         (UINT)(((LPBITMAPINFOHEADER)(lpbi))->biHeight)
  75 #define DibBitCount(lpbi)       (UINT)(((LPBITMAPINFOHEADER)(lpbi))->biBitCount)
  76 #define DibCompression(lpbi)    (DWORD)(((LPBITMAPINFOHEADER)(lpbi))->biCompression)
  77
  78 #define DibWidthBytesN(lpbi, n) (UINT)WIDTHBYTES((UINT)(lpbi)->biWidth * (UINT)(n))
  79 #define DibWidthBytes(lpbi)     DibWidthBytesN(lpbi, (lpbi)->biBitCount)
  80
  81 #define DibSizeImage(lpbi)      ((lpbi)->biSizeImage == 0 \
  82                                     ? ((DWORD)(UINT)DibWidthBytes(lpbi) * (DWORD)(UINT)(lpbi)->biHeight) \
  83                                     : (lpbi)->biSizeImage)
  84
  85 #define DibSize(lpbi)           ((lpbi)->biSize + (lpbi)->biSizeImage + (int)(lpbi)->biClrUsed * sizeof(RGBQUAD))
  86 #define DibPaletteSize(lpbi)    (DibNumColors(lpbi) * sizeof(RGBQUAD))
  87
  88 #define DibFlipY(lpbi, y)       ((int)(lpbi)->biHeight-1-(y))
  89
  90 //HACK for NT BI_BITFIELDS DIBs
  91 #ifdef WIN32
  92     #define DibPtr(lpbi)            ((lpbi)->biCompression == BI_BITFIELDS \
  93                                        ? (LPVOID)(DibColors(lpbi) + 3) \
  94                                        : (LPVOID)(DibColors(lpbi) + (UINT)(lpbi)->biClrUsed))
  95 #else
  96          #define DibPtr(lpbi)            (LPVOID)(DibColors(lpbi) + (UINT)(lpbi)->biClrUsed)
  97 #endif
  98
  99 #define DibColors(lpbi)         ((RGBQUAD FAR *)((LPBYTE)(lpbi) + (int)(lpbi)->biSize))
 100
 101 #define DibNumColors(lpbi)      ((lpbi)->biClrUsed == 0 && (lpbi)->biBitCount <= 8 \
 102                                     ? (int)(1 << (int)(lpbi)->biBitCount)          \
 103                                     : (int)(lpbi)->biClrUsed)
 104
 105 #define DibXYN(lpbi,pb,x,y,n)   (LPVOID)(                                     \
 106                                 (BYTE _huge *)(pb) +                          \
 107                                 (UINT)((UINT)(x) * (UINT)(n) / 8u) +          \
 108                                 ((DWORD)DibWidthBytesN(lpbi,n) * (DWORD)(UINT)(y)))
 109
 110 #define DibXY(lpbi,x,y)         DibXYN(lpbi,DibPtr(lpbi),x,y,(lpbi)->biBitCount)
 111
 112 #define FixBitmapInfo(lpbi)     if ((lpbi)->biSizeImage == 0)                 \
 113                                                                                                 (lpbi)->biSizeImage = DibSizeImage(lpbi); \
 114                                 if ((lpbi)->biClrUsed == 0)                   \
 115                                     (lpbi)->biClrUsed = DibNumColors(lpbi);   \
 116                                 if ((lpbi)->biCompression == BI_BITFIELDS && (lpbi)->biClrUsed == 0) \
 117                                     ; // (lpbi)->biClrUsed = 3;
 118
 119 #define DibInfo(pDIB)     ((BITMAPINFO FAR *)(pDIB))
 120
 121 /***************************************************************************/
 122
 123 #ifndef BI_BITFIELDS
 124   #define BI_BITFIELDS 3
 125 #endif
 126
 127 #ifndef HALFTONE
 128   #define HALFTONE COLORONCOLOR
 129 #endif
 130
 131 #endif