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        wxClearSystemPalette(void);
  44 PDIB        wxDibOpenFile(LPTSTR szFile);
  45 int                     wxDibWriteFile(LPTSTR szFile, LPBITMAPINFOHEADER lpbi);
  46 BOOL        wxDibSetUsage(PDIB pdib, HPALETTE hpal,UINT wUsage);
  47 PDIB        wxDibCreate(int bits, int dx, int dy);
  48 BOOL        wxDibMapToPalette(PDIB pdib, HPALETTE hpal);
  49 HPALETTE wxMakePalette(const BITMAPINFO FAR* Info, UINT flags);
  50
  51 /****************************************************************************
  52    Internal function declarations
  53  ***************************************************************************/
  54
  55 PDIB        wxDibReadBitmapInfo(HFILE fh);
  56
  57 /****************************************************************************
  58    DIB macros.
  59  ***************************************************************************/
  60
  61 #ifdef  WIN32
  62          #define wxHandleFromDib(lpbi) GlobalHandle(lpbi)
  63 #else
  64     #define wxHandleFromDib(lpbi) (HANDLE)GlobalHandle(SELECTOROF(lpbi))
  65 #endif
  66
  67 #define wxDibFromHandle(h)        (PDIB)GlobalLock(h)
  68
  69 #define wxDibFree(pdib)           GlobalFreePtr(pdib)
  70
  71 #define wxWIDTHBYTES(i)           ((unsigned)((i+31)&(~31))/8)  /* ULONG aligned ! */
  72
  73 #define wxDibWidth(lpbi)          (UINT)(((LPBITMAPINFOHEADER)(lpbi))->biWidth)
  74 #define wxDibHeight(lpbi)         (UINT)(((LPBITMAPINFOHEADER)(lpbi))->biHeight)
  75 #define wxDibBitCount(lpbi)       (UINT)(((LPBITMAPINFOHEADER)(lpbi))->biBitCount)
  76 #define wxDibCompression(lpbi)    (DWORD)(((LPBITMAPINFOHEADER)(lpbi))->biCompression)
  77
  78 #define wxDibWidthBytesN(lpbi, n) (UINT)wxWIDTHBYTES((UINT)(lpbi)->biWidth * (UINT)(n))
  79 #define wxDibWidthBytes(lpbi)     wxDibWidthBytesN(lpbi, (lpbi)->biBitCount)
  80
  81 #define wxDibSizeImage(lpbi)      ((lpbi)->biSizeImage == 0 \
  82                                     ? ((DWORD)(UINT)wxDibWidthBytes(lpbi) * (DWORD)(UINT)(lpbi)->biHeight) \
  83                                     : (lpbi)->biSizeImage)
  84
  85 #define wxDibSize(lpbi)           ((lpbi)->biSize + (lpbi)->biSizeImage + (int)(lpbi)->biClrUsed * sizeof(RGBQUAD))
  86 #define wxDibPaletteSize(lpbi)    (wxDibNumColors(lpbi) * sizeof(RGBQUAD))
  87
  88 #define wxDibFlipY(lpbi, y)       ((int)(lpbi)->biHeight-1-(y))
  89
  90 //HACK for NT BI_BITFIELDS DIBs
  91 #ifdef WIN32
  92     #define wxDibPtr(lpbi)            ((lpbi)->biCompression == BI_BITFIELDS \
  93                                        ? (LPVOID)(wxDibColors(lpbi) + 3) \
  94                                        : (LPVOID)(wxDibColors(lpbi) + (UINT)(lpbi)->biClrUsed))
  95 #else
  96          #define wxDibPtr(lpbi)            (LPVOID)(wxDibColors(lpbi) + (UINT)(lpbi)->biClrUsed)
  97 #endif
  98
  99 #define wxDibColors(lpbi)         ((RGBQUAD FAR *)((LPBYTE)(lpbi) + (int)(lpbi)->biSize))
 100
 101 #define wxDibNumColors(lpbi)      ((lpbi)->biClrUsed == 0 && (lpbi)->biBitCount <= 8 \
 102                                     ? (int)(1 << (int)(lpbi)->biBitCount)          \
 103                                     : (int)(lpbi)->biClrUsed)
 104
 105 #define wxDibXYN(lpbi,pb,x,y,n)   (LPVOID)(                                     \
 106                                 (BYTE _huge *)(pb) +                          \
 107                                 (UINT)((UINT)(x) * (UINT)(n) / 8u) +          \
 108                                 ((DWORD)wxDibWidthBytesN(lpbi,n) * (DWORD)(UINT)(y)))
 109
 110 #define wxDibXY(lpbi,x,y)         wxDibXYN(lpbi,wxDibPtr(lpbi),x,y,(lpbi)->biBitCount)
 111
 112 #define wxFixBitmapInfo(lpbi)     if ((lpbi)->biSizeImage == 0)                 \
 113                                                                                                 (lpbi)->biSizeImage = wxDibSizeImage(lpbi); \
 114                                 if ((lpbi)->biClrUsed == 0)                   \
 115                                     (lpbi)->biClrUsed = wxDibNumColors(lpbi);
 116
 117 //                                if ((lpbi)->biCompression == BI_BITFIELDS && (lpbi)->biClrUsed == 0)
 118 //                                    ; // (lpbi)->biClrUsed = 3;
 119
 120 #define wxDibInfo(pDIB)     ((BITMAPINFO FAR *)(pDIB))
 121
 122 /***************************************************************************/
 123
 124 #ifndef BI_BITFIELDS
 125   #define BI_BITFIELDS 3
 126 #endif
 127
 128 #ifndef HALFTONE
 129   #define HALFTONE COLORONCOLOR
 130 #endif
 131
 132 #endif