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 #ifndef _DIBUTILS_H
  13 #define _DIBUTILS_H
  14
  15 #ifdef __GNUG__
  16 #pragma interface "dibutils.h"
  17 #endif
  18
  19 typedef     LPBITMAPINFOHEADER PDIB;
  20 typedef     HANDLE             HDIB;
  21
  22 /***************************************************************************
  23    External function declarations
  24  **************************************************************************/
  25
  26 PDIB        wxDibOpenFile(LPTSTR szFile);
  27 int         wxDibWriteFile(LPTSTR szFile, LPBITMAPINFOHEADER lpbi);
  28 BOOL        wxDibSetUsage(PDIB pdib, HPALETTE hpal,UINT wUsage);
  29 PDIB        wxDibCreate(int bits, int dx, int dy);
  30 BOOL        wxDibMapToPalette(PDIB pdib, HPALETTE hpal);
  31 HPALETTE    wxMakePalette(const BITMAPINFO FAR* Info, UINT flags);
  32
  33 /****************************************************************************
  34    Internal function declarations
  35  ***************************************************************************/
  36
  37 PDIB        wxDibReadBitmapInfo(HFILE fh);
  38
  39 /****************************************************************************
  40    DIB macros.
  41  ***************************************************************************/
  42
  43 #ifdef  WIN32
  44          #define wxHandleFromDib(lpbi) GlobalHandle(lpbi)
  45 #else
  46     #define wxHandleFromDib(lpbi) (HANDLE)GlobalHandle(SELECTOROF(lpbi))
  47 #endif
  48
  49 #define wxDibFromHandle(h)        (PDIB)GlobalLock(h)
  50
  51 #define wxDibFree(pdib)           GlobalFreePtr(pdib)
  52
  53 #define wxWIDTHBYTES(i)           ((unsigned)((i+31)&(~31))/8)  /* ULONG aligned ! */
  54
  55 #define wxDibWidth(lpbi)          (UINT)(((LPBITMAPINFOHEADER)(lpbi))->biWidth)
  56 #define wxDibHeight(lpbi)         (UINT)(((LPBITMAPINFOHEADER)(lpbi))->biHeight)
  57 #define wxDibBitCount(lpbi)       (UINT)(((LPBITMAPINFOHEADER)(lpbi))->biBitCount)
  58 #define wxDibCompression(lpbi)    (DWORD)(((LPBITMAPINFOHEADER)(lpbi))->biCompression)
  59
  60 #define wxDibWidthBytesN(lpbi, n) (UINT)wxWIDTHBYTES((UINT)(lpbi)->biWidth * (UINT)(n))
  61 #define wxDibWidthBytes(lpbi)     wxDibWidthBytesN(lpbi, (lpbi)->biBitCount)
  62
  63 #define wxDibSizeImage(lpbi)      ((lpbi)->biSizeImage == 0 \
  64                                     ? ((DWORD)(UINT)wxDibWidthBytes(lpbi) * (DWORD)(UINT)(lpbi)->biHeight) \
  65                                     : (lpbi)->biSizeImage)
  66
  67 #define wxDibSize(lpbi)           ((lpbi)->biSize + (lpbi)->biSizeImage + (int)(lpbi)->biClrUsed * sizeof(RGBQUAD))
  68 #define wxDibPaletteSize(lpbi)    (wxDibNumColors(lpbi) * sizeof(RGBQUAD))
  69
  70 #define wxDibFlipY(lpbi, y)       ((int)(lpbi)->biHeight-1-(y))
  71
  72 //HACK for NT BI_BITFIELDS DIBs
  73 #ifdef __WIN32__
  74     #define wxDibPtr(lpbi)            ((lpbi)->biCompression == BI_BITFIELDS \
  75                                        ? (LPVOID)(wxDibColors(lpbi) + 3) \
  76                                        : (LPVOID)(wxDibColors(lpbi) + (UINT)(lpbi)->biClrUsed))
  77 #else
  78          #define wxDibPtr(lpbi)            (LPVOID)(wxDibColors(lpbi) + (UINT)(lpbi)->biClrUsed)
  79 #endif
  80
  81 #define wxDibColors(lpbi)         ((RGBQUAD FAR *)((LPBYTE)(lpbi) + (int)(lpbi)->biSize))
  82
  83 #define wxDibNumColors(lpbi)      ((lpbi)->biClrUsed == 0 && (lpbi)->biBitCount <= 8 \
  84                                     ? (int)(1 << (int)(lpbi)->biBitCount)          \
  85                                     : (int)(lpbi)->biClrUsed)
  86
  87 #define wxDibXYN(lpbi,pb,x,y,n)   (LPVOID)(                                     \
  88                                 (BYTE _huge *)(pb) +                          \
  89                                 (UINT)((UINT)(x) * (UINT)(n) / 8u) +          \
  90                                 ((DWORD)wxDibWidthBytesN(lpbi,n) * (DWORD)(UINT)(y)))
  91
  92 #define wxDibXY(lpbi,x,y)         wxDibXYN(lpbi,wxDibPtr(lpbi),x,y,(lpbi)->biBitCount)
  93
  94 #define wxFixBitmapInfo(lpbi)     if ((lpbi)->biSizeImage == 0)                 \
  95                                                                                                 (lpbi)->biSizeImage = wxDibSizeImage(lpbi); \
  96                                 if ((lpbi)->biClrUsed == 0)                   \
  97                                     (lpbi)->biClrUsed = wxDibNumColors(lpbi);
  98
  99 //                                if ((lpbi)->biCompression == BI_BITFIELDS && (lpbi)->biClrUsed == 0)
 100 //                                    ; // (lpbi)->biClrUsed = 3;
 101
 102 #define wxDibInfo(pDIB)     ((BITMAPINFO FAR *)(pDIB))
 103
 104 /***************************************************************************/
 105
 106 #ifndef BI_BITFIELDS
 107   #define BI_BITFIELDS 3
 108 #endif
 109
 110 #ifndef HALFTONE
 111   #define HALFTONE COLORONCOLOR
 112 #endif
 113
 114 #endif
 115     // _DIBUTILS_H