src/msw/dibutils.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        dibutils.cpp
// Purpose:     Utilities for DIBs
// Author:      Julian Smart
// Modified by:
// Created:     04/01/98
// RCS-ID:      $Id$
// Copyright:   (c) Microsoft, Julian Smart and Markus Holzem
// Licence:     wxWindows license
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation "dibutils.h"
#endif

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#ifndef WX_PRECOMP
#include "wx/setup.h"
#include "wx/defs.h"
#include "wx/string.h"
#endif

#include <windows.h>
#include <windowsx.h>
#include <stdio.h>

#include "wx/msw/dibutils.h"

#ifdef __WXWINE__
  #include <module.h>
#endif

#if defined(__WIN32__)
#if !defined(__MWERKS__) && !defined(__SALFORDC__)
    #include <memory.h>             // for _fmemcpy()
#endif
   #define _huge
#ifndef hmemcpy
    #define hmemcpy memcpy
#endif
#endif

#define BFT_ICON   0x4349   /* 'IC' */
#define BFT_BITMAP 0x4d42   /* 'BM' */
#define BFT_CURSOR 0x5450   /* 'PT(' */

#ifndef SEEK_CUR
/* flags for _lseek */
#define  SEEK_CUR 1
#define  SEEK_END 2
#define  SEEK_SET 0
#endif

/* Copied from PNGhandler for coompilation with MingW32, RR */

#ifndef GlobalAllocPtr
#define     GlobalPtrHandle(lp)         \
                ((HGLOBAL)GlobalHandle(lp))

#define     GlobalLockPtr(lp)                \
                ((BOOL)GlobalLock(GlobalPtrHandle(lp)))
#define     GlobalUnlockPtr(lp)      \
                GlobalUnlock(GlobalPtrHandle(lp))

#define     GlobalAllocPtr(flags, cb)        \
                (GlobalLock(GlobalAlloc((flags), (cb))))
#define     GlobalReAllocPtr(lp, cbNew, flags)       \
                (GlobalUnlockPtr(lp), GlobalLock(GlobalReAlloc(GlobalPtrHandle(lp) , (cbNew), (flags))))
#define     GlobalFreePtr(lp)                \
                (GlobalUnlockPtr(lp), (BOOL)GlobalFree(GlobalPtrHandle(lp)))
#endif


/*
 *  Clear the System Palette so that we can ensure an identity palette
 *  mapping for fast performance.
 */

void wxClearSystemPalette(void)
{
  //*** A dummy palette setup
  struct
  {
    WORD Version;
    WORD NumberOfEntries;
    PALETTEENTRY aEntries[256];
  } Palette =
  {
    0x300,
    256
  };

  HPALETTE ScreenPalette = 0;
  HDC ScreenDC;
  int Counter;
  UINT nMapped = 0;
  BOOL bOK = FALSE;
  int  nOK = 0;

  // *** Reset everything in the system palette to black
  for(Counter = 0; Counter < 256; Counter++)
  {
    Palette.aEntries[Counter].peRed = 0;
   Palette.aEntries[Counter].peGreen = 0;
    Palette.aEntries[Counter].peBlue = 0;
    Palette.aEntries[Counter].peFlags = PC_NOCOLLAPSE;
  }

  // *** Create, select, realize, deselect, and delete the palette
#ifdef __WXWINE__
  ScreenDC = GetDC((HWND)NULL);
#else
  ScreenDC = GetDC(NULL);
#endif
  ScreenPalette = CreatePalette((LOGPALETTE *)&Palette);

  if (ScreenPalette)
  {
   ScreenPalette = SelectPalette(ScreenDC,ScreenPalette,FALSE);
   nMapped = RealizePalette(ScreenDC);
    ScreenPalette = SelectPalette(ScreenDC,ScreenPalette,FALSE);
    bOK = DeleteObject(ScreenPalette);
  }

#ifdef __WXWINE__
  nOK = ReleaseDC((HWND)NULL, ScreenDC);
#else
  nOK = ReleaseDC(NULL, ScreenDC);
#endif

  return;
}


/*
 *   Open a DIB file and return a MEMORY DIB, a memory handle containing..
 *
 *   BITMAP INFO    bi
 *   palette data
 *   bits....
 */

int wxDibWriteFile(LPTSTR szFile, LPBITMAPINFOHEADER lpbi)
{
   HFILE               fh;
   OFSTRUCT            of;

   fh = OpenFile(wxConvFile.cWX2MB(szFile), &of, OF_WRITE | OF_CREATE);

  if (!fh) {
//   printf("la regamos0");
   return 0;
  }

  long size = wxDibSize(lpbi);

  // write file header
  BITMAPFILEHEADER bmf;
  bmf.bfType = BFT_BITMAP;
  bmf.bfSize = sizeof(bmf) + size;
  bmf.bfReserved1 = 0;
  bmf.bfReserved2 = 0;
  bmf.bfOffBits = sizeof(bmf) + (char FAR*)(wxDibPtr(lpbi)) - (char FAR*)lpbi;
#if 1 // defined( __WATCOMC__) || defined(__VISUALC__) || defined(__SC__) || defined(__SALFORDC__) || defined(__MWERKS__) || wxUSE_NORLANDER_HEADERS
  #define HWRITE_2ND_ARG_TYPE   LPCSTR
#else // don't know who needs this...
  #define HWRITE_2ND_ARG_TYPE   LPBYTE
#endif

  if ( _hwrite(fh, (HWRITE_2ND_ARG_TYPE)(&bmf), sizeof(bmf)) < 0 ||
       _hwrite(fh, (HWRITE_2ND_ARG_TYPE)lpbi, size) < 0 )
  {
    _lclose(fh);
    return 0;
  }

#undef HWRITE_2ND_ARG_TYPE

  _lclose(fh);
  return 1;
}

PDIB wxDibOpenFile(LPTSTR szFile)
{
   HFILE               fh;
   DWORD               dwLen;
   DWORD               dwBits;
   PDIB                pdib;
   LPVOID              p;
   OFSTRUCT            of;

#if defined(WIN32) || defined(_WIN32)
   #define GetCurrentInstance()    GetModuleHandle(NULL)
#else
   #define GetCurrentInstance()    (HINSTANCE)SELECTOROF((LPVOID)&of)
#endif

   fh = OpenFile(wxConvFile.cWX2MB(szFile), &of, OF_READ);

   if (fh == -1)
   {
      HRSRC h;

          // TODO: Unicode version
#ifdef __WIN16__
      h = FindResource(GetCurrentInstance(), szFile, RT_BITMAP);
#elif wxUSE_UNICODE
      h = FindResourceW(GetCurrentInstance(), szFile, RT_BITMAP);
#else
      h = FindResourceA(GetCurrentInstance(), szFile, RT_BITMAP);
#endif

#if defined(__WIN32__)
      //!!! can we call GlobalFree() on this? is it the right format.
      //!!! can we write to this resource?
      if (h)
        return (PDIB)LockResource(LoadResource(GetCurrentInstance(), h));
#else
      if (h)
        fh = AccessResource(GetCurrentInstance(), h);
#endif
   }

   if (fh == -1)
      return NULL;

   pdib = wxDibReadBitmapInfo(fh);

   if (!pdib)
      return NULL;

    /* How much memory do we need to hold the DIB */

    dwBits = pdib->biSizeImage;
    dwLen  = pdib->biSize + wxDibPaletteSize(pdib) + dwBits;

    /* Can we get more memory? */

   p = GlobalReAllocPtr(pdib,dwLen,0);

    if (!p)
    {
      GlobalFreePtr(pdib);
        pdib = NULL;
    }
    else
    {
        pdib = (PDIB)p;
    }

    if (pdib)
    {
      /* read in the bits */
      _hread(fh, (LPBYTE)pdib + (UINT)pdib->biSize + wxDibPaletteSize(pdib), dwBits);
    }

    _lclose(fh);

    return pdib;
}


/*
 *  ReadDibBitmapInfo()
 *
 *  Will read a file in DIB format and return a global HANDLE to its
 *  BITMAPINFO.  This function will work with both "old" and "new"
 *  bitmap formats, but will always return a "new" BITMAPINFO.
 */

PDIB wxDibReadBitmapInfo(HFILE fh)
{
    DWORD     off;
    int       size;
    int       i;
    int       nNumColors;

    RGBQUAD FAR       *pRgb;
    BITMAPINFOHEADER   bi;
    BITMAPCOREHEADER   bc;
    BITMAPFILEHEADER   bf;
    PDIB               pdib;

    if (fh == -1)
        return NULL;

    off = _llseek(fh,0L,SEEK_CUR);

    if (sizeof(bf) != _lread(fh,(LPSTR)&bf,sizeof(bf)))
        return NULL;

    /*
     *  do we have a RC HEADER?
     */
    if (bf.bfType != BFT_BITMAP)
    {
        bf.bfOffBits = 0L;
        _llseek(fh,off,SEEK_SET);
    }

    if (sizeof(bi) != _lread(fh,(LPSTR)&bi,sizeof(bi)))
        return NULL;

    /*
     *  what type of bitmap info is this?
     */
    switch (size = (int)bi.biSize)
    {
        default:
        case sizeof(BITMAPINFOHEADER):
            break;

        case sizeof(BITMAPCOREHEADER):
            bc = *(BITMAPCOREHEADER*)&bi;
            bi.biSize               = sizeof(BITMAPINFOHEADER);
            bi.biWidth              = (DWORD)bc.bcWidth;
            bi.biHeight             = (DWORD)bc.bcHeight;
            bi.biPlanes             = (WORD)bc.bcPlanes;
            bi.biBitCount           = (WORD)bc.bcBitCount;
            bi.biCompression        = BI_RGB;
            bi.biSizeImage          = 0;
            bi.biXPelsPerMeter      = 0;
            bi.biYPelsPerMeter      = 0;
            bi.biClrUsed            = 0;
            bi.biClrImportant       = 0;

            _llseek(fh,(LONG)sizeof(BITMAPCOREHEADER)-sizeof(BITMAPINFOHEADER),SEEK_CUR);

            break;
    }

    nNumColors = wxDibNumColors(&bi);

#if 0
    if (bi.biSizeImage == 0)
        bi.biSizeImage = DibSizeImage(&bi);

    if (bi.biClrUsed == 0)
        bi.biClrUsed = wxDibNumColors(&bi);
#else
    wxFixBitmapInfo(&bi);
#endif

    pdib = (PDIB)GlobalAllocPtr(GMEM_MOVEABLE,(LONG)bi.biSize + nNumColors * sizeof(RGBQUAD));

    if (!pdib)
        return NULL;

    *pdib = bi;

    pRgb = wxDibColors(pdib);

    if (nNumColors)
    {
        if (size == sizeof(BITMAPCOREHEADER))
        {
            /*
             * convert a old color table (3 byte entries) to a new
             * color table (4 byte entries)
             */
            _lread(fh,(LPVOID)pRgb,nNumColors * sizeof(RGBTRIPLE));

            for (i=nNumColors-1; i>=0; i--)
            {
                RGBQUAD rgb;

                rgb.rgbRed      = ((RGBTRIPLE FAR *)pRgb)[i].rgbtRed;
                rgb.rgbBlue     = ((RGBTRIPLE FAR *)pRgb)[i].rgbtBlue;
                rgb.rgbGreen    = ((RGBTRIPLE FAR *)pRgb)[i].rgbtGreen;
                rgb.rgbReserved = (BYTE)0;

                pRgb[i] = rgb;
            }
        }
        else
        {
            _lread(fh,(LPVOID)pRgb,nNumColors * sizeof(RGBQUAD));
        }
    }

    if (bf.bfOffBits != 0L)
        _llseek(fh,off + bf.bfOffBits,SEEK_SET);

    return pdib;
}

/*
 *  DibSetUsage(hdib,hpal,wUsage)
 *
 *  Modifies the color table of the passed DIB for use with the wUsage
 *  parameter specifed.
 *
 *  if wUsage is DIB_PAL_COLORS the DIB color table is set to 0-256
 *  if wUsage is DIB_RGB_COLORS the DIB color table is set to the RGB values
 *      in the passed palette
 */

BOOL wxDibSetUsage(PDIB pdib, HPALETTE hpal,UINT wUsage)
{
    PALETTEENTRY       ape[256];
    RGBQUAD FAR *      pRgb;
    WORD FAR *         pw;
    int                nColors;
    int                n;

    if (hpal == NULL)
        hpal = (HPALETTE)GetStockObject(DEFAULT_PALETTE);

    if (!pdib)
        return FALSE;

    nColors = wxDibNumColors(pdib);

    if (nColors == 3 && wxDibCompression(pdib) == BI_BITFIELDS)
        nColors = 0;

    if (nColors > 0)
    {
        pRgb = wxDibColors(pdib);

        switch (wUsage)
        {
            //
            // Set the DIB color table to palette indexes
            //
            case DIB_PAL_COLORS:
                for (pw = (WORD FAR*)pRgb,n=0; n<nColors; n++,pw++)
                    *pw = n;
                break;

            //
            // Set the DIB color table to RGBQUADS
            //
            default:
            case DIB_RGB_COLORS:
                nColors =  (nColors < 256) ? nColors: 256;

                GetPaletteEntries(hpal,0,nColors,ape);

                for (n=0; n<nColors; n++)
                {
                    pRgb[n].rgbRed      = ape[n].peRed;
                    pRgb[n].rgbGreen    = ape[n].peGreen;
                    pRgb[n].rgbBlue     = ape[n].peBlue;
                    pRgb[n].rgbReserved = 0;
                }
                break;
        }
    }
    return TRUE;
}

/*
 *  DibCreate(bits, dx, dy)
 *
 *  Creates a new packed DIB with the given dimensions and the
 *  given number of bits per pixel
 */

PDIB wxDibCreate(int bits, int dx, int dy)
{
    LPBITMAPINFOHEADER lpbi ;
    DWORD       dwSizeImage;
    int         i;
    DWORD FAR  *pdw;

    dwSizeImage = dy*(DWORD)((dx*bits/8+3)&~3);

    lpbi = (PDIB)GlobalAllocPtr(GHND,sizeof(BITMAPINFOHEADER)+dwSizeImage + 1024);

    if (lpbi == NULL)
        return NULL;

    lpbi->biSize            = sizeof(BITMAPINFOHEADER) ;
    lpbi->biWidth           = dx;
    lpbi->biHeight          = dy;
    lpbi->biPlanes          = 1;
    lpbi->biBitCount        = bits ;
    lpbi->biCompression     = BI_RGB ;
    lpbi->biSizeImage       = dwSizeImage;
    lpbi->biXPelsPerMeter   = 0 ;
    lpbi->biYPelsPerMeter   = 0 ;
    lpbi->biClrUsed         = 0 ;
    lpbi->biClrImportant    = 0 ;

    if (bits == 4)
        lpbi->biClrUsed = 16;

    else if (bits == 8)
        lpbi->biClrUsed = 256;

    pdw = (DWORD FAR *)((LPBYTE)lpbi+(int)lpbi->biSize);

    for (i=0; i<(int)lpbi->biClrUsed/16; i++)
    {
        *pdw++ = 0x00000000;    // 0000  black
        *pdw++ = 0x00800000;    // 0001  dark red
        *pdw++ = 0x00008000;    // 0010  dark green
      *pdw++ = 0x00808000;    // 0011  mustard
        *pdw++ = 0x00000080;    // 0100  dark blue
        *pdw++ = 0x00800080;    // 0101  purple
        *pdw++ = 0x00008080;    // 0110  dark turquoise
        *pdw++ = 0x00C0C0C0;    // 1000  gray
        *pdw++ = 0x00808080;    // 0111  dark gray
        *pdw++ = 0x00FF0000;    // 1001  red
        *pdw++ = 0x0000FF00;    // 1010  green
      *pdw++ = 0x00FFFF00;    // 1011  yellow
        *pdw++ = 0x000000FF;    // 1100  blue
        *pdw++ = 0x00FF00FF;    // 1101  pink (magenta)
        *pdw++ = 0x0000FFFF;    // 1110  cyan
        *pdw++ = 0x00FFFFFF;    // 1111  white
    }

    return (PDIB)lpbi;
}

static void xlatClut8(BYTE FAR *pb, DWORD dwSize, BYTE FAR *xlat)
{
    DWORD dw;

#ifdef __cplusplus
    for (dw = 0; dw < dwSize; dw++, ((BYTE _huge *&)pb)++)
#else
    for (dw = 0; dw < dwSize; dw++, ((BYTE _huge *)pb)++)
#endif
        *pb = xlat[*pb];
}

static void xlatClut4(BYTE FAR *pb, DWORD dwSize, BYTE FAR *xlat)
{
    DWORD dw;

#ifdef __cplusplus
    for (dw = 0; dw < dwSize; dw++, ((BYTE _huge *&)pb)++)
#else
    for (dw = 0; dw < dwSize; dw++, ((BYTE _huge *)pb)++)
#endif
        *pb = (BYTE)(xlat[*pb & 0x0F] | (xlat[(*pb >> 4) & 0x0F] << 4));
}

#define RLE_ESCAPE  0
#define RLE_EOL     0
#define RLE_EOF     1
#define RLE_JMP     2

static void xlatRle8(BYTE FAR *pb, DWORD WXUNUSED(dwSize), BYTE FAR *xlat)
{
    BYTE    cnt;
    BYTE    b;
    BYTE _huge *prle = pb;

    for(;;)
    {
        cnt = *prle++;
        b   = *prle;

        if (cnt == RLE_ESCAPE)
        {
            prle++;

            switch (b)
            {
                case RLE_EOF:
                    return;

                case RLE_EOL:
                    break;

                case RLE_JMP:
                    prle++;     // skip dX
                    prle++;     // skip dY
                    break;

                default:
                    cnt = b;
                    for (b=0; b<cnt; b++,prle++)
                        *prle = xlat[*prle];

                    if (cnt & 1)
                        prle++;

                    break;
            }
        }
        else
        {
            *prle++ = xlat[b];
        }
    }
}

static void xlatRle4(BYTE FAR *WXUNUSED(pb), DWORD WXUNUSED(dwSize), BYTE FAR *WXUNUSED(xlat))
{
}

static void hmemmove(BYTE _huge *d, BYTE _huge *s, LONG len)
{
    d += len-1;
    s += len-1;

    while (len--)
        *d-- = *s--;
}

/*
 *  DibMapToPalette(pdib, hpal)
 *
 *  Map the colors of the DIB, using GetNearestPaletteIndex, to
 *  the colors of the given palette.
 */

BOOL wxDibMapToPalette(PDIB pdib, HPALETTE hpal)
{
   LPBITMAPINFOHEADER  lpbi;
   PALETTEENTRY        pe;
   int                 n;
   int                 nDibColors;
   int                 nPalColors=0;
   BYTE FAR *          lpBits;
   RGBQUAD FAR *       lpRgb;
   BYTE                xlat[256];
   DWORD               SizeImage;

   if (!hpal || !pdib)
      return FALSE;

   lpbi   = (LPBITMAPINFOHEADER)pdib;
   lpRgb  = wxDibColors(pdib);

   GetObject(hpal,sizeof(int),(LPSTR)&nPalColors);
   nDibColors = wxDibNumColors(pdib);

   if ((SizeImage = lpbi->biSizeImage) == 0)
      SizeImage = wxDibSizeImage(lpbi);

   //
   //  build a xlat table. from the current DIB colors to the given
   //  palette.
   //
   for (n=0; n<nDibColors; n++)
      xlat[n] = (BYTE)GetNearestPaletteIndex(hpal,RGB(lpRgb[n].rgbRed,lpRgb[n].rgbGreen,lpRgb[n].rgbBlue));

   lpBits = (LPBYTE)wxDibPtr(lpbi);
   lpbi->biClrUsed = nPalColors;

   //
   // re-size the DIB
   //
   if (nPalColors > nDibColors)
   {
      GlobalReAllocPtr(lpbi, lpbi->biSize + nPalColors*sizeof(RGBQUAD) + SizeImage, 0);
      hmemmove((BYTE _huge *)wxDibPtr(lpbi), (BYTE _huge *)lpBits, SizeImage);
      lpBits = (LPBYTE)wxDibPtr(lpbi);
   }
   else if (nPalColors < nDibColors)
   {
      hmemcpy(wxDibPtr(lpbi), lpBits, SizeImage);
      GlobalReAllocPtr(lpbi, lpbi->biSize + nPalColors*sizeof(RGBQUAD) + SizeImage, 0);
      lpBits = (LPBYTE)wxDibPtr(lpbi);
   }

   //
   // translate the DIB bits
   //
   switch (lpbi->biCompression)
   {
      case BI_RLE8:
        xlatRle8(lpBits, SizeImage, xlat);
        break;

      case BI_RLE4:
        xlatRle4(lpBits, SizeImage, xlat);
        break;

        case BI_RGB:
        if (lpbi->biBitCount == 8)
                xlatClut8(lpBits, SizeImage, xlat);
            else
                xlatClut4(lpBits, SizeImage, xlat);
            break;
    }

    //
    //  Now copy the RGBs in the logical palette to the dib color table
    //
    for (n=0; n<nPalColors; n++)
    {
        GetPaletteEntries(hpal,n,1,&pe);

        lpRgb[n].rgbRed      = pe.peRed;
      lpRgb[n].rgbGreen    = pe.peGreen;
      lpRgb[n].rgbBlue     = pe.peBlue;
      lpRgb[n].rgbReserved = (BYTE)0;
   }

   return TRUE;
}


HPALETTE wxMakePalette(const BITMAPINFO FAR* Info, UINT flags)
{
  HPALETTE hPalette;
  const RGBQUAD FAR* rgb = Info->bmiColors;

  WORD nColors = (WORD)Info->bmiHeader.biClrUsed;
  if (nColors) {
   LOGPALETTE* logPal = (LOGPALETTE*)
     new BYTE[sizeof(LOGPALETTE) + (nColors-1)*sizeof(PALETTEENTRY)];

   logPal->palVersion  = 0x300; // Windows 3.0 version
   logPal->palNumEntries = nColors;
   for (WORD n = 0; n < nColors; n++) {
    logPal->palPalEntry[n].peRed   = rgb[n].rgbRed;
    logPal->palPalEntry[n].peGreen = rgb[n].rgbGreen;
    logPal->palPalEntry[n].peBlue  = rgb[n].rgbBlue;
    logPal->palPalEntry[n].peFlags = (BYTE)flags;
   }
   hPalette = ::CreatePalette(logPal);
   delete logPal;
  } else
   hPalette = 0;

  return hPalette;
}
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: dibutils.cpp
	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 and Markus Holzem
	9	// Licence: wxWindows license
	10	/////////////////////////////////////////////////////////////////////////////
	11
	12	#ifdef __GNUG__
	13	#pragma implementation "dibutils.h"
	14	#endif
	15
	16	// For compilers that support precompilation, includes "wx.h".
	17	#include "wx/wxprec.h"
	18
	19	#ifdef __BORLANDC__
	20	#pragma hdrstop
	21	#endif
	22
	23	#ifndef WX_PRECOMP
	24	#include "wx/setup.h"
	25	#include "wx/defs.h"
	26	#include "wx/string.h"
	27	#endif
	28
	29	#include <windows.h>
	30	#include <windowsx.h>
	31	#include <stdio.h>
	32
	33	#include "wx/msw/dibutils.h"
	34
	35	#ifdef __WXWINE__
	36	#include <module.h>
	37	#endif
	38
	39	#if defined(__WIN32__)
	40	#if !defined(__MWERKS__) && !defined(__SALFORDC__)
	41	#include <memory.h> // for _fmemcpy()
	42	#endif
	43	#define _huge
	44	#ifndef hmemcpy
	45	#define hmemcpy memcpy
	46	#endif
	47	#endif
	48
	49	#define BFT_ICON 0x4349 /* 'IC' */
	50	#define BFT_BITMAP 0x4d42 /* 'BM' */
	51	#define BFT_CURSOR 0x5450 /* 'PT(' */
	52
	53	#ifndef SEEK_CUR
	54	/* flags for _lseek */
	55	#define SEEK_CUR 1
	56	#define SEEK_END 2
	57	#define SEEK_SET 0
	58	#endif
	59
	60	/* Copied from PNGhandler for coompilation with MingW32, RR */
	61
	62	#ifndef GlobalAllocPtr
	63	#define GlobalPtrHandle(lp) \
	64	((HGLOBAL)GlobalHandle(lp))
	65
	66	#define GlobalLockPtr(lp) \
	67	((BOOL)GlobalLock(GlobalPtrHandle(lp)))
	68	#define GlobalUnlockPtr(lp) \
	69	GlobalUnlock(GlobalPtrHandle(lp))
	70
	71	#define GlobalAllocPtr(flags, cb) \
	72	(GlobalLock(GlobalAlloc((flags), (cb))))
	73	#define GlobalReAllocPtr(lp, cbNew, flags) \
	74	(GlobalUnlockPtr(lp), GlobalLock(GlobalReAlloc(GlobalPtrHandle(lp) , (cbNew), (flags))))
	75	#define GlobalFreePtr(lp) \
	76	(GlobalUnlockPtr(lp), (BOOL)GlobalFree(GlobalPtrHandle(lp)))
	77	#endif
	78
	79
	80	/*
	81	* Clear the System Palette so that we can ensure an identity palette
	82	* mapping for fast performance.
	83	*/
	84
	85	void wxClearSystemPalette(void)
	86	{
	87	//*** A dummy palette setup
	88	struct
	89	{
	90	WORD Version;
	91	WORD NumberOfEntries;
	92	PALETTEENTRY aEntries[256];
	93	} Palette =
	94	{
	95	0x300,
	96	256
	97	};
	98
	99	HPALETTE ScreenPalette = 0;
	100	HDC ScreenDC;
	101	int Counter;
	102	UINT nMapped = 0;
	103	BOOL bOK = FALSE;
	104	int nOK = 0;
	105
	106	// *** Reset everything in the system palette to black
	107	for(Counter = 0; Counter < 256; Counter++)
	108	{
	109	Palette.aEntries[Counter].peRed = 0;
	110	Palette.aEntries[Counter].peGreen = 0;
	111	Palette.aEntries[Counter].peBlue = 0;
	112	Palette.aEntries[Counter].peFlags = PC_NOCOLLAPSE;
	113	}
	114
	115	// *** Create, select, realize, deselect, and delete the palette
	116	#ifdef __WXWINE__
	117	ScreenDC = GetDC((HWND)NULL);
	118	#else
	119	ScreenDC = GetDC(NULL);
	120	#endif
	121	ScreenPalette = CreatePalette((LOGPALETTE *)&Palette);
	122
	123	if (ScreenPalette)
	124	{
	125	ScreenPalette = SelectPalette(ScreenDC,ScreenPalette,FALSE);
	126	nMapped = RealizePalette(ScreenDC);
	127	ScreenPalette = SelectPalette(ScreenDC,ScreenPalette,FALSE);
	128	bOK = DeleteObject(ScreenPalette);
	129	}
	130
	131	#ifdef __WXWINE__
	132	nOK = ReleaseDC((HWND)NULL, ScreenDC);
	133	#else
	134	nOK = ReleaseDC(NULL, ScreenDC);
	135	#endif
	136
	137	return;
	138	}
	139
	140
	141	/*
	142	* Open a DIB file and return a MEMORY DIB, a memory handle containing..
	143	*
	144	* BITMAP INFO bi
	145	* palette data
	146	* bits....
	147	*/
	148
	149	int wxDibWriteFile(LPTSTR szFile, LPBITMAPINFOHEADER lpbi)
	150	{
	151	HFILE fh;
	152	OFSTRUCT of;
	153
	154	fh = OpenFile(wxConvFile.cWX2MB(szFile), &of, OF_WRITE \| OF_CREATE);
	155
	156	if (!fh) {
	157	// printf("la regamos0");
	158	return 0;
	159	}
	160
	161	long size = wxDibSize(lpbi);
	162
	163	// write file header
	164	BITMAPFILEHEADER bmf;
	165	bmf.bfType = BFT_BITMAP;
	166	bmf.bfSize = sizeof(bmf) + size;
	167	bmf.bfReserved1 = 0;
	168	bmf.bfReserved2 = 0;
	169	bmf.bfOffBits = sizeof(bmf) + (char FAR)(wxDibPtr(lpbi)) - (char FAR)lpbi;
	170	#if 1 // defined( __WATCOMC__) \|\| defined(__VISUALC__) \|\| defined(__SC__) \|\| defined(__SALFORDC__) \|\| defined(__MWERKS__) \|\| wxUSE_NORLANDER_HEADERS
	171	#define HWRITE_2ND_ARG_TYPE LPCSTR
	172	#else // don't know who needs this...
	173	#define HWRITE_2ND_ARG_TYPE LPBYTE
	174	#endif
	175
	176	if ( _hwrite(fh, (HWRITE_2ND_ARG_TYPE)(&bmf), sizeof(bmf)) < 0 \|\|
	177	_hwrite(fh, (HWRITE_2ND_ARG_TYPE)lpbi, size) < 0 )
	178	{
	179	_lclose(fh);
	180	return 0;
	181	}
	182
	183	#undef HWRITE_2ND_ARG_TYPE
	184
	185	_lclose(fh);
	186	return 1;
	187	}
	188
	189	PDIB wxDibOpenFile(LPTSTR szFile)
	190	{
	191	HFILE fh;
	192	DWORD dwLen;
	193	DWORD dwBits;
	194	PDIB pdib;
	195	LPVOID p;
	196	OFSTRUCT of;
	197
	198	#if defined(WIN32) \|\| defined(_WIN32)
	199	#define GetCurrentInstance() GetModuleHandle(NULL)
	200	#else
	201	#define GetCurrentInstance() (HINSTANCE)SELECTOROF((LPVOID)&of)
	202	#endif
	203
	204	fh = OpenFile(wxConvFile.cWX2MB(szFile), &of, OF_READ);
	205
	206	if (fh == -1)
	207	{
	208	HRSRC h;
	209
	210	// TODO: Unicode version
	211	#ifdef __WIN16__
	212	h = FindResource(GetCurrentInstance(), szFile, RT_BITMAP);
	213	#elif wxUSE_UNICODE
	214	h = FindResourceW(GetCurrentInstance(), szFile, RT_BITMAP);
	215	#else
	216	h = FindResourceA(GetCurrentInstance(), szFile, RT_BITMAP);
	217	#endif
	218
	219	#if defined(__WIN32__)
	220	//!!! can we call GlobalFree() on this? is it the right format.
	221	//!!! can we write to this resource?
	222	if (h)
	223	return (PDIB)LockResource(LoadResource(GetCurrentInstance(), h));
	224	#else
	225	if (h)
	226	fh = AccessResource(GetCurrentInstance(), h);
	227	#endif
	228	}
	229
	230	if (fh == -1)
	231	return NULL;
	232
	233	pdib = wxDibReadBitmapInfo(fh);
	234
	235	if (!pdib)
	236	return NULL;
	237
	238	/* How much memory do we need to hold the DIB */
	239
	240	dwBits = pdib->biSizeImage;
	241	dwLen = pdib->biSize + wxDibPaletteSize(pdib) + dwBits;
	242
	243	/* Can we get more memory? */
	244
	245	p = GlobalReAllocPtr(pdib,dwLen,0);
	246
	247	if (!p)
	248	{
	249	GlobalFreePtr(pdib);
	250	pdib = NULL;
	251	}
	252	else
	253	{
	254	pdib = (PDIB)p;
	255	}
	256
	257	if (pdib)
	258	{
	259	/* read in the bits */
	260	_hread(fh, (LPBYTE)pdib + (UINT)pdib->biSize + wxDibPaletteSize(pdib), dwBits);
	261	}
	262
	263	_lclose(fh);
	264
	265	return pdib;
	266	}
	267
	268
	269	/*
	270	* ReadDibBitmapInfo()
	271	*
	272	* Will read a file in DIB format and return a global HANDLE to its
	273	* BITMAPINFO. This function will work with both "old" and "new"
	274	* bitmap formats, but will always return a "new" BITMAPINFO.
	275	*/
	276
	277	PDIB wxDibReadBitmapInfo(HFILE fh)
	278	{
	279	DWORD off;
	280	int size;
	281	int i;
	282	int nNumColors;
	283
	284	RGBQUAD FAR *pRgb;
	285	BITMAPINFOHEADER bi;
	286	BITMAPCOREHEADER bc;
	287	BITMAPFILEHEADER bf;
	288	PDIB pdib;
	289
	290	if (fh == -1)
	291	return NULL;
	292
	293	off = _llseek(fh,0L,SEEK_CUR);
	294
	295	if (sizeof(bf) != _lread(fh,(LPSTR)&bf,sizeof(bf)))
	296	return NULL;
	297
	298	/*
	299	* do we have a RC HEADER?
	300	*/
	301	if (bf.bfType != BFT_BITMAP)
	302	{
	303	bf.bfOffBits = 0L;
	304	_llseek(fh,off,SEEK_SET);
	305	}
	306
	307	if (sizeof(bi) != _lread(fh,(LPSTR)&bi,sizeof(bi)))
	308	return NULL;
	309
	310	/*
	311	* what type of bitmap info is this?
	312	*/
	313	switch (size = (int)bi.biSize)
	314	{
	315	default:
	316	case sizeof(BITMAPINFOHEADER):
	317	break;
	318
	319	case sizeof(BITMAPCOREHEADER):
	320	bc = (BITMAPCOREHEADER)&bi;
	321	bi.biSize = sizeof(BITMAPINFOHEADER);
	322	bi.biWidth = (DWORD)bc.bcWidth;
	323	bi.biHeight = (DWORD)bc.bcHeight;
	324	bi.biPlanes = (WORD)bc.bcPlanes;
	325	bi.biBitCount = (WORD)bc.bcBitCount;
	326	bi.biCompression = BI_RGB;
	327	bi.biSizeImage = 0;
	328	bi.biXPelsPerMeter = 0;
	329	bi.biYPelsPerMeter = 0;
	330	bi.biClrUsed = 0;
	331	bi.biClrImportant = 0;
	332
	333	_llseek(fh,(LONG)sizeof(BITMAPCOREHEADER)-sizeof(BITMAPINFOHEADER),SEEK_CUR);
	334
	335	break;
	336	}
	337
	338	nNumColors = wxDibNumColors(&bi);
	339
	340	#if 0
	341	if (bi.biSizeImage == 0)
	342	bi.biSizeImage = DibSizeImage(&bi);
	343
	344	if (bi.biClrUsed == 0)
	345	bi.biClrUsed = wxDibNumColors(&bi);
	346	#else
	347	wxFixBitmapInfo(&bi);
	348	#endif
	349
	350	pdib = (PDIB)GlobalAllocPtr(GMEM_MOVEABLE,(LONG)bi.biSize + nNumColors * sizeof(RGBQUAD));
	351
	352	if (!pdib)
	353	return NULL;
	354
	355	*pdib = bi;
	356
	357	pRgb = wxDibColors(pdib);
	358
	359	if (nNumColors)
	360	{
	361	if (size == sizeof(BITMAPCOREHEADER))
	362	{
	363	/*
	364	* convert a old color table (3 byte entries) to a new
	365	* color table (4 byte entries)
	366	*/
	367	_lread(fh,(LPVOID)pRgb,nNumColors * sizeof(RGBTRIPLE));
	368
	369	for (i=nNumColors-1; i>=0; i--)
	370	{
	371	RGBQUAD rgb;
	372
	373	rgb.rgbRed = ((RGBTRIPLE FAR *)pRgb)[i].rgbtRed;
	374	rgb.rgbBlue = ((RGBTRIPLE FAR *)pRgb)[i].rgbtBlue;
	375	rgb.rgbGreen = ((RGBTRIPLE FAR *)pRgb)[i].rgbtGreen;
	376	rgb.rgbReserved = (BYTE)0;
	377
	378	pRgb[i] = rgb;
	379	}
	380	}
	381	else
	382	{
	383	_lread(fh,(LPVOID)pRgb,nNumColors * sizeof(RGBQUAD));
	384	}
	385	}
	386
	387	if (bf.bfOffBits != 0L)
	388	_llseek(fh,off + bf.bfOffBits,SEEK_SET);
	389
	390	return pdib;
	391	}
	392
	393	/*
	394	* DibSetUsage(hdib,hpal,wUsage)
	395	*
	396	* Modifies the color table of the passed DIB for use with the wUsage
	397	* parameter specifed.
	398	*
	399	* if wUsage is DIB_PAL_COLORS the DIB color table is set to 0-256
	400	* if wUsage is DIB_RGB_COLORS the DIB color table is set to the RGB values
	401	* in the passed palette
	402	*/
	403
	404	BOOL wxDibSetUsage(PDIB pdib, HPALETTE hpal,UINT wUsage)
	405	{
	406	PALETTEENTRY ape[256];
	407	RGBQUAD FAR * pRgb;
	408	WORD FAR * pw;
	409	int nColors;
	410	int n;
	411
	412	if (hpal == NULL)
	413	hpal = (HPALETTE)GetStockObject(DEFAULT_PALETTE);
	414
	415	if (!pdib)
	416	return FALSE;
	417
	418	nColors = wxDibNumColors(pdib);
	419
	420	if (nColors == 3 && wxDibCompression(pdib) == BI_BITFIELDS)
	421	nColors = 0;
	422
	423	if (nColors > 0)
	424	{
	425	pRgb = wxDibColors(pdib);
	426
	427	switch (wUsage)
	428	{
	429	//
	430	// Set the DIB color table to palette indexes
	431	//
	432	case DIB_PAL_COLORS:
	433	for (pw = (WORD FAR*)pRgb,n=0; n<nColors; n++,pw++)
	434	*pw = n;
	435	break;
	436
	437	//
	438	// Set the DIB color table to RGBQUADS
	439	//
	440	default:
	441	case DIB_RGB_COLORS:
	442	nColors = (nColors < 256) ? nColors: 256;
	443
	444	GetPaletteEntries(hpal,0,nColors,ape);
	445
	446	for (n=0; n<nColors; n++)
	447	{
	448	pRgb[n].rgbRed = ape[n].peRed;
	449	pRgb[n].rgbGreen = ape[n].peGreen;
	450	pRgb[n].rgbBlue = ape[n].peBlue;
	451	pRgb[n].rgbReserved = 0;
	452	}
	453	break;
	454	}
	455	}
	456	return TRUE;
	457	}
	458
	459	/*
	460	* DibCreate(bits, dx, dy)
	461	*
	462	* Creates a new packed DIB with the given dimensions and the
	463	* given number of bits per pixel
	464	*/
	465
	466	PDIB wxDibCreate(int bits, int dx, int dy)
	467	{
	468	LPBITMAPINFOHEADER lpbi ;
	469	DWORD dwSizeImage;
	470	int i;
	471	DWORD FAR *pdw;
	472
	473	dwSizeImage = dy(DWORD)((dxbits/8+3)&~3);
	474
	475	lpbi = (PDIB)GlobalAllocPtr(GHND,sizeof(BITMAPINFOHEADER)+dwSizeImage + 1024);
	476
	477	if (lpbi == NULL)
	478	return NULL;
	479
	480	lpbi->biSize = sizeof(BITMAPINFOHEADER) ;
	481	lpbi->biWidth = dx;
	482	lpbi->biHeight = dy;
	483	lpbi->biPlanes = 1;
	484	lpbi->biBitCount = bits ;
	485	lpbi->biCompression = BI_RGB ;
	486	lpbi->biSizeImage = dwSizeImage;
	487	lpbi->biXPelsPerMeter = 0 ;
	488	lpbi->biYPelsPerMeter = 0 ;
	489	lpbi->biClrUsed = 0 ;
	490	lpbi->biClrImportant = 0 ;
	491
	492	if (bits == 4)
	493	lpbi->biClrUsed = 16;
	494
	495	else if (bits == 8)
	496	lpbi->biClrUsed = 256;
	497
	498	pdw = (DWORD FAR *)((LPBYTE)lpbi+(int)lpbi->biSize);
	499
	500	for (i=0; i<(int)lpbi->biClrUsed/16; i++)
	501	{
	502	*pdw++ = 0x00000000; // 0000 black
	503	*pdw++ = 0x00800000; // 0001 dark red
	504	*pdw++ = 0x00008000; // 0010 dark green
	505	*pdw++ = 0x00808000; // 0011 mustard
	506	*pdw++ = 0x00000080; // 0100 dark blue
	507	*pdw++ = 0x00800080; // 0101 purple
	508	*pdw++ = 0x00008080; // 0110 dark turquoise
	509	*pdw++ = 0x00C0C0C0; // 1000 gray
	510	*pdw++ = 0x00808080; // 0111 dark gray
	511	*pdw++ = 0x00FF0000; // 1001 red
	512	*pdw++ = 0x0000FF00; // 1010 green
	513	*pdw++ = 0x00FFFF00; // 1011 yellow
	514	*pdw++ = 0x000000FF; // 1100 blue
	515	*pdw++ = 0x00FF00FF; // 1101 pink (magenta)
	516	*pdw++ = 0x0000FFFF; // 1110 cyan
	517	*pdw++ = 0x00FFFFFF; // 1111 white
	518	}
	519
	520	return (PDIB)lpbi;
	521	}
	522
	523	static void xlatClut8(BYTE FAR pb, DWORD dwSize, BYTE FAR xlat)
	524	{
	525	DWORD dw;
	526
	527	#ifdef __cplusplus
	528	for (dw = 0; dw < dwSize; dw++, ((BYTE _huge *&)pb)++)
	529	#else
	530	for (dw = 0; dw < dwSize; dw++, ((BYTE _huge *)pb)++)
	531	#endif
	532	pb = xlat[pb];
	533	}
	534
	535	static void xlatClut4(BYTE FAR pb, DWORD dwSize, BYTE FAR xlat)
	536	{
	537	DWORD dw;
	538
	539	#ifdef __cplusplus
	540	for (dw = 0; dw < dwSize; dw++, ((BYTE _huge *&)pb)++)
	541	#else
	542	for (dw = 0; dw < dwSize; dw++, ((BYTE _huge *)pb)++)
	543	#endif
	544	pb = (BYTE)(xlat[pb & 0x0F] \| (xlat[(*pb >> 4) & 0x0F] << 4));
	545	}
	546
	547	#define RLE_ESCAPE 0
	548	#define RLE_EOL 0
	549	#define RLE_EOF 1
	550	#define RLE_JMP 2
	551
	552	static void xlatRle8(BYTE FAR pb, DWORD WXUNUSED(dwSize), BYTE FAR xlat)
	553	{
	554	BYTE cnt;
	555	BYTE b;
	556	BYTE _huge *prle = pb;
	557
	558	for(;;)
	559	{
	560	cnt = *prle++;
	561	b = *prle;
	562
	563	if (cnt == RLE_ESCAPE)
	564	{
	565	prle++;
	566
	567	switch (b)
	568	{
	569	case RLE_EOF:
	570	return;
	571
	572	case RLE_EOL:
	573	break;
	574
	575	case RLE_JMP:
	576	prle++; // skip dX
	577	prle++; // skip dY
	578	break;
	579
	580	default:
	581	cnt = b;
	582	for (b=0; b<cnt; b++,prle++)
	583	prle = xlat[prle];
	584
	585	if (cnt & 1)
	586	prle++;
	587
	588	break;
	589	}
	590	}
	591	else
	592	{
	593	*prle++ = xlat[b];
	594	}
	595	}
	596	}
	597
	598	static void xlatRle4(BYTE FAR WXUNUSED(pb), DWORD WXUNUSED(dwSize), BYTE FAR WXUNUSED(xlat))
	599	{
	600	}
	601
	602	static void hmemmove(BYTE _huge d, BYTE _huge s, LONG len)
	603	{
	604	d += len-1;
	605	s += len-1;
	606
	607	while (len--)
	608	d-- = s--;
	609	}
	610
	611	/*
	612	* DibMapToPalette(pdib, hpal)
	613	*
	614	* Map the colors of the DIB, using GetNearestPaletteIndex, to
	615	* the colors of the given palette.
	616	*/
	617
	618	BOOL wxDibMapToPalette(PDIB pdib, HPALETTE hpal)
	619	{
	620	LPBITMAPINFOHEADER lpbi;
	621	PALETTEENTRY pe;
	622	int n;
	623	int nDibColors;
	624	int nPalColors=0;
	625	BYTE FAR * lpBits;
	626	RGBQUAD FAR * lpRgb;
	627	BYTE xlat[256];
	628	DWORD SizeImage;
	629
	630	if (!hpal \|\| !pdib)
	631	return FALSE;
	632
	633	lpbi = (LPBITMAPINFOHEADER)pdib;
	634	lpRgb = wxDibColors(pdib);
	635
	636	GetObject(hpal,sizeof(int),(LPSTR)&nPalColors);
	637	nDibColors = wxDibNumColors(pdib);
	638
	639	if ((SizeImage = lpbi->biSizeImage) == 0)
	640	SizeImage = wxDibSizeImage(lpbi);
	641
	642	//
	643	// build a xlat table. from the current DIB colors to the given
	644	// palette.
	645	//
	646	for (n=0; n<nDibColors; n++)
	647	xlat[n] = (BYTE)GetNearestPaletteIndex(hpal,RGB(lpRgb[n].rgbRed,lpRgb[n].rgbGreen,lpRgb[n].rgbBlue));
	648
	649	lpBits = (LPBYTE)wxDibPtr(lpbi);
	650	lpbi->biClrUsed = nPalColors;
	651
	652	//
	653	// re-size the DIB
	654	//
	655	if (nPalColors > nDibColors)
	656	{
	657	GlobalReAllocPtr(lpbi, lpbi->biSize + nPalColors*sizeof(RGBQUAD) + SizeImage, 0);
	658	hmemmove((BYTE _huge )wxDibPtr(lpbi), (BYTE _huge )lpBits, SizeImage);
	659	lpBits = (LPBYTE)wxDibPtr(lpbi);
	660	}
	661	else if (nPalColors < nDibColors)
	662	{
	663	hmemcpy(wxDibPtr(lpbi), lpBits, SizeImage);
	664	GlobalReAllocPtr(lpbi, lpbi->biSize + nPalColors*sizeof(RGBQUAD) + SizeImage, 0);
	665	lpBits = (LPBYTE)wxDibPtr(lpbi);
	666	}
	667
	668	//
	669	// translate the DIB bits
	670	//
	671	switch (lpbi->biCompression)
	672	{
	673	case BI_RLE8:
	674	xlatRle8(lpBits, SizeImage, xlat);
	675	break;
	676
	677	case BI_RLE4:
	678	xlatRle4(lpBits, SizeImage, xlat);
	679	break;
	680
	681	case BI_RGB:
	682	if (lpbi->biBitCount == 8)
	683	xlatClut8(lpBits, SizeImage, xlat);
	684	else
	685	xlatClut4(lpBits, SizeImage, xlat);
	686	break;
	687	}
	688
	689	//
	690	// Now copy the RGBs in the logical palette to the dib color table
	691	//
	692	for (n=0; n<nPalColors; n++)
	693	{
	694	GetPaletteEntries(hpal,n,1,&pe);
	695
	696	lpRgb[n].rgbRed = pe.peRed;
	697	lpRgb[n].rgbGreen = pe.peGreen;
	698	lpRgb[n].rgbBlue = pe.peBlue;
	699	lpRgb[n].rgbReserved = (BYTE)0;
	700	}
	701
	702	return TRUE;
	703	}
	704
	705
	706	HPALETTE wxMakePalette(const BITMAPINFO FAR* Info, UINT flags)
	707	{
	708	HPALETTE hPalette;
	709	const RGBQUAD FAR* rgb = Info->bmiColors;
	710
	711	WORD nColors = (WORD)Info->bmiHeader.biClrUsed;
	712	if (nColors) {
	713	LOGPALETTE* logPal = (LOGPALETTE*)
	714	new BYTE[sizeof(LOGPALETTE) + (nColors-1)*sizeof(PALETTEENTRY)];
	715
	716	logPal->palVersion = 0x300; // Windows 3.0 version
	717	logPal->palNumEntries = nColors;
	718	for (WORD n = 0; n < nColors; n++) {
	719	logPal->palPalEntry[n].peRed = rgb[n].rgbRed;
	720	logPal->palPalEntry[n].peGreen = rgb[n].rgbGreen;
	721	logPal->palPalEntry[n].peBlue = rgb[n].rgbBlue;
	722	logPal->palPalEntry[n].peFlags = (BYTE)flags;
	723	}
	724	hPalette = ::CreatePalette(logPal);
	725	delete logPal;
	726	} else
	727	hPalette = 0;
	728
	729	return hPalette;
	730	}
	731