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__
/* Why module.h? No longer finds this header.
   #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	/* Why module.h? No longer finds this header.
	37	#include <module.h>
	38	*/
	39	#endif
	40
	41	#if defined(__WIN32__)
	42	#if !defined(__MWERKS__) && !defined(__SALFORDC__)
	43	#include <memory.h> // for _fmemcpy()
	44	#endif
	45	#define _huge
	46	#ifndef hmemcpy
	47	#define hmemcpy memcpy
	48	#endif
	49	#endif
	50
	51	#define BFT_ICON 0x4349 /* 'IC' */
	52	#define BFT_BITMAP 0x4d42 /* 'BM' */
	53	#define BFT_CURSOR 0x5450 /* 'PT(' */
	54
	55	#ifndef SEEK_CUR
	56	/* flags for _lseek */
	57	#define SEEK_CUR 1
	58	#define SEEK_END 2
	59	#define SEEK_SET 0
	60	#endif
	61
	62	/* Copied from PNGhandler for coompilation with MingW32, RR */
	63
	64	#ifndef GlobalAllocPtr
	65	#define GlobalPtrHandle(lp) \
	66	((HGLOBAL)GlobalHandle(lp))
	67
	68	#define GlobalLockPtr(lp) \
	69	((BOOL)GlobalLock(GlobalPtrHandle(lp)))
	70	#define GlobalUnlockPtr(lp) \
	71	GlobalUnlock(GlobalPtrHandle(lp))
	72
	73	#define GlobalAllocPtr(flags, cb) \
	74	(GlobalLock(GlobalAlloc((flags), (cb))))
	75	#define GlobalReAllocPtr(lp, cbNew, flags) \
	76	(GlobalUnlockPtr(lp), GlobalLock(GlobalReAlloc(GlobalPtrHandle(lp) , (cbNew), (flags))))
	77	#define GlobalFreePtr(lp) \
	78	(GlobalUnlockPtr(lp), (BOOL)GlobalFree(GlobalPtrHandle(lp)))
	79	#endif
	80
	81
	82	/*
	83	* Clear the System Palette so that we can ensure an identity palette
	84	* mapping for fast performance.
	85	*/
	86
	87	void wxClearSystemPalette(void)
	88	{
	89	//*** A dummy palette setup
	90	struct
	91	{
	92	WORD Version;
	93	WORD NumberOfEntries;
	94	PALETTEENTRY aEntries[256];
	95	} Palette =
	96	{
	97	0x300,
	98	256
	99	};
	100
	101	HPALETTE ScreenPalette = 0;
	102	HDC ScreenDC;
	103	int Counter;
	104	UINT nMapped = 0;
	105	BOOL bOK = FALSE;
	106	int nOK = 0;
	107
	108	// *** Reset everything in the system palette to black
	109	for(Counter = 0; Counter < 256; Counter++)
	110	{
	111	Palette.aEntries[Counter].peRed = 0;
	112	Palette.aEntries[Counter].peGreen = 0;
	113	Palette.aEntries[Counter].peBlue = 0;
	114	Palette.aEntries[Counter].peFlags = PC_NOCOLLAPSE;
	115	}
	116
	117	// *** Create, select, realize, deselect, and delete the palette
	118	#ifdef __WXWINE__
	119	ScreenDC = GetDC((HWND)NULL);
	120	#else
	121	ScreenDC = GetDC(NULL);
	122	#endif
	123	ScreenPalette = CreatePalette((LOGPALETTE *)&Palette);
	124
	125	if (ScreenPalette)
	126	{
	127	ScreenPalette = SelectPalette(ScreenDC,ScreenPalette,FALSE);
	128	nMapped = RealizePalette(ScreenDC);
	129	ScreenPalette = SelectPalette(ScreenDC,ScreenPalette,FALSE);
	130	bOK = DeleteObject(ScreenPalette);
	131	}
	132
	133	#ifdef __WXWINE__
	134	nOK = ReleaseDC((HWND)NULL, ScreenDC);
	135	#else
	136	nOK = ReleaseDC(NULL, ScreenDC);
	137	#endif
	138
	139	return;
	140	}
	141
	142
	143	/*
	144	* Open a DIB file and return a MEMORY DIB, a memory handle containing..
	145	*
	146	* BITMAP INFO bi
	147	* palette data
	148	* bits....
	149	*/
	150
	151	int wxDibWriteFile(LPTSTR szFile, LPBITMAPINFOHEADER lpbi)
	152	{
	153	HFILE fh;
	154	OFSTRUCT of;
	155
	156	fh = OpenFile(wxConvFile.cWX2MB(szFile), &of, OF_WRITE \| OF_CREATE);
	157
	158	if (!fh) {
	159	// printf("la regamos0");
	160	return 0;
	161	}
	162
	163	long size = wxDibSize(lpbi);
	164
	165	// write file header
	166	BITMAPFILEHEADER bmf;
	167	bmf.bfType = BFT_BITMAP;
	168	bmf.bfSize = sizeof(bmf) + size;
	169	bmf.bfReserved1 = 0;
	170	bmf.bfReserved2 = 0;
	171	bmf.bfOffBits = sizeof(bmf) + (char FAR)(wxDibPtr(lpbi)) - (char FAR)lpbi;
	172	#if 1 // defined( __WATCOMC__) \|\| defined(__VISUALC__) \|\| defined(__SC__) \|\| defined(__SALFORDC__) \|\| defined(__MWERKS__) \|\| wxUSE_NORLANDER_HEADERS
	173	#define HWRITE_2ND_ARG_TYPE LPCSTR
	174	#else // don't know who needs this...
	175	#define HWRITE_2ND_ARG_TYPE LPBYTE
	176	#endif
	177
	178	if ( _hwrite(fh, (HWRITE_2ND_ARG_TYPE)(&bmf), sizeof(bmf)) < 0 \|\|
	179	_hwrite(fh, (HWRITE_2ND_ARG_TYPE)lpbi, size) < 0 )
	180	{
	181	_lclose(fh);
	182	return 0;
	183	}
	184
	185	#undef HWRITE_2ND_ARG_TYPE
	186
	187	_lclose(fh);
	188	return 1;
	189	}
	190
	191	PDIB wxDibOpenFile(LPTSTR szFile)
	192	{
	193	HFILE fh;
	194	DWORD dwLen;
	195	DWORD dwBits;
	196	PDIB pdib;
	197	LPVOID p;
	198	OFSTRUCT of;
	199
	200	#if defined(WIN32) \|\| defined(_WIN32)
	201	#define GetCurrentInstance() GetModuleHandle(NULL)
	202	#else
	203	#define GetCurrentInstance() (HINSTANCE)SELECTOROF((LPVOID)&of)
	204	#endif
	205
	206	fh = OpenFile(wxConvFile.cWX2MB(szFile), &of, OF_READ);
	207
	208	if (fh == -1)
	209	{
	210	HRSRC h;
	211
	212	// TODO: Unicode version
	213	#ifdef __WIN16__
	214	h = FindResource(GetCurrentInstance(), szFile, RT_BITMAP);
	215	#elif wxUSE_UNICODE
	216	h = FindResourceW(GetCurrentInstance(), szFile, RT_BITMAP);
	217	#else
	218	h = FindResourceA(GetCurrentInstance(), szFile, RT_BITMAP);
	219	#endif
	220
	221	#if defined(__WIN32__)
	222	//!!! can we call GlobalFree() on this? is it the right format.
	223	//!!! can we write to this resource?
	224	if (h)
	225	return (PDIB)LockResource(LoadResource(GetCurrentInstance(), h));
	226	#else
	227	if (h)
	228	fh = AccessResource(GetCurrentInstance(), h);
	229	#endif
	230	}
	231
	232	if (fh == -1)
	233	return NULL;
	234
	235	pdib = wxDibReadBitmapInfo(fh);
	236
	237	if (!pdib)
	238	return NULL;
	239
	240	/* How much memory do we need to hold the DIB */
	241
	242	dwBits = pdib->biSizeImage;
	243	dwLen = pdib->biSize + wxDibPaletteSize(pdib) + dwBits;
	244
	245	/* Can we get more memory? */
	246
	247	p = GlobalReAllocPtr(pdib,dwLen,0);
	248
	249	if (!p)
	250	{
	251	GlobalFreePtr(pdib);
	252	pdib = NULL;
	253	}
	254	else
	255	{
	256	pdib = (PDIB)p;
	257	}
	258
	259	if (pdib)
	260	{
	261	/* read in the bits */
	262	_hread(fh, (LPBYTE)pdib + (UINT)pdib->biSize + wxDibPaletteSize(pdib), dwBits);
	263	}
	264
	265	_lclose(fh);
	266
	267	return pdib;
	268	}
	269
	270
	271	/*
	272	* ReadDibBitmapInfo()
	273	*
	274	* Will read a file in DIB format and return a global HANDLE to its
	275	* BITMAPINFO. This function will work with both "old" and "new"
	276	* bitmap formats, but will always return a "new" BITMAPINFO.
	277	*/
	278
	279	PDIB wxDibReadBitmapInfo(HFILE fh)
	280	{
	281	DWORD off;
	282	int size;
	283	int i;
	284	int nNumColors;
	285
	286	RGBQUAD FAR *pRgb;
	287	BITMAPINFOHEADER bi;
	288	BITMAPCOREHEADER bc;
	289	BITMAPFILEHEADER bf;
	290	PDIB pdib;
	291
	292	if (fh == -1)
	293	return NULL;
	294
	295	off = _llseek(fh,0L,SEEK_CUR);
	296
	297	if (sizeof(bf) != _lread(fh,(LPSTR)&bf,sizeof(bf)))
	298	return NULL;
	299
	300	/*
	301	* do we have a RC HEADER?
	302	*/
	303	if (bf.bfType != BFT_BITMAP)
	304	{
	305	bf.bfOffBits = 0L;
	306	_llseek(fh,off,SEEK_SET);
	307	}
	308
	309	if (sizeof(bi) != _lread(fh,(LPSTR)&bi,sizeof(bi)))
	310	return NULL;
	311
	312	/*
	313	* what type of bitmap info is this?
	314	*/
	315	switch (size = (int)bi.biSize)
	316	{
	317	default:
	318	case sizeof(BITMAPINFOHEADER):
	319	break;
	320
	321	case sizeof(BITMAPCOREHEADER):
	322	bc = (BITMAPCOREHEADER)&bi;
	323	bi.biSize = sizeof(BITMAPINFOHEADER);
	324	bi.biWidth = (DWORD)bc.bcWidth;
	325	bi.biHeight = (DWORD)bc.bcHeight;
	326	bi.biPlanes = (WORD)bc.bcPlanes;
	327	bi.biBitCount = (WORD)bc.bcBitCount;
	328	bi.biCompression = BI_RGB;
	329	bi.biSizeImage = 0;
	330	bi.biXPelsPerMeter = 0;
	331	bi.biYPelsPerMeter = 0;
	332	bi.biClrUsed = 0;
	333	bi.biClrImportant = 0;
	334
	335	_llseek(fh,(LONG)sizeof(BITMAPCOREHEADER)-sizeof(BITMAPINFOHEADER),SEEK_CUR);
	336
	337	break;
	338	}
	339
	340	nNumColors = wxDibNumColors(&bi);
	341
	342	#if 0
	343	if (bi.biSizeImage == 0)
	344	bi.biSizeImage = DibSizeImage(&bi);
	345
	346	if (bi.biClrUsed == 0)
	347	bi.biClrUsed = wxDibNumColors(&bi);
	348	#else
	349	wxFixBitmapInfo(&bi);
	350	#endif
	351
	352	pdib = (PDIB)GlobalAllocPtr(GMEM_MOVEABLE,(LONG)bi.biSize + nNumColors * sizeof(RGBQUAD));
	353
	354	if (!pdib)
	355	return NULL;
	356
	357	*pdib = bi;
	358
	359	pRgb = wxDibColors(pdib);
	360
	361	if (nNumColors)
	362	{
	363	if (size == sizeof(BITMAPCOREHEADER))
	364	{
	365	/*
	366	* convert a old color table (3 byte entries) to a new
	367	* color table (4 byte entries)
	368	*/
	369	_lread(fh,(LPVOID)pRgb,nNumColors * sizeof(RGBTRIPLE));
	370
	371	for (i=nNumColors-1; i>=0; i--)
	372	{
	373	RGBQUAD rgb;
	374
	375	rgb.rgbRed = ((RGBTRIPLE FAR *)pRgb)[i].rgbtRed;
	376	rgb.rgbBlue = ((RGBTRIPLE FAR *)pRgb)[i].rgbtBlue;
	377	rgb.rgbGreen = ((RGBTRIPLE FAR *)pRgb)[i].rgbtGreen;
	378	rgb.rgbReserved = (BYTE)0;
	379
	380	pRgb[i] = rgb;
	381	}
	382	}
	383	else
	384	{
	385	_lread(fh,(LPVOID)pRgb,nNumColors * sizeof(RGBQUAD));
	386	}
	387	}
	388
	389	if (bf.bfOffBits != 0L)
	390	_llseek(fh,off + bf.bfOffBits,SEEK_SET);
	391
	392	return pdib;
	393	}
	394
	395	/*
	396	* DibSetUsage(hdib,hpal,wUsage)
	397	*
	398	* Modifies the color table of the passed DIB for use with the wUsage
	399	* parameter specifed.
	400	*
	401	* if wUsage is DIB_PAL_COLORS the DIB color table is set to 0-256
	402	* if wUsage is DIB_RGB_COLORS the DIB color table is set to the RGB values
	403	* in the passed palette
	404	*/
	405
	406	BOOL wxDibSetUsage(PDIB pdib, HPALETTE hpal,UINT wUsage)
	407	{
	408	PALETTEENTRY ape[256];
	409	RGBQUAD FAR * pRgb;
	410	WORD FAR * pw;
	411	int nColors;
	412	int n;
	413
	414	if (hpal == NULL)
	415	hpal = (HPALETTE)GetStockObject(DEFAULT_PALETTE);
	416
	417	if (!pdib)
	418	return FALSE;
	419
	420	nColors = wxDibNumColors(pdib);
	421
	422	if (nColors == 3 && wxDibCompression(pdib) == BI_BITFIELDS)
	423	nColors = 0;
	424
	425	if (nColors > 0)
	426	{
	427	pRgb = wxDibColors(pdib);
	428
	429	switch (wUsage)
	430	{
	431	//
	432	// Set the DIB color table to palette indexes
	433	//
	434	case DIB_PAL_COLORS:
	435	for (pw = (WORD FAR*)pRgb,n=0; n<nColors; n++,pw++)
	436	*pw = n;
	437	break;
	438
	439	//
	440	// Set the DIB color table to RGBQUADS
	441	//
	442	default:
	443	case DIB_RGB_COLORS:
	444	nColors = (nColors < 256) ? nColors: 256;
	445
	446	GetPaletteEntries(hpal,0,nColors,ape);
	447
	448	for (n=0; n<nColors; n++)
	449	{
	450	pRgb[n].rgbRed = ape[n].peRed;
	451	pRgb[n].rgbGreen = ape[n].peGreen;
	452	pRgb[n].rgbBlue = ape[n].peBlue;
	453	pRgb[n].rgbReserved = 0;
	454	}
	455	break;
	456	}
	457	}
	458	return TRUE;
	459	}
	460
	461	/*
	462	* DibCreate(bits, dx, dy)
	463	*
	464	* Creates a new packed DIB with the given dimensions and the
	465	* given number of bits per pixel
	466	*/
	467
	468	PDIB wxDibCreate(int bits, int dx, int dy)
	469	{
	470	LPBITMAPINFOHEADER lpbi ;
	471	DWORD dwSizeImage;
	472	int i;
	473	DWORD FAR *pdw;
	474
	475	dwSizeImage = dy(DWORD)((dxbits/8+3)&~3);
	476
	477	lpbi = (PDIB)GlobalAllocPtr(GHND,sizeof(BITMAPINFOHEADER)+dwSizeImage + 1024);
	478
	479	if (lpbi == NULL)
	480	return NULL;
	481
	482	lpbi->biSize = sizeof(BITMAPINFOHEADER) ;
	483	lpbi->biWidth = dx;
	484	lpbi->biHeight = dy;
	485	lpbi->biPlanes = 1;
	486	lpbi->biBitCount = bits ;
	487	lpbi->biCompression = BI_RGB ;
	488	lpbi->biSizeImage = dwSizeImage;
	489	lpbi->biXPelsPerMeter = 0 ;
	490	lpbi->biYPelsPerMeter = 0 ;
	491	lpbi->biClrUsed = 0 ;
	492	lpbi->biClrImportant = 0 ;
	493
	494	if (bits == 4)
	495	lpbi->biClrUsed = 16;
	496
	497	else if (bits == 8)
	498	lpbi->biClrUsed = 256;
	499
	500	pdw = (DWORD FAR *)((LPBYTE)lpbi+(int)lpbi->biSize);
	501
	502	for (i=0; i<(int)lpbi->biClrUsed/16; i++)
	503	{
	504	*pdw++ = 0x00000000; // 0000 black
	505	*pdw++ = 0x00800000; // 0001 dark red
	506	*pdw++ = 0x00008000; // 0010 dark green
	507	*pdw++ = 0x00808000; // 0011 mustard
	508	*pdw++ = 0x00000080; // 0100 dark blue
	509	*pdw++ = 0x00800080; // 0101 purple
	510	*pdw++ = 0x00008080; // 0110 dark turquoise
	511	*pdw++ = 0x00C0C0C0; // 1000 gray
	512	*pdw++ = 0x00808080; // 0111 dark gray
	513	*pdw++ = 0x00FF0000; // 1001 red
	514	*pdw++ = 0x0000FF00; // 1010 green
	515	*pdw++ = 0x00FFFF00; // 1011 yellow
	516	*pdw++ = 0x000000FF; // 1100 blue
	517	*pdw++ = 0x00FF00FF; // 1101 pink (magenta)
	518	*pdw++ = 0x0000FFFF; // 1110 cyan
	519	*pdw++ = 0x00FFFFFF; // 1111 white
	520	}
	521
	522	return (PDIB)lpbi;
	523	}
	524
	525	static void xlatClut8(BYTE FAR pb, DWORD dwSize, BYTE FAR xlat)
	526	{
	527	DWORD dw;
	528
	529	#ifdef __cplusplus
	530	for (dw = 0; dw < dwSize; dw++, ((BYTE _huge *&)pb)++)
	531	#else
	532	for (dw = 0; dw < dwSize; dw++, ((BYTE _huge *)pb)++)
	533	#endif
	534	pb = xlat[pb];
	535	}
	536
	537	static void xlatClut4(BYTE FAR pb, DWORD dwSize, BYTE FAR xlat)
	538	{
	539	DWORD dw;
	540
	541	#ifdef __cplusplus
	542	for (dw = 0; dw < dwSize; dw++, ((BYTE _huge *&)pb)++)
	543	#else
	544	for (dw = 0; dw < dwSize; dw++, ((BYTE _huge *)pb)++)
	545	#endif
	546	pb = (BYTE)(xlat[pb & 0x0F] \| (xlat[(*pb >> 4) & 0x0F] << 4));
	547	}
	548
	549	#define RLE_ESCAPE 0
	550	#define RLE_EOL 0
	551	#define RLE_EOF 1
	552	#define RLE_JMP 2
	553
	554	static void xlatRle8(BYTE FAR pb, DWORD WXUNUSED(dwSize), BYTE FAR xlat)
	555	{
	556	BYTE cnt;
	557	BYTE b;
	558	BYTE _huge *prle = pb;
	559
	560	for(;;)
	561	{
	562	cnt = *prle++;
	563	b = *prle;
	564
	565	if (cnt == RLE_ESCAPE)
	566	{
	567	prle++;
	568
	569	switch (b)
	570	{
	571	case RLE_EOF:
	572	return;
	573
	574	case RLE_EOL:
	575	break;
	576
	577	case RLE_JMP:
	578	prle++; // skip dX
	579	prle++; // skip dY
	580	break;
	581
	582	default:
	583	cnt = b;
	584	for (b=0; b<cnt; b++,prle++)
	585	prle = xlat[prle];
	586
	587	if (cnt & 1)
	588	prle++;
	589
	590	break;
	591	}
	592	}
	593	else
	594	{
	595	*prle++ = xlat[b];
	596	}
	597	}
	598	}
	599
	600	static void xlatRle4(BYTE FAR WXUNUSED(pb), DWORD WXUNUSED(dwSize), BYTE FAR WXUNUSED(xlat))
	601	{
	602	}
	603
	604	static void hmemmove(BYTE _huge d, BYTE _huge s, LONG len)
	605	{
	606	d += len-1;
	607	s += len-1;
	608
	609	while (len--)
	610	d-- = s--;
	611	}
	612
	613	/*
	614	* DibMapToPalette(pdib, hpal)
	615	*
	616	* Map the colors of the DIB, using GetNearestPaletteIndex, to
	617	* the colors of the given palette.
	618	*/
	619
	620	BOOL wxDibMapToPalette(PDIB pdib, HPALETTE hpal)
	621	{
	622	LPBITMAPINFOHEADER lpbi;
	623	PALETTEENTRY pe;
	624	int n;
	625	int nDibColors;
	626	int nPalColors=0;
	627	BYTE FAR * lpBits;
	628	RGBQUAD FAR * lpRgb;
	629	BYTE xlat[256];
	630	DWORD SizeImage;
	631
	632	if (!hpal \|\| !pdib)
	633	return FALSE;
	634
	635	lpbi = (LPBITMAPINFOHEADER)pdib;
	636	lpRgb = wxDibColors(pdib);
	637
	638	GetObject(hpal,sizeof(int),(LPSTR)&nPalColors);
	639	nDibColors = wxDibNumColors(pdib);
	640
	641	if ((SizeImage = lpbi->biSizeImage) == 0)
	642	SizeImage = wxDibSizeImage(lpbi);
	643
	644	//
	645	// build a xlat table. from the current DIB colors to the given
	646	// palette.
	647	//
	648	for (n=0; n<nDibColors; n++)
	649	xlat[n] = (BYTE)GetNearestPaletteIndex(hpal,RGB(lpRgb[n].rgbRed,lpRgb[n].rgbGreen,lpRgb[n].rgbBlue));
	650
	651	lpBits = (LPBYTE)wxDibPtr(lpbi);
	652	lpbi->biClrUsed = nPalColors;
	653
	654	//
	655	// re-size the DIB
	656	//
	657	if (nPalColors > nDibColors)
	658	{
	659	GlobalReAllocPtr(lpbi, lpbi->biSize + nPalColors*sizeof(RGBQUAD) + SizeImage, 0);
	660	hmemmove((BYTE _huge )wxDibPtr(lpbi), (BYTE _huge )lpBits, SizeImage);
	661	lpBits = (LPBYTE)wxDibPtr(lpbi);
	662	}
	663	else if (nPalColors < nDibColors)
	664	{
	665	hmemcpy(wxDibPtr(lpbi), lpBits, SizeImage);
	666	GlobalReAllocPtr(lpbi, lpbi->biSize + nPalColors*sizeof(RGBQUAD) + SizeImage, 0);
	667	lpBits = (LPBYTE)wxDibPtr(lpbi);
	668	}
	669
	670	//
	671	// translate the DIB bits
	672	//
	673	switch (lpbi->biCompression)
	674	{
	675	case BI_RLE8:
	676	xlatRle8(lpBits, SizeImage, xlat);
	677	break;
	678
	679	case BI_RLE4:
	680	xlatRle4(lpBits, SizeImage, xlat);
	681	break;
	682
	683	case BI_RGB:
	684	if (lpbi->biBitCount == 8)
	685	xlatClut8(lpBits, SizeImage, xlat);
	686	else
	687	xlatClut4(lpBits, SizeImage, xlat);
	688	break;
	689	}
	690
	691	//
	692	// Now copy the RGBs in the logical palette to the dib color table
	693	//
	694	for (n=0; n<nPalColors; n++)
	695	{
	696	GetPaletteEntries(hpal,n,1,&pe);
	697
	698	lpRgb[n].rgbRed = pe.peRed;
	699	lpRgb[n].rgbGreen = pe.peGreen;
	700	lpRgb[n].rgbBlue = pe.peBlue;
	701	lpRgb[n].rgbReserved = (BYTE)0;
	702	}
	703
	704	return TRUE;
	705	}
	706
	707
	708	HPALETTE wxMakePalette(const BITMAPINFO FAR* Info, UINT flags)
	709	{
	710	HPALETTE hPalette;
	711	const RGBQUAD FAR* rgb = Info->bmiColors;
	712
	713	WORD nColors = (WORD)Info->bmiHeader.biClrUsed;
	714	if (nColors) {
	715	LOGPALETTE* logPal = (LOGPALETTE*)
	716	new BYTE[sizeof(LOGPALETTE) + (nColors-1)*sizeof(PALETTEENTRY)];
	717
	718	logPal->palVersion = 0x300; // Windows 3.0 version
	719	logPal->palNumEntries = nColors;
	720	for (WORD n = 0; n < nColors; n++) {
	721	logPal->palPalEntry[n].peRed = rgb[n].rgbRed;
	722	logPal->palPalEntry[n].peGreen = rgb[n].rgbGreen;
	723	logPal->palPalEntry[n].peBlue = rgb[n].rgbBlue;
	724	logPal->palPalEntry[n].peFlags = (BYTE)flags;
	725	}
	726	hPalette = ::CreatePalette(logPal);
	727	delete logPal;
	728	} else
	729	hPalette = 0;
	730
	731	return hPalette;
	732	}
	733