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 <stdio.h>
#include "wx/setup.h"
#include "wx/defs.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' */

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


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

void ClearSystemPalette(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 DibWriteFile(LPSTR szFile, LPBITMAPINFOHEADER lpbi)
{
   HFILE               fh;
   OFSTRUCT            of;

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

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

  long size = DibSize(lpbi);

  // write file header
  BITMAPFILEHEADER bmf;
  bmf.bfType = 'BM';
  bmf.bfSize = sizeof(bmf) + size;
  bmf.bfReserved1 = 0;
  bmf.bfReserved2 = 0;
  bmf.bfOffBits = sizeof(bmf) + (char far*)(DibPtr(lpbi)) - (char far*)lpbi;
#if defined( __WATCOMC__) || defined(__VISUALC__) || defined(__SC__) || defined(__SALFORDC__) || defined(__MWERKS__)
  if (_hwrite(fh, (LPCSTR)(&bmf), sizeof(bmf))<0 ||
  _hwrite(fh, (LPCSTR)lpbi, size)<0) {
    _lclose(fh);
//   printf("la regamos1");
    return 0;
  }
#else
  if (_hwrite(fh, (LPBYTE)(&bmf), sizeof(bmf))<0 ||
  _hwrite(fh, (LPBYTE)lpbi, size)<0) {
    _lclose(fh);
//   printf("la regamos1");
    return 0;
  }
#endif

  _lclose(fh);
  return 1;
}

PDIB DibOpenFile(LPSTR 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(szFile, &of, OF_READ);

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

          // TODO: Unicode version
#ifdef __WIN16__
      h = FindResource(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 = DibReadBitmapInfo(fh);

   if (!pdib)
      return NULL;

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

    dwBits = pdib->biSizeImage;
    dwLen  = pdib->biSize + DibPaletteSize(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 + DibPaletteSize(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 DibReadBitmapInfo(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 FALSE;

    /*
     *  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 FALSE;

    /*
     *  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             =  (UINT)bc.bcPlanes;
            bi.biBitCount           =  (UINT)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 = DibNumColors(&bi);

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

    if (bi.biClrUsed == 0)
        bi.biClrUsed = DibNumColors(&bi);
#else
    FixBitmapInfo(&bi);
#endif

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

    if (!pdib)
        return NULL;

    *pdib = bi;

    pRgb = DibColors(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 DibSetUsage(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 = DibNumColors(pdib);

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

    if (nColors > 0)
    {
        pRgb = DibColors(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 DibCreate(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 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 *pb, DWORD dwSize, BYTE FAR *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 DibMapToPalette(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  = DibColors(pdib);

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

   if ((SizeImage = lpbi->biSizeImage) == 0)
      SizeImage = DibSizeImage(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)DibPtr(lpbi);
   lpbi->biClrUsed = nPalColors;

   //
   // re-size the DIB
   //
   if (nPalColors > nDibColors)
   {
      GlobalReAllocPtr(lpbi, lpbi->biSize + nPalColors*sizeof(RGBQUAD) + SizeImage, 0);
      hmemmove((BYTE _huge *)DibPtr(lpbi), (BYTE _huge *)lpBits, SizeImage);
      lpBits = (LPBYTE)DibPtr(lpbi);
   }
   else if (nPalColors < nDibColors)
   {
      hmemcpy(DibPtr(lpbi), lpBits, SizeImage);
      GlobalReAllocPtr(lpbi, lpbi->biSize + nPalColors*sizeof(RGBQUAD) + SizeImage, 0);
      lpBits = (LPBYTE)DibPtr(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 MakePalette(const BITMAPINFO FAR* Info, UINT flags)
{
  HPALETTE hPalette;
  const RGBQUAD far* rgb = Info->bmiColors;

  WORD nColors = 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 (short 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 <stdio.h>
	25	#include "wx/setup.h"
	26	#include "wx/defs.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	/* flags for _lseek */
	54	#define SEEK_CUR 1
	55	#define SEEK_END 2
	56	#define SEEK_SET 0
	57
	58
	59	/*
	60	* Clear the System Palette so that we can ensure an identity palette
	61	* mapping for fast performance.
	62	*/
	63
	64	void ClearSystemPalette(void)
	65	{
	66	//*** A dummy palette setup
	67	struct
	68	{
	69	WORD Version;
	70	WORD NumberOfEntries;
	71	PALETTEENTRY aEntries[256];
	72	} Palette =
	73	{
	74	0x300,
	75	256
	76	};
	77
	78	HPALETTE ScreenPalette = 0;
	79	HDC ScreenDC;
	80	int Counter;
	81	UINT nMapped = 0;
	82	BOOL bOK = FALSE;
	83	int nOK = 0;
	84
	85	// *** Reset everything in the system palette to black
	86	for(Counter = 0; Counter < 256; Counter++)
	87	{
	88	Palette.aEntries[Counter].peRed = 0;
	89	Palette.aEntries[Counter].peGreen = 0;
	90	Palette.aEntries[Counter].peBlue = 0;
	91	Palette.aEntries[Counter].peFlags = PC_NOCOLLAPSE;
	92	}
	93
	94	// *** Create, select, realize, deselect, and delete the palette
	95	#ifdef __WXWINE__
	96	ScreenDC = GetDC((HWND)NULL);
	97	#else
	98	ScreenDC = GetDC(NULL);
	99	#endif
	100	ScreenPalette = CreatePalette((LOGPALETTE *)&Palette);
	101
	102	if (ScreenPalette)
	103	{
	104	ScreenPalette = SelectPalette(ScreenDC,ScreenPalette,FALSE);
	105	nMapped = RealizePalette(ScreenDC);
	106	ScreenPalette = SelectPalette(ScreenDC,ScreenPalette,FALSE);
	107	bOK = DeleteObject(ScreenPalette);
	108	}
	109
	110	#ifdef __WXWINE__
	111	nOK = ReleaseDC((HWND)NULL, ScreenDC);
	112	#else
	113	nOK = ReleaseDC(NULL, ScreenDC);
	114	#endif
	115
	116	return;
	117	}
	118
	119
	120	/*
	121	* Open a DIB file and return a MEMORY DIB, a memory handle containing..
	122	*
	123	* BITMAP INFO bi
	124	* palette data
	125	* bits....
	126	*/
	127
	128	int DibWriteFile(LPSTR szFile, LPBITMAPINFOHEADER lpbi)
	129	{
	130	HFILE fh;
	131	OFSTRUCT of;
	132
	133	fh = OpenFile(szFile, &of, OF_WRITE \| OF_CREATE);
	134
	135	if (!fh) {
	136	// printf("la regamos0");
	137	return 0;
	138	}
	139
	140	long size = DibSize(lpbi);
	141
	142	// write file header
	143	BITMAPFILEHEADER bmf;
	144	bmf.bfType = 'BM';
	145	bmf.bfSize = sizeof(bmf) + size;
	146	bmf.bfReserved1 = 0;
	147	bmf.bfReserved2 = 0;
	148	bmf.bfOffBits = sizeof(bmf) + (char far)(DibPtr(lpbi)) - (char far)lpbi;
	149	#if defined( __WATCOMC__) \|\| defined(__VISUALC__) \|\| defined(__SC__) \|\| defined(__SALFORDC__) \|\| defined(__MWERKS__)
	150	if (_hwrite(fh, (LPCSTR)(&bmf), sizeof(bmf))<0 \|\|
	151	_hwrite(fh, (LPCSTR)lpbi, size)<0) {
	152	_lclose(fh);
	153	// printf("la regamos1");
	154	return 0;
	155	}
	156	#else
	157	if (_hwrite(fh, (LPBYTE)(&bmf), sizeof(bmf))<0 \|\|
	158	_hwrite(fh, (LPBYTE)lpbi, size)<0) {
	159	_lclose(fh);
	160	// printf("la regamos1");
	161	return 0;
	162	}
	163	#endif
	164
	165	_lclose(fh);
	166	return 1;
	167	}
	168
	169	PDIB DibOpenFile(LPSTR szFile)
	170	{
	171	HFILE fh;
	172	DWORD dwLen;
	173	DWORD dwBits;
	174	PDIB pdib;
	175	LPVOID p;
	176	OFSTRUCT of;
	177
	178	#if defined(WIN32) \|\| defined(_WIN32)
	179	#define GetCurrentInstance() GetModuleHandle(NULL)
	180	#else
	181	#define GetCurrentInstance() (HINSTANCE)SELECTOROF((LPVOID)&of)
	182	#endif
	183
	184	fh = OpenFile(szFile, &of, OF_READ);
	185
	186	if (fh == -1)
	187	{
	188	HRSRC h;
	189
	190	// TODO: Unicode version
	191	#ifdef __WIN16__
	192	h = FindResource(GetCurrentInstance(), szFile, RT_BITMAP);
	193	#else
	194	h = FindResourceA(GetCurrentInstance(), szFile, RT_BITMAP);
	195	#endif
	196
	197	#if defined(__WIN32__)
	198	//!!! can we call GlobalFree() on this? is it the right format.
	199	//!!! can we write to this resource?
	200	if (h)
	201	return (PDIB)LockResource(LoadResource(GetCurrentInstance(), h));
	202	#else
	203	if (h)
	204	fh = AccessResource(GetCurrentInstance(), h);
	205	#endif
	206	}
	207
	208	if (fh == -1)
	209	return NULL;
	210
	211	pdib = DibReadBitmapInfo(fh);
	212
	213	if (!pdib)
	214	return NULL;
	215
	216	/* How much memory do we need to hold the DIB */
	217
	218	dwBits = pdib->biSizeImage;
	219	dwLen = pdib->biSize + DibPaletteSize(pdib) + dwBits;
	220
	221	/* Can we get more memory? */
	222
	223	p = GlobalReAllocPtr(pdib,dwLen,0);
	224
	225	if (!p)
	226	{
	227	GlobalFreePtr(pdib);
	228	pdib = NULL;
	229	}
	230	else
	231	{
	232	pdib = (PDIB)p;
	233	}
	234
	235	if (pdib)
	236	{
	237	/* read in the bits */
	238	_hread(fh, (LPBYTE)pdib + (UINT)pdib->biSize + DibPaletteSize(pdib), dwBits);
	239	}
	240
	241	_lclose(fh);
	242
	243	return pdib;
	244	}
	245
	246
	247	/*
	248	* ReadDibBitmapInfo()
	249	*
	250	* Will read a file in DIB format and return a global HANDLE to its
	251	* BITMAPINFO. This function will work with both "old" and "new"
	252	* bitmap formats, but will always return a "new" BITMAPINFO.
	253	*/
	254
	255	PDIB DibReadBitmapInfo(HFILE fh)
	256	{
	257	DWORD off;
	258	int size;
	259	int i;
	260	int nNumColors;
	261
	262	RGBQUAD FAR *pRgb;
	263	BITMAPINFOHEADER bi;
	264	BITMAPCOREHEADER bc;
	265	BITMAPFILEHEADER bf;
	266	PDIB pdib;
	267
	268	if (fh == -1)
	269	return NULL;
	270
	271	off = _llseek(fh,0L,SEEK_CUR);
	272
	273	if (sizeof(bf) != _lread(fh,(LPSTR)&bf,sizeof(bf)))
	274	return FALSE;
	275
	276	/*
	277	* do we have a RC HEADER?
	278	*/
	279	if (bf.bfType != BFT_BITMAP)
	280	{
	281	bf.bfOffBits = 0L;
	282	_llseek(fh,off,SEEK_SET);
	283	}
	284
	285	if (sizeof(bi) != _lread(fh,(LPSTR)&bi,sizeof(bi)))
	286	return FALSE;
	287
	288	/*
	289	* what type of bitmap info is this?
	290	*/
	291	switch (size = (int)bi.biSize)
	292	{
	293	default:
	294	case sizeof(BITMAPINFOHEADER):
	295	break;
	296
	297	case sizeof(BITMAPCOREHEADER):
	298	bc = (BITMAPCOREHEADER)&bi;
	299	bi.biSize = sizeof(BITMAPINFOHEADER);
	300	bi.biWidth = (DWORD)bc.bcWidth;
	301	bi.biHeight = (DWORD)bc.bcHeight;
	302	bi.biPlanes = (UINT)bc.bcPlanes;
	303	bi.biBitCount = (UINT)bc.bcBitCount;
	304	bi.biCompression = BI_RGB;
	305	bi.biSizeImage = 0;
	306	bi.biXPelsPerMeter = 0;
	307	bi.biYPelsPerMeter = 0;
	308	bi.biClrUsed = 0;
	309	bi.biClrImportant = 0;
	310
	311	_llseek(fh,(LONG)sizeof(BITMAPCOREHEADER)-sizeof(BITMAPINFOHEADER),SEEK_CUR);
	312
	313	break;
	314	}
	315
	316	nNumColors = DibNumColors(&bi);
	317
	318	#if 0
	319	if (bi.biSizeImage == 0)
	320	bi.biSizeImage = DibSizeImage(&bi);
	321
	322	if (bi.biClrUsed == 0)
	323	bi.biClrUsed = DibNumColors(&bi);
	324	#else
	325	FixBitmapInfo(&bi);
	326	#endif
	327
	328	pdib = (PDIB)GlobalAllocPtr(GMEM_MOVEABLE,(LONG)bi.biSize + nNumColors * sizeof(RGBQUAD));
	329
	330	if (!pdib)
	331	return NULL;
	332
	333	*pdib = bi;
	334
	335	pRgb = DibColors(pdib);
	336
	337	if (nNumColors)
	338	{
	339	if (size == sizeof(BITMAPCOREHEADER))
	340	{
	341	/*
	342	* convert a old color table (3 byte entries) to a new
	343	* color table (4 byte entries)
	344	*/
	345	_lread(fh,(LPVOID)pRgb,nNumColors * sizeof(RGBTRIPLE));
	346
	347	for (i=nNumColors-1; i>=0; i--)
	348	{
	349	RGBQUAD rgb;
	350
	351	rgb.rgbRed = ((RGBTRIPLE FAR *)pRgb)[i].rgbtRed;
	352	rgb.rgbBlue = ((RGBTRIPLE FAR *)pRgb)[i].rgbtBlue;
	353	rgb.rgbGreen = ((RGBTRIPLE FAR *)pRgb)[i].rgbtGreen;
	354	rgb.rgbReserved = (BYTE)0;
	355
	356	pRgb[i] = rgb;
	357	}
	358	}
	359	else
	360	{
	361	_lread(fh,(LPVOID)pRgb,nNumColors * sizeof(RGBQUAD));
	362	}
	363	}
	364
	365	if (bf.bfOffBits != 0L)
	366	_llseek(fh,off + bf.bfOffBits,SEEK_SET);
	367
	368	return pdib;
	369	}
	370
	371	/*
	372	* DibSetUsage(hdib,hpal,wUsage)
	373	*
	374	* Modifies the color table of the passed DIB for use with the wUsage
	375	* parameter specifed.
	376	*
	377	* if wUsage is DIB_PAL_COLORS the DIB color table is set to 0-256
	378	* if wUsage is DIB_RGB_COLORS the DIB color table is set to the RGB values
	379	* in the passed palette
	380	*/
	381
	382	BOOL DibSetUsage(PDIB pdib, HPALETTE hpal,UINT wUsage)
	383	{
	384	PALETTEENTRY ape[256];
	385	RGBQUAD FAR * pRgb;
	386	WORD FAR * pw;
	387	int nColors;
	388	int n;
	389
	390	if (hpal == NULL)
	391	hpal = (HPALETTE)GetStockObject(DEFAULT_PALETTE);
	392
	393	if (!pdib)
	394	return FALSE;
	395
	396	nColors = DibNumColors(pdib);
	397
	398	if (nColors == 3 && DibCompression(pdib) == BI_BITFIELDS)
	399	nColors = 0;
	400
	401	if (nColors > 0)
	402	{
	403	pRgb = DibColors(pdib);
	404
	405	switch (wUsage)
	406	{
	407	//
	408	// Set the DIB color table to palette indexes
	409	//
	410	case DIB_PAL_COLORS:
	411	for (pw = (WORD FAR*)pRgb,n=0; n<nColors; n++,pw++)
	412	*pw = n;
	413	break;
	414
	415	//
	416	// Set the DIB color table to RGBQUADS
	417	//
	418	default:
	419	case DIB_RGB_COLORS:
	420	nColors = (nColors < 256) ? nColors: 256;
	421
	422	GetPaletteEntries(hpal,0,nColors,ape);
	423
	424	for (n=0; n<nColors; n++)
	425	{
	426	pRgb[n].rgbRed = ape[n].peRed;
	427	pRgb[n].rgbGreen = ape[n].peGreen;
	428	pRgb[n].rgbBlue = ape[n].peBlue;
	429	pRgb[n].rgbReserved = 0;
	430	}
	431	break;
	432	}
	433	}
	434	return TRUE;
	435	}
	436
	437	/*
	438	* DibCreate(bits, dx, dy)
	439	*
	440	* Creates a new packed DIB with the given dimensions and the
	441	* given number of bits per pixel
	442	*/
	443
	444	PDIB DibCreate(int bits, int dx, int dy)
	445	{
	446	LPBITMAPINFOHEADER lpbi ;
	447	DWORD dwSizeImage;
	448	int i;
	449	DWORD FAR *pdw;
	450
	451	dwSizeImage = dy(DWORD)((dxbits/8+3)&~3);
	452
	453	lpbi = (PDIB)GlobalAllocPtr(GHND,sizeof(BITMAPINFOHEADER)+dwSizeImage + 1024);
	454
	455	if (lpbi == NULL)
	456	return NULL;
	457
	458	lpbi->biSize = sizeof(BITMAPINFOHEADER) ;
	459	lpbi->biWidth = dx;
	460	lpbi->biHeight = dy;
	461	lpbi->biPlanes = 1;
	462	lpbi->biBitCount = bits ;
	463	lpbi->biCompression = BI_RGB ;
	464	lpbi->biSizeImage = dwSizeImage;
	465	lpbi->biXPelsPerMeter = 0 ;
	466	lpbi->biYPelsPerMeter = 0 ;
	467	lpbi->biClrUsed = 0 ;
	468	lpbi->biClrImportant = 0 ;
	469
	470	if (bits == 4)
	471	lpbi->biClrUsed = 16;
	472
	473	else if (bits == 8)
	474	lpbi->biClrUsed = 256;
	475
	476	pdw = (DWORD FAR *)((LPBYTE)lpbi+(int)lpbi->biSize);
	477
	478	for (i=0; i<(int)lpbi->biClrUsed/16; i++)
	479	{
	480	*pdw++ = 0x00000000; // 0000 black
	481	*pdw++ = 0x00800000; // 0001 dark red
	482	*pdw++ = 0x00008000; // 0010 dark green
	483	*pdw++ = 0x00808000; // 0011 mustard
	484	*pdw++ = 0x00000080; // 0100 dark blue
	485	*pdw++ = 0x00800080; // 0101 purple
	486	*pdw++ = 0x00008080; // 0110 dark turquoise
	487	*pdw++ = 0x00C0C0C0; // 1000 gray
	488	*pdw++ = 0x00808080; // 0111 dark gray
	489	*pdw++ = 0x00FF0000; // 1001 red
	490	*pdw++ = 0x0000FF00; // 1010 green
	491	*pdw++ = 0x00FFFF00; // 1011 yellow
	492	*pdw++ = 0x000000FF; // 1100 blue
	493	*pdw++ = 0x00FF00FF; // 1101 pink (magenta)
	494	*pdw++ = 0x0000FFFF; // 1110 cyan
	495	*pdw++ = 0x00FFFFFF; // 1111 white
	496	}
	497
	498	return (PDIB)lpbi;
	499	}
	500
	501	static void xlatClut8(BYTE FAR pb, DWORD dwSize, BYTE FAR xlat)
	502	{
	503	DWORD dw;
	504
	505	#ifdef __cplusplus
	506	for (dw = 0; dw < dwSize; dw++, ((BYTE _huge *&)pb)++)
	507	#else
	508	for (dw = 0; dw < dwSize; dw++, ((BYTE _huge *)pb)++)
	509	#endif
	510	pb = xlat[pb];
	511	}
	512
	513	static void xlatClut4(BYTE FAR pb, DWORD dwSize, BYTE FAR xlat)
	514	{
	515	DWORD dw;
	516
	517	#ifdef __cplusplus
	518	for (dw = 0; dw < dwSize; dw++, ((BYTE _huge *&)pb)++)
	519	#else
	520	for (dw = 0; dw < dwSize; dw++, ((BYTE _huge *)pb)++)
	521	#endif
	522	pb = (BYTE)(xlat[pb & 0x0F] \| (xlat[(*pb >> 4) & 0x0F] << 4));
	523	}
	524
	525	#define RLE_ESCAPE 0
	526	#define RLE_EOL 0
	527	#define RLE_EOF 1
	528	#define RLE_JMP 2
	529
	530	static void xlatRle8(BYTE FAR pb, DWORD dwSize, BYTE FAR xlat)
	531	{
	532	BYTE cnt;
	533	BYTE b;
	534	BYTE _huge *prle = pb;
	535
	536	for(;;)
	537	{
	538	cnt = *prle++;
	539	b = *prle;
	540
	541	if (cnt == RLE_ESCAPE)
	542	{
	543	prle++;
	544
	545	switch (b)
	546	{
	547	case RLE_EOF:
	548	return;
	549
	550	case RLE_EOL:
	551	break;
	552
	553	case RLE_JMP:
	554	prle++; // skip dX
	555	prle++; // skip dY
	556	break;
	557
	558	default:
	559	cnt = b;
	560	for (b=0; b<cnt; b++,prle++)
	561	prle = xlat[prle];
	562
	563	if (cnt & 1)
	564	prle++;
	565
	566	break;
	567	}
	568	}
	569	else
	570	{
	571	*prle++ = xlat[b];
	572	}
	573	}
	574	}
	575
	576	static void xlatRle4(BYTE FAR pb, DWORD dwSize, BYTE FAR xlat)
	577	{
	578	}
	579
	580	static void hmemmove(BYTE _huge d, BYTE _huge s, LONG len)
	581	{
	582	d += len-1;
	583	s += len-1;
	584
	585	while (len--)
	586	d-- = s--;
	587	}
	588
	589	/*
	590	* DibMapToPalette(pdib, hpal)
	591	*
	592	* Map the colors of the DIB, using GetNearestPaletteIndex, to
	593	* the colors of the given palette.
	594	*/
	595
	596	BOOL DibMapToPalette(PDIB pdib, HPALETTE hpal)
	597	{
	598	LPBITMAPINFOHEADER lpbi;
	599	PALETTEENTRY pe;
	600	int n;
	601	int nDibColors;
	602	int nPalColors=0;
	603	BYTE FAR * lpBits;
	604	RGBQUAD FAR * lpRgb;
	605	BYTE xlat[256];
	606	DWORD SizeImage;
	607
	608	if (!hpal \|\| !pdib)
	609	return FALSE;
	610
	611	lpbi = (LPBITMAPINFOHEADER)pdib;
	612	lpRgb = DibColors(pdib);
	613
	614	GetObject(hpal,sizeof(int),(LPSTR)&nPalColors);
	615	nDibColors = DibNumColors(pdib);
	616
	617	if ((SizeImage = lpbi->biSizeImage) == 0)
	618	SizeImage = DibSizeImage(lpbi);
	619
	620	//
	621	// build a xlat table. from the current DIB colors to the given
	622	// palette.
	623	//
	624	for (n=0; n<nDibColors; n++)
	625	xlat[n] = (BYTE)GetNearestPaletteIndex(hpal,RGB(lpRgb[n].rgbRed,lpRgb[n].rgbGreen,lpRgb[n].rgbBlue));
	626
	627	lpBits = (LPBYTE)DibPtr(lpbi);
	628	lpbi->biClrUsed = nPalColors;
	629
	630	//
	631	// re-size the DIB
	632	//
	633	if (nPalColors > nDibColors)
	634	{
	635	GlobalReAllocPtr(lpbi, lpbi->biSize + nPalColors*sizeof(RGBQUAD) + SizeImage, 0);
	636	hmemmove((BYTE _huge )DibPtr(lpbi), (BYTE _huge )lpBits, SizeImage);
	637	lpBits = (LPBYTE)DibPtr(lpbi);
	638	}
	639	else if (nPalColors < nDibColors)
	640	{
	641	hmemcpy(DibPtr(lpbi), lpBits, SizeImage);
	642	GlobalReAllocPtr(lpbi, lpbi->biSize + nPalColors*sizeof(RGBQUAD) + SizeImage, 0);
	643	lpBits = (LPBYTE)DibPtr(lpbi);
	644	}
	645
	646	//
	647	// translate the DIB bits
	648	//
	649	switch (lpbi->biCompression)
	650	{
	651	case BI_RLE8:
	652	xlatRle8(lpBits, SizeImage, xlat);
	653	break;
	654
	655	case BI_RLE4:
	656	xlatRle4(lpBits, SizeImage, xlat);
	657	break;
	658
	659	case BI_RGB:
	660	if (lpbi->biBitCount == 8)
	661	xlatClut8(lpBits, SizeImage, xlat);
	662	else
	663	xlatClut4(lpBits, SizeImage, xlat);
	664	break;
	665	}
	666
	667	//
	668	// Now copy the RGBs in the logical palette to the dib color table
	669	//
	670	for (n=0; n<nPalColors; n++)
	671	{
	672	GetPaletteEntries(hpal,n,1,&pe);
	673
	674	lpRgb[n].rgbRed = pe.peRed;
	675	lpRgb[n].rgbGreen = pe.peGreen;
	676	lpRgb[n].rgbBlue = pe.peBlue;
	677	lpRgb[n].rgbReserved = (BYTE)0;
	678	}
	679
	680	return TRUE;
	681	}
	682
	683
	684	HPALETTE MakePalette(const BITMAPINFO FAR* Info, UINT flags)
	685	{
	686	HPALETTE hPalette;
	687	const RGBQUAD far* rgb = Info->bmiColors;
	688
	689	WORD nColors = Info->bmiHeader.biClrUsed;
	690	if (nColors) {
	691	LOGPALETTE* logPal = (LOGPALETTE*)
	692	new BYTE[sizeof(LOGPALETTE) + (nColors-1)*sizeof(PALETTEENTRY)];
	693
	694	logPal->palVersion = 0x300; // Windows 3.0 version
	695	logPal->palNumEntries = nColors;
	696	for (short n = 0; n < nColors; n++) {
	697	logPal->palPalEntry[n].peRed = rgb[n].rgbRed;
	698	logPal->palPalEntry[n].peGreen = rgb[n].rgbGreen;
	699	logPal->palPalEntry[n].peBlue = rgb[n].rgbBlue;
	700	logPal->palPalEntry[n].peFlags = (BYTE)flags;
	701	}
	702	hPalette = ::CreatePalette(logPal);
	703	delete logPal;
	704	} else
	705	hPalette = 0;
	706
	707	return hPalette;
	708	}
	709