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windows-nt/Source/XPSP1/NT/multimedia/media/deluxe2/main/dib.cpp

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2020-09-26 03:20:57 -05:00
/*----------------------------------------------------------------------------*\
| Routines for dealing with Device independent bitmaps |
| |
| History: |
| 06/23/89 toddla Created |
| |
\*----------------------------------------------------------------------------*/
#include <windows.h>
#include "dib.h"
#define HUGE_T
HANDLE CreateLogicalDib(HBITMAP hbm, WORD biBits, HPALETTE hpal);
static DWORD NEAR PASCAL lread(HFILE fh, VOID FAR *pv, DWORD ul);
static DWORD NEAR PASCAL lwrite(HFILE fh, VOID FAR *pv, DWORD ul);
/* flags for _lseek */
#define SEEK_CUR 1
#define SEEK_END 2
#define SEEK_SET 0
/*
* Open a DIB file and return a MEMORY DIB, a memory handle containing..
*
* BITMAP INFO bi
* palette data
* bits....
*
*/
HANDLE OpenDIB(LPTSTR szFile, HFILE fh)
{
BITMAPINFOHEADER bi;
LPBITMAPINFOHEADER lpbi;
DWORD dwLen;
DWORD dwBits;
HANDLE hdib;
HANDLE h;
#ifndef UNICODE
OFSTRUCT of;
#endif
BOOL fOpened = FALSE;
if (szFile != NULL) {
#ifdef UNICODE
fh = (HFILE)HandleToUlong(CreateFile(szFile, GENERIC_READ, FILE_SHARE_READ,
NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL));
#else
fh = OpenFile(szFile, &of, OF_READ);
#endif
fOpened = TRUE;
}
if (fh == (HFILE)-1)
return NULL;
hdib = ReadDibBitmapInfo(fh);
if (!hdib)
return NULL;
DibInfo((LPBITMAPINFOHEADER)GlobalLock(hdib),&bi); GlobalUnlock(hdib);
/* How much memory do we need to hold the DIB */
dwBits = bi.biSizeImage;
dwLen = bi.biSize + PaletteSize(&bi) + dwBits;
/* Can we get more memory? */
h = GlobalReAlloc(hdib,dwLen,GMEM_MOVEABLE);
if (!h)
{
GlobalFree(hdib);
hdib = NULL;
}
else
{
hdib = h;
}
if (hdib)
{
lpbi = (BITMAPINFOHEADER*)GlobalLock(hdib);
/* read in the bits */
lread(fh, (LPBYTE)lpbi + (UINT)lpbi->biSize + PaletteSize(lpbi), dwBits);
GlobalUnlock(hdib);
}
if (fOpened)
_lclose(fh);
return hdib;
}
/*
* Write a global handle in CF_DIB format to a file.
*
*/
BOOL WriteDIB(LPTSTR szFile,HFILE fh, HANDLE hdib)
{
BITMAPFILEHEADER hdr;
LPBITMAPINFOHEADER lpbi;
BITMAPINFOHEADER bi;
DWORD dwSize;
BOOL fOpened = FALSE;
if (!hdib)
return FALSE;
if (szFile != NULL) {
#ifdef UNICODE
fh = (HFILE)HandleToUlong(CreateFile(szFile,GENERIC_WRITE | GENERIC_READ, 0,
NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL));
#else
OFSTRUCT of;
fh = OpenFile(szFile,&of,OF_CREATE|OF_READWRITE);
#endif
fOpened = TRUE;
}
if (fh == (HFILE)-1)
return FALSE;
lpbi = (BITMAPINFOHEADER*)GlobalLock(hdib);
DibInfo(lpbi,&bi);
dwSize = bi.biSize + PaletteSize(&bi) + bi.biSizeImage;
hdr.bfType = BFT_BITMAP;
hdr.bfSize = dwSize + sizeof(BITMAPFILEHEADER);
hdr.bfReserved1 = 0;
hdr.bfReserved2 = 0;
hdr.bfOffBits = (DWORD)sizeof(BITMAPFILEHEADER) + lpbi->biSize +
PaletteSize(lpbi);
_lwrite(fh,(const char*)&hdr,sizeof(BITMAPFILEHEADER));
lwrite(fh,(LPVOID)lpbi,dwSize);
GlobalUnlock(hdib);
if (fOpened)
_lclose(fh);
return TRUE;
}
/*
* DibInfo(hbi, lpbi)
*
* retrives the DIB info associated with a CF_DIB format memory block.
*/
BOOL DibInfo(LPBITMAPINFOHEADER lpbiSource, LPBITMAPINFOHEADER lpbiTarget)
{
if (lpbiSource)
{
*lpbiTarget = *lpbiSource;
if (lpbiTarget->biSize == sizeof(BITMAPCOREHEADER))
{
BITMAPCOREHEADER bc;
bc = *(LPBITMAPCOREHEADER)lpbiTarget;
lpbiTarget->biSize = sizeof(BITMAPINFOHEADER);
lpbiTarget->biWidth = (DWORD)bc.bcWidth;
lpbiTarget->biHeight = (DWORD)bc.bcHeight;
lpbiTarget->biPlanes = (UINT)bc.bcPlanes;
lpbiTarget->biBitCount = (UINT)bc.bcBitCount;
lpbiTarget->biCompression = BI_RGB;
lpbiTarget->biSizeImage = 0;
lpbiTarget->biXPelsPerMeter = 0;
lpbiTarget->biYPelsPerMeter = 0;
lpbiTarget->biClrUsed = 0;
lpbiTarget->biClrImportant = 0;
}
/*
* fill in the default fields
*/
if (lpbiTarget->biSize != sizeof(BITMAPCOREHEADER))
{
if (lpbiTarget->biSizeImage == 0L)
lpbiTarget->biSizeImage = (DWORD)DIBWIDTHBYTES(*lpbiTarget) * lpbiTarget->biHeight;
if (lpbiTarget->biClrUsed == 0L)
lpbiTarget->biClrUsed = DibNumColors(lpbiTarget);
}
return TRUE;
}
return FALSE;
}
HPALETTE CreateColorPalette()
{
LOGPALETTE *pPal;
HPALETTE hpal = NULL;
WORD nNumColors;
BYTE red;
BYTE green;
BYTE blue;
int i;
nNumColors = MAXPALETTE;
pPal = (LOGPALETTE*)LocalAlloc(LPTR,sizeof(LOGPALETTE) + nNumColors * sizeof(PALETTEENTRY));
if (!pPal)
goto exit;
pPal->palNumEntries = nNumColors;
pPal->palVersion = PALVERSION;
red = green = blue = 0;
for (i = 0; i < pPal->palNumEntries; i++)
{
pPal->palPalEntry[i].peRed = red;
pPal->palPalEntry[i].peGreen = green;
pPal->palPalEntry[i].peBlue = blue;
pPal->palPalEntry[i].peFlags = (BYTE)0;
if (!(red += 32))
if (!(green += 32))
blue += 64;
}
hpal = CreatePalette(pPal);
LocalFree((HANDLE)pPal);
exit:
return hpal;
}
/*
* CreateBIPalette()
*
* Given a Pointer to a BITMAPINFO struct will create a
* a GDI palette object from the color table.
*
* works with "old" and "new" DIB's
*
*/
HPALETTE CreateBIPalette(LPBITMAPINFOHEADER lpbi)
{
LOGPALETTE *pPal;
HPALETTE hpal = NULL;
WORD nNumColors;
UINT i;
RGBQUAD FAR *pRgb;
BOOL fCoreHeader;
if (!lpbi)
return NULL;
nNumColors = DibNumColors(lpbi);
if (nNumColors)
{
fCoreHeader = (lpbi->biSize == sizeof(BITMAPCOREHEADER));
pRgb = (RGBQUAD FAR *)((LPBYTE)lpbi + (UINT)lpbi->biSize);
pPal = (LOGPALETTE*)LocalAlloc(LPTR,sizeof(LOGPALETTE) + nNumColors * sizeof(PALETTEENTRY));
if (!pPal)
goto exit;
pPal->palNumEntries = nNumColors;
pPal->palVersion = PALVERSION;
for (i = 0; i < nNumColors; i++)
{
pPal->palPalEntry[i].peRed = pRgb->rgbRed;
pPal->palPalEntry[i].peGreen = pRgb->rgbGreen;
pPal->palPalEntry[i].peBlue = pRgb->rgbBlue;
pPal->palPalEntry[i].peFlags = (BYTE)0;
if (fCoreHeader)
//((LPBYTE)pRgb) += sizeof(RGBTRIPLE) ;
pRgb += sizeof(RGBTRIPLE) ;
else
pRgb++;
}
hpal = CreatePalette(pPal);
LocalFree((HANDLE)pPal);
}
else if (lpbi->biBitCount == 24)
{
hpal = CreateColorPalette();
}
exit:
return hpal;
}
/*
* CreateDibPalette()
*
* Given a Global HANDLE to a BITMAPINFO Struct
* will create a GDI palette object from the color table.
*
* works with "old" and "new" DIB's
*
*/
HPALETTE CreateDibPalette(HANDLE hbi)
{
HPALETTE hpal;
if (!hbi)
return NULL;
hpal = CreateBIPalette((LPBITMAPINFOHEADER)GlobalLock(hbi));
GlobalUnlock(hbi);
return hpal;
}
HPALETTE CreateExplicitPalette()
{
PLOGPALETTE ppal;
HPALETTE hpal;
int i;
#define NPAL 256
ppal = (LOGPALETTE*)LocalAlloc(LPTR,sizeof(LOGPALETTE) + sizeof(PALETTEENTRY) * NPAL);
ppal->palVersion = 0x300;
ppal->palNumEntries = NPAL;
for (i=0; i<NPAL; i++)
{
ppal->palPalEntry[i].peFlags = (BYTE)PC_EXPLICIT;
ppal->palPalEntry[i].peRed = (BYTE)i;
ppal->palPalEntry[i].peGreen = (BYTE)0;
ppal->palPalEntry[i].peBlue = (BYTE)0;
}
hpal = CreatePalette(ppal);
LocalFree((HANDLE)ppal);
return hpal;
}
/*
* ReadDibBitmapInfo()
*
* Will read a file in DIB format and return a global HANDLE to it's
* BITMAPINFO. This function will work with both "old" and "new"
* bitmap formats, but will always return a "new" BITMAPINFO
*
*/
HANDLE ReadDibBitmapInfo(HFILE fh)
{
DWORD off;
HANDLE hbi = NULL;
int size;
int i;
UINT nNumColors;
RGBQUAD FAR *pRgb;
BITMAPINFOHEADER bi;
BITMAPCOREHEADER bc;
LPBITMAPINFOHEADER lpbi;
BITMAPFILEHEADER bf;
if (fh == (HFILE)-1)
return NULL;
off = _llseek(fh,0L,SEEK_CUR);
if (sizeof(bf) != _lread(fh,(LPBYTE)&bf,sizeof(bf)))
return FALSE;
/*
* do we have a RC HEADER?
*/
if (!ISDIB(bf.bfType))
{
bf.bfOffBits = 0L;
_llseek(fh,off,SEEK_SET);
}
if (sizeof(bi) != _lread(fh,(LPBYTE)&bi,sizeof(bi)))
return FALSE;
nNumColors = DibNumColors(&bi);
/*
* what type of bitmap info is this?
*/
switch (size = (int)bi.biSize)
{
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 = nNumColors;
bi.biClrImportant = nNumColors;
_llseek(fh,(LONG)sizeof(BITMAPCOREHEADER)-sizeof(BITMAPINFOHEADER),SEEK_CUR);
break;
default:
return NULL; /* not a DIB */
}
/*
* fill in some default values!
*/
if (bi.biSizeImage == 0)
{
bi.biSizeImage = (DWORD)DIBWIDTHBYTES(bi) * bi.biHeight;
}
if (bi.biXPelsPerMeter == 0)
{
bi.biXPelsPerMeter = 0; // ??????????????
}
if (bi.biYPelsPerMeter == 0)
{
bi.biYPelsPerMeter = 0; // ??????????????
}
if (bi.biClrUsed == 0)
{
bi.biClrUsed = DibNumColors(&bi);
}
hbi = GlobalAlloc(GMEM_MOVEABLE,(LONG)bi.biSize + nNumColors * sizeof(RGBQUAD));
if (!hbi)
return NULL;
lpbi = (BITMAPINFOHEADER *)GlobalLock(hbi);
*lpbi = bi;
pRgb = (RGBQUAD FAR *)((LPBYTE)lpbi + bi.biSize);
if (nNumColors)
{
if (size == (int)sizeof(BITMAPCOREHEADER))
{
/*
* convert a old color table (3 byte entries) to a new
* color table (4 byte entries)
*/
_lread(fh,(LPBYTE)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,(LPBYTE)pRgb,nNumColors * sizeof(RGBQUAD));
}
}
if (bf.bfOffBits != 0L)
_llseek(fh,off + bf.bfOffBits,SEEK_SET);
GlobalUnlock(hbi);
return hbi;
}
/* How big is the palette? if bits per pel not 24
* no of bytes to read is 6 for 1 bit, 48 for 4 bits
* 256*3 for 8 bits and 0 for 24 bits
*/
UINT PaletteSize(VOID FAR * pv)
{
#define lpbi ((LPBITMAPINFOHEADER)pv)
#define lpbc ((LPBITMAPCOREHEADER)pv)
UINT NumColors;
NumColors = DibNumColors(lpbi);
if (lpbi->biSize == sizeof(BITMAPCOREHEADER))
return NumColors * sizeof(RGBTRIPLE);
else
return NumColors * sizeof(RGBQUAD);
#undef lpbi
#undef lpbc
}
/* How Many colors does this DIB have?
* this will work on both PM and Windows bitmap info structures.
*/
WORD DibNumColors(VOID FAR * pv)
{
#define lpbi ((LPBITMAPINFOHEADER)pv)
#define lpbc ((LPBITMAPCOREHEADER)pv)
int bits;
/*
* with the new format headers, the size of the palette is in biClrUsed
* else is dependent on bits per pixel
*/
if (lpbi->biSize != sizeof(BITMAPCOREHEADER))
{
if (lpbi->biClrUsed != 0)
return (UINT)lpbi->biClrUsed;
bits = lpbi->biBitCount;
}
else
{
bits = lpbc->bcBitCount;
}
switch (bits)
{
case 1:
return 2;
case 4:
return 16;
case 8:
return 256;
default:
return 0;
}
#undef lpbi
#undef lpbc
}
/*
* DibFromBitmap()
*
* Will create a global memory block in DIB format that represents the DDB
* passed in
*
*/
HANDLE DibFromBitmap(HBITMAP hbm, DWORD biStyle, WORD biBits, HPALETTE hpal, UINT wUsage)
{
BITMAP bm;
BITMAPINFOHEADER bi;
BITMAPINFOHEADER FAR *lpbi;
DWORD dwLen;
int nColors;
HANDLE hdib;
HANDLE h;
HDC hdc;
if (wUsage == 0)
wUsage = DIB_RGB_COLORS;
if (!hbm)
return NULL;
#if 0
if (biStyle == BI_RGB && wUsage == DIB_RGB_COLORS)
return CreateLogicalDib(hbm,biBits,hpal);
#endif
if (hpal == NULL)
hpal = (HPALETTE)GetStockObject(DEFAULT_PALETTE);
GetObject(hbm,sizeof(bm),(LPBYTE)&bm);
#ifdef WIN32
nColors = 0; // GetObject only stores two bytes
#endif
GetObject(hpal,sizeof(nColors),(LPBYTE)&nColors);
if (biBits == 0)
biBits = bm.bmPlanes * bm.bmBitsPixel;
bi.biSize = sizeof(BITMAPINFOHEADER);
bi.biWidth = bm.bmWidth;
bi.biHeight = bm.bmHeight;
bi.biPlanes = 1;
bi.biBitCount = biBits;
bi.biCompression = biStyle;
bi.biSizeImage = 0;
bi.biXPelsPerMeter = 0;
bi.biYPelsPerMeter = 0;
bi.biClrUsed = 0;
bi.biClrImportant = 0;
dwLen = bi.biSize + PaletteSize(&bi);
hdc = CreateCompatibleDC(NULL);
hpal = SelectPalette(hdc,hpal,TRUE);
RealizePalette(hdc); // why is this needed on a MEMORY DC? GDI bug??
hdib = GlobalAlloc(GMEM_MOVEABLE,dwLen);
if (!hdib)
goto exit;
lpbi = (BITMAPINFOHEADER*)GlobalLock(hdib);
*lpbi = bi;
/*
* call GetDIBits with a NULL lpBits param, so it will calculate the
* biSizeImage field for us
*/
GetDIBits(hdc, hbm, 0, (UINT)bi.biHeight,
NULL, (LPBITMAPINFO)lpbi, wUsage);
bi = *lpbi;
GlobalUnlock(hdib);
/*
* HACK! if the driver did not fill in the biSizeImage field, make one up
*/
if (bi.biSizeImage == 0)
{
bi.biSizeImage = (DWORD)WIDTHBYTES(bm.bmWidth * biBits) * bm.bmHeight;
if (biStyle != BI_RGB)
bi.biSizeImage = (bi.biSizeImage * 3) / 2;
}
/*
* realloc the buffer big enough to hold all the bits
*/
dwLen = bi.biSize + PaletteSize(&bi) + bi.biSizeImage;
if (h = GlobalReAlloc(hdib,dwLen,GMEM_MOVEABLE))
{
hdib = h;
}
else
{
GlobalFree(hdib);
hdib = NULL;
goto exit;
}
/*
* call GetDIBits with a NON-NULL lpBits param, and actualy get the
* bits this time
*/
lpbi = (BITMAPINFOHEADER*)GlobalLock(hdib);
GetDIBits(hdc, hbm, 0, (UINT)bi.biHeight,
(LPBYTE)lpbi + (UINT)lpbi->biSize + PaletteSize(lpbi),
(LPBITMAPINFO)lpbi, wUsage);
bi = *lpbi;
lpbi->biClrUsed = DibNumColors(lpbi) ;
GlobalUnlock(hdib);
exit:
SelectPalette(hdc,hpal,TRUE);
DeleteDC(hdc);
return hdib;
}
/*
* BitmapFromDib()
*
* Will create a DDB (Device Dependent Bitmap) given a global handle to
* a memory block in CF_DIB format
*
*/
HBITMAP BitmapFromDib(HANDLE hdib, HPALETTE hpal, UINT wUsage)
{
LPBITMAPINFOHEADER lpbi;
HPALETTE hpalT;
HDC hdc;
HBITMAP hbm;
#if 0
UINT dx,dy,bits;
#endif
if (!hdib)
return NULL;
if (wUsage == 0)
wUsage = DIB_RGB_COLORS;
lpbi = (BITMAPINFOHEADER*)GlobalLock(hdib);
if (!lpbi)
return NULL;
hdc = GetDC(NULL);
// hdc = CreateCompatibleDC(NULL);
if (hpal)
{
hpalT = SelectPalette(hdc,hpal,TRUE);
RealizePalette(hdc); // why is this needed on a MEMORY DC? GDI bug??
}
#if 0
if (lpbi->biSize == sizeof(BITMAPCOREHEADER))
{
dx = ((LPBITMAPCOREHEADER)lpbi)->bcWidth;
dy = ((LPBITMAPCOREHEADER)lpbi)->bcHeight;
bits = ((LPBITMAPCOREHEADER)lpbi)->bcBitCount;
}
else
{
dx = (UINT)lpbi->biWidth;
dy = (UINT)lpbi->biHeight;
bits = (UINT)lpbi->biBitCount;
}
if (bMonoBitmap /* || bits == 1 */)
{
hbm = CreateBitmap(dx,dy,1,1,NULL);
}
else
{
HDC hdcScreen = GetDC(NULL);
hbm = CreateCompatibleBitmap(hdcScreen,dx,dy);
ReleaseDC(NULL,hdcScreen);
}
if (hbm)
{
if (fErrProp)
SetDIBitsErrProp(hdc,hbm,0,dy,
(LPBYTE)lpbi + lpbi->biSize + PaletteSize(lpbi),
(LPBITMAPINFO)lpbi,wUsage);
else
SetDIBits(hdc,hbm,0,dy,
(LPBYTE)lpbi + lpbi->biSize + PaletteSize(lpbi),
(LPBITMAPINFO)lpbi,wUsage);
}
#else
hbm = CreateDIBitmap(hdc,
(LPBITMAPINFOHEADER)lpbi,
(LONG)CBM_INIT,
(LPBYTE)lpbi + lpbi->biSize + PaletteSize(lpbi),
(LPBITMAPINFO)lpbi,
wUsage );
#endif
if (hpal && hpalT)
SelectPalette(hdc,hpalT,TRUE);
// DeleteDC(hdc);
ReleaseDC(NULL,hdc);
GlobalUnlock(hdib);
return hbm;
}
/*
* DibFromDib()
*
* Will convert a DIB in 1 format to a DIB in the specifed format
*
*/
HANDLE DibFromDib(HANDLE hdib, DWORD biStyle, WORD biBits, HPALETTE hpal, UINT wUsage)
{
BITMAPINFOHEADER bi;
HBITMAP hbm;
BOOL fKillPalette=FALSE;
if (!hdib)
return NULL;
DibInfo((LPBITMAPINFOHEADER)GlobalLock(hdib),&bi); GlobalUnlock(hdib);
/*
* do we have the requested format already?
*/
if (bi.biCompression == biStyle && (UINT)bi.biBitCount == biBits)
return hdib;
if (hpal == NULL)
{
hpal = CreateDibPalette(hdib);
fKillPalette++;
}
hbm = BitmapFromDib(hdib,hpal,wUsage);
if (hbm == NULL)
{
hdib = NULL;
}
else
{
hdib = DibFromBitmap(hbm,biStyle,biBits,hpal,wUsage);
DeleteObject(hbm);
}
if (fKillPalette && hpal)
DeleteObject(hpal);
return hdib;
}
#define MAKEP(sel,off) ((VOID FAR *)MAKELONG(off,sel))
/*
* CreateLogicalDib
*
* Given a DDB and a HPALETTE create a "logical" DIB
*
* if the HBITMAP is NULL create a DIB from the system "stock" bitmap
* This is used to save a logical palette to a disk file as a DIB
*
* if the HPALETTE is NULL use the system "stock" palette (ie the
* system palette)
*
* a "logical" DIB is a DIB where the DIB color table *exactly* matches
* the passed logical palette. There will be no system colors in the DIB
* block, and a pixel value of <n> in the DIB will correspond to logical
* palette index <n>.
*
* This is accomplished by doing a GetDIBits() with the DIB_PAL_COLORS
* option then converting the palindexes returned in the color table
* from palette indexes to logical RGB values. The entire passed logical
* palette is always copied to the DIB color table.
*
* The DIB color table will have exactly the same number of entries as
* the logical palette. Normaly GetDIBits() will always set biClrUsed to
* the maximum colors supported by the device regardless of the number of
* colors in the logical palette
*
* Why would you want to do this? The major reason for a "logical" DIB
* is so when the DIB is written to a disk file then reloaded the logical
* palette created from the DIB color table will be the same as one used
* originaly to create the bitmap. It also will prevent GDI from doing
* nearest color matching on PC_RESERVED palettes.
*
* ** What do we do if the logical palette has more than 256 entries!!!!!
* ** GetDIBits() may return logical palette index's that are greater than
* ** 256, we cant represent these colors in the "logical" DIB
* **
* ** for now hose the caller?????
*
*/
HANDLE CreateLogicalDib(HBITMAP hbm, WORD biBits, HPALETTE hpal)
{
BITMAP bm;
BITMAPINFOHEADER bi;
LPBITMAPINFOHEADER lpDib; // pointer to DIB
LPBITMAPINFOHEADER lpbi; // temp pointer to BITMAPINFO
DWORD dwLen;
DWORD dw;
int n;
int nColors;
HANDLE hdib;
HDC hdc;
BYTE FAR * lpBits;
UINT FAR * lpCT;
RGBQUAD FAR * lpRgb;
PALETTEENTRY peT;
HPALETTE hpalT;
if (hpal == NULL)
hpal = (HPALETTE)GetStockObject(DEFAULT_PALETTE);
if (hbm == NULL)
hbm = NULL; // ????GetStockObject(STOCK_BITMAP);
#ifdef WIN32
nColors = 0; // GetObject only stores two bytes
#endif
GetObject(hpal,sizeof(nColors),(LPBYTE)&nColors);
GetObject(hbm,sizeof(bm),(LPBYTE)&bm);
if (biBits == 0)
biBits = nColors > 16 ? 8 : 4;
/*
if (nColors > 256) // ACK!
; // How do we handle this????
*/
bi.biSize = sizeof(BITMAPINFOHEADER);
bi.biWidth = bm.bmWidth;
bi.biHeight = bm.bmHeight;
bi.biPlanes = 1;
bi.biBitCount = biBits;
bi.biCompression = BI_RGB;
bi.biSizeImage = (DWORD)WIDTHBYTES(bm.bmWidth * biBits) * bm.bmHeight;
bi.biXPelsPerMeter = 0;
bi.biYPelsPerMeter = 0;
bi.biClrUsed = nColors;
bi.biClrImportant = 0;
dwLen = bi.biSize + PaletteSize(&bi) + bi.biSizeImage;
hdib = GlobalAlloc(GMEM_MOVEABLE,dwLen);
if (!hdib)
return NULL;
lpbi = (BITMAPINFOHEADER*)MAKEP(GlobalAlloc(GMEM_FIXED,bi.biSize + 256 * sizeof(RGBQUAD)),0);
if (!lpbi)
{
GlobalFree(hdib);
return NULL;
}
hdc = GetDC(NULL);
hpalT = SelectPalette(hdc,hpal,TRUE);
RealizePalette(hdc); // why is this needed on a MEMORY DC? GDI bug??
lpDib = (BITMAPINFOHEADER*)GlobalLock(hdib);
*lpbi = bi;
*lpDib = bi;
lpCT = (UINT FAR *)((LPBYTE)lpbi + (UINT)lpbi->biSize);
lpRgb = (RGBQUAD FAR *)((LPBYTE)lpDib + (UINT)lpDib->biSize);
lpBits = (LPBYTE)lpDib + (UINT)lpDib->biSize + PaletteSize(lpDib);
/*
* call GetDIBits to get the DIB bits and fill the color table with
* logical palette index's
*/
GetDIBits(hdc, hbm, 0, (UINT)bi.biHeight,
lpBits,(LPBITMAPINFO)lpbi, DIB_PAL_COLORS);
/*
* Now convert the DIB bits into "real" logical palette index's
*
* lpCT points to the DIB color table wich is a UINT array of
* logical palette index's
*
* lpBits points to the DIB bits, each DIB pixel is a index into
* the DIB color table.
*
*/
if (biBits == 8)
{
for (dw = 0; dw < bi.biSizeImage; dw++, ((BYTE HUGE_T *)lpBits)++)
*lpBits = (BYTE)lpCT[*lpBits];
}
else // biBits == 4
{
for (dw = 0; dw < bi.biSizeImage; dw++, ((BYTE HUGE_T *)lpBits)++)
*lpBits = lpCT[*lpBits & 0x0F] | (lpCT[(*lpBits >> 4) & 0x0F] << 4);
}
/*
* Now copy the RGBs in the logical palette to the dib color table
*/
for (n=0; n<nColors; n++,lpRgb++)
{
GetPaletteEntries(hpal,n,1,&peT);
lpRgb->rgbRed = peT.peRed;
lpRgb->rgbGreen = peT.peGreen;
lpRgb->rgbBlue = peT.peBlue;
lpRgb->rgbReserved = (BYTE)0;
}
GlobalUnlock(hdib);
#ifdef WIN32
GlobalFree(GlobalHandle(lpbi));
#else
GlobalFree(SELECTOROF(lpbi));
#endif
SelectPalette(hdc,hpalT,TRUE);
ReleaseDC(NULL,hdc);
return hdib;
}
/*
* Draws bitmap <hbm> at the specifed position in DC <hdc>
*
*/
BOOL StretchBitmap(HDC hdc, int x, int y, int dx, int dy, HBITMAP hbm, int x0, int y0, int dx0, int dy0, DWORD rop)
{
HDC hdcBits;
HPALETTE hpal,hpalT;
BOOL f;
if (!hdc || !hbm)
return FALSE;
hpal = SelectPalette(hdc,(HPALETTE)GetStockObject(DEFAULT_PALETTE),TRUE);
SelectPalette(hdc,hpal,TRUE);
hdcBits = CreateCompatibleDC(hdc);
SelectObject(hdcBits,hbm);
hpalT = SelectPalette(hdcBits,hpal,TRUE);
RealizePalette(hdcBits);
f = StretchBlt(hdc,x,y,dx,dy,hdcBits,x0,y0,dx0,dy0,rop);
SelectPalette(hdcBits,hpalT,TRUE);
DeleteDC(hdcBits);
return f;
}
/*
* Draws bitmap <hbm> at the specifed position in DC <hdc>
*
*/
BOOL DrawBitmap(HDC hdc, int x, int y, HBITMAP hbm, DWORD rop)
{
HDC hdcBits;
BITMAP bm;
BOOL f;
if (!hdc || !hbm)
return FALSE;
hdcBits = CreateCompatibleDC(hdc);
GetObject(hbm,sizeof(BITMAP),(LPBYTE)&bm);
SelectObject(hdcBits,hbm);
f = BitBlt(hdc,x,y,bm.bmWidth,bm.bmHeight,hdcBits,0,0,rop);
DeleteDC(hdcBits);
return f;
}
/*
* SetDibUsage(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 SetDibUsage(HANDLE hdib, HPALETTE hpal,UINT wUsage)
{
LPBITMAPINFOHEADER lpbi;
PALETTEENTRY ape[MAXPALETTE];
RGBQUAD FAR * pRgb;
UINT FAR * pw;
int nColors;
int n;
if (hpal == NULL)
hpal = (HPALETTE)GetStockObject(DEFAULT_PALETTE);
if (!hdib)
return FALSE;
lpbi = (BITMAPINFOHEADER*)GlobalLock(hdib);
if (!lpbi)
return FALSE;
nColors = DibNumColors(lpbi);
if (nColors > 0)
{
pRgb = (RGBQUAD FAR *)((LPBYTE)lpbi + (UINT)lpbi->biSize);
switch (wUsage)
{
//
// Set the DIB color table to palette indexes
//
case DIB_PAL_COLORS:
for (pw = (UINT FAR*)pRgb,n=0; n<nColors; n++,pw++)
*pw = n;
break;
//
// Set the DIB color table to RGBQUADS
//
default:
case DIB_RGB_COLORS:
nColors = min(nColors,MAXPALETTE);
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;
}
}
GlobalUnlock(hdib);
return TRUE;
}
/*
* SetPalFlags(hpal,iIndex, cnt, wFlags)
*
* Modifies the palette flags of all indexs in the range (iIndex - nIndex+cnt)
* to the parameter specifed.
*
*/
BOOL SetPalFlags(HPALETTE hpal, int iIndex, int cntEntries, UINT wFlags)
{
int i;
BOOL f;
HANDLE hpe;
PALETTEENTRY FAR *lppe;
if (hpal == NULL)
return FALSE;
if (cntEntries < 0) {
#ifdef WIN32
cntEntries = 0; // GetObject only stores two bytes
#endif
GetObject(hpal,sizeof(int),(LPBYTE)&cntEntries);
}
hpe = GlobalAlloc(GMEM_MOVEABLE,(LONG)cntEntries * sizeof(PALETTEENTRY));
if (!hpe)
return FALSE;
lppe = (PALETTEENTRY*)GlobalLock(hpe);
GetPaletteEntries(hpal, iIndex, cntEntries, lppe);
for (i=0; i<cntEntries; i++)
{
lppe[i].peFlags = (BYTE)wFlags;
}
f = SetPaletteEntries(hpal, iIndex, cntEntries, lppe);
GlobalUnlock(hpe);
GlobalFree(hpe);
return f;
}
/*
* StretchDibBlt()
*
* draws a bitmap in CF_DIB format, using StretchDIBits()
*
* takes the same parameters as StretchBlt()
*/
BOOL StretchDibBlt(HDC hdc, int x, int y, int dx, int dy, HANDLE hdib, int x0, int y0, int dx0, int dy0, LONG rop, UINT wUsage)
{
LPBITMAPINFOHEADER lpbi;
LPBYTE pBuf;
BOOL f;
if (!hdib)
{
return PatBlt(hdc,x,y,dx,dy,rop);
}
if (wUsage == 0)
{
wUsage = DIB_RGB_COLORS;
}
lpbi = (BITMAPINFOHEADER*)GlobalLock(hdib);
if (!lpbi)
{
return FALSE;
}
if (dx0 == -1 && dy0 == -1)
{
if (lpbi->biSize == sizeof(BITMAPCOREHEADER))
{
dx0 = ((LPBITMAPCOREHEADER)lpbi)->bcWidth;
dy0 = ((LPBITMAPCOREHEADER)lpbi)->bcHeight;
}
else
{
dx0 = (int)lpbi->biWidth;
dy0 = (int)lpbi->biHeight;
}
}
if (dx < 0 && dy < 0)
{
dx = dx0 * (-dx);
dy = dy0 * (-dy);
}
pBuf = (LPBYTE)lpbi + (UINT)lpbi->biSize + PaletteSize(lpbi);
f = StretchDIBits (
hdc,
x,y,
dx,dy,
x0,y0,
dx0,dy0,
pBuf, (LPBITMAPINFO)lpbi,
wUsage,
rop);
GlobalUnlock(hdib);
return f;
}
/*
* DibBlt()
*
* draws a bitmap in CF_DIB format, using SetDIBits to device.
*
* takes the same parameters as BitBlt()
*/
BOOL DibBlt(HDC hdc, int x0, int y0, int dx, int dy, HANDLE hdib, int x1, int y1, LONG rop, UINT wUsage)
{
LPBITMAPINFOHEADER lpbi;
LPBYTE pBuf;
BOOL f;
if (!hdib)
return PatBlt(hdc,x0,y0,dx,dy,rop);
if (wUsage == 0)
wUsage = DIB_RGB_COLORS;
lpbi = (BITMAPINFOHEADER*)GlobalLock(hdib);
if (!lpbi)
return FALSE;
if (dx == -1 && dy == -1)
{
if (lpbi->biSize == sizeof(BITMAPCOREHEADER))
{
dx = ((LPBITMAPCOREHEADER)lpbi)->bcWidth;
dy = ((LPBITMAPCOREHEADER)lpbi)->bcHeight;
}
else
{
dx = (int)lpbi->biWidth;
dy = (int)lpbi->biHeight;
}
}
pBuf = (LPBYTE)lpbi + (UINT)lpbi->biSize + PaletteSize(lpbi);
#if 0
f = SetDIBitsToDevice(hdc, x0, y0, dx, dy,
x1,y1,
x1,
dy,
pBuf, (LPBITMAPINFO)lpbi,
wUsage );
#else
f = StretchDIBits (
hdc,
x0,y0,
dx,dy,
x1,y1,
dx,dy,
pBuf, (LPBITMAPINFO)lpbi,
wUsage,
rop);
#endif
GlobalUnlock(hdib);
return f;
}
LPVOID DibLock(HANDLE hdib,int x, int y)
{
return DibXY((LPBITMAPINFOHEADER)GlobalLock(hdib),x,y);
}
VOID DibUnlock(HANDLE hdib)
{
GlobalUnlock(hdib);
}
LPVOID DibXY(LPBITMAPINFOHEADER lpbi,int x, int y)
{
BYTE HUGE_T *pBits;
DWORD ulWidthBytes;
pBits = (LPBYTE)lpbi + (UINT)lpbi->biSize + PaletteSize(lpbi);
ulWidthBytes = DIBWIDTHBYTES(*lpbi);
pBits += (ulWidthBytes * (long)y) + x;
return (LPVOID)pBits;
}
//
// These are the standard VGA colors, we will be stuck with until the
// end of time!
//
static DWORD CosmicColors[16] = {
0x00000000 // 0000 black
,0x00800000 // 0001 dark red
,0x00008000 // 0010 dark green
,0x00808000 // 0011 mustard
,0x00000080 // 0100 dark blue
,0x00800080 // 0101 purple
,0x00008080 // 0110 dark turquoise
,0x00C0C0C0 // 1000 gray
,0x00808080 // 0111 dark gray
,0x00FF0000 // 1001 red
,0x0000FF00 // 1010 green
,0x00FFFF00 // 1011 yellow
,0x000000FF // 1100 blue
,0x00FF00FF // 1101 pink (magenta)
,0x0000FFFF // 1110 cyan
,0x00FFFFFF // 1111 white
};
HANDLE CreateDib(WORD bits, int dx, int dy)
{
HANDLE hdib;
BITMAPINFOHEADER bi;
LPBITMAPINFOHEADER lpbi;
DWORD FAR * pRgb;
UINT i;
bi.biSize = sizeof(BITMAPINFOHEADER);
bi.biPlanes = 1;
bi.biBitCount = bits;
bi.biWidth = dx;
bi.biHeight = dy;
bi.biCompression = BI_RGB;
bi.biSizeImage = 0;
bi.biXPelsPerMeter = 0;
bi.biYPelsPerMeter = 0;
bi.biClrUsed = 0;
bi.biClrImportant = 0;
bi.biClrUsed = DibNumColors(&bi);
hdib = GlobalAlloc(GMEM_MOVEABLE,sizeof(BITMAPINFOHEADER) +
+ (long)bi.biClrUsed * sizeof(RGBQUAD)
+ (long)DIBWIDTHBYTES(bi) * (long)dy);
if (hdib)
{
lpbi = (BITMAPINFOHEADER*)GlobalLock(hdib);
*lpbi = bi;
pRgb = (unsigned long*)((LPBYTE)lpbi + lpbi->biSize);
//
// setup the color table
//
if (bits == 1)
{
pRgb[0] = CosmicColors[0];
pRgb[1] = CosmicColors[15];
}
else
{
for (i=0; i<bi.biClrUsed; i++)
pRgb[i] = CosmicColors[i % 16];
}
GlobalUnlock(hdib);
}
return hdib;
}
/*
* Private routines to read/write more than 64k
*/
#define MAXREAD (UINT)(32u * 1024)
static DWORD NEAR PASCAL lread(HFILE fh, VOID FAR *pv, DWORD ul)
{
DWORD ulT = ul;
BYTE HUGE_T *hp = (unsigned char*)pv;
while (ul > MAXREAD) {
if (_lread(fh, (LPBYTE)hp, MAXREAD) != MAXREAD)
return 0;
ul -= MAXREAD;
hp += MAXREAD;
}
if (_lread(fh, (LPBYTE)hp, (UINT)ul) != (UINT)ul)
return 0;
return ulT;
}
static DWORD NEAR PASCAL lwrite(HFILE fh, VOID FAR *pv, DWORD ul)
{
DWORD ulT = ul;
BYTE HUGE_T *hp = (unsigned char*)pv;
while (ul > MAXREAD) {
if (_lwrite(fh, (const char*)hp, MAXREAD) != MAXREAD)
return 0;
ul -= MAXREAD;
hp += MAXREAD;
}
if (_lwrite(fh, (const char*)hp, (UINT)ul) != (UINT)ul)
return 0;
return ulT;
}
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