//--------------------------------------------------------------------------//
//--------------------------------------------------------------------------//
void CAGSymImage::LoadDIB(const BITMAPINFOHEADER* pHdr, const BYTE* pBits)
{
Free();
if (pHdr->biCompression == BI_RGB && (pHdr->biBitCount == 1 || pHdr->biBitCount == 4 || pHdr->biBitCount == 8 || pHdr->biBitCount == 24))
{
BITMAPINFOHEADER bi;
bi = *pHdr;
bi.biCompression = BI_RGB;
if (!bi.biSizeImage)
bi.biSizeImage = DibSizeImage(&bi);
if (!bi.biClrUsed)
bi.biClrUsed = DibNumColors(&bi);
if (m_pDIB = (BITMAPINFOHEADER*)malloc(DibSize(&bi)))
{
*m_pDIB = bi;
if (bi.biClrUsed)
memcpy((void*)DibColors(m_pDIB), (void*)DibColors(pHdr), DibPaletteSize(pHdr));
BYTE* pNewBits = (BYTE*)DibPtr(m_pDIB);
const BYTE* pSrcBits;
if (pBits)
pSrcBits = pBits;
else
pSrcBits = (BYTE*)(DibColors(pHdr) + bi.biClrUsed);
memcpy(pNewBits, pSrcBits, bi.biSizeImage);
}
}
}
BOOL W32CheckDibColorIndices(LPBITMAPINFOHEADER lpbmi)
{
WORD i, nColors;
LPWORD lpw = (LPWORD)DibColors(lpbmi);
nColors = DibNumColors(lpbmi);
if (lpbmi->biClrImportant) {
nColors = min(nColors, (WORD)lpbmi->biClrImportant);
}
for (i = 0; i < nColors; ++i) {
if (*lpw++ != i) {
return FALSE;
}
}
LOGDEBUG(LOG_ALWAYS, ("\nUndocumented Dib.Drv behaviour used\n"));
return TRUE;
}
HGLOBAL CPng::PNGToDIB(png_structp png_ptr, png_infop info_ptr)
{
//Read the image
png_read_info(png_ptr, info_ptr);
int nBitDepth = 0;
int nColorType = 0;
png_uint_32 width = 0;
png_uint_32 height = 0;
png_get_IHDR(png_ptr, info_ptr, &width, &height, &nBitDepth, &nColorType, NULL, NULL, NULL);
IMAGE img;
img.width = (LONG)width;
img.height = (LONG)height;
//Determine the type of format
if (nColorType==PNG_COLOR_TYPE_RGB || nColorType==PNG_COLOR_TYPE_RGB_ALPHA)
{
img.pixdepth = 24; // nBitDepth 8, 16
img.palnum = 0;
}
else
{
switch(nBitDepth) // bit depths 1, 2, 4, 8, 16
{
case 2:
img.pixdepth = 4;
break;
case 16:
img.pixdepth = 8;
break;
default:
img.pixdepth = nBitDepth;
}
img.palnum = 1 << img.pixdepth;
}
//Allocate the image struct that will be used to transport file info
if (!AllocImageStruct(&img))
{
longjmp(png_ptr->jmpbuf, 1);
}
//Not sure if we can take advantage of this info in a BMP, thus remove it.
if (nColorType & PNG_COLOR_MASK_ALPHA)
png_set_strip_alpha(png_ptr);
//Set user transform function to deal with a Bitdepth of 2
if (nBitDepth == 2)
{
png_set_user_transform_info(png_ptr, NULL, 4, 1);
png_set_read_user_transform_fn(png_ptr, ConvertTo4BitsPerPix);
}
//Tell libpng to strip 16 bit/color files down to 8 bits/color
if (nBitDepth == 16)
png_set_strip_16(png_ptr);
if (nColorType==PNG_COLOR_TYPE_RGB || nColorType==PNG_COLOR_TYPE_RGB_ALPHA)
{
png_set_bgr(png_ptr);
}
png_read_update_info(png_ptr, info_ptr);
//If palette, get it and fill our img struct
if (img.palnum > 0)
{
if (nColorType == PNG_COLOR_TYPE_PALETTE)
{
png_colorp palette;
int num_palette;
png_get_PLTE(png_ptr, info_ptr, &palette, &num_palette);
if (num_palette > (int)img.palnum)
num_palette = img.palnum;
memset(img.palette, 0, img.palnum * sizeof(png_color));
memcpy(img.palette, palette, num_palette * sizeof(png_color));
}
else
{
int depth = (nBitDepth == 16)? 8 : nBitDepth ;
png_build_grayscale_palette(depth, img.palette);
}
}
png_read_image(png_ptr, img.rowptr);
png_infop end_info = NULL;
png_read_end(png_ptr, end_info);
// Alloc the buffer to be big enough to hold all the bits
DWORD dwLen = (DWORD)sizeof(BITMAPINFOHEADER) + (img.palnum * sizeof(RGBQUAD)) + img.imgbytes;
// Allocate enough memory to hold the entire DIB
HGLOBAL hMemory = ::GlobalAlloc(GMEM_FIXED | GMEM_ZEROINIT, dwLen);
if (!hMemory)
return NULL;
//Begin filling out DIB info
BITMAPINFOHEADER* pDib = (BITMAPINFOHEADER*)::GlobalLock(hMemory);
if (!pDib)
{
::GlobalFree(hMemory);
return NULL;
}
::ZeroMemory(pDib, dwLen);
pDib->biSize = sizeof(BITMAPINFOHEADER);
pDib->biWidth = (DWORD)img.width;
pDib->biHeight = (DWORD)img.height;
pDib->biPlanes = 1;
pDib->biCompression = BI_RGB;
pDib->biXPelsPerMeter = 3937; // 100 pixels/inch
pDib->biYPelsPerMeter = 3937;
pDib->biSizeImage = img.imgbytes;
pDib->biBitCount = img.pixdepth;
pDib->biClrUsed = img.palnum;
if (pDib->biBitCount >= 16)
pDib->biBitCount = 24;
if (pDib->biClrUsed)
{
RGBQUAD* pRgb = DibColors(pDib);
BYTE rgbq[RGBQUAD_SIZE];
PALETTE* pal;
UINT nIndex;
memset(rgbq, 0, sizeof(rgbq));
for (pal = img.palette, nIndex = img.palnum ; nIndex > 0 ; nIndex--, pal++)
{
rgbq[RGBQ_RED] = pal->red;
rgbq[RGBQ_GREEN] = pal->green;
rgbq[RGBQ_BLUE] = pal->blue;
rgbq[RGBQ_RESERVED] = 0;
memcpy((LPVOID)pRgb, rgbq, sizeof(RGBQUAD));
pRgb++;
}
}
memcpy(DibPtr(pDib), img.bmpbits, DibSizeImage(pDib));
FreeImageStruct(&img);
::GlobalUnlock(hMemory);
return hMemory;
}
PDIB DibReadBitmapInfo(int fh)
{
DWORD off;
HANDLE hbi = NULL;
int size;
int i;
int nNumColors;
RGBQUAD FAR *pRgb;
BITMAPINFOHEADER bi;
BITMAPCOREHEADER bc;
BITMAPFILEHEADER bf;
PDIB pdib;
if (fh == -1)
return NULL;
off = lseek(fh,0L,SEEK_CUR);
if (sizeof(bf) != read(fh,(LPSTR)&bf,sizeof(bf)))
return FALSE;
/*
* do we have a RC HEADER?
*/
if (bf.bfType != BFT_BITMAP)
{
bf.bfOffBits = 0L;
lseek(fh,off,SEEK_SET);
}
if (sizeof(bi) != read(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;
lseek(fh,(LONG)sizeof(BITMAPCOREHEADER)-sizeof(BITMAPINFOHEADER),SEEK_CUR);
break;
}
nNumColors = DibNumColors(&bi);
if (bi.biSizeImage == 0)
bi.biSizeImage = DibSizeImage(&bi);
if (bi.biClrUsed == 0)
bi.biClrUsed = DibNumColors(&bi);
pdib = (PDIB) malloc((LONG)bi.biSize + nNumColors * sizeof(RGBQUAD));
if (!pdib)
return NULL;
*pdib = bi;
pRgb = DibColors(pdib);
if (nNumColors == 0)
{
printf("Bitmap has no palette (24 bit)\n", NUM_COLORS, nNumColors);
return NULL;
}
if (nNumColors != NUM_COLORS)
{
printf("Expecting %d color bitmap; found %d colors\n", NUM_COLORS, nNumColors);
return NULL;
}
if (size == sizeof(BITMAPCOREHEADER))
{
/*
* convert a old color table (3 byte entries) to a new
* color table (4 byte entries)
*/
read(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
{
read(fh,(LPVOID)pRgb,nNumColors * sizeof(RGBQUAD));
}
if (bf.bfOffBits != 0L)
lseek(fh,off + bf.bfOffBits,SEEK_SET);
return pdib;
}
HDC W32HandleDibDrv (PVPVOID vpbmi16)
{
HDC hdcMem = NULL;
HBITMAP hbm = NULL;
PVOID pvBits, pvIntelBits;
STACKBMI32 bmi32;
LPBITMAPINFO lpbmi32;
DWORD dwClrUsed,nSize,nAlignmentSpace;
PBITMAPINFOHEADER16 pbmi16;
INT nbmiSize,nBytesWritten;
HANDLE hfile=NULL,hsec=NULL;
ULONG RetVal,OriginalSelLimit,SelectorLimit,OriginalFlags;
PARM16 Parm16;
CHAR pchTempFile[MAX_PATH];
BOOL bRet = FALSE;
PVPVOID vpBase16 = (PVPVOID) ((ULONG) vpbmi16 & 0xffff0000);
if ((hdcMem = W32FindAndLockDibInfo((USHORT)HIWORD(vpbmi16))) != (HDC)NULL) {
return hdcMem;
}
// First create a memory device context compatible to
// the app's current screen
if ((hdcMem = CreateCompatibleDC (NULL)) == NULL) {
LOGDEBUG(LOG_ALWAYS,("\nWOW::W32HandleDibDrv CreateCompatibleDC failed\n"));
return NULL;
}
// Copy bmi16 to bmi32. DIB.DRV only supports DIB_RGB_COLORS
lpbmi32 = CopyBMI16ToBMI32(
vpbmi16,
(LPBITMAPINFO)&bmi32,
(WORD) DIB_RGB_COLORS);
// this hack for Director 4.0 does essentially what WFW does
// if this bitmap is 0 sized, just return an hDC for something simple
if(bmi32.bmiHeader.biSizeImage == 0 &&
(CURRENTPTD()->dwWOWCompatFlagsEx & WOWCFEX_DIBDRVIMAGESIZEZERO)) {
LOGDEBUG(LOG_ALWAYS,("\nWOW::W32HandleDibDrv:Zero biSizeImage, returning memory DC!\n"));
return hdcMem;
}
try {
// Copy the wholething into a temp file. First get a temp file name
if ((nSize = GetTempPath (MAX_PATH, pchTempFile)) == 0 ||
nSize >= MAX_PATH)
goto hdd_err;
if (GetTempFileName (pchTempFile,
"DIB",
0,
pchTempFile) == 0)
goto hdd_err;
if ((hfile = CreateFile (pchTempFile,
GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_WRITE,
NULL,
CREATE_ALWAYS,
(FILE_ATTRIBUTE_NORMAL |
FILE_ATTRIBUTE_TEMPORARY |
FILE_FLAG_DELETE_ON_CLOSE),
NULL)) == INVALID_HANDLE_VALUE) {
LOGDEBUG(LOG_ALWAYS,("\nWOW::W32HandleDibDrv CreateFile failed\n"));
goto hdd_err;
}
// call back to get the size of the global object
// associated with vpbmi16
Parm16.WndProc.wParam = HIWORD(vpbmi16);
CallBack16(RET_GETDIBSIZE,
&Parm16,
0,
(PVPVOID)&SelectorLimit);
Parm16.WndProc.wParam = HIWORD(vpbmi16);
if (SelectorLimit == 0xffffffff || SelectorLimit == 0) {
LOGDEBUG(LOG_ALWAYS,("\nWOW::W32HandleDibDrv Invalid Selector %x\n",HIWORD(vpbmi16)));
goto hdd_err;
}
SelectorLimit++;
OriginalSelLimit = SelectorLimit;
CallBack16(RET_GETDIBFLAGS,
&Parm16,
0,
(PVPVOID)&OriginalFlags);
if (OriginalFlags == 0x4) { //GA_DGROUP
LOGDEBUG(LOG_ALWAYS,("\nWOW::W32HandleDibDrv GA_DGROUP Not Handled\n"));
goto hdd_err;
}
GETVDMPTR(vpBase16, SelectorLimit, pbmi16);
nbmiSize = GetBMI16Size(vpbmi16, (WORD) DIB_RGB_COLORS, &dwClrUsed);
// Under NT CreateDIBSection will fail if the offset to the bits
// is not dword aligned. So we may have to add some space at the top
// of the section to get the offset correctly aligned.
nAlignmentSpace = (nbmiSize+LOWORD(vpbmi16)) % 4;
if (nAlignmentSpace) {
if (WriteFile (hfile,
pbmi16,
nAlignmentSpace,
&nBytesWritten,
NULL) == FALSE ||
nBytesWritten != (INT) nAlignmentSpace)
goto hdd_err;
}
//
// detect a clinical case of bitedit screwing around dib.drv
//
// code below is using dib macros declared in wdib.h
// namely:
// DibNumColors - yields max number of colors in dib
// DibColors - yields pointer to a dib color table
//
// Function W32CheckDibColorIndices checks to see if DIB color
// table looks like a number (defined usually by biClrImportant)
// of WORD indices in a sequential order (0, 1, 2, ...)
// if this is the case, app is trying to use undocumented feature
// of DIB.DRV that turns color matching off in this case.
// Since we cannot enforce that rule, we approximate it by filling
// color table by a number of known (and always same) entries
// When blitting occurs, no color matching will be performed (when
// both target and destination are of this very nature).
// For no reason at all we fill color table with vga colors.
// Sequential indices could have worked just as well.
//
// Modifications are made to memory pointed to by lpbmi32
if (W32CheckDibColorIndices((LPBITMAPINFOHEADER)lpbmi32)) {
INT i, nColors;
LPBITMAPINFOHEADER lpbmi = (LPBITMAPINFOHEADER)lpbmi32;
LPRGBQUAD lprgbq = (LPRGBQUAD)DibColors(lpbmi);
nColors = DibNumColors(lpbmi);
lpbmi->biClrImportant = nColors;
switch (lpbmi->biBitCount) {
case 1:
lprgbq[0] = rgbVGA[0];
lprgbq[1] = rgbVGA[0x0f];
break;
case 4:
RtlCopyMemory(lprgbq, rgbVGA, sizeof(rgbVGA));
break;
case 8:
RtlCopyMemory(lprgbq, rgbVGA, 8*sizeof(RGBQUAD));
RtlCopyMemory(lprgbq+248, rgbVGA+8, 8*sizeof(RGBQUAD));
RtlCopyMemory(lprgbq+8, rgb4, 2*sizeof(RGBQUAD));
RtlCopyMemory(lprgbq+246, rgb4+2, 2*sizeof(RGBQUAD));
for (i = 10; i < 246; ++i) {
lprgbq[i].rgbBlue = i;
lprgbq[i].rgbGreen= 0;
lprgbq[i].rgbRed = 0;
lprgbq[i].rgbReserved = 0;
}
break;
default: // this should never happen
break;
}
}
if (WriteFile (hfile,
pbmi16,
SelectorLimit,
&nBytesWritten,
NULL) == FALSE || nBytesWritten != (INT) SelectorLimit)
goto hdd_err;
if (SelectorLimit < 64*1024) {
if (SetFilePointer (hfile,
64*1024+nAlignmentSpace,
NULL,
FILE_BEGIN) == -1)
goto hdd_err;
if (SetEndOfFile (hfile) == FALSE)
goto hdd_err;
SelectorLimit = 64*1024;
}
if ((hsec = CreateFileMapping (hfile,
NULL,
PAGE_READWRITE | SEC_COMMIT,
0,
SelectorLimit+nAlignmentSpace,
NULL)) == NULL) {
LOGDEBUG(LOG_ALWAYS,("\nWOW::W32HandleDibDrv CreateFileMapping Failed\n"));
goto hdd_err;
}
// Now create the DIB section
if ((hbm = CreateDIBSection (hdcMem,
lpbmi32,
DIB_RGB_COLORS,
&pvBits,
hsec,
nAlignmentSpace + LOWORD(vpbmi16) + nbmiSize
)) == NULL) {
LOGDEBUG(LOG_ALWAYS,("\nWOW::W32HandleDibDrv CreateDibSection Failed\n"));
goto hdd_err;
}
FREEVDMPTR(pbmi16);
if((pvBits = MapViewOfFile(hsec,
FILE_MAP_WRITE,
0,
0,
SelectorLimit+nAlignmentSpace)) == NULL) {
LOGDEBUG(LOG_ALWAYS,("\nWOW::W32HandleDibDrv MapViewOfFile Failed\n"));
goto hdd_err;
}
pvBits = (PVOID) ((ULONG)pvBits + nAlignmentSpace);
SelectObject (hdcMem, hbm);
GdiSetBatchLimit(1);
#ifndef i386
if (!NT_SUCCESS(VdmAddVirtualMemory((ULONG)pvBits,
(ULONG)SelectorLimit,
(PULONG)&pvIntelBits))) {
LOGDEBUG(LOG_ALWAYS,("\nWOW::W32HandleDibDrv VdmAddVirtualMemory failed\n"));
goto hdd_err;
}
// On risc platforms, the intel base + the intel linear address
// of the DIB section is not equal to the DIB section's process
// address. This is because of the VdmAddVirtualMemory call
// above. So here we zap the correct address into the flataddress
// array.
if (!VdmAddDescriptorMapping(HIWORD(vpbmi16),
(USHORT) ((SelectorLimit+65535)/65536),
(ULONG) pvIntelBits,
(ULONG) pvBits)) {
LOGDEBUG(LOG_ALWAYS,("\nWOW::W32HandleDibDrv VdmAddDescriptorMapping failed\n"));
goto hdd_err;
}
#else
pvIntelBits = pvBits;
#endif
// Finally set the selectors to the new DIB
Parm16.WndProc.wParam = HIWORD(vpbmi16);
Parm16.WndProc.lParam = (LONG)pvIntelBits;
Parm16.WndProc.wMsg = 0x10; // GA_NOCOMPACT
Parm16.WndProc.hwnd = 1; // set so it's not randomly 0
CallBack16(RET_SETDIBSEL,
&Parm16,
0,
(PVPVOID)&RetVal);
if (!RetVal) {
LOGDEBUG(LOG_ALWAYS,("\nWOW::W32HandleDibDrv Callback set_sel_for_dib failed\n"));
goto hdd_err;
}
// Store all the relevant information so that DeleteDC could
// free all the resources later.
if (W32AddDibInfo(hdcMem,
hfile,
hsec,
nAlignmentSpace,
pvBits,
pvIntelBits,
hbm,
OriginalSelLimit,
(USHORT)OriginalFlags,
(USHORT)((HIWORD(vpbmi16)))) == FALSE)
goto hdd_err;
// Finally spit out the dump for debugging
LOGDEBUG(6,("\t\tWOW::W32HandleDibDrv hdc=%04x nAlignment=%04x\n\t\tNewDib=%x OldDib=%04x:%04x DibSize=%x DibFlags=%x\n",hdcMem,nAlignmentSpace,pvBits,HIWORD(vpbmi16),LOWORD(vpbmi16),OriginalSelLimit,(USHORT)OriginalFlags));
bRet = TRUE;
hdd_err:;
}
finally {
if (!bRet) {
if (hdcMem) {
DeleteDC (hdcMem);
hdcMem = NULL;
}
if (hfile)
CloseHandle (hfile);
if (hsec)
CloseHandle (hsec);
if (hbm)
CloseHandle (hbm);
}
}
return hdcMem;
}
