X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/716cd4107bb8a5f37dea34507453be6870aaef3a..b3dc8a3e61aae7356f89e169da8b27736602e637:/src/msw/dib.cpp?ds=sidebyside diff --git a/src/msw/dib.cpp b/src/msw/dib.cpp index b1dc71542f..a4db58f8df 100644 --- a/src/msw/dib.cpp +++ b/src/msw/dib.cpp @@ -1,21 +1,29 @@ -///////////////////////////////////////////////////////////////////////////// -// Name: dib.cpp -// Purpose: Routines for dealing with Device Independent Bitmaps. -// Author: -// Modified by: Jason Quijano 06/06/2001 -// Created: 01/02/97 -// RCS-ID: $Id$ -// Copyright: (c) Julian Smart -///////////////////////////////////////////////////////////////////////////// -// FUNCTIONS : -// wxReadDIB() - Reads a DIB -// WriteDIB() - Writes a global handle in CF_DIB format to a file. -// wxPaletteSize() - Calculates the palette size in bytes of given DIB * -// DibNumColors() - Determines the number of colors in DIB -// DibFromBitmap() - Creates a DIB repr. the DDB passed in. -// lread() - Private routine to read more than 64k -// lwrite() - Private routine to write more than 64k -///////////////////////////////////////////////////////////////////////////// +/******************************************************************************* + * * + * MODULE : DIB.CC * + * * + * DESCRIPTION : Routines for dealing with Device Independent Bitmaps. * + * * + * FUNCTIONS : * + * * + * wxReadDIB() - Reads a DIB * + * * + * WriteDIB() - Writes a global handle in CF_DIB format* + * to a file. * + * * + * wxPaletteSize() - Calculates the palette size in bytes * + * of given DIB * + * * + * DibNumColors() - Determines the number of colors in DIB * + * * + * DibFromBitmap() - Creates a DIB repr. the DDB passed in. * + * * + * * + * lread() - Private routine to read more than 64k * + * * + * lwrite() - Private routine to write more than 64k * + * * + *******************************************************************************/ // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" @@ -39,339 +47,396 @@ #endif #include "wx/msw/dib.h" -#include "wx/filesys.h" #ifdef __GNUWIN32_OLD__ #include "wx/msw/gnuwin32/extra.h" #endif #ifndef SEEK_CUR -// flags for _lseek +/* flags for _lseek */ #define SEEK_CUR 1 #define SEEK_END 2 #define SEEK_SET 0 #endif -// Number of bytes to be read during each read operation. -#define MAXREAD 32768 +#define MAXREAD 32768 /* Number of bytes to be read during */ + /* each read operation. */ -// Header signatutes for various resources -#define BFT_ICON 0x4349 // 'IC' -#define BFT_BITMAP 0x4d42 // 'BM' -#define BFT_CURSOR 0x5450 // 'PT(' +/* Header signatutes for various resources */ +#define BFT_ICON 0x4349 /* 'IC' */ +#define BFT_BITMAP 0x4d42 /* 'BM' */ +#define BFT_CURSOR 0x5450 /* 'PT(' */ -// macro to determine if resource is a DIB -#define ISDIB(bft) ((bft) == BFT_BITMAP) +/* macro to determine if resource is a DIB */ +#define ISDIB(bft) ((bft) == BFT_BITMAP) -// Macro to align given value to the closest DWORD (unsigned long ) -#define ALIGNULONG(i) ((i+3)/4*4) +/* Macro to align given value to the closest DWORD (unsigned long ) */ +#define ALIGNULONG(i) ((i+3)/4*4) -// Macro to determine to round off the given value to the closest byte -#define WIDTHBYTES(i) ((i+31)/32*4) +/* Macro to determine to round off the given value to the closest byte */ +#define WIDTHBYTES(i) ((i+31)/32*4) -#define PALVERSION 0x300 -#define MAXPALETTE 256 // max. # supported palette entries +#define PALVERSION 0x300 +#define MAXPALETTE 256 /* max. # supported palette entries */ +static DWORD PASCAL lread(int fh, VOID FAR *pv, DWORD ul); static DWORD PASCAL lwrite(int fh, VOID FAR *pv, DWORD ul); -static BOOL WriteDIB (LPTSTR szFile,HANDLE hdib); -WORD wxPaletteSize (VOID FAR * pv); // This is non-static as some apps use it externally -static WORD DibNumColors (VOID FAR * pv); -// HANDLE DibFromBitmap (HBITMAP hbm, DWORD biStyle, WORD biBits, HPALETTE hpal); +static BOOL WriteDIB (LPTSTR szFile,HANDLE hdib); +WORD wxPaletteSize (VOID FAR * pv); // This is non-static as some apps use it externally +static WORD DibNumColors (VOID FAR * pv); +// HANDLE DibFromBitmap (HBITMAP hbm, DWORD biStyle, WORD biBits, HPALETTE hpal); static BOOL PASCAL MakeBitmapAndPalette(HDC,HANDLE,HPALETTE *,HBITMAP *); -// ---------------------------------------------------------------------------- -// FUNCTION : WriteDIB(LPSTR szFile,HANDLE hdib) -// PURPOSE : Write a global handle in CF_DIB format to a file. -// RETURNS : TRUE - if successful. FALSE - otherwise -// ---------------------------------------------------------------------------- -static BOOL WriteDIB( - LPTSTR szFile, - HANDLE hdib ) +/**************************************************************************** + * * + * FUNCTION : WriteDIB(LPSTR szFile,HANDLE hdib) * + * * + * PURPOSE : Write a global handle in CF_DIB format to a file. * + * * + * RETURNS : TRUE - if successful. * + * FALSE - otherwise * + * * + ****************************************************************************/ + +static BOOL WriteDIB(LPTSTR szFile, HANDLE hdib) { - BITMAPFILEHEADER hdr; - LPBITMAPINFOHEADER lpbi; - int fh; - OFSTRUCT of; + BITMAPFILEHEADER hdr; + LPBITMAPINFOHEADER lpbi; + int fh; + OFSTRUCT of; - if (!hdib) - return FALSE; - fh = OpenFile(wxConvertWX2MB(szFile), &of, OF_CREATE | OF_READWRITE); - if (fh == -1) - return FALSE; + if (!hdib) + return FALSE; + + fh = OpenFile(wxConvertWX2MB(szFile), &of, OF_CREATE | OF_READWRITE); + if (fh == -1) + return FALSE; #ifdef __WINDOWS_386__ - lpbi = (LPBITMAPINFOHEADER) MK_FP32(GlobalLock(hdib)); + lpbi = (LPBITMAPINFOHEADER) MK_FP32(GlobalLock(hdib)); #else - lpbi = (LPBITMAPINFOHEADER) GlobalLock(hdib); + lpbi = (LPBITMAPINFOHEADER) GlobalLock(hdib); #endif - // Fill in the fields of the file header - hdr.bfType = BFT_BITMAP; - hdr.bfSize = GlobalSize(hdib) + sizeof(BITMAPFILEHEADER); - hdr.bfReserved1 = 0; - hdr.bfReserved2 = 0; - hdr.bfOffBits = (DWORD) sizeof(BITMAPFILEHEADER) + lpbi->biSize + wxPaletteSize(lpbi); + /* Fill in the fields of the file header */ + hdr.bfType = BFT_BITMAP; + hdr.bfSize = GlobalSize(hdib) + sizeof(BITMAPFILEHEADER); + hdr.bfReserved1 = 0; + hdr.bfReserved2 = 0; + hdr.bfOffBits = (DWORD) sizeof(BITMAPFILEHEADER) + lpbi->biSize + + wxPaletteSize(lpbi); - // Write the file header - _lwrite(fh, (LPSTR) &hdr, sizeof(BITMAPFILEHEADER)); + /* Write the file header */ + _lwrite(fh, (LPSTR) &hdr, sizeof(BITMAPFILEHEADER)); - //Write the DIB header and the bits - lwrite(fh, (LPSTR) lpbi, GlobalSize(hdib)); + /* Write the DIB header and the bits */ + lwrite(fh, (LPSTR) lpbi, GlobalSize(hdib)); - GlobalUnlock(hdib); - _lclose(fh); - return TRUE; + GlobalUnlock(hdib); + _lclose(fh); + return TRUE; } -// ---------------------------------------------------------------------------- -// FUNCTION : wxPaletteSize(VOID FAR * pv) -// PURPOSE : Calculates the palette size in bytes. If the info. block -// is of the BITMAPCOREHEADER type, the number of colors is -// multiplied by 3 to give the palette size, otherwise the -// number of colors is multiplied by 4. -// RETURNS : Palette size in number of bytes. -// ---------------------------------------------------------------------------- -WORD wxPaletteSize( - VOID FAR * pv ) +/**************************************************************************** + * * + * FUNCTION : wxPaletteSize(VOID FAR * pv) * + * * + * PURPOSE : Calculates the palette size in bytes. If the info. block * + * is of the BITMAPCOREHEADER type, the number of colors is * + * multiplied by 3 to give the palette size, otherwise the * + * number of colors is multiplied by 4. * + * * + * RETURNS : Palette size in number of bytes. * + * * + ****************************************************************************/ + +WORD wxPaletteSize(VOID FAR * pv) { - LPBITMAPINFOHEADER lpbi; - WORD NumColors; + LPBITMAPINFOHEADER lpbi; + WORD NumColors; - lpbi = (LPBITMAPINFOHEADER) pv; - NumColors = DibNumColors(lpbi); + lpbi = (LPBITMAPINFOHEADER) pv; + NumColors = DibNumColors(lpbi); - if (lpbi->biSize == sizeof(BITMAPCOREHEADER)) - return (WORD)(NumColors * sizeof(RGBTRIPLE)); - else - return (WORD)(NumColors * sizeof(RGBQUAD)); + if (lpbi->biSize == sizeof(BITMAPCOREHEADER)) + return (WORD)(NumColors * sizeof(RGBTRIPLE)); + else + return (WORD)(NumColors * sizeof(RGBQUAD)); } -// ---------------------------------------------------------------------------- -// FUNCTION : DibNumColors(VOID FAR * pv) -// PURPOSE : Determines the number of colors in the DIB by looking at -// the BitCount filed in the info block. -// RETURNS : The number of colors in the DIB. -// ---------------------------------------------------------------------------- -static WORD DibNumColors( - VOID FAR *pv ) +/**************************************************************************** + * * + * FUNCTION : DibNumColors(VOID FAR * pv) * + * * + * PURPOSE : Determines the number of colors in the DIB by looking at * + * the BitCount filed in the info block. * + * * + * RETURNS : The number of colors in the DIB. * + * * + ****************************************************************************/ + +static WORD DibNumColors(VOID FAR *pv) { - int bits; - BITMAPINFOHEADER *lpbi; - BITMAPCOREHEADER *lpbc; - lpbi = ((BITMAPINFOHEADER*) pv); - lpbc = ((BITMAPCOREHEADER*) pv); - - // With the BITMAPINFO format headers, the size of the palette - // is in biClrUsed, whereas in the BITMAPCORE - style headers, it - // is dependent on the bits per pixel ( = 2 raised to the power of - // bits/pixel). - - if (lpbi->biSize != sizeof(BITMAPCOREHEADER)) { - if (lpbi->biClrUsed != 0) - return (WORD) lpbi->biClrUsed; - bits = lpbi->biBitCount; - } - else - bits = lpbc->bcBitCount; - - switch (bits) { - case 1: - return 2; - case 4: - return 16; - case 8: - return 256; - default: - // A 24 bitcount DIB has no color table - return 0; - } + int bits; + BITMAPINFOHEADER *lpbi; + BITMAPCOREHEADER *lpbc; + + lpbi = ((BITMAPINFOHEADER*) pv); + lpbc = ((BITMAPCOREHEADER*) pv); + + /* With the BITMAPINFO format headers, the size of the palette + * is in biClrUsed, whereas in the BITMAPCORE - style headers, it + * is dependent on the bits per pixel ( = 2 raised to the power of + * bits/pixel). + */ + if (lpbi->biSize != sizeof(BITMAPCOREHEADER)) { + if (lpbi->biClrUsed != 0) + return (WORD) lpbi->biClrUsed; + bits = lpbi->biBitCount; + } + else + bits = lpbc->bcBitCount; + + switch (bits) { + case 1: + return 2; + case 4: + return 16; + case 8: + return 256; + default: + /* A 24 bitcount DIB has no color table */ + return 0; + } } -// ---------------------------------------------------------------------------- -// FUNCTION : DibFromBitmap() -// PURPOSE : Will create a global memory block in DIB format that -// represents the Device-dependent bitmap (DDB) passed in. -// RETURNS : A handle to the DIB -// ---------------------------------------------------------------------------- +/**************************************************************************** + * * + * FUNCTION : DibFromBitmap() * + * * + * PURPOSE : Will create a global memory block in DIB format that * + * represents the Device-dependent bitmap (DDB) passed in. * + * * + * RETURNS : A handle to the DIB * + * * + ****************************************************************************/ + #if NOTHING -static HANDLE DibFromBitmap( - HBITMAP hbm, - DWORD biStyle, - WORD biBits, - HPALETTE hpal) +static HANDLE DibFromBitmap(HBITMAP hbm, DWORD biStyle, WORD biBits, HPALETTE hpal) { - BITMAP bm; - BITMAPINFOHEADER bi; - BITMAPINFOHEADER FAR *lpbi; - DWORD dwLen; - HANDLE hdib; - HANDLE h; - HDC hdc; - - if (!hbm) - return NULL; - if (hpal == NULL) - hpal = GetStockObject(DEFAULT_PALETTE); - - GetObject(hbm, sizeof (bm), (LPSTR) &bm); - - 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 + wxPaletteSize(&bi); - - hdc = GetDC((HWND) NULL); - hpal = SelectPalette(hdc, hpal, FALSE); - RealizePalette(hdc); - - hdib = GlobalAlloc(GHND, dwLen); - - if (!hdib) { - SelectPalette(hdc, hpal, FALSE); - ReleaseDC(NULL, hdc); - return NULL; - } + BITMAP bm; + BITMAPINFOHEADER bi; + BITMAPINFOHEADER FAR *lpbi; + DWORD dwLen; + HANDLE hdib; + HANDLE h; + HDC hdc; + + if (!hbm) + return NULL; + + if (hpal == NULL) + hpal = GetStockObject(DEFAULT_PALETTE); + + GetObject(hbm, sizeof (bm), (LPSTR) &bm); + + 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 + wxPaletteSize(&bi); + + hdc = GetDC((HWND) NULL); + hpal = SelectPalette(hdc, hpal, FALSE); + RealizePalette(hdc); + + hdib = GlobalAlloc(GHND, dwLen); + + if (!hdib) { + SelectPalette(hdc, hpal, FALSE); + ReleaseDC(NULL, hdc); + return NULL; + } #ifdef __WINDOWS_386__ - lpbi = (BITMAPINFOHEADER FAR *) MK_FP32(GlobalLock(hdib)); + lpbi = (BITMAPINFOHEADER FAR *) MK_FP32(GlobalLock(hdib)); #else - lpbi = (BITMAPINFOHEADER FAR *) GlobalLock(hdib); + lpbi = (BITMAPINFOHEADER FAR *) GlobalLock(hdib); #endif - *lpbi = bi; + *lpbi = bi; - // call GetDIBits with a NULL lpBits param, so it will calculate the - // biSizeImage field for us - GetDIBits(hdc, hbm, 0, (WORD) bi.biHeight, NULL, (LPBITMAPINFO) lpbi, DIB_RGB_COLORS); - bi = *lpbi; - GlobalUnlock(hdib); - - // If the driver did not fill in the biSizeImage field, make one up - if (bi.biSizeImage == 0) { - bi.biSizeImage = WIDTHBYTES((DWORD)bm.bmWidth * biBits) * bm.bmHeight; - if (biStyle != BI_RGB) - bi.biSizeImage = (bi.biSizeImage * 3) / 2; - } + /* call GetDIBits with a NULL lpBits param, so it will calculate the + * biSizeImage field for us + */ + GetDIBits(hdc, hbm, 0, (WORD) bi.biHeight, + NULL, (LPBITMAPINFO) lpbi, DIB_RGB_COLORS); - // realloc the buffer big enough to hold all the bits - dwLen = bi.biSize + wxPaletteSize(&bi) + bi.biSizeImage; - if (h = GlobalReAlloc(hdib, dwLen, 0)) - hdib = h; - else { - GlobalFree(hdib); - hdib = NULL; - SelectPalette(hdc, hpal, FALSE); - ReleaseDC(NULL, hdc); - return hdib; - } - - // call GetDIBits with a NON-NULL lpBits param, and actualy get the - // bits this time + bi = *lpbi; + GlobalUnlock(hdib); + /* If the driver did not fill in the biSizeImage field, make one up */ + if (bi.biSizeImage == 0) { + bi.biSizeImage = WIDTHBYTES((DWORD)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 + wxPaletteSize(&bi) + bi.biSizeImage; + if (h = GlobalReAlloc(hdib, dwLen, 0)) + hdib = h; + else { + GlobalFree(hdib); + hdib = NULL; + + SelectPalette(hdc, hpal, FALSE); + ReleaseDC(NULL, hdc); + return hdib; + } + + /* call GetDIBits with a NON-NULL lpBits param, and actualy get the + * bits this time + */ #ifdef __WINDOWS_386__ lpbi = (BITMAPINFOHEADER FAR *) MK_FP32(GlobalLock(hdib)); #else lpbi = (BITMAPINFOHEADER FAR *) GlobalLock(hdib); #endif - if (GetDIBits(hdc, - hbm, - 0, - (WORD) bi.biHeight, - (LPSTR) lpbi + (WORD) lpbi->biSize + wxPaletteSize(lpbi), - (LPBITMAPINFO) lpbi, DIB_RGB_COLORS) == 0) { - GlobalUnlock(hdib); - hdib = NULL; - SelectPalette(hdc, hpal, FALSE); - ReleaseDC((HWND) NULL, hdc); - return NULL; - } + if (GetDIBits(hdc, + hbm, + 0, + (WORD) bi.biHeight, + (LPSTR) lpbi + (WORD) lpbi->biSize + wxPaletteSize(lpbi), + (LPBITMAPINFO) lpbi, DIB_RGB_COLORS) == 0) { + GlobalUnlock(hdib); + hdib = NULL; + SelectPalette(hdc, hpal, FALSE); + ReleaseDC((HWND) NULL, hdc); + return NULL; + } bi = *lpbi; GlobalUnlock(hdib); + SelectPalette(hdc, hpal, FALSE); ReleaseDC(NULL, hdc); return hdib; } #endif + /************* PRIVATE ROUTINES TO READ/WRITE MORE THAN 64K ***************/ +/**************************************************************************** + * * + * FUNCTION : lread(int fh, VOID FAR *pv, DWORD ul) * + * * + * PURPOSE : Reads data in steps of 32k till all the data has been read.* + * * + * RETURNS : 0 - If read did not proceed correctly. * + * number of bytes read otherwise. * + * * + ****************************************************************************/ + +static DWORD PASCAL lread(int fh, void far *pv, DWORD ul) +{ + DWORD ulT = ul; +#if defined(WINNT) || defined(__WIN32__) || defined(__WIN32__) || defined(__WXWINE__) + BYTE *hp = (BYTE *) pv; +#else + BYTE huge *hp = (BYTE huge *) pv; +#endif + while (ul > (DWORD) MAXREAD) { + if (_lread(fh, (LPSTR) hp, (WORD) MAXREAD) != MAXREAD) + return 0; + ul -= MAXREAD; + hp += MAXREAD; + } + if (_lread(fh, (LPSTR) hp, (WXUINT) ul) != (WXUINT) ul) + return 0; + return ulT; +} -//************* PRIVATE ROUTINES TO WRITE MORE THAN 64K ****************** -// ---------------------------------------------------------------------------- -// FUNCTION : lwrite(int fh, VOID FAR *pv, DWORD ul) -// PURPOSE : Writes data in steps of 32k till all the data is written. -// RETURNS : 0 - If write did not proceed correctly. number of bytes written otherwise. -// ---------------------------------------------------------------------------- -static DWORD PASCAL lwrite( - int fh, - VOID FAR *pv, - DWORD ul) +/**************************************************************************** + * * + * FUNCTION : lwrite(int fh, VOID FAR *pv, DWORD ul) * + * * + * PURPOSE : Writes data in steps of 32k till all the data is written. * + * * + * RETURNS : 0 - If write did not proceed correctly. * + * number of bytes written otherwise. * + * * + ****************************************************************************/ + +static DWORD PASCAL lwrite(int fh, VOID FAR *pv, DWORD ul) { - DWORD ulT = ul; + DWORD ulT = ul; #if defined(WINNT) || defined(__WIN32__) || defined(__WIN32__) || defined(__WXWINE__) - BYTE *hp = (BYTE *) pv; + BYTE *hp = (BYTE *) pv; #else - BYTE huge *hp = (BYTE huge *) pv; + BYTE huge *hp = (BYTE huge *) pv; #endif - while (ul > MAXREAD) { - if (_lwrite(fh, (LPSTR) hp, (WORD) MAXREAD) != MAXREAD) - return 0; - ul -= MAXREAD; - hp += MAXREAD; - } - if (_lwrite(fh, (LPSTR) hp, (WXUINT) ul) != (WXUINT) ul) - return 0; - return ulT; + while (ul > MAXREAD) { + if (_lwrite(fh, (LPSTR) hp, (WORD) MAXREAD) != MAXREAD) + return 0; + ul -= MAXREAD; + hp += MAXREAD; + } + if (_lwrite(fh, (LPSTR) hp, (WXUINT) ul) != (WXUINT) ul) + return 0; + return ulT; } -// ---------------------------------------------------------------------------- -// FUNCTION : ReadDIB(hWnd) -// PURPOSE : Reads a DIB from a file, obtains a handle to its -// BITMAPINFO struct. and loads the DIB. Once the DIB -// is loaded, the function also creates a bitmap and -// palette out of the DIB for a device-dependent form. -// RETURNS : TRUE - DIB loaded and bitmap/palette created -// The DIBINIT structure pointed to by pInfo is -// filled with the appropriate handles. -// FALSE - otherwise -// ---------------------------------------------------------------------------- -BOOL wxReadDIB( - LPTSTR lpFileName, - HBITMAP *bitmap, - HPALETTE *palette) +/**************************************************************************** + * + * FUNCTION : ReadDIB(hWnd) + * + * PURPOSE : Reads a DIB from a file, obtains a handle to its + * BITMAPINFO struct. and loads the DIB. Once the DIB + * is loaded, the function also creates a bitmap and + * palette out of the DIB for a device-dependent form. + * + * RETURNS : TRUE - DIB loaded and bitmap/palette created + * The DIBINIT structure pointed to by pInfo is + * filled with the appropriate handles. + * FALSE - otherwise + * + ****************************************************************************/ +BOOL wxReadDIB(LPTSTR lpFileName, HBITMAP *bitmap, HPALETTE *palette) { + int fh; LPBITMAPINFOHEADER lpbi; - BITMAPFILEHEADER bf; - WORD nNumColors; + OFSTRUCT of; + BITMAPFILEHEADER bf; + WORD nNumColors; BOOL result = FALSE; WORD offBits; HDC hDC; BOOL bCoreHead = FALSE; HANDLE hDIB = 0; - // JQ: We want to use wxFileSystem here in stead of Openfile so - // that we can use other FS types like a zip files. - wxFileSystem fsys; - wxFSFile *file = fsys.OpenFile(lpFileName); - wxInputStream *dibs = file->GetStream(); - if (!dibs) { + /* Open the file and get a handle to it's BITMAPINFO */ + + fh = OpenFile (wxConvertWX2MB(lpFileName), &of, OF_READ); + if (fh == -1) { wxLogError(_("Can't open file '%s'"), lpFileName); return (0); - } + } - hDIB = GlobalAlloc(GHND, (DWORD)(sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD))); + hDIB = GlobalAlloc(GHND, (DWORD)(sizeof(BITMAPINFOHEADER) + + 256 * sizeof(RGBQUAD))); if (!hDIB) return(0); @@ -381,69 +446,57 @@ BOOL wxReadDIB( lpbi = (LPBITMAPINFOHEADER)GlobalLock(hDIB); #endif - // JQ: read from the wxInputStream dibs instead of fh so - // that we can use other FS types like zip files. - dibs->Read((LPSTR)&bf,sizeof(bf)); - if (sizeof(bf) != dibs->LastRead()) + /* read the BITMAPFILEHEADER */ + if (sizeof (bf) != _lread (fh, (LPSTR)&bf, sizeof (bf))) goto ErrExit; - if (bf.bfType != 0x4d42) // 'BM' + if (bf.bfType != 0x4d42) /* 'BM' */ goto ErrExit; - // JQ: read from the wxInputStream dibs instead of fh so - // that we can use other FS types like zip files. - dibs->Read((LPSTR)lpbi,sizeof(BITMAPCOREHEADER)); - if (sizeof(BITMAPCOREHEADER) != dibs->LastRead()) + if (sizeof(BITMAPCOREHEADER) != _lread (fh, (LPSTR)lpbi, sizeof(BITMAPCOREHEADER))) goto ErrExit; - if (lpbi->biSize == sizeof(BITMAPCOREHEADER)){ + if (lpbi->biSize == sizeof(BITMAPCOREHEADER)) + { lpbi->biSize = sizeof(BITMAPINFOHEADER); lpbi->biBitCount = ((LPBITMAPCOREHEADER)lpbi)->bcBitCount; lpbi->biPlanes = ((LPBITMAPCOREHEADER)lpbi)->bcPlanes; lpbi->biHeight = ((LPBITMAPCOREHEADER)lpbi)->bcHeight; lpbi->biWidth = ((LPBITMAPCOREHEADER)lpbi)->bcWidth; bCoreHead = TRUE; - } - else { - - // JQ: Get to the start of the header and read INFOHEADER - // using dibs wxInputStream - dibs->SeekI(sizeof(BITMAPFILEHEADER),wxFromStart); - if (dibs->LastError() != wxSTREAM_NO_ERROR) - goto ErrExit; - - // JQ: read from the wxInputStream dibs instead of fh so - // that we can use other FS types like zip files. - // Can I do error checking with this? - dibs->Read((LPSTR)lpbi,sizeof(BITMAPINFOHEADER)); - if (sizeof(BITMAPINFOHEADER) != dibs->LastRead()) + } + else + { + // get to the start of the header and read INFOHEADER + _llseek(fh,sizeof(BITMAPFILEHEADER),SEEK_SET); + if (sizeof(BITMAPINFOHEADER) != _lread (fh, (LPSTR)lpbi, sizeof(BITMAPINFOHEADER))) goto ErrExit; - - } + } nNumColors = (WORD)lpbi->biClrUsed; - if ( nNumColors == 0 ) { - // no color table for 24-bit, default size otherwise + if ( nNumColors == 0 ) + { + /* no color table for 24-bit, default size otherwise */ if (lpbi->biBitCount != 24) - nNumColors = 1 << lpbi->biBitCount; // standard size table - } + nNumColors = 1 << lpbi->biBitCount; /* standard size table */ + } - // fill in some default values if they are zero + /* fill in some default values if they are zero */ if (lpbi->biClrUsed == 0) lpbi->biClrUsed = nNumColors; - if (lpbi->biSizeImage == 0){ + if (lpbi->biSizeImage == 0) + { lpbi->biSizeImage = ((((lpbi->biWidth * (DWORD)lpbi->biBitCount) + 31) & ~31) >> 3) - * lpbi->biHeight; - } + * lpbi->biHeight; + } - // get a proper-sized buffer for header, color table and bits + /* get a proper-sized buffer for header, color table and bits */ GlobalUnlock(hDIB); - hDIB = GlobalReAlloc(hDIB, lpbi->biSize + nNumColors * sizeof(RGBQUAD) + - lpbi->biSizeImage, 0); - - // can't resize buffer for loading - if (!hDIB) + hDIB = GlobalReAlloc(hDIB, lpbi->biSize + + nNumColors * sizeof(RGBQUAD) + + lpbi->biSizeImage, 0); + if (!hDIB) /* can't resize buffer for loading */ goto ErrExit2; #ifdef __WINDOWS_386__ @@ -452,36 +505,43 @@ BOOL wxReadDIB( lpbi = (LPBITMAPINFOHEADER)GlobalLock(hDIB); #endif - // read the color table + /* read the color table */ if (!bCoreHead) - dibs->Read((LPSTR)lpbi + lpbi->biSize, nNumColors * sizeof(RGBQUAD)); - else { + _lread(fh, (LPSTR)(lpbi) + lpbi->biSize, nNumColors * sizeof(RGBQUAD)); + else + { signed int i; RGBQUAD FAR *pQuad; RGBTRIPLE FAR *pTriple; - dibs->Read((LPSTR)lpbi + lpbi->biSize, nNumColors * sizeof(RGBTRIPLE)); + + _lread(fh, (LPSTR)(lpbi) + lpbi->biSize, nNumColors * sizeof(RGBTRIPLE)); + pQuad = (RGBQUAD FAR *)((LPSTR)lpbi + lpbi->biSize); pTriple = (RGBTRIPLE FAR *) pQuad; - for (i = nNumColors - 1; i >= 0; i--){ + for (i = nNumColors - 1; i >= 0; i--) + { pQuad[i].rgbRed = pTriple[i].rgbtRed; pQuad[i].rgbBlue = pTriple[i].rgbtBlue; pQuad[i].rgbGreen = pTriple[i].rgbtGreen; pQuad[i].rgbReserved = 0; - } } + } - // offset to the bits from start of DIB header + /* offset to the bits from start of DIB header */ offBits = (WORD)(lpbi->biSize + nNumColors * sizeof(RGBQUAD)); if (bf.bfOffBits != 0L) - dibs->SeekI(bf.bfOffBits, wxFromStart); + { + _llseek(fh,bf.bfOffBits,SEEK_SET); + } - dibs->Read((LPSTR)lpbi + offBits,lpbi->biSizeImage); - if (lpbi->biSizeImage == dibs->LastRead()) + if (lpbi->biSizeImage == lread(fh, (LPSTR)lpbi + offBits, lpbi->biSizeImage)) { GlobalUnlock(hDIB); + hDC = GetDC(NULL); - if (!MakeBitmapAndPalette(hDC, hDIB, palette, bitmap)) + if (!MakeBitmapAndPalette(hDC, hDIB, palette, + bitmap)) { ReleaseDC(NULL,hDC); goto ErrExit2; @@ -500,23 +560,28 @@ ErrExit: ErrExit2: GlobalFree(hDIB); } + + _lclose(fh); return(result); } -// ---------------------------------------------------------------------------- -// FUNCTION : MakeBitmapAndPalette -// PURPOSE : Given a DIB, creates a bitmap and corresponding palette -// to be used for a device-dependent representation of -// of the image. -// RETURNS : TRUE --> success. phPal and phBitmap are filled with -// appropriate handles. Caller is responsible for freeing objects. -// FALSE --> unable to create objects. both pointer are not valid -// ---------------------------------------------------------------------------- -static BOOL PASCAL MakeBitmapAndPalette( - HDC hDC, - HANDLE hDIB, - HPALETTE * phPal, - HBITMAP * phBitmap) +/**************************************************************************** + * + * FUNCTION : MakeBitmapAndPalette + * + * PURPOSE : Given a DIB, creates a bitmap and corresponding palette + * to be used for a device-dependent representation of + * of the image. + * + * RETURNS : TRUE --> success. phPal and phBitmap are filled with + * appropriate handles. Caller is responsible + * for freeing objects. + * FALSE --> unable to create objects. both pointer are + * not valid + * + ****************************************************************************/ +static BOOL PASCAL MakeBitmapAndPalette(HDC hDC, HANDLE hDIB, + HPALETTE * phPal, HBITMAP * phBitmap) { LPBITMAPINFOHEADER lpInfo; BOOL result = FALSE; @@ -556,29 +621,35 @@ static BOOL PASCAL MakeBitmapAndPalette( } GlobalUnlock (hDIB); // glt + return(result); } -// ---------------------------------------------------------------------------- -// FUNCTION : wxMakeDIBPalette(lpInfo) -// PURPOSE : Given a BITMAPINFOHEADER, create a palette based on -// the color table. -// RETURNS : non-zero - handle of a corresponding palette -// zero - unable to create palette -// ---------------------------------------------------------------------------- -HPALETTE wxMakeDIBPalette( - LPBITMAPINFOHEADER lpInfo ) +/**************************************************************************** + * * + * FUNCTION : wxMakeDIBPalette(lpInfo) * + * * + * PURPOSE : Given a BITMAPINFOHEADER, create a palette based on + * the color table. + * + * * + * RETURNS : non-zero - handle of a corresponding palette + * zero - unable to create palette + * * + ****************************************************************************/ +HPALETTE wxMakeDIBPalette(LPBITMAPINFOHEADER lpInfo) { #ifdef __WXWINE__ - return (FALSE); + return (FALSE); #else LPLOGPALETTE npPal; RGBQUAD far *lpRGB; HPALETTE hLogPal; WORD i; - // since biClrUsed field was filled during the loading of the DIB, - // we know it contains the number of colors in the color table. + /* since biClrUsed field was filled during the loading of the DIB, + ** we know it contains the number of colors in the color table. + */ if (lpInfo->biClrUsed) { /* @@ -593,10 +664,10 @@ HPALETTE wxMakeDIBPalette( npPal->palVersion = 0x300; npPal->palNumEntries = (WORD)lpInfo->biClrUsed; - // get pointer to the color table + /* get pointer to the color table */ lpRGB = (RGBQUAD FAR *)((LPSTR)lpInfo + lpInfo->biSize); - // copy colors from the color table to the LogPalette structure + /* copy colors from the color table to the LogPalette structure */ for (i = 0; (DWORD)i < lpInfo->biClrUsed; i++, lpRGB++) { npPal->palPalEntry[i].peRed = lpRGB->rgbRed; @@ -608,118 +679,110 @@ HPALETTE wxMakeDIBPalette( hLogPal = CreatePalette((LPLOGPALETTE)npPal); // LocalFree((HANDLE)npPal); free(npPal); + return(hLogPal); } - // 24-bit DIB with no color table. return default palette. Another - // option would be to create a 256 color "rainbow" palette to provide - // some good color choices. + /* 24-bit DIB with no color table. return default palette. Another + ** option would be to create a 256 color "rainbow" palette to provide + ** some good color choices. + */ else return((HPALETTE) GetStockObject(DEFAULT_PALETTE)); #endif + } -// ---------------------------------------------------------------------------- -// FUNCTION : -// PURPOSE : -// RETURNS : -// ---------------------------------------------------------------------------- -bool wxLoadIntoBitmap( - wxChar *filename, - wxBitmap *bitmap, - wxPalette **pal) +bool wxLoadIntoBitmap(wxChar *filename, wxBitmap *bitmap, wxPalette **pal) { - HBITMAP hBitmap; - HPALETTE hPalette; + HBITMAP hBitmap; + HPALETTE hPalette; - bool success = (wxReadDIB(filename, &hBitmap, &hPalette) != 0); - if (!success) - { - DeleteObject(hPalette); - return FALSE; - } + bool success = (wxReadDIB(filename, &hBitmap, &hPalette) != 0); - if (hPalette) + if (!success) + { + DeleteObject(hPalette); + return FALSE; + } + + if (hPalette) + { + if (pal) { - if (pal) - { - *pal = new wxPalette; - (*pal)->SetHPALETTE((WXHPALETTE) hPalette); - } - else - DeleteObject(hPalette); + *pal = new wxPalette; + (*pal)->SetHPALETTE((WXHPALETTE) hPalette); } - else if (pal) - *pal = NULL; + else + DeleteObject(hPalette); + } + else if (pal) + *pal = NULL; - if (hBitmap) - { - BITMAP bm; - GetObject(hBitmap, sizeof(bm), (LPSTR)&bm); + if (hBitmap) + { + BITMAP bm; + GetObject(hBitmap, sizeof(bm), (LPSTR)&bm); - bitmap->SetHBITMAP((WXHBITMAP) hBitmap); - bitmap->SetWidth(bm.bmWidth); - bitmap->SetHeight(bm.bmHeight); - bitmap->SetDepth(bm.bmPlanes * bm.bmBitsPixel); + bitmap->SetHBITMAP((WXHBITMAP) hBitmap); + bitmap->SetWidth(bm.bmWidth); + bitmap->SetHeight(bm.bmHeight); + bitmap->SetDepth(bm.bmPlanes * bm.bmBitsPixel); #if WXWIN_COMPATIBILITY_2 - bitmap->SetOk(TRUE); + bitmap->SetOk(TRUE); #endif // WXWIN_COMPATIBILITY_2 - return TRUE; - } - else return FALSE; + return TRUE; + } + else return FALSE; } -// ---------------------------------------------------------------------------- -// FUNCTION : -// PURPOSE : -// RETURNS : -// ---------------------------------------------------------------------------- -wxBitmap *wxLoadBitmap( - wxChar *filename, - wxPalette **pal) +wxBitmap *wxLoadBitmap(wxChar *filename, wxPalette **pal) { - wxBitmap *bitmap = new wxBitmap; - if (wxLoadIntoBitmap(filename, bitmap, pal)) - return bitmap; - else - { - delete bitmap; - return NULL; - } + wxBitmap *bitmap = new wxBitmap; + if (wxLoadIntoBitmap(filename, bitmap, pal)) + return bitmap; + else + { + delete bitmap; + return NULL; + } } //--------------------------------------------------------------------- -// FUNCTION : InitBitmapInfoHeader -// PURPOSE : Does a "standard" initialization of a BITMAPINFOHEADER, -// given the Width, Height, and Bits per Pixel for the DIB. // -// By standard, I mean that all the relevant fields are set -// to the specified values. biSizeImage is computed, the -// biCompression field is set to "no compression," and all -// other fields are 0. +// Function: InitBitmapInfoHeader +// +// Purpose: Does a "standard" initialization of a BITMAPINFOHEADER, +// given the Width, Height, and Bits per Pixel for the +// DIB. // -// Note that DIBs only allow BitsPixel values of 1, 4, 8, or -// 24. This routine makes sure that one of these values is -// used (whichever is most appropriate for the specified -// nBPP). +// By standard, I mean that all the relevant fields are set +// to the specified values. biSizeImage is computed, the +// biCompression field is set to "no compression," and all +// other fields are 0. // -// PARMS : lpBmInfoHdr == Far pointer to a BITMAPINFOHEADER structure +// Note that DIBs only allow BitsPixel values of 1, 4, 8, or +// 24. This routine makes sure that one of these values is +// used (whichever is most appropriate for the specified +// nBPP). +// +// Parms: lpBmInfoHdr == Far pointer to a BITMAPINFOHEADER structure // to be filled in. -// dwWidth == Width of DIB (not in Win 3.0 & 3.1, high +// dwWidth == Width of DIB (not in Win 3.0 & 3.1, high // word MUST be 0). -// dwHeight == Height of DIB (not in Win 3.0 & 3.1, high +// dwHeight == Height of DIB (not in Win 3.0 & 3.1, high // word MUST be 0). -// nBPP == Bits per Pixel for the DIB. +// nBPP == Bits per Pixel for the DIB. // // History: Date Reason // 11/07/91 Created // //--------------------------------------------------------------------- -static void InitBitmapInfoHeader ( - LPBITMAPINFOHEADER lpBmInfoHdr, - DWORD dwWidth, - DWORD dwHeight, - int nBPP ) + +static void InitBitmapInfoHeader (LPBITMAPINFOHEADER lpBmInfoHdr, + DWORD dwWidth, + DWORD dwHeight, + int nBPP) { // _fmemset (lpBmInfoHdr, 0, sizeof (BITMAPINFOHEADER)); memset (lpBmInfoHdr, 0, sizeof (BITMAPINFOHEADER)); @@ -746,17 +809,16 @@ static void InitBitmapInfoHeader ( lpBmInfoHdr->biSizeImage = WIDTHBYTES (dwWidth * nBPP) * dwHeight; } -// ---------------------------------------------------------------------------- -// FUNCTION : -// PURPOSE : -// RETURNS : -// ---------------------------------------------------------------------------- + + + LPSTR wxFindDIBBits (LPSTR lpbi) { return (lpbi + *(LPDWORD)lpbi + wxPaletteSize (lpbi)); } //--------------------------------------------------------------------- +// // Function: BitmapToDIB // // Purpose: Given a device dependent bitmap and a palette, returns @@ -774,21 +836,20 @@ LPSTR wxFindDIBBits (LPSTR lpbi) // 6/01/91 Created // //--------------------------------------------------------------------- -HANDLE wxBitmapToDIB ( - HBITMAP hBitmap, - HPALETTE hPal) + +HANDLE wxBitmapToDIB (HBITMAP hBitmap, HPALETTE hPal) { - BITMAP Bitmap; - BITMAPINFOHEADER bmInfoHdr; - LPBITMAPINFOHEADER lpbmInfoHdr; - LPSTR lpBits; - HDC hMemDC; - HANDLE hDIB; - HPALETTE hOldPal = NULL; - - // Do some setup -- make sure the Bitmap passed in is valid, - // get info on the bitmap (like its height, width, etc.), - // then setup a BITMAPINFOHEADER. + BITMAP Bitmap; + BITMAPINFOHEADER bmInfoHdr; + LPBITMAPINFOHEADER lpbmInfoHdr; + LPSTR lpBits; + HDC hMemDC; + HANDLE hDIB; + HPALETTE hOldPal = NULL; + + // Do some setup -- make sure the Bitmap passed in is valid, + // get info on the bitmap (like its height, width, etc.), + // then setup a BITMAPINFOHEADER. if (!hBitmap) return NULL; @@ -802,82 +863,81 @@ HANDLE wxBitmapToDIB ( Bitmap.bmPlanes * Bitmap.bmBitsPixel); - // Now allocate memory for the DIB. Then, set the BITMAPINFOHEADER - // into this memory, and find out where the bitmap bits go. + // Now allocate memory for the DIB. Then, set the BITMAPINFOHEADER + // into this memory, and find out where the bitmap bits go. - hDIB = GlobalAlloc (GHND, sizeof (BITMAPINFOHEADER) + - wxPaletteSize ((LPSTR) &bmInfoHdr) + bmInfoHdr.biSizeImage); + hDIB = GlobalAlloc (GHND, sizeof (BITMAPINFOHEADER) + + wxPaletteSize ((LPSTR) &bmInfoHdr) + bmInfoHdr.biSizeImage); - if (!hDIB) - return NULL; + if (!hDIB) + return NULL; #ifdef __WINDOWS_386__ - lpbmInfoHdr = (LPBITMAPINFOHEADER) MK_FP32(GlobalLock (hDIB)); + lpbmInfoHdr = (LPBITMAPINFOHEADER) MK_FP32(GlobalLock (hDIB)); #else - lpbmInfoHdr = (LPBITMAPINFOHEADER) GlobalLock (hDIB); + lpbmInfoHdr = (LPBITMAPINFOHEADER) GlobalLock (hDIB); #endif - *lpbmInfoHdr = bmInfoHdr; - lpBits = wxFindDIBBits ((LPSTR) lpbmInfoHdr); + *lpbmInfoHdr = bmInfoHdr; + lpBits = wxFindDIBBits ((LPSTR) lpbmInfoHdr); - // Now, we need a DC to hold our bitmap. If the app passed us - // a palette, it should be selected into the DC. - hMemDC = GetDC (NULL); - if (hPal) - { - hOldPal = SelectPalette (hMemDC, hPal, FALSE); - RealizePalette (hMemDC); - } + // Now, we need a DC to hold our bitmap. If the app passed us + // a palette, it should be selected into the DC. + + hMemDC = GetDC (NULL); - // We're finally ready to get the DIB. Call the driver and let - // it party on our bitmap. It will fill in the color table, - // and bitmap bits of our global memory block. - if (!GetDIBits (hMemDC, + if (hPal) + { + hOldPal = SelectPalette (hMemDC, hPal, FALSE); + RealizePalette (hMemDC); + } + + + + // We're finally ready to get the DIB. Call the driver and let + // it party on our bitmap. It will fill in the color table, + // and bitmap bits of our global memory block. + + if (!GetDIBits (hMemDC, hBitmap, 0, Bitmap.bmHeight, lpBits, (LPBITMAPINFO) lpbmInfoHdr, DIB_RGB_COLORS)) - { - GlobalUnlock (hDIB); - GlobalFree (hDIB); - hDIB = NULL; - } - else - GlobalUnlock (hDIB); + { + GlobalUnlock (hDIB); + GlobalFree (hDIB); + hDIB = NULL; + } + else + GlobalUnlock (hDIB); + + + // Finally, clean up and return. - // Finally, clean up and return. if (hOldPal) - SelectPalette (hMemDC, hOldPal, FALSE); + SelectPalette (hMemDC, hOldPal, FALSE); ReleaseDC (NULL, hMemDC); + return hDIB; } -// ---------------------------------------------------------------------------- -// FUNCTION : -// PURPOSE : -// RETURNS : -// ---------------------------------------------------------------------------- -bool wxSaveBitmap( - wxChar *filename, - wxBitmap *bitmap, - wxPalette *colourmap) +bool wxSaveBitmap(wxChar *filename, wxBitmap *bitmap, wxPalette *colourmap) { - HPALETTE hPalette = 0; - if (colourmap) - hPalette = (HPALETTE) colourmap->GetHPALETTE(); - - HANDLE dibHandle = wxBitmapToDIB((HBITMAP) bitmap->GetHBITMAP(), hPalette); - if (dibHandle) - { - bool success = (WriteDIB(filename, dibHandle) != 0); - GlobalFree(dibHandle); - return success; - } - else return FALSE; + HPALETTE hPalette = 0; + if (colourmap) + hPalette = (HPALETTE) colourmap->GetHPALETTE(); + + HANDLE dibHandle = wxBitmapToDIB((HBITMAP) bitmap->GetHBITMAP(), hPalette); + if (dibHandle) + { + bool success = (WriteDIB(filename, dibHandle) != 0); + GlobalFree(dibHandle); + return success; + } + else return FALSE; } -