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/******************************Module*Header*******************************\
* Module Name: savebmp.c
*
*
* Created: 06-Jan-1992 10:59:36
*
* Copyright (C) 1993-1995 Microsoft Corporation
*
* Contains the main routine, SaveBitmapFile, for saving a DDB into file
* in DIB format.
*
* Dependencies:
*
* (#defines)
* (#includes)
* #include <windows.h>
*
\**************************************************************************/
#define UNICODE
#include <windows.h>
#include <stdio.h>
#include "dumpBMP.h"
/******************************Public*Routine******************************\
* SaveBitmapFile
*
*
* Effects: Save pInfo->hBmpSaved into disk specified by pszFileName
*
* Warnings: assumes hBmpSaved is not selected into window's DC other than
* pInfo->hwnd's DC
*
\**************************************************************************/
//typedef LPBITMAPINFO PBITMAPINFO; // hack to keep cygwin32b17 happy
void CreateBMPFile(LPCTSTR pszFileName, HBITMAP hBmp, HDC hDC)
{
HANDLE hFile;
HBITMAP hTmpBmp, hBmpOld;
BITMAPFILEHEADER bfh;
LPBITMAPINFO pbmi;
PBYTE pBits;
BITMAPINFO bmi;
PBYTE pjTmp, pjTmpBmi;
ULONG sizBMI;
DWORD dwBytesWritten;
#if 0
if (ghPal) {
SelectPalette(hDC, ghPal, FALSE);
RealizePalette(hDC);
}
#endif
if (!hBmp) {
fprintf(stderr, "There's no Bitmap to save!");
return;
}
//
// Let the graphics engine to retrieve the dimension of the bitmap for us
// GetDIBits uses the size to determine if its BITMAPCOREINFO or BITMAPINFO
// if BitCount != 0, color table will be retrieved
//
bmi.bmiHeader.biSize = 0x28; // GDI need this to work
bmi.bmiHeader.biBitCount = 0; // dont get the color table
if ((GetDIBits(hDC, hBmp, 0, 0, (LPSTR)NULL, &bmi, DIB_RGB_COLORS)) == 0) {
fprintf(stderr, "GetDIBits failed!");
return;
}
//
// Now that we know the size of the image, alloc enough memory to retrieve
// the actual bits
//
if ((pBits = (PBYTE)GlobalAlloc(GMEM_FIXED | GMEM_ZEROINIT,
bmi.bmiHeader.biSizeImage)) == NULL) {
fprintf(stderr, "Failed in Memory Allocation for pBits!");
return;
}
//
// Note: 24 bits per pixel has no color table. So, we dont have to
// allocate memory for retrieving that. Otherwise, we do.
//
pbmi = &bmi; // assume no color table
switch (bmi.bmiHeader.biBitCount) {
case 24: // has color table
sizBMI = sizeof(BITMAPINFOHEADER);
break;
case 16:
case 32:
sizBMI = sizeof(BITMAPINFOHEADER)+sizeof(DWORD)*3;
break;
default:
sizBMI = sizeof(BITMAPINFOHEADER)+sizeof(RGBQUAD)*(1<<bmi.bmiHeader.biBitCount);
break;
}
//
// Allocate memory for color table if it is not 24bpp...
//
if (sizBMI != sizeof(BITMAPINFOHEADER)) {
ULONG sizTmp;
//
// I need more memory for the color table
//
if ((pbmi = (LPBITMAPINFO)GlobalAlloc(GMEM_FIXED | GMEM_ZEROINIT, sizBMI )) == NULL) {
fprintf(stderr, "Failed in Memory Allocation for pbmi!");
goto ErrExit1;
}
//
// Now that weve a bigger chunk of memory, lets copy the Bitmap
// info header data over
//
pjTmp = (PBYTE)pbmi;
pjTmpBmi = (PBYTE)&bmi;
sizTmp = sizeof(BITMAPINFOHEADER);
while(sizTmp--)
{
*(pjTmp++) = *(pjTmpBmi++);
}
}
//
// Lets open the file and get ready for writing
//
if ((hFile = CreateFileW(pszFileName, GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL))
== INVALID_HANDLE_VALUE) {
fprintf(stderr, "Failed in OpenFile!");
goto ErrExit2;
}
//
// But first, fill in the info for the BitmapFileHeader
//
bfh.bfType = 0x4D42; // BM
bfh.bfSize = sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER)+sizBMI+
pbmi->bmiHeader.biSizeImage;
bfh.bfReserved1 =
bfh.bfReserved2 = 0;
bfh.bfOffBits = sizeof(BITMAPFILEHEADER)+sizBMI;
//
// Write out the file header now
//
if (WriteFile(hFile, (LPCVOID)&bfh, sizeof(BITMAPFILEHEADER), &dwBytesWritten, NULL) == -1) {
fprintf(stderr, "Failed in WriteFile!");
goto ErrExit3;
}
//
// Bitmap cant be selected into a DC when calling GetDIBits
// Assume that the hDC is the DC where the bitmap would have been selected
// if indeed it has been selected
//
hTmpBmp = CreateCompatibleBitmap(hDC, pbmi->bmiHeader.biWidth, pbmi->bmiHeader.biHeight);
if (hTmpBmp) {
hBmpOld = SelectObject(hDC, hTmpBmp);
if ((GetDIBits(hDC, hBmp, 0, pbmi->bmiHeader.biHeight, (LPSTR)pBits, pbmi, DIB_RGB_COLORS))==0){
fprintf(stderr, "Failed in GetDIBits!");
goto ErrExit4;
}
} else {
fprintf(stderr, "Failed in creating bitmap!");
goto ErrExit3;
}
//
// Now write out the BitmapInfoHeader and color table, if any
//
if (WriteFile(hFile, (LPCVOID)pbmi, sizBMI, &dwBytesWritten, NULL) == -1) {
fprintf(stderr, "Failed in WriteFile!");
goto ErrExit4;
}
//
// write the bits also
//
if (WriteFile(hFile, (LPCVOID)pBits, pbmi->bmiHeader.biSizeImage, &dwBytesWritten, NULL) == -1) {
fprintf(stderr, "Failed in WriteFile!");
goto ErrExit4;
}
ErrExit4:
SelectObject(hDC, hBmpOld);
DeleteObject(hTmpBmp);
ErrExit3:
CloseHandle(hFile);
ErrExit2:
GlobalFree(pbmi);
ErrExit1:
GlobalFree(pBits);
return;
}
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