Save as BMP image through DC

// Hbitmap bitmap handle converted image void writebmpfile (hbitmap, lptstr filename, HDC) {bitmap BMP; pbitmapinfo pbmi; Word cclrbits; handle Hf; // file handle bitmapfileheader HDR; // bitmap file-header pbitmapinfoheader pbih; // bitmap Info-header lpbyte lpbits; // memory pointer DWORD dwtotal; // total count of bytes dword cb; // incremental count of bytes byte * HP; // byte pointer DWORD dwtmp; // create The bitmapinfo header information if (! GetObject (hbitmap, sizeof (Bitmap), (lptstr) & BMP) {return;} // convert the color format to a count of bits. cclrbits = (Word) (BMP. bmplanes * BMP. bmbitspixel); If (cclrbits = 1) cclrbits = 1; else if (cclrbits else cclrbits = 32; // allocate memory for the bitmapinfo structure. if (cclrbits! = 24) pbmi = (pbitmapinfo) localalloc (lptr, sizeof (bitmapinfoheader) + sizeof (rgbquad) * (1 else pbmi = (pbitmapinfo) localalloc (lptr, sizeof (bitmapinfoheader )); // initialize the fields in the bitmapinfo structure. pbmi-> bmiheader. bisize = sizeof (bitmapinfoheader); pbmi-> bmiheader. biwidth = BMP. bmwidth; pbmi-> bmiheader. biheight = BMP. bmheight; pbmi-> bmiheader. biplanes = BMP. bmplanes; pbmi-> bmihead Er. bibitcount = BMP. bmbitspixel; If (cclrbits bmiheader. biclrused = (1 // If the bitmap is not compressed, set the bi_rgb flag. pbmi-> bmiheader. bicompression = bi_rgb; // compute the number of bytes in the array of color // indices and store the result in bisizeimage. pbmi-> bmiheader. bisizeimage = (pbmi-> bmiheader. biwidth + 7)/8 * pbmi-> bmiheader. biheight * cclrbits; // set biclrimportant to 0, I Ndicating that all of the // device colors are important. pbmi-> bmiheader. biclrimportant = 0; // now open file and save the data pbih = (pbitmapinfoheader) pbmi; lpbits = (lpbyte) globalalloc (gmem_fixed, pbih-> bisizeimage); If (! Lpbits) {return;} // retrieve the color table (rgbquad array) and the bits if (! Getdibits (HDC, hbitmap (hbitmap), 0, (Word) pbih-> biheight, lpbits, pbmi, dib_rgb_colors) {return;} // create. BMP file. HF = createfile (filename, generic_read | generic_write, (DWORD) 0, null, create_always, file_attribute_normal, (handle) null); If (HF = invalid_handle_value) {return;} HDR. bftype = 0x4d42; // 0x42 = "B" 0x4d = "M" // compute the size of the entire file. HDR. bfsize = (dwo Rd) (sizeof (bitmapfileheader) + pbih-> bisize + pbih-> biclrused * sizeof (rgbquad) + pbih-> bisizeimage); HDR. bfreserved1 = 0; HDR. bfreserved2 = 0; // compute the offset to the array of color indices. HDR. bfoffbits = (DWORD) sizeof (bitmapfileheader) + pbih-> bisize + pbih-> biclrused * sizeof (rgbquad); // copy the bitmapfileheader into. BMP file. if (! Writefile (HF, (lpvoid) & HDR, sizeof (bitmapfileheader), (lpdword) & dwtmp, null) {return ;}// copy the bitmapinfoheader and rgbquad array into the file. if (! Writefile (HF, (lpvoid) pbih, sizeof (bitmapinfoheader) + pbih-> biclrused * sizeof (rgbquad), (lpdword) & dwtmp, (null) {return ;} // copy the array of color indices into. BMP file. dwtotal = CB = pbih-> bisizeimage; HP = lpbits; If (! Writefile (HF, (lpstr) Hp, (INT) Cb, (lpdword) & dwtmp, null) {return ;}// close the. BMP file. If (! Closehandle (HF) {return;} // free memory. globalfree (hglobal) lpbits );}