C++ - Problem with create bmp file and show it by createwindow() - c++

Question

I have a function that get data and create .BMP file as Qr Code.
int CreateBmpFile(std::wstring barcode)
{
const std::string data(barcode.begin(), barcode.end());
//const char* data;
char* szSourceSring = (char*)data.c_str();
unsigned int unWidth, x, y, l, n, unWidthAdjusted, unDataBytes;
unsigned char* pRGBData, * pSourceData, * pDestData;
QRcode* pQRC;
FILE* f;
// Compute QRCode
if (pQRC = QRcode_encodeString(szSourceSring, 0, QR_ECLEVEL_L, QR_MODE_8, 1))
//if(pQRC=QRcode_encodeString8bit(szSourceSring,0,QR_ECLEVEL_L))
{
unWidth = pQRC->width;
unWidthAdjusted = unWidth * OUT_FILE_PIXEL_PRESCALER * 3;
if (unWidthAdjusted % 4)
unWidthAdjusted = (unWidthAdjusted / 4 + 1) * 4;
unDataBytes = unWidthAdjusted * unWidth * OUT_FILE_PIXEL_PRESCALER;
// Allocate pixels buffer
if (!(pRGBData = (unsigned char*)malloc(unDataBytes)))
{
printf("Out of memory");
exit(-1);
}
// Preset to white
memset(pRGBData, 0xff, unDataBytes);
// Prepare bmp headers
BITMAPFILEHEADER kFileHeader;
kFileHeader.bfType = 0x4d42; // "BM"
kFileHeader.bfSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + unDataBytes;
kFileHeader.bfReserved1 = 0;
kFileHeader.bfReserved2 = 0;
kFileHeader.bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
BITMAPINFOHEADER kInfoHeader;
kInfoHeader.biSize = sizeof(BITMAPINFOHEADER);
kInfoHeader.biWidth = unWidth * OUT_FILE_PIXEL_PRESCALER;
kInfoHeader.biHeight = -((int)unWidth * OUT_FILE_PIXEL_PRESCALER);
kInfoHeader.biPlanes = 1;
kInfoHeader.biBitCount = 24;
kInfoHeader.biCompression = BI_RGB;
kInfoHeader.biSizeImage = 0;
kInfoHeader.biXPelsPerMeter = 0;
kInfoHeader.biYPelsPerMeter = 0;
kInfoHeader.biClrUsed = 0;
kInfoHeader.biClrImportant = 0;
// Convert QrCode bits to bmp pixels
pSourceData = pQRC->data;
for (y = 0; y < unWidth; y++)
{
pDestData = pRGBData + unWidthAdjusted * y * OUT_FILE_PIXEL_PRESCALER;
for (x = 0; x < unWidth; x++)
{
if (*pSourceData & 1)
{
for (l = 0; l < OUT_FILE_PIXEL_PRESCALER; l++)
{
for (n = 0; n < OUT_FILE_PIXEL_PRESCALER; n++)
{
*(pDestData + n * 3 + unWidthAdjusted * l) = PIXEL_COLOR_B;
*(pDestData + 1 + n * 3 + unWidthAdjusted * l) = PIXEL_COLOR_G;
*(pDestData + 2 + n * 3 + unWidthAdjusted * l) = PIXEL_COLOR_R;
}
}
}
pDestData += 3 * OUT_FILE_PIXEL_PRESCALER;
pSourceData++;
}
}
// Output the bmp file
if (!(fopen_s(&f, OUT_FILE, "wb")))
{
fwrite(&kFileHeader, sizeof(BITMAPFILEHEADER), 1, f);
fwrite(&kInfoHeader, sizeof(BITMAPINFOHEADER), 1, f);
fwrite(pRGBData, sizeof(unsigned char), unDataBytes, f);
fclose(f);
}
else
{
printf("Unable to open file");
exit(-1);
}
// Free data
free(pRGBData);
QRcode_free(pQRC);
}
else
{
printf("NULL returned");
exit(-1);
}
return 0;
}
After call this function, my bmp file create and I can open it in windows to show.
If I want to load it and show in my win32 dialog by follow code:
HBITMAP hBitmap = (HBITMAP)LoadImage(NULL, L"samanqrcode.bmp", IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE | LR_DEFAULTSIZE | LR_CREATEDIBSECTION | LR_SHARED);
DWORD err = GetLastError();
WCHAR szTest[10];
swprintf_s(szTest, 10, L"%d", err);
if(hBitmap == NULL)
::MessageBox(_hWnd, szTest, L"rrrrrrr", 0);
if (SUCCEEDED(hr))
{
_Image_Barcode = ::CreateWindow(_T("STATIC"), _T(""),
WS_CHILD | WS_VISIBLE | SS_BITMAP,
85, 70, 230, 230,
_hWnd,
(HMENU)IDI_BARCODE_IMAGE,
_hinst,
NULL);
if (_Image_Barcode == NULL)
hr = HRESULT_FROM_WIN32(::GetLastError());
}
::SendMessage(_Image_Barcode, STM_SETIMAGE, IMAGE_BITMAP, (LPARAM)hBitmap);
LoadImage function return NULL and error code is 0.
If I use other file name (any bmp file for example created by paint application in windows or other...) in LoadImage function, bmp file show correctly.
Is my method to create bmp file incorrect?
Edit:
This question is like my problem.
LoadImage() with QRCode bitmap failing unless file is opened/saved with MS Paint first
That user in comment say: #AbhilashAruva
Hi, Thanks for the reply. I am pretty new to these images in c++. I have found a workaround to fix this issue. I am generating the image in JPEG format from my library and then converting this image into bmp format using gdi+. The loadImage function is now able to load the new bmp image. Thanks for all the help. – Abhilash Aruva Oct 8 '14 at 7:40
What is he mine? I can not implement his method.

Answer 1

I find solution. Using from gdi+ to convert bmp to jpg and convert jpg to bmp.