How to display jpg image by ImageMagicK in MFC? - c++

Question

I have got a hard time to display jpg file at VIEW class by ImageMagicK in MFC.
The following code are my code. the problem is looking as following
image
void CTestview::DoDisplayImage(void)
{
CDC *pDC = GetDC();
if (fileposition != NULL)
AfxMessageBox(fileposition);
char m_szAppPath[255];
//m_szAppPath = (char) * fileposition;
(void)MagickCore::SetClientPath(fileposition);
InitializeMagick(fileposition);
MagickCore::RegisterStaticModules();
// Parse command line for standard shell commands, DDE, file open
Image m_Image;
m_Image.read(fileposition);
/*
char m_szAppPath[255];
(void) MagickCore::SetClientPath(m_szAppPath);
InitializeMagick(m_szAppPath);
MagickCore::RegisterStaticModules();
// Parse command line for standard shell commands, DDE, file open
CCommandLineInfo cmdInfo;
ParseCommandLine(cmdInfo);
Image master;
master.read("D:\\work\\mfc_test5\\q1.jpg");
*/
if (pDC != NULL && m_Image.isValid())
{
CRect rectClient;
GetClientRect(rectClient);
// Clear the background
pDC->FillSolidRect(rectClient, pDC->GetBkColor());
// Set up the Windows bitmap header
BITMAPINFOHEADER bmi;
bmi.biSize = sizeof(BITMAPINFOHEADER); // Size of structure
bmi.biWidth = m_Image.columns(); // Bitmaps width in pixels
bmi.biHeight = (-1)*m_Image.rows(); // Bitmaps height n pixels
bmi.biPlanes = 1; // Number of planes in the image
bmi.biBitCount = 32; // The number of bits per pixel
bmi.biCompression = BI_RGB; // The type of compression used
bmi.biSizeImage = 0; // The size of the image in bytes
bmi.biXPelsPerMeter = 0; // Horizontal resolution
bmi.biYPelsPerMeter = 0; // Veritical resolution
bmi.biClrUsed = 0; // Number of colors actually used
bmi.biClrImportant = 0; // Colors most important
// Extract the pixels from Magick++ image object and convert to a DIB section
PixelPacket *pPixels = m_Image.getPixels(0, 0, m_Image.columns(), m_Image.rows());
RGBQUAD *prgbaDIB = 0;
HBITMAP hBitmap = CreateDIBSection
(
pDC->m_hDC, // handle to device context
(BITMAPINFO *)&bmi, // pointer to structure containing bitmap size, format, and color data
DIB_RGB_COLORS, // color data type indicator: RGB values or palette indices
(void**)&prgbaDIB, // pointer to variable to receive a pointer to the bitmap's bit values
NULL, // optional handle to a file mapping object
0 // offset to the bitmap bit values within the file mapping object
);
if (!hBitmap)
return;
unsigned long nPixels = m_Image.columns() * m_Image.rows();
RGBQUAD *pDestPixel = prgbaDIB;
// Transfer pixels, scaling to Quantum
/*
for( unsigned long nPixelCount = nPixels; nPixelCount ; nPixelCount-- )
{
pDestPixel->rgbRed = MagickCore::GetPixelRed(m_Image.constImage(),pPixels)/257;
pDestPixel->rgbGreen = MagickCore::GetPixelGreen(m_Image.constImage(),pPixels)/257;
pDestPixel->rgbBlue = MagickCore::GetPixelBlue(m_Image.constImage(),pPixels)/257;
pDestPixel->rgbReserved = 0;
++pDestPixel;
pPixels+=MagickCore::GetPixelChannels(m_Image.constImage());
}
*/
for (int i = 0; i < 256; i++)
{
pPixels->blue = (BYTE)i;
pPixels->green = (BYTE)i;
pPixels->red = (BYTE)i;
pPixels->opacity = 0;
pPixels++;
}
// Now copy the bitmap to device.
HDC hMemDC = CreateCompatibleDC(pDC->m_hDC);
SelectObject(hMemDC, hBitmap);
BitBlt(pDC->m_hDC, 0, 0, m_Image.columns(), m_Image.rows(), hMemDC, 0, 0, SRCCOPY);
DeleteObject(hMemDC);
}
}
Especially, at the following code does not sure.
What should I do for solving this problem?
for( int i = 0 ; i < 256 ; i++ )
{
pPixels->blue = (BYTE)i;
pPixels->green = (BYTE)i;
pPixels->red = (BYTE)i;
pPixels->opacity = 0;
pPixels++;
}
Would you please help me how do I do for solving this problem?
As you can see, the output image has black.