/*****************************************************************************
** CDib_ARGB::Load
**
** Side effects and Globals:
**
** Description:
**   Load a dib from a file.
**
** Return value: 0 if successful, else -1
**
*****************************************************************************/
int CDib_ARGB::Load(LPCSTR pFilename)
{
    int rc = 0;
    if (NULL == m_pRaw_vImage_Buffer)
    {
        NSString *pNS_filename = [[NSString alloc]initWithUTF8String:pFilename];
        NSImage *pNSImage = [[NSImage alloc] initWithContentsOfFile:pNS_filename];
        if (nil == pNSImage)
            rc = -1;
        else
        {
            int width = pNSImage.size.width;
            int height = pNSImage.size.height;
            if (pNSImage.representations)
            {
                NSImageRep *imageRep;
                int jj;
                width = 0;
                height = 0;
                for (jj = 0; jj < pNSImage.representations.count; jj++)
                {
                    imageRep = pNSImage.representations[jj];
                    if (imageRep.pixelsWide > width)
                        width = imageRep.pixelsWide;
                    if (imageRep.pixelsHigh > height)
                        height = imageRep.pixelsHigh;
                }
            }
            NSSize imageSize = NSMakeSize(width, height);
            NSRect imageRect = NSMakeRect(0, 0, width, height);
            pNSImage.size = imageSize;
            CGImageRef cgImage = [pNSImage CGImageForProposedRect:&imageRect context:NULL hints:nil];
            if (nil == cgImage)
                rc = -1;
            else
            {
                //Alloc and load vImage_Buffer.
                vImage_Buffer *pvImage_Buffer = new vImage_Buffer;
                if (NULL == pvImage_Buffer)
                    rc = -1;
                else
                {
                    vImage_CGImageFormat format;
                    format.bitsPerComponent = 8;
                    format.bitsPerPixel = 32;
                    format.colorSpace = nil;
                    format.bitmapInfo = kCGImageAlphaFirst | kCGBitmapByteOrderDefault;//ARGB8888
                    format.version = 0;
                    format.decode = nil;
                    format.renderingIntent = kCGRenderingIntentDefault;

                    memset(pvImage_Buffer, 0, sizeof(vImage_Buffer));

                    long status = vImageBuffer_InitWithCGImage(pvImage_Buffer, &format, nil, cgImage, kvImagePrintDiagnosticsToConsole);
                    if (kvImageNoError != status)
                    {
                        delete pvImage_Buffer;
                        rc = -1;
                    }
                    else
                    {
                        m_pRaw_vImage_Buffer = pvImage_Buffer;
                        m_dibSize = CXSize(pNSImage.size.width, pNSImage.size.height);
                        BuildScanLinePtrs(m_pRaw_vImage_Buffer);
                    }
                }
                
//                CGImageRelease(cgImage);
            }
        }
    }
	return(rc);
}