This tutorial describes how to print a real image size in inches using the LEADTOOLS C\C++ API.
Define the following global variables:
LBitmapBase BitmapBase; // bitmap
L_FLOAT fRealWidth; // Image's real width in inches
L_FLOAT fRealHeight; // Image's real height in inches
L_FLOAT fPrnDPIX; // Number of pixels per logical inch along the screen width
L_FLOAT fPrnDPIY; // Number of pixels per logical inch along the screen height
Load the image in a LEAD bitmap:
BitmapBase.Load(TEXT("C:\\IMAGE1.CMP"), 0, ORDER_BGR, NULL, NULL);
Calculate the real width and height of the bitmap in inches:
fRealWidth = (L_FLOAT)BitmapBase.GetWidth() / (L_FLOAT)BitmapBase.GetXResolution();
fRealHeight = (L_FLOAT)BitmapBase.GetHeight() / (L_FLOAT)BitmapBase.GetYResolution();
Get the printer's device context:
HDC hdcPrinter = NULL; // Printer device context
LPrint LeadPrint(&BitmapBase); // LEAD Print
hdcPrinter = LeadPrint.GetPrinterDC();
Get the width and height DPI:
fPrnDPIX = (L_FLOAT)GetDeviceCaps(hdcPrinter, LOGPIXELSX);
fPrnDPIY = (L_FLOAT)GetDeviceCaps(hdcPrinter, LOGPIXELSY);
Now you are ready to print the image with real size in inches:
if(LeadPrint.IsValid() && hdcPrinter)
LeadPrint.Print(hdcPrinter, 1, 1, (L_INT)(fRealWidth * fPrnDPIX), (L_INT)(fRealHeight * fPrnDPIX));
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