Print a Real Image Size in Inches

1.	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

2.	Load the image in a LEAD bitmap:

L_LoadBitmap (TEXT("C:\\IMAGE1.CMP"), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL);

3.	Calculate the real width and height of the bitmap in inches:

fRealWidth = (L_FLOAT)LeadBitmap.Width / (L_FLOAT)LeadBitmap.XResolution;
fRealHeight = (L_FLOAT)LeadBitmap.Height / (L_FLOAT)LeadBitmap.YResolution;

4.	Get the printer device context:

hdcPrinter = L_PrintBitmap(NULL, NULL, 0, 0, 0, 0, FALSE);

5.	Get the width and height DPI:

fPrnDPIX = (L_FLOAT)GetDeviceCaps(hdcPrinter, LOGPIXELSX);
fPrnDPIY = (L_FLOAT)GetDeviceCaps(hdcPrinter, LOGPIXELSY);

6.	Now you are ready to print the image at its real size in inches:

L_PrintBitmap(hdcPrinter, &LeadBitmap, 1, 1, (L_INT)(fRealWidth * fPrnDPIX), (L_INT)(fRealHeight * fPrnDPIX), TRUE);

For more information, refer to:

Introduction: Printing

Printing a Single-Page Image with LEADTOOLS

Printing an Image

Printing Bitmaps Using GDI+

Demo Programs (Main Demo)