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Print a Real Image Size in Inches

This tutorial describes how to print a real image size in inches using the LEADTOOLS C\C++ API.

  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:

Help Version 21.0.2023.2.15
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LEADTOOLS Raster Imaging C API Help
Introduction
Version History
Getting Started
Files To Be Included With Your Application
Document Writers – Files To Be Included With Your Application
LEADTOOLS Raster Imaging Features
Quick Reference
Tutorials
Function References
Callback Functions
Summary of Features
Appendix
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© 1991-2021 LEAD Technologies, Inc. All Rights Reserved.