Click here to Skip to main content
14,766,265 members
Please Sign up or sign in to vote.
0.00/5 (No votes)
See more:
I am writing a C++ application to display two jpg images side by side and allow the user to "mark-up" the image by drawing a circle,rectangle, or line. I am using a wrapper class called CPicture by Paul DiLascia which encapsulates IPicture. I use the load functions to load the image from a file, and the render function to put the image in a rectangle on the face of a dialog to let the user do the drawing.

Problem 1: I use BitBlt to copy the image to a printer dc but it comes out about the size of a postage stamp ( does anyone remember how small a postage stamp is?)How can I change the scale of the printed image? When I tried StretchBlt I got a blue screen of death...

Problem 2: I need to retrieve the image from that rectangle to save the jpg back to the disk but I can't figure out how to effectively reverse the render function. I can copy the new image into a memory dc but how do I get it back into the CPicture object?

As always, thanks in advance for your help!
Ron H.
Posted
Comments
KarstenK 1-Mar-14 4:21am
   
1: check all parameters are the valid in range and access, StechBlt works, so it should

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)




CodeProject, 20 Bay Street, 11th Floor Toronto, Ontario, Canada M5J 2N8 +1 (416) 849-8900