April 2018
Beginner
714 pages
18h 21m
English
book
Game Programming using Qt 5 Beginner's Guide - Second Edition
by Pavel Strakhov, Witold Wysota, Lorenz Haas
Content preview from Game Programming using Qt 5 Beginner's Guide - Second Edition
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Painting
Painting images in its basic form is as simple as calling drawImage() or drawPixmap() from the QPainter API. There are different variants of the two methods, but, basically, all of them allow one to specify which portion of a given image or pixmap is to be drawn and where. It is worth noting that painting pixmaps is preferred to painting images, as an image has to first be converted into a pixmap before it can be drawn.
If you have a lot of pixmaps to draw, a class called QPixmapCache may come in handy. It provides an application-wide cache for pixmaps. Using it, you can speed up pixmap loading while introducing a cap on memory usage.
Finally, if you just want to show a pixmap as a separate widget, you can use QLabel. This widget ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.