If you do any Win32 programming in C++ then I strongly recommend you learn about GDI+. Although it’s been around for a while now, it doesn’t seem to be well known. It can be great to have on hand even just to illustrate tests and prototypes though.
As it’s object-oriented, it’s much nicer and easier to use than the basic C-style GDI that used to be the norm. It also provides a lot of additional functionality which otherwise was not possible (or at least not easy) with the regular GDI functions alone. For example, proper alpha blending, matrix transformations, file input/output, and loads more. It’s quite easy to setup too.
GDI+ - Free source code and tutorials for Software developers and Architects.; Updated: 14 Dec 2020. Maybe a dumb question, but here goes: So, my C application uses GDI calls to draw pretty simple lines, arc, etc. Overlaid on images. I'd like to upgrade the look of those graphics - maybe with something a bit more powerful than GDI that can maybe do anti-aliasing, or other things to make the overlaid lines and circles look better and cute.
Unicode
One thing to be aware of first: GDI+ requires Unicode to be enabled. That means that all string literals need to be preceded by
L
or encased in the TEXT(.)
macro. It also means that you might find you need to change any string classes or functions. It can be a nightmare to port existing code, but it’s alright once you get there (or if you’re starting from scratch).Configure the Project
I’m using Visual C++ Express Edition 2008, which is free to download and use. The best thing to do is setup a simple windows application first. Just create a basic window, and your regular message pump/handler.
Next, you need to make sure Unicode is enabled for your code. To do that, go into your project properties page, select “C/C++” → “Preprocessor”, and beside “Preprocessor Definitions”, add “UNICODE”. Do this for Debug and Release modes, or whatever your configurations are.
After that, you need to link to the Gdiplus library. Still in Project Properties, go to “Linker” → “Input”, and beside “Additional Dependencies”, add “gdiplus.lib”. (Once again, do it for all configurations.)
Initialisation and cleanup
Now you need to add the code to initialise and cleanup the GDI+ system. Put the following code somewhere near the start of your WinMain function (before you create any windows):
Next, put the following code somewhere near the end of your WinMain function, after all other GDI+ objects have been deleted or fallen out of scope:
Finally, somewhere near the top of your source code file(s) where you will be using GDI+, you’ll want to put this:
How to use it
You’ll usually want to use GDI+ in your window’s “paint” event (although it can be used to write out to files too if you want). The main class you’ll be working with is the
Graphics
class which handles most of your drawing.You have to start by getting a
Graphics
object linked to the device context of your window so it can draw to it safely. There’s lots of ways to handle a paint event, but I’ll follow my preferred approach here (remember to make sure you’re window area is invalidated before doing this):Just like with the regular GDI, you draw and paint using pens and brushes, but thankfully these are much easier. We will fill in a rectangle with a red brush, and draw a green circle inside it:
Finally, we need to tell our window to finish painting now (this bit isn’t GDI+): Fifa 2008 cdsiz oynama cracki indir download no dvd.
Documentation
As you can see, it’s fairly easy to setup and use GDI+. I recommend looking at the GDI+ documentation on MSDN to help you get going.
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Gdi 2b Dev C 2b 2b File
Purpose
Windows GDI+ is a class-based API for C/C++ programmers. It enables applications to use graphics and formatted text on both the video display and the printer. Applications based on the Microsoft Win32 API do not access graphics hardware directly. Instead, GDI+ interacts with device drivers on behalf of applications. GDI+ is also supported by Microsoft Win64.
Where applicable
GDI+ functions and classes are not supported for use within a Windows service. Attempting to use these functions and classes from a Windows service may produce unexpected problems, such as diminished service performance and run-time exceptions or errors.
Note
When you use the GDI+ API, you must never allow your application to download arbitrary fonts from untrusted sources. The operating system requires elevated privileges to assure that all installed fonts are trusted.
Developer audience
The GDI+ C++ class-based interface is designed for use by C/C++ programmers. Familiarity with the Windows graphical user interface and message-driven architecture is required.
Run-time requirements
GDI+ can be used in all Windows-based applications. GDI+ was introduced in Windows XP and Windows Server 2003. For information about which operating systems are required to use a particular class or method, see the More Information section of the documentation for the class or method.
Gdi 2b Dev C 2b 2b C
In this section
Topic | Description |
---|---|
Overview | General information about GDI+. |
Using | Tasks and examples using GDI+. |
Reference | Documentation of GDI+ C++ class-based API. |