U++ forum: Welcome to the forum

Search on this site

Search in forums

Home » Community » Newbie corner » Real-time image drawing

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Real-time image drawing [message #27176]

Tue, 29 June 2010 18:07

korisk
Messages: 2
Registered: June 2010
Location: Russia

Junior Member

Hi is it possible to use U++ for creating dinamic real-time image, like visualisation of FFT of sound flow?
If yes, give me please several keywords to search instructions.
Thank you.

PS. I like the framework it seems simple, but poweerful tool.

[Updated on: Tue, 29 June 2010 20:07]

Report message to a moderator

Re: Real-time image drawing [message #27191 is a reply to message #27176]

Wed, 30 June 2010 07:19

Mindtraveller
Messages: 917
Registered: August 2007
Location: Russia, Moscow rgn.

Experienced Contributor

There is a possibility to use ImageBuffer class from Painter package to make images in run-time (just call Image(ImageBuffer &) constructor). It supports a number of effects, transparency (alpha-channel), antialiasing, gradients, vector & font rasterization, etc. You may draw this Image to the window, you may use Image as a label for Button, you may do with it everything you want.
Just execute examples/PainterExamples package to see what Painter is capable for.

So the general answer to your question is "YES, it is possible".
The main problem is efficiency. Rasterizing is "heavy" for CPU. So you have to make a simple etude where you paint some kind of FFT and check if you are pleased with its speed.

My opinion is while your effect resides in the small area of screen (say 128x64 pixels), using Painter will be sufficient enough.

If you want any large, full-screen effects, you should use OpenGL (DHCtrl or something like that - please look at example packages) control and draw everything using OpenGL. It is harder, but the only way to make true dynamic real-time graphics on both Windows/POSIX.

Report message to a moderator