image processing with qtopengl

[sisilet]

hi, I'm writing an application which have one photo overlaying another photo. I want to have some alpha blending effect. should i use the alpha blending feature provided by opengl? If i just use the alpha blending feature, is it worth to build with qtopengl? what's the cost in terms of binary size and performance? thx

[amoswood]

Qt seems to support photo manipulation and blending quite nicely. Combined with the ability to do threaded work, I don't think that you will need any OpenGL. For image manipulation, see their example http://doc.trolltech.com/4.5/paintin...mposition.html.

Happy image processing!