Capture image of screen/window to make transparent

m2asselin · #1 11-Apr-2009, 17:05

Hello,

I am trying to use fl_read_image() to capture a screen shot of the widgets that I have added to a window, such that I can add an alpha channel and redisplay it, but with some opacity added.

It is not working for me as it only captures the screen beneath my fltk window.

this is the code i have used:

CPP / C++ / C Code:

int main()
{
   Fl_Double_Window win( 100,100,500,500,0 );
   
   Fl_Box box1( FL_RFLAT_BOX, 0,0,200,200,0 );
   Fl_Box box2( FL_ROUNDED_BOX, 250,250,200,200,0 );
   Fl_Button but1( 25,25,100,50,0 );
   win.end();

   win.show();

   uchar *img = fl_read_image( NUL, 100,100,box1.w(),box1.h(),128 );
   Fl_RGB_Image rgbImg( img, box1.w(),box1.h(),4 ); 
   box2.image( rgbImg );

   return Fl::run();
}

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Rate This Thread
Rate This Thread:

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
run script command on ns2.26	newbie06	Computer Software Forum - Linux	65	19-Aug-2009 08:50
I want to make an image transparent	nish	Python Forum	1	09-Nov-2007 12:38
Image onto JFrame	tedds	Java Forum	8	25-Oct-2007 21:04
Photoshop Tutorial: Make An Inspirational/Mystical Picture	ToddSAFM	Graphics Forum	9	09-Aug-2005 21:32