matthiasm wrote: > > On Jul 8, 2007, at 3:14 PM, Hans George wrote: > >> Hello FLTK-experts! >> >> I?ve got a "simple" question: Is there a way to brighten a specific >> area of a images with fltk2? >> >> For example: >> I`ve got a window with a background image. When the mouse enters a >> specific area of this image, than this area should be brighten. >> >> I couldn`t find a helpfull methode in the draw.h ... > > Fl_RGB_Image (or the correspoding FLTK2 interfaces) has a method > "darken". You could copy that and write a "lighten" function. Then write > a custom "draw()" function. When you need to highlight the rectangle, > draw the whole original image first, then us fl_draw_image again to draw > the subarea of the brighter image over the old image. > > To draw a subrectangle, you have to juggle with pointers and coordinates > a little. > ...
Or you could just draw the lighter image, clip inside this rect, and then draw the normal image. No juggling and more than likely faster... :) -- ______________________________________________________________________ Michael Sweet, Easy Software Products mike at easysw dot com Internet Printing and Document Software http://www.easysw.com _______________________________________________ fltk mailing list [email protected] http://lists.easysw.com/mailman/listinfo/fltk
