I pasted that into fltk-1.3.x on win/linux/mac. Looked good on win+linux; the lower right corner of the border was a sharp corner, no pixel hole at the extreme corner, and no weird artifacts on the vertical edge.
On the mac, I do get the weird artifacts similar to your pic. These tests are all with the default build of fltk-1.3.x. On the mac, it would appear the border is being drawn as an antialiased line (?), and because of that is maybe revealing an extra vertical pixel row of your graph because part of the border is 'transparent' (due to the anti aliasing). This might be the fl_line_sytle(FL_SOLID, 2) call causing a floating point antialiased rectangle to be drawn, where the pixel centers might be off by 0.5 or something. Macs are pretty smart about antialiased lines and stuff. As a workaround, maybe don't change the fl_line_style(), and draw two separate fl_rect()s to achieve the two pixel thick border. Jane wrote: > On 2008-12-19, Albrecht Schlosser <[email protected]> wrote: >> I'm not aware of such display anomalities, but they can be there... >> >> Could you please post a short (but complete) source file that shows the >> effect so >> that we can see _what_ you are doing exactly, and maybe test it? >> >> Albrecht > > hey Albrecht, this should do it. its only the relevant > drawing code. its ugly and i had no time to fix that yet. > ;) > note: i have found that (on mac) linking against an fltk > lib that uses the other renderer (not Quartz) this code > draws like expected, like on the win/linux shots. so the > problem most likely is somewhere inside the Quartz code. > > > > #include <FL/Fl.H> > #include <FL/Fl_Double_Window.H> > #include <FL/fl_draw.H> > #include <FL/Fl_Box.H> > > class Envelope_Editor: public Fl_Box > { > void draw(); > int ee_x0, ee_y0, ee_w, ee_h; > double zoomlevel; > enum > { > vol, fil, aux > }; > public: > Envelope_Editor(int x, int y, int w, int h, char* const label = 0) : > Fl_Box(x, y, w, h, label) > { > ee_x0 = this->x() + Fl::box_dx(this->box()) + 9; > ee_y0 = this->y() + Fl::box_dy(this->box()) + 9; > ee_w = 381; // 3 * 127 > ee_h = 225; // +/- 100 + 20 header + 5 space > zoomlevel = 2; > } > }; > > void Envelope_Editor::draw() > { > // 0.0 position of coordinate system > int x0 = ee_x0; > int y0 = ee_y0 + 125; // 100 + 20 (20 pixel for header, 5 pixel space) > // background > fl_color(FL_BLACK); > fl_rectf(ee_x0, ee_y0 + 25, ee_w, ee_h - 24); > // coordinate system > fl_color(50, 50, 50); > int x_val = x0; > while ((x_val - x0) / zoomlevel < ee_w / zoomlevel) > { > fl_line(x_val, y0 - 100, x_val, y0 + 100); > x_val += 10 * zoomlevel; > } > for (int i = 0; i < 21; i++) > fl_line(x0, y0 - 100 + 10 * i, ee_w + ee_x0, y0 - 100 + 10 * i); > fl_color(80, 80, 80); > fl_line(x0 + 1, y0, x0 + ee_w - 2, y0); > // frame > fl_color(fl_darker(FL_BACKGROUND_COLOR)); > fl_line_style(FL_SOLID, 2); > fl_rect(ee_x0 - 1, ee_y0 + 24, ee_w + 3, ee_h - 21); > } > > int main(int argc, char *argv[]) > { > Fl_Double_Window* w; > { Fl_Double_Window* o = new Fl_Double_Window(400, 240); > w = o; > { Envelope_Editor* o = new Envelope_Editor(1, 1, 381, 225, 0); > o->box(FL_NO_BOX); > } > o->end(); > o->show(); > } > return Fl::run(); > } > _______________________________________________ fltk mailing list [email protected] http://lists.easysw.com/mailman/listinfo/fltk
