>> It would really help if you send us a small non working
>> example of your code :)
>
> OK :-)
>
> I'm not near a Mac right now, I'll try and put something together
> later
> on and post it...
> It may not be all that small, given the complexity of pulling in
> all the
> Cairo cruft and etc.!
Right, as requested, here's a "minimal" example - but still quite
long - of my cairo window Not Working on OSX.
This code works "fine" on linux, does not work on OSX, and has not
been tested on win32 (although I coded in the hooks so folks can see
what I was doing.) The "real" code does work fine on win32 so this
may also.
The base widget from which I derive my "cairo test window" can be
either Fl_Window or Fl_Box depending on setting the WIN_BASE define
at compile time.
On a good day, this draws a 70% alpha red triangle pointing upwards.
----------------------
#include <FL/Fl.H>
#include <FL/Fl_Window.H>
#include <FL/Fl_Double_Window.H>
#include <FL/Fl_Box.H>
#include <FL/x.H>
#include <FL/fl_draw.H>
# include <cairo.h>
# ifdef WIN32
# include <cairo-win32.h>
# elif defined (__APPLE__)
# include <cairo-quartz.h>
# else
# include <cairo-xlib.h>
# endif
#ifdef WIN_BASE
# warning Fl_Window base
# define BOX Fl_Window
#else
# define BOX Fl_Box
#endif
class test_box : public BOX {
void draw(void); // draw method
cairo_surface_t *surface;
cairo_t *cairo_context;
public:
// constructor
test_box(int x, int y, int w, int h) : BOX(x,y,w,h) { }
};
void test_box::draw(void)
{
#ifdef WIN_BASE
int xo = 0; // origin is (0,0) for Fl_Window
int yo = 0;
#else
int xo = x(); // origin is current window position for Fl_Box
int yo = y();
#endif
int wo = w();
int ho = h();
#ifdef WIN32
#warning win32 mode
/* Get a Cairo surface for the current DC */
HDC dc = fl_gc; /* Exported by fltk */
context->surface = cairo_win32_surface_create(dc);
#elif defined (__APPLE__)
#warning Apple Quartz mode
/* Get a Cairo surface for the current CG context */
CGContext *ctx = fl_gc;
surface = cairo_quartz_surface_create_for_cg_context(ctx, wo, ho);
#else
#warning X windows mode
/* Get a Cairo surface for the current display */
surface = cairo_xlib_surface_create(fl_display, fl_window, fl_visual-
>visual, wo, ho);
#endif
/* Store the cairo context */
cairo_context = cairo_create(surface);
#ifdef __APPLE___
// cairo_scale(cairo_context, 1, -1);
#endif
/* All Cairo co-ordinates are shifted by 0.5 pixels to correct anti-
aliasing */
cairo_translate(cairo_context, 0.5, 0.5);
int x1, y1, x2, y2, x3, y3;
x1 = xo + wo/2; y1 = yo;
x2 = xo + wo; y2 = yo + ho;
x3 = xo; y3 = y2;
// draw a 70% red triangle pointng upwards
cairo_set_source_rgba(cairo_context, 1.0, 0.0, 0.0, 0.7);
cairo_new_path(cairo_context);
cairo_move_to(cairo_context, x1, y1);
cairo_line_to(cairo_context, x2, y2);
cairo_line_to(cairo_context, x3, y3);
cairo_line_to(cairo_context, x1, y1);
cairo_fill(cairo_context);
cairo_destroy(cairo_context);
cairo_surface_destroy(surface);
} // draw method
Fl_Double_Window *main_win=(Fl_Double_Window *)0;
test_box *test=(test_box *)0;
int main(int argc, char **argv) {
main_win = new Fl_Double_Window(547, 469, "Cairo Triangle");
main_win->end();
main_win->resizable(main_win);
main_win->show(argc, argv);
Fl::check();
main_win->begin();
test = new test_box(25, 25, 485, 386);
test->box(FL_FLAT_BOX);
main_win->end();
test->show();
return Fl::run();
}
/* end of file */
----------------------
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