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Add screen scaling support to Fl_Cairo_Window under X11 platform.

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This commit is contained in:
ManoloFLTK 2020-02-09 07:52:20 +01:00
parent 83bd04e0a3
commit d6aa3a67a0
1 changed files with 13 additions and 4 deletions
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17
cairo/Fl_Cairo.cxx
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@ -84,11 +84,20 @@ cairo_t * Fl::cairo_make_current(Fl_Window* wi) {
cairo_state_.window(wi);
#if defined(USE_X11)
return Fl::cairo_make_current(0, wi->w(), wi->h());
#else
return Fl::cairo_make_current(fl_gc, wi->w(), wi->h());
cairo_t * cairo_ctxt;
#ifndef __APPLE__
float scale = Fl::screen_scale(wi->screen_num()); // get the screen scaling factor
#endif
#if defined(USE_X11)
cairo_ctxt = Fl::cairo_make_current(0, wi->w() * scale, wi->h() * scale);
#else
// on macOS, scaling is done before by Fl_Window::make_current(), on Windows, the size is not used
cairo_ctxt = Fl::cairo_make_current(fl_gc, wi->w(), wi->h());
#endif
#ifndef __APPLE__
cairo_scale(cairo_ctxt, scale, scale);
#endif
return cairo_ctxt;
}
/*