Changed OpenGL support for the Mac OS X platform: use cocoa instead of deprecated AGL.

All changes are mac-specific, except a very minor change in file src/gl_draw.cxx
where string drawing wrongly claimed to support @symbol, not possible
because symbols are drawn using non-GL primitives.

Unchanged application code can use the new FLTK code.
In addition, the new code allows mac applications to draw OpenGL scenes
at high resolution on so-called 'retina' displays, but this requires some
support from app code. They must call, before opening GL windows,
Fl::use_high_resolution(1);
and change their glViewport() calls as follows
glViewport(0, 0, pxel_w(), pixel_h());
This uses 2 new member functions of the Fl_Gl_Window class,
pixel_w() and pixel_h() returning the window dimensions in pixel
units, that is, twice the w() and h() when the window is mapped
on a retina display.


git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@10498 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

1 files changed, 14 insertions, 4 deletions

diff --git a/src/glut_compatability.cxx b/src/glut_compatability.cxx
index eadf43c59..1f1d6a6ff 100644
--- a/src/glut_compatability.cxx
+++ b/src/glut_compatability.cxx
@@ -38,6 +38,9 @@
 #    include <dlfcn.h>
 #  endif // HAVE_DLFCN_H
 #  define MAXWINDOWS 32
+#  ifdef __APPLE__
+#    include <FL/x.H>
+#  endif
 static Fl_Glut_Window *windows[MAXWINDOWS+1];
 
 static void (*glut_idle_func)() = 0; // global glut idle function
@@ -59,7 +62,7 @@ static int indraw;
 void Fl_Glut_Window::draw() {
   glut_window = this;
   indraw = 1;
-  if (!valid()) {reshape(w(),h()); valid(1);}
+  if (!valid()) {reshape(pixel_w(),pixel_h()); valid(1);}
   display();
   indraw = 0;
 }
@@ -70,7 +73,7 @@ void glutSwapBuffers() {
 
 void Fl_Glut_Window::draw_overlay() {
   glut_window = this;
-  if (!valid()) {reshape(w(),h()); valid(1);}
+  if (!valid()) {reshape(pixel_w(),pixel_h()); valid(1);}
   overlaydisplay();
 }
 
@@ -80,6 +83,13 @@ int Fl_Glut_Window::handle(int event) {
   make_current();
   int ex = Fl::event_x();
   int ey = Fl::event_y();
+#ifdef __APPLE__
+  if (shown()) {
+    int factor = Fl_X::resolution_scaling_factor(this);
+    ex *= factor;
+    ey *= factor;
+  }
+#endif
   int button;
   switch (event) {
 
@@ -377,8 +387,8 @@ int glutGet(GLenum type) {
   case GLUT_RETURN_ZERO: return 0;
   case GLUT_WINDOW_X: return glut_window->x();
   case GLUT_WINDOW_Y: return glut_window->y();
-  case GLUT_WINDOW_WIDTH: return glut_window->w();
-  case GLUT_WINDOW_HEIGHT: return glut_window->h();
+  case GLUT_WINDOW_WIDTH: return glut_window->pixel_w();
+  case GLUT_WINDOW_HEIGHT: return glut_window->pixel_h();
   case GLUT_WINDOW_PARENT:
     if (glut_window->parent())
       return ((Fl_Glut_Window *)(glut_window->parent()))->number;