Mac OS: exact implementation of the Fl::screen_dpi() function.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@8619 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

3 files changed, 19 insertions, 35 deletions

diff --git a/FL/mac.H b/FL/mac.H
index be64d8ddb..d2398ce12 100644
--- a/FL/mac.H
+++ b/FL/mac.H
@@ -143,7 +143,6 @@ public:
   void contains_GL_subwindow(void);
   void set_key_window(void);
   void set_cursor(Fl_Cursor);
-  static int screen_init(XRectangle screens[], float dpi[]);
   static CGImageRef CGImage_from_window_rect(Fl_Window *win, int x, int y, int w, int h);
   static unsigned char *bitmap_from_window_rect(Fl_Window *win, int x, int y, int w, int h, int *bytesPerPixel);
   static Fl_Region intersect_region_and_rect(Fl_Region current, int x,int y,int w, int h);
diff --git a/src/Fl_cocoa.mm b/src/Fl_cocoa.mm
index 721831079..7ed48cc7c 100644
--- a/src/Fl_cocoa.mm
+++ b/src/Fl_cocoa.mm
@@ -2823,37 +2823,6 @@ void Fl_X::set_cursor(Fl_Cursor c)
   cursor = icrsr;
 }
 
-int Fl_X::screen_init(XRectangle screens[], float dpi[])
-{
-  NSAutoreleasePool *localPool = [[NSAutoreleasePool alloc] init]; 
-  NSArray *a = [NSScreen screens]; 
-  NSScreen *object;
-  int count = (int)[a count]; 
-  NSRect r; 
-  int i, num_screens = 0;
-  for( i = 0; i < count; i++) {
-    object = (NSScreen*)[a objectAtIndex:i];
-    r = [object frame];
-    screens[num_screens].x      = int(r.origin.x);
-    screens[num_screens].y      = int(r.size.height - (r.origin.y + r.size.height));
-    screens[num_screens].width  = int(r.size.width);
-    screens[num_screens].height = int(r.size.height);
-#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_4
-    if ([object respondsToSelector:@selector(userSpaceScaleFactor)]) {
-      dpi[num_screens] = float([object userSpaceScaleFactor])*72.0f;
-    } else 
-#endif
-    {
-      dpi[num_screens] = 72.0f;
-    }
-      	
-    num_screens ++;
-    if (num_screens >= 16) break;
-  }
-  [localPool release];
-  return num_screens;
-}
-
 @interface FLaboutItemTarget : NSObject 
 {
 }
diff --git a/src/screen_xywh.cxx b/src/screen_xywh.cxx
index 3cac43fbb..39b979e07 100644
--- a/src/screen_xywh.cxx
+++ b/src/screen_xywh.cxx
@@ -118,10 +118,25 @@ static void screen_init() {
 }
 #elif defined(__APPLE__)
 static XRectangle screens[16];
-static float dpi[16];
+static float dpi_h[16];
+static float dpi_v[16];
 
 static void screen_init() {
-  num_screens = Fl_X::screen_init(screens, dpi);
+  CGDirectDisplayID displays[16];
+  CGDisplayCount count, i;
+  CGRect r;
+  CGGetActiveDisplayList(16, displays, &count);
+  for( i = 0; i < count; i++) {
+    r = CGDisplayBounds(displays[i]);
+    screens[i].x      = int(r.origin.x);
+    screens[i].y      = int(r.size.height - (r.origin.y + r.size.height));
+    screens[i].width  = int(r.size.width);
+    screens[i].height = int(r.size.height);
+    CGSize s = CGDisplayScreenSize(displays[i]);
+    dpi_h[i] = screens[i].width / (s.width/25.4);
+    dpi_v[i] = screens[i].height / (s.height/25.4);
+  }
+  num_screens = count;
 }
 #elif HAVE_XINERAMA
 #  include <X11/extensions/Xinerama.h>
@@ -338,7 +353,8 @@ void Fl::screen_dpi(float &h, float &v, int n)
   }
 #elif defined(__APPLE__)
   if (n >= 0 && n < num_screens) {
-    h = v = dpi[n];
+    h = dpi_h[n];
+    v = dpi_v[n];
   }
 #elif HAVE_XINERAMA
   if (n >= 0 && n < num_screens) {