Make Fl_Gl_Window::pixels_per_unit() return a float (rather than int) value.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3-porting@11794 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

FL/Fl_Gl_Window.H

@@ -208,7 +208,7 @@ public:
   // Note: Doxygen docs in Fl_Widget.H to avoid redundancy.
   virtual Fl_Gl_Window* as_gl_window() {return this;}
   
-  int pixels_per_unit();
+  float pixels_per_unit();
   /** Gives the window width in OpenGL pixels.
    Generally identical with the result of the w() function, but for a window mapped to
    an Apple 'retina' display, and if Fl::use_high_res_GL(bool) is set to true,
@@ -216,7 +216,7 @@ public:
    between low and high resolution displays and automatically adjusts the returned value.
    \version 1.3.4
    */
-  int pixel_w() { return pixels_per_unit() * w(); }
+  int pixel_w() { return int(pixels_per_unit() * w() + 0.5f); }
   /** Gives the window height in OpenGL pixels.
    Generally identical with the result of the h() function, but for a window mapped to
    an Apple 'retina' display, and if Fl::use_high_res_GL(bool) is set to true,
@@ -224,7 +224,7 @@ public:
    between low and high resolution displays and automatically adjusts the returned value.
    \version 1.3.4
    */
-  int pixel_h() { return pixels_per_unit() * h(); }
+  int pixel_h() { return int(pixels_per_unit() * h() + 0.5f); }
   
   ~Fl_Gl_Window();
   /**

FL/Fl_Gl_Window_Driver.H

@@ -49,7 +49,7 @@ public:
   virtual ~Fl_Gl_Window_Driver() {}
   static Fl_Gl_Window_Driver *newGlWindowDriver(Fl_Gl_Window *w);
   static Fl_Gl_Window_Driver *global();
-  virtual int pixels_per_unit() {return 1;}
+  virtual float pixels_per_unit() {return 1;}
   virtual void before_show(int& need_redraw) {}
   virtual void after_show(int need_redraw) {}
   virtual void invalidate();
@@ -95,7 +95,7 @@ class NSOpenGLPixelFormat;
 class Fl_Cocoa_Gl_Window_Driver : public Fl_Gl_Window_Driver {
   friend class Fl_Gl_Window_Driver;
   Fl_Cocoa_Gl_Window_Driver(Fl_Gl_Window *win) : Fl_Gl_Window_Driver(win) {}
-  virtual int pixels_per_unit();
+  virtual float pixels_per_unit();
   virtual void before_show(int& need_redraw);
   virtual void after_show(int need_redraw);
   virtual int mode_(int m, const int *a);

examples/OpenGL3test.cxx

@@ -167,7 +167,7 @@ public:
       data[0] *= factor;
       glBufferSubData(GL_ARRAY_BUFFER, 24*sizeof(GLfloat), 4*sizeof(GLfloat), data);
       redraw();
-      add_output("push  Fl_Gl_Window::pixels_per_unit()=%d\n", pixels_per_unit());
+      add_output("push  Fl_Gl_Window::pixels_per_unit()=%.1f\n", pixels_per_unit());
       return 1;
     }
     return Fl_Gl_Window::handle(event);

src/Fl_Gl_Window.cxx

@@ -404,7 +404,7 @@ int Fl_Gl_Window::gl_plugin_linkage() {
  Fl::event_y() to the pixel units used by the OpenGL source code.
  \version 1.3.4
  */
-int Fl_Gl_Window::pixels_per_unit() {
+float Fl_Gl_Window::pixels_per_unit() {
   return pGlWindowDriver->pixels_per_unit();
 }
 
@@ -470,7 +470,7 @@ void Fl_Cocoa_Gl_Window_Driver::after_show(int need_redraw) {
   if(need_redraw) pWindow->redraw();//necessary only after creation of a top-level GL window
 }
 
-int Fl_Cocoa_Gl_Window_Driver::pixels_per_unit()
+float Fl_Cocoa_Gl_Window_Driver::pixels_per_unit()
 {
   return (fl_mac_os_version >= 100700 && Fl::use_high_res_GL() && Fl_X::i(pWindow) &&
           Fl_Cocoa_Window_Driver::driver(pWindow)->mapped_to_retina()) ? 2 : 1;

src/drivers/OpenGL/Fl_OpenGL_Display_Device.cxx

@@ -63,7 +63,7 @@ static uchar *convert_BGRA_to_RGB(uchar *baseAddress, int w, int h, int mByteWid
 
 Fl_RGB_Image* Fl_OpenGL_Display_Device::capture_gl_rectangle(Fl_Gl_Window* glw, int x, int y, int w, int h)
 {
-  int factor = glw->pixels_per_unit();
+  float factor = glw->pixels_per_unit();
   if (factor > 1) {
     w *= factor; h *= factor; x *= factor; y *= factor;
   }

src/glut_compatability.cxx

@@ -74,9 +74,9 @@ int Fl_Glut_Window::handle(int event) {
   make_current();
   int ex = Fl::event_x();
   int ey = Fl::event_y();
-  int factor = pixels_per_unit();
+  float factor = pixels_per_unit();
-  ex *= factor;
+  ex = int(ex * factor + 0.5f);
-  ey *= factor;
+  ey = int(ey * factor + 0.5f);
   int button;
   switch (event) {