From 435d135825fd276edc5246a55f37b6873feb2ae2 Mon Sep 17 00:00:00 2001
From: Manolo Gouy <Manolo>
Date: Wed, 13 Sep 2017 16:15:34 +0000
Subject: SVG support: draw images at full screen resolution also when there
 are several pixels per graphical unit, as with Apple retina displays.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.4@12456 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
---
 FL/Fl_Graphics_Driver.H | 3 ++-
 FL/Fl_Screen_Driver.H   | 3 +++
 2 files changed, 5 insertions(+), 1 deletion(-)

(limited to 'FL')

diff --git a/FL/Fl_Graphics_Driver.H b/FL/Fl_Graphics_Driver.H
index 1a45d375f..1d740a055 100644
--- a/FL/Fl_Graphics_Driver.H
+++ b/FL/Fl_Graphics_Driver.H
@@ -167,7 +167,6 @@ protected:
    */
   virtual void draw(Fl_Bitmap *bm, int XP, int YP, int WP, int HP, int cx, int cy) {}
   virtual void draw(Fl_Shared_Image *shared, int X, int Y);
-  virtual int draw_scaled(Fl_Image *img, int X, int Y, int W, int H);
   virtual void copy_offscreen(int x, int y, int w, int h, Fl_Offscreen pixmap, int srcx, int srcy);
 
   /** Support function for image drawing */
@@ -389,6 +388,8 @@ public:
   virtual const char *font_name(int num) {return NULL;}
   /** Support for Fl::set_font() */
   virtual void font_name(int num, const char *name) {}
+  /** Support function for Fl_Shared_Image drawing */
+  virtual int draw_scaled(Fl_Image *img, int X, int Y, int W, int H);
 };
 
 #ifndef FL_DOXYGEN
diff --git a/FL/Fl_Screen_Driver.H b/FL/Fl_Screen_Driver.H
index 7f229e22b..c3b36779b 100644
--- a/FL/Fl_Screen_Driver.H
+++ b/FL/Fl_Screen_Driver.H
@@ -176,6 +176,9 @@ public:
   /** Returns the platform's support for rescaling the application with ctrl-/+/-/0/ keys.
    */
   virtual APP_SCALING_CAPABILITY rescalable() { return NO_APP_SCALING; }
+  /* Number of pixels per drawing unit for the display.
+     The default implementation may be enough. */
+  virtual float retina_factor() { return 1; }
 };
 
 
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