From 5bd467fa17be55397f433dddc065b57cbb7a0615 Mon Sep 17 00:00:00 2001
From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
Date: Thu, 25 Feb 2021 11:06:54 +0100
Subject: Add fl_remove_scale()/fl_restore_scale() to transiently draw without
 scaling factor.

This new API is a response to this message in fltk.general :
Can custom box type functions handle their own high-DPI screen scaling?
---
 FL/Fl_Graphics_Driver.H | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'FL/Fl_Graphics_Driver.H')

diff --git a/FL/Fl_Graphics_Driver.H b/FL/Fl_Graphics_Driver.H
index 8a7a93b6f..fdebd1d50 100644
--- a/FL/Fl_Graphics_Driver.H
+++ b/FL/Fl_Graphics_Driver.H
@@ -364,6 +364,8 @@ public:
   virtual void font_name(int num, const char *name);
   // Defaut implementation may be enough
   virtual void overlay_rect(int x, int y, int w , int h);
+  virtual float remove_scale();
+  virtual void restore_scale(float);
 };
 
 #ifndef FL_DOXYGEN
@@ -486,6 +488,8 @@ protected:
   void transformed_vertex(double xf, double yf);
   virtual void transformed_vertex0(float x, float y);
   void vertex(double x, double y);
+  virtual float remove_scale();
+  virtual void restore_scale(float);
 };
 #endif // FL_DOXYGEN
 
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