From dbde470f8d9803d6986ff57b7dfcb40d679508b7 Mon Sep 17 00:00:00 2001
From: Manolo Gouy <Manolo>
Date: Tue, 10 Mar 2015 21:06:22 +0000
Subject: Added Fl_Shared_Image::scale(width, height) to support scaled image
 drawing (STR #3185). Useful for printing, PostScript or PDF output, or retina
 displays.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@10615 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
---
 FL/Fl_Shared_Image.H | 22 +++++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)

(limited to 'FL/Fl_Shared_Image.H')

diff --git a/FL/Fl_Shared_Image.H b/FL/Fl_Shared_Image.H
index bcb41219f..5f96f7f2d 100644
--- a/FL/Fl_Shared_Image.H
+++ b/FL/Fl_Shared_Image.H
@@ -3,7 +3,7 @@
 //
 // Shared image header file for the Fast Light Tool Kit (FLTK).
 //
-// Copyright 1998-2010 by Bill Spitzak and others.
+// Copyright 1998-2015 by Bill Spitzak and others.
 //
 // This library is free software. Distribution and use rights are outlined in
 // the file "COPYING" which should have been included with this file.  If this
@@ -41,7 +41,12 @@ class FL_EXPORT Fl_Shared_Image : public Fl_Image {
   
   friend class Fl_JPEG_Image;
   friend class Fl_PNG_Image;
-
+  
+private:
+  static Fl_RGB_Scaling scaling_algorithm_; // method used to rescale RGB source images
+#if FLTK_ABI_VERSION >= 10304
+  Fl_Image *scaled_image_;
+#endif
 protected:
 
   static Fl_Shared_Image **images_;	// Shared images
@@ -66,7 +71,7 @@ protected:
   void add();
   void update();
 
-  public:
+public:
   /** Returns the filename of the shared image */
   const char	*name() { return name_; }
   /** Returns the number of references of this shared image. When reference is below 1, the image is deleted. */
@@ -80,14 +85,25 @@ protected:
   virtual void desaturate();
   virtual void draw(int X, int Y, int W, int H, int cx, int cy);
   void draw(int X, int Y) { draw(X, Y, w(), h(), 0, 0); }
+  void scale(int width, int height, int proportional = 1, int can_expand = 0);
   virtual void uncache();
 
   static Fl_Shared_Image *find(const char *n, int W = 0, int H = 0);
   static Fl_Shared_Image *get(const char *n, int W = 0, int H = 0);
+  static Fl_Shared_Image *get(Fl_RGB_Image *rgb, int own_it = 1);
   static Fl_Shared_Image **images();
   static int		num_images();
   static void		add_handler(Fl_Shared_Handler f);
   static void		remove_handler(Fl_Shared_Handler f);
+  /** Sets what algorithm is used when resizing a source image.
+   The default algorithm is FL_RGB_SCALING_BILINEAR.
+   Drawing an Fl_Shared_Image is sometimes performed by first resizing the source image
+   and then drawing the resized copy. This occurs, e.g., when drawing to screen under Linux or MSWindows
+   after having called Fl_Shared_Image::scale().
+   This function controls what method is used when the image to be resized is an Fl_RGB_Image.
+   \version 1.3.4 and requires compiling with FLTK_ABI_VERSION = 10304
+   */
+  static void scaling_algorithm(Fl_RGB_Scaling algorithm) {scaling_algorithm_ = algorithm; }
 };
 
 //
-- 
cgit v1.2.3