1. ----------------------------------------------------------------------- 
  2. --               GtkAda - Ada95 binding for Gtk+/Gnome               -- 
  3. --                                                                   -- 
  4. --                 Copyright (C) 2010-2013, AdaCore                  -- 
  5. --                                                                   -- 
  6. -- This library is free software; you can redistribute it and/or     -- 
  7. -- modify it under the terms of the GNU General Public               -- 
  8. -- License as published by the Free Software Foundation; either      -- 
  9. -- version 2 of the License, or (at your option) any later version.  -- 
  10. --                                                                   -- 
  11. -- This library is distributed in the hope that it will be useful,   -- 
  12. -- but WITHOUT ANY WARRANTY; without even the implied warranty of    -- 
  13. -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU -- 
  14. -- General Public License for more details.                          -- 
  15. --                                                                   -- 
  16. -- You should have received a copy of the GNU General Public         -- 
  17. -- License along with this library; if not, write to the             -- 
  18. -- Free Software Foundation, Inc., 59 Temple Place - Suite 330,      -- 
  19. -- Boston, MA 02111-1307, USA.                                       -- 
  20. --                                                                   -- 
  21. -- As a special exception, if other files instantiate generics from  -- 
  22. -- this unit, or you link this unit with other files to produce an   -- 
  23. -- executable, this  unit  does not  by itself cause  the resulting  -- 
  24. -- executable to be covered by the GNU General Public License. This  -- 
  25. -- exception does not however invalidate any other reasons why the   -- 
  26. -- executable file  might be covered by the  GNU Public License.     -- 
  27. ----------------------------------------------------------------------- 
  28.  
  29. --  <description> 
  30. --  Interfacing between Gdk and Cairo. 
  31. --  </description> 
  32. -- 
  33. --  <c_version>2.16.6</c_version> 
  34. --  <group>Cairo</group> 
  35.  
  36. with Glib;         use Glib; 
  37. with Cairo;        use Cairo; 
  38. with Gdk.Color;    use Gdk.Color; 
  39. with Gdk.Pixbuf;   use Gdk.Pixbuf; 
  40.  
  41. package Gdk.Cairo is 
  42.  
  43.    function Create (Drawable : Gdk_Drawable) return Cairo_Context; 
  44.    --  Creates a Cairo context for drawing to Drawable. 
  45.    -- 
  46.    --  Note that due to double-buffering, Cairo contexts created 
  47.    --  in a GTK+ expose event handler cannot be cached and reused 
  48.    --  between different expose events. 
  49.    -- 
  50.    --  Returns a newly created Cairo context. The result should be freed with 
  51.    --  Cairo.Destroy. 
  52.  
  53.    procedure Set_Source_Pixmap 
  54.      (Cr       : Cairo_Context; 
  55.       Pixmap   : Gdk_Drawable; 
  56.       Pixmap_X : Gdouble; 
  57.       Pixmap_Y : Gdouble); 
  58.    --  Cr: a Cairo_Context 
  59.    --  Pixmap: a Gdk_Pixmap 
  60.    --  Pixmap_X: X coordinate of location to place upper left corner of Pixmap 
  61.    --  Pixmap_Y: Y coordinate of location to place upper left corner of Pixmap 
  62.    -- 
  63.    --  Sets the given pixmap as the source pattern for the Cairo context. 
  64.    --  The pattern has an extend mode of CAIRO_EXTEND_NONE and is aligned 
  65.    --  so that the origin of Pixmap is Pixmap_X, Pixmap_Y 
  66.  
  67.    procedure Set_Source_Pixbuf 
  68.      (Cr       : Cairo_Context; 
  69.       Pixbuf   : Gdk_Pixbuf; 
  70.       Pixbuf_X : Gdouble; 
  71.       Pixbuf_Y : Gdouble); 
  72.    --  Cr: a Cairo_Context 
  73.    --  Pixbuf: a Gdk_Pixbuf 
  74.    --  Pixbuf_X: X coordinate of location to place upper left corner of Pixbuf 
  75.    --  Pixbuf_Y: Y coordinate of location to place upper left corner of Pixbuf 
  76.    -- 
  77.    --  Sets the given pixbuf as the source pattern for the Cairo context. 
  78.    --  The pattern has an extend mode of CAIRO_EXTEND_NONE and is aligned 
  79.    --  so that the origin of Pixbuf is Pixbuf_X, Pixbuf_Y 
  80.  
  81.    procedure Set_Source_Color 
  82.      (Cr       : Cairo_Context; 
  83.       Color    : Gdk_Color); 
  84.    --  Set the specified Color as the source of Cr. 
  85.  
  86. private 
  87.    pragma Import (C, Set_Source_Pixmap, "gdk_cairo_set_source_pixmap"); 
  88.    pragma Import (C, Set_Source_Color, "gdk_cairo_set_source_color"); 
  89. end Gdk.Cairo;