/usr/share/ada/adainclude/gtkada/gdk-cairo.ads is in libgtkada16.1.0-dev 17.0.2017-2.
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-- GtkAda - Ada95 binding for Gtk+/Gnome --
-- --
-- Copyright (C) 2010-2017, AdaCore --
-- --
-- This library is free software; you can redistribute it and/or modify it --
-- under terms of the GNU General Public License as published by the Free --
-- Software Foundation; either version 3, or (at your option) any later --
-- version. This library is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHAN- --
-- TABILITY or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- --
-- --
-- --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
------------------------------------------------------------------------------
-- <description>
-- Interfacing between Gdk and Cairo.
-- </description>
--
-- <c_version>2.16.6</c_version>
-- <group>Cairo</group>
with Glib; use Glib;
with Cairo; use Cairo;
with Gdk.Color; use Gdk.Color;
with Gdk.Pixbuf; use Gdk.Pixbuf;
with Gdk.RGBA; use Gdk.RGBA;
package Gdk.Cairo is
function Create (Window : Gdk.Gdk_Window) return Cairo_Context;
-- Creates a Cairo context for drawing to Drawable.
--
-- Note that due to double-buffering, Cairo contexts created
-- in a GTK+ expose event handler cannot be cached and reused
-- between different expose events.
--
-- Returns a newly created Cairo context. The result should be freed with
-- Cairo.Destroy.
procedure Set_Source_Pixbuf
(Cr : Cairo_Context;
Pixbuf : Gdk_Pixbuf;
Pixbuf_X : Gdouble;
Pixbuf_Y : Gdouble);
-- Cr: a Cairo_Context
-- Pixbuf: a Gdk_Pixbuf
-- Pixbuf_X: X coordinate of location to place upper left corner of Pixbuf
-- Pixbuf_Y: Y coordinate of location to place upper left corner of Pixbuf
--
-- Sets the given pixbuf as the source pattern for the Cairo context.
-- The pattern has an extend mode of CAIRO_EXTEND_NONE and is aligned
-- so that the origin of Pixbuf is Pixbuf_X, Pixbuf_Y
function Create_From_Pixbuf
(Pixbuf : Gdk_Pixbuf;
Scale : Gint;
For_Window : Gdk.Gdk_Window := null) return Cairo_Surface;
-- Creates an image surface with the same contents as the pixbuf.
-- This is similar to the work done by Set_Source_Pixbuf, but allows you
-- to specify the scale factor for the screen, i.e. adapt to high-dpi
-- (Retina) screens.
-- You can then use Gtk.Style_Context.Render_Icon_Surface to paint the
-- surface onto a Cairo_Context, and then destroy the surface.
-- See also the convenient wrapper Gtkada.Style.Draw_Pixbuf_With_Scale.
procedure Set_Source_Color
(Cr : Cairo_Context;
Color : Gdk_Color);
procedure Set_Source_RGBA
(Cr : Cairo_Context;
Color : Gdk.RGBA.Gdk_RGBA);
-- Set the specified Color as the source of Cr.
private
pragma Import (C, Set_Source_Color, "gdk_cairo_set_source_color");
end Gdk.Cairo;
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