Interfacing between Gdk and Cairo.
<c_version>2.16.6</c_version> <group>Cairo</group>
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.
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)
Set the specified Color as the source of Cr.
procedure Set_Source_Pixbuf
(Cr : Cairo_Context;
Pixbuf : Gdk_Pixbuf;
Pixbuf_X : Gdouble;
Pixbuf_Y : Gdouble)
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
a Cairo_Context
a Gdk_Pixbuf
X coordinate of location to place upper left corner of Pixbuf
Y coordinate of location to place upper left corner of Pixbuf
procedure Set_Source_RGBA
(Cr : Cairo_Context;
Color : Gdk.RGBA.Gdk_RGBA)
Set the specified Color as the source of Cr.