----------------------------------------------------------------------- -- GtkAda - Ada95 binding for Gtk+/Gnome -- -- -- -- Copyright (C) 2010-2013, AdaCore -- -- -- -- This library is free software; you can redistribute it and/or -- -- modify it under the terms of the GNU General Public -- -- License as published by the Free Software Foundation; either -- -- version 2 of the License, 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 -- -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -- -- General Public License for more details. -- -- -- -- You should have received a copy of the GNU General Public -- -- License along with this library; if not, write to the -- -- Free Software Foundation, Inc., 59 Temple Place - Suite 330, -- -- Boston, MA 02111-1307, USA. -- -- -- -- As a special exception, if other files instantiate generics from -- -- this unit, or you link this unit with other files to produce an -- -- executable, this unit does not by itself cause the resulting -- -- executable to be covered by the GNU General Public License. This -- -- exception does not however invalidate any other reasons why the -- -- executable file might be covered by the GNU Public License. -- ----------------------------------------------------------------------- -- <description> -- Reading and writing PNG images. -- </description> -- -- <c_version>1.8.8</c_version> -- <group>Cairo</group> package Cairo.Png is
function Write_To_Png
(Surface : Cairo_Surface;
Filename : String)
return Cairo_Status;
-- Surface: a Cairo_Surface with pixel contents -- Filename: the name of a file to write to -- -- Writes the contents of surface to a new file filename as a PNG -- image. -- -- Return value: Cairo_Status_Success if the PNG file was written -- successfully. Otherwise, Cairo_Status_No_Memory if memory could not -- be allocated for the operation or -- Cairo_Status_Surface_Type_Mismatch if the surface does not have -- pixel contents, or Cairo_Status_Write_Error if an I/O error occurs -- while attempting to write the file. function Create_From_Png
(Filename : String)
return Cairo_Surface;
-- Filename: name of PNG file to load -- -- Creates a new image surface and initializes the contents to the -- given PNG file. -- -- Return value: a new Cairo_Surface initialized with the contents -- of the PNG file, or a "nil" surface if any error occurred. A nil -- surface can be checked for with Cairo.Surface.Status (Surface) which -- may return one of the following values: -- -- Cairo_Status_No_Memory -- Cairo_Status_File_Not_Found -- Cairo_Status_Read_Error -- -- Alternatively, you can allow errors to propagate through the drawing -- operations and check the status on the context upon completion -- using Cairo_Status. end Cairo.Png;