Added SFML::Context to the sfml-window library.

git-svn-id: https://sfml.svn.sourceforge.net/svnroot/sfml/branches/sfml2@1600 4e206d99-4929-0410-ac5d-dfc041789085

ruby/sfml-window/window/Context.cpp

@@ -0,0 +1,122 @@
+/* rbSFML - Copyright (c) 2010 Henrik Valter Vogelius Hansson - groogy@groogy.se
+ * This software is provided 'as-is', without any express or
+ * implied warranty. In no event will the authors be held
+ * liable for any damages arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute
+ * it freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented;
+ *    you must not claim that you wrote the original software.
+ *    If you use this software in a product, an acknowledgment
+ *    in the product documentation would be appreciated but
+ *    is not required.
+ *
+ * 2. Altered source versions must be plainly marked as such,
+ *    and must not be misrepresented as being the original software.
+ *
+ * 3. This notice may not be removed or altered from any
+ *    source distribution.
+ */
+ 
+#include "Context.hpp"
+#include "main.hpp"
+#include <SFML/Window/Context.hpp>
+
+/* If you need to make OpenGL / graphics calls without having an active window 
+ * (like in a thread), you can use an instance of this class to get a valid context.
+ *
+ * Having a valid context is necessary for *every* OpenGL call, and for most of 
+ * the classes from the Graphics package.
+ *
+ * Note that a context is only active in its current thread, if you create a new
+ * thread it will have no valid context by default.
+ *
+ * To use a sf::Context instance, just construct it and let it live as long as 
+ * you need a valid context. No explicit activation is needed, all it has to do 
+ * is to exist. Its destructor will take care of deactivating and freeing all 
+ * the attached resources.
+ */
+VALUE globalContextClass;
+
+/* Free a heap allocated object 
+ * Not accessible trough ruby directly!
+ */
+static void Context_Free( sf::Context *anObject )
+{
+	delete anObject;
+}
+
+/* call-seq:
+ *   context.SetActive(bool)	-> nil
+ *
+ * Activate or deactivate explicitely the context.
+ */
+static VALUE Context_SetActive( VALUE self, VALUE anArgument )
+{
+	sf::Context *object = NULL;
+	Data_Get_Struct( self, sf::Context, object );
+	switch( anArgument )
+	{
+		case Qtrue:
+			object->SetActive( true );
+			break;
+		case Qfalse:
+			object->SetActive( false );
+			break;
+		default:
+			rb_raise( rb_eRuntimeError, "expected true or false" );
+	}
+	return Qnil;
+}
+
+/* call-seq:
+ *   Context.SetReferenceActive()	-> true or false
+ *
+ * This function is meant to be called internally; it is used to deactivate the 
+ * current context by activating another one (so that we still have an active 
+ * context on the current thread).
+ */
+static VALUE Context_SetReferenceActive( VALUE aKlass )
+{
+	if( sf::Context::SetReferenceActive() == true )
+	{
+		return Qtrue;
+	}
+	else
+	{
+		return Qfalse;
+	}
+}
+
+/* call-seq:
+ *   Context.new()		-> context
+ *
+ * The constructor creates and activates the context
+ */
+static VALUE Context_New( VALUE aKlass )
+{
+	sf::Context *object = new sf::Context();
+	VALUE rbData = Data_Wrap_Struct( aKlass, 0, Context_Free, object );
+	rb_obj_call_init( rbData, 0, 0 );
+	return rbData;
+}
+
+void Init_Context( void )
+{
+	globalContextClass = rb_define_class_under( GetNamespace(), "Context", rb_cObject );
+	
+	// Class methods
+	rb_define_singleton_method( globalContextClass, "new", FUNCPTR( Context_New ), 0 );
+	rb_define_singleton_method( globalContextClass, "setReferenceActive", FUNCPTR( Context_SetReferenceActive ), 0 );
+	
+	// Instance methods
+	rb_define_method( globalContextClass, "setActive", FUNCPTR( Context_SetActive ), 1 );
+	
+	// Aliases
+	rb_define_alias( globalContextClass, "active=", "setActive" );
+	rb_define_alias( globalContextClass, "set_active", "setActive" );
+	
+	rb_define_alias( CLASS_OF( globalContextClass ), "set_reference_active", "setReferenceActive" );
+}

ruby/sfml-window/window/Context.hpp

@@ -0,0 +1,31 @@
+/* rbSFML - Copyright (c) 2010 Henrik Valter Vogelius Hansson - groogy@groogy.se
+ * This software is provided 'as-is', without any express or
+ * implied warranty. In no event will the authors be held
+ * liable for any damages arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute
+ * it freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented;
+ *    you must not claim that you wrote the original software.
+ *    If you use this software in a product, an acknowledgment
+ *    in the product documentation would be appreciated but
+ *    is not required.
+ *
+ * 2. Altered source versions must be plainly marked as such,
+ *    and must not be misrepresented as being the original software.
+ *
+ * 3. This notice may not be removed or altered from any
+ *    source distribution.
+ */
+
+#ifndef SFML_RUBYEXT_CONTEXT_HEADER_
+#define SFML_RUBYEXT_CONTEXT_HEADER_
+
+#include "ruby.h"
+
+// Ruby initiation function
+void Init_Context( void );
+
+#endif // SFML_RUBYEXT_CONTEXT_HEADER_

ruby/sfml-window/window/main.cpp

@@ -21,6 +21,7 @@
  */
  
 #include "main.hpp"
+#include "Context.hpp"
 
 VALUE globalSFMLNamespace;
 
@@ -33,4 +34,5 @@ void Init_window( void )
 {
 	globalSFMLNamespace = rb_define_module( "SFML" );
 	rb_define_const(globalSFMLNamespace, "WindowLoaded", Qtrue);
+	Init_Context();
 }