0.1 Graph cube

src/window.c

@@ -0,0 +1,51 @@
+#include <GLFW/glfw3.h>
+#include "main.h"
+
+void window_callback( GLFWwindow * window, int w, int h )
+{
+	int m = ( w<h )? w: h;
+
+	glViewport( (w-m)/2, (h-m)/2, m, m );
+}
+
+window_t init_window( unsigned int w, unsigned int h, const char * name )
+{
+	void * window;
+
+	if( !glfwInit() )
+		return NULL;
+
+	glfwWindowHint( GLFW_CONTEXT_VERSION_MAJOR, 3 );
+	glfwWindowHint( GLFW_CONTEXT_VERSION_MINOR, 3 );
+	glfwWindowHint( GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE );
+
+	window = glfwCreateWindow( w, h, name, NULL, NULL );
+
+	if( !window )
+	{
+		glfwTerminate();
+		return NULL;
+	}
+
+	glfwSetWindowSizeCallback( window, window_callback );
+
+	return window;
+}
+
+void use_window( window_t window )
+{
+	glfwMakeContextCurrent( (void*)window );
+}
+
+int is_open_window( window_t window )
+{
+	glfwSwapBuffers( (void*)window );
+	glfwPollEvents();
+	return !glfwWindowShouldClose( (void*)window );
+}
+
+void close_window( window_t window )
+{
+	glfwDestroyWindow( (void*)window );
+	glfwTerminate();
+}