From 768f80a3629bfe95d62f5acab09fcb2d8f38cca7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nicol=C3=A1s=20Ortega=20Froysa?=
 <nortega@themusicinnoise.net>
Date: Sun, 25 Mar 2018 14:27:10 +0200
Subject: [PATCH] Create a display.

---
 CMakeLists.txt |  3 ++-
 src/display.c  | 35 +++++++++++++++++++++++++++++++++++
 src/display.h  | 34 ++++++++++++++++++++++++++++++++++
 src/globals.h  |  6 ++++++
 src/main.c     | 34 ++++++++++++++++++++++++++++++++--
 5 files changed, 109 insertions(+), 3 deletions(-)
 create mode 100644 src/display.c
 create mode 100644 src/display.h

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 17d445b..0f2de42 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -42,7 +42,8 @@ include_directories(
 	SYSTEM ${ALLEG5_INCLUDE_DIRS})
 
 set(SRCS
-	src/main.c)
+	src/main.c
+	src/display.c)
 
 add_definitions(-DVERSION="${TARGET_VERSION}")
 
diff --git a/src/display.c b/src/display.c
new file mode 100644
index 0000000..a2aada9
--- /dev/null
+++ b/src/display.c
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2018  Ortega Froysa, Nicolás <nortega@themusicinnoise.net>
+ * Author: Ortega Froysa, Nicolás <nortega@themusicinnoise.net>
+ *
+ * This program 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "display.h"
+
+#include <stdio.h>
+#include <allegro5/allegro.h>
+
+static ALLEGRO_DISPLAY *display;
+
+int create_display(unsigned int width, unsigned int height) {
+	display = al_create_display(width, height);
+	if(!display)
+		return 0;
+	return 1;
+}
+
+void destroy_display() {
+	al_destroy_display(display);
+}
diff --git a/src/display.h b/src/display.h
new file mode 100644
index 0000000..e1db860
--- /dev/null
+++ b/src/display.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2018  Ortega Froysa, Nicolás <nortega@themusicinnoise.net>
+ * Author: Ortega Froysa, Nicolás <nortega@themusicinnoise.net>
+ *
+ * This program 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+/**
+ * @brief Create an allegro 5 display with a given width and height.
+ *
+ * @param width The width of the display.
+ * @param height The height of the display.
+ *
+ * @return If successful it will return 1, else it will return 0.
+ */
+int create_display(unsigned int width, unsigned int height);
+
+/**
+ * @brief Destroy the display (used for shutdown).
+ */
+void destroy_display();
diff --git a/src/globals.h b/src/globals.h
index e45c75f..55ade6b 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -21,3 +21,9 @@
 #ifndef VERSION
 #	define VERSION "[version]"
 #endif
+
+#ifndef FPS
+#	define FPS 60
+#endif
+
+extern int run; ///< Whether or not to continue running the simulation.
diff --git a/src/main.c b/src/main.c
index 624d078..d5252c5 100644
--- a/src/main.c
+++ b/src/main.c
@@ -16,11 +16,41 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <stdio.h>
-
 #include "globals.h"
+#include "display.h"
+
+int run;
+
+#include <stdio.h>
+#include<allegro5/allegro.h>
 
 int main() {
 	printf("SpaceShipSim v%s\n", VERSION);
+
+	if(!al_init())
+	{
+		fprintf(stderr, "alleg5: failed to initialize Allegro.\n");
+		return 1;
+	}
+	if(!create_display(800, 600))
+	{
+		fprintf(stderr, "alleg5: failed to create display.\n");
+		return 1;
+	}
+
+	// begin running the simulation
+	run = 1;
+
+	while(run)
+	{
+		// TODO: handle events
+		// TODO: run simulation physics
+		al_clear_to_color(al_map_rgb(0, 0, 0));
+		// TODO: run simulation draw functions
+		al_flip_display();
+	}
+
+	destroy_display();
+
 	return 0;
 }