4 files changed, 51 insertions, 2 deletions
diff --git a/die.c b/die.c
new file mode 100644
index 0000000..0635b31
--- /dev/null
+++ b/die.c
@@ -0,0 +1,16 @@
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdlib.h>
+
+#include "die.h"
+
+void die(const char* fmt, ...) {
+	va_list args;
+	va_start(args, fmt);
+	vfprintf(stderr, fmt, args);
+	fflush(stderr);
+	va_end(args);
+
+	exit(EXIT_FAILURE);
+}
+
diff --git a/die.h b/die.h
new file mode 100644
index 0000000..a3f391d
--- /dev/null
+++ b/die.h
@@ -0,0 +1,5 @@
+#pragma once
+
+/** @brief print error and exit */
+void die(const char*, ...);
+
diff --git a/main.c b/main.c
index be899de..3beddeb 100644
--- a/main.c
+++ b/main.c
@@ -1,5 +1,12 @@
+#include <stdlib.h>
 #include <GLFW/glfw3.h>
 
+#include "die.h"
+
+void resize_handler(GLFWwindow* window, int width, int height) {
+	glViewport(0, 0, width, height);
+}
+
 int main(int argc, char** argv) {
 	glfwInit();
 
@@ -8,6 +15,26 @@ int main(int argc, char** argv) {
 
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
-	return 0;
+	int width = 800, height = 600;
+	GLFWwindow* window = glfwCreateWindow(width, height, "vis", NULL, NULL);
+
+	if (window == NULL) {
+		glfwTerminate();
+		die("error: could not create window\n");
+	}
+
+	glfwMakeContextCurrent(window);
+	glfwSetFramebufferSizeCallback(window, resize_handler);
+	resize_handler(window, width, height);
+
+	while (!glfwWindowShouldClose(window)) {
+		glClearColor(1.f, 0.f, 1.f, 1.0f);
+		glClear(GL_COLOR_BUFFER_BIT);
+
+		glfwSwapBuffers(window);
+	}
+
+	glfwTerminate();
+	return EXIT_SUCCESS;
 }
 
diff --git a/makefile b/makefile
index 4525ae0..684dab0 100644
--- a/makefile
+++ b/makefile
@@ -1,11 +1,12 @@
 LDFLAGS += -lglfw
+LDFLAGS += -lOpenGL
 
 .PHONY: FORCE
 
 all: main FORCE
 
 main: main.o
-
+main: die.o
 
 clean: FORCE
 	git clean -fxdi