From 71ab55ad22abd7ba8d6c41fa4c9ff5aa69db8284 Mon Sep 17 00:00:00 2001
From: Bad Diode <bd@badd10de.dev>
Date: Tue, 26 Jan 2021 08:45:23 +0100
Subject: Initialize OpenGL window

---
 Makefile  |  2 +-
 src/app.c | 47 ++++++++++++++++++++++++++++++++++++++++++-----
 src/app.h | 11 +++++------
 3 files changed, 48 insertions(+), 12 deletions(-)

diff --git a/Makefile b/Makefile
index b31e5c8..e7770ac 100644
--- a/Makefile
+++ b/Makefile
@@ -19,7 +19,7 @@ LIB_DIR        := $(BUILD_DIR)
 # Compiler and linker configuration.
 CC             := gcc
 CFLAGS         := -Wall -Wextra -pedantic -std=c99
-LDFLAGS        :=
+LDFLAGS        := -lGL -lGLEW -lglfw
 LDLIBS         :=
 RELEASE_CFLAGS := -DNDEBUG -O2
 DEBUG_CFLAGS   := -DDEBUG -g
diff --git a/src/app.c b/src/app.c
index a39bff0..99f5cff 100644
--- a/src/app.c
+++ b/src/app.c
@@ -4,8 +4,37 @@
 static inline bool
 app_init(AppState *state, PlatformAPI platform) {
     platform.log("INIT");
-    state->lt_memory = platform.calloc(LT_MEMORY_SIZE, sizeof(u8));
-    state->st_memory = platform.calloc(ST_MEMORY_SIZE, sizeof(u8));
+
+    // Initialize GLFW.
+    if (!glfwInit()) {
+        platform.log("ERROR: failed to initialize GLFW");
+        return false;
+    }
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+
+    // // Initialize window.
+    GLFWwindow* window = glfwCreateWindow(400, 300, "Hello MIC", NULL, NULL);
+    if (window == NULL) {
+        platform.log("ERROR: failed to create GLFW window");
+        glfwTerminate();
+        return false;
+    }
+    glfwMakeContextCurrent(window);
+
+    // Initialize GLEW.
+    if(glewInit() != GLEW_OK) {
+        platform.log("ERROR: glew initialization");
+        glfwTerminate();
+        return false;
+    }
+
+    // Initialize viewport.
+    glViewport(0, 0, 400, 300);
+
+    // Initialize application state.
+    state->window = window;
     return true;
 }
 
@@ -29,9 +58,17 @@ app_unload(AppState *state, PlatformAPI platform) {
 
 static inline bool
 app_step(AppState *state, PlatformAPI platform) {
-    (void)state; // Unused parameter.
-    platform.log("STEP");
-    platform.sleep(100000);
+    (void)platform; // Unused parameter.
+    if (glfwWindowShouldClose(state->window)) {
+        return false;
+    }
+
+    glClearColor(1.0f, 0.0f, 0.4f, 1.0f);
+    glClear(GL_COLOR_BUFFER_BIT);
+
+    glfwSwapBuffers(state->window);
+    glfwPollEvents();
+
     return true;
 }
 
diff --git a/src/app.h b/src/app.h
index 8edbe58..613360f 100644
--- a/src/app.h
+++ b/src/app.h
@@ -1,16 +1,15 @@
 #ifndef MIC_APP_H
 #define MIC_APP_H
 
+#include <GL/glew.h>
+#include <GLFW/glfw3.h>
+
 #include "shorthand.h"
 #include "platform.h"
 
-#define LT_MEMORY_SIZE GB(2)
-#define ST_MEMORY_SIZE MB(100)
-
 typedef struct AppState {
-    // Long and short term memory.
-    char *lt_memory;
-    char *st_memory;
+    // OpenGL
+    GLFWwindow *window;
 } AppState;
 
 // Function pointers for the AppAPI.
-- 
cgit v1.2.1