Extract some configuration into EngineConfig

src/engine/engine.c

@@ -21,7 +21,7 @@ static void onGlfwError(int error, const char* description);
 
 
 
-void init() {
+void init(EngineConfig config) {
 	if (window) {
 		logError("init called more than once");
 		return;
@@ -41,7 +41,12 @@ void init() {
 	// glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
 	// glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 5);
 
-	window = glfwCreateWindow(1280, 720, "shadowclad", NULL, NULL);
+	window = glfwCreateWindow(config.windowWidth,
+	                          config.windowHeight,
+	                          config.windowTitle.cstr,
+	                          NULL,
+	                          NULL);
+
 	if (!window) {
 		logError("Window or context creation failed");
 		glfwTerminate();
@@ -60,8 +65,8 @@ void init() {
 		exit(EXIT_LIB_FAIL);
 	}
 
-	logInfo("Setting swap interval to 1");
-	glfwSwapInterval(1);
+	logInfo("Setting swap interval to %d", config.swapInterval);
+	glfwSwapInterval(config.swapInterval);
 
 	int width, height;
 	glfwGetFramebufferSize(window, &width, &height);
@@ -99,6 +104,13 @@ void terminate() {
 	glfwTerminate();
 }
 
+EngineConfig defaultConfig() {
+	return (EngineConfig) { .windowWidth = 800,
+	                        .windowHeight = 600,
+	                        .windowTitle = newString(NULL),
+	                        .swapInterval = 1 };
+}
+
 static void onGlfwError(int error, const char* description) {
 	logError("GLFW error: %s", description);
 }

src/engine/engine.h

@@ -1,8 +1,21 @@
 #ifndef ENGINE_ENGINE_H_
 #define ENGINE_ENGINE_H_
 
-void init();
+#include "string.h"
+
+typedef struct EngineConfig EngineConfig;
+
+struct EngineConfig {
+	int windowWidth;
+	int windowHeight;
+	String windowTitle;
+	int swapInterval;
+};
+
+void init(EngineConfig);
 void run(void (*updateFn) (float));
 void terminate();
 
+EngineConfig defaultConfig();
+
 #endif // ENGINE_ENGINE_H_

src/engine/string.c

@@ -2,6 +2,22 @@
 
 #include <stdlib.h>
 
+String newString(const char* s) {
+	size_t len = 0u;
+	char* cstr;
+	if (s) {
+		len = strlen(s);
+		cstr = memcpy(malloc((len + 1) * sizeof(char)),
+		              s,
+		              len * sizeof(char));
+	}
+	else {
+		cstr = malloc(1 * sizeof(char));
+	}
+	cstr[len] = '\0';
+	return (String) { .length = len, .cstr = cstr };
+}
+
 String stringFromAiString(const struct aiString aistr) {
 	char* cstr = memcpy(malloc((aistr.length + 1) * sizeof(char)),
 		                aistr.data,

src/engine/string.h

@@ -10,6 +10,7 @@ struct String {
 	char* cstr;
 };
 
+String newString(const char* s);
 String stringFromAiString(const struct aiString aistr);
 void dropString(String str);
 

src/main.c

@@ -3,8 +3,13 @@
 #include "game/game.h"
 
 int main(/*int argc, char** argv*/) {
+	EngineConfig cfg = { .windowWidth = 1280,
+	                     .windowHeight = 720,
+	                     .windowTitle = newString("shadowclad"),
+	                     .swapInterval = 1 };
+
 	// Engine startup
-	init();
+	init(cfg);
 
 	initGame();