Added functionality to print grid to screen

src/main.c

@@ -22,6 +22,13 @@ bool initialize_window(void) {
 	
     }
 
+    // Use SDL to query what is the fullscreen max. width and height
+    SDL_DisplayMode display_mode;
+    SDL_GetCurrentDisplayMode(0, &display_mode);
+
+    window_width = display_mode.w;
+    window_height = display_mode.h;
+
     // Create a SDL window 
     window = SDL_CreateWindow(
 	NULL,
@@ -42,10 +49,18 @@ bool initialize_window(void) {
 	fprintf(stderr, "Error creating SDL error.\n");
 	return false;
     }    
+    SDL_SetWindowFullscreen(window, SDL_WINDOW_FULLSCREEN);
+    
 
     return true;
 }
 
+   
+  
+    
+//    SDL_RenderDrawLine(&render_grid, 100, 100, 300, 300);
+
+
 void setup(void){
     // Allocates the memory in bytes required to hold for color_buffer, using sizeof to allocate the # of bytes required
     color_buffer = (uint32_t*) malloc(sizeof(uint32_t) * window_width * window_height);
@@ -96,13 +111,23 @@ void clear_color_buffer(uint32_t color){
     }
 }
 
+void draw_grid(void){
+    for (int y = 0; y < window_height; y += 10){
+	for (int x = 0; x < window_width; x += 10){
+	//	if (x % 10 == 0 || y % 10 == 0){
+		    color_buffer[(window_width * y) + x] = 0xFF333333;
+	    }
+	}
+    }
+ // }
+
 void render(void){
     SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);
     SDL_RenderClear(renderer);
    
+    draw_grid();
     render_color_buffer();
-
-    clear_color_buffer(0xFFFFFF00);
+    clear_color_buffer(0xFF000000);
 
     SDL_RenderPresent(renderer);
 }