synchronise with the template

- use the version of audio management which doesn't crash the
application if something goes wrong
- include colour32
- update error management to be more reflective of the one defined in
the template
- modify the renderer functions to be more reflective of the template
- modify the game functions to be more reflective of the template (& use
a more failproof method of initializing)
- add gametime
- remove set_gamestatus logic and just use a run boolean in gamedata
- remove emscripten preprocessors as those haven't really been used

src/window/renderer.h

@@ -1,9 +1,8 @@
 #pragma once
+
 #include <SDL_render.h>
-#include <SDL_surface.h>
 #include <SDL_ttf.h>
 #include <SDL_video.h>
-#include <stdint.h>
 
 #include "../game/game.h"
 
@@ -16,20 +15,22 @@
 #define BLOCK_WIDTH   (TET_WIDTH / COLUMNS)                  // width of a block
 #define BLOCK_HEIGHT  (TET_HEIGHT / ROWS)                    // height of a block
 
+// contains the data that's cached between renders
 struct render_cache {
     SDL_Texture* score_texture;
     SDL_Surface* score_surface;
     uint16_t prevscore;
 };
 
+// contains the data necessary for rendering
 typedef struct {
-    game_data const* game_dat;
+    gamedata const* game_dat;
     SDL_Window* window;
     SDL_Renderer* renderer;
     TTF_Font* font;
     struct render_cache* cache;
-} render_data;
+} renderdata;
 
-void renderer_init(render_data* render_dat, game_data const* game_dat);
-void renderer_update(render_data const* dat);
-void renderer_free(render_data* dat);
+void render_init(renderdata*, gamedata const*); // initializes the renderer, outputs to render_data
+void render_update(renderdata const*);          // causes a draw to occur, will also determine update rate
+void render_free(renderdata*);                  // frees the memory allocated to the renderer in render_data