Added ability to open, close and render fonts

src/GameEngine.c

@@ -9,7 +9,9 @@
 #include "SDL_mixer.h"
 #include "SDL_pixels.h"
 #include "SDL_render.h"
+#include "SDL_surface.h"
 #include "SDL_timer.h"
+#include "SDL_ttf.h"
 #include "Window.h"
 #include "constants.h"
 #include "engine_build_config.h"
@@ -33,9 +35,9 @@ INTERNAL struct game_engine {
   AssetManager *asset_manager;
 } GameEngine;
 
-bool init_game(const char *game_name, uint32_t window_width,
-               uint32_t window_height, SDL_Color window_background_color,
-               bool full_screen, uint8_t audio_tracks) {
+bool init_engine(const char *game_name, uint32_t window_width,
+                 uint32_t window_height, SDL_Color window_background_color,
+                 bool full_screen, uint8_t audio_tracks) {
   bool initialisation_complete = true;
 
   if (SDL_Init(SDL_INIT_EVERYTHING) != 0) {
@@ -54,6 +56,13 @@ bool init_game(const char *game_name, uint32_t window_width,
     initialisation_complete = false;
   }
 
+  if (TTF_Init() < 0) {
+#ifdef DEBUG_ENGINE
+    printf("Failed to initialise SDL_ttf. Error: %s\n", TTF_GetError());
+#endif /* DEBUG_ENGINE */
+    initialisation_complete = false;
+  }
+
   // We're only interested in initialising SDL_mixer with WAVE files, so no
   // need to pass any flags
   if (Mix_Init(0) != 0) {
@@ -99,7 +108,7 @@ bool init_game(const char *game_name, uint32_t window_width,
   }
 
   if (!initialisation_complete) {
-    close_game();
+    close_engine();
 
     return false;
   }
@@ -157,6 +166,44 @@ void render_texture_asset(AssetID id, float x, float y, float w, float h) {
   render_texture(GameEngine.window.renderer, texture, x, y, w, h);
 }
 
+void render_text_with_font_asset(AssetID id, const char *text, float x,
+                                 float y) {
+  if (id < 0) {
+    return;
+  }
+
+  TTF_Font *font = get_font(GameEngine.asset_manager, id);
+  if (!font) {
+    return;
+  }
+
+  SDL_Surface *surface =
+      TTF_RenderText_Solid(font, text, (SDL_Color){0, 0, 0, 255});
+
+  // Get the width and height, in pixels, of the text rendered using the font
+  int32_t w = 0;
+  int32_t h = 0;
+  TTF_SizeText(font, text, &w, &h);
+
+  render_surface(GameEngine.window.renderer, surface, x, y, w, h);
+
+  SDL_FreeSurface(surface);
+  surface = NULL;
+}
+
+void set_font_asset_size(AssetID id, uint32_t size) {
+  if (id < 0) {
+    return;
+  }
+
+  TTF_Font *font = get_font(GameEngine.asset_manager, id);
+  if (!font) {
+    return;
+  }
+
+  TTF_SetFontSize(font, size);
+}
+
 int8_t play_audio_asset(AssetID id, int16_t loops, bool fade_in,
                         uint32_t fade_length_in_ms) {
   if (id < 0) {
@@ -530,7 +577,7 @@ void render() {
   swap_render_buffers(&(GameEngine.window));
 }
 
-void close_game() {
+void close_engine() {
   destroy_asset_manager(&(GameEngine.asset_manager));
 
   destroy_object_store(&(GameEngine.object_store));
@@ -547,6 +594,8 @@ void close_game() {
 
   Mix_Quit();
 
+  TTF_Quit();
+
   IMG_Quit();
 
   SDL_Quit();