More seperate cc files, font & overlay rendering

font.cc

@@ -0,0 +1,41 @@
+#include <cassert>
+#include <SDL2/SDL_ttf.h>
+
+#include "common.hh"
+#include "texture.hh"
+#include "font.hh"
+
+Font::Font(std::string const& filename, unsigned ptsize)
+  : font_{nullptr}
+{
+  assert(TTF_WasInit());
+  font_ = TTF_OpenFont(filename.c_str(), ptsize);
+  if(!font_)
+    throw TTFException{};
+}
+
+Font::~Font()
+{
+  if(font_)
+    TTF_CloseFont(font_);
+}
+
+Texture2D Font::render(std::string const& text, bool fast) const {
+  SDL_Surface *surf;
+  if(fast)
+    surf = TTF_RenderUTF8_Solid(font_, text.c_str(), SDL_Color{255, 255, 255, 255});
+  else
+    surf = TTF_RenderUTF8_Blended(font_, text.c_str(), SDL_Color{255, 255, 255, 255});
+  
+  if(!surf)
+    throw TTFException{};
+  
+  try {
+    Texture2D ret{surf};
+    SDL_FreeSurface(surf);
+    return ret;
+  } catch(...) {
+    SDL_FreeSurface(surf);
+    throw;
+  }
+}