From dbb26902ed54ce308fdcec4697616e152f2894fd Mon Sep 17 00:00:00 2001
From: Clyne Sullivan <clyne@bitgloo.com>
Date: Mon, 16 Sep 2019 12:46:44 -0400
Subject: success with font loading

---
 Assets/FreePixel.ttf | Bin 0 -> 64880 bytes
 Makefile             |   1 +
 Scripts/init.lua     |   2 ++
 src/engine.cpp       |  11 ++++++++++-
 src/script.cpp       |  13 +++++--------
 src/script.hpp       |   6 ++++++
 src/text.cpp         |  23 +++++++----------------
 src/text.hpp         |  13 ++++++++++++-
 8 files changed, 43 insertions(+), 26 deletions(-)
 create mode 100644 Assets/FreePixel.ttf

diff --git a/Assets/FreePixel.ttf b/Assets/FreePixel.ttf
new file mode 100644
index 0000000..d22b2a2
Binary files /dev/null and b/Assets/FreePixel.ttf differ
diff --git a/Makefile b/Makefile
index e586110..dcbac2b 100644
--- a/Makefile
+++ b/Makefile
@@ -83,3 +83,4 @@ $(OUTDIR)/%.$(OBJEXT): $(SRCDIR)/%.$(SRCEXT)
 	@rm -f $(OUTDIR)/$*.$(DEPEXT).tmp
 
 .PHONY: all remake clean cleaner resources
+
diff --git a/Scripts/init.lua b/Scripts/init.lua
index f177462..2eeee18 100644
--- a/Scripts/init.lua
+++ b/Scripts/init.lua
@@ -1,3 +1,5 @@
+game.loadFont("freepixel16", "Assets/FreePixel.ttf", 16)
+
 bird = {
     Player = 0,
     EventListeners = {
diff --git a/src/engine.cpp b/src/engine.cpp
index 66739ff..37f6e68 100644
--- a/src/engine.cpp
+++ b/src/engine.cpp
@@ -27,6 +27,7 @@
 #include "script.hpp"
 #include "render.hpp"
 #include "physics.hpp"
+#include "text.hpp"
 
 #include "components/EventListener.hpp"
 #include "components/Script.hpp"
@@ -47,10 +48,18 @@ int Engine::init(void)
     systems.add<RenderSystem>();
     systems.add<ScriptSystem>(entities);
     systems.add<PhysicsSystem>();
+    systems.add<TextSystem>();
     systems.configure();
 
     // Load game script and entity data
-    systems.system<ScriptSystem>()->init();
+    auto* script = systems.system<ScriptSystem>().get();
+    script->addToGameNamespace("loadFont",
+    [this](std::string name, std::string file, int size) {
+        systems.system<TextSystem>().get()->loadFont(name, file, size);
+    });
+    script->init();
+    
+
     if (GameState::load("save.json", entities)) {
         std::cout << "Loaded from save.json. Delete the file if you don't want "
                      "it." << std::endl;
diff --git a/src/script.cpp b/src/script.cpp
index a6f0968..61aa136 100644
--- a/src/script.cpp
+++ b/src/script.cpp
@@ -31,6 +31,9 @@ void ScriptSystem::configure([[maybe_unused]] entityx::EntityManager& entities,
 
     // Init after systems.configure() in engine.cpp
     //init();
+    lua.open_libraries(sol::lib::base, sol::lib::math, sol::lib::string);
+
+    scriptExport();
 }
 
 #include <components/Script.hpp>
@@ -54,9 +57,6 @@ void ScriptSystem::receive([[maybe_unused]] const EntitySpawnEvent &toSpawn)
 
 int ScriptSystem::init(void)
 {
-    lua.open_libraries(sol::lib::base, sol::lib::math, sol::lib::string);
-
-    scriptExport();
     doFile();
 
     return 0;
@@ -87,9 +87,6 @@ void ScriptSystem::doFile(void)
 
 void ScriptSystem::scriptExport(void)
 {
-    std::function<sol::table(sol::table)> func = 
-        [this](sol::table t){ return spawn(t);};
-
     lua.new_usertype<Position>("Position",
             sol::constructors<Position(double x, double y), Position()>(),
             "x", &Position::x,
@@ -124,8 +121,8 @@ void ScriptSystem::scriptExport(void)
             sol::constructors<Physics(void), Physics()>(),
             "standing", &Physics::standing);
 
-    auto gamespace = lua["game"].get_or_create<sol::table>();
-    gamespace.set_function("spawn", func);
+    game = lua["game"].get_or_create<sol::table>();
+    game.set_function("spawn", [this](sol::table t) { return spawn(t); });
 }
 
 sol::table ScriptSystem::spawn(sol::object param)
diff --git a/src/script.hpp b/src/script.hpp
index d4e2234..f86c8cd 100644
--- a/src/script.hpp
+++ b/src/script.hpp
@@ -45,6 +45,7 @@ private:
      * interactions between C and Lua
      */
     sol::state lua;
+    sol::table game;
 
     entityx::EntityManager& manager;
 
@@ -96,6 +97,11 @@ public:
      * Contains all calls that export components/functions to lua.
      */
     void scriptExport(void);
+
+    template<typename F>
+    void addToGameNamespace(const std::string& name, F func) {
+        game.set_function(name, func);
+    }
 };
 
 #endif // SYSTEM_SCRIPT_HPP_
diff --git a/src/text.cpp b/src/text.cpp
index 7b2eb02..85c0ceb 100644
--- a/src/text.cpp
+++ b/src/text.cpp
@@ -1,18 +1,6 @@
 #include "text.hpp"
 
-#include <SDL2/SDL_opengl.h>
-
-#include <tuple>
-
-struct FT_Info {
-    std::pair<float, float> wh;
-    std::pair<float, float> bl;
-    std::pair<float, float> ad;
-	GLuint tex;
-
-	FT_Info(void)
-		: tex(0) {}
-};
+#include <iostream>
 
 //FT_Library freetype;
 //std::map<std::string, FT_Face> fonts;
@@ -41,15 +29,15 @@ void TextSystem::loadFont(const std::string& name,
                           int size)
 {
 
-    if (fonts.find(name) == fonts.end()) {
+    if (fonts.find(file) == fonts.end()) {
         FT_Face face;
         if (FT_New_Face(freetype, file.c_str(), 0, &face)) {
             // TODO handle this error
         }
-        fonts.emplace(name, face);
+        fonts.emplace(file, face);
     }
 
-    auto& face = fonts[name];
+    auto& face = fonts[file];
     FT_Set_Pixel_Sizes(face, 0, size);
     fontData.try_emplace(name, 95);
 
@@ -77,5 +65,8 @@ void TextSystem::loadFont(const std::string& name,
         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, g->bitmap.width, g->bitmap.rows,
             0, GL_RGBA, GL_UNSIGNED_BYTE, buf.data());
     }
+
+    std::cout << "Loaded font: " << file << " (size: " << size << ')'
+              << std::endl;
 }
 
diff --git a/src/text.hpp b/src/text.hpp
index 08248b3..d7fb790 100644
--- a/src/text.hpp
+++ b/src/text.hpp
@@ -24,12 +24,23 @@
 #include <entityx/entityx.h>
 #include <ft2build.h>
 #include <freetype/freetype.h>
+#include <SDL2/SDL_opengl.h>
+
 
 #include <map>
 #include <string>
+#include <tuple>
 #include <vector>
 
-struct FT_Info;
+struct FT_Info {
+    std::pair<float, float> wh;
+    std::pair<float, float> bl;
+    std::pair<float, float> ad;
+	GLuint tex;
+
+	FT_Info(void)
+		: tex(0) {}
+};
 
 /**
  * @class PhysicsSystem
-- 
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