Add basic adapter

examples/main.cpp

@@ -1,4 +1,4 @@
-#include "../src/store.hpp"
+#include "../src/adapters/adapter.hpp"
 #include "../src/scene.hpp"
 #include "../src/camera.hpp"
 #include "../src/lights/sun.hpp"
@@ -15,6 +15,7 @@
 #include <emscripten/html5.h>
 
 static Store store;
+static const Adapter adapter(store);
 
 static void iterate();
 
@@ -78,12 +79,12 @@ int main()
 
   camera.projection = glm::perspective(45.0f, (float)640 / (float)480, 0.1f, 100.0f);
 
-  protagonist = store.load<Models::Static>("protagonist.obj");
-  car = store.load<Models::Static>("car.obj");
-  suzanne = store.load<Models::Static>("suzanne.obj");
-  teapot = store.load<Models::Static>("teapot.obj");
-  bunny = store.load<Models::Static>("bunny.obj");
-  untitled = store.load<Models::Raw>("untitled.raw");
+  protagonist = adapter.load<Models::Static>("protagonist.obj");
+  car = adapter.load<Models::Static>("car.obj");
+  suzanne = adapter.load<Models::Static>("suzanne.obj");
+  teapot = adapter.load<Models::Static>("teapot.obj");
+  bunny = adapter.load<Models::Static>("bunny.obj");
+  untitled = adapter.load<Models::Raw>("untitled.raw");
 
   protagonist1 = new Objects::WithModel(*protagonist);
   protagonist1->position.z = 4;

src/adapters/adapter.hpp

@@ -0,0 +1,36 @@
+#ifndef _ADAPTER_HPP_
+#define _ADAPTER_HPP_
+
+#include "../store.hpp"
+
+struct Adapter
+{
+  Adapter(Store &store): _store(store) {};
+
+  template <class T>
+  const T *load(const std::string &name) const;
+
+  template <class T>
+  const std::string filename(const std::string &name) const;
+
+private:
+  Store &_store;
+};
+
+template <class T>
+const T *Adapter::load(const std::string &name) const
+{
+  static_assert(std::is_convertible<T, Resource>::value
+                  && !std::is_same<T, Resource>::value,
+                "Adapter can deal with only Resource's children");
+
+  return _store.load<T>(*this, name);
+}
+
+template <class T>
+const std::string Adapter::filename(const std::string &name) const
+{
+  return "/data" + T::filename(name);
+}
+
+#endif // _ADAPTER_HPP_

src/models/raw.cpp

@@ -21,17 +21,17 @@ const GLchar *const Raw::uniforms[] = {
 
 const std::string Raw::filename(const std::string &name)
 {
-  return "/data/models/" + name;
+  return "/models/" + name;
 }
 
-Raw::Raw(__attribute__((unused)) Store &store, const std::string &name)
+Raw::Raw(const Adapter &adapter, const std::string &name)
 {
-  exe = store.load<Program>("normal")->build(
+  exe = adapter.load<Program>("normal")->build(
     __attrib_count, attribs,
     __uniform_count, uniforms
   );
 
-  FILE *file = fopen(filename(name).c_str(), "r");
+  FILE *file = fopen(adapter.filename<Raw>(name).c_str(), "r");
 
   while (!feof(file))
   {

src/models/static.cpp

@@ -27,17 +27,17 @@ const GLchar *const Static::uniforms[] = {
 
 const std::string Static::filename(const std::string &name)
 {
-  return "/data/models/" + name;
+  return "/models/" + name;
 }
 
-Static::Static(Store &store, const std::string &name)
+Static::Static(const Adapter &adapter, const std::string &name)
 {
-  exe = store.load<Program>("textured")->build(
+  exe = adapter.load<Program>("textured")->build(
     __attrib_count, attribs,
     __uniform_count, uniforms
   );
 
-  std::ifstream file(filename(name), std::ios::in);
+  std::ifstream file(adapter.filename<Static>(name), std::ios::in);
 
   const Mtllib *mtllib = nullptr;
 
@@ -104,7 +104,7 @@ Static::Static(Store &store, const std::string &name)
     else
     if (line.substr(0, 7) == "mtllib ")
     {
-      mtllib = (Mtllib*)store.load<Mtllib>(line.substr(7));
+      mtllib = adapter.load<Mtllib>(line.substr(7));
     }
     else
     if (line.substr(0, 7) == "usemtl ")

src/mtllib.cpp

@@ -5,12 +5,12 @@
 
 const std::string Mtllib::filename(const std::string &name)
 {
-  return "/data/materials/" + name;
+  return "/materials/" + name;
 }
 
-Mtllib::Mtllib(Store &store, const std::string &name)
+Mtllib::Mtllib(const Adapter &adapter, const std::string &name)
 {
-  std::ifstream file(filename(name), std::ios::in);
+  std::ifstream file(adapter.filename<Mtllib>(name), std::ios::in);
 
   Material *material = nullptr;
 
@@ -28,7 +28,7 @@ Mtllib::Mtllib(Store &store, const std::string &name)
     else
     if (line.substr(0, 7) == "map_Kd ")
     {
-      material->texture = store.load<Texture>(line.substr(7));
+      material->texture = adapter.load<Texture>(line.substr(7));
     }
   }
 }

src/program.cpp

@@ -6,12 +6,12 @@
 
 const std::string Program::filename(const std::string &name)
 {
-  return "/data/programs/" + name;
+  return "/programs/" + name;
 }
 
-Program::Program(Store &store, const std::string &name):
-  vertex_shader(store.load<Shader>(name + ".vert")),
-  fragment_shader(store.load<Shader>(name + ".frag"))
+Program::Program(const Adapter &adapter, const std::string &name):
+  vertex_shader(adapter.load<Shader>(name + ".vert")),
+  fragment_shader(adapter.load<Shader>(name + ".frag"))
 {}
 
 const Executable *Program::build(

src/resource.hpp

@@ -1,7 +1,7 @@
 #ifndef _RESOURCE_HPP_
 #define _RESOURCE_HPP_
 
-#include "store.hpp"
+#include "adapters/adapter.hpp"
 
 struct Resource
 {
@@ -14,7 +14,7 @@ private:
 
 #define RESOURCE(T) \
   friend struct ::Store; \
-  T(Store &store, const std::string &name); \
+  T(const Adapter &adapter, const std::string &name); \
   static const std::string filename(const std::string &name);
 
 #endif // _RESOURCE_HPP_

src/shader.cpp

@@ -5,14 +5,14 @@
 
 const std::string Shader::filename(const std::string &name)
 {
-  return "/data/shaders/" + name;
+  return "/shaders/" + name;
 }
 
-Shader::Shader(__attribute__((unused)) Store &store, const std::string &name)
+Shader::Shader(const Adapter &adapter, const std::string &name)
 {
   const GLuint type = name.substr(name.size() - 5) == ".vert" ? GL_VERTEX_SHADER : GL_FRAGMENT_SHADER;
 
-  FILE *file = fopen(filename(name).c_str(), "r");
+  FILE *file = fopen(adapter.filename<Shader>(name).c_str(), "r");
 
   fseek(file, 0, SEEK_END);
   const long size = ftell(file);

src/store.hpp

@@ -5,26 +5,27 @@
 #include <string>
 #include <map>
 
+struct Adapter;
 struct Resource;
 
 struct Store
 {
   template <class T>
-  const T *load(const std::string &name);
+  const T *load(const Adapter &adapter, const std::string &name);
 
 private:
   std::map<std::string, Resource*> _resources;
 };
 
 template <class T>
-const T *Store::load(const std::string &name)
+const T *Store::load(const Adapter &adapter, const std::string &name)
 {
   static_assert(std::is_convertible<T, Resource>::value
                   && !std::is_same<T, Resource>::value,
                 "Store can load only Resource's children");
 
   if (_resources.find(T::filename(name)) == _resources.end())
-    _resources[T::filename(name)] = new T(*this, name);
+    _resources[T::filename(name)] = new T(adapter, name);
 
   _resources[T::filename(name)]->_ref_count++;
   return (T*)_resources[T::filename(name)];

src/texture.cpp

@@ -6,12 +6,12 @@
 
 const std::string Texture::filename(const std::string &name)
 {
-  return "/data/textures/" + name;
+  return "/textures/" + name;
 }
 
-Texture::Texture(__attribute__((unused)) Store &store, const std::string &name)
+Texture::Texture(const Adapter &adapter, const std::string &name)
 {
-  SDL_Surface *surface = IMG_Load(filename(name).c_str());
+  SDL_Surface *surface = IMG_Load(adapter.filename<Texture>(name).c_str());
 
   glGenTextures(1, &_id);
   glBindTexture(GL_TEXTURE_2D, _id);