From 3fa9af58bc907048a8ccadc2bef7736ec554a09d Mon Sep 17 00:00:00 2001
From: Kelly Rauchenberger <fefferburbia@gmail.com>
Date: Tue, 5 Jun 2018 21:02:51 -0400
Subject: refactored so that the renderer is its own class

---
 src/game.h       | 104 +++++++++++
 src/main.cpp     | 522 ++-----------------------------------------------------
 src/renderer.cpp | 309 ++++++++++++++++++++++++++++++++
 src/renderer.h   | 132 ++++++++++++++
 4 files changed, 560 insertions(+), 507 deletions(-)
 create mode 100644 src/game.h
 create mode 100644 src/renderer.cpp
 create mode 100644 src/renderer.h

(limited to 'src')

diff --git a/src/game.h b/src/game.h
new file mode 100644
index 0000000..1142efb
--- /dev/null
+++ b/src/game.h
@@ -0,0 +1,104 @@
+#ifndef GAME_H_7D2B65AE
+#define GAME_H_7D2B65AE
+
+#include <tuple>
+#include <set>
+#include <random>
+#include <list>
+#include "map.h"
+
+const int GAME_WIDTH = 640*2;
+const int GAME_HEIGHT = 480*2;
+const int TILE_WIDTH = 8*2;
+const int TILE_HEIGHT = TILE_WIDTH;
+const int INIT_ZOOM = 10;
+const int ZOOM_X_FACTOR = 8;
+const int ZOOM_Y_FACTOR = 6;
+const int RADIUS = 8;
+
+enum class Tile {
+  Floor,
+  Wall,
+  Dust,
+  Lamp
+};
+
+enum class Source {
+  None,
+  Dust,
+  Lamp,
+  Player
+};
+
+enum class LoseState {
+  None,
+  PoppingLamps,
+  PoppingPlayer,
+  Outro
+};
+
+struct Input {
+  bool left = false;
+  bool right = false;
+  bool up = false;
+  bool down = false;
+};
+
+using coord = std::tuple<int, int>;
+
+struct Kickup {
+  int x;
+  int y;
+  size_t cur;
+  size_t radius;
+  size_t chain;
+  std::set<coord> done;
+  std::set<coord> front;
+};
+
+struct MapData {
+  Tile tile = Tile::Floor;
+  bool lit = false;
+  bool wasLit = false;
+  size_t dustLife = 0;
+  Source lightType = Source::None;
+  int lightRadius = 0;
+  std::set<coord> litTiles;
+};
+
+class Game {
+public:
+
+  Game(std::mt19937& rng) :
+    rng(rng),
+    map(
+      -INIT_ZOOM * ZOOM_X_FACTOR / 2,
+      -INIT_ZOOM * ZOOM_Y_FACTOR / 2,
+      INIT_ZOOM * ZOOM_X_FACTOR,
+      INIT_ZOOM * ZOOM_Y_FACTOR)
+  {
+  }
+
+  std::mt19937& rng;
+
+  Map<MapData> map;
+  std::list<Kickup> kickups;
+  int litSpots = 0;
+  bool dirtyLighting = true;
+  size_t numLamps = 0;
+  size_t numDust = 0;
+
+  int player_x = 0;
+  int player_y = 0;
+  bool renderPlayer = true;
+
+  int curZoom = INIT_ZOOM;
+  int maxZoom = INIT_ZOOM;
+
+  bool zooming = false;
+  //size_t oldZoom;
+  int zoomProgress = 0;
+
+};
+
+#endif /* end of include guard: GAME_H_7D2B65AE */
diff --git a/src/main.cpp b/src/main.cpp
index 03e7cda..8f20635 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,455 +1,9 @@
-#include <SDL.h>
-#include <SDL_image.h>
-#include <stdexcept>
-#include <memory>
 #include <vector>
-#include <list>
-#include <random>
 #include <fov.h>
 #include <iostream>
-#include <tuple>
-#include <set>
 #include "util.h"
-#include "map.h"
-
-class sdl_error : public std::logic_error {
-public:
-
-  sdl_error() : std::logic_error(SDL_GetError())
-  {
-  }
-};
-
-class img_error : public std::logic_error {
-public:
-
-  img_error() : std::logic_error(IMG_GetError())
-  {
-  }
-};
-
-class window_deleter {
-public:
-
-  void operator()(SDL_Window* ptr)
-  {
-    SDL_DestroyWindow(ptr);
-  }
-};
-
-using window_ptr = std::unique_ptr<SDL_Window, window_deleter>;
-
-class renderer_deleter {
-public:
-
-  void operator()(SDL_Renderer* ptr)
-  {
-    SDL_DestroyRenderer(ptr);
-  }
-};
-
-using renderer_ptr = std::unique_ptr<SDL_Renderer, renderer_deleter>;
-
-class surface_deleter {
-public:
-
-  void operator()(SDL_Surface* ptr)
-  {
-    SDL_FreeSurface(ptr);
-  }
-};
-
-using surface_ptr = std::unique_ptr<SDL_Surface, surface_deleter>;
-
-class texture_deleter {
-public:
-
-  void operator()(SDL_Texture* ptr)
-  {
-    SDL_DestroyTexture(ptr);
-  }
-};
-
-using texture_ptr = std::unique_ptr<SDL_Texture, texture_deleter>;
-
-enum class Tile {
-  Floor,
-  Wall,
-  Dust,
-  Lamp
-};
-
-enum class Source {
-  None,
-  Dust,
-  Lamp,
-  Player
-};
-
-enum class LoseState {
-  None,
-  PoppingLamps,
-  PoppingPlayer,
-  Outro
-};
-
-const int GAME_WIDTH = 640*2;
-const int GAME_HEIGHT = 480*2;
-const int TILE_WIDTH = 8*2;
-const int TILE_HEIGHT = TILE_WIDTH;
-const int INIT_ZOOM = 10;
-const int ZOOM_X_FACTOR = 8;
-const int ZOOM_Y_FACTOR = 6;
-const int RADIUS = 8;
-
-struct Input {
-  bool left = false;
-  bool right = false;
-  bool up = false;
-  bool down = false;
-};
-
-using coord = std::tuple<int, int>;
-
-struct Kickup {
-  int x;
-  int y;
-  size_t cur;
-  size_t radius;
-  size_t chain;
-  std::set<coord> done;
-  std::set<coord> front;
-};
-
-struct MapData {
-  Tile tile = Tile::Floor;
-  bool lit = false;
-  bool wasLit = false;
-  double visibility = 0.0;
-  size_t dustLife = 0;
-  Source lightType = Source::None;
-  int lightRadius = 0;
-  std::set<coord> litTiles;
-};
-
-class Game {
-public:
-
-  Game(std::mt19937& rng) :
-    rng(rng),
-    map(
-      -INIT_ZOOM * ZOOM_X_FACTOR / 2,
-      -INIT_ZOOM * ZOOM_Y_FACTOR / 2,
-      INIT_ZOOM * ZOOM_X_FACTOR,
-      INIT_ZOOM * ZOOM_Y_FACTOR)
-  {
-  }
-
-  std::mt19937& rng;
-
-  Map<MapData> map;
-  std::list<Kickup> kickups;
-  int litSpots = 0;
-  bool dirtyLighting = true;
-  size_t numLamps = 0;
-  size_t numDust = 0;
-
-  int player_x = 0;
-  int player_y = 0;
-  bool renderPlayer = true;
-
-  int curZoom = INIT_ZOOM;
-  int maxZoom = INIT_ZOOM;
-
-  bool zooming = false;
-  //size_t oldZoom;
-  int zoomProgress = 0;
-
-};
-
-void render(
-  SDL_Renderer* ren,
-  const Game& game,
-  bool drawDark = true)
-{
-  texture_ptr origFade;
-  {
-    surface_ptr pfs(IMG_Load("../res/lighting.png"));
-    if (!pfs)
-    {
-      throw img_error();
-    }
-
-    origFade = texture_ptr(SDL_CreateTextureFromSurface(ren, pfs.get()));
-  }
-
-  SDL_SetTextureBlendMode(origFade.get(), SDL_BLENDMODE_BLEND);
-
-  texture_ptr playerFade(
-    SDL_CreateTexture(
-      ren,
-      SDL_PIXELFORMAT_RGBA4444,
-      SDL_TEXTUREACCESS_TARGET,
-      144,
-      144));
-
-  if (!playerFade)
-  {
-    throw sdl_error();
-  }
-
-  SDL_SetRenderTarget(ren, playerFade.get());
-  SDL_SetRenderDrawBlendMode(ren, SDL_BLENDMODE_NONE);
-  SDL_SetRenderDrawColor(ren, 0, 0, 0, 0);
-  SDL_RenderClear(ren);
-  SDL_RenderCopy(ren, origFade.get(), nullptr, nullptr);
-
-  texture_ptr lampFade(
-    SDL_CreateTexture(
-      ren,
-      SDL_PIXELFORMAT_RGBA4444,
-      SDL_TEXTUREACCESS_TARGET,
-      144,
-      144));
-
-  if (!lampFade)
-  {
-    throw sdl_error();
-  }
-
-  SDL_SetRenderTarget(ren, lampFade.get());
-
-  SDL_SetRenderDrawBlendMode(ren, SDL_BLENDMODE_NONE);
-  SDL_SetRenderDrawColor(ren, 0, 0, 0, 0);
-  SDL_RenderClear(ren);
-  SDL_RenderCopy(ren, origFade.get(), nullptr, nullptr);
-
-  SDL_SetRenderDrawBlendMode(ren, SDL_BLENDMODE_MOD);
-  SDL_SetRenderDrawColor(ren, 255, 204, 58, 255);
-  SDL_RenderFillRect(ren, nullptr);
-
-  texture_ptr dustFade(
-    SDL_CreateTexture(
-      ren,
-      SDL_PIXELFORMAT_RGBA4444,
-      SDL_TEXTUREACCESS_TARGET,
-      144,
-      144));
-
-  if (!dustFade)
-  {
-    throw sdl_error();
-  }
-
-  SDL_SetRenderTarget(ren, dustFade.get());
-
-  SDL_SetRenderDrawBlendMode(ren, SDL_BLENDMODE_NONE);
-  SDL_SetRenderDrawColor(ren, 0, 0, 0, 0);
-  SDL_RenderClear(ren);
-  SDL_RenderCopy(ren, origFade.get(), nullptr, nullptr);
-
-  SDL_SetRenderDrawBlendMode(ren, SDL_BLENDMODE_MOD);
-  SDL_SetRenderDrawColor(ren, 255, 150, 255, 255);
-  SDL_RenderFillRect(ren, nullptr);
-
-  texture_ptr canvas(
-    SDL_CreateTexture(
-      ren,
-      SDL_PIXELFORMAT_RGBA8888,
-      SDL_TEXTUREACCESS_TARGET,
-      TILE_WIDTH * game.map.getWidth(),
-      TILE_HEIGHT * game.map.getHeight()));
-
-  if (!canvas)
-  {
-    throw sdl_error();
-  }
-
-  SDL_SetRenderTarget(ren, canvas.get());
-  SDL_SetRenderDrawBlendMode(ren, SDL_BLENDMODE_NONE);
-  SDL_SetRenderDrawColor(ren, rand() % 255, rand() % 255, rand() % 255, 255);
-  SDL_RenderClear(ren);
-
-  for (int y = game.map.getTop(); y < game.map.getBottom(); y++)
-  {
-    for (int x = game.map.getLeft(); x < game.map.getRight(); x++)
-    {
-      bool draw = true;
-
-      if ((game.player_x == x && game.player_y == y) && game.renderPlayer)
-      {
-        SDL_SetRenderDrawColor(ren, 255, 255, 0, 255);
-      } else if (!game.map.at(x,y).lit)
-      {
-        if (drawDark)
-        {
-          SDL_SetRenderDrawColor(ren, 40, 40, 40, 255);
-        } else {
-          draw = false;
-        }
-      } else {
-        int alpha = 255;
-
-        switch (game.map.at(x,y).tile)
-        {
-          case Tile::Floor:
-          {
-            SDL_SetRenderDrawColor(ren, 210, 210, 210, alpha);
-            break;
-          }
-
-          case Tile::Wall:
-          {
-            SDL_SetRenderDrawColor(ren, 100, 100, 100, alpha);
-            break;
-          }
-
-          case Tile::Dust:
-          {
-            SDL_SetRenderDrawColor(ren, 128, 40, 255, alpha);
-            break;
-          }
-
-          case Tile::Lamp:
-          {
-            SDL_SetRenderDrawColor(ren, 0, 255, 255, alpha);
-            break;
-          }
-        }
-      }
-
-      if (draw)
-      {
-        SDL_Rect rect {
-          game.map.getTrueX(x) * TILE_WIDTH,
-          game.map.getTrueY(y) * TILE_HEIGHT,
-          TILE_WIDTH,
-          TILE_HEIGHT};
-
-        //SDL_RenderFillRect(ren, &rect);
-
-        //int alpha = (1.0 - game.map.at(x,y).visibility) * 255;
-        //SDL_SetRenderDrawColor(ren, 40, 40, 40, 255);
-        SDL_RenderFillRect(ren, &rect);
-      }
-    }
-  }
-
-  texture_ptr mask(
-    SDL_CreateTexture(
-      ren,
-      SDL_PIXELFORMAT_RGBA8888,
-      SDL_TEXTUREACCESS_TARGET,
-      TILE_WIDTH * game.map.getWidth(),
-      TILE_HEIGHT * game.map.getHeight()));
-
-  if (!mask)
-  {
-    throw sdl_error();
-  }
-
-  SDL_SetRenderTarget(ren, mask.get());
-  SDL_SetRenderDrawColor(ren, 0, 0, 0, 0);
-  SDL_RenderClear(ren);
-
-  for (int y = game.map.getTop(); y < game.map.getBottom(); y++)
-  {
-    for (int x = game.map.getLeft(); x < game.map.getRight(); x++)
-    {
-      if (game.map.at(x,y).lightType != Source::None)
-      {
-        texture_ptr sourceMask(
-          SDL_CreateTexture(
-            ren,
-            SDL_PIXELFORMAT_RGBA8888,
-            SDL_TEXTUREACCESS_TARGET,
-            TILE_WIDTH * game.map.getWidth(),
-            TILE_HEIGHT * game.map.getHeight()));
-
-        if (!sourceMask)
-        {
-          throw sdl_error();
-        }
-
-        SDL_SetRenderTarget(ren, sourceMask.get());
-        SDL_SetRenderDrawBlendMode(ren, SDL_BLENDMODE_NONE);
-        SDL_SetRenderDrawColor(ren, 0, 0, 0, 0);
-        SDL_RenderClear(ren);
-
-        int fadeX = game.map.getTrueX(x) - game.map.at(x,y).lightRadius;
-        int fadeY = game.map.getTrueY(y) - game.map.at(x,y).lightRadius;
-        int fadeRight = game.map.getTrueX(x) + game.map.at(x,y).lightRadius;
-        int fadeBottom = game.map.getTrueY(y) + game.map.at(x,y).lightRadius;
-
-        SDL_Rect fadeRect {
-          fadeX * TILE_WIDTH,
-          fadeY * TILE_HEIGHT,
-          (game.map.at(x,y).lightRadius * 2 + 1) * TILE_WIDTH,
-          (game.map.at(x,y).lightRadius * 2 + 1) * TILE_HEIGHT};
-
-        if (game.map.at(x,y).lightType == Source::Lamp)
-        {
-          SDL_SetTextureBlendMode(lampFade.get(), SDL_BLENDMODE_NONE);
-          SDL_RenderCopy(ren, lampFade.get(), nullptr, &fadeRect);
-        } else if (game.map.at(x,y).lightType == Source::Player) {
-          SDL_SetTextureBlendMode(playerFade.get(), SDL_BLENDMODE_NONE);
-          SDL_RenderCopy(ren, playerFade.get(), nullptr, &fadeRect);
-        } else if (game.map.at(x,y).lightType == Source::Dust) {
-          SDL_SetTextureBlendMode(dustFade.get(), SDL_BLENDMODE_NONE);
-          SDL_RenderCopy(ren, dustFade.get(), nullptr, &fadeRect);
-        }
-
-        SDL_SetRenderDrawColor(ren, 0, 0, 0, 0);
-
-        for (int sy = fadeY; sy < fadeBottom; sy++)
-        {
-          for (int sx = fadeX; sx < fadeRight; sx++)
-          {
-            if (!game.map.at(x,y).litTiles.count({sx, sy}))
-            {
-              SDL_Rect rect {
-                game.map.getTrueX(sx) * TILE_WIDTH,
-                game.map.getTrueY(sy) * TILE_HEIGHT,
-                TILE_WIDTH,
-                TILE_HEIGHT};
-
-              SDL_RenderFillRect(ren, &rect);
-            }
-          }
-        }
-
-        SDL_SetRenderTarget(ren, mask.get());
-        SDL_SetTextureBlendMode(sourceMask.get(), SDL_BLENDMODE_ADD);
-        SDL_RenderCopy(ren, sourceMask.get(), nullptr, nullptr);
-      }
-    }
-  }
-
-  SDL_SetRenderTarget(ren, canvas.get());
-  SDL_SetTextureBlendMode(mask.get(), SDL_BLENDMODE_MOD);
-  SDL_RenderCopy(ren, mask.get(), nullptr, nullptr);
-
-  SDL_SetRenderTarget(ren, nullptr);
-
-  if (!game.zooming)
-  {
-    SDL_RenderCopy(ren, canvas.get(), nullptr, nullptr);
-  } else {
-    // TODO: zooming back in to the player
-    SDL_Rect zoomRect {
-      ((game.maxZoom - game.curZoom) * TILE_WIDTH + game.zoomProgress)
-        * ZOOM_X_FACTOR / 2,
-      ((game.maxZoom - game.curZoom) * TILE_HEIGHT + game.zoomProgress)
-        * ZOOM_Y_FACTOR / 2,
-      (game.curZoom * TILE_WIDTH - game.zoomProgress) * ZOOM_X_FACTOR,
-      (game.curZoom * TILE_HEIGHT - game.zoomProgress) * ZOOM_Y_FACTOR
-    };
-
-    SDL_RenderCopy(ren, canvas.get(), &zoomRect, nullptr);
-  }
-
-  SDL_RenderPresent(ren);
-}
+#include "game.h"
+#include "renderer.h"
 
 void incrementIfSet(Game& game, int& count, int x, int y, Tile val = Tile::Wall)
 {
@@ -543,7 +97,7 @@ void movePlayer(Game& game, int x, int y)
   }
 }
 
-void recalculateLighting(Game& game, fov_settings_type* fov)
+void recalculateLighting(Game& game)
 {
   game.litSpots = 0;
 
@@ -551,12 +105,14 @@ void recalculateLighting(Game& game, fov_settings_type* fov)
   {
     md.wasLit = md.lit;
     md.lit = false;
-    md.visibility = 0.0;
     md.litTiles.clear();
   }
 
+  fov_settings_type fov;
+  fov_settings_init(&fov);
+
   fov_settings_set_opacity_test_function(
-    fov,
+    &fov,
     [] (void* data, int x, int y) {
       Game& game = *static_cast<Game*>(data);
 
@@ -564,7 +120,7 @@ void recalculateLighting(Game& game, fov_settings_type* fov)
     });
 
   fov_settings_set_apply_lighting_function(
-    fov,
+    &fov,
     [] (void* data, int x, int y, int dx, int dy, void* source) {
       Game& game = *static_cast<Game*>(data);
 
@@ -580,21 +136,7 @@ void recalculateLighting(Game& game, fov_settings_type* fov)
 
         game.map.at(x,y).lit = true;
 
-        /*game.map.at(x,y).visibility = std::max(
-          game.map.at(x,y).visibility,
-          std::pow(
-            std::max(
-              0.0,
-              1.0 - std::sqrt(dx * dx + dy * dy) / lightRadius),
-            1.0/3.0));*/
-
         sourceData.litTiles.emplace(x,y);
-
-        //Source ls = *static_cast<Source*>(source);
-        //if (static_cast<size_t>(ls) > static_cast<size_t>(m.lightSource[x+VIEW_WIDTH*y]))
-        {
-          //m.lightSource[x+VIEW_WIDTH*y] = ls;
-        }
       }
     });
 
@@ -620,7 +162,6 @@ void recalculateLighting(Game& game, fov_settings_type* fov)
       }
 
       game.map.at(x,y).lightType = ls;
-      //game.map.at(x,y).litTiles.clear();
 
       if (ls != Source::None)
       {
@@ -628,7 +169,7 @@ void recalculateLighting(Game& game, fov_settings_type* fov)
         game.map.at(x,y).litTiles.emplace(x,y);
 
         fov_circle(
-          fov,
+          &fov,
           static_cast<void*>(&game),
           static_cast<void*>(&game.map.at(x,y)),
           x,
@@ -636,7 +177,6 @@ void recalculateLighting(Game& game, fov_settings_type* fov)
           lightRadius);
 
         game.map.at(x,y).lit = true;
-        game.map.at(x,y).visibility = 1.0;
       }
     }
   }
@@ -832,44 +372,12 @@ int main(int, char**)
   std::random_device randomEngine;
   std::mt19937 rng(randomEngine());
 
-  if (SDL_Init(SDL_INIT_VIDEO) != 0)
-  {
-  	throw sdl_error();
-  }
-
-  if (IMG_Init(IMG_INIT_PNG) != IMG_INIT_PNG)
-  {
-    throw img_error();
-  }
-
   try
   {
-    window_ptr win(
-      SDL_CreateWindow("Ether", 100, 100, GAME_WIDTH, GAME_HEIGHT, SDL_WINDOW_SHOWN));
-
-    if (!win)
-    {
-      throw sdl_error();
-    }
-
-    renderer_ptr ren(
-      SDL_CreateRenderer(
-        win.get(),
-        -1,
-        SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC));
-
-    if (!ren)
-    {
-      throw sdl_error();
-    }
-
-    SDL_SetRenderDrawBlendMode(ren.get(), SDL_BLENDMODE_BLEND);
+    Renderer renderer;
 
     Game game(rng);
 
-    std::unique_ptr<fov_settings_type> fov(new fov_settings_type());
-    fov_settings_init(fov.get());
-
     for (MapData& md : game.map.data())
     {
       if (std::bernoulli_distribution(0.5)(rng))
@@ -1091,7 +599,7 @@ int main(int, char**)
 
       if (game.dirtyLighting)
       {
-        recalculateLighting(game, fov.get());
+        recalculateLighting(game);
 
         for (int y = game.map.getTop(); y < game.map.getBottom(); y++)
         {
@@ -1140,15 +648,15 @@ int main(int, char**)
         zoomAcc -= zoomDt;
       }
 
-      render(ren.get(), game, true);
+      renderer.render(game, true);
     }
   } catch (const sdl_error& ex)
   {
     std::cout << "SDL error (" << ex.what() << ")" << std::endl;
+  } catch (const img_error& ex)
+  {
+    std::cout << "SDL_IMG error (" << ex.what() << ")" << std::endl;
   }
 
-  IMG_Quit();
-  SDL_Quit();
-
   return 0;
 }
diff --git a/src/renderer.cpp b/src/renderer.cpp
new file mode 100644
index 0000000..eddd11d
--- /dev/null
+++ b/src/renderer.cpp
@@ -0,0 +1,309 @@
+#include "renderer.h"
+#include "game.h"
+
+Renderer::Renderer()
+{
+  win_ = window_ptr(
+    SDL_CreateWindow(
+      "Ether",
+      100,
+      100,
+      GAME_WIDTH,
+      GAME_HEIGHT,
+      SDL_WINDOW_SHOWN));
+
+  if (!win_)
+  {
+    throw sdl_error();
+  }
+
+  ren_ = renderer_ptr(
+    SDL_CreateRenderer(
+      win_.get(),
+      -1,
+      SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC));
+
+  if (!ren_)
+  {
+    throw sdl_error();
+  }
+
+  texture_ptr origFade;
+  {
+    surface_ptr pfs(IMG_Load("../res/lighting.png"));
+    if (!pfs)
+    {
+      throw img_error();
+    }
+
+    origFade = texture_ptr(SDL_CreateTextureFromSurface(ren_.get(), pfs.get()));
+  }
+
+  SDL_SetTextureBlendMode(origFade.get(), SDL_BLENDMODE_BLEND);
+
+  playerFade_ = texture_ptr(
+    SDL_CreateTexture(
+      ren_.get(),
+      SDL_PIXELFORMAT_RGBA4444,
+      SDL_TEXTUREACCESS_TARGET,
+      144,
+      144));
+
+  if (!playerFade_)
+  {
+    throw sdl_error();
+  }
+
+  SDL_SetRenderTarget(ren_.get(), playerFade_.get());
+  SDL_SetRenderDrawBlendMode(ren_.get(), SDL_BLENDMODE_NONE);
+  SDL_SetRenderDrawColor(ren_.get(), 0, 0, 0, 0);
+  SDL_RenderClear(ren_.get());
+  SDL_RenderCopy(ren_.get(), origFade.get(), nullptr, nullptr);
+
+  lampFade_ = texture_ptr(
+    SDL_CreateTexture(
+      ren_.get(),
+      SDL_PIXELFORMAT_RGBA4444,
+      SDL_TEXTUREACCESS_TARGET,
+      144,
+      144));
+
+  if (!lampFade_)
+  {
+    throw sdl_error();
+  }
+
+  SDL_SetRenderTarget(ren_.get(), lampFade_.get());
+
+  SDL_SetRenderDrawBlendMode(ren_.get(), SDL_BLENDMODE_NONE);
+  SDL_SetRenderDrawColor(ren_.get(), 0, 0, 0, 0);
+  SDL_RenderClear(ren_.get());
+  SDL_RenderCopy(ren_.get(), origFade.get(), nullptr, nullptr);
+
+  SDL_SetRenderDrawBlendMode(ren_.get(), SDL_BLENDMODE_MOD);
+  SDL_SetRenderDrawColor(ren_.get(), 255, 204, 58, 255);
+  SDL_RenderFillRect(ren_.get(), nullptr);
+
+  dustFade_ = texture_ptr(
+    SDL_CreateTexture(
+      ren_.get(),
+      SDL_PIXELFORMAT_RGBA4444,
+      SDL_TEXTUREACCESS_TARGET,
+      144,
+      144));
+
+  if (!dustFade_)
+  {
+    throw sdl_error();
+  }
+
+  SDL_SetRenderTarget(ren_.get(), dustFade_.get());
+
+  SDL_SetRenderDrawBlendMode(ren_.get(), SDL_BLENDMODE_NONE);
+  SDL_SetRenderDrawColor(ren_.get(), 0, 0, 0, 0);
+  SDL_RenderClear(ren_.get());
+  SDL_RenderCopy(ren_.get(), origFade.get(), nullptr, nullptr);
+
+  SDL_SetRenderDrawBlendMode(ren_.get(), SDL_BLENDMODE_MOD);
+  SDL_SetRenderDrawColor(ren_.get(), 255, 150, 255, 255);
+  SDL_RenderFillRect(ren_.get(), nullptr);
+}
+
+void Renderer::render(
+  const Game& game,
+  bool drawDark)
+{
+  texture_ptr canvas(
+    SDL_CreateTexture(
+      ren_.get(),
+      SDL_PIXELFORMAT_RGBA8888,
+      SDL_TEXTUREACCESS_TARGET,
+      TILE_WIDTH * game.map.getWidth(),
+      TILE_HEIGHT * game.map.getHeight()));
+
+  if (!canvas)
+  {
+    throw sdl_error();
+  }
+
+  SDL_SetRenderTarget(ren_.get(), canvas.get());
+  SDL_SetRenderDrawBlendMode(ren_.get(), SDL_BLENDMODE_NONE);
+  SDL_SetRenderDrawColor(ren_.get(), rand() % 255, rand() % 255, rand() % 255, 255);
+  SDL_RenderClear(ren_.get());
+
+  for (int y = game.map.getTop(); y < game.map.getBottom(); y++)
+  {
+    for (int x = game.map.getLeft(); x < game.map.getRight(); x++)
+    {
+      bool draw = true;
+
+      if ((game.player_x == x && game.player_y == y) && game.renderPlayer)
+      {
+        SDL_SetRenderDrawColor(ren_.get(), 255, 255, 0, 255);
+      } else if (!game.map.at(x,y).lit)
+      {
+        if (drawDark)
+        {
+          SDL_SetRenderDrawColor(ren_.get(), 40, 40, 40, 255);
+        } else {
+          draw = false;
+        }
+      } else {
+        int alpha = 255;
+
+        switch (game.map.at(x,y).tile)
+        {
+          case Tile::Floor:
+          {
+            SDL_SetRenderDrawColor(ren_.get(), 210, 210, 210, alpha);
+            break;
+          }
+
+          case Tile::Wall:
+          {
+            SDL_SetRenderDrawColor(ren_.get(), 100, 100, 100, alpha);
+            break;
+          }
+
+          case Tile::Dust:
+          {
+            SDL_SetRenderDrawColor(ren_.get(), 128, 40, 255, alpha);
+            break;
+          }
+
+          case Tile::Lamp:
+          {
+            SDL_SetRenderDrawColor(ren_.get(), 0, 255, 255, alpha);
+            break;
+          }
+        }
+      }
+
+      if (draw)
+      {
+        SDL_Rect rect {
+          game.map.getTrueX(x) * TILE_WIDTH,
+          game.map.getTrueY(y) * TILE_HEIGHT,
+          TILE_WIDTH,
+          TILE_HEIGHT};
+
+        SDL_RenderFillRect(ren_.get(), &rect);
+      }
+    }
+  }
+
+  texture_ptr mask(
+    SDL_CreateTexture(
+      ren_.get(),
+      SDL_PIXELFORMAT_RGBA8888,
+      SDL_TEXTUREACCESS_TARGET,
+      TILE_WIDTH * game.map.getWidth(),
+      TILE_HEIGHT * game.map.getHeight()));
+
+  if (!mask)
+  {
+    throw sdl_error();
+  }
+
+  SDL_SetRenderTarget(ren_.get(), mask.get());
+  SDL_SetRenderDrawColor(ren_.get(), 0, 0, 0, 0);
+  SDL_RenderClear(ren_.get());
+
+  for (int y = game.map.getTop(); y < game.map.getBottom(); y++)
+  {
+    for (int x = game.map.getLeft(); x < game.map.getRight(); x++)
+    {
+      if (game.map.at(x,y).lightType != Source::None)
+      {
+        texture_ptr sourceMask(
+          SDL_CreateTexture(
+            ren_.get(),
+            SDL_PIXELFORMAT_RGBA8888,
+            SDL_TEXTUREACCESS_TARGET,
+            TILE_WIDTH * game.map.getWidth(),
+            TILE_HEIGHT * game.map.getHeight()));
+
+        if (!sourceMask)
+        {
+          throw sdl_error();
+        }
+
+        SDL_SetRenderTarget(ren_.get(), sourceMask.get());
+        SDL_SetRenderDrawBlendMode(ren_.get(), SDL_BLENDMODE_NONE);
+        SDL_SetRenderDrawColor(ren_.get(), 0, 0, 0, 0);
+        SDL_RenderClear(ren_.get());
+
+        int fadeX = game.map.getTrueX(x) - game.map.at(x,y).lightRadius;
+        int fadeY = game.map.getTrueY(y) - game.map.at(x,y).lightRadius;
+        int fadeRight = game.map.getTrueX(x) + game.map.at(x,y).lightRadius;
+        int fadeBottom = game.map.getTrueY(y) + game.map.at(x,y).lightRadius;
+
+        SDL_Rect fadeRect {
+          fadeX * TILE_WIDTH,
+          fadeY * TILE_HEIGHT,
+          (game.map.at(x,y).lightRadius * 2 + 1) * TILE_WIDTH,
+          (game.map.at(x,y).lightRadius * 2 + 1) * TILE_HEIGHT};
+
+        if (game.map.at(x,y).lightType == Source::Lamp)
+        {
+          SDL_SetTextureBlendMode(lampFade_.get(), SDL_BLENDMODE_NONE);
+          SDL_RenderCopy(ren_.get(), lampFade_.get(), nullptr, &fadeRect);
+        } else if (game.map.at(x,y).lightType == Source::Player) {
+          SDL_SetTextureBlendMode(playerFade_.get(), SDL_BLENDMODE_NONE);
+          SDL_RenderCopy(ren_.get(), playerFade_.get(), nullptr, &fadeRect);
+        } else if (game.map.at(x,y).lightType == Source::Dust) {
+          SDL_SetTextureBlendMode(dustFade_.get(), SDL_BLENDMODE_NONE);
+          SDL_RenderCopy(ren_.get(), dustFade_.get(), nullptr, &fadeRect);
+        }
+
+        SDL_SetRenderDrawColor(ren_.get(), 0, 0, 0, 0);
+
+        for (int sy = fadeY; sy < fadeBottom; sy++)
+        {
+          for (int sx = fadeX; sx < fadeRight; sx++)
+          {
+            if (!game.map.at(x,y).litTiles.count({sx, sy}))
+            {
+              SDL_Rect rect {
+                game.map.getTrueX(sx) * TILE_WIDTH,
+                game.map.getTrueY(sy) * TILE_HEIGHT,
+                TILE_WIDTH,
+                TILE_HEIGHT};
+
+              SDL_RenderFillRect(ren_.get(), &rect);
+            }
+          }
+        }
+
+        SDL_SetRenderTarget(ren_.get(), mask.get());
+        SDL_SetTextureBlendMode(sourceMask.get(), SDL_BLENDMODE_ADD);
+        SDL_RenderCopy(ren_.get(), sourceMask.get(), nullptr, nullptr);
+      }
+    }
+  }
+
+  SDL_SetRenderTarget(ren_.get(), canvas.get());
+  SDL_SetTextureBlendMode(mask.get(), SDL_BLENDMODE_MOD);
+  SDL_RenderCopy(ren_.get(), mask.get(), nullptr, nullptr);
+
+  SDL_SetRenderTarget(ren_.get(), nullptr);
+
+  if (!game.zooming)
+  {
+    SDL_RenderCopy(ren_.get(), canvas.get(), nullptr, nullptr);
+  } else {
+    // TODO: zooming back in to the player
+    SDL_Rect zoomRect {
+      ((game.maxZoom - game.curZoom) * TILE_WIDTH + game.zoomProgress)
+        * ZOOM_X_FACTOR / 2,
+      ((game.maxZoom - game.curZoom) * TILE_HEIGHT + game.zoomProgress)
+        * ZOOM_Y_FACTOR / 2,
+      (game.curZoom * TILE_WIDTH - game.zoomProgress) * ZOOM_X_FACTOR,
+      (game.curZoom * TILE_HEIGHT - game.zoomProgress) * ZOOM_Y_FACTOR
+    };
+
+    SDL_RenderCopy(ren_.get(), canvas.get(), &zoomRect, nullptr);
+  }
+
+  SDL_RenderPresent(ren_.get());
+}
diff --git a/src/renderer.h b/src/renderer.h
new file mode 100644
index 0000000..4aa27bb
--- /dev/null
+++ b/src/renderer.h
@@ -0,0 +1,132 @@
+#ifndef RENDERER_H_6A58EC30
+#define RENDERER_H_6A58EC30
+
+#include <SDL.h>
+#include <SDL_image.h>
+#include <stdexcept>
+#include <memory>
+
+class Game;
+
+class sdl_error : public std::logic_error {
+public:
+
+  sdl_error() : std::logic_error(SDL_GetError())
+  {
+  }
+};
+
+class img_error : public std::logic_error {
+public:
+
+  img_error() : std::logic_error(IMG_GetError())
+  {
+  }
+};
+
+class sdl_wrapper {
+public:
+
+  sdl_wrapper()
+  {
+    if (SDL_Init(SDL_INIT_VIDEO) != 0)
+    {
+      sdl_error ex;
+      SDL_Quit();
+
+    	throw ex;
+    }
+  }
+
+  ~sdl_wrapper()
+  {
+    SDL_Quit();
+  }
+};
+
+class img_wrapper {
+public:
+
+  img_wrapper()
+  {
+    if (IMG_Init(IMG_INIT_PNG) != IMG_INIT_PNG)
+    {
+      img_error ex;
+      IMG_Quit();
+
+      throw ex;
+    }
+  }
+
+  ~img_wrapper()
+  {
+    IMG_Quit();
+  }
+};
+
+class window_deleter {
+public:
+
+  void operator()(SDL_Window* ptr)
+  {
+    SDL_DestroyWindow(ptr);
+  }
+};
+
+using window_ptr = std::unique_ptr<SDL_Window, window_deleter>;
+
+class renderer_deleter {
+public:
+
+  void operator()(SDL_Renderer* ptr)
+  {
+    SDL_DestroyRenderer(ptr);
+  }
+};
+
+using renderer_ptr = std::unique_ptr<SDL_Renderer, renderer_deleter>;
+
+class surface_deleter {
+public:
+
+  void operator()(SDL_Surface* ptr)
+  {
+    SDL_FreeSurface(ptr);
+  }
+};
+
+using surface_ptr = std::unique_ptr<SDL_Surface, surface_deleter>;
+
+class texture_deleter {
+public:
+
+  void operator()(SDL_Texture* ptr)
+  {
+    SDL_DestroyTexture(ptr);
+  }
+};
+
+using texture_ptr = std::unique_ptr<SDL_Texture, texture_deleter>;
+
+class Renderer {
+public:
+
+  Renderer();
+
+  void render(
+    const Game& game,
+    bool drawDark = true);
+
+private:
+
+  sdl_wrapper sdl_;
+  img_wrapper img_;
+  window_ptr win_;
+  renderer_ptr ren_;
+
+  texture_ptr playerFade_;
+  texture_ptr lampFade_;
+  texture_ptr dustFade_;
+};
+
+#endif /* end of include guard: RENDERER_H_6A58EC30 */
-- 
cgit 1.4.1