1 files changed, 309 insertions, 0 deletions

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+#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());
+}