From 5f383da62c7a80526634b68c28d7ba9d9e693e75 Mon Sep 17 00:00:00 2001
From: Samuel Johnson <sjohnson1149@proton.me>
Date: Wed, 7 May 2025 00:08:29 -0400
Subject: Create html shell wrapper for game

---
 .gitignore        |  10 +++++
 CMakeLists.txt    |  35 ++++++++++++++++
 starless/main.cpp | 123 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 vcpkg.json        |  17 ++++++++
 wrapper.html      |  91 ++++++++++++++++++++++++++++++++++++++++
 5 files changed, 276 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 starless/main.cpp
 create mode 100644 vcpkg.json
 create mode 100644 wrapper.html

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..5de5580
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,10 @@
+assets/
+build/
+.cache/
+
+*.exe
+*.out
+*.d
+*.o
+
+*.swp
diff --git a/CMakeLists.txt b/CMakeLists.txt
index e69de29..a460e57 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -0,0 +1,35 @@
+cmake_minimum_required(VERSION 3.19...4.0)
+
+option(BUILD_NATIVE "Compile for host toolchain instead of web" OFF)
+if (NOT BUILD_NATIVE)
+    message("Compiling with emscripten...")
+    set(VCPKG_CHAINLOAD_TOOLCHAIN_FILE "$ENV{EMSDK}/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake")
+    set(VCPKG_TARGET_TRIPLET "wasm32-emscripten")
+endif()
+
+set(CMAKE_TOOLCHAIN_FILE "${CMAKE_CURRENT_SOURCE_DIR}/vendor/vcpkg/scripts/buildsystems/vcpkg.cmake" CACHE STRING "Vcpkg toolchain")
+
+project(starless VERSION 0.1 LANGUAGES C CXX)
+
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${PROJECT_BINARY_DIR}/bin")
+
+file(
+    GLOB_RECURSE SOURCE_FILES
+    CONFIGURE_DEPENDS
+    ${PROJECT_SOURCE_DIR}/starless/*.cpp
+)
+
+add_executable(${PROJECT_NAME} ${SOURCE_FILES})
+target_include_directories(${PROJECT_NAME} PRIVATE .)
+target_compile_features(${PROJECT_NAME} PRIVATE cxx_std_17)
+
+if (NOT BUILD_NATIVE)
+    target_link_options(${PROJECT_NAME} PRIVATE --preload-file "${CMAKE_CURRENT_SOURCE_DIR}/data@data" --shell-file "${CMAKE_CURRENT_SOURCE_DIR}/wrapper.html")
+    set_target_properties(${PROJECT_NAME} PROPERTIES SUFFIX ".html")
+endif()
+
+find_package(SDL3 CONFIG REQUIRED)
+find_package(Lua CONFIG REQUIRED)
+find_package(libtcod CONFIG REQUIRED)
+target_link_libraries(${PROJECT_NAME} PRIVATE SDL3::SDL3 libtcod::libtcod ${LUA_LIBRARIES})
diff --git a/starless/main.cpp b/starless/main.cpp
new file mode 100644
index 0000000..458b521
--- /dev/null
+++ b/starless/main.cpp
@@ -0,0 +1,123 @@
+#define SDL_MAIN_USE_CALLBACKS
+#include <SDL3/SDL.h>
+#include <SDL3/SDL_main.h>
+
+#include <cstdlib>
+#include <filesystem>
+#include <iostream>
+#include <libtcod.hpp>
+
+/// Return the data directory.
+auto get_data_dir() -> std::filesystem::path {
+  static auto root_directory = std::filesystem::path{"."};  // Begin at the working directory.
+  while (!std::filesystem::exists(root_directory / "data")) {
+    // If the current working directory is missing the data dir then it will assume it exists in any parent directory.
+    root_directory /= "..";
+    if (!std::filesystem::exists(root_directory)) {
+      throw std::runtime_error("Could not find the data directory.");
+    }
+  }
+  return root_directory / "data";
+};
+
+static constexpr auto WHITE = tcod::ColorRGB{255, 255, 255};
+
+static tcod::Console g_console;  // The global console object.
+static tcod::Context g_context;  // The global libtcod context.
+
+static int player_x{};
+static int player_y{};
+
+// Called every frame
+SDL_AppResult SDL_AppIterate(void*) {
+  g_console.clear();
+  if (g_console.in_bounds({player_x, player_y})) {
+    g_console.at({player_x, player_y}).ch = '@';
+  }
+  g_context.present(g_console);
+  return SDL_APP_CONTINUE;
+}
+// Handle events
+SDL_AppResult SDL_AppEvent(void*, SDL_Event* event) {
+  switch (event->type) {
+    case SDL_EVENT_KEY_DOWN:
+      switch (event->key.key) {
+        case SDLK_LEFT:  // Arrow key
+        case SDLK_H:  // Vi key
+        case SDLK_KP_4:  // Keypad
+          player_x -= 1;
+          break;
+        case SDLK_RIGHT:
+        case SDLK_L:
+        case SDLK_KP_6:
+          player_x += 1;
+          break;
+        case SDLK_UP:
+        case SDLK_K:
+        case SDLK_KP_8:
+          player_y -= 1;
+          break;
+        case SDLK_DOWN:
+        case SDLK_J:
+        case SDLK_KP_2:
+          player_y += 1;
+          break;
+        case SDLK_HOME:
+        case SDLK_Y:
+        case SDLK_KP_7:
+          player_x -= 1;
+          player_y -= 1;
+          break;
+        case SDLK_PAGEUP:
+        case SDLK_U:
+        case SDLK_KP_9:
+          player_x += 1;
+          player_y -= 1;
+          break;
+        case SDLK_END:
+        case SDLK_B:
+        case SDLK_KP_1:
+          player_x -= 1;
+          player_y += 1;
+          break;
+        case SDLK_PAGEDOWN:
+        case SDLK_N:
+        case SDLK_KP_3:
+          player_x += 1;
+          player_y += 1;
+          break;
+        case SDLK_PERIOD:
+        case SDLK_CLEAR:
+        case SDLK_KP_5:
+          break;
+      }
+      break;
+    case SDL_EVENT_QUIT:
+      return SDL_APP_SUCCESS;
+  }
+  return SDL_APP_CONTINUE;
+}
+// Main entry point
+SDL_AppResult SDL_AppInit(void**, int argc, char** argv) {
+  auto params = TCOD_ContextParams{};
+  params.argc = argc;
+  params.argv = argv;
+  params.renderer_type = TCOD_RENDERER_SDL2;
+  params.vsync = 1;
+  params.sdl_window_flags = SDL_WINDOW_RESIZABLE;
+  params.window_title = "This Starless Sky - Paterissa";
+
+  auto tileset = tcod::load_tilesheet(get_data_dir() / "assets/dejavu16x16_gs_tc.png", {32, 8}, tcod::CHARMAP_TCOD);
+  params.tileset = tileset.get();
+
+  g_console = tcod::Console{80, 40};
+  player_x = g_console.get_width() / 2;
+  player_y = g_console.get_height() / 2;
+  params.console = g_console.get();
+
+  g_context = tcod::Context(params);
+
+  return SDL_APP_CONTINUE;
+}
+// Called before existing
+void SDL_AppQuit(void*, SDL_AppResult) {}
diff --git a/vcpkg.json b/vcpkg.json
new file mode 100644
index 0000000..a5b8de9
--- /dev/null
+++ b/vcpkg.json
@@ -0,0 +1,17 @@
+{
+  "$schema": "https://raw.githubusercontent.com/microsoft/vcpkg-tool/main/docs/vcpkg.schema.json",
+  "dependencies": [
+    {
+      "name": "libtcod",
+      "default-features": true,
+      "features": [
+        "png",
+        "sdl",
+        "unicode",
+        "zlib"
+      ]
+    },
+    "sdl3",
+    "lua"
+  ]
+}
diff --git a/wrapper.html b/wrapper.html
new file mode 100644
index 0000000..0bd537b
--- /dev/null
+++ b/wrapper.html
@@ -0,0 +1,91 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <meta charset="utf-8">
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+    <style>
+        body {
+            color: white;
+            background-color: black;
+        }
+
+        header {
+            text-align: center;
+        }
+
+        #loading_bg {
+            position: absolute;
+            left: 25%;
+            top: 50%;
+
+            width: 50%;
+            background-color: grey;
+        }
+
+        #loading_bar {
+            width: 0%;
+            padding: 2px;
+            background-color: red;
+        }
+
+        .game_canvas {
+            display: none;
+            margin: auto;
+            outline-style: double;
+            outline-color: red;
+        }
+    </style>
+</head>
+<body>
+    <header>
+        <h1>This Starless Sky</h1>
+        <p>we are deserving of no gifts.</p?
+    </header>
+    <main>
+        <div id="loading_bg">
+            <div id="loading_bar"></div>
+        </div>
+        <canvas class="game_canvas" id="canvas" oncontextmenu="event.preventDefault()" tabindex=-1></canvas>
+    </main>
+    <script>
+        let progressBar = document.getElementById("loading_bar");
+        let canvas = document.getElementById("canvas");
+        
+        function convertStatusToNumeric (status) {
+            if (status === "Running...") {
+                return 100;
+            } else  if (status.length === 0) {
+                return 0;
+            }
+
+            // Ungodly regex from the depths of hell, see
+            // https://github.com/emscripten-core/emscripten/issues/16278#issuecomment-2178303577
+            const regExp = RegExp(/([^(]+)\((\d+(\.\d+)?)\/(\d+)\)/);
+            const matches = regExp.exec(status);
+
+            if (matches) {
+                const currentValue = parseInt(matches[2]);
+                const maxValue = parseInt(matches[4]);
+                return (currentValue * 100) / maxValue;
+            } else {
+                return NaN;
+            }
+        }
+
+        var Module = {
+            setStatus (status) {
+                if (progressBar.style.width !== "100%") {
+                    const percentage = convertStatusToNumeric(status);
+                    progressBar.style.width = percentage + "%";
+                } else {
+                    progressBar.style.display = "none";
+                    canvas.style.display = "block";
+                }
+            },
+
+        };
+    </script>
+    {{{ SCRIPT }}}
+</body>
+</html>
+
-- 
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