Display

CMakeLists.txt

@@ -14,11 +14,10 @@ set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR}/cmake/mod
 
 if(NOT DEFINED DAWN_TARGET_SYSTEM)
   set(DAWN_TARGET_SYSTEM "linux")
-  # set(DAWN_TARGET_SYSTEM "psp")
 endif()
 
 # Prep cache
-set(DAWN_CACHE_TARGET "dusk-target")
+set(DAWN_CACHE_TARGET "dawn-target")
 
 # Build variables
 set(DAWN_ROOT_DIR "${CMAKE_SOURCE_DIR}")
@@ -30,8 +29,8 @@ set(DAWN_DATA_DIR "${DAWN_ROOT_DIR}/data")
 set(DAWN_ASSETS_DIR "${DAWN_ROOT_DIR}/assets")
 set(DAWN_BUILT_ASSETS_DIR "${DAWN_BUILD_DIR}/built_assets" CACHE INTERNAL ${DAWN_CACHE_TARGET})
 set(DAWN_GENERATED_HEADERS_DIR "${DAWN_BUILD_DIR}/generated")
-set(DAWN_TARGET_NAME "Dusk" CACHE INTERNAL ${DAWN_CACHE_TARGET})
+set(DAWN_TARGET_NAME "Dawn" CACHE INTERNAL ${DAWN_CACHE_TARGET})
-set(DAWN_BUILD_BINARY ${DAWN_BUILD_DIR}/Dusk CACHE INTERNAL ${DAWN_CACHE_TARGET})
+set(DAWN_BUILD_BINARY ${DAWN_BUILD_DIR}/Dawn CACHE INTERNAL ${DAWN_CACHE_TARGET})
 set(DAWN_ASSETS "" CACHE INTERNAL ${DAWN_CACHE_TARGET})
 
 # Create directories
@@ -64,7 +63,8 @@ add_executable(${DAWN_TARGET_NAME})
 if(DAWN_TARGET_SYSTEM STREQUAL "linux")
   find_package(SDL2 REQUIRED)
   find_package(OpenGL REQUIRED)
-  target_link_libraries(${DAWN_TARGET_NAME} PRIVATE 
+  target_link_libraries(${DAWN_TARGET_NAME}
+    PRIVATE 
       SDL2
       OpenGL::GL
       GL
@@ -73,7 +73,8 @@ if(DAWN_TARGET_SYSTEM STREQUAL "linux")
 elseif(DAWN_TARGET_SYSTEM STREQUAL "psp")
   find_package(SDL2 REQUIRED)
   find_package(OpenGL REQUIRED)
-  target_link_libraries(${DAWN_TARGET_NAME} PUBLIC
+  target_link_libraries(${DAWN_TARGET_NAME}
+    PUBLIC
       ${SDL2_LIBRARIES}
       SDL2
       OpenGL::GL

src/CMakeLists.txt

@@ -29,5 +29,21 @@ target_sources(${DAWN_TARGET_NAME}
 # Subdirs
 add_subdirectory(assert)
 add_subdirectory(console)
+add_subdirectory(display)
 add_subdirectory(engine)
 add_subdirectory(time)
+
+# Platform-specific settings
+if(DAWN_TARGET_SYSTEM STREQUAL "linux")
+  target_compile_definitions(${DAWN_TARGET_NAME}
+    PRIVATE
+      DAWN_SDL2=1
+      DAWN_SDL2_GAMEPAD=1
+  )
+elseif(DAWN_TARGET_SYSTEM STREQUAL "psp")
+  target_compile_definitions(${DAWN_TARGET_NAME}
+    PRIVATE
+      DAWN_SDL2=1
+      DAWN_SDL2_GAMEPAD=1
+  )
+endif()

src/console/CMakeLists.txt

@@ -4,7 +4,7 @@
 # https://opensource.org/licenses/MIT
 
 # Sources
-target_sources(${DUSK_TARGET_NAME}
+target_sources(${DAWN_TARGET_NAME}
   PRIVATE
     Console.cpp
 )

src/dawn.hpp

@@ -37,6 +37,14 @@ extern "C" {
   typedef char char_t;
 }
 
+#if DAWN_SDL2
+  #include <SDL2/SDL.h>
+
+  #define GL_GLEXT_PROTOTYPES
+  #include <GL/gl.h>
+  #include <GL/glext.h>
+#endif
+
 #include <memory>
 #include <string>
 #include <vector>

src/display/CMakeLists.txt

@@ -0,0 +1,10 @@
+# Copyright (c) 2025 Dominic Masters
+# 
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+# Sources
+target_sources(${DAWN_TARGET_NAME}
+  PRIVATE
+    Display.cpp
+)

src/display/Display.cpp

@@ -0,0 +1,121 @@
+// Copyright (c) 2025 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "Display.hpp"
+#include "engine/Engine.hpp"
+
+using namespace Dawn;
+
+Display::Display(void) :
+  #if DAWN_SDL2
+    glContext(nullptr),
+    window(nullptr)
+  #endif
+{
+  #if DAWN_SDL2
+    uint32_t flags = SDL_INIT_VIDEO;
+    #if DAWN_SDL2_GAMEPAD
+      flags |= SDL_INIT_GAMECONTROLLER | SDL_INIT_JOYSTICK;
+    #endif
+
+    if(SDL_Init(flags) != 0) {
+      throw "Failed to initialize SDL2";
+    }
+    
+    // Set OpenGL Attributes
+    SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
+
+    // Create window
+    this->window = SDL_CreateWindow(
+      "Dawn",
+      SDL_WINDOWPOS_CENTERED,
+      SDL_WINDOWPOS_CENTERED,
+      DEFAULT_WIDTH,
+      DEFAULT_HEIGHT,
+      SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI | 
+      SDL_WINDOW_SHOWN
+    );
+    if(!this->window) {
+      throw "Failed to create SDL2 window";
+    }
+
+    // Create OpenGL context
+    this->glContext = SDL_GL_CreateContext(this->window);
+    if(!this->glContext) {
+      throw "Failed to create OpenGL context";
+    }
+
+    // Setup GL
+    SDL_GL_SetSwapInterval(1);// Enable vsync
+    glDisable(GL_DEPTH_TEST);
+    glDisable(GL_CULL_FACE);
+    glDisable(GL_LIGHTING);// PSP defaults this on?
+    glShadeModel(GL_SMOOTH);// Fixes color on PSP?
+    glEnable(GL_BLEND);
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+    glPixelStorei(GL_PACK_ALIGNMENT, 1);
+    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+
+    glEnableClientState(GL_COLOR_ARRAY);// TODO: every frame on PSP?
+    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+    glEnableClientState(GL_VERTEX_ARRAY);
+  #else
+    #error "No display platform defined"
+  #endif
+}
+
+void Display::update(void) {
+  #if DAWN_SDL2
+    SDL_Event event;
+    while(SDL_PollEvent(&event)) {
+      switch(event.type) {
+        case SDL_QUIT: {
+          Engine::getInstance()->console.exec("exit");
+          break;
+        }
+
+        case SDL_WINDOWEVENT: {
+          switch(event.window.event) {
+            case SDL_WINDOWEVENT_CLOSE: {
+              Engine::getInstance()->console.exec("exit");
+              break;
+            }
+
+            default: {
+              break;
+            }
+          }
+          break;
+        }
+
+        default: {
+          break;
+        }
+      }
+    }
+
+    SDL_GL_MakeCurrent(this->window, this->glContext);
+
+    glViewport(0, 0, DEFAULT_WIDTH, DEFAULT_HEIGHT);
+
+    SDL_GL_SwapWindow(this->window);
+  #endif
+}
+
+Display::~Display(void) {
+  #if DAWN_SDL2
+    if(this->glContext) {
+      SDL_GL_DeleteContext(this->glContext);
+      this->glContext = nullptr;
+    }
+
+    if(this->window) {
+      SDL_DestroyWindow(this->window);
+      this->window = nullptr;
+    }
+
+    SDL_Quit();
+  #endif
+}

src/display/Display.hpp

@@ -0,0 +1,36 @@
+// Copyright (c) 2025 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "dawn.hpp"
+
+namespace Dawn {
+  struct Display {
+    private:
+      #if DAWN_SDL2
+        SDL_Window* window;
+        SDL_GLContext glContext;
+      #endif
+
+    public:
+      static constexpr uint32_t DEFAULT_WIDTH = 800;
+      static constexpr uint32_t DEFAULT_HEIGHT = 600;
+
+      /**
+       * Display constructor
+       */
+      Display(void);
+
+      /**
+       * Update the display (swap buffers, etc.)
+       */
+      void update(void);
+
+      /**
+       * Display destructor
+       */
+      ~Display(void);
+  };
+}

src/engine/CMakeLists.txt

@@ -4,7 +4,7 @@
 # https://opensource.org/licenses/MIT
 
 # Sources
-target_sources(${DUSK_TARGET_NAME}
+target_sources(${DAWN_TARGET_NAME}
   PRIVATE
     Engine.cpp
 )

src/engine/Engine.cpp

@@ -7,25 +7,33 @@
 
 using namespace Dawn;
 
+std::shared_ptr<Engine> Engine::instance = nullptr;
+
+std::shared_ptr<Engine> Engine::getInstance() {
+  if(!Engine::instance) {
+    Engine::instance = std::make_shared<Engine>();
+  }
+  return Engine::instance;
+}
+
 Engine::Engine() :
   time(),
-  console()
+  console(),
+  display()
 {
-  // console.registerCommand("echo", [](std::vector<std::string> &args) {
+  console.registerCommand("exit", [this](std::vector<std::string> &args) {
-  //   if(args.size() == 0) {
+    this->exitRequested = true;
-  //     std::cout << "Usage: echo <message>" << std::endl;
+  });
-  //     return;
+}
-  //   }
 
-  //   std::cout << args[0] << std::endl;
+bool_t Engine::isExitRequested() const {
-  // });
+  return this->exitRequested;
-
-  // console.exec("echo");
 }
 
 void Engine::update(void) {
   time.update();
   console.update();
+  display.update();
 }
 
 Engine::~Engine() {

src/engine/Engine.hpp

@@ -6,18 +6,39 @@
 #pragma once
 #include "time/Time.hpp"
 #include "console/Console.hpp"
+#include "display/Display.hpp"
 
 namespace Dawn {
   struct Engine {
+    private:
+      static std::shared_ptr<Engine> instance;
+
+      bool_t exitRequested = false;
+
     public:
       Time time;
       Console console;
+      Display display;
+
+      /**
+       * Get the singleton instance of the engine.
+       * 
+       * @return A shared pointer to the engine instance.
+       */
+      static std::shared_ptr<Engine> getInstance();
 
       /**
        * Constructor for the Dawn engine.
        */
       Engine();
 
+      /**
+       * Check if an exit has been requested.
+       * 
+       * @return True if an exit has been requested, false otherwise.
+       */
+      bool_t isExitRequested() const;
+
       /**
        * Update the engine state.
        */

src/main.cpp

@@ -8,16 +8,12 @@
 
 using namespace Dawn;
 
-static std::shared_ptr<Engine> engine;
-
 int main(int argc, char **argv) {
-  engine = std::make_shared<Engine>();
+  auto engine = Engine::getInstance();
 
-  while(1) {
+  while(!engine->isExitRequested()) {
     engine->update();
-    break;
   }
 
-  engine = nullptr;
   return 0;
 }

src/time/Time.cpp

@@ -20,10 +20,10 @@ Time::Time(void) :
 void Time::update(void) {
   float_t delta;
 
-  #if TIME_SDL2
+  #if DAWN_SDL2
     delta = (float_t)SDL_GetTicks() / 1000.0f - this->time;
   #else
-
+    #error "No time platform defined"
   #endif
 
   this->delta = delta;