[Add] Initialise SDL and OpenGL window.

client/CMakeLists.txt

@@ -4,4 +4,8 @@ add_executable(bettolac
   ${CLIENT_SOURCES}
 )
 
-target_link_libraries(bettolac PRIVATE bettola)
+find_package(SDL3 REQUIRED)
+find_package(GLEW REQUIRED)
+find_package(OpenGL REQUIRED)
+
+target_link_libraries(bettolac PRIVATE bettola SDL3::SDL3 GLEW::glew OpenGL::GL)

client/src/main.cpp

@@ -1,6 +1,75 @@
-#include "bettola.h"
+#include <cstdio>
+#include <GL/glew.h>
+#include <SDL3/SDL.h>
+#include <SDL3/SDL_error.h>
+#include <SDL3/SDL_events.h>
+#include <SDL3/SDL_oldnames.h>
+#include <SDL3/SDL_video.h>
 
 int main(int argc, char** argv) {
-  bettola_function();
+  /* Init SDL. */
+  if(!SDL_Init(SDL_INIT_VIDEO)) {
+    printf("SDL could not initialise! SDL_ERROR: %s\n", SDL_GetError());
+    return 1;
+  }
+
+  /* Set OpenGL attributes. */
+  SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
+  SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 3);
+  SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
+
+  /* Create a window. */
+  SDL_Window* window = SDL_CreateWindow(
+    "Bettola Client",
+    1280,
+    720,
+    SDL_WINDOW_OPENGL
+  );
+
+  if(window == NULL) {
+    printf("Unable to create window! SDL_ERROR: %s\n", SDL_GetError());
+    return 1;
+  }
+
+  /* Create OpenGL context. */
+  SDL_GLContext context = SDL_GL_CreateContext(window);
+  if(context == NULL) {
+    printf("OpenGL context could not be created! SDL_ERROR: %s\n", SDL_GetError());
+    return 1;
+  }
+
+  /* Initialise GLEW. */
+  glewExperimental = GL_TRUE;
+  GLenum glewError = glewInit();
+  if(glewError != GLEW_OK) {
+    printf("Error initialising GLEW! %s\n", glewGetErrorString(glewError));
+    return 1;
+  }
+
+  printf("SDL/OpenGL initialisation succes.\n");
+
+  bool running = true;
+  while(running) {
+    /* Event handling. */
+    SDL_Event event;
+    while(SDL_PollEvent(&event)) {
+      if(event.type == SDL_EVENT_QUIT) {
+        running = false;
+      }
+    }
+
+    /* Rendering. */
+    glClearColor(0.1f, 0.1f, 0.1, 1.0f);
+    glClear(GL_COLOR_BUFFER_BIT);
+
+    /* It's really odd to call it SwapWindow now, rather than SwapBuffer. */
+    SDL_GL_SwapWindow(window);
+  }
+
+  /* Cleanup. */
+  SDL_GL_DestroyContext(context);
+  SDL_DestroyWindow(window);
+  SDL_Quit();
+
   return 0;
 }