// StgSharpGraphics.c : 定义 DLL 的导出函数。
//

#include "StgSharpGraphics.h"
#include "glad/glad.h"
#include "GLFW/glfw3.h"
#include "framework.h"
#include "stdio.h"
#include "internal.h"

int version[4] = { 0,0,0,0 };
STGSHARPGRAPHICS_API int* versionInfo = &version;


// 这是导出函数的一个示例。
STGSHARPGRAPHICS_API int fnStgSharpGraphics(void)
{
    return 0;
}

STGSHARPGRAPHICS_API IOpackage initPackage(void)
{
    IOpackage pack;
    pack.InitWindow = initWindow;
    return pack;
}

STGSHARPGRAPHICS_API int initWindow(int width, int height)
{
   glfwInit();
   glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
   glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
   glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);

#ifdef __APPLE__
   glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
#endif // __APPLE__

   GLFWwindow* window = glfwCreateWindow(width, height, "LearnOpenGL", NULL, NULL);
   if (window == NULL)
   {
      printf("Failed to create GLFW window");
      glfwTerminate();
      return -1;
   }
   glfwMakeContextCurrent(window);

   if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress))
   {
      printf("Failed to initialize GLAD");
      return -1;
   }

   while (!glfwWindowShouldClose(window))
   {
      // input
      // -----

      // render
      // ------
      glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
      glClear(GL_COLOR_BUFFER_BIT);

      // glfw: swap buffers and poll IO events (keys pressed/released, mouse moved etc.)
      // -------------------------------------------------------------------------------
      glfwSwapBuffers(window);
      glfwPollEvents();
   }

   // glfw: terminate, clearing all previously allocated GLFW resources.
   // ------------------------------------------------------------------
   glfwTerminate();

   return 0;
}