Win32+OpenGL應用程序框架(77行代碼)

本文將介紹一種不依賴任何第三方庫，搭建自己Win32應用程序窗口的方法，程序總共長度為77行，源代碼下載請看附件。如果不清楚怎么一步一步實現的，可以移步去看OpenGL入門級課程的視頻教程。

#include <windows.h>
#include <gl/GL.h>
#include <gl/GLU.h>

#pragma comment(lib,"opengl32.lib")

LRESULT CALLBACK RenderWindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
	switch (msg)
	{
	case WM_CLOSE:
		PostQuitMessage(0);
		break;
	}
	return DefWindowProc(hwnd, msg, wParam, lParam);
}

INT WINAPI WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPSTR lpCmdLine, _In_ int nShowCmd)
{
	WNDCLASSEX wndClass;
	wndClass.cbClsExtra = 0;
	wndClass.cbSize = sizeof(WNDCLASSEX);
	wndClass.cbWndExtra = 0;
	wndClass.hbrBackground = NULL;
	wndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
	wndClass.hIcon = NULL;
	wndClass.hIconSm = NULL;
	wndClass.hInstance = hInstance;
	wndClass.lpfnWndProc = RenderWindowProc;
	wndClass.lpszClassName = L"OpenGLWindow";
	wndClass.lpszMenuName = NULL;
	wndClass.style = CS_HREDRAW | CS_VREDRAW;

	ATOM atom = RegisterClassEx(&wndClass);


	HWND hwnd = CreateWindowEx(NULL,L"OpenGLWindow",L"OpenGL Render Window",WS_OVERLAPPEDWINDOW,100,100,800,600,NULL,NULL,hInstance,NULL);
	
	HDC dc = GetDC(hwnd);
	PIXELFORMATDESCRIPTOR pfd;
	memset(&pfd, 0, sizeof(PIXELFORMATDESCRIPTOR));
	pfd.nVersion = 1;
	pfd.dwFlags = PFD_DOUBLEBUFFER | PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_TYPE_RGBA;
	pfd.iLayerType = PFD_MAIN_PLANE;
	pfd.iPixelType = PFD_TYPE_RGBA;
	pfd.cColorBits = 32;
	pfd.cDepthBits = 24;
	pfd.cStencilBits = 8;
	int pixelFormatID = ChoosePixelFormat(dc, &pfd);

	SetPixelFormat(dc, pixelFormatID, &pfd);

	HGLRC rc = wglCreateContext(dc);
	wglMakeCurrent(dc, rc);

	glClearColor(41.0 / 255.0f, 71.0f / 255.0f, 121.0f / 255.0f, 1.0f);
	ShowWindow(hwnd, SW_SHOW);
	UpdateWindow(hwnd);

	MSG msg;

	while (true)
	{
		if (PeekMessage(&msg,NULL,NULL,NULL,PM_REMOVE))
		{
			if (msg.message==WM_QUIT)
			{
				break;
			}
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
		glClear(GL_COLOR_BUFFER_BIT);
		SwapBuffers(dc);
	}
	return 0;
}