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可以说是最简单的OpenGL的Demo了。并没有使用OpenGL EW。
只是完全用OpenGL替代了WM_PAINT用GDI显示Hello World而已。
从这个方面来说,D3D的初始化太麻烦了。
- //=============================================================================
- //作者:0xAA55
- //网址:http://www.0xaa55.com/
- //请保留原作者信息,否则视为侵权。
- //-----------------------------------------------------------------------------
- #include<tchar.h>
- #include<Windows.h>
- #include<gl/GL.h>
- LRESULT CALLBACK WndProc(HWND hWnd,UINT uMsg,WPARAM wp,LPARAM lp);//消息处理函数
- HDC hDC;//HDC上下文
- HGLRC hRC;//OpenGL上下文
- //=============================================================================
- //函数:InitOpenGL
- //描述:初始化OpenGL
- //-----------------------------------------------------------------------------
- void InitOpenGL(HDC hDC)
- {
- PIXELFORMATDESCRIPTOR PFD={0};
- int nPixelFormat;
- PFD.nSize =sizeof(PFD);
- PFD.nVersion =1;
- PFD.dwFlags =PFD_DRAW_TO_WINDOW|PFD_SUPPORT_OPENGL|PFD_DOUBLEBUFFER;
- PFD.iPixelType =PFD_TYPE_RGBA;
- //后台缓冲区格式
- PFD.cDepthBits =32;
- PFD.cAlphaBits =8; PFD.cAlphaShift =24;
- PFD.cBlueBits =8; PFD.cBlueShift =16;
- PFD.cGreenBits =8; PFD.cGreenShift =8;
- PFD.cRedBits =8; PFD.cRedShift =0;
- PFD.iLayerType =PFD_MAIN_PLANE;
- nPixelFormat=ChoosePixelFormat(hDC,&PFD);
- SetPixelFormat(hDC,nPixelFormat,&PFD);//设置格式使其兼容OpenGL
- hRC=wglCreateContext(hDC);//得到OpenGL上下文
- if(!hRC)
- goto Cleanup;
- Cleanup:
- //MessageBox(NULL,TEXT("初始化OpenGL没成功。"),TEXT("Fuck!"),MB_ICONERROR);
- return;
- }
- //=============================================================================
- //函数:_tWinMain
- //描述:整个程序的入口点
- //-----------------------------------------------------------------------------
- int APIENTRY _tWinMain
- (
- HINSTANCE hInst,
- HINSTANCE hPrevInst,
- LPTSTR szCmdLine,
- int nShowCmd
- )
- {
- WNDCLASSEX WndClass;
- ATOM ClassAtom=0;
- HWND hWnd;
- MSG msg;
- //注册窗口类
- memset(&WndClass,0,sizeof(WndClass));
- WndClass.cbSize=sizeof(WndClass);
- WndClass.lpfnWndProc=WndProc;
- WndClass.hInstance=hInst;
- WndClass.hIcon=LoadIcon(hInst,MAKEINTRESOURCE(IDI_APPLICATION));
- WndClass.hCursor=LoadCursor(hInst,MAKEINTRESOURCE(IDC_ARROW));
- WndClass.hbrBackground=(HBRUSH)(COLOR_BTNFACE+1);
- WndClass.lpszClassName=TEXT("NormalWindow");
- WndClass.hIconSm=LoadIcon(hInst,MAKEINTRESOURCE(IDI_APPLICATION));
- ClassAtom=RegisterClassEx(&WndClass);
- if(!ClassAtom)
- goto Cleanup;
- //创建窗口
- hWnd=CreateWindowEx(0,(LPCTSTR)ClassAtom,TEXT("主窗口"),
- WS_OVERLAPPEDWINDOW,
- CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,
- NULL,NULL,hInst,NULL);
- if(!hWnd)
- goto Cleanup;
- //显示窗口
- ShowWindow(hWnd,nShowCmd);
- UpdateWindow(hWnd);
- hDC=GetDC(hWnd);//取得窗口的GDI绘图句柄
- InitOpenGL(hDC);//初始化OpenGL
- //消息循环
- while(GetMessage(&msg,NULL,0,0))
- {
- TranslateMessage(&msg);
- DispatchMessage(&msg);
- }
- ReleaseDC(hWnd,hDC);
- UnregisterClass((LPCTSTR)ClassAtom,hInst);
- return 0;
- Cleanup:
- if(ClassAtom)
- UnregisterClass((LPCTSTR)ClassAtom,hInst);
- MessageBox(NULL,TEXT("启动程序失败。"),TEXT("无法启动程序"),MB_ICONEXCLAMATION);
- return 1;
- }
- //=============================================================================
- //函数:WndProc
- //描述:窗口消息处理程序
- //-----------------------------------------------------------------------------
- LRESULT CALLBACK WndProc(HWND hWnd,UINT uMsg,WPARAM wp,LPARAM lp)
- {
- RECT rc;
- switch(uMsg)
- {
- case WM_DESTROY:
- PostQuitMessage(0);
- break;
- case WM_PAINT:
- wglMakeCurrent(hDC,hRC);//使OpenGL获取焦点
- GetClientRect(hWnd,&rc);//取得客户区域的大小
- glViewport(rc.left,rc.top,rc.right-rc.left,rc.bottom-rc.top);//设置观察区域大小
- glClear(GL_COLOR_BUFFER_BIT);//擦除画板
- glBegin(GL_TRIANGLES);//画三角形表
- glColor4d(1.0,0.0,0.0,1.0);//红色
- glVertex2d( 0.0, 0.5);//三角形的顶角
- glColor4d(0.0,1.0,0.0,1.0);//绿色
- glVertex2d(-0.5,-0.5);//三角形的左角
- glColor4d(0.0,0.0,1.0,1.0);//蓝色
- glVertex2d( 0.5,-0.5);//三角形的右角
- glEnd();//提交三角形表
- glFlush();//让显卡渲染
- SwapBuffers(hDC);//把画板内容刷到屏幕上
- wglMakeCurrent(NULL,NULL);//释放焦点
- break;
- default:
- return DefWindowProc(hWnd,uMsg,wp,lp);
- }
- return 0;
- }
复制代码 BIN:
UseGL.exe
(74.5 KB, 下载次数: 3)
SRC:
UseGL.7z
(3.51 KB, 下载次数: 1, 售价: 1 个宅币)
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