#include <gl/opengl.h>
HGLRC hRC = NULL;
HDC hDC = NULL;
HWND hWnd = NULL;
HINSTANCE hInstance = NULL;
BOOL keys[256];
BOOL active = TRUE;
BOOL fullscreen = FALSE;
GLfloat rtri = 0.0f;
GLfloat rquad = 360.0f;
LRESULT CALLBACK WindowProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
GLvoid ReSizeGLScene(GLsizei width, GLsizei height){
if (height == 0) height = 1;
glViewport(0,0,width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45.0f, (GLdouble)width/(GLdouble)height, 0.1f, 100.0f);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
GLvoid InitGL(){
glShadeModel(GL_SMOOTH);
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
}
BOOL DrawGLScene(){
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
glTranslatef(-1.5f, 0.0f, -6.0f);
glRotatef(rtri, 0.0f, 1.0f, 0.0f);
glBegin(GL_TRIANGLES);
glColor3f(1.0f, 0.0f, 0.0f);
glVertex3f(0.0f, 1.0f, 0.0f);
glColor3f(0.0f, 1.0f, 0.0f);
glVertex3f(-1.0f, -1.0f, 0.0f);
glColor3f(0.0f, 0.0f, 1.0f);
glVertex3f(1.0f, -1.0f, 0.0f);
glEnd();
glLoadIdentity();
glTranslatef(1.5f, 0.0f, -6.0f);
glRotatef(rquad, 1.0f, 0.0f, 0.0f);
glColor3f(0.5f, 0.5f, 1.0f);
glBegin(GL_QUADS);
glVertex3f(-1.0f, 1.0f, 0.0f);
glVertex3f( 1.0f, 1.0f, 0.0f);
glVertex3f( 1.0f,-1.0f, 0.0f);
glVertex3f(-1.0f,-1.0f, 0.0f);
glEnd();
if (rtri>= 360.0f) rtri = 0.0f;
rtri += 0.2f;
if (rquad <= 0.0f) rquad = 360.0f;
rquad -= 0.15f;
return TRUE;
}
GLvoid KillGLWindow(){
if (fullscreen){
ChangeDisplaySettings(NULL, 0);
ShowCursor(FALSE);
}
if (hRC){
if (!wglMakeCurrent(NULL, NULL))
MessageBox(NULL, "释放DC 或 RC 失败", "错误", MB_OK);
if (!wglDeleteContext(hRC))
MessageBox(NULL, "释放RC失败", "错误", MB_OK);
hRC = NULL;
}
if (hDC && !ReleaseDC(hWnd, hDC)){
MessageBox(NULL, "释放DC失败", "错误", MB_OK);
hDC = NULL;
}
if (hWnd && !DestroyWindow(hWnd)){
MessageBox(NULL, "销毁窗口失败", "错误", MB_OK);
hWnd = NULL;
}
if (!UnregisterClass("opengl", hInstance)){
MessageBox(NULL, "反注册失败", "错误", MB_OK);
hInstance = NULL;
}
}
BOOL CreateGLWindow(char* title, int width, int height, int bits, HINSTANCE hInstance, bool fullscreenflag){
GLuint PixelFormat;
WNDCLASS wc;
DWORD dwStyle;
DWORD dwExStyle;
RECT WindowRect;
WindowRect.left = (long)0;
WindowRect.right= (long)width;
WindowRect.top = (long)0;
WindowRect.bottom = (long)height;
fullscreen = fullscreenflag;
wc.hInstance = hInstance;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
wc.lpfnWndProc = WindowProc;
wc.hIcon = LoadIcon(NULL, IDI_WINLOGO);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = NULL;
wc.lpszClassName = "opengl";
wc.lpszMenuName = NULL;
if (!RegisterClass(&wc)){
MessageBox(NULL, "窗口注册失败", "错误", MB_OK);
return FALSE;
}
if (fullscreen){
DEVMODE dmScreenSetting;
memset(&dmScreenSetting, 0, sizeof(dmScreenSetting));
dmScreenSetting.dmSize = sizeof(dmScreenSetting);
dmScreenSetting.dmBitsPerPel = bits;
dmScreenSetting.dmPelsHeight = height;
dmScreenSetting.dmPelsWidth = width;
dmScreenSetting.dmFields = DM_BITSPERPEL | DM_PELSHEIGHT | DM_PELSWIDTH;
if (ChangeDisplaySettings(&dmScreenSetting, CDS_FULLSCREEN)!= DISP_CHANGE_SUCCESSFUL){
if (MessageBox(NULL, "当前显卡不支持全屏操做\n使用窗口模式?", "错误", MB_YESNO|MB_ICONEXCLAMATION) == IDYES){
fullscreen = FALSE;
}
else{
MessageBox(NULL, "程序将会被关闭", "错误", MB_OK|MB_ICONEXCLAMATION);
return FALSE;
}
}
}
if (fullscreen){
dwExStyle = WS_EX_APPWINDOW;
dwStyle = WS_POPUP;
ShowCursor(FALSE);
}
else{
dwExStyle = WS_EX_APPWINDOW | WS_EX_WINDOWEDGE;
dwStyle = WS_OVERLAPPEDWINDOW;
}
dwStyle = dwStyle | WS_CLIPCHILDREN|WS_CLIPSIBLINGS;
AdjustWindowRectEx(&WindowRect, dwStyle, FALSE, dwExStyle);
if (!(hWnd = CreateWindowEx(dwExStyle, "opengl", title, dwStyle, 0,0, WindowRect.right-WindowRect.left, WindowRect.bottom-WindowRect.top, NULL, NULL, hInstance, NULL))){
KillGLWindow();
MessageBox(NULL, "不能创建一个窗口设备描述表", "错误", MB_OK);
return FALSE;
}
static PIXELFORMATDESCRIPTOR pfd = {
sizeof(PIXELFORMATDESCRIPTOR),
1,
PFD_DRAW_TO_WINDOW|
PFD_SUPPORT_OPENGL|
PFD_DOUBLEBUFFER,
PFD_TYPE_RGBA,
bits,
0, 0, 0, 0, 0, 0,
0,
0,
0,
0, 0, 0, 0,
16,
0,
0,
PFD_MAIN_PLANE,
0,
0, 0, 0
};
if (!(hDC = GetDC(hWnd))){
KillGLWindow();
MessageBox(NULL, "不能创建一个相匹配的像素模式", "错误", MB_OK|MB_ICONEXCLAMATION);
return FALSE;
}
if (!(PixelFormat = ChoosePixelFormat(hDC, &pfd))){
KillGLWindow();
MessageBox(NULL, "不能设置像素格式", "错误", MB_OK|MB_ICONEXCLAMATION);
return FALSE;
}
if (!SetPixelFormat(hDC, PixelFormat, &pfd)){
KillGLWindow();
MessageBox(NULL, "不能设置像素格式", "错误",MB_OK|MB_ICONEXCLAMATION);
return FALSE;
}
if (!(hRC = wglCreateContext(hDC))){
KillGLWindow();
MessageBox(NULL, "不能创建当前的opengl渲染描述表", "错误", MB_OK|MB_ICONEXCLAMATION);
return FALSE;
}
if (!wglMakeCurrent(hDC, hRC)){
KillGLWindow();
MessageBox(NULL, "不能激活当前的opengl渲染描述表", "错误", MB_OK);
return FALSE;
}
ShowWindow(hWnd, SW_SHOW);
SetForegroundWindow(hWnd);
SetFocus(hWnd);
ReSizeGLScene(width, height);
InitGL();
return TRUE;
}
LRESULT CALLBACK WindowProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam ){
switch(uMsg){
case WM_ACTIVATE:
{
if (!HIWORD(wParam))
active = TRUE;
else
active = FALSE;
return 0;
}
case WM_CLOSE:
{
PostQuitMessage(0);
return 0;
}
case WM_KEYUP:
{
keys[wParam] = FALSE;
return 0;
}
case WM_KEYDOWN:
{
keys[wParam] = TRUE;
return 0;
}
case WM_SIZE:
{
ReSizeGLScene(LOWORD(lParam), HIWORD(lParam));
return 0;
}
}
return DefWindowProc(hwnd, uMsg, wParam, lParam);
}
int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow ){
MSG msg;
BOOL done = FALSE;
if (MessageBox(NULL, "是否在全屏模式下运行?", "提示", MB_YESNO|MB_ICONEXCLAMATION) == IDYES)
fullscreen = TRUE;
if (!CreateGLWindow("Lesson 3", 640, 480, 16, hInstance, fullscreen))
return 0;
while (!done){
if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)){
if (msg.message == WM_QUIT)
done = TRUE;
else{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
else
{
if (active)
{
if (keys[VK_ESCAPE])
done = TRUE;
else{
DrawGLScene();
SwapBuffers(hDC);
}
if (keys[VK_F1]){
keys[VK_F1] = FALSE;
KillGLWindow();
fullscreen = !fullscreen;
if (!CreateGLWindow("Lesson 3", 640, 480, 16, hInstance, fullscreen))
return 0;
}
}
}
}
KillGLWindow();
return (msg.wParam);
}
![这里写图片描述](https://img-blog.csdn.net/20161025174608559)