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#include <Windows.h>
#include <windowsx.h>
#include <GL/GL.h>
#include <GL/GLU.h>
#pragma comment(lib, "OpenGL32.Lib")
#pragma comment(lib, "glu32.lib")
static float f = 0;
HANDLE hRotateThread = NULL;
void RotateQuad()
{
for(;;)
{
f += 0.1f;
Sleep(10);
}
}
void CALLBACK MainRenderProc()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
glRotatef(f, 0, 0, 1);
glBegin(GL_QUADS);
glVertex2f(-0.5f, -0.5f);
glVertex2f(0.5f, -0.5f);
glVertex2f(0.5f, 0.5f);
glVertex2f(-0.5f, 0.5f);
glEnd();
}
LRESULT CALLBACK GlWndProc(HWND hWnd,
UINT message,
WPARAM wParam,
LPARAM lParam)
{
static HDC hDC = NULL;
static HGLRC hRC = NULL;
switch(message)
{
case WM_CREATE:
{
PIXELFORMATDESCRIPTOR pfd = {0};
OSVERSIONINFO osvi = {0};
pfd.nSize = sizeof(pfd);
pfd.nVersion = 1;
pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
pfd.iPixelType = PFD_TYPE_RGBA;
pfd.cColorBits = 24;
pfd.cDepthBits = 16;
pfd.iLayerType = PFD_MAIN_PLANE;
osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
if(!GetVersionEx(&osvi))
{
return FALSE;
}
if(osvi.dwMajorVersion > 6 ||
(osvi.dwMajorVersion == 6 && osvi.dwMinorVersion >= 0))
{
pfd.dwFlags |= PFD_SUPPORT_COMPOSITION;
}
if(!(hDC = GetDC(hWnd)))
{
return FALSE;
}
int pixelFormat = 0;
if(!(pixelFormat = ChoosePixelFormat(hDC, &pfd)))
{
return FALSE;
}
if(!SetPixelFormat(hDC, pixelFormat, &pfd))
{
return FALSE;
}
if(!(hRC = wglCreateContext(hDC)))
{
return FALSE;
}
if(!wglMakeCurrent(hDC, hRC))
{
return FALSE;
}
glClearColor(0, 0, 0, 1);
glPointSize(5);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_LINE_SMOOTH);
glHint(GL_LINE_SMOOTH_HINT, GL_NICEST);
hRotateThread = CreateThread(NULL, 0,
(LPTHREAD_START_ROUTINE)RotateQuad,
NULL, 0, NULL);
break;
}
case WM_SIZE:
{
int width = GET_X_LPARAM(lParam);
int height = GET_Y_LPARAM(lParam);
if(height == 0)
{
height = 1;
}
wglMakeCurrent(hDC, hRC);
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
float aspectRatio = 0;
if(width > height)
{
aspectRatio = width / float(height);
gluOrtho2D(-aspectRatio, aspectRatio, 1, -1);
}
else
{
aspectRatio = height / float(width);
gluOrtho2D(-1, 1, aspectRatio, -aspectRatio);
}
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
wglMakeCurrent(NULL, NULL);
break;
}
case WM_MOUSEMOVE:
InvalidateRect(hWnd, NULL, TRUE);
UpdateWindow(hWnd);
break;
case WM_PAINT:
PAINTSTRUCT ps;
BeginPaint(hWnd,&ps);
wglMakeCurrent(hDC, hRC);
MainRenderProc();
SwapBuffers(hDC);
wglMakeCurrent(NULL, NULL);
EndPaint(hWnd,&ps);
break;
case WM_CLOSE:
TerminateThread(hRotateThread, 0),
DestroyWindow(hWnd);
break;
default:
return DefWindowProcW(hWnd, message, wParam, lParam);
}
return 0;
}
LRESULT CALLBACK MainWndProc(HWND hWnd,
UINT message,
WPARAM wParam,
LPARAM lParam)
{
static HWND hGlWnd = NULL;
switch(message)
{
case WM_CREATE:
{
WNDCLASSEXW wc;
wc.cbSize = sizeof(WNDCLASSEXW);
wc.style = CS_OWNDC;
wc.lpfnWndProc = GlWndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = 0;
wc.hIcon = LoadIconW(NULL, MAKEINTRESOURCEW(IDI_APPLICATION));
wc.hCursor = LoadCursorW(NULL, MAKEINTRESOURCEW(IDC_ARROW));
wc.hbrBackground = NULL;
wc.lpszMenuName = NULL;
wc.lpszClassName = L"GLWnd1";
wc.hIconSm = LoadIconW(NULL, MAKEINTRESOURCEW(IDI_APPLICATION));
RegisterClassExW(&wc);
RECT parentRect;
GetClientRect(hWnd, &parentRect);
hGlWnd = CreateWindowExW(0,
L"GLWnd1",
L"GLWnd1",
WS_CHILD,
0,
0,
parentRect.right - parentRect.left,
parentRect.bottom - parentRect.top,
hWnd,
NULL,
((LPCREATESTRUCTW)(lParam))->hInstance,
NULL);
ShowWindow(hGlWnd, SW_SHOWNORMAL);
break;
}
case WM_SIZE:
{
SetWindowPos(hGlWnd,
NULL,
GET_X_LPARAM(lParam) / 2,
0,
GET_X_LPARAM(lParam) / 2,
GET_Y_LPARAM(lParam) / 2,
SWP_NOZORDER |
SWP_NOREPOSITION);
SetWindowPos(hGlWnd,
NULL,
0,
0,
GET_X_LPARAM(lParam),
GET_Y_LPARAM(lParam),
SWP_NOZORDER |
SWP_NOREPOSITION);
InvalidateRect(hGlWnd, NULL, TRUE);
UpdateWindow(hGlWnd);
break;
}
case WM_CLOSE:
DestroyWindow(hWnd);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProcW(hWnd, message, wParam, lParam);
}
return 0;
}
int WINAPI WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nShowCmd)
{
WNDCLASSEXW wc;
wc.cbSize = sizeof(WNDCLASSEXW);
wc.style = CS_VREDRAW | CS_HREDRAW;
wc.lpfnWndProc = MainWndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = 0;
wc.hIcon = LoadIconW(NULL, MAKEINTRESOURCEW(IDI_APPLICATION));
wc.hCursor = LoadCursorW(NULL, MAKEINTRESOURCEW(IDC_ARROW));
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
wc.lpszMenuName = NULL;
wc.lpszClassName = L"TestApp1";
wc.hIconSm = LoadIconW(NULL, MAKEINTRESOURCEW(IDI_APPLICATION));
RegisterClassExW(&wc);
HWND hWnd = CreateWindowExW(WS_EX_COMPOSITED,
wc.lpszClassName,
L"TestApp1",
WS_OVERLAPPEDWINDOW |
WS_CLIPCHILDREN |
WS_CLIPSIBLINGS,
0,
0,
1280,
720,
NULL,
NULL,
hInstance,
NULL);
ShowWindow(hWnd, SW_SHOWNORMAL);
MSG msg = {0};
while(msg.message != WM_QUIT)
{
if(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
else
{
Sleep(1);
}
}
return msg.wParam;
}
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