Hi,
Sorry for my bad english iam german. Iam using Dev-C++.
I have written this code and the screen is black only! What is wrong??
#include <windows.h>
#include <gl/gl.h>
#include <gl/glaux.h>
#include <gl/glu.h>
LRESULT CALLBACK WndProc (HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
void InitOpenGL();
void ResizeOpenGL(int, int);
void EnableOpenGL(HWND hWnd, HDC *hDC, HGLRC *hRC);
void DisableOpenGL(HWND hWnd, HDC hDC, HGLRC hRC);
struct sets
{
bool Fullscreen;
int Width;
int Height;
int Bits;
bool Keys[256];
};
sets Settings = {true, 800, 600, 16};
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int iCmdShow)
{
WNDCLASS wc;
HWND hWnd;
HDC hDC;
HGLRC hRC;
MSG msg;
BOOL bQuit = false;
wc.style = CS_OWNDC;
wc.lpfnWndProc = WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
wc.lpszMenuName = NULL;
wc.lpszClassName = "GLSample";
RegisterClass(&wc);
DWORD style;
if(Settings.Fullscreen)
{
style = WS_VISIBLE | WS_POPUP;
DEVMODE dmScreenSettings;
memset(&dmScreenSettings,0,sizeof(dmScreenSettings));
dmScreenSettings.dmSize=sizeof(dmScreenSettings);
dmScreenSettings.dmPelsWidth= Settings.Width;
dmScreenSettings.dmPelsHeight= Settings.Height;
dmScreenSettings.dmBitsPerPel= Settings.Bits;
dmScreenSettings.dmFields=DM_BITSPERPEL|DM_PELSWIDTH|DM_PELSHEIGHT;
if(ChangeDisplaySettings(&dmScreenSettings,CDS_FULLSCREEN) != DISP_CHANGE_SUCCESSFUL)
return 0;
}
else
style = WS_VISIBLE | WS_OVERLAPPEDWINDOW;
hWnd = CreateWindow(
"GLSample",
"Title",
style,
0, 0,
Settings.Width, Settings.Height,
NULL, NULL, hInstance, NULL);
EnableOpenGL(hWnd, &hDC, &hRC);
ResizeOpenGL(Settings.Width,Settings.Height);
InitOpenGL();
while(!bQuit)
{
if(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
{
if(msg.message == WM_QUIT)
{
bQuit = TRUE;
}
else
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
else
{
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClear(GL_COLOR_BUFFER_BIT);
glBegin(GL_LINES);
glColor3f( 1.0f, 0.0f, 0.0f); glVertex3f( 0.0f, 0.0f, 0.0f);
glColor3f( 1.0f, 0.0f, 0.0f); glVertex3f(-2.0f, 0.0f, 0.0f);
glEnd();
SwapBuffers( hDC );
}
}
DisableOpenGL(hWnd, hDC, hRC);
DestroyWindow(hWnd);
return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch(message)
{
case WM_CREATE:
return 0;
case WM_CLOSE:
PostQuitMessage(0);
return 0;
case WM_DESTROY:
return 0;
case WM_SIZE:
ResizeOpenGL(LOWORD(lParam),HIWORD(lParam));
return 0;
case WM_KEYUP:
Settings.Keys[wParam] = false;
return 0;
case WM_KEYDOWN:
Settings.Keys[wParam] = true;
switch(wParam)
{
case VK_ESCAPE:
PostQuitMessage(0);
return 0;
}
return 0;
default:
return DefWindowProc (hWnd, message, wParam, lParam);
}
}
void EnableOpenGL(HWND hWnd, HDC *hDC, HGLRC *hRC)
{
PIXELFORMATDESCRIPTOR pfd;
int iFormat;
*hDC = GetDC(hWnd);
ZeroMemory (&pfd, sizeof (pfd));
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 = Settings.Bits;
pfd.cDepthBits = 16;
pfd.iLayerType = PFD_MAIN_PLANE;
iFormat = ChoosePixelFormat (*hDC, &pfd);
SetPixelFormat (*hDC, iFormat, &pfd);
*hRC = wglCreateContext( *hDC );
wglMakeCurrent( *hDC, *hRC );
}
void DisableOpenGL(HWND hWnd, HDC hDC, HGLRC hRC)
{
if(Settings.Fullscreen)
ChangeDisplaySettings(NULL,0);
wglMakeCurrent (NULL, NULL);
wglDeleteContext (hRC);
ReleaseDC (hWnd, hDC);
}
void ResizeOpenGL(int width, int height)
{
glViewport(0, 0, width, (height==0) ? 1 : height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(60.0, (float)width/(float)height, 1,100);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
void InitOpenGL()
{
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);
}