Vous devez créer OpenGL Contexte (GTL) avant d'appeler glGetString (GL_VERSION):
#include <windows.h>
#include <GL/GL.h>
#pragma comment (lib, "opengl32.lib")
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
int WinMain(__in HINSTANCE hInstance, __in_opt HINSTANCE hPrevInstance, __in_opt LPSTR lpCmdLine, __in int nShowCmd)
{
MSG msg = {0};
WNDCLASS wc = {0};
wc.lpfnWndProc = WndProc;
wc.hInstance = hInstance;
wc.hbrBackground = (HBRUSH)(COLOR_BACKGROUND);
wc.lpszClassName = L"oglversionchecksample";
wc.style = CS_OWNDC;
if(!RegisterClass(&wc))
return 1;
CreateWindowW(wc.lpszClassName,L"openglversioncheck",WS_OVERLAPPEDWINDOW|WS_VISIBLE,0,0,640,480,0,0,hInstance,0);
while(GetMessage(&msg, NULL, 0, 0) > 0)
DispatchMessage(&msg);
return 0;
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch(message)
{
case WM_CREATE:
{
PIXELFORMATDESCRIPTOR pfd =
{
sizeof(PIXELFORMATDESCRIPTOR),
1,
PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER, //Flags
PFD_TYPE_RGBA, //The kind of framebuffer. RGBA or palette.
32, //Colordepth of the framebuffer.
0, 0, 0, 0, 0, 0,
0,
0,
0,
0, 0, 0, 0,
24, //Number of bits for the depthbuffer
8, //Number of bits for the stencilbuffer
0, //Number of Aux buffers in the framebuffer.
PFD_MAIN_PLANE,
0,
0, 0, 0
};
HDC ourWindowHandleToDeviceContext = GetDC(hWnd);
int letWindowsChooseThisPixelFormat;
letWindowsChooseThisPixelFormat = ChoosePixelFormat(ourWindowHandleToDeviceContext, &pfd);
SetPixelFormat(ourWindowHandleToDeviceContext,letWindowsChooseThisPixelFormat, &pfd);
HGLRC ourOpenGLRenderingContext = wglCreateContext(ourWindowHandleToDeviceContext);
wglMakeCurrent (ourWindowHandleToDeviceContext, ourOpenGLRenderingContext);
MessageBoxA(0,(char*)glGetString(GL_VERSION), "OPENGL VERSION",0);
wglDeleteContext(ourOpenGLRenderingContext);
PostQuitMessage(0);
}
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}
@Kos: Je l'ai vu de nombreuses bases de code avec différentes approches sur la gestion du contexte. Je ne sais pas si le PO utilise un cadre ou non. Mais le principe de base s'applique toujours quel que soit le cadre (le cas échéant) utilisé. – Bahbar
True. :) +1 de moi. – Kos