[DO-981] qt package (!15)

Co-authored-by: aleksandr.vodyanov <aleksandr.vodyanov@avroid.tech>
Reviewed-on: https://git.avroid.tech/Conan/conan_build/pulls/15

recipes/opengl/all/test_package/win.cpp

@@ -0,0 +1,58 @@
+#include <windows.h>
+
+static LRESULT CALLBACK WndProc(HWND hwnd,
+    UINT uMsg, WPARAM wParam, LPARAM lParam)
+{
+    LRESULT res = 1;
+    switch (uMsg)
+    {
+    case WM_DESTROY:
+        ::PostQuitMessage (0);
+        break;
+    default:
+        res = ::DefWindowProc(hwnd, uMsg, wParam, lParam);
+    }
+    return res;
+}
+
+bool init_context()
+{
+    static const wchar_t * class_name = L"ConanOpenGL";
+    static const wchar_t * window_name = L"Conan OpenGL";
+    WNDCLASSEXW wc = {0};
+    wc.cbSize = sizeof(WNDCLASSEXW);
+    wc.style = CS_HREDRAW | CS_VREDRAW;
+    wc.lpfnWndProc = WndProc;
+    wc.hInstance = ::GetModuleHandle(NULL);
+    wc.hIcon = ::LoadIcon(0, IDI_APPLICATION);
+    wc.hCursor = ::LoadCursor(0, IDC_ARROW);
+    wc.hbrBackground = (HBRUSH) ::GetStockObject(WHITE_BRUSH);
+    wc.lpszClassName = class_name;
+    if (!::RegisterClassExW(&wc))
+        return false;
+    HWND hWnd = ::CreateWindowExW(0, class_name, window_name,
+        WS_OVERLAPPEDWINDOW, 0, 0, 0, 0, NULL, NULL, wc.hInstance, NULL);
+    if (!hWnd)
+        return false;
+    HDC hDC = ::GetDC(hWnd);
+    if (!hDC)
+        return false;
+    PIXELFORMATDESCRIPTOR pfd = {0};
+    pfd.nSize = sizeof(PIXELFORMATDESCRIPTOR);
+    pfd.nVersion = 1;
+    pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
+    pfd.iPixelType = PFD_TYPE_RGBA;
+    pfd.dwLayerMask = PFD_MAIN_PLANE;
+    pfd.cColorBits = 32;
+    pfd.cDepthBits = 16;
+    int pixel_format = ::ChoosePixelFormat(hDC, &pfd);
+    if(0 == pixel_format)
+        return false;
+    if (!::SetPixelFormat(hDC, pixel_format, &pfd))
+        return false;
+    HGLRC hGLRC = ::wglCreateContext(hDC);
+    if (!hGLRC)
+        return false;
+    ::wglMakeCurrent(hDC, hGLRC);
+    return true;
+}