1 files changed, 146 insertions, 0 deletions
diff --git a/src/plugins/platforms/windows/qwindowsopengltester.cpp b/src/plugins/platforms/windows/qwindowsopengltester.cpp
new file mode 100644
index 0000000000..9ee62e6d56
--- /dev/null
+++ b/src/plugins/platforms/windows/qwindowsopengltester.cpp
@@ -0,0 +1,146 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qwindowsopengltester.h"
+#include "qt_windows.h"
+#include "qwindowscontext.h"
+
+QT_BEGIN_NAMESPACE
+
+bool QWindowsOpenGLTester::testDesktopGL()
+{
+    HMODULE lib = 0;
+    HWND wnd = 0;
+    HDC dc = 0;
+    HGLRC context = 0;
+    LPCTSTR className = L"qtopengltest";
+
+    HGLRC (WINAPI * CreateContext)(HDC dc) = 0;
+    BOOL (WINAPI * DeleteContext)(HGLRC context) = 0;
+    BOOL (WINAPI * MakeCurrent)(HDC dc, HGLRC context) = 0;
+    PROC (WINAPI * WGL_GetProcAddress)(LPCSTR name) = 0;
+
+    bool result = false;
+
+    // Test #1: Load opengl32.dll and try to resolve an OpenGL 2 function.
+    // This will typically fail on systems that do not have a real OpenGL driver.
+    lib = LoadLibraryA("opengl32.dll");
+    if (lib) {
+        CreateContext = reinterpret_cast<HGLRC (WINAPI *)(HDC)>(::GetProcAddress(lib, "wglCreateContext"));
+        if (!CreateContext)
+            goto cleanup;
+        DeleteContext = reinterpret_cast<BOOL (WINAPI *)(HGLRC)>(::GetProcAddress(lib, "wglDeleteContext"));
+        if (!DeleteContext)
+            goto cleanup;
+        MakeCurrent = reinterpret_cast<BOOL (WINAPI *)(HDC, HGLRC)>(::GetProcAddress(lib, "wglMakeCurrent"));
+        if (!MakeCurrent)
+            goto cleanup;
+        WGL_GetProcAddress = reinterpret_cast<PROC (WINAPI *)(LPCSTR)>(::GetProcAddress(lib, "wglGetProcAddress"));
+        if (!WGL_GetProcAddress)
+            goto cleanup;
+
+        WNDCLASS wclass;
+        wclass.cbClsExtra = 0;
+        wclass.cbWndExtra = 0;
+        wclass.hInstance = (HINSTANCE) GetModuleHandle(0);
+        wclass.hIcon = 0;
+        wclass.hCursor = 0;
+        wclass.hbrBackground = (HBRUSH) (COLOR_BACKGROUND);
+        wclass.lpszMenuName = 0;
+        wclass.lpfnWndProc = DefWindowProc;
+        wclass.lpszClassName = className;
+        wclass.style = CS_OWNDC;
+        if (!RegisterClass(&wclass))
+            goto cleanup;
+        wnd = CreateWindow(className, L"qtopenglproxytest", WS_OVERLAPPED,
+                           0, 0, 640, 480, 0, 0, wclass.hInstance, 0);
+        if (!wnd)
+            goto cleanup;
+        dc = GetDC(wnd);
+        if (!dc)
+            goto cleanup;
+
+        PIXELFORMATDESCRIPTOR pfd;
+        memset(&pfd, 0, sizeof(PIXELFORMATDESCRIPTOR));
+        pfd.nSize = sizeof(PIXELFORMATDESCRIPTOR);
+        pfd.nVersion = 1;
+        pfd.dwFlags = PFD_SUPPORT_OPENGL | PFD_DRAW_TO_WINDOW | PFD_GENERIC_FORMAT;
+        pfd.iPixelType = PFD_TYPE_RGBA;
+        // Use the GDI functions. Under the hood this will call the wgl variants in opengl32.dll.
+        int pixelFormat = ChoosePixelFormat(dc, &pfd);
+        if (!pixelFormat)
+            goto cleanup;
+        if (!SetPixelFormat(dc, pixelFormat, &pfd))
+            goto cleanup;
+        context = CreateContext(dc);
+        if (!context)
+            goto cleanup;
+        if (!MakeCurrent(dc, context))
+            goto cleanup;
+
+        // Now that there is finally a context current, try doing something useful.
+        if (WGL_GetProcAddress("glCreateShader")) {
+            result = true;
+            qCDebug(lcQpaGl, "OpenGL 2.0 entry points available");
+        } else {
+            qCDebug(lcQpaGl, "OpenGL 2.0 entry points not found");
+        }
+    } else {
+        qCDebug(lcQpaGl, "Failed to load opengl32.dll");
+    }
+
+cleanup:
+    if (MakeCurrent)
+        MakeCurrent(0, 0);
+    if (context)
+        DeleteContext(context);
+    if (dc && wnd)
+        ReleaseDC(wnd, dc);
+    if (wnd) {
+        DestroyWindow(wnd);
+        UnregisterClass(className, GetModuleHandle(0));
+    }
+    // No FreeLibrary. Some implementations, Mesa in particular, deadlock when trying to unload.
+
+    return result;
+}
+
+QT_END_NAMESPACE