glfw/src/win32/win32_window.c

//========================================================================
// GLFW - An OpenGL framework
// Platform:    Win32/WGL
// API version: 3.0
// WWW:         http://www.glfw.org/
//------------------------------------------------------------------------
// Copyright (c) 2002-2006 Marcus Geelnard
// Copyright (c) 2006-2010 Camilla Berglund <elmindreda@elmindreda.org>
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
//    claim that you wrote the original software. If you use this software
//    in a product, an acknowledgment in the product documentation would
//    be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not
//    be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
//    distribution.
//
//========================================================================

#include "internal.h"


// We use versioned window class names in order not to cause conflicts
// between applications using different versions of GLFW
#define _GLFW_WNDCLASSNAME "GLFW30"


//========================================================================
// Enable/disable minimize/restore animations
//========================================================================

static int setMinMaxAnimations(int enable)
{
    ANIMATIONINFO AI;
    int old_enable;

    // Get old animation setting
    AI.cbSize = sizeof(ANIMATIONINFO);
    SystemParametersInfo(SPI_GETANIMATION, AI.cbSize, &AI, 0);
    old_enable = AI.iMinAnimate;

    // If requested, change setting
    if (old_enable != enable)
    {
        AI.iMinAnimate = enable;
        SystemParametersInfo(SPI_SETANIMATION, AI.cbSize, &AI,
                             SPIF_SENDCHANGE);
    }

    return old_enable;
}


//========================================================================
// Focus the window and bring it to the top of the stack
// Due to some nastiness with how Win98/ME/2k/XP handles SetForegroundWindow,
// we have to go through some really bizarre measures to achieve this
//========================================================================

static void setForegroundWindow(HWND hWnd)
{
    int try_count = 0;
    int old_animate;

    // Try the standard approach first...
    BringWindowToTop(hWnd);
    SetForegroundWindow(hWnd);

    // If it worked, return now
    if (hWnd == GetForegroundWindow())
    {
        // Try to modify the system settings (since this is the foreground
        // process, we are allowed to do this)
        SystemParametersInfo(SPI_SETFOREGROUNDLOCKTIMEOUT, 0, (LPVOID) 0,
                             SPIF_SENDCHANGE);
        return;
    }

    // For other Windows versions than 95 & NT4.0, the standard approach
    // may not work, so if we failed we have to "trick" Windows into
    // making our window the foureground window: Iconify and restore
    // again. It is ugly, but it seems to work (we turn off those annoying
    // zoom animations to make it look a bit better at least).

    // Turn off minimize/restore animations
    old_animate = setMinMaxAnimations(0);

    // We try this a few times, just to be on the safe side of things...
    do
    {
        // Iconify & restore
        ShowWindow(hWnd, SW_HIDE);
        ShowWindow(hWnd, SW_SHOWMINIMIZED);
        ShowWindow(hWnd, SW_SHOWNORMAL);

        // Try to get focus
        BringWindowToTop(hWnd);
        SetForegroundWindow(hWnd);

        // We do not want to keep going on forever, so we keep track of
        // how many times we tried
        try_count++;
    }
    while (hWnd != GetForegroundWindow() && try_count <= 3);

    // Restore the system minimize/restore animation setting
    setMinMaxAnimations(old_animate);

    // Try to modify the system settings (since this is now hopefully the
    // foreground process, we are probably allowed to do this)
    SystemParametersInfo(SPI_SETFOREGROUNDLOCKTIMEOUT, 0, (LPVOID) 0,
                         SPIF_SENDCHANGE);
}


//========================================================================
// Returns the specified attribute of the specified pixel format
// NOTE: Do not call this unless we have found WGL_ARB_pixel_format
//========================================================================

static int getPixelFormatAttrib(_GLFWwindow* window, int pixelFormat, int attrib)
{
    int value = 0;

    if (!window->WGL.GetPixelFormatAttribivARB(window->WGL.DC, pixelFormat, 0, 1, &attrib, &value))
    {
        // NOTE: We should probably handle this error somehow
        return 0;
    }

    return value;
}


//========================================================================
// Return a list of available and usable framebuffer configs
//========================================================================

static _GLFWfbconfig* getFBConfigs(_GLFWwindow* window, unsigned int* found)
{
    _GLFWfbconfig* result;
    PIXELFORMATDESCRIPTOR pfd;
    int i, count;

    *found = 0;

    if (window->WGL.has_WGL_ARB_pixel_format)
        count = getPixelFormatAttrib(1, WGL_NUMBER_PIXEL_FORMATS_ARB);
    else
        count = _glfw_DescribePixelFormat(window->WGL.DC, 1, sizeof(PIXELFORMATDESCRIPTOR), NULL);

    if (!count)
    {
        fprintf(stderr, "No Win32 pixel formats available\n");
        return NULL;
    }

    result = (_GLFWfbconfig*) malloc(sizeof(_GLFWfbconfig) * count);
    if (!result)
    {
        fprintf(stderr, "Out of memory\n");
        return NULL;
    }

    for (i = 1;  i <= count;  i++)
    {
        if (window->WGL.has_WGL_ARB_pixel_format)
        {
            // Get pixel format attributes through WGL_ARB_pixel_format

            // Only consider doublebuffered OpenGL pixel formats for windows
            if (!getPixelFormatAttrib(i, WGL_SUPPORT_OPENGL_ARB) ||
                !getPixelFormatAttrib(i, WGL_DRAW_TO_WINDOW_ARB) ||
                !getPixelFormatAttrib(i, WGL_DOUBLE_BUFFER_ARB))
            {
                continue;
            }

            // Only consider RGBA pixel formats
            if (getPixelFormatAttrib(i, WGL_PIXEL_TYPE_ARB) != WGL_TYPE_RGBA_ARB)
                continue;

            result[*found].redBits = getPixelFormatAttrib(i, WGL_RED_BITS_ARB);
            result[*found].greenBits = getPixelFormatAttrib(i, WGL_GREEN_BITS_ARB);
            result[*found].blueBits = getPixelFormatAttrib(i, WGL_BLUE_BITS_ARB);
            result[*found].alphaBits = getPixelFormatAttrib(i, WGL_ALPHA_BITS_ARB);

            result[*found].depthBits = getPixelFormatAttrib(i, WGL_DEPTH_BITS_ARB);
            result[*found].stencilBits = getPixelFormatAttrib(i, WGL_STENCIL_BITS_ARB);

            result[*found].accumRedBits = getPixelFormatAttrib(i, WGL_ACCUM_RED_BITS_ARB);
            result[*found].accumGreenBits = getPixelFormatAttrib(i, WGL_ACCUM_GREEN_BITS_ARB);
            result[*found].accumBlueBits = getPixelFormatAttrib(i, WGL_ACCUM_BLUE_BITS_ARB);
            result[*found].accumAlphaBits = getPixelFormatAttrib(i, WGL_ACCUM_ALPHA_BITS_ARB);

            result[*found].auxBuffers = getPixelFormatAttrib(i, WGL_AUX_BUFFERS_ARB);
            result[*found].stereo = getPixelFormatAttrib(i, WGL_STEREO_ARB);

            if (window->WGL.has_WGL_ARB_multisample)
                result[*found].samples = getPixelFormatAttrib(i, WGL_SAMPLES_ARB);
            else
                result[*found].samples = 0;
        }
        else
        {
            // Get pixel format attributes through old-fashioned PFDs

            if (!_glfw_DescribePixelFormat(window->WGL.DC, i, sizeof(PIXELFORMATDESCRIPTOR), &pfd))
                continue;

            // Only consider doublebuffered OpenGL pixel formats for windows
            if (!(pfd.dwFlags & PFD_DRAW_TO_WINDOW) ||
                !(pfd.dwFlags & PFD_SUPPORT_OPENGL) ||
                !(pfd.dwFlags & PFD_DOUBLEBUFFER))
            {
                continue;
            }

            if (!(pfd.dwFlags & PFD_GENERIC_ACCELERATED) &&
                (pfd.dwFlags & PFD_GENERIC_FORMAT))
            {
                continue;
            }

            // Only RGBA pixel formats considered
            if (pfd.iPixelType != PFD_TYPE_RGBA)
                continue;

            result[*found].redBits = pfd.cRedBits;
            result[*found].greenBits = pfd.cGreenBits;
            result[*found].blueBits = pfd.cBlueBits;
            result[*found].alphaBits = pfd.cAlphaBits;

            result[*found].depthBits = pfd.cDepthBits;
            result[*found].stencilBits = pfd.cStencilBits;

            result[*found].accumRedBits = pfd.cAccumRedBits;
            result[*found].accumGreenBits = pfd.cAccumGreenBits;
            result[*found].accumBlueBits = pfd.cAccumBlueBits;
            result[*found].accumAlphaBits = pfd.cAccumAlphaBits;

            result[*found].auxBuffers = pfd.cAuxBuffers;
            result[*found].stereo = (pfd.dwFlags & PFD_STEREO) ? GL_TRUE : GL_FALSE;

            // PFD pixel formats do not support FSAA
            result[*found].samples = 0;
        }

        result[*found].platformID = i;

        (*found)++;
    }

    return result;
}


//========================================================================
// Creates an OpenGL context on the specified device context
//========================================================================

static HGLRC createContext(_GLFWwindow* window, const _GLFWwndconfig* wndconfig, int pixelFormat)
{
    PIXELFORMATDESCRIPTOR pfd;
    int flags, i = 0, attribs[7];

    if (!_glfw_DescribePixelFormat(dc, pixelFormat, sizeof(pfd), &pfd))
        return NULL;

    if (!_glfw_SetPixelFormat(dc, pixelFormat, &pfd))
        return NULL;

    if (window->WGL.has_WGL_ARB_create_context)
    {
        // Use the newer wglCreateContextAttribsARB

        if (wndconfig->glMajor != 1 || wndconfig->glMinor != 0)
        {
            // Request an explicitly versioned context

            attribs[i++] = WGL_CONTEXT_MAJOR_VERSION_ARB;
            attribs[i++] = wndconfig->glMajor;
            attribs[i++] = WGL_CONTEXT_MINOR_VERSION_ARB;
            attribs[i++] = wndconfig->glMinor;
        }

        if (wndconfig->glForward || wndconfig->glDebug)
        {
            flags = 0;

            if (wndconfig->glForward)
                flags |= WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;

            if (wndconfig->glDebug)
                flags |= WGL_CONTEXT_DEBUG_BIT_ARB;

            attribs[i++] = WGL_CONTEXT_FLAGS_ARB;
            attribs[i++] = flags;
        }

        if (wndconfig->glProfile)
        {
            if (wndconfig->glProfile == GLFW_OPENGL_CORE_PROFILE)
                flags = WGL_CONTEXT_CORE_PROFILE_BIT_ARB;
            else
                flags = WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB;

            attribs[i++] = WGL_CONTEXT_PROFILE_MASK_ARB;
            attribs[i++] = flags;
        }

        attribs[i++] = 0;

        return window->WGL.CreateContextAttribsARB(dc, NULL, attribs);
    }

    return wglCreateContext(dc);
}


//========================================================================
// Translates a Windows key to the corresponding GLFW key
//========================================================================

static int translateKey(WPARAM wParam, LPARAM lParam)
{
    MSG next_msg;
    DWORD msg_time;
    DWORD scan_code;

    // Check for numeric keypad keys
    // Note: This way we always force "NumLock = ON", which at least
    // enables GLFW users to detect numeric keypad keys
    int hiFlags = HIWORD(lParam);

    if (!(hiFlags & 0x100))
    {
        switch (MapVirtualKey(hiFlags & 0xFF, 1))
        {
            case VK_INSERT:   return GLFW_KEY_KP_0;
            case VK_END:      return GLFW_KEY_KP_1;
            case VK_DOWN:     return GLFW_KEY_KP_2;
            case VK_NEXT:     return GLFW_KEY_KP_3;
            case VK_LEFT:     return GLFW_KEY_KP_4;
            case VK_CLEAR:    return GLFW_KEY_KP_5;
            case VK_RIGHT:    return GLFW_KEY_KP_6;
            case VK_HOME:     return GLFW_KEY_KP_7;
            case VK_UP:       return GLFW_KEY_KP_8;
            case VK_PRIOR:    return GLFW_KEY_KP_9;
            case VK_DIVIDE:   return GLFW_KEY_KP_DIVIDE;
            case VK_MULTIPLY: return GLFW_KEY_KP_MULTIPLY;
            case VK_SUBTRACT: return GLFW_KEY_KP_SUBTRACT;
            case VK_ADD:      return GLFW_KEY_KP_ADD;
            case VK_DELETE:   return GLFW_KEY_KP_DECIMAL;
        }
    }

    // Check which key was pressed or released
    switch (wParam)
    {
        // The SHIFT keys require special handling
        case VK_SHIFT:
        {
            // Compare scan code for this key with that of VK_RSHIFT in
            // order to determine which shift key was pressed (left or
            // right)
            scan_code = MapVirtualKey(VK_RSHIFT, 0);
            if (((lParam & 0x01ff0000) >> 16) == scan_code)
                return GLFW_KEY_RSHIFT;

            return GLFW_KEY_LSHIFT;
        }

        // The CTRL keys require special handling
        case VK_CONTROL:
        {
            // Is this an extended key (i.e. right key)?
            if (lParam & 0x01000000)
                return GLFW_KEY_RCTRL;

            // Here is a trick: "Alt Gr" sends LCTRL, then RALT. We only
            // want the RALT message, so we try to see if the next message
            // is a RALT message. In that case, this is a false LCTRL!
            msg_time = GetMessageTime();
            if (PeekMessage(&next_msg, NULL, 0, 0, PM_NOREMOVE))
            {
                if (next_msg.message == WM_KEYDOWN ||
                    next_msg.message == WM_SYSKEYDOWN)
                {
                    if (next_msg.wParam == VK_MENU &&
                        (next_msg.lParam & 0x01000000) &&
                        next_msg.time == msg_time)
                    {
                        // Next message is a RALT down message, which
                        // means that this is NOT a proper LCTRL message!
                        return GLFW_KEY_UNKNOWN;
                    }
                }
            }

            return GLFW_KEY_LCTRL;
        }

        // The ALT keys require special handling
        case VK_MENU:
        {
            // Is this an extended key (i.e. right key)?
            if (lParam & 0x01000000)
                return GLFW_KEY_RALT;

            return GLFW_KEY_LALT;
        }

        // The ENTER keys require special handling
        case VK_RETURN:
        {
            // Is this an extended key (i.e. right key)?
            if (lParam & 0x01000000)
                return GLFW_KEY_KP_ENTER;

            return GLFW_KEY_ENTER;
        }

        // Special keys (non character keys)
        case VK_ESCAPE:        return GLFW_KEY_ESC;
        case VK_TAB:           return GLFW_KEY_TAB;
        case VK_BACK:          return GLFW_KEY_BACKSPACE;
        case VK_HOME:          return GLFW_KEY_HOME;
        case VK_END:           return GLFW_KEY_END;
        case VK_PRIOR:         return GLFW_KEY_PAGEUP;
        case VK_NEXT:          return GLFW_KEY_PAGEDOWN;
        case VK_INSERT:        return GLFW_KEY_INSERT;
        case VK_DELETE:        return GLFW_KEY_DEL;
        case VK_LEFT:          return GLFW_KEY_LEFT;
        case VK_UP:            return GLFW_KEY_UP;
        case VK_RIGHT:         return GLFW_KEY_RIGHT;
        case VK_DOWN:          return GLFW_KEY_DOWN;
        case VK_F1:            return GLFW_KEY_F1;
        case VK_F2:            return GLFW_KEY_F2;
        case VK_F3:            return GLFW_KEY_F3;
        case VK_F4:            return GLFW_KEY_F4;
        case VK_F5:            return GLFW_KEY_F5;
        case VK_F6:            return GLFW_KEY_F6;
        case VK_F7:            return GLFW_KEY_F7;
        case VK_F8:            return GLFW_KEY_F8;
        case VK_F9:            return GLFW_KEY_F9;
        case VK_F10:           return GLFW_KEY_F10;
        case VK_F11:           return GLFW_KEY_F11;
        case VK_F12:           return GLFW_KEY_F12;
        case VK_F13:           return GLFW_KEY_F13;
        case VK_F14:           return GLFW_KEY_F14;
        case VK_F15:           return GLFW_KEY_F15;
        case VK_F16:           return GLFW_KEY_F16;
        case VK_F17:           return GLFW_KEY_F17;
        case VK_F18:           return GLFW_KEY_F18;
        case VK_F19:           return GLFW_KEY_F19;
        case VK_F20:           return GLFW_KEY_F20;
        case VK_F21:           return GLFW_KEY_F21;
        case VK_F22:           return GLFW_KEY_F22;
        case VK_F23:           return GLFW_KEY_F23;
        case VK_F24:           return GLFW_KEY_F24;
        case VK_SPACE:         return GLFW_KEY_SPACE;

        // Numeric keypad
        case VK_NUMPAD0:       return GLFW_KEY_KP_0;
        case VK_NUMPAD1:       return GLFW_KEY_KP_1;
        case VK_NUMPAD2:       return GLFW_KEY_KP_2;
        case VK_NUMPAD3:       return GLFW_KEY_KP_3;
        case VK_NUMPAD4:       return GLFW_KEY_KP_4;
        case VK_NUMPAD5:       return GLFW_KEY_KP_5;
        case VK_NUMPAD6:       return GLFW_KEY_KP_6;
        case VK_NUMPAD7:       return GLFW_KEY_KP_7;
        case VK_NUMPAD8:       return GLFW_KEY_KP_8;
        case VK_NUMPAD9:       return GLFW_KEY_KP_9;
        case VK_DIVIDE:        return GLFW_KEY_KP_DIVIDE;
        case VK_MULTIPLY:      return GLFW_KEY_KP_MULTIPLY;
        case VK_SUBTRACT:      return GLFW_KEY_KP_SUBTRACT;
        case VK_ADD:           return GLFW_KEY_KP_ADD;
        case VK_DECIMAL:       return GLFW_KEY_KP_DECIMAL;
        case VK_NUMLOCK:       return GLFW_KEY_KP_NUM_LOCK;

        case VK_CAPITAL:       return GLFW_KEY_CAPS_LOCK;
        case VK_SCROLL:        return GLFW_KEY_SCROLL_LOCK;
        case VK_PAUSE:         return GLFW_KEY_PAUSE;

        case VK_LWIN:          return GLFW_KEY_LSUPER;
        case VK_RWIN:          return GLFW_KEY_RSUPER;
        case VK_APPS:          return GLFW_KEY_MENU;

        // The rest (should be printable keys)
        default:
        {
            // Convert to printable character (ISO-8859-1 or Unicode)
            wParam = MapVirtualKey((UINT) wParam, 2) & 0x0000FFFF;

            // Make sure that the character is uppercase
            if (_glfwLibrary.Sys.hasUnicode)
                wParam = (WPARAM) CharUpperW((LPWSTR) wParam);
            else
                wParam = (WPARAM) CharUpperA((LPSTR) wParam);

            // Valid ISO-8859-1 character?
            if ((wParam >=  32 && wParam <= 126) ||
                (wParam >= 160 && wParam <= 255))
            {
                return (int) wParam;
            }

            return GLFW_KEY_UNKNOWN;
        }
    }
}


//========================================================================
// Translates a Windows key to Unicode
//========================================================================

static void translateChar(DWORD wParam, DWORD lParam, int action)
{
    BYTE keyboard_state[256];
    UCHAR char_buf[10];
    WCHAR unicode_buf[10];
    UINT scan_code;
    int i, num_chars, unicode;

    GetKeyboardState(keyboard_state);

    // Derive scan code from lParam and action
    scan_code = (lParam & 0x01ff0000) >> 16;
    if (action == GLFW_RELEASE)
    {
        scan_code |= 0x8000000;
    }

    if (_glfwLibrary.Sys.hasUnicode)
    {
        num_chars = ToUnicode(
            wParam,          // virtual-key code
            scan_code,       // scan code
            keyboard_state,  // key-state array
            unicode_buf,     // buffer for translated key
            10,              // size of translated key buffer
            0                // active-menu flag
        );
        unicode = 1;
    }
    else
    {
        // Convert to ISO-8859-1
        num_chars = ToAscii(
            wParam,            // virtual-key code
            scan_code,         // scan code
            keyboard_state,    // key-state array
            (LPWORD) char_buf, // buffer for translated key
            0                  // active-menu flag
        );
        unicode = 0;
    }

    // Report characters
    for (i = 0;  i < num_chars;  i++)
    {
        // Get next character from buffer
        if (unicode)
            _glfwInputChar((int) unicode_buf[i], action);
        else
            _glfwInputChar((int) char_buf[i], action);
    }
}


//========================================================================
// Window callback function (handles window events)
//========================================================================

static LRESULT CALLBACK windowProc(HWND hWnd, UINT uMsg,
                                   WPARAM wParam, LPARAM lParam)
{
    int wheelDelta, iconified;

    _GLFWwindow* window = (_GLFWwindow*) GetWindowLongPtr(hWnd, 0);

    switch (uMsg)
    {
        // Window activate message? (iconification?)
        case WM_ACTIVATE:
        {
            if (LOWORD(wParam) != WA_INACTIVE)
                _glfwLibrary.activeWindow = window;

            iconified = HIWORD(wParam) ? GL_TRUE : GL_FALSE;

            // Were we deactivated/iconified?
            if ((window != _glfwLibrary.activeWindow || iconified) && !window->iconified)
            {
                _glfwInputDeactivation();

                // If we are in fullscreen mode we need to iconify
                if (window->mode == GLFW_FULLSCREEN)
                {
                    // Do we need to manually iconify?
                    if (!iconified)
                    {
                        // Minimize window
                        CloseWindow(window->Win32.handle);
                        iconified = GL_TRUE;
                    }

                    // Restore the original desktop resolution
                    ChangeDisplaySettings(NULL, CDS_FULLSCREEN);
                }

                // Unlock mouse if locked
                if (!window->Win32.oldMouseLockValid)
                {
                    window->Win32.oldMouseLock = window->mouseLock;
                    window->Win32.oldMouseLockValid = GL_TRUE;
                    glfwEnable(GLFW_MOUSE_CURSOR);
                }
            }
            else if (window == _glfwLibrary.activeWindow || !iconified)
            {
                // If we are in fullscreen mode we need to maximize
                if (window->mode == GLFW_FULLSCREEN && window->iconified)
                {
                    // Change display settings to the user selected mode
                    _glfwSetVideoModeMODE(window->Win32.modeID);

                    // Do we need to manually restore window?
                    if (iconified)
                    {
                        // Restore window
                        OpenIcon(window->Win32.handle);
                        iconified = GL_FALSE;

                        // Activate window
                        ShowWindow(hWnd, SW_SHOW);
                        setForegroundWindow(window->Win32.handle);
                        SetFocus(window->Win32.handle);
                    }
                }

                // Lock mouse, if necessary
                if (window->Win32.oldMouseLockValid && window->Win32.oldMouseLock)
                    glfwDisable(GLFW_MOUSE_CURSOR);

                window->Win32.oldMouseLockValid = GL_FALSE;
            }

            window->iconified = iconified;
            return 0;
        }

        case WM_SYSCOMMAND:
        {
            switch (wParam & 0xfff0)
            {
                case SC_SCREENSAVE:
                case SC_MONITORPOWER:
                {
                    if (window->mode == GLFW_FULLSCREEN)
                    {
                        // We are running in fullscreen mode, so disallow
                        // screen saver and screen blanking
                        return 0;
                    }
                    else
                        break;
                }

                // User trying to access application menu using ALT?
                case SC_KEYMENU:
                    return 0;
            }
            break;
        }

        case WM_CLOSE:
        {
            // Translate this to WM_QUIT so that we can handle all cases in the
            // same place
            PostQuitMessage(0);
            return 0;
        }

        case WM_KEYDOWN:
        case WM_SYSKEYDOWN:
        {
            _glfwInputKey(translateKey(wParam, lParam), GLFW_PRESS);

            if (window->charCallback)
                translateChar((DWORD) wParam, (DWORD) lParam, GLFW_PRESS);

            return 0;
          }

        case WM_KEYUP:
        case WM_SYSKEYUP:
        {
            // Special trick: release both shift keys on SHIFT up event
            if (wParam == VK_SHIFT)
            {
                _glfwInputKey(GLFW_KEY_LSHIFT, GLFW_RELEASE);
                _glfwInputKey(GLFW_KEY_RSHIFT, GLFW_RELEASE);
            }
            else
                _glfwInputKey(translateKey(wParam, lParam), GLFW_RELEASE);

            if (window->charCallback)
                translateChar((DWORD) wParam, (DWORD) lParam, GLFW_RELEASE);

            return 0;
        }

        case WM_LBUTTONDOWN:
        {
            SetCapture(hWnd);
            _glfwInputMouseClick(GLFW_MOUSE_BUTTON_LEFT, GLFW_PRESS);
            return 0;
        }

        case WM_RBUTTONDOWN:
        {
            SetCapture(hWnd);
            _glfwInputMouseClick(GLFW_MOUSE_BUTTON_RIGHT, GLFW_PRESS);
            return 0;
        }

        case WM_MBUTTONDOWN:
        {
            SetCapture(hWnd);
            _glfwInputMouseClick(GLFW_MOUSE_BUTTON_MIDDLE, GLFW_PRESS);
            return 0;
        }

        case WM_XBUTTONDOWN:
        {
            if (HIWORD(wParam) == XBUTTON1)
            {
                SetCapture(hWnd);
                _glfwInputMouseClick(GLFW_MOUSE_BUTTON_4, GLFW_PRESS);
            }
            else if (HIWORD(wParam) == XBUTTON2)
            {
                SetCapture(hWnd);
                _glfwInputMouseClick(GLFW_MOUSE_BUTTON_5, GLFW_PRESS);
            }

            return 1;
        }

        case WM_LBUTTONUP:
        {
            ReleaseCapture();
            _glfwInputMouseClick(GLFW_MOUSE_BUTTON_LEFT, GLFW_RELEASE);
            return 0;
        }

        case WM_RBUTTONUP:
        {
            ReleaseCapture();
            _glfwInputMouseClick(GLFW_MOUSE_BUTTON_RIGHT, GLFW_RELEASE);
            return 0;
        }

        case WM_MBUTTONUP:
        {
            ReleaseCapture();
            _glfwInputMouseClick(GLFW_MOUSE_BUTTON_MIDDLE, GLFW_RELEASE);
            return 0;
        }

        case WM_XBUTTONUP:
        {
            if (HIWORD(wParam) == XBUTTON1)
            {
                ReleaseCapture();
                _glfwInputMouseClick(GLFW_MOUSE_BUTTON_4, GLFW_RELEASE);
            }
            else if (HIWORD(wParam) == XBUTTON2)
            {
                ReleaseCapture();
                _glfwInputMouseClick(GLFW_MOUSE_BUTTON_5, GLFW_RELEASE);
            }

            return 1;
        }

        case WM_MOUSEMOVE:
        {
            int newMouseX, newMouseY;

            // Get signed (!) mouse position
            newMouseX = (int)((short)LOWORD(lParam));
            newMouseY = (int)((short)HIWORD(lParam));

            if (newMouseX != window->oldMouseX ||
                newMouseY != window->oldMouseY)
            {
                if (window == _glfwLibrary.cursorLockWindow)
                {
                    window->mousePosX += newMouseX -
                                         window->oldMouseX;
                    window->mousePosY += newMouseY -
                                         window->oldMouseY;
                }
                else
                {
                    window->mousePosX = newMouseX;
                    window->mousePosY = newMouseY;
                }

                window->oldMouseX = newMouseX;
                window->oldMouseY = newMouseY;
                window->mouseMoved = GL_TRUE;

                if (window->mousePosCallback)
                {
                    window->mousePosCallback(window->mousePosX,
                                             window->mousePosY);
                }
            }

            return 0;
        }

        case WM_MOUSEWHEEL:
        {
            wheelDelta = (((int)wParam) >> 16) / WHEEL_DELTA;
            window->wheelPos += wheelDelta;

            if (window->mouseWheelCallback)
                window->mouseWheelCallback(window->wheelPos);

            return 0;
        }

        case WM_SIZE:
        {
            window->width  = LOWORD(lParam);
            window->height = HIWORD(lParam);

            // If the mouse is locked, update the clipping rect
            if (_glfwWin.mouseLock)
            {
                RECT ClipWindowRect;
                if (GetWindowRect(window->Win32.handle, &ClipWindowRect))
                    ClipCursor(&ClipWindowRect);
            }

            if (window->windowSizeCallback)
                window->windowSizeCallback(LOWORD(lParam), HIWORD(lParam));

            return 0;
        }

        case WM_MOVE:
        {
            // If the mouse is locked, update the clipping rect
            if (_glfwWin.mouseLock)
            {
                RECT ClipWindowRect;
                if (GetWindowRect(window->Win32.handle, &ClipWindowRect))
                    ClipCursor(&ClipWindowRect);
            }
            return 0;
        }

        // Was the window contents damaged?
        case WM_PAINT:
        {
            if (window->Win32.handleRefreshCallback)
                window->Win32.handleRefreshCallback();

            break;
        }

        case WM_DISPLAYCHANGE:
        {
            // TODO: Do stuff here.

            break;
        }
    }

    // Pass all unhandled messages to DefWindowProc
    return DefWindowProc(hWnd, uMsg, wParam, lParam);
}


//========================================================================
// Translate client window size to full window size (including window borders)
//========================================================================

static void getFullWindowSize(_GLFWwindow* window,
                              int clientWidth, int clientHeight,
                              int* fullWidth, int* fullHeight)
{
    RECT rect;

    // Create a window rectangle
    rect.left   = (long) 0;
    rect.right  = (long) clientWidth - 1;
    rect.top    = (long) 0;
    rect.bottom = (long) clientHeight - 1;

    // Adjust according to window styles
    AdjustWindowRectEx(&rect, window->Win32.dwStyle, FALSE, window->Win32.dwExStyle);

    // Calculate width and height of full window
    *fullWidth = rect.right - rect.left + 1;
    *fullHeight = rect.bottom - rect.top + 1;
}


//========================================================================
// Initialize WGL-specific extensions
// This function is called once before initial context creation, i.e. before
// any WGL extensions could be present.  This is done in order to have both
// extension variable clearing and loading in the same place, hopefully
// decreasing the possibility of forgetting to add one without the other.
//========================================================================

static void initWGLExtensions(_GLFWwindow* window)
{
    // This needs to include every function pointer loaded below
    window->WGL.SwapIntervalEXT = NULL;
    window->WGL.GetPixelFormatAttribivARB = NULL;
    window->WGL.GetExtensionsStringARB = NULL;
    window->WGL.GetExtensionsStringEXT = NULL;
    window->WGL.CreateContextAttribsARB = NULL;

    // This needs to include every extension used below except for
    // WGL_ARB_extensions_string and WGL_EXT_extensions_string
    window->WGL.has_WGL_EXT_swap_control = GL_FALSE;
    window->WGL.has_WGL_ARB_pixel_format = GL_FALSE;
    window->WGL.has_WGL_ARB_multisample = GL_FALSE;
    window->WGL.has_WGL_ARB_create_context = GL_FALSE;

    window->WGL.GetExtensionsStringEXT = (WGLGETEXTENSIONSSTRINGEXT_T)
        wglGetProcAddress("wglGetExtensionsStringEXT");
    if (!window->WGL.GetExtensionsStringEXT)
    {
        window->WGL.GetExtensionsStringARB = (WGLGETEXTENSIONSSTRINGARB_T)
            wglGetProcAddress("wglGetExtensionsStringARB");
        if (!window->WGL.GetExtensionsStringARB)
            return;
    }

    if (_glfwPlatformExtensionSupported("WGL_ARB_multisample"))
        window->WGL.has_WGL_ARB_multisample = GL_TRUE;

    if (_glfwPlatformExtensionSupported("WGL_ARB_create_context"))
    {
        window->WGL.CreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC)
            wglGetProcAddress("wglCreateContextAttribsARB");

        if (window->WGL.CreateContextAttribsARB)
            window->WGL.has_WGL_ARB_create_context = GL_TRUE;
    }

    if (_glfwPlatformExtensionSupported("WGL_EXT_swap_control"))
    {
        window->WGL.SwapIntervalEXT = (WGLSWAPINTERVALEXT_T)
            wglGetProcAddress("wglSwapIntervalEXT");

        if (window->WGL.SwapIntervalEXT)
            window->WGL.has_WGL_EXT_swap_control = GL_TRUE;
    }

    if (_glfwPlatformExtensionSupported("WGL_ARB_pixel_format"))
    {
        window->WGL.GetPixelFormatAttribivARB = (WGLGETPIXELFORMATATTRIBIVARB_T)
            wglGetProcAddress("wglGetPixelFormatAttribivARB");

        if (window->WGL.GetPixelFormatAttribivARB)
            window->WGL.has_WGL_ARB_pixel_format = GL_TRUE;
    }
}


//========================================================================
// Registers the GLFW window class
//========================================================================

static ATOM registerWindowClass(void)
{
    WNDCLASS wc;

    // Set window class parameters
    wc.style         = CS_HREDRAW | CS_VREDRAW | CS_OWNDC; // Redraw on...
    wc.lpfnWndProc   = (WNDPROC) windowProc;          // Message handler
    wc.cbClsExtra    = 0;                             // No extra class data
    wc.cbWndExtra    = sizeof(void*) + sizeof(int);   // Make room for one pointer
    wc.hInstance     = _glfwLibrary.Win32.instance;   // Set instance
    wc.hCursor       = LoadCursor(NULL, IDC_ARROW);   // Load arrow pointer
    wc.hbrBackground = NULL;                          // No background
    wc.lpszMenuName  = NULL;                          // No menu
    wc.lpszClassName = _GLFW_WNDCLASSNAME;            // Set class name

    // Load user-provided icon if available
    wc.hIcon = LoadIcon(_glfwLibrary.Win32.instance, "GLFW_ICON");
    if (!wc.hIcon)
    {
        // Load default icon
        wc.hIcon = LoadIcon(NULL, IDI_WINLOGO);
    }

    return RegisterClass(&wc);
}


//========================================================================
// Returns the closest matching pixel format, or zero on error
//========================================================================

static int choosePixelFormat(const _GLFWfbconfig* fbconfig)
{
    unsigned int fbcount;
    int pixelFormat;
    _GLFWfbconfig* fbconfigs;
    const _GLFWfbconfig* closest;

    fbconfigs = getFBConfigs(&fbcount);
    if (!fbconfigs)
    {
        fprintf(stderr, "Failed to find any usable GLFWFBConfigs\n");
        return 0;
    }

    closest = _glfwChooseFBConfig(fbconfig, fbconfigs, fbcount);
    if (!closest)
    {
        fprintf(stderr, "Failed to select a GLFWFBConfig from the alternatives\n");
        free(fbconfigs);
        return 0;
    }

    pixelFormat = (int) closest->platformID;

    free(fbconfigs);
    fbconfigs = NULL;
    closest = NULL;

    return pixelFormat;
}


//========================================================================
// Creates the GLFW window and rendering context
//========================================================================

static int createWindow(_GLFWwindow* window,
                        const _GLFWwndconfig* wndconfig,
                        const _GLFWfbconfig* fbconfig)
{
    DWORD dwStyle, dwExStyle;
    int pixelFormat, fullWidth, fullHeight;
    RECT wa;
    POINT pos;

    window->WGL.DC = NULL;
    window->WGL.context = NULL;
    window->Win32.handle = NULL;

    // Set common window styles
    dwStyle = WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_VISIBLE;
    dwExStyle = WS_EX_APPWINDOW;

    // Set window style, depending on fullscreen mode
    if (window->mode == GLFW_FULLSCREEN)
    {
        dwStyle |= WS_POPUP;

        // Here's a trick for helping us getting window focus
        // (SetForegroundWindow doesn't work properly under
        // Win98/ME/2K/.NET/+)
        /*
        if (_glfwLibrary.Sys.WinVer != _GLFW_WIN_95 &&
            _glfwLibrary.Sys.WinVer != _GLFW_WIN_NT4 &&
            _glfwLibrary.Sys.WinVer != _GLFW_WIN_XP)
        {
            dwStyle |= WS_MINIMIZE;
        }
        */
    }
    else
    {
        dwStyle |= WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX;

        if (!wndconfig->windowNoResize)
        {
            dwStyle |= (WS_MAXIMIZEBOX | WS_SIZEBOX);
            dwExStyle |= WS_EX_WINDOWEDGE;
        }
    }

    // Remember window styles (used by getFullWindowSize)
    window->Win32.dwStyle   = dwStyle;
    window->Win32.dwExStyle = dwExStyle;

    // Adjust window size for frame and title bar
    getFullWindowSize(window->width, window->height, &fullWidth, &fullHeight);

    // Adjust window position to working area (e.g. if the task bar is at
    // the top of the display). Fullscreen windows are always opened in
    // the upper left corner regardless of the desktop working area.
    if (window->mode == GLFW_FULLSCREEN)
        wa.left = wa.top = 0;
    else
        SystemParametersInfo(SPI_GETWORKAREA, 0, &wa, 0);

    window->Win32.handle = CreateWindowEx(window->Win32.dwExStyle,
                                          _GLFW_WNDCLASSNAME,
                                          "GLFW Window",
                                          window->Win32.dwStyle,
                                          wa.left, wa.top,       // Window position
                                          fullWidth,             // Decorated window width
                                          fullHeight,            // Decorated window height
                                          NULL,                  // No parent window
                                          NULL,                  // No menu
                                          _glfwLibrary.Win32.instance,
                                          NULL);                 // No lParam to WM_CREATE

    if (!window->Win32.handle)
    {
        fprintf(stderr, "Unable to create Win32 window\n");
        return GL_FALSE;
    }

    window->WGL.DC = GetDC(window->Win32.handle);
    if (!window->WGL.DC)
    {
        fprintf(stderr, "Unable to retrieve GLFW window DC\n");
        return GL_FALSE;
    }

    pixelFormat = choosePixelFormat(fbconfig);
    if (!pixelFormat)
    {
        fprintf(stderr, "Unable to find a usable pixel format\n");
        return GL_FALSE;
    }

    window->WGL.context = createContext(window->WGL.DC, wndconfig, pixelFormat);
    if (!window->WGL.context)
    {
        fprintf(stderr, "Unable to create OpenGL context\n");
        return GL_FALSE;
    }

    if (!wglMakeCurrent(window->WGL.DC, window->WGL.context))
    {
        fprintf(stderr, "Unable to make OpenGL context current\n");
        return GL_FALSE;
    }

    initWGLExtensions();

    // Initialize mouse position data
    GetCursorPos(&pos);
    ScreenToClient(window->Win32.handle, &pos);
    window->oldMouseX = window->mousePosX = pos.x;
    window->oldMouseY = window->mousePosY = pos.y;

    return GL_TRUE;
}


//========================================================================
// Destroys the GLFW window and rendering context
//========================================================================

static void destroyWindow(void)
{
    if (window->WGL.context)
    {
        wglMakeCurrent(NULL, NULL);
        wglDeleteContext(window->WGL.context);
        window->WGL.context = NULL;
    }

    if (window->WGL.DC)
    {
        ReleaseDC(window->Win32.handle, window->WGL.DC);
        window->WGL.DC = NULL;
    }

    if (window->Win32.handle)
    {
        DestroyWindow(window->Win32.handle);
        window->Win32.handle = NULL;
    }
}


//////////////////////////////////////////////////////////////////////////
//////                       GLFW platform API                      //////
//////////////////////////////////////////////////////////////////////////

//========================================================================
// Here is where the window is created, and the OpenGL rendering context is
// created
//========================================================================

int _glfwPlatformOpenWindow(_GLFWwindow* window,
                            const _GLFWwndconfig* wndconfig,
                            const _GLFWfbconfig* fbconfig)
{
    GLboolean recreateContext = GL_FALSE;

    window->Win32.desiredRefreshRate = wndconfig->refreshRate;

    window->Win32.classAtom = registerWindowClass();
    if (!window->Win32.classAtom)
        return GL_FALSE;

    if (window->mode == GLFW_FULLSCREEN)
    {
        _glfwSetVideoMode(&window->width, &window->height,
                          fbconfig->redBits, fbconfig->greenBits, fbconfig->blueBits,
                          wndconfig->refreshRate);
    }

    initWGLExtensions();

    if (!createWindow(window, wndconfig, fbconfig))
        return GL_FALSE;

    if (wndconfig->glMajor > 2)
    {
        if (!window->WGL.has_WGL_ARB_create_context)
        {
            _glfwSetError(GLFW_UNAVAILABLE_VERSION);
            return GL_FALSE;
        }

        recreateContext = GL_TRUE;
    }

    if (fbconfig->samples > 0)
    {
        // We want FSAA, but can we get it?
        // FSAA is not a hard constraint, so otherwise we just don't care

        if (window->WGL.has_WGL_ARB_multisample && window->WGL.has_WGL_ARB_pixel_format)
        {
            // We appear to have both the FSAA extension and the means to ask for it
            recreateContext = GL_TRUE;
        }
    }

    if (recreateContext)
    {
        // Some window hints require us to re-create the context using WGL
        // extensions retrieved through the current context, as we cannot check
        // for WGL extensions or retrieve WGL entry points before we have a
        // current context (actually until we have implicitly loaded the ICD)

        // Yes, this is strange, and yes, this is the proper way on Win32

        // As Windows only allows you to set the pixel format once for a
        // window, we need to destroy the current window and create a new one
        // to be able to use the new pixel format

        // Technically, it may be possible to keep the old window around if
        // we're just creating an OpenGL 3.0+ context with the same pixel
        // format, but it's not worth the potential compatibility problems

        destroyWindow();

        if (!createWindow(window, wndconfig, fbconfig))
            return GL_FALSE;
    }

    if (window->mode == GLFW_FULLSCREEN)
    {
        // Place the window above all topmost windows
        SetWindowPos(window->Win32.handle, HWND_TOPMOST, 0,0,0,0,
                     SWP_NOMOVE | SWP_NOSIZE);
    }

    setForegroundWindow(window->Win32.handle);
    SetFocus(window->Win32.handle);

    return GL_TRUE;
}


//========================================================================
// Properly kill the window / video display
//========================================================================

void _glfwPlatformCloseWindow(_GLFWwindow* window)
{
    destroyWindow();

    if (window->Win32.classAtom)
    {
        UnregisterClass(_GLFW_WNDCLASSNAME, _glfwLibrary.Win32.instance);
        window->Win32.classAtom = 0;
    }

    if (window->mode == GLFW_FULLSCREEN)
    {
        // Restore original desktop resolution
        ChangeDisplaySettings(NULL, CDS_FULLSCREEN);
    }
}


//========================================================================
// Set the window title
//========================================================================

void _glfwPlatformSetWindowTitle(_GLFWwindow* window, const char* title)
{
    SetWindowText(window->Win32.handle, title);
}


//========================================================================
// Set the window size.
//========================================================================

void _glfwPlatformSetWindowSize(_GLFWwindow* window, int width, int height)
{
    int bpp, mode = 0, refresh;
    int sizechanged = GL_FALSE;
    GLint drawbuffer;
    GLfloat clearcolor[4];

    if (window->mode == GLFW_FULLSCREEN)
    {
        // Get some info about the current mode

        DEVMODE dm;

        // Get current BPP settings
        dm.dmSize = sizeof(DEVMODE);
        if (EnumDisplaySettings(NULL, _glfwWin.modeID, &dm))
        {
            // Get bpp
            bpp = dm.dmBitsPerPel;

            // Get closest match for target video mode
            refresh = window->Win32.desiredRefreshRate;
            mode = _glfwGetClosestVideoModeBPP(&width, &height, &bpp, &refresh);
        }
        else
            mode = window->Win32.modeID;
    }
    else
    {
        // If we are in windowed mode, adjust the window size to
        // compensate for window decorations
        getFullWindowSize(width, height, &width, &height);
    }

    // Change window size before changing fullscreen mode?
    if (window->mode == GLFW_FULLSCREEN && (width > window->width))
    {
        SetWindowPos(window->Win32.handle, HWND_TOP, 0, 0, width, height,
                     SWP_NOOWNERZORDER | SWP_NOMOVE | SWP_NOZORDER);
        sizechanged = GL_TRUE;
    }

    // Change fullscreen video mode?
    if (window->mode == GLFW_FULLSCREEN && mode != window->Win32.modeID)
        _glfwSetVideoModeMODE(mode);

    // Set window size (if not already changed)
    if (!sizechanged)
    {
        SetWindowPos(window->Win32.handle, HWND_TOP, 0, 0, width, height,
                     SWP_NOOWNERZORDER | SWP_NOMOVE | SWP_NOZORDER);
    }
}


//========================================================================
// Set the window position
//========================================================================

void _glfwPlatformSetWindowPos(_GLFWwindow* window, int x, int y)
{
    SetWindowPos(window->Win32.handle, HWND_TOP, x, y, 0, 0,
                 SWP_NOOWNERZORDER | SWP_NOSIZE | SWP_NOZORDER);
}


//========================================================================
// Window iconification
//========================================================================

void _glfwPlatformIconifyWindow(_GLFWwindow* window)
{
    // Iconify window
    CloseWindow(window->Win32.handle);
    window->iconified = GL_TRUE;

    // If we are in fullscreen mode we need to change video modes
    if (window->mode == GLFW_FULLSCREEN)
    {
        // Change display settings to the desktop resolution
        ChangeDisplaySettings(NULL, CDS_FULLSCREEN);
    }

    // Unlock mouse
    if (!window->Win32.oldMouseLockValid)
    {
        window->Win32.oldMouseLock = _glfwWin.mouseLock;
        window->Win32.oldMouseLockValid = GL_TRUE;
        glfwEnable(GLFW_MOUSE_CURSOR);
    }
}


//========================================================================
// Window un-iconification
//========================================================================

void _glfwPlatformRestoreWindow(_GLFWwindow* window)
{
    if (window->mode == GLFW_FULLSCREEN)
    {
        // Change display settings to the user selected mode
        _glfwSetVideoModeMODE(window->Win32.modeID);
    }

    // Un-iconify window
    OpenIcon(window->Win32.handle);

    // Make sure that our window ends up on top of things
    ShowWindow(window->Win32.handle, SW_SHOW);
    setForegroundWindow(window->Win32.handle);
    SetFocus(window->Win32.handle);

    // Window is no longer iconified
    window->iconified = GL_FALSE;

    // Lock mouse, if necessary
    if (window->Win32.oldMouseLockValid && window->Win32.oldMouseLock)
        glfwDisable(GLFW_MOUSE_CURSOR);

    window->Win32.oldMouseLockValid = GL_FALSE;
}


//========================================================================
// Swap buffers (double-buffering)
//========================================================================

void _glfwPlatformSwapBuffers(void)
{
    _GLFWwindow* window = _glfwLibrary.currentWindow;

    _glfw_SwapBuffers(window->WGL.DC);
}


//========================================================================
// Set double buffering swap interval
//========================================================================

void _glfwPlatformSwapInterval(int interval)
{
    _GLFWwindow* window = _glfwLibrary.currentWindow;

    if (window->WGL.has_WGL_EXT_swap_control)
        window->WGL.SwapIntervalEXT(interval);
}


//========================================================================
// Write back window parameters into GLFW window structure
//========================================================================

void _glfwPlatformRefreshWindowParams(void)
{
    PIXELFORMATDESCRIPTOR pfd;
    DEVMODE dm;
    int pixelFormat, mode;

    _GLFWwindow* window = _glfwLibrary.currentWindow;

    // Obtain a detailed description of current pixel format
    pixelFormat = _glfw_GetPixelFormat(window->WGL.DC);

    if (window->WGL.has_WGL_ARB_pixel_format)
    {
        if (getPixelFormatAttrib(pixelFormat, WGL_ACCELERATION_ARB) !=
            WGL_NO_ACCELERATION_ARB)
        {
            window->accelerated = GL_TRUE;
        }
        else
            window->accelerated = GL_FALSE;

        window->redBits = getPixelFormatAttrib(pixelFormat, WGL_RED_BITS_ARB);
        window->greenBits = getPixelFormatAttrib(pixelFormat, WGL_GREEN_BITS_ARB);
        window->blueBits = getPixelFormatAttrib(pixelFormat, WGL_BLUE_BITS_ARB);

        window->alphaBits = getPixelFormatAttrib(pixelFormat, WGL_ALPHA_BITS_ARB);
        window->depthBits = getPixelFormatAttrib(pixelFormat, WGL_DEPTH_BITS_ARB);
        window->stencilBits = getPixelFormatAttrib(pixelFormat, WGL_STENCIL_BITS_ARB);

        window->accumRedBits = getPixelFormatAttrib(pixelFormat, WGL_ACCUM_RED_BITS_ARB);
        window->accumGreenBits = getPixelFormatAttrib(pixelFormat, WGL_ACCUM_GREEN_BITS_ARB);
        window->accumBlueBits = getPixelFormatAttrib(pixelFormat, WGL_ACCUM_BLUE_BITS_ARB);
        window->accumAlphaBits = getPixelFormatAttrib(pixelFormat, WGL_ACCUM_ALPHA_BITS_ARB);

        window->auxBuffers = getPixelFormatAttrib(pixelFormat, WGL_AUX_BUFFERS_ARB);
        window->stereo = getPixelFormatAttrib(pixelFormat, WGL_STEREO_ARB) ? GL_TRUE : GL_FALSE;

        if (window->WGL.has_WGL_ARB_multisample)
        {
            window->samples = getPixelFormatAttrib(pixelFormat, WGL_SAMPLES_ARB);
            // Should we force 1 to 0 here for consistency, or keep 1 for transparency?
        }
        else
            window->samples = 0;
    }
    else
    {
        _glfw_DescribePixelFormat(window->WGL.DC, pixelFormat,
                                  sizeof(PIXELFORMATDESCRIPTOR), &pfd);

        // Is current OpenGL context accelerated?
        window->accelerated = (pfd.dwFlags & PFD_GENERIC_ACCELERATED) ||
                              !(pfd.dwFlags & PFD_GENERIC_FORMAT) ? 1 : 0;

        // "Standard" window parameters
        window->redBits        = pfd.cRedBits;
        window->greenBits      = pfd.cGreenBits;
        window->blueBits       = pfd.cBlueBits;
        window->alphaBits      = pfd.cAlphaBits;
        window->depthBits      = pfd.cDepthBits;
        window->stencilBits    = pfd.cStencilBits;
        window->accumRedBits   = pfd.cAccumRedBits;
        window->accumGreenBits = pfd.cAccumGreenBits;
        window->accumBlueBits  = pfd.cAccumBlueBits;
        window->accumAlphaBits = pfd.cAccumAlphaBits;
        window->auxBuffers     = pfd.cAuxBuffers;
        window->stereo         = (pfd.dwFlags & PFD_STEREO) ? GL_TRUE : GL_FALSE;

        // If we don't have WGL_ARB_pixel_format then we can't have created a
        // multisampling context, so it's safe to hardcode zero here
        window->samples = 0;
    }

    // Get refresh rate
    mode = (window->mode == GLFW_FULLSCREEN) ? window->Win32.modeID : ENUM_CURRENT_SETTINGS;
    dm.dmSize = sizeof(DEVMODE);

    if (EnumDisplaySettings(NULL, mode, &dm))
    {
        window->refreshRate = dm.dmDisplayFrequency;
        if (window->refreshRate <= 1)
            window->refreshRate = 0;
    }
    else
        window->refreshRate = 0;
}


//========================================================================
// Poll for new window and input events
//========================================================================

void _glfwPlatformPollEvents(void)
{
    MSG msg;
    int winclosed = GL_FALSE;

    // Flag: mouse was not moved (will be changed by _glfwGetNextEvent if
    // there was a mouse move event)
    window->mouseMoved = GL_FALSE;
    if (_glfwWin.mouseLock)
    {
        window->oldMouseX = _glfwWin.width/2;
        window->oldMouseY = _glfwWin.height/2;
    }
    else
    {
        window->oldMouseX = window->mousePosX;
        window->oldMouseY = window->mousePosY;
    }

    // Check for new window messages
    while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
    {
        switch (msg.message)
        {
            // QUIT-message (from close window)?
            case WM_QUIT:
            {
                winclosed = GL_TRUE;
                break;
            }

            // Ok, send it to the window message handler
            default:
            {
                DispatchMessage(&msg);
                break;
            }
        }
    }

    // LSHIFT/RSHIFT fixup (keys tend to "stick" without this fix)
    // This is the only async event handling in GLFW, but it solves some
    // nasty problems.
    // Caveat: Does not work under Win 9x/ME.
    if (_glfwLibrary.Sys.winVer >= _GLFW_WIN_NT4)
    {
        int lshift_down, rshift_down;

        // Get current state of left and right shift keys
        lshift_down = (GetAsyncKeyState(VK_LSHIFT) >> 15) & 1;
        rshift_down = (GetAsyncKeyState(VK_RSHIFT) >> 15) & 1;

        // See if this differs from our belief of what has happened
        // (we only have to check for lost key up events)
        if (!lshift_down && window->key[GLFW_KEY_LSHIFT] == 1)
            _glfwInputKey(GLFW_KEY_LSHIFT, GLFW_RELEASE);

        if (!rshift_down && window->key[GLFW_KEY_RSHIFT] == 1)
            _glfwInputKey(GLFW_KEY_RSHIFT, GLFW_RELEASE);
    }

    // Did we have mouse movement in locked cursor mode?
    if (window->mouseMoved && _glfwWin.mouseLock)
    {
        _glfwPlatformSetMouseCursorPos(window->width / 2,
                                       window->height / 2);
    }

    // Was there a window close request?
    if (winclosed && window->closeCallback)
    {
        // Check if the program wants us to close the window
        winclosed = window->closeCallback();
    }
    if (winclosed)
        glfwCloseWindow();
}


//========================================================================
// Wait for new window and input events
//========================================================================

void _glfwPlatformWaitEvents(void)
{
    WaitMessage();

    _glfwPlatformPollEvents();
}


//========================================================================
// Hide mouse cursor (lock it)
//========================================================================

void _glfwPlatformHideMouseCursor(_GLFWwindow* window)
{
    RECT ClipWindowRect;

    ShowCursor(FALSE);

    // Clip cursor to the window
    if (GetWindowRect(window->Win32.handle, &ClipWindowRect))
        ClipCursor(&ClipWindowRect);

    // Capture cursor to user window
    SetCapture(window->Win32.handle);
}


//========================================================================
// Show mouse cursor (unlock it)
//========================================================================

void _glfwPlatformShowMouseCursor(_GLFWwindow* window)
{
    // Un-capture cursor
    ReleaseCapture();

    // Release the cursor from the window
    ClipCursor(NULL);

    ShowCursor(TRUE);
}


//========================================================================
// Set physical mouse cursor position
//========================================================================

void _glfwPlatformSetMouseCursorPos(_GLFWwindow* window, int x, int y)
{
    POINT pos;

    // Convert client coordinates to screen coordinates
    pos.x = x;
    pos.y = y;
    ClientToScreen(window->Win32.handle, &pos);

    SetCursorPos(pos.x, pos.y);
}