Initial Commit

1 files changed, 833 insertions, 0 deletions

diff --git a/glfw-3.2.1/src/x11_init.c b/glfw-3.2.1/src/x11_init.c
new file mode 100644
index 0000000..f7a06c1
--- /dev/null
+++ b/glfw-3.2.1/src/x11_init.c
@@ -0,0 +1,833 @@
+//========================================================================
+// GLFW 3.2 X11 - www.glfw.org
+//------------------------------------------------------------------------
+// Copyright (c) 2002-2006 Marcus Geelnard
+// Copyright (c) 2006-2016 Camilla Berglund <elmindreda@glfw.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"
+
+#include <X11/Xresource.h>
+
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+#include <stdio.h>
+#include <locale.h>
+
+
+// Translate an X11 key code to a GLFW key code.
+//
+static int translateKeyCode(int scancode)
+{
+    int keySym;
+
+    // Valid key code range is  [8,255], according to the Xlib manual
+    if (scancode < 8 || scancode > 255)
+        return GLFW_KEY_UNKNOWN;
+
+    if (_glfw.x11.xkb.available)
+    {
+        // Try secondary keysym, for numeric keypad keys
+        // Note: This way we always force "NumLock = ON", which is intentional
+        // since the returned key code should correspond to a physical
+        // location.
+        keySym = XkbKeycodeToKeysym(_glfw.x11.display, scancode, 0, 1);
+        switch (keySym)
+        {
+            case XK_KP_0:           return GLFW_KEY_KP_0;
+            case XK_KP_1:           return GLFW_KEY_KP_1;
+            case XK_KP_2:           return GLFW_KEY_KP_2;
+            case XK_KP_3:           return GLFW_KEY_KP_3;
+            case XK_KP_4:           return GLFW_KEY_KP_4;
+            case XK_KP_5:           return GLFW_KEY_KP_5;
+            case XK_KP_6:           return GLFW_KEY_KP_6;
+            case XK_KP_7:           return GLFW_KEY_KP_7;
+            case XK_KP_8:           return GLFW_KEY_KP_8;
+            case XK_KP_9:           return GLFW_KEY_KP_9;
+            case XK_KP_Separator:
+            case XK_KP_Decimal:     return GLFW_KEY_KP_DECIMAL;
+            case XK_KP_Equal:       return GLFW_KEY_KP_EQUAL;
+            case XK_KP_Enter:       return GLFW_KEY_KP_ENTER;
+            default:                break;
+        }
+
+        // Now try primary keysym for function keys (non-printable keys)
+        // These should not depend on the current keyboard layout
+        keySym = XkbKeycodeToKeysym(_glfw.x11.display, scancode, 0, 0);
+    }
+    else
+    {
+        int dummy;
+        KeySym* keySyms;
+
+        keySyms = XGetKeyboardMapping(_glfw.x11.display, scancode, 1, &dummy);
+        keySym = keySyms[0];
+        XFree(keySyms);
+    }
+
+    switch (keySym)
+    {
+        case XK_Escape:         return GLFW_KEY_ESCAPE;
+        case XK_Tab:            return GLFW_KEY_TAB;
+        case XK_Shift_L:        return GLFW_KEY_LEFT_SHIFT;
+        case XK_Shift_R:        return GLFW_KEY_RIGHT_SHIFT;
+        case XK_Control_L:      return GLFW_KEY_LEFT_CONTROL;
+        case XK_Control_R:      return GLFW_KEY_RIGHT_CONTROL;
+        case XK_Meta_L:
+        case XK_Alt_L:          return GLFW_KEY_LEFT_ALT;
+        case XK_Mode_switch: // Mapped to Alt_R on many keyboards
+        case XK_ISO_Level3_Shift: // AltGr on at least some machines
+        case XK_Meta_R:
+        case XK_Alt_R:          return GLFW_KEY_RIGHT_ALT;
+        case XK_Super_L:        return GLFW_KEY_LEFT_SUPER;
+        case XK_Super_R:        return GLFW_KEY_RIGHT_SUPER;
+        case XK_Menu:           return GLFW_KEY_MENU;
+        case XK_Num_Lock:       return GLFW_KEY_NUM_LOCK;
+        case XK_Caps_Lock:      return GLFW_KEY_CAPS_LOCK;
+        case XK_Print:          return GLFW_KEY_PRINT_SCREEN;
+        case XK_Scroll_Lock:    return GLFW_KEY_SCROLL_LOCK;
+        case XK_Pause:          return GLFW_KEY_PAUSE;
+        case XK_Delete:         return GLFW_KEY_DELETE;
+        case XK_BackSpace:      return GLFW_KEY_BACKSPACE;
+        case XK_Return:         return GLFW_KEY_ENTER;
+        case XK_Home:           return GLFW_KEY_HOME;
+        case XK_End:            return GLFW_KEY_END;
+        case XK_Page_Up:        return GLFW_KEY_PAGE_UP;
+        case XK_Page_Down:      return GLFW_KEY_PAGE_DOWN;
+        case XK_Insert:         return GLFW_KEY_INSERT;
+        case XK_Left:           return GLFW_KEY_LEFT;
+        case XK_Right:          return GLFW_KEY_RIGHT;
+        case XK_Down:           return GLFW_KEY_DOWN;
+        case XK_Up:             return GLFW_KEY_UP;
+        case XK_F1:             return GLFW_KEY_F1;
+        case XK_F2:             return GLFW_KEY_F2;
+        case XK_F3:             return GLFW_KEY_F3;
+        case XK_F4:             return GLFW_KEY_F4;
+        case XK_F5:             return GLFW_KEY_F5;
+        case XK_F6:             return GLFW_KEY_F6;
+        case XK_F7:             return GLFW_KEY_F7;
+        case XK_F8:             return GLFW_KEY_F8;
+        case XK_F9:             return GLFW_KEY_F9;
+        case XK_F10:            return GLFW_KEY_F10;
+        case XK_F11:            return GLFW_KEY_F11;
+        case XK_F12:            return GLFW_KEY_F12;
+        case XK_F13:            return GLFW_KEY_F13;
+        case XK_F14:            return GLFW_KEY_F14;
+        case XK_F15:            return GLFW_KEY_F15;
+        case XK_F16:            return GLFW_KEY_F16;
+        case XK_F17:            return GLFW_KEY_F17;
+        case XK_F18:            return GLFW_KEY_F18;
+        case XK_F19:            return GLFW_KEY_F19;
+        case XK_F20:            return GLFW_KEY_F20;
+        case XK_F21:            return GLFW_KEY_F21;
+        case XK_F22:            return GLFW_KEY_F22;
+        case XK_F23:            return GLFW_KEY_F23;
+        case XK_F24:            return GLFW_KEY_F24;
+        case XK_F25:            return GLFW_KEY_F25;
+
+        // Numeric keypad
+        case XK_KP_Divide:      return GLFW_KEY_KP_DIVIDE;
+        case XK_KP_Multiply:    return GLFW_KEY_KP_MULTIPLY;
+        case XK_KP_Subtract:    return GLFW_KEY_KP_SUBTRACT;
+        case XK_KP_Add:         return GLFW_KEY_KP_ADD;
+
+        // These should have been detected in secondary keysym test above!
+        case XK_KP_Insert:      return GLFW_KEY_KP_0;
+        case XK_KP_End:         return GLFW_KEY_KP_1;
+        case XK_KP_Down:        return GLFW_KEY_KP_2;
+        case XK_KP_Page_Down:   return GLFW_KEY_KP_3;
+        case XK_KP_Left:        return GLFW_KEY_KP_4;
+        case XK_KP_Right:       return GLFW_KEY_KP_6;
+        case XK_KP_Home:        return GLFW_KEY_KP_7;
+        case XK_KP_Up:          return GLFW_KEY_KP_8;
+        case XK_KP_Page_Up:     return GLFW_KEY_KP_9;
+        case XK_KP_Delete:      return GLFW_KEY_KP_DECIMAL;
+        case XK_KP_Equal:       return GLFW_KEY_KP_EQUAL;
+        case XK_KP_Enter:       return GLFW_KEY_KP_ENTER;
+
+        // Last resort: Check for printable keys (should not happen if the XKB
+        // extension is available). This will give a layout dependent mapping
+        // (which is wrong, and we may miss some keys, especially on non-US
+        // keyboards), but it's better than nothing...
+        case XK_a:              return GLFW_KEY_A;
+        case XK_b:              return GLFW_KEY_B;
+        case XK_c:              return GLFW_KEY_C;
+        case XK_d:              return GLFW_KEY_D;
+        case XK_e:              return GLFW_KEY_E;
+        case XK_f:              return GLFW_KEY_F;
+        case XK_g:              return GLFW_KEY_G;
+        case XK_h:              return GLFW_KEY_H;
+        case XK_i:              return GLFW_KEY_I;
+        case XK_j:              return GLFW_KEY_J;
+        case XK_k:              return GLFW_KEY_K;
+        case XK_l:              return GLFW_KEY_L;
+        case XK_m:              return GLFW_KEY_M;
+        case XK_n:              return GLFW_KEY_N;
+        case XK_o:              return GLFW_KEY_O;
+        case XK_p:              return GLFW_KEY_P;
+        case XK_q:              return GLFW_KEY_Q;
+        case XK_r:              return GLFW_KEY_R;
+        case XK_s:              return GLFW_KEY_S;
+        case XK_t:              return GLFW_KEY_T;
+        case XK_u:              return GLFW_KEY_U;
+        case XK_v:              return GLFW_KEY_V;
+        case XK_w:              return GLFW_KEY_W;
+        case XK_x:              return GLFW_KEY_X;
+        case XK_y:              return GLFW_KEY_Y;
+        case XK_z:              return GLFW_KEY_Z;
+        case XK_1:              return GLFW_KEY_1;
+        case XK_2:              return GLFW_KEY_2;
+        case XK_3:              return GLFW_KEY_3;
+        case XK_4:              return GLFW_KEY_4;
+        case XK_5:              return GLFW_KEY_5;
+        case XK_6:              return GLFW_KEY_6;
+        case XK_7:              return GLFW_KEY_7;
+        case XK_8:              return GLFW_KEY_8;
+        case XK_9:              return GLFW_KEY_9;
+        case XK_0:              return GLFW_KEY_0;
+        case XK_space:          return GLFW_KEY_SPACE;
+        case XK_minus:          return GLFW_KEY_MINUS;
+        case XK_equal:          return GLFW_KEY_EQUAL;
+        case XK_bracketleft:    return GLFW_KEY_LEFT_BRACKET;
+        case XK_bracketright:   return GLFW_KEY_RIGHT_BRACKET;
+        case XK_backslash:      return GLFW_KEY_BACKSLASH;
+        case XK_semicolon:      return GLFW_KEY_SEMICOLON;
+        case XK_apostrophe:     return GLFW_KEY_APOSTROPHE;
+        case XK_grave:          return GLFW_KEY_GRAVE_ACCENT;
+        case XK_comma:          return GLFW_KEY_COMMA;
+        case XK_period:         return GLFW_KEY_PERIOD;
+        case XK_slash:          return GLFW_KEY_SLASH;
+        case XK_less:           return GLFW_KEY_WORLD_1; // At least in some layouts...
+        default:                break;
+    }
+
+    // No matching translation was found
+    return GLFW_KEY_UNKNOWN;
+}
+
+// Create key code translation tables
+//
+static void createKeyTables(void)
+{
+    int scancode, key;
+
+    memset(_glfw.x11.publicKeys, -1, sizeof(_glfw.x11.publicKeys));
+    memset(_glfw.x11.nativeKeys, -1, sizeof(_glfw.x11.nativeKeys));
+
+    if (_glfw.x11.xkb.available)
+    {
+        // Use XKB to determine physical key locations independently of the current
+        // keyboard layout
+
+        char name[XkbKeyNameLength + 1];
+        XkbDescPtr desc = XkbGetMap(_glfw.x11.display, 0, XkbUseCoreKbd);
+        XkbGetNames(_glfw.x11.display, XkbKeyNamesMask, desc);
+
+        // Find the X11 key code -> GLFW key code mapping
+        for (scancode = desc->min_key_code;  scancode <= desc->max_key_code;  scancode++)
+        {
+            memcpy(name, desc->names->keys[scancode].name, XkbKeyNameLength);
+            name[XkbKeyNameLength] = '\0';
+
+            // Map the key name to a GLFW key code. Note: We only map printable
+            // keys here, and we use the US keyboard layout. The rest of the
+            // keys (function keys) are mapped using traditional KeySym
+            // translations.
+            if (strcmp(name, "TLDE") == 0) key = GLFW_KEY_GRAVE_ACCENT;
+            else if (strcmp(name, "AE01") == 0) key = GLFW_KEY_1;
+            else if (strcmp(name, "AE02") == 0) key = GLFW_KEY_2;
+            else if (strcmp(name, "AE03") == 0) key = GLFW_KEY_3;
+            else if (strcmp(name, "AE04") == 0) key = GLFW_KEY_4;
+            else if (strcmp(name, "AE05") == 0) key = GLFW_KEY_5;
+            else if (strcmp(name, "AE06") == 0) key = GLFW_KEY_6;
+            else if (strcmp(name, "AE07") == 0) key = GLFW_KEY_7;
+            else if (strcmp(name, "AE08") == 0) key = GLFW_KEY_8;
+            else if (strcmp(name, "AE09") == 0) key = GLFW_KEY_9;
+            else if (strcmp(name, "AE10") == 0) key = GLFW_KEY_0;
+            else if (strcmp(name, "AE11") == 0) key = GLFW_KEY_MINUS;
+            else if (strcmp(name, "AE12") == 0) key = GLFW_KEY_EQUAL;
+            else if (strcmp(name, "AD01") == 0) key = GLFW_KEY_Q;
+            else if (strcmp(name, "AD02") == 0) key = GLFW_KEY_W;
+            else if (strcmp(name, "AD03") == 0) key = GLFW_KEY_E;
+            else if (strcmp(name, "AD04") == 0) key = GLFW_KEY_R;
+            else if (strcmp(name, "AD05") == 0) key = GLFW_KEY_T;
+            else if (strcmp(name, "AD06") == 0) key = GLFW_KEY_Y;
+            else if (strcmp(name, "AD07") == 0) key = GLFW_KEY_U;
+            else if (strcmp(name, "AD08") == 0) key = GLFW_KEY_I;
+            else if (strcmp(name, "AD09") == 0) key = GLFW_KEY_O;
+            else if (strcmp(name, "AD10") == 0) key = GLFW_KEY_P;
+            else if (strcmp(name, "AD11") == 0) key = GLFW_KEY_LEFT_BRACKET;
+            else if (strcmp(name, "AD12") == 0) key = GLFW_KEY_RIGHT_BRACKET;
+            else if (strcmp(name, "AC01") == 0) key = GLFW_KEY_A;
+            else if (strcmp(name, "AC02") == 0) key = GLFW_KEY_S;
+            else if (strcmp(name, "AC03") == 0) key = GLFW_KEY_D;
+            else if (strcmp(name, "AC04") == 0) key = GLFW_KEY_F;
+            else if (strcmp(name, "AC05") == 0) key = GLFW_KEY_G;
+            else if (strcmp(name, "AC06") == 0) key = GLFW_KEY_H;
+            else if (strcmp(name, "AC07") == 0) key = GLFW_KEY_J;
+            else if (strcmp(name, "AC08") == 0) key = GLFW_KEY_K;
+            else if (strcmp(name, "AC09") == 0) key = GLFW_KEY_L;
+            else if (strcmp(name, "AC10") == 0) key = GLFW_KEY_SEMICOLON;
+            else if (strcmp(name, "AC11") == 0) key = GLFW_KEY_APOSTROPHE;
+            else if (strcmp(name, "AB01") == 0) key = GLFW_KEY_Z;
+            else if (strcmp(name, "AB02") == 0) key = GLFW_KEY_X;
+            else if (strcmp(name, "AB03") == 0) key = GLFW_KEY_C;
+            else if (strcmp(name, "AB04") == 0) key = GLFW_KEY_V;
+            else if (strcmp(name, "AB05") == 0) key = GLFW_KEY_B;
+            else if (strcmp(name, "AB06") == 0) key = GLFW_KEY_N;
+            else if (strcmp(name, "AB07") == 0) key = GLFW_KEY_M;
+            else if (strcmp(name, "AB08") == 0) key = GLFW_KEY_COMMA;
+            else if (strcmp(name, "AB09") == 0) key = GLFW_KEY_PERIOD;
+            else if (strcmp(name, "AB10") == 0) key = GLFW_KEY_SLASH;
+            else if (strcmp(name, "BKSL") == 0) key = GLFW_KEY_BACKSLASH;
+            else if (strcmp(name, "LSGT") == 0) key = GLFW_KEY_WORLD_1;
+            else key = GLFW_KEY_UNKNOWN;
+
+            if ((scancode >= 0) && (scancode < 256))
+                _glfw.x11.publicKeys[scancode] = key;
+        }
+
+        XkbFreeNames(desc, XkbKeyNamesMask, True);
+        XkbFreeKeyboard(desc, 0, True);
+    }
+
+    for (scancode = 0;  scancode < 256;  scancode++)
+    {
+        // Translate the un-translated key codes using traditional X11 KeySym
+        // lookups
+        if (_glfw.x11.publicKeys[scancode] < 0)
+            _glfw.x11.publicKeys[scancode] = translateKeyCode(scancode);
+
+        // Store the reverse translation for faster key name lookup
+        if (_glfw.x11.publicKeys[scancode] > 0)
+            _glfw.x11.nativeKeys[_glfw.x11.publicKeys[scancode]] = scancode;
+    }
+}
+
+// Check whether the IM has a usable style
+//
+static GLFWbool hasUsableInputMethodStyle(void)
+{
+    unsigned int i;
+    GLFWbool found = GLFW_FALSE;
+    XIMStyles* styles = NULL;
+
+    if (XGetIMValues(_glfw.x11.im, XNQueryInputStyle, &styles, NULL) != NULL)
+        return GLFW_FALSE;
+
+    for (i = 0;  i < styles->count_styles;  i++)
+    {
+        if (styles->supported_styles[i] == (XIMPreeditNothing | XIMStatusNothing))
+        {
+            found = GLFW_TRUE;
+            break;
+        }
+    }
+
+    XFree(styles);
+    return found;
+}
+
+// Check whether the specified atom is supported
+//
+static Atom getSupportedAtom(Atom* supportedAtoms,
+                             unsigned long atomCount,
+                             const char* atomName)
+{
+    unsigned long i;
+    const Atom atom = XInternAtom(_glfw.x11.display, atomName, False);
+
+    for (i = 0;  i < atomCount;  i++)
+    {
+        if (supportedAtoms[i] == atom)
+            return atom;
+    }
+
+    return None;
+}
+
+// Check whether the running window manager is EWMH-compliant
+//
+static void detectEWMH(void)
+{
+    Window* windowFromRoot = NULL;
+    Window* windowFromChild = NULL;
+
+    // First we need a couple of atoms
+    const Atom supportingWmCheck =
+        XInternAtom(_glfw.x11.display, "_NET_SUPPORTING_WM_CHECK", False);
+    const Atom wmSupported =
+        XInternAtom(_glfw.x11.display, "_NET_SUPPORTED", False);
+
+    // Then we look for the _NET_SUPPORTING_WM_CHECK property of the root window
+    if (_glfwGetWindowPropertyX11(_glfw.x11.root,
+                                  supportingWmCheck,
+                                  XA_WINDOW,
+                                  (unsigned char**) &windowFromRoot) != 1)
+    {
+        if (windowFromRoot)
+            XFree(windowFromRoot);
+        return;
+    }
+
+    _glfwGrabErrorHandlerX11();
+
+    // It should be the ID of a child window (of the root)
+    // Then we look for the same property on the child window
+    if (_glfwGetWindowPropertyX11(*windowFromRoot,
+                                  supportingWmCheck,
+                                  XA_WINDOW,
+                                  (unsigned char**) &windowFromChild) != 1)
+    {
+        XFree(windowFromRoot);
+        if (windowFromChild)
+            XFree(windowFromChild);
+        return;
+    }
+
+    _glfwReleaseErrorHandlerX11();
+
+    // It should be the ID of that same child window
+    if (*windowFromRoot != *windowFromChild)
+    {
+        XFree(windowFromRoot);
+        XFree(windowFromChild);
+        return;
+    }
+
+    XFree(windowFromRoot);
+    XFree(windowFromChild);
+
+    // We are now fairly sure that an EWMH-compliant window manager is running
+
+    Atom* supportedAtoms;
+    unsigned long atomCount;
+
+    // Now we need to check the _NET_SUPPORTED property of the root window
+    // It should be a list of supported WM protocol and state atoms
+    atomCount = _glfwGetWindowPropertyX11(_glfw.x11.root,
+                                          wmSupported,
+                                          XA_ATOM,
+                                          (unsigned char**) &supportedAtoms);
+
+    // See which of the atoms we support that are supported by the WM
+    _glfw.x11.NET_WM_STATE =
+        getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_STATE");
+    _glfw.x11.NET_WM_STATE_ABOVE =
+        getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_STATE_ABOVE");
+    _glfw.x11.NET_WM_STATE_FULLSCREEN =
+        getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_STATE_FULLSCREEN");
+    _glfw.x11.NET_WM_STATE_MAXIMIZED_VERT =
+        getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_STATE_MAXIMIZED_VERT");
+    _glfw.x11.NET_WM_STATE_MAXIMIZED_HORZ =
+        getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_STATE_MAXIMIZED_HORZ");
+    _glfw.x11.NET_WM_FULLSCREEN_MONITORS =
+        getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_FULLSCREEN_MONITORS");
+    _glfw.x11.NET_WM_WINDOW_TYPE =
+        getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_WINDOW_TYPE");
+    _glfw.x11.NET_WM_WINDOW_TYPE_NORMAL =
+        getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_WINDOW_TYPE_NORMAL");
+    _glfw.x11.NET_ACTIVE_WINDOW =
+        getSupportedAtom(supportedAtoms, atomCount, "_NET_ACTIVE_WINDOW");
+    _glfw.x11.NET_FRAME_EXTENTS =
+        getSupportedAtom(supportedAtoms, atomCount, "_NET_FRAME_EXTENTS");
+    _glfw.x11.NET_REQUEST_FRAME_EXTENTS =
+        getSupportedAtom(supportedAtoms, atomCount, "_NET_REQUEST_FRAME_EXTENTS");
+
+    XFree(supportedAtoms);
+}
+
+// Initialize X11 display and look for supported X11 extensions
+//
+static GLFWbool initExtensions(void)
+{
+#if defined(_GLFW_HAS_XF86VM)
+    // Check for XF86VidMode extension
+    _glfw.x11.vidmode.available =
+        XF86VidModeQueryExtension(_glfw.x11.display,
+                                  &_glfw.x11.vidmode.eventBase,
+                                  &_glfw.x11.vidmode.errorBase);
+#endif /*_GLFW_HAS_XF86VM*/
+
+    // Check for RandR extension
+    if (XRRQueryExtension(_glfw.x11.display,
+                          &_glfw.x11.randr.eventBase,
+                          &_glfw.x11.randr.errorBase))
+    {
+        if (XRRQueryVersion(_glfw.x11.display,
+                            &_glfw.x11.randr.major,
+                            &_glfw.x11.randr.minor))
+        {
+            // The GLFW RandR path requires at least version 1.3
+            if (_glfw.x11.randr.major > 1 || _glfw.x11.randr.minor >= 3)
+                _glfw.x11.randr.available = GLFW_TRUE;
+        }
+        else
+        {
+            _glfwInputError(GLFW_PLATFORM_ERROR,
+                            "X11: Failed to query RandR version");
+        }
+    }
+
+    if (_glfw.x11.randr.available)
+    {
+        XRRScreenResources* sr = XRRGetScreenResources(_glfw.x11.display,
+                                                       _glfw.x11.root);
+
+        if (!sr->ncrtc || !XRRGetCrtcGammaSize(_glfw.x11.display, sr->crtcs[0]))
+        {
+            // This is either a headless system or an older Nvidia binary driver
+            // with broken gamma support
+            // Flag it as useless and fall back to Xf86VidMode gamma, if
+            // available
+            _glfwInputError(GLFW_PLATFORM_ERROR,
+                            "X11: RandR gamma ramp support seems broken");
+            _glfw.x11.randr.gammaBroken = GLFW_TRUE;
+        }
+
+        XRRFreeScreenResources(sr);
+
+        XRRSelectInput(_glfw.x11.display, _glfw.x11.root,
+                       RROutputChangeNotifyMask);
+    }
+
+    if (XineramaQueryExtension(_glfw.x11.display,
+                               &_glfw.x11.xinerama.major,
+                               &_glfw.x11.xinerama.minor))
+    {
+        if (XineramaIsActive(_glfw.x11.display))
+            _glfw.x11.xinerama.available = GLFW_TRUE;
+    }
+
+    // Check if Xkb is supported on this display
+    _glfw.x11.xkb.major = 1;
+    _glfw.x11.xkb.minor = 0;
+    _glfw.x11.xkb.available =
+        XkbQueryExtension(_glfw.x11.display,
+                          &_glfw.x11.xkb.majorOpcode,
+                          &_glfw.x11.xkb.eventBase,
+                          &_glfw.x11.xkb.errorBase,
+                          &_glfw.x11.xkb.major,
+                          &_glfw.x11.xkb.minor);
+
+    if (_glfw.x11.xkb.available)
+    {
+        Bool supported;
+
+        if (XkbSetDetectableAutoRepeat(_glfw.x11.display, True, &supported))
+        {
+            if (supported)
+                _glfw.x11.xkb.detectable = GLFW_TRUE;
+        }
+    }
+
+    _glfw.x11.x11xcb.handle = dlopen("libX11-xcb.so", RTLD_LAZY | RTLD_GLOBAL);
+    if (_glfw.x11.x11xcb.handle)
+    {
+        _glfw.x11.x11xcb.XGetXCBConnection = (XGETXCBCONNECTION_T)
+            dlsym(_glfw.x11.x11xcb.handle, "XGetXCBConnection");
+    }
+
+    // Update the key code LUT
+    // FIXME: We should listen to XkbMapNotify events to track changes to
+    // the keyboard mapping.
+    createKeyTables();
+
+    // Detect whether an EWMH-conformant window manager is running
+    detectEWMH();
+
+    // String format atoms
+    _glfw.x11.NULL_ = XInternAtom(_glfw.x11.display, "NULL", False);
+    _glfw.x11.UTF8_STRING =
+        XInternAtom(_glfw.x11.display, "UTF8_STRING", False);
+    _glfw.x11.COMPOUND_STRING =
+        XInternAtom(_glfw.x11.display, "COMPOUND_STRING", False);
+    _glfw.x11.ATOM_PAIR = XInternAtom(_glfw.x11.display, "ATOM_PAIR", False);
+
+    // Custom selection property atom
+    _glfw.x11.GLFW_SELECTION =
+        XInternAtom(_glfw.x11.display, "GLFW_SELECTION", False);
+
+    // ICCCM standard clipboard atoms
+    _glfw.x11.TARGETS = XInternAtom(_glfw.x11.display, "TARGETS", False);
+    _glfw.x11.MULTIPLE = XInternAtom(_glfw.x11.display, "MULTIPLE", False);
+    _glfw.x11.CLIPBOARD = XInternAtom(_glfw.x11.display, "CLIPBOARD", False);
+
+    // Clipboard manager atoms
+    _glfw.x11.CLIPBOARD_MANAGER =
+        XInternAtom(_glfw.x11.display, "CLIPBOARD_MANAGER", False);
+    _glfw.x11.SAVE_TARGETS =
+        XInternAtom(_glfw.x11.display, "SAVE_TARGETS", False);
+
+    // Xdnd (drag and drop) atoms
+    _glfw.x11.XdndAware = XInternAtom(_glfw.x11.display, "XdndAware", False);
+    _glfw.x11.XdndEnter = XInternAtom(_glfw.x11.display, "XdndEnter", False);
+    _glfw.x11.XdndPosition = XInternAtom(_glfw.x11.display, "XdndPosition", False);
+    _glfw.x11.XdndStatus = XInternAtom(_glfw.x11.display, "XdndStatus", False);
+    _glfw.x11.XdndActionCopy = XInternAtom(_glfw.x11.display, "XdndActionCopy", False);
+    _glfw.x11.XdndDrop = XInternAtom(_glfw.x11.display, "XdndDrop", False);
+    _glfw.x11.XdndLeave = XInternAtom(_glfw.x11.display, "XdndLeave", False);
+    _glfw.x11.XdndFinished = XInternAtom(_glfw.x11.display, "XdndFinished", False);
+    _glfw.x11.XdndSelection = XInternAtom(_glfw.x11.display, "XdndSelection", False);
+
+    // ICCCM, EWMH and Motif window property atoms
+    // These can be set safely even without WM support
+    // The EWMH atoms that require WM support are handled in detectEWMH
+    _glfw.x11.WM_PROTOCOLS =
+        XInternAtom(_glfw.x11.display, "WM_PROTOCOLS", False);
+    _glfw.x11.WM_STATE =
+        XInternAtom(_glfw.x11.display, "WM_STATE", False);
+    _glfw.x11.WM_DELETE_WINDOW =
+        XInternAtom(_glfw.x11.display, "WM_DELETE_WINDOW", False);
+    _glfw.x11.NET_WM_ICON =
+        XInternAtom(_glfw.x11.display, "_NET_WM_ICON", False);
+    _glfw.x11.NET_WM_PING =
+        XInternAtom(_glfw.x11.display, "_NET_WM_PING", False);
+    _glfw.x11.NET_WM_PID =
+        XInternAtom(_glfw.x11.display, "_NET_WM_PID", False);
+    _glfw.x11.NET_WM_NAME =
+        XInternAtom(_glfw.x11.display, "_NET_WM_NAME", False);
+    _glfw.x11.NET_WM_ICON_NAME =
+        XInternAtom(_glfw.x11.display, "_NET_WM_ICON_NAME", False);
+    _glfw.x11.NET_WM_BYPASS_COMPOSITOR =
+        XInternAtom(_glfw.x11.display, "_NET_WM_BYPASS_COMPOSITOR", False);
+    _glfw.x11.MOTIF_WM_HINTS =
+        XInternAtom(_glfw.x11.display, "_MOTIF_WM_HINTS", False);
+
+    return GLFW_TRUE;
+}
+
+// Create a blank cursor for hidden and disabled cursor modes
+//
+static Cursor createHiddenCursor(void)
+{
+    unsigned char pixels[16 * 16 * 4];
+    GLFWimage image = { 16, 16, pixels };
+
+    memset(pixels, 0, sizeof(pixels));
+
+    return _glfwCreateCursorX11(&image, 0, 0);
+}
+
+// X error handler
+//
+static int errorHandler(Display *display, XErrorEvent* event)
+{
+    _glfw.x11.errorCode = event->error_code;
+    return 0;
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+//////                       GLFW internal API                      //////
+//////////////////////////////////////////////////////////////////////////
+
+// Sets the X error handler callback
+//
+void _glfwGrabErrorHandlerX11(void)
+{
+    _glfw.x11.errorCode = Success;
+    XSetErrorHandler(errorHandler);
+}
+
+// Clears the X error handler callback
+//
+void _glfwReleaseErrorHandlerX11(void)
+{
+    // Synchronize to make sure all commands are processed
+    XSync(_glfw.x11.display, False);
+    XSetErrorHandler(NULL);
+}
+
+// Reports the specified error, appending information about the last X error
+//
+void _glfwInputErrorX11(int error, const char* message)
+{
+    char buffer[8192];
+    XGetErrorText(_glfw.x11.display, _glfw.x11.errorCode,
+                  buffer, sizeof(buffer));
+
+    _glfwInputError(error, "%s: %s", message, buffer);
+}
+
+// Creates a native cursor object from the specified image and hotspot
+//
+Cursor _glfwCreateCursorX11(const GLFWimage* image, int xhot, int yhot)
+{
+    int i;
+    Cursor cursor;
+
+    XcursorImage* native = XcursorImageCreate(image->width, image->height);
+    if (native == NULL)
+        return None;
+
+    native->xhot = xhot;
+    native->yhot = yhot;
+
+    unsigned char* source = (unsigned char*) image->pixels;
+    XcursorPixel* target = native->pixels;
+
+    for (i = 0;  i < image->width * image->height;  i++, target++, source += 4)
+    {
+        unsigned int alpha = source[3];
+
+        *target = (alpha << 24) |
+                  ((unsigned char) ((source[0] * alpha) / 255) << 16) |
+                  ((unsigned char) ((source[1] * alpha) / 255) <<  8) |
+                  ((unsigned char) ((source[2] * alpha) / 255) <<  0);
+    }
+
+    cursor = XcursorImageLoadCursor(_glfw.x11.display, native);
+    XcursorImageDestroy(native);
+
+    return cursor;
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+//////                       GLFW platform API                      //////
+//////////////////////////////////////////////////////////////////////////
+
+int _glfwPlatformInit(void)
+{
+#if !defined(X_HAVE_UTF8_STRING)
+    // HACK: If the current locale is C, apply the environment's locale
+    //       This is done because the C locale breaks wide character input
+    if (strcmp(setlocale(LC_CTYPE, NULL), "C") == 0)
+        setlocale(LC_CTYPE, "");
+#endif
+
+    XInitThreads();
+
+    _glfw.x11.display = XOpenDisplay(NULL);
+    if (!_glfw.x11.display)
+    {
+        const char* display = getenv("DISPLAY");
+        if (display)
+        {
+            _glfwInputError(GLFW_PLATFORM_ERROR,
+                            "X11: Failed to open display %s", display);
+        }
+        else
+        {
+            _glfwInputError(GLFW_PLATFORM_ERROR,
+                            "X11: The DISPLAY environment variable is missing");
+        }
+
+        return GLFW_FALSE;
+    }
+
+    _glfw.x11.screen = DefaultScreen(_glfw.x11.display);
+    _glfw.x11.root = RootWindow(_glfw.x11.display, _glfw.x11.screen);
+    _glfw.x11.context = XUniqueContext();
+
+    if (!initExtensions())
+        return GLFW_FALSE;
+
+    _glfw.x11.cursor = createHiddenCursor();
+
+    if (XSupportsLocale())
+    {
+        XSetLocaleModifiers("");
+
+        _glfw.x11.im = XOpenIM(_glfw.x11.display, 0, NULL, NULL);
+        if (_glfw.x11.im)
+        {
+            if (!hasUsableInputMethodStyle())
+            {
+                XCloseIM(_glfw.x11.im);
+                _glfw.x11.im = NULL;
+            }
+        }
+    }
+
+    if (!_glfwInitThreadLocalStoragePOSIX())
+        return GLFW_FALSE;
+
+    if (!_glfwInitJoysticksLinux())
+        return GLFW_FALSE;
+
+    _glfwInitTimerPOSIX();
+
+    return GLFW_TRUE;
+}
+
+void _glfwPlatformTerminate(void)
+{
+    if (_glfw.x11.x11xcb.handle)
+    {
+        dlclose(_glfw.x11.x11xcb.handle);
+        _glfw.x11.x11xcb.handle = NULL;
+    }
+
+    if (_glfw.x11.cursor)
+    {
+        XFreeCursor(_glfw.x11.display, _glfw.x11.cursor);
+        _glfw.x11.cursor = (Cursor) 0;
+    }
+
+    free(_glfw.x11.clipboardString);
+
+    if (_glfw.x11.im)
+    {
+        XCloseIM(_glfw.x11.im);
+        _glfw.x11.im = NULL;
+    }
+
+    _glfwTerminateEGL();
+
+    if (_glfw.x11.display)
+    {
+        XCloseDisplay(_glfw.x11.display);
+        _glfw.x11.display = NULL;
+    }
+
+    // NOTE: This needs to be done after XCloseDisplay, as libGL registers
+    //       cleanup callbacks that get called by it
+    _glfwTerminateGLX();
+
+    _glfwTerminateJoysticksLinux();
+    _glfwTerminateThreadLocalStoragePOSIX();
+}
+
+const char* _glfwPlatformGetVersionString(void)
+{
+    return _GLFW_VERSION_NUMBER " X11 GLX EGL"
+#if defined(_POSIX_TIMERS) && defined(_POSIX_MONOTONIC_CLOCK)
+        " clock_gettime"
+#else
+        " gettimeofday"
+#endif
+#if defined(__linux__)
+        " /dev/js"
+#endif
+#if defined(_GLFW_HAS_XF86VM)
+        " Xf86vm"
+#endif
+#if defined(_GLFW_BUILD_DLL)
+        " shared"
+#endif
+        ;
+}
+