Add DisplayGL::getDriverVersion and implementation on Linux NVIDIA

BUILD.gn

@@ -254,6 +254,13 @@ static_library("libANGLE") {
   libs = []
   defines = [ "LIBANGLE_IMPLEMENTATION" ]
 
+  deps = [
+    ":angle_common",
+    ":commit_id",
+    ":includes",
+    ":translator_static",
+  ]
+
   # Shared D3D sources.
   if (angle_enable_d3d9 || angle_enable_d3d11) {
     sources += rebase_path(gles_gypi.libangle_d3d_shared_sources, ".", "src")
@@ -281,7 +288,14 @@ static_library("libANGLE") {
     }
     if (use_x11) {
       sources += rebase_path(gles_gypi.libangle_gl_glx_sources, ".", "src")
-      libs += [ "X11" ]
+      deps += [
+        "src/third_party/libXNVCtrl:libXNVCtrl"
+      ]
+      libs += [
+        "X11",
+        "Xi",
+        "Xext",
+      ]
     }
   }
 
@@ -298,13 +312,6 @@ static_library("libANGLE") {
     "//build/config/compiler:no_chromium_code",
   ]
 
-  deps = [
-    ":angle_common",
-    ":commit_id",
-    ":includes",
-    ":translator_static",
-  ]
-
   if (is_win) {
     deps += [ ":copy_compiler_dll" ]
   }

src/libANGLE/renderer/gl/DisplayGL.h

@@ -36,6 +36,8 @@ class DisplayGL : public DisplayImpl
 
     egl::Error makeCurrent(egl::Surface *drawSurface, egl::Surface *readSurface, gl::Context *context) override;
 
+    virtual egl::Error getDriverVersion(std::string *version) const = 0;
+
   protected:
     RendererGL *getRenderer() const { return mRenderer; };
     const gl::Version &getMaxSupportedESVersion() const;

src/libANGLE/renderer/gl/cgl/DisplayCGL.h

@@ -55,6 +55,8 @@ class DisplayCGL : public DisplayGL
                           egl::Surface *drawSurface,
                           egl::Surface *readSurface) const override;
 
+    egl::Error getDriverVersion(std::string *version) const override;
+
   private:
     const FunctionsGL *getFunctionsGL() const override;
 

src/libANGLE/renderer/gl/cgl/DisplayCGL.mm

@@ -269,4 +269,10 @@ egl::Error DisplayCGL::waitNative(EGLint engine,
     // TODO(cwallez) UNIMPLEMENTED()
     return egl::Error(EGL_SUCCESS);
 }
+
+egl::Error DisplayCGL::getDriverVersion(std::string *version) const
+{
+    *version = "";
+    return egl::Error(EGL_SUCCESS);
+}
 }

src/libANGLE/renderer/gl/glx/DisplayGLX.cpp

@@ -18,6 +18,8 @@
 #include "libANGLE/renderer/gl/glx/PbufferSurfaceGLX.h"
 #include "libANGLE/renderer/gl/glx/WindowSurfaceGLX.h"
 #include "libANGLE/renderer/gl/renderergl_utils.h"
+#include "third_party/libXNVCtrl/NVCtrl.h"
+#include "third_party/libXNVCtrl/NVCtrlLib.h"
 
 namespace rx
 {
@@ -70,6 +72,7 @@ DisplayGLX::DisplayGLX()
       mMinSwapInterval(0),
       mMaxSwapInterval(0),
       mCurrentSwapInterval(-1),
+      mXDisplay(nullptr),
       mEGLDisplay(nullptr)
 {
 }
@@ -81,24 +84,24 @@ DisplayGLX::~DisplayGLX()
 egl::Error DisplayGLX::initialize(egl::Display *display)
 {
     mEGLDisplay = display;
-    Display *xDisplay = display->getNativeDisplayId();
+    mXDisplay             = display->getNativeDisplayId();
     const auto &attribMap = display->getAttributeMap();
 
     // ANGLE_platform_angle allows the creation of a default display
     // using EGL_DEFAULT_DISPLAY (= nullptr). In this case just open
     // the display specified by the DISPLAY environment variable.
-    if (xDisplay == EGL_DEFAULT_DISPLAY)
+    if (mXDisplay == EGL_DEFAULT_DISPLAY)
     {
         mUsesNewXDisplay = true;
-        xDisplay = XOpenDisplay(NULL);
-        if (!xDisplay)
+        mXDisplay = XOpenDisplay(NULL);
+        if (!mXDisplay)
         {
             return egl::Error(EGL_NOT_INITIALIZED, "Could not open the default X display.");
         }
     }
 
     std::string glxInitError;
-    if (!mGLX.initialize(xDisplay, DefaultScreen(xDisplay), &glxInitError))
+    if (!mGLX.initialize(mXDisplay, DefaultScreen(mXDisplay), &glxInitError))
     {
         return egl::Error(EGL_NOT_INITIALIZED, glxInitError.c_str());
     }
@@ -235,7 +238,8 @@ egl::Error DisplayGLX::initialize(egl::Display *display)
         visualTemplate.visualid = getGLXFBConfigAttrib(mContextConfig, GLX_VISUAL_ID);
 
         int numVisuals       = 0;
-        XVisualInfo *visuals = XGetVisualInfo(xDisplay, VisualIDMask, &visualTemplate, &numVisuals);
+        XVisualInfo *visuals =
+            XGetVisualInfo(mXDisplay, VisualIDMask, &visualTemplate, &numVisuals);
         if (numVisuals <= 0)
         {
             return egl::Error(EGL_NOT_INITIALIZED,
@@ -301,6 +305,9 @@ egl::Error DisplayGLX::initialize(egl::Display *display)
         reinterpret_cast<const char*>(mFunctionsGL->getString(GL_RENDERER));
     mIsMesa = rendererString.find("Mesa") != std::string::npos;
 
+    std::string version;
+    getDriverVersion(&version);
+
     return DisplayGL::initialize(display);
 }
 
@@ -711,6 +718,20 @@ egl::Error DisplayGLX::waitClient() const
     return egl::Error(EGL_SUCCESS);
 }
 
+egl::Error DisplayGLX::getDriverVersion(std::string *version) const
+{
+    VendorID vendor = GetVendorID(mFunctionsGL);
+
+    switch (vendor)
+    {
+        case VENDOR_ID_NVIDIA:
+            return getNVIDIADriverVersion(version);
+        default:
+            *version = "";
+            return egl::Error(EGL_SUCCESS);
+    }
+}
+
 egl::Error DisplayGLX::waitNative(EGLint engine,
                                   egl::Surface *drawSurface,
                                   egl::Surface *readSurface) const
@@ -859,4 +880,29 @@ egl::Error DisplayGLX::createContextAttribs(glx::FBConfig,
     }
     return egl::Error(EGL_SUCCESS);
 }
+
+egl::Error DisplayGLX::getNVIDIADriverVersion(std::string *version) const
+{
+    *version = "";
+
+    int eventBase = 0;
+    int errorBase = 0;
+    if (XNVCTRLQueryExtension(mXDisplay, &eventBase, &errorBase))
+    {
+        int screenCount = ScreenCount(mXDisplay);
+        for (int screen = 0; screen < screenCount; ++screen)
+        {
+            char *buffer = nullptr;
+            if (XNVCTRLIsNvScreen(mXDisplay, screen) &&
+                XNVCTRLQueryStringAttribute(mXDisplay, screen, 0,
+                                            NV_CTRL_STRING_NVIDIA_DRIVER_VERSION, &buffer))
+            {
+                *version = buffer;
+                XFree(buffer);
+            }
+        }
+    }
+
+    return egl::Error(EGL_SUCCESS);
+}
 }

src/libANGLE/renderer/gl/glx/DisplayGLX.h

@@ -72,6 +72,8 @@ class DisplayGLX : public DisplayGL
                           egl::Surface *drawSurface,
                           egl::Surface *readSurface) const override;
 
+    egl::Error getDriverVersion(std::string *version) const override;
+
     // Synchronizes with the X server, if the display has been opened by ANGLE.
     // Calling this is required at the end of every functions that does buffered
     // X calls (not for glX calls) otherwise there might be race conditions
@@ -102,6 +104,8 @@ class DisplayGLX : public DisplayGL
                                     int profileMask,
                                     glx::Context *context) const;
 
+    egl::Error getNVIDIADriverVersion(std::string *version) const;
+
     FunctionsGL *mFunctionsGL;
 
     //TODO(cwallez) yuck, change generateConfigs to be non-const or add a userdata member to egl::Config?
@@ -133,6 +137,7 @@ class DisplayGLX : public DisplayGL
     int mCurrentSwapInterval;
 
     FunctionsGLX mGLX;
+    Display *mXDisplay;
     egl::Display *mEGLDisplay;
 };
 

src/libANGLE/renderer/gl/renderergl_utils.h

@@ -30,6 +30,7 @@ class FunctionsGL;
 struct WorkaroundsGL;
 
 VendorID GetVendorID(const FunctionsGL *functions);
+std::string GetDriverVersion(const FunctionsGL *functions);
 
 namespace nativegl_gl
 {

src/libANGLE/renderer/gl/wgl/DisplayWGL.cpp

@@ -641,6 +641,12 @@ egl::Error DisplayWGL::waitNative(EGLint engine,
     return egl::Error(EGL_SUCCESS);
 }
 
+egl::Error DisplayWGL::getDriverVersion(std::string *version) const
+{
+    *version = "";
+    return egl::Error(EGL_SUCCESS);
+}
+
 egl::Error DisplayWGL::registerD3DDevice(IUnknown *device, HANDLE *outHandle)
 {
     ASSERT(device != nullptr);

src/libANGLE/renderer/gl/wgl/DisplayWGL.h

@@ -57,6 +57,8 @@ class DisplayWGL : public DisplayGL
                           egl::Surface *drawSurface,
                           egl::Surface *readSurface) const override;
 
+    egl::Error getDriverVersion(std::string *version) const override;
+
     egl::Error registerD3DDevice(IUnknown *device, HANDLE *outHandle);
     void releaseD3DDevice(HANDLE handle);
 

src/libGLESv2.gypi

@@ -613,7 +613,7 @@
                                 'defines':
                                 [
                                     'ANGLE_USE_X11',
-                                ]
+                                ],
                             }],
                         ],
                     }],
@@ -732,16 +732,20 @@
                             [
                                 'ANGLE_USE_X11',
                             ],
+                            'dependencies':
+                            [
+                                '<(angle_path)/src/third_party/libXNVCtrl/libXNVCtrl.gyp:libXNVCtrl',
+                            ],
                             'sources':
                             [
                                 '<@(libangle_gl_glx_sources)',
                             ],
                             'link_settings': {
                                 'ldflags': [
-                                    '<!@(<(pkg-config) --libs-only-L --libs-only-other x11 xi)',
+                                    '<!@(<(pkg-config) --libs-only-L --libs-only-other x11 xi xext)',
                                 ],
                                 'libraries': [
-                                    '<!@(<(pkg-config) --libs-only-l x11 xi) -ldl',
+                                    '<!@(<(pkg-config) --libs-only-l x11 xi xext) -ldl',
                                 ],
                             },
                         }],

src/third_party/libXNVCtrl/BUILD.gn

+# Copyright (c) 2016 The ANGLE Project Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+static_library("libXNVCtrl") {
+    sources = [
+        "NVCtrl.c",
+        "NVCtrl.h",
+        "NVCtrlLib.h",
+        "nv_control.h",
+    ]
+}

src/third_party/libXNVCtrl/LICENSE

+/*
+ * Copyright (c) 2008 NVIDIA, Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
\ No newline at end of file

src/third_party/libXNVCtrl/NVCtrl.c

+/*
+ * Copyright (c) 2008 NVIDIA, Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+/*
+ * Make sure that XTHREADS is defined, so that the
+ * LockDisplay/UnlockDisplay macros are expanded properly and the
+ * libXNVCtrl library properly protects the Display connection.
+ */
+
+#if !defined(XTHREADS)
+#define XTHREADS
+#endif /* XTHREADS */
+
+#define NEED_EVENTS
+#define NEED_REPLIES
+#include <stdint.h>
+#include <stdlib.h>
+#include <X11/Xlibint.h>
+#include <X11/Xutil.h>
+#include <X11/extensions/Xext.h>
+#include <X11/extensions/extutil.h>
+#include "NVCtrlLib.h"
+#include "nv_control.h"
+
+#define NVCTRL_EXT_EXISTS              1
+#define NVCTRL_EXT_NEED_TARGET_SWAP    2
+#define NVCTRL_EXT_64_BIT_ATTRIBUTES   4
+#define NVCTRL_EXT_NEED_CHECK          (1 << (sizeof(XPointer) - 1))
+
+static XExtensionInfo _nvctrl_ext_info_data;
+static XExtensionInfo *nvctrl_ext_info = &_nvctrl_ext_info_data;
+static const char *nvctrl_extension_name = NV_CONTROL_NAME;
+
+#define XNVCTRLCheckExtension(dpy,i,val) \
+  XextCheckExtension (dpy, i, nvctrl_extension_name, val)
+#define XNVCTRLSimpleCheckExtension(dpy,i) \
+  XextSimpleCheckExtension (dpy, i, nvctrl_extension_name)
+
+static int close_display();
+static uintptr_t version_flags(Display *dpy, XExtDisplayInfo *info);
+static Bool wire_to_event();
+static /* const */ XExtensionHooks nvctrl_extension_hooks = {
+    NULL,                               /* create_gc */
+    NULL,                               /* copy_gc */
+    NULL,                               /* flush_gc */
+    NULL,                               /* free_gc */
+    NULL,                               /* create_font */
+    NULL,                               /* free_font */
+    close_display,                      /* close_display */
+    wire_to_event,                      /* wire_to_event */
+    NULL,                               /* event_to_wire */
+    NULL,                               /* error */
+    NULL,                               /* error_string */
+};
+
+static XEXT_GENERATE_FIND_DISPLAY (find_display, nvctrl_ext_info,
+                                   nvctrl_extension_name,
+                                   &nvctrl_extension_hooks,
+                                   NV_CONTROL_EVENTS,
+                                   (XPointer)NVCTRL_EXT_NEED_CHECK)
+
+static XEXT_GENERATE_CLOSE_DISPLAY (close_display, nvctrl_ext_info)
+
+/*
+ * NV-CONTROL versions 1.8 and 1.9 pack the target_type and target_id
+ * fields in reversed order.  In order to talk to one of these servers,
+ * we need to swap these fields.
+ */
+
+static void XNVCTRLCheckTargetData(Display *dpy, XExtDisplayInfo *info,
+                                   int *target_type, int *target_id)
+{
+    uintptr_t flags = version_flags(dpy, info);
+
+    /* We need to swap the target_type and target_id */
+    if (flags & NVCTRL_EXT_NEED_TARGET_SWAP) {
+        int tmp;
+        tmp = *target_type;
+        *target_type = *target_id;
+        *target_id = tmp;
+    }
+}
+
+
+Bool XNVCTRLQueryExtension (
+    Display *dpy,
+    int *event_basep,
+    int *error_basep
+){
+    XExtDisplayInfo *info = find_display (dpy);
+
+    if (XextHasExtension(info)) {
+        if (event_basep) *event_basep = info->codes->first_event;
+        if (error_basep) *error_basep = info->codes->first_error;
+        return True;
+    } else {
+        return False;
+    }
+}
+
+/*
+ * Retrieve any cached flags that depend on the version of the NV-CONTROL
+ * extension.
+ */
+
+static uintptr_t version_flags(Display *dpy, XExtDisplayInfo *info)
+{
+    uintptr_t data = (uintptr_t)info->data;
+
+    /* If necessary, determine the NV-CONTROL version */
+    if (data & NVCTRL_EXT_NEED_CHECK) {
+        int major, minor;
+        data = 0;
+        if (XNVCTRLQueryVersion(dpy, &major, &minor)) {
+            data |= NVCTRL_EXT_EXISTS;
+            if (major == 1 && (minor == 8 || minor == 9)) {
+                data |= NVCTRL_EXT_NEED_TARGET_SWAP;
+            }
+            if ((major > 1) || ((major == 1) && (minor > 20))) {
+                data |= NVCTRL_EXT_64_BIT_ATTRIBUTES;
+            }
+        }
+
+        info->data = (XPointer)data;
+    }
+
+    return data;
+}
+
+Bool XNVCTRLQueryVersion (
+    Display *dpy,
+    int *major,
+    int *minor
+){
+    XExtDisplayInfo *info = find_display (dpy);
+    xnvCtrlQueryExtensionReply rep;
+    xnvCtrlQueryExtensionReq   *req;
+
+    if(!XextHasExtension(info))
+        return False;
+
+    XNVCTRLCheckExtension (dpy, info, False);
+
+    LockDisplay (dpy);
+    GetReq (nvCtrlQueryExtension, req);
+    req->reqType = info->codes->major_opcode;
+    req->nvReqType = X_nvCtrlQueryExtension;
+    if (!_XReply (dpy, (xReply *) &rep, 0, xTrue)) {
+        UnlockDisplay (dpy);
+        SyncHandle ();
+        return False;
+    }
+    if (major) *major = rep.major;
+    if (minor) *minor = rep.minor;
+    UnlockDisplay (dpy);
+    SyncHandle ();
+    return True;
+}
+
+
+Bool XNVCTRLIsNvScreen (
+    Display *dpy,
+    int screen
+){
+    XExtDisplayInfo *info = find_display (dpy);
+    xnvCtrlIsNvReply rep;
+    xnvCtrlIsNvReq   *req;
+    Bool isnv;
+
+    if(!XextHasExtension(info))
+        return False;
+
+    XNVCTRLCheckExtension (dpy, info, False);
+
+    LockDisplay (dpy);
+    GetReq (nvCtrlIsNv, req);
+    req->reqType = info->codes->major_opcode;
+    req->nvReqType = X_nvCtrlIsNv;
+    req->screen = screen;
+    if (!_XReply (dpy, (xReply *) &rep, 0, xTrue)) {
+        UnlockDisplay (dpy);
+        SyncHandle ();
+        return False;
+    }
+    isnv = rep.isnv;
+    UnlockDisplay (dpy);
+    SyncHandle ();
+    return isnv;
+}
+
+
+Bool XNVCTRLQueryTargetCount (
+    Display *dpy,
+    int target_type,
+    int *value
+){
+    XExtDisplayInfo *info = find_display (dpy);
+    xnvCtrlQueryTargetCountReply  rep;
+    xnvCtrlQueryTargetCountReq   *req;
+
+    if(!XextHasExtension(info))
+        return False;
+
+    XNVCTRLCheckExtension (dpy, info, False);
+
+    LockDisplay (dpy);
+    GetReq (nvCtrlQueryTargetCount, req);
+    req->reqType = info->codes->major_opcode;
+    req->nvReqType = X_nvCtrlQueryTargetCount;
+    req->target_type = target_type;
+    if (!_XReply (dpy, (xReply *) &rep, 0, xTrue)) {
+        UnlockDisplay (dpy);
+        SyncHandle ();
+        return False;
+    }
+    if (value) *value = rep.count;
+    UnlockDisplay (dpy);
+    SyncHandle ();
+    return True;
+}
+
+
+void XNVCTRLSetTargetAttribute (
+    Display *dpy,
+    int target_type,
+    int target_id,
+    unsigned int display_mask,
+    unsigned int attribute,
+    int value
+){
+    XExtDisplayInfo *info = find_display (dpy);
+    xnvCtrlSetAttributeReq *req;
+
+    XNVCTRLSimpleCheckExtension (dpy, info);
+    XNVCTRLCheckTargetData(dpy, info, &target_type, &target_id);
+
+    LockDisplay (dpy);
+    GetReq (nvCtrlSetAttribute, req);
+    req->reqType = info->codes->major_opcode;
+    req->nvReqType = X_nvCtrlSetAttribute;
+    req->target_type = target_type;
+    req->target_id = target_id;
+    req->display_mask = display_mask;
+    req->attribute = attribute;
+    req->value = value;
+    UnlockDisplay (dpy);
+    SyncHandle ();
+}
+
+void XNVCTRLSetAttribute (
+    Display *dpy,
+    int screen,
+    unsigned int display_mask,
+    unsigned int attribute,
+    int value
+){
+    XNVCTRLSetTargetAttribute (dpy, NV_CTRL_TARGET_TYPE_X_SCREEN, screen,
+                               display_mask, attribute, value);
+}
+
+
+Bool XNVCTRLSetTargetAttributeAndGetStatus (
+    Display *dpy,
+    int target_type,
+    int target_id,
+    unsigned int display_mask,
+    unsigned int attribute,
+    int value
+){
+    XExtDisplayInfo *info = find_display (dpy);
+    xnvCtrlSetAttributeAndGetStatusReq *req;
+    xnvCtrlSetAttributeAndGetStatusReply rep;
+    Bool success;
+
+    if(!XextHasExtension(info))
+        return False;
+
+    XNVCTRLCheckExtension (dpy, info, False);
+
+    LockDisplay (dpy);
+    GetReq (nvCtrlSetAttributeAndGetStatus, req);
+    req->reqType = info->codes->major_opcode;
+    req->nvReqType = X_nvCtrlSetAttributeAndGetStatus;
+    req->target_type = target_type;
+    req->target_id = target_id;
+    req->display_mask = display_mask;
+    req->attribute = attribute;
+    req->value = value;
+    if (!_XReply (dpy, (xReply *) &rep, 0, False)) {
+        UnlockDisplay (dpy);
+        SyncHandle ();
+        return False;
+    }
+    UnlockDisplay (dpy);
+    SyncHandle ();
+    
+    success = rep.flags;
+    return success;
+}
+
+Bool XNVCTRLSetAttributeAndGetStatus (
+    Display *dpy,
+    int screen,
+    unsigned int display_mask,
+    unsigned int attribute,
+    int value
+){
+    return XNVCTRLSetTargetAttributeAndGetStatus(dpy,
+                                                 NV_CTRL_TARGET_TYPE_X_SCREEN,
+                                                 screen, display_mask,
+                                                 attribute, value);
+}
+
+
+Bool XNVCTRLQueryTargetAttribute (
+    Display *dpy,
+    int target_type,
+    int target_id,
+    unsigned int display_mask,
+    unsigned int attribute,
+    int *value
+){
+    XExtDisplayInfo *info = find_display (dpy);
+    xnvCtrlQueryAttributeReply rep;
+    xnvCtrlQueryAttributeReq   *req;
+    Bool exists;
+
+    if(!XextHasExtension(info))
+        return False;
+
+    XNVCTRLCheckExtension (dpy, info, False);
+    XNVCTRLCheckTargetData(dpy, info, &target_type, &target_id);
+
+    LockDisplay (dpy);
+    GetReq (nvCtrlQueryAttribute, req);
+    req->reqType = info->codes->major_opcode;
+    req->nvReqType = X_nvCtrlQueryAttribute;
+    req->target_type = target_type;
+    req->target_id = target_id;
+    req->display_mask = display_mask;
+    req->attribute = attribute;
+    if (!_XReply (dpy, (xReply *) &rep, 0, xTrue)) {
+        UnlockDisplay (dpy);
+        SyncHandle ();
+        return False;
+    }
+    exists = rep.flags;
+    if (exists && value) *value = rep.value;
+    UnlockDisplay (dpy);
+    SyncHandle ();
+    return exists;
+}
+
+Bool XNVCTRLQueryAttribute (
+    Display *dpy,
+    int screen,
+    unsigned int display_mask,
+    unsigned int attribute,
+    int *value
+){
+    return XNVCTRLQueryTargetAttribute(dpy, NV_CTRL_TARGET_TYPE_X_SCREEN,
+                                       screen, display_mask, attribute, value);
+}
+
+
+Bool XNVCTRLQueryTargetAttribute64 (
+    Display *dpy,
+    int target_type,
+    int target_id,
+    unsigned int display_mask,
+    unsigned int attribute,
+    int64_t *value
+){
+    XExtDisplayInfo *info = find_display(dpy);
+    xnvCtrlQueryAttribute64Reply rep;
+    xnvCtrlQueryAttributeReq *req;
+    Bool exists;
+
+    if (!XextHasExtension(info))
+        return False;
+
+    XNVCTRLCheckExtension(dpy, info, False);
+    XNVCTRLCheckTargetData(dpy, info, &target_type, &target_id);
+
+    LockDisplay(dpy);
+    GetReq(nvCtrlQueryAttribute, req);
+    req->reqType = info->codes->major_opcode;
+    req->nvReqType = X_nvCtrlQueryAttribute64;
+    req->target_type = target_type;
+    req->target_id = target_id;
+    req->display_mask = display_mask;
+    req->attribute = attribute;
+    if (!_XReply(dpy, (xReply *)&rep, 0, xTrue)) {
+        UnlockDisplay(dpy);
+        SyncHandle();
+        return False;
+    }
+    exists = rep.flags;
+    if (exists && value) *value = rep.value_64;
+    UnlockDisplay(dpy);
+    SyncHandle();
+    return exists;
+}
+
+
+Bool XNVCTRLQueryTargetStringAttribute (
+    Display *dpy,
+    int target_type,
+    int target_id,
+    unsigned int display_mask,
+    unsigned int attribute,
+    char **ptr
+){
+    XExtDisplayInfo *info = find_display (dpy);
+    xnvCtrlQueryStringAttributeReply rep;
+    xnvCtrlQueryStringAttributeReq   *req;
+    Bool exists;
+    int length, numbytes, slop;
+
+    if (!ptr) return False;
+
+    if(!XextHasExtension(info))
+        return False;
+
+    XNVCTRLCheckExtension (dpy, info, False);
+    XNVCTRLCheckTargetData(dpy, info, &target_type, &target_id);
+
+    LockDisplay (dpy);
+    GetReq (nvCtrlQueryStringAttribute, req);
+    req->reqType = info->codes->major_opcode;
+    req->nvReqType = X_nvCtrlQueryStringAttribute;
+    req->target_type = target_type;
+    req->target_id = target_id;
+    req->display_mask = display_mask;
+    req->attribute = attribute;
+    if (!_XReply (dpy, (xReply *) &rep, 0, False)) {
+        UnlockDisplay (dpy);
+        SyncHandle ();
+        return False;
+    }
+    length = rep.length;
+    numbytes = rep.n;
+    slop = numbytes & 3;
+    exists = rep.flags;
+    if (exists) {
+        *ptr = (char *) Xmalloc(numbytes);
+    }
+    if (!exists || !*ptr) {
+        _XEatData(dpy, length);
+        UnlockDisplay (dpy);
+        SyncHandle ();
+        return False;
+    } else {
+        _XRead(dpy, (char *) *ptr, numbytes);
+        if (slop) _XEatData(dpy, 4-slop);
+    }
+    UnlockDisplay (dpy);
+    SyncHandle ();
+    return exists;
+}
+
+Bool XNVCTRLQueryStringAttribute (
+    Display *dpy,
+    int screen,
+    unsigned int display_mask,
+    unsigned int attribute,
+    char **ptr
+){
+    return XNVCTRLQueryTargetStringAttribute(dpy, NV_CTRL_TARGET_TYPE_X_SCREEN,
+                                             screen, display_mask,
+                                             attribute, ptr);
+}
+
+
+Bool XNVCTRLSetTargetStringAttribute (
+    Display *dpy,
+    int target_type,
+    int target_id,
+    unsigned int display_mask,
+    unsigned int attribute,
+    char *ptr
+){
+    XExtDisplayInfo *info = find_display (dpy);
+    xnvCtrlSetStringAttributeReq *req;
+    xnvCtrlSetStringAttributeReply rep;
+    int size;
+    Bool success;
+    
+    if(!XextHasExtension(info))
+        return False;
+
+    XNVCTRLCheckExtension (dpy, info, False);
+
+    size = strlen(ptr)+1;
+
+    LockDisplay (dpy);
+    GetReq (nvCtrlSetStringAttribute, req);
+    req->reqType = info->codes->major_opcode;
+    req->nvReqType = X_nvCtrlSetStringAttribute;
+    req->target_type = target_type;
+    req->target_id = target_id;
+    req->display_mask = display_mask;
+    req->attribute = attribute;
+    req->length += ((size + 3) & ~3) >> 2;
+    req->num_bytes = size;
+    Data(dpy, ptr, size);
+    
+    if (!_XReply (dpy, (xReply *) &rep, 0, False)) {
+        UnlockDisplay (dpy);
+        SyncHandle ();
+        return False;
+    }
+    UnlockDisplay (dpy);
+    SyncHandle ();
+    
+    success = rep.flags;
+    return success;
+}
+
+Bool XNVCTRLSetStringAttribute (
+    Display *dpy,
+    int screen,
+    unsigned int display_mask,
+    unsigned int attribute,
+    char *ptr
+){
+    return XNVCTRLSetTargetStringAttribute(dpy, NV_CTRL_TARGET_TYPE_X_SCREEN,
+                                           screen, display_mask,
+                                           attribute, ptr);
+}
+
+
+static Bool XNVCTRLQueryValidTargetAttributeValues32 (
+    Display *dpy,
+    XExtDisplayInfo *info,
+    int target_type,
+    int target_id,
+    unsigned int display_mask,
+    unsigned int attribute,                                 
+    NVCTRLAttributeValidValuesRec *values
+){
+    xnvCtrlQueryValidAttributeValuesReply rep;
+    xnvCtrlQueryValidAttributeValuesReq   *req;
+    Bool exists;
+
+    LockDisplay (dpy);
+    GetReq (nvCtrlQueryValidAttributeValues, req);
+    req->reqType = info->codes->major_opcode;
+    req->nvReqType = X_nvCtrlQueryValidAttributeValues;
+    req->target_type = target_type;
+    req->target_id = target_id;
+    req->display_mask = display_mask;
+    req->attribute = attribute;
+    if (!_XReply (dpy, (xReply *) &rep, 0, xTrue)) {
+        UnlockDisplay (dpy);
+        SyncHandle ();
+        return False;
+    }
+    exists = rep.flags;
+    if (exists) {
+        values->type = rep.attr_type;
+        if (rep.attr_type == ATTRIBUTE_TYPE_RANGE) {
+            values->u.range.min = rep.min;
+            values->u.range.max = rep.max;
+        }
+        if (rep.attr_type == ATTRIBUTE_TYPE_INT_BITS) {
+            values->u.bits.ints = rep.bits;
+        }
+        values->permissions = rep.perms;
+    }
+    UnlockDisplay (dpy);
+    SyncHandle ();
+    return exists;
+}
+
+
+Bool XNVCTRLQueryValidTargetStringAttributeValues (
+    Display *dpy,
+    int target_type,
+    int target_id,
+    unsigned int display_mask,
+    unsigned int attribute,
+    NVCTRLAttributeValidValuesRec *values
+){
+    XExtDisplayInfo *info = find_display(dpy);
+    Bool exists;
+    xnvCtrlQueryValidAttributeValuesReply rep;
+    xnvCtrlQueryValidAttributeValuesReq   *req;
+
+    if (!values) return False;
+
+    if (!XextHasExtension(info))
+        return False;
+
+    XNVCTRLCheckExtension(dpy, info, False);
+
+    LockDisplay(dpy);
+    GetReq (nvCtrlQueryValidAttributeValues, req);
+    req->reqType = info->codes->major_opcode;
+    req->nvReqType = X_nvCtrlQueryValidStringAttributeValues;
+    req->target_type = target_type;
+    req->target_id = target_id;
+    req->display_mask = display_mask;
+    req->attribute = attribute;
+    if (!_XReply(dpy, (xReply *)&rep, 0, xTrue)) {
+        UnlockDisplay(dpy);
+        SyncHandle();
+        return False;
+    }
+    exists = rep.flags;
+    if (exists) {
+        values->type = rep.attr_type;
+        values->permissions = rep.perms;
+    }
+    UnlockDisplay(dpy);
+    SyncHandle();
+    return exists;
+}
+
+
+static Bool XNVCTRLQueryValidTargetAttributeValues64 (
+    Display *dpy,
+    XExtDisplayInfo *info,
+    int target_type,
+    int target_id,
+    unsigned int display_mask,
+    unsigned int attribute,
+    NVCTRLAttributeValidValuesRec *values
+){
+    xnvCtrlQueryValidAttributeValues64Reply rep;
+    xnvCtrlQueryValidAttributeValuesReq *req;
+    Bool exists;
+
+    LockDisplay(dpy);
+    GetReq(nvCtrlQueryValidAttributeValues, req);
+    req->reqType = info->codes->major_opcode;
+    req->nvReqType = X_nvCtrlQueryValidAttributeValues64;
+    req->target_type = target_type;
+    req->target_id = target_id;
+    req->display_mask = display_mask;
+    req->attribute = attribute;
+    if (!_XReply(dpy, (xReply *)&rep,
+                 sz_xnvCtrlQueryValidAttributeValues64Reply_extra,
+                 xTrue)) {
+        UnlockDisplay(dpy);
+        SyncHandle();
+        return False;
+    }
+    exists = rep.flags;
+    if (exists) {
+        values->type = rep.attr_type;
+        if (rep.attr_type == ATTRIBUTE_TYPE_RANGE) {
+            values->u.range.min = rep.min_64;
+            values->u.range.max = rep.max_64;
+        }
+        if (rep.attr_type == ATTRIBUTE_TYPE_INT_BITS) {
+            values->u.bits.ints = rep.bits_64;
+        }
+        values->permissions = rep.perms;
+    }
+    UnlockDisplay(dpy);
+    SyncHandle();
+    return exists;
+}
+
+Bool XNVCTRLQueryValidTargetAttributeValues (
+    Display *dpy,
+    int target_type,
+    int target_id,
+    unsigned int display_mask,
+    unsigned int attribute,
+    NVCTRLAttributeValidValuesRec *values
+){
+    XExtDisplayInfo *info = find_display(dpy);
+    Bool exists;
+    uintptr_t flags;
+
+    if (!values) return False;
+
+    if (!XextHasExtension(info))
+        return False;
+
+    XNVCTRLCheckExtension(dpy, info, False);
+    XNVCTRLCheckTargetData(dpy, info, &target_type, &target_id);
+
+    flags = version_flags(dpy,info);
+
+    if (!(flags & NVCTRL_EXT_EXISTS))
+        return False;
+
+    if (flags & NVCTRL_EXT_64_BIT_ATTRIBUTES) {
+        exists = XNVCTRLQueryValidTargetAttributeValues64(dpy, info,
+                                                          target_type,
+                                                          target_id,
+                                                          display_mask,
+                                                          attribute,
+                                                          values);
+    } else {
+        exists = XNVCTRLQueryValidTargetAttributeValues32(dpy, info,
+                                                          target_type,
+                                                          target_id,
+                                                          display_mask,
+                                                          attribute,
+                                                          values);
+    }
+    return exists;
+}
+
+
+Bool XNVCTRLQueryValidAttributeValues (
+    Display *dpy,
+    int screen,
+    unsigned int display_mask,
+    unsigned int attribute,
+    NVCTRLAttributeValidValuesRec *values
+){
+    return XNVCTRLQueryValidTargetAttributeValues(dpy,
+                                                  NV_CTRL_TARGET_TYPE_X_SCREEN,
+                                                  screen, display_mask,
+                                                  attribute, values);
+}
+
+
+static Bool QueryAttributePermissionsInternal (
+    Display *dpy,
+    unsigned int attribute,
+    NVCTRLAttributePermissionsRec *permissions,
+    unsigned int reqType
+){
+    XExtDisplayInfo *info = find_display (dpy);
+    xnvCtrlQueryAttributePermissionsReply rep;
+    xnvCtrlQueryAttributePermissionsReq *req;
+    Bool exists;
+
+    if(!XextHasExtension(info))
+        return False;
+
+    XNVCTRLCheckExtension (dpy, info, False);
+
+    LockDisplay(dpy);
+    GetReq(nvCtrlQueryAttributePermissions, req);
+    req->reqType = info->codes->major_opcode;
+    req->nvReqType = reqType;
+    req->attribute = attribute;
+    if (!_XReply (dpy, (xReply *) &rep, 0, xTrue)) {
+        UnlockDisplay (dpy);
+        SyncHandle();
+        return False;
+    }
+    exists = rep.flags;
+    if (exists && permissions) {
+        permissions->type = rep.attr_type;
+        permissions->permissions = rep.perms;
+    }
+    UnlockDisplay(dpy);
+    SyncHandle();
+    return exists;
+}
+
+
+Bool XNVCTRLQueryAttributePermissions (
+    Display *dpy,
+    unsigned int attribute,
+    NVCTRLAttributePermissionsRec *permissions
+){
+    return QueryAttributePermissionsInternal(dpy,
+                                             attribute,
+                                             permissions,
+                                             X_nvCtrlQueryAttributePermissions);
+}
+
+
+Bool XNVCTRLQueryStringAttributePermissions (
+    Display *dpy,
+    unsigned int attribute,
+    NVCTRLAttributePermissionsRec *permissions
+){
+    return QueryAttributePermissionsInternal(dpy,
+                                             attribute,
+                                             permissions,
+                                             X_nvCtrlQueryStringAttributePermissions);
+}
+
+
+Bool XNVCTRLQueryBinaryDataAttributePermissions (
+    Display *dpy,
+    unsigned int attribute,
+    NVCTRLAttributePermissionsRec *permissions
+){
+    return QueryAttributePermissionsInternal(dpy,
+                                             attribute,
+                                             permissions,
+                                             X_nvCtrlQueryBinaryDataAttributePermissions);
+}
+
+
+Bool XNVCTRLQueryStringOperationAttributePermissions (
+    Display *dpy,
+    unsigned int attribute,
+    NVCTRLAttributePermissionsRec *permissions
+){
+    return QueryAttributePermissionsInternal(dpy,
+                                             attribute,
+                                             permissions,
+                                             X_nvCtrlQueryStringOperationAttributePermissions);
+}
+
+
+void XNVCTRLSetGvoColorConversion (
+    Display *dpy,
+    int screen,
+    float colorMatrix[3][3],
+    float colorOffset[3],
+    float colorScale[3]
+){
+    XExtDisplayInfo *info = find_display (dpy);
+    xnvCtrlSetGvoColorConversionReq *req;
+
+    XNVCTRLSimpleCheckExtension (dpy, info);
+
+    LockDisplay (dpy);
+    GetReq (nvCtrlSetGvoColorConversion, req);
+    req->reqType = info->codes->major_opcode;
+    req->nvReqType = X_nvCtrlSetGvoColorConversion;
+    req->screen = screen;
+
+    req->cscMatrix_y_r = colorMatrix[0][0];
+    req->cscMatrix_y_g = colorMatrix[0][1];
+    req->cscMatrix_y_b = colorMatrix[0][2];
+
+    req->cscMatrix_cr_r = colorMatrix[1][0];
+    req->cscMatrix_cr_g = colorMatrix[1][1];
+    req->cscMatrix_cr_b = colorMatrix[1][2];
+
+    req->cscMatrix_cb_r = colorMatrix[2][0];
+    req->cscMatrix_cb_g = colorMatrix[2][1];
+    req->cscMatrix_cb_b = colorMatrix[2][2];
+
+    req->cscOffset_y  = colorOffset[0];
+    req->cscOffset_cr = colorOffset[1];
+    req->cscOffset_cb = colorOffset[2];
+
+    req->cscScale_y  = colorScale[0];
+    req->cscScale_cr = colorScale[1];
+    req->cscScale_cb = colorScale[2];
+
+    UnlockDisplay (dpy);
+    SyncHandle ();
+}
+
+
+Bool XNVCTRLQueryGvoColorConversion (
+    Display *dpy,
+    int screen,
+    float colorMatrix[3][3],
+    float colorOffset[3],
+    float colorScale[3]
+){
+    XExtDisplayInfo *info = find_display (dpy);
+    xnvCtrlQueryGvoColorConversionReply rep;
+    xnvCtrlQueryGvoColorConversionReq *req;
+
+    if(!XextHasExtension(info))
+        return False;
+
+    XNVCTRLCheckExtension (dpy, info, False);
+
+    LockDisplay (dpy);
+
+    GetReq (nvCtrlQueryGvoColorConversion, req);
+    req->reqType = info->codes->major_opcode;
+    req->nvReqType = X_nvCtrlQueryGvoColorConversion;
+    req->screen = screen;
+
+    if (!_XReply(dpy, (xReply *) &rep, 0, xFalse)) {
+        UnlockDisplay (dpy);
+        SyncHandle ();
+        return False;
+    }
+
+    _XRead(dpy, (char *)(colorMatrix), 36);
+    _XRead(dpy, (char *)(colorOffset), 12);
+    _XRead(dpy, (char *)(colorScale), 12);
+
+    UnlockDisplay (dpy);
+    SyncHandle ();
+
+    return True;
+}
+
+
+Bool XNVCtrlSelectTargetNotify (
+    Display *dpy,
+    int target_type,
+    int target_id,
+    int notify_type,
+    Bool onoff
+){
+    XExtDisplayInfo *info = find_display (dpy);
+    xnvCtrlSelectTargetNotifyReq *req;
+
+    if(!XextHasExtension (info))
+        return False;
+
+    XNVCTRLCheckExtension (dpy, info, False);
+
+    LockDisplay (dpy);
+    GetReq (nvCtrlSelectTargetNotify, req);
+    req->reqType = info->codes->major_opcode;
+    req->nvReqType = X_nvCtrlSelectTargetNotify;
+    req->target_type = target_type;
+    req->target_id = target_id;
+    req->notifyType = notify_type;
+    req->onoff = onoff;
+    UnlockDisplay (dpy);
+    SyncHandle ();
+
+    return True;
+}
+
+
+Bool XNVCtrlSelectNotify (
+    Display *dpy,
+    int screen,
+    int type,
+    Bool onoff
+){
+    XExtDisplayInfo *info = find_display (dpy);
+    xnvCtrlSelectNotifyReq *req;
+
+    if(!XextHasExtension (info))
+        return False;
+
+    XNVCTRLCheckExtension (dpy, info, False);
+
+    LockDisplay (dpy);
+    GetReq (nvCtrlSelectNotify, req);
+    req->reqType = info->codes->major_opcode;
+    req->nvReqType = X_nvCtrlSelectNotify;
+    req->screen = screen;
+    req->notifyType = type;
+    req->onoff = onoff;
+    UnlockDisplay (dpy);
+    SyncHandle ();
+
+    return True;
+}
+
+Bool XNVCTRLQueryTargetBinaryData (
+    Display *dpy,
+    int target_type,
+    int target_id,
+    unsigned int display_mask,
+    unsigned int attribute,
+    unsigned char **ptr,
+    int *len
+){
+    XExtDisplayInfo *info = find_display (dpy);
+    xnvCtrlQueryBinaryDataReply rep;
+    xnvCtrlQueryBinaryDataReq   *req;
+    Bool exists;
+    int length, numbytes, slop;
+
+    if (!ptr) return False;
+
+    if(!XextHasExtension(info))
+        return False;
+
+    XNVCTRLCheckExtension (dpy, info, False);
+    XNVCTRLCheckTargetData(dpy, info, &target_type, &target_id);
+
+    LockDisplay (dpy);
+    GetReq (nvCtrlQueryBinaryData, req);
+    req->reqType = info->codes->major_opcode;
+    req->nvReqType = X_nvCtrlQueryBinaryData;
+    req->target_type = target_type;
+    req->target_id = target_id;
+    req->display_mask = display_mask;
+    req->attribute = attribute;
+    if (!_XReply (dpy, (xReply *) &rep, 0, False)) {
+        UnlockDisplay (dpy);
+        SyncHandle ();
+        return False;
+    }
+    length = rep.length;
+    numbytes = rep.n;
+    slop = numbytes & 3;
+    exists = rep.flags;
+    if (exists) {
+        *ptr = (unsigned char *) Xmalloc(numbytes);
+    }
+    if (!exists || !*ptr) {
+        _XEatData(dpy, length);
+        UnlockDisplay (dpy);
+        SyncHandle ();
+        return False;
+    } else {
+        _XRead(dpy, (char *) *ptr, numbytes);
+        if (slop) _XEatData(dpy, 4-slop);
+    }
+    if (len) *len = numbytes;
+    UnlockDisplay (dpy);
+    SyncHandle ();
+    return exists;
+}
+
+Bool XNVCTRLQueryBinaryData (
+    Display *dpy,
+    int screen,
+    unsigned int display_mask,
+    unsigned int attribute,
+    unsigned char **ptr,
+    int *len
+){
+    return XNVCTRLQueryTargetBinaryData(dpy, NV_CTRL_TARGET_TYPE_X_SCREEN,
+                                        screen, display_mask,
+                                        attribute, ptr, len);
+}
+
+Bool XNVCTRLStringOperation (
+    Display *dpy,
+    int target_type,
+    int target_id,
+    unsigned int display_mask,
+    unsigned int attribute,
+    char *pIn,
+    char **ppOut
+) {
+    XExtDisplayInfo *info = find_display(dpy);
+    xnvCtrlStringOperationReq *req;
+    xnvCtrlStringOperationReply rep;
+    Bool ret;
+    int inSize, outSize, length, slop;
+
+    if (!XextHasExtension(info))
+        return False;
+    
+    if (!ppOut)
+        return False;
+
+    *ppOut = NULL;
+    
+    XNVCTRLCheckExtension(dpy, info, False);
+    XNVCTRLCheckTargetData(dpy, info, &target_type, &target_id);
+    
+    if (pIn) {
+        inSize = strlen(pIn) + 1;
+    } else {
+        inSize = 0;
+    }
+    
+    LockDisplay(dpy);
+    GetReq(nvCtrlStringOperation, req);
+    
+    req->reqType = info->codes->major_opcode;
+    req->nvReqType = X_nvCtrlStringOperation;
+    req->target_type = target_type;
+    req->target_id = target_id;
+    req->display_mask = display_mask;
+    req->attribute = attribute;
+
+    req->length += ((inSize + 3) & ~3) >> 2;
+    req->num_bytes = inSize;
+    
+    if (pIn) {
+        Data(dpy, pIn, inSize);
+    }
+    
+    if (!_XReply (dpy, (xReply *) &rep, 0, False)) {
+        UnlockDisplay(dpy);
+        SyncHandle();
+        return False;
+    }
+    
+    length = rep.length;
+    outSize = rep.num_bytes;
+    slop = outSize & 3;
+
+    if (outSize) *ppOut = (char *) Xmalloc(outSize);
+    
+    if (!*ppOut) {
+        _XEatData(dpy, length);
+    } else {
+        _XRead(dpy, (char *) *ppOut, outSize);
+        if (slop) _XEatData(dpy, 4-slop);
+    }
+    
+    ret = rep.ret;
+    
+    UnlockDisplay(dpy);
+    SyncHandle();
+    
+    return ret;
+}
+
+
+static Bool wire_to_event (Display *dpy, XEvent *host, xEvent *wire)
+{
+    XExtDisplayInfo *info = find_display (dpy);
+    XNVCtrlEvent *re;
+    xnvctrlEvent *event;
+    XNVCtrlEventTarget *reTarget;
+    xnvctrlEventTarget *eventTarget;
+    XNVCtrlEventTargetAvailability *reTargetAvailability;
+    XNVCtrlStringEventTarget *reTargetString;
+    XNVCtrlBinaryEventTarget *reTargetBinary;
+
+    XNVCTRLCheckExtension (dpy, info, False);
+    
+    switch ((wire->u.u.type & 0x7F) - info->codes->first_event) {
+    case ATTRIBUTE_CHANGED_EVENT:
+        re = (XNVCtrlEvent *) host;
+        event = (xnvctrlEvent *) wire;
+        re->attribute_changed.type = event->u.u.type & 0x7F;
+        re->attribute_changed.serial =
+            _XSetLastRequestRead(dpy, (xGenericReply*) event);
+        re->attribute_changed.send_event = ((event->u.u.type & 0x80) != 0);
+        re->attribute_changed.display = dpy;
+        re->attribute_changed.time = event->u.attribute_changed.time;
+        re->attribute_changed.screen = event->u.attribute_changed.screen;
+        re->attribute_changed.display_mask =
+            event->u.attribute_changed.display_mask;
+        re->attribute_changed.attribute = event->u.attribute_changed.attribute;
+        re->attribute_changed.value = event->u.attribute_changed.value;
+        break;
+    case TARGET_ATTRIBUTE_CHANGED_EVENT:
+        reTarget = (XNVCtrlEventTarget *) host;
+        eventTarget = (xnvctrlEventTarget *) wire;
+        reTarget->attribute_changed.type = eventTarget->u.u.type & 0x7F;
+        reTarget->attribute_changed.serial =
+            _XSetLastRequestRead(dpy, (xGenericReply*) eventTarget);
+        reTarget->attribute_changed.send_event =
+            ((eventTarget->u.u.type & 0x80) != 0);
+        reTarget->attribute_changed.display = dpy;
+        reTarget->attribute_changed.time =
+            eventTarget->u.attribute_changed.time;
+        reTarget->attribute_changed.target_type =
+            eventTarget->u.attribute_changed.target_type;
+        reTarget->attribute_changed.target_id =
+            eventTarget->u.attribute_changed.target_id;
+        reTarget->attribute_changed.display_mask =
+            eventTarget->u.attribute_changed.display_mask;
+        reTarget->attribute_changed.attribute =
+            eventTarget->u.attribute_changed.attribute;
+        reTarget->attribute_changed.value =
+            eventTarget->u.attribute_changed.value;
+        break;
+    case TARGET_ATTRIBUTE_AVAILABILITY_CHANGED_EVENT:
+        reTargetAvailability = (XNVCtrlEventTargetAvailability *) host;
+        eventTarget = (xnvctrlEventTarget *) wire;
+        reTargetAvailability->attribute_changed.type =
+            eventTarget->u.u.type & 0x7F;
+        reTargetAvailability->attribute_changed.serial =
+            _XSetLastRequestRead(dpy, (xGenericReply*) eventTarget);
+        reTargetAvailability->attribute_changed.send_event =
+            ((eventTarget->u.u.type & 0x80) != 0);
+        reTargetAvailability->attribute_changed.display = dpy;
+        reTargetAvailability->attribute_changed.time =
+            eventTarget->u.availability_changed.time;
+        reTargetAvailability->attribute_changed.target_type =
+            eventTarget->u.availability_changed.target_type;
+        reTargetAvailability->attribute_changed.target_id =
+            eventTarget->u.availability_changed.target_id;
+        reTargetAvailability->attribute_changed.display_mask =
+            eventTarget->u.availability_changed.display_mask;
+        reTargetAvailability->attribute_changed.attribute =
+            eventTarget->u.availability_changed.attribute;
+        reTargetAvailability->attribute_changed.availability =
+            eventTarget->u.availability_changed.availability;
+        reTargetAvailability->attribute_changed.value =
+            eventTarget->u.availability_changed.value;
+        break;
+    case TARGET_STRING_ATTRIBUTE_CHANGED_EVENT:
+        reTargetString = (XNVCtrlStringEventTarget *) host;
+        eventTarget = (xnvctrlEventTarget *) wire;
+        reTargetString->attribute_changed.type = eventTarget->u.u.type & 0x7F;
+        reTargetString->attribute_changed.serial =
+            _XSetLastRequestRead(dpy, (xGenericReply*) eventTarget);
+        reTargetString->attribute_changed.send_event =
+            ((eventTarget->u.u.type & 0x80) != 0);
+        reTargetString->attribute_changed.display = dpy;
+        reTargetString->attribute_changed.time =
+            eventTarget->u.attribute_changed.time;
+        reTargetString->attribute_changed.target_type =
+            eventTarget->u.attribute_changed.target_type;
+        reTargetString->attribute_changed.target_id =
+            eventTarget->u.attribute_changed.target_id;
+        reTargetString->attribute_changed.display_mask =
+            eventTarget->u.attribute_changed.display_mask;
+        reTargetString->attribute_changed.attribute =
+            eventTarget->u.attribute_changed.attribute;
+        break;
+    case TARGET_BINARY_ATTRIBUTE_CHANGED_EVENT:
+        reTargetBinary = (XNVCtrlBinaryEventTarget *) host;
+        eventTarget = (xnvctrlEventTarget *) wire;
+        reTargetBinary->attribute_changed.type = eventTarget->u.u.type & 0x7F;
+        reTargetBinary->attribute_changed.serial =
+            _XSetLastRequestRead(dpy, (xGenericReply*) eventTarget);
+        reTargetBinary->attribute_changed.send_event =
+            ((eventTarget->u.u.type & 0x80) != 0);
+        reTargetBinary->attribute_changed.display = dpy;
+        reTargetBinary->attribute_changed.time =
+            eventTarget->u.attribute_changed.time;
+        reTargetBinary->attribute_changed.target_type =
+            eventTarget->u.attribute_changed.target_type;
+        reTargetBinary->attribute_changed.target_id =
+            eventTarget->u.attribute_changed.target_id;
+        reTargetBinary->attribute_changed.display_mask =
+            eventTarget->u.attribute_changed.display_mask;
+        reTargetBinary->attribute_changed.attribute =
+            eventTarget->u.attribute_changed.attribute;
+        break;
+
+    default:
+        return False;
+    }
+
+    return True;
+}
+

src/third_party/libXNVCtrl/NVCtrlLib.h

+/*
+ * Copyright (c) 2008 NVIDIA, Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef __NVCTRLLIB_H
+#define __NVCTRLLIB_H
+
+#include "NVCtrl.h"
+
+#if defined __cplusplus
+extern "C" {
+#endif
+
+/*
+ *  XNVCTRLQueryExtension -
+ *
+ *  Returns True if the extension exists, returns False otherwise.
+ *  event_basep and error_basep are the extension event and error
+ *  bases.  Currently, no extension specific errors or events are
+ *  defined.
+ */
+
+Bool XNVCTRLQueryExtension(Display *dpy, int *event_basep, int *error_basep);
+
+/*
+ *  XNVCTRLQueryVersion -
+ *
+ *  Returns True if the extension exists, returns False otherwise.
+ *  major and minor are the extension's major and minor version
+ *  numbers.
+ */
+
+Bool XNVCTRLQueryVersion(Display *dpy, int *major, int *minor);
+
+/*
+ *  XNVCTRLIsNvScreen
+ *
+ *  Returns True is the specified screen is controlled by the NVIDIA
+ *  driver.  Returns False otherwise.
+ */
+
+Bool XNVCTRLIsNvScreen(Display *dpy, int screen);
+
+/*
+ *  XNVCTRLQueryTargetCount -
+ *
+ *  Returns True if the target type exists.  Returns False otherwise.
+ *  If XNVCTRLQueryTargetCount returns True, value will contain the
+ *  count of existing targets on the server of the specified target
+ *  type.
+ *
+ *  Please see "Attribute Targets" in NVCtrl.h for the list of valid
+ *  target types.
+ *
+ *  Possible errors:
+ *     BadValue - The target doesn't exist.
+ */
+
+Bool XNVCTRLQueryTargetCount(Display *dpy, int target_type, int *value);
+
+/*
+ *  XNVCTRLSetAttribute -
+ *
+ *  Sets the attribute to the given value.  The attributes and their
+ *  possible values are listed in NVCtrl.h.
+ *
+ *  Not all attributes require the display_mask parameter; see
+ *  NVCtrl.h for details.
+ *
+ *  Calling this function is equivalent to calling XNVCTRLSetTargetAttribute()
+ *  with the target_type set to NV_CTRL_TARGET_TYPE_X_SCREEN and
+ *  target_id set to 'screen'.
+ *
+ *  Possible errors:
+ *     BadValue - The screen or attribute doesn't exist.
+ *     BadMatch - The NVIDIA driver is not present on that screen.
+ */
+
+void XNVCTRLSetAttribute(Display *dpy,
+                         int screen,
+                         unsigned int display_mask,
+                         unsigned int attribute,
+                         int value);
+
+/*
+ *  XNVCTRLSetTargetAttribute -
+ *
+ *  Sets the attribute to the given value.  The attributes and their
+ *  possible values are listed in NVCtrl.h.
+ *
+ *  Not all attributes require the display_mask parameter; see
+ *  NVCtrl.h for details.
+ *
+ *  Possible errors:
+ *     BadValue - The target or attribute doesn't exist.
+ *     BadMatch - The NVIDIA driver is not present on that target.
+ */
+
+void XNVCTRLSetTargetAttribute(Display *dpy,
+                               int target_type,
+                               int target_id,
+                               unsigned int display_mask,
+                               unsigned int attribute,
+                               int value);
+
+/*
+ *  XNVCTRLSetAttributeAndGetStatus -
+ *
+ * Same as XNVCTRLSetAttribute().
+ * In addition, XNVCTRLSetAttributeAndGetStatus() returns
+ * True if the operation succeeds, False otherwise.
+ *
+ */
+
+Bool XNVCTRLSetAttributeAndGetStatus(Display *dpy,
+                                     int screen,
+                                     unsigned int display_mask,
+                                     unsigned int attribute,
+                                     int value);
+
+/*
+ *  XNVCTRLSetTargetAttributeAndGetStatus -
+ *
+ * Same as XNVCTRLSetTargetAttribute().
+ * In addition, XNVCTRLSetTargetAttributeAndGetStatus() returns
+ * True if the operation succeeds, False otherwise.
+ *
+ */
+
+Bool XNVCTRLSetTargetAttributeAndGetStatus(Display *dpy,
+                                           int target_type,
+                                           int target_id,
+                                           unsigned int display_mask,
+                                           unsigned int attribute,
+                                           int value);
+
+/*
+ *  XNVCTRLQueryAttribute -
+ *
+ *  Returns True if the attribute exists.  Returns False otherwise.
+ *  If XNVCTRLQueryAttribute returns True, value will contain the
+ *  value of the specified attribute.
+ *
+ *  Not all attributes require the display_mask parameter; see
+ *  NVCtrl.h for details.
+ *
+ *  Calling this function is equivalent to calling
+ *  XNVCTRLQueryTargetAttribute() with the target_type set to
+ *  NV_CTRL_TARGET_TYPE_X_SCREEN and target_id set to 'screen'.
+ *
+ *  Possible errors:
+ *     BadValue - The screen doesn't exist.
+ *     BadMatch - The NVIDIA driver is not present on that screen.
+ */
+
+Bool XNVCTRLQueryAttribute(Display *dpy,
+                           int screen,
+                           unsigned int display_mask,
+                           unsigned int attribute,
+                           int *value);
+
+/*
+ * XNVCTRLQueryTargetAttribute -
+ *
+ *  Returns True if the attribute exists.  Returns False otherwise.
+ *  If XNVCTRLQueryTargetAttribute returns True, value will contain the
+ *  value of the specified attribute.
+ *
+ *  Not all attributes require the display_mask parameter; see
+ *  NVCtrl.h for details.
+ *
+ *  Possible errors:
+ *     BadValue - The target doesn't exist.
+ *     BadMatch - The NVIDIA driver does not control the target.
+ */
+
+Bool XNVCTRLQueryTargetAttribute(Display *dpy,
+                                 int target_Type,
+                                 int target_id,
+                                 unsigned int display_mask,
+                                 unsigned int attribute,
+                                 int *value);
+
+/*
+ * XNVCTRLQueryTargetAttribute64 -
+ *
+ *  Returns True if the attribute exists.  Returns False otherwise.
+ *  If XNVCTRLQueryTargetAttribute returns True, value will contain the
+ *  value of the specified attribute.
+ *
+ *  Not all attributes require the display_mask parameter; see
+ *  NVCtrl.h for details.
+ *
+ *  Note: this function behaves like XNVCTRLQueryTargetAttribute(),
+ *  but supports 64-bit integer attributes.
+ *
+ *  Possible errors:
+ *     BadValue - The target doesn't exist.
+ *     BadMatch - The NVIDIA driver does not control the target.
+ */
+
+Bool XNVCTRLQueryTargetAttribute64(Display *dpy,
+                                   int target_Type,
+                                   int target_id,
+                                   unsigned int display_mask,
+                                   unsigned int attribute,
+                                   int64_t *value);
+
+/*
+ *  XNVCTRLQueryStringAttribute -
+ *
+ *  Returns True if the attribute exists.  Returns False otherwise.
+ *  If XNVCTRLQueryStringAttribute returns True, *ptr will point to an
+ *  allocated string containing the string attribute requested.  It is
+ *  the caller's responsibility to free the string when done.
+ *
+ *  Calling this function is equivalent to calling
+ *  XNVCTRLQueryTargetStringAttribute() with the target_type set to
+ *  NV_CTRL_TARGET_TYPE_X_SCREEN and target_id set to 'screen'.
+ *
+ *  Possible errors:
+ *     BadValue - The screen doesn't exist.
+ *     BadMatch - The NVIDIA driver is not present on that screen.
+ *     BadAlloc - Insufficient resources to fulfill the request.
+ */
+
+Bool XNVCTRLQueryStringAttribute(Display *dpy,
+                                 int screen,
+                                 unsigned int display_mask,
+                                 unsigned int attribute,
+                                 char **ptr);
+
+/*
+ *  XNVCTRLQueryTargetStringAttribute -
+ *
+ *  Returns True if the attribute exists.  Returns False otherwise.
+ *  If XNVCTRLQueryTargetStringAttribute returns True, *ptr will point
+ *  to an allocated string containing the string attribute requested.
+ *  It is the caller's responsibility to free the string when done.
+ *
+ *  Possible errors:
+ *     BadValue - The target doesn't exist.
+ *     BadMatch - The NVIDIA driver does not control the target.
+ *     BadAlloc - Insufficient resources to fulfill the request.
+ */
+
+Bool XNVCTRLQueryTargetStringAttribute(Display *dpy,
+                                       int target_type,
+                                       int target_id,
+                                       unsigned int display_mask,
+                                       unsigned int attribute,
+                                       char **ptr);
+
+/*
+ *  XNVCTRLSetStringAttribute -
+ *
+ *  Returns True if the operation succeded.  Returns False otherwise.
+ *
+ *  Possible X errors:
+ *     BadValue - The screen doesn't exist.
+ *     BadMatch - The NVIDIA driver is not present on that screen.
+ *     BadAlloc - Insufficient resources to fulfill the request.
+ */
+
+Bool XNVCTRLSetStringAttribute(Display *dpy,
+                               int screen,
+                               unsigned int display_mask,
+                               unsigned int attribute,
+                               char *ptr);
+
+/*
+ *  XNVCTRLSetTargetStringAttribute -
+ *
+ *  Returns True if the operation succeded.  Returns False otherwise.
+ *
+ *  Possible X errors:
+ *     BadValue - The screen doesn't exist.
+ *     BadMatch - The NVIDIA driver is not present on that screen.
+ *     BadAlloc - Insufficient resources to fulfill the request.
+ */
+
+Bool XNVCTRLSetTargetStringAttribute(Display *dpy,
+                                     int target_type,
+                                     int target_id,
+                                     unsigned int display_mask,
+                                     unsigned int attribute,
+                                     char *ptr);
+
+/*
+ * XNVCTRLQueryValidAttributeValues -
+ *
+ * Returns True if the attribute exists.  Returns False otherwise.  If
+ * XNVCTRLQueryValidAttributeValues returns True, values will indicate
+ * the valid values for the specified attribute; see the description
+ * of NVCTRLAttributeValidValues in NVCtrl.h.
+ *
+ *  Calling this function is equivalent to calling
+ *  XNVCTRLQueryValidTargetAttributeValues() with the target_type set to
+ *  NV_CTRL_TARGET_TYPE_X_SCREEN and target_id set to 'screen'.
+ */
+
+Bool XNVCTRLQueryValidAttributeValues(Display *dpy,
+                                      int screen,
+                                      unsigned int display_mask,
+                                      unsigned int attribute,
+                                      NVCTRLAttributeValidValuesRec *values);
+
+/*
+ * XNVCTRLQueryValidTargetAttributeValues -
+ *
+ * Returns True if the attribute exists.  Returns False otherwise.  If
+ * XNVCTRLQueryValidTargetAttributeValues returns True, values will indicate
+ * the valid values for the specified attribute.
+ */
+
+Bool XNVCTRLQueryValidTargetAttributeValues(Display *dpy,
+                                            int target_type,
+                                            int target_id,
+                                            unsigned int display_mask,
+                                            unsigned int attribute,
+                                            NVCTRLAttributeValidValuesRec *values);
+
+/*
+ * XNVCTRLQueryValidTargetStringAttributeValues -
+ *
+ * Returns True if the attribute exists.  Returns False otherwise.  If
+ * XNVCTRLQueryValidTargetStringAttributeValues returns True, values will
+ * indicate the valid values for the specified attribute.
+ */
+
+Bool XNVCTRLQueryValidTargetStringAttributeValues(Display *dpy,
+                                                  int target_type,
+                                                  int target_id,
+                                                  unsigned int display_mask,
+                                                  unsigned int attribute,
+                                                  NVCTRLAttributeValidValuesRec *values);
+
+/*
+ * XNVCTRLQueryAttributePermissions -
+ *
+ * Returns True if the attribute exists.  Returns False otherwise.  If
+ * XNVCTRLQueryAttributePermissions returns True, permissions will
+ * indicate the permission flags for the attribute.
+ */
+
+Bool XNVCTRLQueryAttributePermissions(Display *dpy,
+                                      unsigned int attribute,
+                                      NVCTRLAttributePermissionsRec *permissions);
+
+/*
+ * XNVCTRLQueryStringAttributePermissions -
+ *
+ * Returns True if the attribute exists.  Returns False otherwise.  If
+ * XNVCTRLQueryStringAttributePermissions returns True, permissions will
+ * indicate the permission flags for the attribute.
+ */
+
+Bool XNVCTRLQueryStringAttributePermissions(Display *dpy,
+                                            unsigned int attribute,
+                                            NVCTRLAttributePermissionsRec *permissions);
+
+/*
+ * XNVCTRLQueryBinaryDataAttributePermissions -
+ *
+ * Returns True if the attribute exists.  Returns False otherwise.  If
+ * XNVCTRLQueryBinaryDataAttributePermissions returns True, permissions
+ * will indicate the permission flags for the attribute.
+ */
+
+Bool XNVCTRLQueryBinaryDataAttributePermissions(Display *dpy,
+                                                unsigned int attribute,
+                                                NVCTRLAttributePermissionsRec *permissions);
+
+/*
+ * XNVCTRLQueryStringOperationAttributePermissions -
+ *
+ * Returns True if the attribute exists.  Returns False otherwise.  If
+ * XNVCTRLQueryStringOperationAttributePermissions returns True,
+ * permissions will indicate the permission flags for the attribute.
+ */
+
+Bool XNVCTRLQueryStringOperationAttributePermissions(Display *dpy,
+                                                     unsigned int attribute,
+                                                     NVCTRLAttributePermissionsRec *permissions);
+
+/*
+ *  XNVCTRLSetGvoColorConversion -
+ *
+ *  Sets the color conversion matrix, offset, and scale that should be
+ *  used for GVO (Graphic to Video Out).
+ *
+ *  The Color Space Conversion data is ordered like this:
+ *
+ *   colorMatrix[0][0] // r.Y
+ *   colorMatrix[0][1] // g.Y
+ *   colorMatrix[0][2] // b.Y
+ *
+ *   colorMatrix[1][0] // r.Cr
+ *   colorMatrix[1][1] // g.Cr
+ *   colorMatrix[1][2] // b.Cr
+ *
+ *   colorMatrix[2][0] // r.Cb
+ *   colorMatrix[2][1] // g.Cb
+ *   colorMatrix[2][2] // b.Cb
+ *
+ *   colorOffset[0]    // Y
+ *   colorOffset[1]    // Cr
+ *   colorOffset[2]    // Cb
+ *
+ *   colorScale[0]     // Y
+ *   colorScale[1]     // Cr
+ *   colorScale[2]     // Cb
+ *
+ *  where the data is used according to the following formulae:
+ *
+ *   Y  =  colorOffset[0] + colorScale[0] *
+ *           (R * colorMatrix[0][0] +
+ *            G * colorMatrix[0][1] +
+ *            B * colorMatrix[0][2]);
+ *
+ *   Cr =  colorOffset[1] + colorScale[1] *
+ *           (R * colorMatrix[1][0] +
+ *            G * colorMatrix[1][1] +
+ *            B * colorMatrix[1][2]);
+ *
+ *   Cb =  colorOffset[2] + colorScale[2] *
+ *           (R * colorMatrix[2][0] +
+ *            G * colorMatrix[2][1] +
+ *            B * colorMatrix[2][2]);
+ *
+ *  Possible errors:
+ *     BadMatch - The NVIDIA driver is not present on that screen.
+ *     BadImplementation - GVO is not available on that screen.
+ */
+
+void XNVCTRLSetGvoColorConversion(Display *dpy,
+                                  int screen,
+                                  float colorMatrix[3][3],
+                                  float colorOffset[3],
+                                  float colorScale[3]);
+
+/*
+ *  XNVCTRLQueryGvoColorConversion -
+ *
+ *  Retrieves the color conversion matrix and color offset
+ *  that are currently being used for GVO (Graphic to Video Out).
+ *
+ *  The values are ordered within the arrays according to the comments
+ *  for XNVCTRLSetGvoColorConversion().
+ *
+ *  Possible errors:
+ *     BadMatch - The NVIDIA driver is not present on that screen.
+ *     BadImplementation - GVO is not available on that screen.
+ */
+
+Bool XNVCTRLQueryGvoColorConversion(Display *dpy,
+                                    int screen,
+                                    float colorMatrix[3][3],
+                                    float colorOffset[3],
+                                    float colorScale[3]);
+
+/*
+ *  XNVCTRLQueryBinaryData -
+ *
+ *  Returns True if the attribute exists.  Returns False otherwise.
+ *  If XNVCTRLQueryBinaryData returns True, *ptr will point to an
+ *  allocated block of memory containing the binary data attribute
+ *  requested.  It is the caller's responsibility to free the data
+ *  when done.  len will list the length of the binary data.
+ *
+ *  Calling this function is equivalent to calling
+ *  XNVCTRLQueryTargetBinaryData() with the target_type set to
+ *  NV_CTRL_TARGET_TYPE_X_SCREEN and target_id set to 'screen'.
+ *
+ *  Possible errors:
+ *     BadValue - The screen doesn't exist.
+ *     BadMatch - The NVIDIA driver is not present on that screen.
+ *     BadAlloc - Insufficient resources to fulfill the request.
+ */
+
+Bool XNVCTRLQueryBinaryData(Display *dpy,
+                            int screen,
+                            unsigned int display_mask,
+                            unsigned int attribute,
+                            unsigned char **ptr,
+                            int *len);
+
+/*
+ * XNVCTRLQueryTargetBinaryData -
+ *
+ *  Returns True if the attribute exists.  Returns False otherwise.
+ *  If XNVCTRLQueryTargetBinaryData returns True, *ptr will point to an
+ *  allocated block of memory containing the binary data attribute
+ *  requested.  It is the caller's responsibility to free the data
+ *  when done.  len will list the length of the binary data.
+ *
+ *  Possible errors:
+ *     BadValue - The target doesn't exist.
+ *     BadMatch - The NVIDIA driver does not control the target.
+ *     BadAlloc - Insufficient resources to fulfill the request.
+ */
+
+Bool XNVCTRLQueryTargetBinaryData(Display *dpy,
+                                  int target_type,
+                                  int target_id,
+                                  unsigned int display_mask,
+                                  unsigned int attribute,
+                                  unsigned char **ptr,
+                                  int *len);
+
+/*
+ * XNVCTRLStringOperation -
+ *
+ * Takes a string as input and returns a Xmalloc'ed string as output.
+ * Returns True on success and False on failure.
+ */
+
+Bool XNVCTRLStringOperation(Display *dpy,
+                            int target_type,
+                            int target_id,
+                            unsigned int display_mask,
+                            unsigned int attribute,
+                            char *pIn,
+                            char **ppOut);
+
+/*
+ * XNVCtrlSelectNotify -
+ *
+ * This enables/disables receiving of NV-CONTROL events.  The type
+ * specifies the type of event to enable (currently, the only
+ * type that can be requested per-screen with XNVCtrlSelectNotify()
+ * is ATTRIBUTE_CHANGED_EVENT); onoff controls whether receiving this
+ * type of event should be enabled (True) or disabled (False).
+ *
+ * Returns True if successful, or False if the screen is not
+ * controlled by the NVIDIA driver.
+ */
+
+Bool XNVCtrlSelectNotify(Display *dpy, int screen, int type, Bool onoff);
+
+/*
+ * XNVCtrlSelectTargetNotify -
+ *
+ * This enables/disables receiving of NV-CONTROL events that happen on
+ * the specified target.  The notify_type specifies the type of event to
+ * enable (currently, the only type that can be requested per-target with
+ * XNVCtrlSelectTargetNotify() is TARGET_ATTRIBUTE_CHANGED_EVENT); onoff
+ * controls whether receiving this type of event should be enabled (True)
+ * or disabled (False).
+ *
+ * Returns True if successful, or False if the target is not
+ * controlled by the NVIDIA driver.
+ */
+
+Bool XNVCtrlSelectTargetNotify(Display *dpy,
+                               int target_type,
+                               int target_id,
+                               int notify_type,
+                               Bool onoff);
+
+/*
+ * XNVCtrlEvent structure
+ */
+
+typedef struct
+{
+    int type;
+    unsigned long serial;
+    Bool send_event; /* always FALSE, we don't allow send_events */
+    Display *display;
+    Time time;
+    int screen;
+    unsigned int display_mask;
+    unsigned int attribute;
+    int value;
+} XNVCtrlAttributeChangedEvent;
+
+typedef union
+{
+    int type;
+    XNVCtrlAttributeChangedEvent attribute_changed;
+    long pad[24];
+} XNVCtrlEvent;
+
+/*
+ * XNVCtrlEventTarget structure
+ */
+
+typedef struct
+{
+    int type;
+    unsigned long serial;
+    Bool send_event; /* always FALSE, we don't allow send_events */
+    Display *display;
+    Time time;
+    int target_type;
+    int target_id;
+    unsigned int display_mask;
+    unsigned int attribute;
+    int value;
+} XNVCtrlAttributeChangedEventTarget;
+
+typedef union
+{
+    int type;
+    XNVCtrlAttributeChangedEventTarget attribute_changed;
+    long pad[24];
+} XNVCtrlEventTarget;
+
+/*
+ * XNVCtrlEventTargetAvailability structure
+ */
+
+typedef struct
+{
+    int type;
+    unsigned long serial;
+    Bool send_event; /* always FALSE, we don't allow send_events */
+    Display *display;
+    Time time;
+    int target_type;
+    int target_id;
+    unsigned int display_mask;
+    unsigned int attribute;
+    int value;
+    Bool availability;
+} XNVCtrlAttributeChangedEventTargetAvailability;
+
+typedef union
+{
+    int type;
+    XNVCtrlAttributeChangedEventTargetAvailability attribute_changed;
+    long pad[24];
+} XNVCtrlEventTargetAvailability;
+
+/*
+ * XNVCtrlStringEventTarget structure
+ */
+
+typedef struct
+{
+    int type;
+    unsigned long serial;
+    Bool send_event; /* always FALSE, we don't allow send_events */
+    Display *display;
+    Time time;
+    int target_type;
+    int target_id;
+    unsigned int display_mask;
+    unsigned int attribute;
+} XNVCtrlStringAttributeChangedEventTarget;
+
+typedef union
+{
+    int type;
+    XNVCtrlStringAttributeChangedEventTarget attribute_changed;
+    long pad[24];
+} XNVCtrlStringEventTarget;
+
+/*
+ * XNVCtrlBinaryEventTarget structure
+ */
+
+typedef struct
+{
+    int type;
+    unsigned long serial;
+    Bool send_event; /* always FALSE, we don't allow send_events */
+    Display *display;
+    Time time;
+    int target_type;
+    int target_id;
+    unsigned int display_mask;
+    unsigned int attribute;
+} XNVCtrlBinaryAttributeChangedEventTarget;
+
+typedef union
+{
+    int type;
+    XNVCtrlBinaryAttributeChangedEventTarget attribute_changed;
+    long pad[24];
+} XNVCtrlBinaryEventTarget;
+
+#if defined __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* __NVCTRLLIB_H */

src/third_party/libXNVCtrl/README.angle

+Name: NVidia Control X Extension Library
+Short Name: libXNVCtrl
+URL: http://cgit.freedesktop.org/~aplattner/nvidia-settings/
+Version: unknown
+Date: 2008
+License: MIT
+Security Critical: no
+
+Description:
+This package provides access to NVidia Control X Extension. It is used to determine the version of the NVIDIA driver in use.
+
+The current version is pulled from nvidia-settings-302.17.
+
+Local Modifications:

src/third_party/libXNVCtrl/libXNVCtrl.gyp

+# Copyright (c) 2016 The ANGLE Project Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+{
+    'targets':
+    [{
+        'target_name': 'libXNVCtrl',
+        'type': 'static_library',
+        'sources':
+        [
+            'NVCtrl.c',
+            'NVCtrl.h',
+            'NVCtrlLib.h',
+            'nv_control.h',
+        ],
+    }],
+}

src/third_party/libXNVCtrl/nv_control.h

+/*
+ * Copyright (c) 2008 NVIDIA, Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ *
+ * NV-CONTROL Protocol Version History
+ *
+ * 1.0 - 1.5   NVIDIA Internal development versions
+ * 1.6         Initial public version
+ * 1.7         Added QueryBinaryData request
+ * 1.8         Added TargetTypes
+ * 1.9         Added QueryTargetCount request
+ * 1.10        Fixed target type/id byte ordering for compatibility with
+ *             pre-1.8 NV-CONTROL clients
+ * 1.11        NVIDIA Internal development version
+ * 1.12        Added StringOperation request
+ * 1.13        NVIDIA Internal development version
+ * 1.14        Fixed an NV_CTRL_BINARY_DATA_MODELINES double scan modeline
+ *             reporting bug (vsyncstart, vsyncend, and vtotal were incorrectly
+ *             doubled)
+ * 1.15        Added AVAILABILITY_TARGET_ATTRIBUTE_CHANGED_EVENT
+ * 1.16        Added TARGET_STRING_ATTRIBUTE_CHANGED_EVENT
+ * 1.17        Added TARGET_BINARY_ATTRIBUTE_CHANGED_EVENT
+ * 1.18        Updated QueryTargetCount to return a count of 0, rather than
+ *             BadMatch, if an unknown TargetType is specified
+ * 1.19        Added TargetType support for SetAttributeAndGetStatus and
+ *             SetStringAttribute requests
+ * 1.20        Added COOLER TargetType
+ * 1.21        Added initial 64-bit integer attribute support (read-only)
+ * 1.22        Added X_nvCtrlQueryValidStringAttributeValues to check
+ *             string attribute permissions.
+ * 1.23        Added SENSOR TargetType
+ * 1.24        Fixed a bug where SLI_MOSAIC_MODE_AVAILABLE attribute would
+ *             report false positives via the GPU and X screen target types
+ * 1.25        Added 3D_VISION_PRO_TRANSCEIVER TargetType
+ * 1.26        Added XNVCTRLQueryXXXAttributePermissions.
+ * 1.27        Added DISPLAY TargetType
+ * 1.28        Added NV_CTRL_CURRENT_METAMODE_ID: clients should use this
+ *             attribute to switch MetaModes, rather than pass the MetaMode ID
+ *             through the RRSetScreenConfig protocol request.
+ */
+
+#ifndef __NVCONTROL_H
+#define __NVCONTROL_H
+
+#define NV_CONTROL_ERRORS 0
+#define NV_CONTROL_EVENTS 5
+#define NV_CONTROL_NAME "NV-CONTROL"
+
+#define NV_CONTROL_MAJOR 1
+#define NV_CONTROL_MINOR 28
+
+#define X_nvCtrlQueryExtension 0
+#define X_nvCtrlIsNv 1
+#define X_nvCtrlQueryAttribute 2
+#define X_nvCtrlSetAttribute 3
+#define X_nvCtrlQueryStringAttribute 4
+#define X_nvCtrlQueryValidAttributeValues 5
+#define X_nvCtrlSelectNotify 6
+#define X_nvCtrlSetGvoColorConversionDeprecated 7
+#define X_nvCtrlQueryGvoColorConversionDeprecated 8
+#define X_nvCtrlSetStringAttribute 9
+/* STUB X_nvCtrlQueryDDCCILutSize                   10 */
+/* STUB X_nvCtrlQueryDDCCISinglePointLutOperation   11 */
+/* STUB X_nvCtrlSetDDCCISinglePointLutOperation     12 */
+/* STUB X_nvCtrlQueryDDCCIBlockLutOperation         13 */
+/* STUB X_nvCtrlSetDDCCIBlockLutOperation           14 */
+/* STUB X_nvCtrlSetDDCCIRemoteProcedureCall         15 */
+/* STUB X_nvCtrlQueryDDCCIDisplayControllerType     16 */
+/* STUB X_nvCtrlQueryDDCCICapabilities              17 */
+/* STUB X_nvCtrlQueryDDCCITimingReport              18 */
+#define X_nvCtrlSetAttributeAndGetStatus 19
+#define X_nvCtrlQueryBinaryData 20
+#define X_nvCtrlSetGvoColorConversion 21
+#define X_nvCtrlQueryGvoColorConversion 22
+#define X_nvCtrlSelectTargetNotify 23
+#define X_nvCtrlQueryTargetCount 24
+#define X_nvCtrlStringOperation 25
+#define X_nvCtrlQueryValidAttributeValues64 26
+#define X_nvCtrlQueryAttribute64 27
+#define X_nvCtrlQueryValidStringAttributeValues 28
+#define X_nvCtrlQueryAttributePermissions 29
+#define X_nvCtrlQueryStringAttributePermissions 30
+#define X_nvCtrlQueryBinaryDataAttributePermissions 31
+#define X_nvCtrlQueryStringOperationAttributePermissions 32
+
+#define X_nvCtrlLastRequest (X_nvCtrlQueryStringOperationAttributePermissions + 1)
+
+/* Define 32 bit floats */
+typedef float FLOAT32;
+#ifndef F32
+#define F32
+#endif
+
+typedef struct
+{
+    CARD8 reqType;
+    CARD8 nvReqType;
+    CARD16 length B16;
+} xnvCtrlQueryExtensionReq;
+#define sz_xnvCtrlQueryExtensionReq 4
+
+typedef struct
+{
+    BYTE type; /* X_Reply */
+    CARD8 padb1;
+    CARD16 sequenceNumber B16;
+    CARD32 length B32;
+    CARD16 major B16;
+    CARD16 minor B16;
+    CARD32 padl4 B32;
+    CARD32 padl5 B32;
+    CARD32 padl6 B32;
+    CARD32 padl7 B32;
+    CARD32 padl8 B32;
+} xnvCtrlQueryExtensionReply;
+#define sz_xnvCtrlQueryExtensionReply 32
+
+typedef struct
+{
+    CARD8 reqType;
+    CARD8 nvReqType;
+    CARD16 length B16;
+    CARD32 screen B32;
+} xnvCtrlIsNvReq;
+#define sz_xnvCtrlIsNvReq 8
+
+typedef struct
+{
+    BYTE type; /* X_Reply */
+    CARD8 padb1;
+    CARD16 sequenceNumber B16;
+    CARD32 length B32;
+    CARD32 isnv B32;
+    CARD32 padl4 B32;
+    CARD32 padl5 B32;
+    CARD32 padl6 B32;
+    CARD32 padl7 B32;
+    CARD32 padl8 B32;
+} xnvCtrlIsNvReply;
+#define sz_xnvCtrlIsNvReply 32
+
+typedef struct
+{
+    CARD8 reqType;
+    CARD8 nvReqType;
+    CARD16 length B16;
+    CARD32 target_type B32;
+} xnvCtrlQueryTargetCountReq;
+#define sz_xnvCtrlQueryTargetCountReq 8
+
+typedef struct
+{
+    BYTE type; /* X_Reply */
+    CARD8 padb1;
+    CARD16 sequenceNumber B16;
+    CARD32 length B32;
+    CARD32 count B32;
+    CARD32 padl4 B32;
+    CARD32 padl5 B32;
+    CARD32 padl6 B32;
+    CARD32 padl7 B32;
+    CARD32 padl8 B32;
+} xnvCtrlQueryTargetCountReply;
+#define sz_xnvCtrlQueryTargetCountReply 32
+
+typedef struct
+{
+    CARD8 reqType;
+    CARD8 nvReqType;
+    CARD16 length B16;
+    CARD16 target_id B16;   /* X screen number or GPU number */
+    CARD16 target_type B16; /* X screen or GPU */
+    CARD32 display_mask B32;
+    CARD32 attribute B32;
+} xnvCtrlQueryAttributeReq;
+#define sz_xnvCtrlQueryAttributeReq 16
+
+typedef struct
+{
+    BYTE type;
+    BYTE pad0;
+    CARD16 sequenceNumber B16;
+    CARD32 length B32;
+    CARD32 flags B32;
+    INT32 value B32;
+    CARD32 pad4 B32;
+    CARD32 pad5 B32;
+    CARD32 pad6 B32;
+    CARD32 pad7 B32;
+} xnvCtrlQueryAttributeReply;
+#define sz_xnvCtrlQueryAttributeReply 32
+
+typedef struct
+{
+    BYTE type;
+    BYTE pad0;
+    CARD16 sequenceNumber B16;
+    CARD32 length B32;
+    CARD32 flags B32;
+    CARD32 pad3 B32;
+    int64_t value_64;
+    CARD32 pad6 B32;
+    CARD32 pad7 B32;
+} xnvCtrlQueryAttribute64Reply;
+#define sz_xnvCtrlQueryAttribute64Reply 32
+
+typedef struct
+{
+    CARD8 reqType;
+    CARD8 nvReqType;
+    CARD16 length B16;
+    CARD16 target_id B16;
+    CARD16 target_type B16;
+    CARD32 display_mask B32;
+    CARD32 attribute B32;
+    INT32 value B32;
+} xnvCtrlSetAttributeReq;
+#define sz_xnvCtrlSetAttributeReq 20
+
+typedef struct
+{
+    CARD8 reqType;
+    CARD8 nvReqType;
+    CARD16 length B16;
+    CARD16 target_id B16;
+    CARD16 target_type B16;
+    CARD32 display_mask B32;
+    CARD32 attribute B32;
+    INT32 value B32;
+} xnvCtrlSetAttributeAndGetStatusReq;
+#define sz_xnvCtrlSetAttributeAndGetStatusReq 20
+
+typedef struct
+{
+    BYTE type;
+    BYTE pad0;
+    CARD16 sequenceNumber B16;
+    CARD32 length B32;
+    CARD32 flags B32;
+    CARD32 pad3 B32;
+    CARD32 pad4 B32;
+    CARD32 pad5 B32;
+    CARD32 pad6 B32;
+    CARD32 pad7 B32;
+} xnvCtrlSetAttributeAndGetStatusReply;
+#define sz_xnvCtrlSetAttributeAndGetStatusReply 32
+
+typedef struct
+{
+    CARD8 reqType;
+    CARD8 nvReqType;
+    CARD16 length B16;
+    CARD16 target_id B16;   /* X screen number or GPU number */
+    CARD16 target_type B16; /* X screen or GPU */
+    CARD32 display_mask B32;
+    CARD32 attribute B32;
+} xnvCtrlQueryStringAttributeReq;
+#define sz_xnvCtrlQueryStringAttributeReq 16
+
+typedef struct
+{
+    BYTE type;
+    BYTE pad0;
+    CARD16 sequenceNumber B16;
+    CARD32 length B32;
+    CARD32 flags B32;
+    CARD32 n B32; /* Length of string */
+    CARD32 pad4 B32;
+    CARD32 pad5 B32;
+    CARD32 pad6 B32;
+    CARD32 pad7 B32;
+} xnvCtrlQueryStringAttributeReply;
+#define sz_xnvCtrlQueryStringAttributeReply 32
+
+typedef struct
+{
+    CARD8 reqType;
+    CARD8 nvReqType;
+    CARD16 length B16;
+    CARD16 target_id B16;
+    CARD16 target_type B16;
+    CARD32 display_mask B32;
+    CARD32 attribute B32;
+    CARD32 num_bytes B32;
+} xnvCtrlSetStringAttributeReq;
+#define sz_xnvCtrlSetStringAttributeReq 20
+
+typedef struct
+{
+    BYTE type;
+    BYTE pad0;
+    CARD16 sequenceNumber B16;
+    CARD32 length B32;
+    CARD32 flags B32;
+    CARD32 pad3 B32;
+    CARD32 pad4 B32;
+    CARD32 pad5 B32;
+    CARD32 pad6 B32;
+    CARD32 pad7 B32;
+} xnvCtrlSetStringAttributeReply;
+#define sz_xnvCtrlSetStringAttributeReply 32
+
+typedef struct
+{
+    CARD8 reqType;
+    CARD8 nvReqType;
+    CARD16 length B16;
+    CARD16 target_id B16;   /* X screen number or GPU number */
+    CARD16 target_type B16; /* X screen or GPU */
+    CARD32 display_mask B32;
+    CARD32 attribute B32;
+} xnvCtrlQueryValidAttributeValuesReq;
+#define sz_xnvCtrlQueryValidAttributeValuesReq 16
+
+typedef struct
+{
+    BYTE type;
+    BYTE pad0;
+    CARD16 sequenceNumber B16;
+    CARD32 length B32;
+    CARD32 flags B32;
+    INT32 attr_type B32;
+    INT32 min B32;
+    INT32 max B32;
+    CARD32 bits B32;
+    CARD32 perms B32;
+} xnvCtrlQueryValidAttributeValuesReply;
+#define sz_xnvCtrlQueryValidAttributeValuesReply 32
+
+typedef struct
+{
+    BYTE type;
+    BYTE pad0;
+    CARD16 sequenceNumber B16;
+    CARD32 length B32;
+    CARD32 flags B32;
+    INT32 attr_type B32;
+    int64_t min_64;
+    int64_t max_64;
+    CARD64 bits_64;
+    CARD32 perms B32;
+    CARD32 pad1 B32;
+} xnvCtrlQueryValidAttributeValues64Reply;
+#define sz_xnvCtrlQueryValidAttributeValues64Reply 48
+#define sz_xnvCtrlQueryValidAttributeValues64Reply_extra ((48 - 32) >> 2)
+
+typedef struct
+{
+    CARD8 reqType;
+    CARD8 nvReqType;
+    CARD16 length B16;
+    CARD32 attribute B32;
+} xnvCtrlQueryAttributePermissionsReq;
+#define sz_xnvCtrlQueryAttributePermissionsReq 8
+
+typedef struct
+{
+    BYTE type;
+    BYTE pad0;
+    CARD16 sequenceNumber B16;
+    CARD32 length B32;
+    CARD32 flags B32;
+    INT32 attr_type B32;
+    CARD32 perms B32;
+    CARD32 pad5 B32;
+    CARD32 pad6 B32;
+    CARD32 pad7 B32;
+    CARD32 pad8 B32;
+} xnvCtrlQueryAttributePermissionsReply;
+#define sz_xnvCtrlQueryAttributePermissionsReply 32
+
+/* Set GVO Color Conversion request (deprecated) */
+typedef struct
+{
+    CARD8 reqType;
+    CARD8 nvReqType;
+    CARD16 length B16;
+    CARD32 screen B32;
+    FLOAT32 row1_col1 F32;
+    FLOAT32 row1_col2 F32;
+    FLOAT32 row1_col3 F32;
+    FLOAT32 row1_col4 F32;
+    FLOAT32 row2_col1 F32;
+    FLOAT32 row2_col2 F32;
+    FLOAT32 row2_col3 F32;
+    FLOAT32 row2_col4 F32;
+    FLOAT32 row3_col1 F32;
+    FLOAT32 row3_col2 F32;
+    FLOAT32 row3_col3 F32;
+    FLOAT32 row3_col4 F32;
+} xnvCtrlSetGvoColorConversionDeprecatedReq;
+#define sz_xnvCtrlSetGvoColorConversionDeprecatedReq 56
+
+/* Query GVO Color Conversion request (deprecated) */
+typedef struct
+{
+    CARD8 reqType;
+    CARD8 nvReqType;
+    CARD16 length B16;
+    CARD32 screen B32;
+} xnvCtrlQueryGvoColorConversionDeprecatedReq;
+#define sz_xnvCtrlQueryGvoColorConversionDeprecatedReq 8
+
+/* Query GVO Color Conversion reply (deprecated) */
+typedef struct
+{
+    BYTE type; /* X_Reply */
+    BYTE pad0;
+    CARD16 sequenceNumber B16;
+    CARD32 length B32;
+    CARD32 pad3 B32;
+    CARD32 pad4 B32;
+    CARD32 pad5 B32;
+    CARD32 pad6 B32;
+    CARD32 pad7 B32;
+    CARD32 pad8 B32;
+} xnvCtrlQueryGvoColorConversionDeprecatedReply;
+#define sz_xnvCtrlQueryGvoColorConversionDeprecatedReply 32
+
+/* Set GVO Color Conversion request */
+typedef struct
+{
+    CARD8 reqType;
+    CARD8 nvReqType;
+    CARD16 length B16;
+    CARD32 screen B32;
+
+    FLOAT32 cscMatrix_y_r F32;
+    FLOAT32 cscMatrix_y_g F32;
+    FLOAT32 cscMatrix_y_b F32;
+
+    FLOAT32 cscMatrix_cr_r F32;
+    FLOAT32 cscMatrix_cr_g F32;
+    FLOAT32 cscMatrix_cr_b F32;
+
+    FLOAT32 cscMatrix_cb_r F32;
+    FLOAT32 cscMatrix_cb_g F32;
+    FLOAT32 cscMatrix_cb_b F32;
+
+    FLOAT32 cscOffset_y F32;
+    FLOAT32 cscOffset_cr F32;
+    FLOAT32 cscOffset_cb F32;
+
+    FLOAT32 cscScale_y F32;
+    FLOAT32 cscScale_cr F32;
+    FLOAT32 cscScale_cb F32;
+
+} xnvCtrlSetGvoColorConversionReq;
+#define sz_xnvCtrlSetGvoColorConversionReq 68
+
+/* Query GVO Color Conversion request */
+typedef struct
+{
+    CARD8 reqType;
+    CARD8 nvReqType;
+    CARD16 length B16;
+    CARD32 screen B32;
+} xnvCtrlQueryGvoColorConversionReq;
+#define sz_xnvCtrlQueryGvoColorConversionReq 8
+
+/* Query GVO Color Conversion reply */
+typedef struct
+{
+    BYTE type; /* X_Reply */
+    BYTE pad0;
+    CARD16 sequenceNumber B16;
+    CARD32 length B32;
+    CARD32 pad3 B32;
+    CARD32 pad4 B32;
+    CARD32 pad5 B32;
+    CARD32 pad6 B32;
+    CARD32 pad7 B32;
+    CARD32 pad8 B32;
+} xnvCtrlQueryGvoColorConversionReply;
+#define sz_xnvCtrlQueryGvoColorConversionReply 32
+
+typedef struct
+{
+    CARD8 reqType;
+    CARD8 nvReqType;
+    CARD16 length B16;
+    CARD16 target_id B16;   /* X screen number or GPU number */
+    CARD16 target_type B16; /* X screen or GPU */
+    CARD32 display_mask B32;
+    CARD32 attribute B32;
+} xnvCtrlQueryBinaryDataReq;
+#define sz_xnvCtrlQueryBinaryDataReq 16
+
+typedef struct
+{
+    BYTE type;
+    BYTE pad0;
+    CARD16 sequenceNumber B16;
+    CARD32 length B32;
+    CARD32 flags B32;
+    CARD32 n B32;
+    CARD32 pad4 B32;
+    CARD32 pad5 B32;
+    CARD32 pad6 B32;
+    CARD32 pad7 B32;
+} xnvCtrlQueryBinaryDataReply;
+#define sz_xnvCtrlQueryBinaryDataReply 32
+
+typedef struct
+{
+    CARD8 reqType;
+    CARD8 nvReqType;
+    CARD16 length B16;
+    CARD32 screen B32;
+    CARD16 notifyType B16;
+    CARD16 onoff B16;
+} xnvCtrlSelectNotifyReq;
+#define sz_xnvCtrlSelectNotifyReq 12
+
+typedef struct
+{
+    CARD8 reqType;
+    CARD8 nvReqType;
+    CARD16 length B16;
+    CARD16 target_id B16;   /* X screen number or GPU number */
+    CARD16 target_type B16; /* X screen or GPU */
+    CARD32 display_mask B32;
+    CARD32 attribute B32;
+    CARD32 num_bytes B32; /* Length of string */
+} xnvCtrlStringOperationReq;
+#define sz_xnvCtrlStringOperationReq 20
+
+typedef struct
+{
+    BYTE type; /* X_Reply */
+    CARD8 padb1;
+    CARD16 sequenceNumber B16;
+    CARD32 length B32;
+    CARD32 ret B32;
+    CARD32 num_bytes B32; /* Length of string */
+    CARD32 padl4 B32;
+    CARD32 padl5 B32;
+    CARD32 padl6 B32;
+    CARD32 padl7 B32;
+} xnvCtrlStringOperationReply;
+#define sz_xnvCtrlStringOperationReply 32
+
+typedef struct
+{
+    union
+    {
+        struct
+        {
+            BYTE type;
+            BYTE detail;
+            CARD16 sequenceNumber B16;
+        } u;
+        struct
+        {
+            BYTE type;
+            BYTE detail;
+            CARD16 sequenceNumber B16;
+            CARD32 time B32;
+            CARD32 screen B32;
+            CARD32 display_mask B32;
+            CARD32 attribute B32;
+            CARD32 value B32;
+            CARD32 pad0 B32;
+            CARD32 pad1 B32;
+        } attribute_changed;
+    } u;
+} xnvctrlEvent;
+
+/*
+ * Leave target_type before target_id for the
+ * xnvCtrlSelectTargetNotifyReq and xnvctrlEventTarget
+ * structures, even though other request protocol structures
+ * store target_id in the bottom 16-bits of the second DWORD of the
+ * structures.  The event-related structures were added in version
+ * 1.8, and so there is no prior version with which to maintain
+ * compatibility.
+ */
+typedef struct
+{
+    CARD8 reqType;
+    CARD8 nvReqType;
+    CARD16 length B16;
+    CARD16 target_type B16; /* Don't swap these */
+    CARD16 target_id B16;
+    CARD16 notifyType B16;
+    CARD16 onoff B16;
+} xnvCtrlSelectTargetNotifyReq;
+#define sz_xnvCtrlSelectTargetNotifyReq 12
+
+typedef struct
+{
+    union
+    {
+        struct
+        {
+            BYTE type;
+            BYTE detail;
+            CARD16 sequenceNumber B16;
+        } u;
+        struct
+        {
+            BYTE type;
+            BYTE detail;
+            CARD16 sequenceNumber B16;
+            CARD32 time B32;
+            CARD16 target_type B16; /* Don't swap these */
+            CARD16 target_id B16;
+            CARD32 display_mask B32;
+            CARD32 attribute B32;
+            CARD32 value B32;
+            CARD32 pad0 B32;
+            CARD32 pad1 B32;
+        } attribute_changed;
+        struct
+        {
+            BYTE type;
+            BYTE detail;
+            CARD16 sequenceNumber B16;
+            CARD32 time B32;
+            CARD16 target_type B16; /* Don't swap these */
+            CARD16 target_id B16;
+            CARD32 display_mask B32;
+            CARD32 attribute B32;
+            CARD32 value B32;
+            CARD8 availability;
+            CARD8 pad0;
+            CARD16 pad1 B16;
+            CARD32 pad2 B32;
+        } availability_changed;
+    } u;
+} xnvctrlEventTarget;
+
+#endif /* __NVCONTROL_H */