Mesa (master): glxglvnddispatch: Add missing dispatch for GetDriverConfig

[Hans de Goede]

Module: Mesa
Branch: master
Commit: 84f764a7591715104b28c035c837ce9fd86157ad
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=84f764a7591715104b28c035c837ce9fd86157ad

Author: Hans de Goede <hdegoede at redhat.com>
Date:   Mon Mar 20 08:41:26 2017 +0100

glxglvnddispatch: Add missing dispatch for GetDriverConfig

Together with some fixes to xdriinfo this fixes xdriinfo not working
with glvnd.

Since apps (xdriinfo) expect GetDriverConfig to work without going to
need through the dance to setup a glxcontext (which is a reasonable
expectation IMHO), the dispatch for this ends up significantly different
then any other dispatch function.

This patch gets the job done, but I'm not really happy with how this
patch turned out, suggestions for a better fix are welcome.

Cc: Kyle Brenneman <kbrenneman at nvidia.com>
Signed-off-by: Hans de Goede <hdegoede at redhat.com>
Reviewed-by: Emil Velikov <emil.velikov at collabora.com>
Cc: mesa-stable at lists.freedesktop.org

---

 src/glx/g_glxglvnddispatchfuncs.c   | 14 ++++++++++++++
 src/glx/g_glxglvnddispatchindices.h |  1 +
 2 files changed, 15 insertions(+)

diff --git a/src/glx/g_glxglvnddispatchfuncs.c b/src/glx/g_glxglvnddispatchfuncs.c
index b5e33981ad..56d894eda7 100644
--- a/src/glx/g_glxglvnddispatchfuncs.c
+++ b/src/glx/g_glxglvnddispatchfuncs.c
@@ -4,6 +4,7 @@
  */
 #include <stdlib.h>
 
+#include "glxclient.h"
 #include "glxglvnd.h"
 #include "glxglvnddispatchfuncs.h"
 #include "g_glxglvnddispatchindices.h"
@@ -50,6 +51,7 @@ const char * const __glXDispatchTableStrings[DI_LAST_INDEX] = {
     __ATTRIB(GetCurrentDisplayEXT),
     // glXGetCurrentDrawable implemented by libglvnd
     // glXGetCurrentReadDrawable implemented by libglvnd
+    __ATTRIB(GetDriverConfig),
     // glXGetFBConfigAttrib implemented by libglvnd
     __ATTRIB(GetFBConfigAttribSGIX),
     __ATTRIB(GetFBConfigFromVisualSGIX),
@@ -334,6 +336,17 @@ static Display *dispatch_GetCurrentDisplayEXT(void)
 
 
 
+static const char *dispatch_GetDriverConfig(const char *driverName)
+{
+    /*
+     * The options are constant for a given driverName, so we do not need
+     * a context (and apps expect to be able to call this without one).
+     */
+    return glXGetDriverConfig(driverName);
+}
+
+
+
 static int dispatch_GetFBConfigAttribSGIX(Display *dpy, GLXFBConfigSGIX config,
                                           int attribute, int *value_return)
 {
@@ -939,6 +952,7 @@ const void * const __glXDispatchFunctions[DI_LAST_INDEX + 1] = {
     __ATTRIB(DestroyGLXPbufferSGIX),
     __ATTRIB(GetContextIDEXT),
     __ATTRIB(GetCurrentDisplayEXT),
+    __ATTRIB(GetDriverConfig),
     __ATTRIB(GetFBConfigAttribSGIX),
     __ATTRIB(GetFBConfigFromVisualSGIX),
     __ATTRIB(GetMscRateOML),
diff --git a/src/glx/g_glxglvnddispatchindices.h b/src/glx/g_glxglvnddispatchindices.h
index 05a2c8cf3c..3ba50a74ab 100644
--- a/src/glx/g_glxglvnddispatchindices.h
+++ b/src/glx/g_glxglvnddispatchindices.h
@@ -39,6 +39,7 @@ typedef enum __GLXdispatchIndex {
     DI_GetCurrentDisplayEXT,
     // GetCurrentDrawable implemented by libglvnd
     // GetCurrentReadDrawable implemented by libglvnd
+    DI_GetDriverConfig,
     // GetFBConfigAttrib implemented by libglvnd
     DI_GetFBConfigAttribSGIX,
     DI_GetFBConfigFromVisualSGIX,