From 234286c0f8b7d30ed49223c648d4c73c1a517ab3 Mon Sep 17 00:00:00 2001
From: Jesse Barnes <jbarnes@virtuousgeek.org>
Date: Thu, 22 Apr 2010 12:47:41 -0700
Subject: DRI2: add config query extension

Add a new DRI2 configuration query extension.  Allows for DRI2 client
code to query for common DRI2 configuration options.
---
 src/mesa/drivers/dri/common/dri_util.c | 46 ++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

(limited to 'src/mesa/drivers/dri/common/dri_util.c')

diff --git a/src/mesa/drivers/dri/common/dri_util.c b/src/mesa/drivers/dri/common/dri_util.c
index f1bbd38612..16d4cc5e17 100644
--- a/src/mesa/drivers/dri/common/dri_util.c
+++ b/src/mesa/drivers/dri/common/dri_util.c
@@ -467,6 +467,41 @@ dri2CreateNewDrawable(__DRIscreen *screen,
     return pdraw;
 }
 
+static int
+dri2ConfigQueryb(__DRIscreen *screen, const char *var, GLboolean *val)
+{
+   if (!driCheckOption(&screen->optionCache, var, DRI_BOOL))
+      return -1;
+
+   *val = driQueryOptionb(&screen->optionCache, var);
+
+   return 0;
+}
+
+static int
+dri2ConfigQueryi(__DRIscreen *screen, const char *var, GLint *val)
+{
+   if (!driCheckOption(&screen->optionCache, var, DRI_INT) &&
+       !driCheckOption(&screen->optionCache, var, DRI_ENUM))
+      return -1;
+
+    *val = driQueryOptioni(&screen->optionCache, var);
+
+    return 0;
+}
+
+static int
+dri2ConfigQueryf(__DRIscreen *screen, const char *var, GLfloat *val)
+{
+   if (!driCheckOption(&screen->optionCache, var, DRI_FLOAT))
+      return -1;
+
+    *val = driQueryOptionf(&screen->optionCache, var);
+
+    return 0;
+}
+
+
 static void dri_get_drawable(__DRIdrawable *pdp)
 {
     pdp->refcount++;
@@ -739,6 +774,7 @@ dri2CreateNewScreen(int scrn, int fd,
     static const __DRIextension *emptyExtensionList[] = { NULL };
     __DRIscreen *psp;
     drmVersionPtr version;
+    driOptionCache options;
 
     if (driDriverAPI.InitScreen2 == NULL)
         return NULL;
@@ -771,6 +807,9 @@ dri2CreateNewScreen(int scrn, int fd,
 
     psp->DriverAPI = driDriverAPI;
 
+    driParseOptionInfo(&options, __dri2ConfigOptions, __dri2NConfigOptions);
+    driParseConfigFiles(&psp->optionCache, &options, psp->myNum, "dri2");
+
     return psp;
 }
 
@@ -813,6 +852,13 @@ const __DRIdri2Extension driDRI2Extension = {
     dri2CreateNewContext,
 };
 
+const __DRI2configQueryExtension dri2ConfigQueryExtension = {
+   { __DRI2_CONFIG_QUERY, __DRI2_CONFIG_QUERY_VERSION },
+   dri2ConfigQueryb,
+   dri2ConfigQueryi,
+   dri2ConfigQueryf,
+};
+
 static int
 driFrameTracking(__DRIdrawable *drawable, GLboolean enable)
 {
-- 
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