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authorIan Romanick <ian.d.romanick@intel.com>2009-04-24 19:09:21 (GMT)
committerIan Romanick <ian.d.romanick@intel.com>2009-04-24 19:24:07 (GMT)
commit28ddfc88d8d547941c7f4713db527a3c2f9ec35a (patch)
tree1acfa64466ea36faf4c8074b37d9f8c706a701cb
parenta1c98f7fa9aa0cd5075ef2054c5d2be4d1e740f0 (diff)
DRI2: Add interface for drivers to query DRI2 extension version
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
-rw-r--r--hw/xfree86/dri2/dri2.c9
-rw-r--r--hw/xfree86/dri2/dri2.h18
2 files changed, 27 insertions, 0 deletions
diff --git a/hw/xfree86/dri2/dri2.c b/hw/xfree86/dri2/dri2.c
index 0b52a0f..80de18f 100644
--- a/hw/xfree86/dri2/dri2.c
+++ b/hw/xfree86/dri2/dri2.c
@@ -380,3 +380,12 @@ static XF86ModuleVersionInfo DRI2VersRec =
_X_EXPORT XF86ModuleData dri2ModuleData = { &DRI2VersRec, DRI2Setup, NULL };
+void
+DRI2Version(int *major, int *minor)
+{
+ if (major != NULL)
+ *major = DRI2VersRec.majorversion;
+
+ if (minor != NULL)
+ *minor = DRI2VersRec.minorversion;
+}
diff --git a/hw/xfree86/dri2/dri2.h b/hw/xfree86/dri2/dri2.h
index 847e57c..9d7d6dc 100644
--- a/hw/xfree86/dri2/dri2.h
+++ b/hw/xfree86/dri2/dri2.h
@@ -100,4 +100,22 @@ extern _X_EXPORT int DRI2CopyRegion(DrawablePtr pDraw,
unsigned int dest,
unsigned int src);
+/**
+ * Determine the major and minor version of the DRI2 extension.
+ *
+ * Provides a mechanism to other modules (e.g., 2D drivers) to determine the
+ * version of the DRI2 extension. While it is possible to peek directly at
+ * the \c XF86ModuleData from a layered module, such a module will fail to
+ * load (due to an unresolved symbol) if the DRI2 extension is not loaded.
+ *
+ * \param major Location to store the major verion of the DRI2 extension
+ * \param minor Location to store the minor verion of the DRI2 extension
+ *
+ * \note
+ * This interface was added some time after the initial release of the DRI2
+ * module. Layered modules that wish to use this interface must first test
+ * its existance by calling \c xf86LoaderCheckSymbol.
+ */
+extern _X_EXPORT void DRI2Version(int *major, int *minor);
+
#endif