Add DRI2SwapInterval protocol

Needed to handle swap interval in the direct rendered case.

2 files changed, 33 insertions, 0 deletions

diff --git a/dri2proto.h b/dri2proto.h
index 85b9dbf..31bcdb3 100644
--- a/dri2proto.h
+++ b/dri2proto.h
@@ -53,6 +53,7 @@
 #define X_DRI2GetMSC			9
 #define X_DRI2WaitMSC			10
 #define X_DRI2WaitSBC			11
+#define X_DRI2SwapInterval		12
 
 typedef struct {
     CARD32  attachment B32;
@@ -265,4 +266,13 @@ typedef struct {
 } xDRI2MSCReply;
 #define sz_xDRI2MSCReply 32
 
+typedef struct {
+    CARD8   reqType;
+    CARD8   dri2ReqType;
+    CARD16  length B16;
+    CARD32  drawable B32;
+    CARD32  interval B32;
+} xDRI2SwapIntervalReq;
+#define sz_xDRI2SwapIntervalReq 12
+
 #endif
diff --git a/dri2proto.txt b/dri2proto.txt
index 6430b2a..71fc0ca 100644
--- a/dri2proto.txt
+++ b/dri2proto.txt
@@ -33,6 +33,7 @@ Keith Whitwell <keith@tungstengraphics.com>
 Jerome Glisse <glisse@freedesktop.org>
 Ian Romanick <ian.d.romanick@intel.com>
 Michel Dänzer <michel@tungstengraphics.com>
+Jesse Barnes <jbarnes@virtuousgeek.org>
 
 
 			     ⚙ ⚙ ⚙  ⚙ ⚙ ⚙
@@ -412,6 +413,18 @@ The name of this extension is "DRI2".
 	This request is only available with protocol version 1.2 or
 	later.
 
+┌───
+    DRI2SwapInterval
+	drawable: DRAWABLE
+	interval: CARD32
+      ▶
+└───
+	Errors: Window
+
+	Sets the swap interval for DRAWABLE.  This will throttle
+	DRI2SwapBuffers requests to swap at most once per interval frames,
+	which is useful useful for limiting the frame rate.
+
 			     ⚙ ⚙ ⚙  ⚙ ⚙ ⚙
 
 
@@ -744,6 +757,16 @@ A.2 Protocol Requests
 	4	CARD32			sbc_lo
 └───
 
+┌───
+    DRI2SwapInterval
+	1	CARD8			major opcode
+	1	7			DRI2 opcode
+	2	8			length
+	4	DRAWABLE		drawable
+ 	4	CARD32			interval
+     ▶
+└───
+
 A.3 Protocol Events
 
 The DRI2 extension specifies no events.