From e508f7f08e6fa4292136a377150fc058c041fbc0 Mon Sep 17 00:00:00 2001
From: Alan Hourihane <alanh@tungstengraphics.com>
Date: Tue, 30 Sep 2003 11:28:16 +0000
Subject: add gamma driver - no kernel driver yet (build tested, not physically
 tested)

---
 src/mesa/drivers/dri/gamma/gamma_lock.c | 59 +++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 src/mesa/drivers/dri/gamma/gamma_lock.c

(limited to 'src/mesa/drivers/dri/gamma/gamma_lock.c')

diff --git a/src/mesa/drivers/dri/gamma/gamma_lock.c b/src/mesa/drivers/dri/gamma/gamma_lock.c
new file mode 100644
index 0000000000..4c0970f090
--- /dev/null
+++ b/src/mesa/drivers/dri/gamma/gamma_lock.c
@@ -0,0 +1,59 @@
+/* $XFree86: xc/lib/GL/mesa/src/drv/gamma/gamma_lock.c,v 1.4 2002/11/05 17:46:07 tsi Exp $ */
+
+#include "gamma_context.h"
+#include "gamma_lock.h"
+
+#ifdef DEBUG_LOCKING
+char *prevLockFile = NULL;
+int prevLockLine = 0;
+#endif
+
+
+/* Update the hardware state.  This is called if another context has
+ * grabbed the hardware lock, which includes the X server.  This
+ * function also updates the driver's window state after the X server
+ * moves, resizes or restacks a window -- the change will be reflected
+ * in the drawable position and clip rects.  Since the X server grabs
+ * the hardware lock when it changes the window state, this routine will
+ * automatically be called after such a change.
+ */
+void gammaGetLock( gammaContextPtr gmesa, GLuint flags )
+{
+   __DRIdrawablePrivate *dPriv = gmesa->driDrawable;
+   __DRIscreenPrivate *sPriv = gmesa->driScreen;
+
+   drmGetLock( gmesa->driFd, gmesa->hHWContext, flags );
+
+   /* The window might have moved, so we might need to get new clip
+    * rects.
+    *
+    * NOTE: This releases and regrabs the hw lock to allow the X server
+    * to respond to the DRI protocol request for new drawable info.
+    * Since the hardware state depends on having the latest drawable
+    * clip rects, all state checking must be done _after_ this call.
+    */
+   DRI_VALIDATE_DRAWABLE_INFO( sPriv, dPriv );
+
+   if ( gmesa->lastStamp != dPriv->lastStamp ) {
+      gmesa->lastStamp = dPriv->lastStamp;
+      gmesa->new_state |= GAMMA_NEW_WINDOW | GAMMA_NEW_CLIP;
+   }
+
+   gmesa->numClipRects = dPriv->numClipRects;
+   gmesa->pClipRects = dPriv->pClipRects;
+
+#if 0
+   gmesa->dirty = ~0;
+
+   if ( sarea->ctxOwner != gmesa->hHWContext ) {
+      sarea->ctxOwner = gmesa->hHWContext;
+      gmesa->dirty = GAMMA_UPLOAD_ALL;
+   }
+
+   for ( i = 0 ; i < gmesa->lastTexHeap ; i++ ) {
+      if ( sarea->texAge[i] != gmesa->lastTexAge[i] ) {
+	 gammaAgeTextures( gmesa, i );
+      }
+   }
+#endif
+}
-- 
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