patch to import Jon Smirl's work from Bitkeeper

1 files changed, 123 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/r128/r128_lock.c b/src/mesa/drivers/dri/r128/r128_lock.c
new file mode 100644
index 00000000000..12eb0128b03
--- /dev/null
+++ b/src/mesa/drivers/dri/r128/r128_lock.c
@@ -0,0 +1,123 @@
+/* $XFree86: xc/lib/GL/mesa/src/drv/r128/r128_lock.c,v 1.5 2002/10/30 12:51:38 alanh Exp $ */
+/**************************************************************************
+
+Copyright 1999, 2000 ATI Technologies Inc. and Precision Insight, Inc.,
+                                               Cedar Park, Texas.
+All Rights Reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the "Software"),
+to deal in the Software without restriction, including without limitation
+on the rights to use, copy, modify, merge, publish, distribute, sub
+license, and/or sell copies of the Software, and to permit persons to whom
+the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice (including the next
+paragraph) shall be included in all copies or substantial portions of the
+Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ATI, PRECISION INSIGHT AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
+DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+**************************************************************************/
+
+/*
+ * Authors:
+ *   Gareth Hughes <[email protected]>
+ *
+ */
+
+#include "r128_context.h"
+#include "r128_lock.h"
+#include "r128_tex.h"
+#include "r128_state.h"
+
+#if DEBUG_LOCKING
+char *prevLockFile = NULL;
+int prevLockLine = 0;
+#endif
+
+
+/* Turn on/off page flipping according to the flags in the sarea:
+ */
+static void
+r128UpdatePageFlipping( r128ContextPtr rmesa )
+{
+   int use_back;
+
+   rmesa->doPageFlip = rmesa->sarea->pfAllowPageFlip;
+
+   use_back = (rmesa->glCtx->Color._DrawDestMask == BACK_LEFT_BIT);
+   use_back ^= (rmesa->sarea->pfCurrentPage == 1);
+
+   if ( R128_DEBUG & DEBUG_VERBOSE_API )
+      fprintf(stderr, "%s allow %d current %d\n", __FUNCTION__, 
+	      rmesa->doPageFlip,
+	      rmesa->sarea->pfCurrentPage );
+
+   if ( use_back ) {
+	 rmesa->drawOffset = rmesa->r128Screen->backOffset;
+	 rmesa->drawPitch  = rmesa->r128Screen->backPitch;
+   } else {
+	 rmesa->drawOffset = rmesa->r128Screen->frontOffset;
+	 rmesa->drawPitch  = rmesa->r128Screen->frontPitch;
+   }
+
+   rmesa->setup.dst_pitch_offset_c = (((rmesa->drawPitch/8) << 21) |
+                                      (rmesa->drawOffset >> 5));
+   rmesa->new_state |= R128_NEW_WINDOW;
+}
+
+/* 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 r128GetLock( r128ContextPtr rmesa, GLuint flags )
+{
+   __DRIdrawablePrivate *dPriv = rmesa->driDrawable;
+   __DRIscreenPrivate *sPriv = rmesa->driScreen;
+   R128SAREAPrivPtr sarea = rmesa->sarea;
+   int i;
+
+   drmGetLock( rmesa->driFd, rmesa->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 ( rmesa->lastStamp != dPriv->lastStamp ) {
+      r128UpdatePageFlipping( rmesa );
+      rmesa->lastStamp = dPriv->lastStamp;
+      rmesa->new_state |= R128_NEW_CLIP;
+      rmesa->SetupNewInputs = ~0;
+   }
+
+   rmesa->dirty |= R128_UPLOAD_CONTEXT | R128_UPLOAD_CLIPRECTS;
+
+   rmesa->numClipRects = dPriv->numClipRects;
+   rmesa->pClipRects = dPriv->pClipRects;
+
+   if ( sarea->ctxOwner != rmesa->hHWContext ) {
+      sarea->ctxOwner = rmesa->hHWContext;
+      rmesa->dirty = R128_UPLOAD_ALL;
+   }
+
+   for ( i = 0 ; i < rmesa->nr_heaps ; i++ ) {
+      DRI_AGE_TEXTURES( rmesa->texture_heaps[i] );
+   }
+}