i965: Set the CC VP state immediately on state change.

The cache lookup of these two little floats was .12% of total CPU time
on firefox-talos-gfx because we did it any time commonly-changed state
changed.  On the other hand, updating the CC VP bo immediately whenver
CC VP state changes is a .07% overhead due to putting a driver hoook
in glEnable().

1 files changed, 49 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_state.c b/src/mesa/drivers/dri/i965/brw_state.c
new file mode 100644
index 0000000000..1e77e427d3
--- /dev/null
+++ b/src/mesa/drivers/dri/i965/brw_state.c
@@ -0,0 +1,49 @@
+/*
+ * Copyright © 2010 Intel Corporation
+ *
+ * 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
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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:
+ *    Eric Anholt <eric@anholt.net>
+ *
+ */
+
+#include "brw_context.h"
+
+void
+brw_enable(GLcontext *ctx, GLenum cap, GLboolean state)
+{
+   struct brw_context *brw = brw_context(ctx);
+
+   switch (cap) {
+   case GL_DEPTH_CLAMP:
+      brw_update_cc_vp(brw);
+      break;
+   }
+}
+
+void
+brw_depth_range(GLcontext *ctx, GLclampd nearval, GLclampd farval)
+{
+   struct brw_context *brw = brw_context(ctx);
+
+   if (ctx->Transform.DepthClamp)
+      brw_update_cc_vp(brw);
+}