r200: Prevent flush in middle of rendering.

Patch adds prediction functionthat tries to predict emit size to the smallest
possible values that is quarenteed to be higher than worst case scenario in
rendering pipeline.

State emit size prediction code is in place but fix for emit sizes is included
in next patch.

Signed-off-by: Pauli Nieminen <suokkos@gmail.com>

2 files changed, 24 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/radeon/radeon_common.c b/src/mesa/drivers/dri/radeon/radeon_common.c
index b5b4fed8fa..20cf1f9a56 100644
--- a/src/mesa/drivers/dri/radeon/radeon_common.c
+++ b/src/mesa/drivers/dri/radeon/radeon_common.c
@@ -946,6 +946,29 @@ static void radeon_print_state_atom_kmm(radeonContextPtr radeon, struct radeon_s
 	}
 }
 
+/**
+ * Count total size for next state emit.
+ **/
+GLuint radeonCountEmitSize(radeonContextPtr radeon)
+{
+   struct radeon_state_atom *atom;
+   int dwords = 0;
+   /* check if we are going to emit full state */
+   if (radeon->cmdbuf.cs->cdw && !radeon->hw.all_dirty) {
+      if (!radeon->hw.is_dirty)
+	 return dwords;
+      foreach(atom, &radeon->hw.atomlist) {
+         if (atom->dirty)
+            dwords += atom->check(radeon->glCtx, atom);
+      }
+   } else {
+      foreach(atom, &radeon->hw.atomlist) {
+	 dwords += atom->check(radeon->glCtx, atom);
+      }
+   }
+   return dwords;
+}
+
 static INLINE void radeonEmitAtoms(radeonContextPtr radeon, GLboolean dirty)
 {
 	BATCH_LOCALS(radeon);
diff --git a/src/mesa/drivers/dri/radeon/radeon_common.h b/src/mesa/drivers/dri/radeon/radeon_common.h
index cebae18b2d..6e81100d66 100644
--- a/src/mesa/drivers/dri/radeon/radeon_common.h
+++ b/src/mesa/drivers/dri/radeon/radeon_common.h
@@ -24,6 +24,7 @@ void radeonUpdatePageFlipping(radeonContextPtr rmesa);
 void radeonFlush(GLcontext *ctx);
 void radeonFinish(GLcontext * ctx);
 void radeonEmitState(radeonContextPtr radeon);
+GLuint radeonCountEmitSize(radeonContextPtr radeon);
 
 void radeon_clear_tris(GLcontext *ctx, GLbitfield mask);